Large dos2unix commit...

30 files changed, 12513 insertions, 12513 deletions

diff --git a/lib/lua/src/LuaLib/lauxlib.c b/lib/lua/src/LuaLib/lauxlib.c
index c4b24a7..2088b9e 100644
--- a/lib/lua/src/LuaLib/lauxlib.c
+++ b/lib/lua/src/LuaLib/lauxlib.c
@@ -1,591 +1,591 @@
-/*

-** $Id: lauxlib.c,v 1.3 2004-11-27 21:35:21 pixel Exp $

-** Auxiliary functions for building Lua libraries

-** See Copyright Notice in lua.h

-*/

-

-

-#include <ctype.h>

-#include <errno.h>

-#include <stdarg.h>

-#include <stdio.h>

-#include <string.h>

-

-

-/* This file uses only the official API of Lua.

-** Any function declared here could be written as an application function.

-*/

-

-#define lauxlib_c

-

-#include "lua.h"

-

-#include "lauxlib.h"

-

-

-/* number of prereserved references (for internal use) */

-#define RESERVED_REFS	2

-

-/* reserved references */

-#define FREELIST_REF	1	/* free list of references */

-#define ARRAYSIZE_REF	2	/* array sizes */

-

-

-/* convert a stack index to positive */

-#define abs_index(L, i)		((i) > 0 || (i) <= LUA_REGISTRYINDEX ? (i) : \

-					lua_gettop(L) + (i) + 1)

-

-

-/*

-** {======================================================

-** Error-report functions

-** =======================================================

-*/

-

-

-LUALIB_API int luaL_argerror (lua_State *L, int narg, const char *extramsg) {

-  lua_Debug ar;

-  lua_getstack(L, 0, &ar);

-  lua_getinfo(L, "n", &ar);

-  if (strcmp(ar.namewhat, "method") == 0) {

-    narg--;  /* do not count `self' */

-    if (narg == 0)  /* error is in the self argument itself? */

-      return luaL_error(L, "calling `%s' on bad self (%s)", ar.name, extramsg);

-  }

-  if (ar.name == NULL)

-    ar.name = "?";

-  return luaL_error(L, "bad argument #%d to `%s' (%s)",

-                        narg, ar.name, extramsg);

-}

-

-

-LUALIB_API int luaL_typerror (lua_State *L, int narg, const char *tname) {

-  const char *msg = lua_pushfstring(L, "%s expected, got %s",

-                                    tname, lua_typename(L, lua_type(L,narg)));

-  return luaL_argerror(L, narg, msg);

-}

-

-

-static void tag_error (lua_State *L, int narg, int tag) {

-  luaL_typerror(L, narg, lua_typename(L, tag)); 

-}

-

-

-LUALIB_API void luaL_where (lua_State *L, int level) {

-  lua_Debug ar;

-  if (lua_getstack(L, level, &ar)) {  /* check function at level */

-    lua_getinfo(L, "Snl", &ar);  /* get info about it */

-    if (ar.currentline > 0) {  /* is there info? */

-      lua_pushfstring(L, "%s:%d: ", ar.short_src, ar.currentline);

-      return;

-    }

-  }

-  lua_pushliteral(L, "");  /* else, no information available... */

-}

-

-

-LUALIB_API int luaL_error (lua_State *L, const char *fmt, ...) {

-  va_list argp;

-  va_start(argp, fmt);

-  luaL_where(L, 1);

-  lua_pushvfstring(L, fmt, argp);

-  va_end(argp);

-  lua_concat(L, 2);

-  return lua_error(L);

-}

-

-/* }====================================================== */

-

-

-LUALIB_API int luaL_findstring (const char *name, const char *const list[]) {

-  int i;

-  for (i=0; list[i]; i++)

-    if (strcmp(list[i], name) == 0)

-      return i;

-  return -1;  /* name not found */

-}

-

-

-LUALIB_API int luaL_newmetatable (lua_State *L, const char *tname) {

-  lua_pushstring(L, tname);

-  lua_rawget(L, LUA_REGISTRYINDEX);  /* get registry.name */

-  if (!lua_isnil(L, -1))  /* name already in use? */

-    return 0;  /* leave previous value on top, but return 0 */

-  lua_pop(L, 1);

-  lua_newtable(L);  /* create metatable */

-  lua_pushstring(L, tname);

-  lua_pushvalue(L, -2);

-  lua_rawset(L, LUA_REGISTRYINDEX);  /* registry.name = metatable */

-  lua_pushvalue(L, -1);

-  lua_pushstring(L, tname);

-  lua_rawset(L, LUA_REGISTRYINDEX);  /* registry[metatable] = name */

-  return 1;

-}

-

-

-LUALIB_API void  luaL_getmetatable (lua_State *L, const char *tname) {

-  lua_pushstring(L, tname);

-  lua_rawget(L, LUA_REGISTRYINDEX);

-}

-

-

-LUALIB_API void *luaL_checkudata (lua_State *L, int ud, const char *tname) {

-  const char *tn;

-  if (!lua_getmetatable(L, ud)) return NULL;  /* no metatable? */

-  lua_rawget(L, LUA_REGISTRYINDEX);  /* get registry[metatable] */

-  tn = lua_tostring(L, -1);

-  if (tn && (strcmp(tn, tname) == 0)) {

-    lua_pop(L, 1);

-    return lua_touserdata(L, ud);

-  }

-  else {

-    lua_pop(L, 1);

-    return NULL;

-  }

-}

-

-

-LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *mes) {

-  if (!lua_checkstack(L, space))

-    luaL_error(L, "stack overflow (%s)", mes);

-}

-

-

-LUALIB_API void luaL_checktype (lua_State *L, int narg, int t) {

-  if (lua_type(L, narg) != t)

-    tag_error(L, narg, t);

-}

-

-

-LUALIB_API void luaL_checkany (lua_State *L, int narg) {

-  if (lua_type(L, narg) == LUA_TNONE)

-    luaL_argerror(L, narg, "value expected");

-}

-

-

-LUALIB_API const char *luaL_checklstring (lua_State *L, int narg, size_t *len) {

-  const char *s = lua_tostring(L, narg);

-  if (!s) tag_error(L, narg, LUA_TSTRING);

-  if (len) *len = lua_strlen(L, narg);

-  return s;

-}

-

-

-LUALIB_API const char *luaL_optlstring (lua_State *L, int narg,

-                                        const char *def, size_t *len) {

-  if (lua_isnoneornil(L, narg)) {

-    if (len)

-      *len = (def ? strlen(def) : 0);

-    return def;

-  }

-  else return luaL_checklstring(L, narg, len);

-}

-

-

-LUALIB_API lua_Number luaL_checknumber (lua_State *L, int narg) {

-  lua_Number d = lua_tonumber(L, narg);

-  if (d == 0 && !lua_isnumber(L, narg))  /* avoid extra test when d is not 0 */

-    tag_error(L, narg, LUA_TNUMBER);

-  return d;

-}

-

-

-LUALIB_API lua_Number luaL_optnumber (lua_State *L, int narg, lua_Number def) {

-  if (lua_isnoneornil(L, narg)) return def;

-  else return luaL_checknumber(L, narg);

-}

-

-

-LUALIB_API int luaL_getmetafield (lua_State *L, int obj, const char *event) {

-  if (!lua_getmetatable(L, obj))  /* no metatable? */

-    return 0;

-  lua_pushstring(L, event);

-  lua_rawget(L, -2);

-  if (lua_isnil(L, -1)) {

-    lua_pop(L, 2);  /* remove metatable and metafield */

-    return 0;

-  }

-  else {

-    lua_remove(L, -2);  /* remove only metatable */

-    return 1;

-  }

-}

-

-

-LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) {

-  obj = abs_index(L, obj);

-  if (!luaL_getmetafield(L, obj, event))  /* no metafield? */

-    return 0;

-  lua_pushvalue(L, obj);

-  lua_call(L, 1, 1);

-  return 1;

-}

-

-

-LUALIB_API void luaL_openlib (lua_State *L, const char *libname,

-                              const luaL_reg *l, int nup) {

-  if (libname) {

-    lua_pushstring(L, libname);

-    lua_gettable(L, LUA_GLOBALSINDEX);  /* check whether lib already exists */

-    if (lua_isnil(L, -1)) {  /* no? */

-      lua_pop(L, 1);

-      lua_newtable(L);  /* create it */

-      lua_pushstring(L, libname);

-      lua_pushvalue(L, -2);

-      lua_settable(L, LUA_GLOBALSINDEX);  /* register it with given name */

-    }

-    lua_insert(L, -(nup+1));  /* move library table to below upvalues */

-  }

-  for (; l->name; l++) {

-    int i;

-    lua_pushstring(L, l->name);

-    for (i=0; i<nup; i++)  /* copy upvalues to the top */

-      lua_pushvalue(L, -(nup+1));

-    lua_pushcclosure(L, l->func, nup);

-    lua_settable(L, -(nup+3));

-  }

-  lua_pop(L, nup);  /* remove upvalues */

-}

-

-

-

-/*

-** {======================================================

-** getn-setn: size for arrays

-** =======================================================

-*/

-

-static int checkint (lua_State *L, int topop) {

-  int n = (int)lua_tonumber(L, -1);

-  if (n == 0 && !lua_isnumber(L, -1)) n = -1;

-  lua_pop(L, topop);

-  return n;

-}

-

-

-static void getsizes (lua_State *L) {

-  lua_rawgeti(L, LUA_REGISTRYINDEX, ARRAYSIZE_REF);

-  if (lua_isnil(L, -1)) {  /* no `size' table? */

-    lua_pop(L, 1);  /* remove nil */

-    lua_newtable(L);  /* create it */

-    lua_pushvalue(L, -1);  /* `size' will be its own metatable */

-    lua_setmetatable(L, -2);

-    lua_pushliteral(L, "__mode");

-    lua_pushliteral(L, "k");

-    lua_rawset(L, -3);  /* metatable(N).__mode = "k" */

-    lua_pushvalue(L, -1);

-    lua_rawseti(L, LUA_REGISTRYINDEX, ARRAYSIZE_REF);  /* store in register */

-  }

-}

-

-

-void luaL_setn (lua_State *L, int t, int n) {

-  t = abs_index(L, t);

-  lua_pushliteral(L, "n");

-  lua_rawget(L, t);

-  if (checkint(L, 1) >= 0) {  /* is there a numeric field `n'? */

-    lua_pushliteral(L, "n");  /* use it */

-    lua_pushnumber(L, (lua_Number)n);

-    lua_rawset(L, t);

-  }

-  else {  /* use `sizes' */

-    getsizes(L);

-    lua_pushvalue(L, t);

-    lua_pushnumber(L, (lua_Number)n);

-    lua_rawset(L, -3);  /* sizes[t] = n */

-    lua_pop(L, 1);  /* remove `sizes' */

-  }

-}

-

-

-int luaL_getn (lua_State *L, int t) {

-  int n;

-  t = abs_index(L, t);

-  lua_pushliteral(L, "n");  /* try t.n */

-  lua_rawget(L, t);

-  if ((n = checkint(L, 1)) >= 0) return n;

-  getsizes(L);  /* else try sizes[t] */

-  lua_pushvalue(L, t);

-  lua_rawget(L, -2);

-  if ((n = checkint(L, 2)) >= 0) return n;

-  for (n = 1; ; n++) {  /* else must count elements */

-    lua_rawgeti(L, t, n);

-    if (lua_isnil(L, -1)) break;

-    lua_pop(L, 1);

-  }

-  lua_pop(L, 1);

-  return n - 1;

-}

-

-/* }====================================================== */

-

-

-

-/*

-** {======================================================

-** Generic Buffer manipulation

-** =======================================================

-*/

-

-

-#define bufflen(B)	((B)->p - (B)->buffer)

-#define bufffree(B)	((size_t)(LUAL_BUFFERSIZE - bufflen(B)))

-

-#define LIMIT	(LUA_MINSTACK/2)

-

-

-static int emptybuffer (luaL_Buffer *B) {

-  size_t l = bufflen(B);

-  if (l == 0) return 0;  /* put nothing on stack */

-  else {

-    lua_pushlstring(B->L, B->buffer, l);

-    B->p = B->buffer;

-    B->lvl++;

-    return 1;

-  }

-}

-

-

-static void adjuststack (luaL_Buffer *B) {

-  if (B->lvl > 1) {

-    lua_State *L = B->L;

-    int toget = 1;  /* number of levels to concat */

-    size_t toplen = lua_strlen(L, -1);

-    do {

-      size_t l = lua_strlen(L, -(toget+1));

-      if (B->lvl - toget + 1 >= LIMIT || toplen > l) {

-        toplen += l;

-        toget++;

-      }

-      else break;

-    } while (toget < B->lvl);

-    lua_concat(L, toget);

-    B->lvl = B->lvl - toget + 1;

-  }

-}

-

-

-LUALIB_API char *luaL_prepbuffer (luaL_Buffer *B) {

-  if (emptybuffer(B))

-    adjuststack(B);

-  return B->buffer;

-}

-

-

-LUALIB_API void luaL_addlstring (luaL_Buffer *B, const char *s, size_t l) {

-  while (l--)

-    luaL_putchar(B, *s++);

-}

-

-

-LUALIB_API void luaL_addstring (luaL_Buffer *B, const char *s) {

-  luaL_addlstring(B, s, strlen(s));

-}

-

-

-LUALIB_API void luaL_pushresult (luaL_Buffer *B) {

-  emptybuffer(B);

-  lua_concat(B->L, B->lvl);

-  B->lvl = 1;

-}

-

-

-LUALIB_API void luaL_addvalue (luaL_Buffer *B) {

-  lua_State *L = B->L;

-  size_t vl = lua_strlen(L, -1);

-  if (vl <= bufffree(B)) {  /* fit into buffer? */

-    memcpy(B->p, lua_tostring(L, -1), vl);  /* put it there */

-    B->p += vl;

-    lua_pop(L, 1);  /* remove from stack */

-  }

-  else {

-    if (emptybuffer(B))

-      lua_insert(L, -2);  /* put buffer before new value */

-    B->lvl++;  /* add new value into B stack */

-    adjuststack(B);

-  }

-}

-

-

-LUALIB_API void luaL_buffinit (lua_State *L, luaL_Buffer *B) {

-  B->L = L;

-  B->p = B->buffer;

-  B->lvl = 0;

-}

-

-/* }====================================================== */

-

-

-LUALIB_API int luaL_ref (lua_State *L, int t) {

-  int ref;

-  t = abs_index(L, t);

-  if (lua_isnil(L, -1)) {

-    lua_pop(L, 1);  /* remove from stack */

-    return LUA_REFNIL;  /* `nil' has a unique fixed reference */

-  }

-  lua_rawgeti(L, t, FREELIST_REF);  /* get first free element */

-  ref = (int)lua_tonumber(L, -1);  /* ref = t[FREELIST_REF] */

-  lua_pop(L, 1);  /* remove it from stack */

-  if (ref != 0) {  /* any free element? */

-    lua_rawgeti(L, t, ref);  /* remove it from list */

-    lua_rawseti(L, t, FREELIST_REF);  /* (t[FREELIST_REF] = t[ref]) */

-  }

-  else {  /* no free elements */

-    ref = luaL_getn(L, t);

-    if (ref < RESERVED_REFS)

-      ref = RESERVED_REFS;  /* skip reserved references */

-    ref++;  /* create new reference */

-    luaL_setn(L, t, ref);

-  }

-  lua_rawseti(L, t, ref);

-  return ref;

-}

-

-

-LUALIB_API void luaL_unref (lua_State *L, int t, int ref) {

-  if (ref >= 0) {

-    t = abs_index(L, t);

-    lua_rawgeti(L, t, FREELIST_REF);

-    lua_rawseti(L, t, ref);  /* t[ref] = t[FREELIST_REF] */

-    lua_pushnumber(L, (lua_Number)ref);

-    lua_rawseti(L, t, FREELIST_REF);  /* t[FREELIST_REF] = ref */

-  }

-}

-

-

-

-/*

-** {======================================================

-** Load functions

-** =======================================================

-*/

-

-typedef struct LoadF {

-  FILE *f;

-  char buff[LUAL_BUFFERSIZE];

-} LoadF;

-

-

-static const char *getF (lua_State *L, void *ud, size_t *size) {

-  LoadF *lf = (LoadF *)ud;

-  (void)L;

-  if (feof(lf->f)) return NULL;

-  *size = fread(lf->buff, 1, LUAL_BUFFERSIZE, lf->f);

-  return (*size > 0) ? lf->buff : NULL;

-}

-

-

-static int errfile (lua_State *L, int fnameindex) {

-  const char *filename = lua_tostring(L, fnameindex) + 1;

-  lua_pushfstring(L, "cannot read %s: %s", filename, strerror(errno));

-  lua_remove(L, fnameindex);

-  return LUA_ERRFILE;

-}

-

-

-LUALIB_API int luaL_loadfile (lua_State *L, const char *filename) {

-  LoadF lf;

-  int status, readstatus;

-  int c;

-  int fnameindex = lua_gettop(L) + 1;  /* index of filename on the stack */

-  if (filename == NULL) {

-    lua_pushliteral(L, "=stdin");

-    lf.f = stdin;

-  }

-  else {

-    lua_pushfstring(L, "@%s", filename);

-    lf.f = fopen(filename, "r");

-  }

-  if (lf.f == NULL) return errfile(L, fnameindex);  /* unable to open file */

-  c = ungetc(getc(lf.f), lf.f);

-  if (!(isspace(c) || isprint(c)) && lf.f != stdin) {  /* binary file? */

-    fclose(lf.f);

-    lf.f = fopen(filename, "rb");  /* reopen in binary mode */

-    if (lf.f == NULL) return errfile(L, fnameindex); /* unable to reopen file */

-  }

-  status = lua_load(L, getF, &lf, lua_tostring(L, -1));

-  readstatus = ferror(lf.f);

-  if (lf.f != stdin) fclose(lf.f);  /* close file (even in case of errors) */

-  if (readstatus) {

-    lua_settop(L, fnameindex);  /* ignore results from `lua_load' */

-    return errfile(L, fnameindex);

-  }

-  lua_remove(L, fnameindex);

-  return status;

-}

-

-

-typedef struct LoadS {

-  const char *s;

-  size_t size;

-} LoadS;

-

-

-static const char *getS (lua_State *L, void *ud, size_t *size) {

-  LoadS *ls = (LoadS *)ud;

-  (void)L;

-  if (ls->size == 0) return NULL;

-  *size = ls->size;

-  ls->size = 0;

-  return ls->s;

-}

-

-

-LUALIB_API int luaL_loadbuffer (lua_State *L, const char *buff, size_t size,

-                                const char *name) {

-  LoadS ls;

-  ls.s = buff;

-  ls.size = size;

-  return lua_load(L, getS, &ls, name);

-}

-

-/* }====================================================== */

-

-

-/*

-** {======================================================

-** compatibility code

-** =======================================================

-*/

-

-

-static void callalert (lua_State *L, int status) {

-  if (status != 0) {

-    lua_getglobal(L, "_ALERT");

-    if (lua_isfunction(L, -1)) {

-      lua_insert(L, -2);

-      lua_call(L, 1, 0);

-    }

-    else {  /* no _ALERT function; print it on stderr */

-      fprintf(stderr, "%s\n", lua_tostring(L, -2));

-      lua_pop(L, 2);  /* remove error message and _ALERT */

-    }

-  }

-}

-

-

-static int aux_do (lua_State *L, int status) {

-  if (status == 0) {  /* parse OK? */

-    status = lua_pcall(L, 0, LUA_MULTRET, 0);  /* call main */

-  }

-  callalert(L, status);

-  return status;

-}

-

-

-LUALIB_API int lua_dofile (lua_State *L, const char *filename) {

-  return aux_do(L, luaL_loadfile(L, filename));

-}

-

-

-LUALIB_API int lua_dobuffer (lua_State *L, const char *buff, size_t size,

-                          const char *name) {

-  return aux_do(L, luaL_loadbuffer(L, buff, size, name));

-}

-

-

-LUALIB_API int lua_dostring (lua_State *L, const char *str) {

-  return lua_dobuffer(L, str, strlen(str), str);

-}

-

-/* }====================================================== */

+/*
+** $Id: lauxlib.c,v 1.4 2004-11-27 21:46:10 pixel Exp $
+** Auxiliary functions for building Lua libraries
+** See Copyright Notice in lua.h
+*/
+
+
+#include <ctype.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+
+
+/* This file uses only the official API of Lua.
+** Any function declared here could be written as an application function.
+*/
+
+#define lauxlib_c
+
+#include "lua.h"
+
+#include "lauxlib.h"
+
+
+/* number of prereserved references (for internal use) */
+#define RESERVED_REFS	2
+
+/* reserved references */
+#define FREELIST_REF	1	/* free list of references */
+#define ARRAYSIZE_REF	2	/* array sizes */
+
+
+/* convert a stack index to positive */
+#define abs_index(L, i)		((i) > 0 || (i) <= LUA_REGISTRYINDEX ? (i) : \
+					lua_gettop(L) + (i) + 1)
+
+
+/*
+** {======================================================
+** Error-report functions
+** =======================================================
+*/
+
+
+LUALIB_API int luaL_argerror (lua_State *L, int narg, const char *extramsg) {
+  lua_Debug ar;
+  lua_getstack(L, 0, &ar);
+  lua_getinfo(L, "n", &ar);
+  if (strcmp(ar.namewhat, "method") == 0) {
+    narg--;  /* do not count `self' */
+    if (narg == 0)  /* error is in the self argument itself? */
+      return luaL_error(L, "calling `%s' on bad self (%s)", ar.name, extramsg);
+  }
+  if (ar.name == NULL)
+    ar.name = "?";
+  return luaL_error(L, "bad argument #%d to `%s' (%s)",
+                        narg, ar.name, extramsg);
+}
+
+
+LUALIB_API int luaL_typerror (lua_State *L, int narg, const char *tname) {
+  const char *msg = lua_pushfstring(L, "%s expected, got %s",
+                                    tname, lua_typename(L, lua_type(L,narg)));
+  return luaL_argerror(L, narg, msg);
+}
+
+
+static void tag_error (lua_State *L, int narg, int tag) {
+  luaL_typerror(L, narg, lua_typename(L, tag)); 
+}
+
+
+LUALIB_API void luaL_where (lua_State *L, int level) {
+  lua_Debug ar;
+  if (lua_getstack(L, level, &ar)) {  /* check function at level */
+    lua_getinfo(L, "Snl", &ar);  /* get info about it */
+    if (ar.currentline > 0) {  /* is there info? */
+      lua_pushfstring(L, "%s:%d: ", ar.short_src, ar.currentline);
+      return;
+    }
+  }
+  lua_pushliteral(L, "");  /* else, no information available... */
+}
+
+
+LUALIB_API int luaL_error (lua_State *L, const char *fmt, ...) {
+  va_list argp;
+  va_start(argp, fmt);
+  luaL_where(L, 1);
+  lua_pushvfstring(L, fmt, argp);
+  va_end(argp);
+  lua_concat(L, 2);
+  return lua_error(L);
+}
+
+/* }====================================================== */
+
+
+LUALIB_API int luaL_findstring (const char *name, const char *const list[]) {
+  int i;
+  for (i=0; list[i]; i++)
+    if (strcmp(list[i], name) == 0)
+      return i;
+  return -1;  /* name not found */
+}
+
+
+LUALIB_API int luaL_newmetatable (lua_State *L, const char *tname) {
+  lua_pushstring(L, tname);
+  lua_rawget(L, LUA_REGISTRYINDEX);  /* get registry.name */
+  if (!lua_isnil(L, -1))  /* name already in use? */
+    return 0;  /* leave previous value on top, but return 0 */
+  lua_pop(L, 1);
+  lua_newtable(L);  /* create metatable */
+  lua_pushstring(L, tname);
+  lua_pushvalue(L, -2);
+  lua_rawset(L, LUA_REGISTRYINDEX);  /* registry.name = metatable */
+  lua_pushvalue(L, -1);
+  lua_pushstring(L, tname);
+  lua_rawset(L, LUA_REGISTRYINDEX);  /* registry[metatable] = name */
+  return 1;
+}
+
+
+LUALIB_API void  luaL_getmetatable (lua_State *L, const char *tname) {
+  lua_pushstring(L, tname);
+  lua_rawget(L, LUA_REGISTRYINDEX);
+}
+
+
+LUALIB_API void *luaL_checkudata (lua_State *L, int ud, const char *tname) {
+  const char *tn;
+  if (!lua_getmetatable(L, ud)) return NULL;  /* no metatable? */
+  lua_rawget(L, LUA_REGISTRYINDEX);  /* get registry[metatable] */
+  tn = lua_tostring(L, -1);
+  if (tn && (strcmp(tn, tname) == 0)) {
+    lua_pop(L, 1);
+    return lua_touserdata(L, ud);
+  }
+  else {
+    lua_pop(L, 1);
+    return NULL;
+  }
+}
+
+
+LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *mes) {
+  if (!lua_checkstack(L, space))
+    luaL_error(L, "stack overflow (%s)", mes);
+}
+
+
+LUALIB_API void luaL_checktype (lua_State *L, int narg, int t) {
+  if (lua_type(L, narg) != t)
+    tag_error(L, narg, t);
+}
+
+
+LUALIB_API void luaL_checkany (lua_State *L, int narg) {
+  if (lua_type(L, narg) == LUA_TNONE)
+    luaL_argerror(L, narg, "value expected");
+}
+
+
+LUALIB_API const char *luaL_checklstring (lua_State *L, int narg, size_t *len) {
+  const char *s = lua_tostring(L, narg);
+  if (!s) tag_error(L, narg, LUA_TSTRING);
+  if (len) *len = lua_strlen(L, narg);
+  return s;
+}
+
+
+LUALIB_API const char *luaL_optlstring (lua_State *L, int narg,
+                                        const char *def, size_t *len) {
+  if (lua_isnoneornil(L, narg)) {
+    if (len)
+      *len = (def ? strlen(def) : 0);
+    return def;
+  }
+  else return luaL_checklstring(L, narg, len);
+}
+
+
+LUALIB_API lua_Number luaL_checknumber (lua_State *L, int narg) {
+  lua_Number d = lua_tonumber(L, narg);
+  if (d == 0 && !lua_isnumber(L, narg))  /* avoid extra test when d is not 0 */
+    tag_error(L, narg, LUA_TNUMBER);
+  return d;
+}
+
+
+LUALIB_API lua_Number luaL_optnumber (lua_State *L, int narg, lua_Number def) {
+  if (lua_isnoneornil(L, narg)) return def;
+  else return luaL_checknumber(L, narg);
+}
+
+
+LUALIB_API int luaL_getmetafield (lua_State *L, int obj, const char *event) {
+  if (!lua_getmetatable(L, obj))  /* no metatable? */
+    return 0;
+  lua_pushstring(L, event);
+  lua_rawget(L, -2);
+  if (lua_isnil(L, -1)) {
+    lua_pop(L, 2);  /* remove metatable and metafield */
+    return 0;
+  }
+  else {
+    lua_remove(L, -2);  /* remove only metatable */
+    return 1;
+  }
+}
+
+
+LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) {
+  obj = abs_index(L, obj);
+  if (!luaL_getmetafield(L, obj, event))  /* no metafield? */
+    return 0;
+  lua_pushvalue(L, obj);
+  lua_call(L, 1, 1);
+  return 1;
+}
+
+
+LUALIB_API void luaL_openlib (lua_State *L, const char *libname,
+                              const luaL_reg *l, int nup) {
+  if (libname) {
+    lua_pushstring(L, libname);
+    lua_gettable(L, LUA_GLOBALSINDEX);  /* check whether lib already exists */
+    if (lua_isnil(L, -1)) {  /* no? */
+      lua_pop(L, 1);
+      lua_newtable(L);  /* create it */
+      lua_pushstring(L, libname);
+      lua_pushvalue(L, -2);
+      lua_settable(L, LUA_GLOBALSINDEX);  /* register it with given name */
+    }
+    lua_insert(L, -(nup+1));  /* move library table to below upvalues */
+  }
+  for (; l->name; l++) {
+    int i;
+    lua_pushstring(L, l->name);
+    for (i=0; i<nup; i++)  /* copy upvalues to the top */
+      lua_pushvalue(L, -(nup+1));
+    lua_pushcclosure(L, l->func, nup);
+    lua_settable(L, -(nup+3));
+  }
+  lua_pop(L, nup);  /* remove upvalues */
+}
+
+
+
+/*
+** {======================================================
+** getn-setn: size for arrays
+** =======================================================
+*/
+
+static int checkint (lua_State *L, int topop) {
+  int n = (int)lua_tonumber(L, -1);
+  if (n == 0 && !lua_isnumber(L, -1)) n = -1;
+  lua_pop(L, topop);
+  return n;
+}
+
+
+static void getsizes (lua_State *L) {
+  lua_rawgeti(L, LUA_REGISTRYINDEX, ARRAYSIZE_REF);
+  if (lua_isnil(L, -1)) {  /* no `size' table? */
+    lua_pop(L, 1);  /* remove nil */
+    lua_newtable(L);  /* create it */
+    lua_pushvalue(L, -1);  /* `size' will be its own metatable */
+    lua_setmetatable(L, -2);
+    lua_pushliteral(L, "__mode");
+    lua_pushliteral(L, "k");
+    lua_rawset(L, -3);  /* metatable(N).__mode = "k" */
+    lua_pushvalue(L, -1);
+    lua_rawseti(L, LUA_REGISTRYINDEX, ARRAYSIZE_REF);  /* store in register */
+  }
+}
+
+
+void luaL_setn (lua_State *L, int t, int n) {
+  t = abs_index(L, t);
+  lua_pushliteral(L, "n");
+  lua_rawget(L, t);
+  if (checkint(L, 1) >= 0) {  /* is there a numeric field `n'? */
+    lua_pushliteral(L, "n");  /* use it */
+    lua_pushnumber(L, (lua_Number)n);
+    lua_rawset(L, t);
+  }
+  else {  /* use `sizes' */
+    getsizes(L);
+    lua_pushvalue(L, t);
+    lua_pushnumber(L, (lua_Number)n);
+    lua_rawset(L, -3);  /* sizes[t] = n */
+    lua_pop(L, 1);  /* remove `sizes' */
+  }
+}
+
+
+int luaL_getn (lua_State *L, int t) {
+  int n;
+  t = abs_index(L, t);
+  lua_pushliteral(L, "n");  /* try t.n */
+  lua_rawget(L, t);
+  if ((n = checkint(L, 1)) >= 0) return n;
+  getsizes(L);  /* else try sizes[t] */
+  lua_pushvalue(L, t);
+  lua_rawget(L, -2);
+  if ((n = checkint(L, 2)) >= 0) return n;
+  for (n = 1; ; n++) {  /* else must count elements */
+    lua_rawgeti(L, t, n);
+    if (lua_isnil(L, -1)) break;
+    lua_pop(L, 1);
+  }
+  lua_pop(L, 1);
+  return n - 1;
+}
+
+/* }====================================================== */
+
+
+
+/*
+** {======================================================
+** Generic Buffer manipulation
+** =======================================================
+*/
+
+
+#define bufflen(B)	((B)->p - (B)->buffer)
+#define bufffree(B)	((size_t)(LUAL_BUFFERSIZE - bufflen(B)))
+
+#define LIMIT	(LUA_MINSTACK/2)
+
+
+static int emptybuffer (luaL_Buffer *B) {
+  size_t l = bufflen(B);
+  if (l == 0) return 0;  /* put nothing on stack */
+  else {
+    lua_pushlstring(B->L, B->buffer, l);
+    B->p = B->buffer;
+    B->lvl++;
+    return 1;
+  }
+}
+
+
+static void adjuststack (luaL_Buffer *B) {
+  if (B->lvl > 1) {
+    lua_State *L = B->L;
+    int toget = 1;  /* number of levels to concat */
+    size_t toplen = lua_strlen(L, -1);
+    do {
+      size_t l = lua_strlen(L, -(toget+1));
+      if (B->lvl - toget + 1 >= LIMIT || toplen > l) {
+        toplen += l;
+        toget++;
+      }
+      else break;
+    } while (toget < B->lvl);
+    lua_concat(L, toget);
+    B->lvl = B->lvl - toget + 1;
+  }
+}
+
+
+LUALIB_API char *luaL_prepbuffer (luaL_Buffer *B) {
+  if (emptybuffer(B))
+    adjuststack(B);
+  return B->buffer;
+}
+
+
+LUALIB_API void luaL_addlstring (luaL_Buffer *B, const char *s, size_t l) {
+  while (l--)
+    luaL_putchar(B, *s++);
+}
+
+
+LUALIB_API void luaL_addstring (luaL_Buffer *B, const char *s) {
+  luaL_addlstring(B, s, strlen(s));
+}
+
+
+LUALIB_API void luaL_pushresult (luaL_Buffer *B) {
+  emptybuffer(B);
+  lua_concat(B->L, B->lvl);
+  B->lvl = 1;
+}
+
+
+LUALIB_API void luaL_addvalue (luaL_Buffer *B) {
+  lua_State *L = B->L;
+  size_t vl = lua_strlen(L, -1);
+  if (vl <= bufffree(B)) {  /* fit into buffer? */
+    memcpy(B->p, lua_tostring(L, -1), vl);  /* put it there */
+    B->p += vl;
+    lua_pop(L, 1);  /* remove from stack */
+  }
+  else {
+    if (emptybuffer(B))
+      lua_insert(L, -2);  /* put buffer before new value */
+    B->lvl++;  /* add new value into B stack */
+    adjuststack(B);
+  }
+}
+
+
+LUALIB_API void luaL_buffinit (lua_State *L, luaL_Buffer *B) {
+  B->L = L;
+  B->p = B->buffer;
+  B->lvl = 0;
+}
+
+/* }====================================================== */
+
+
+LUALIB_API int luaL_ref (lua_State *L, int t) {
+  int ref;
+  t = abs_index(L, t);
+  if (lua_isnil(L, -1)) {
+    lua_pop(L, 1);  /* remove from stack */
+    return LUA_REFNIL;  /* `nil' has a unique fixed reference */
+  }
+  lua_rawgeti(L, t, FREELIST_REF);  /* get first free element */
+  ref = (int)lua_tonumber(L, -1);  /* ref = t[FREELIST_REF] */
+  lua_pop(L, 1);  /* remove it from stack */
+  if (ref != 0) {  /* any free element? */
+    lua_rawgeti(L, t, ref);  /* remove it from list */
+    lua_rawseti(L, t, FREELIST_REF);  /* (t[FREELIST_REF] = t[ref]) */
+  }
+  else {  /* no free elements */
+    ref = luaL_getn(L, t);
+    if (ref < RESERVED_REFS)
+      ref = RESERVED_REFS;  /* skip reserved references */
+    ref++;  /* create new reference */
+    luaL_setn(L, t, ref);
+  }
+  lua_rawseti(L, t, ref);
+  return ref;
+}
+
+
+LUALIB_API void luaL_unref (lua_State *L, int t, int ref) {
+  if (ref >= 0) {
+    t = abs_index(L, t);
+    lua_rawgeti(L, t, FREELIST_REF);
+    lua_rawseti(L, t, ref);  /* t[ref] = t[FREELIST_REF] */
+    lua_pushnumber(L, (lua_Number)ref);
+    lua_rawseti(L, t, FREELIST_REF);  /* t[FREELIST_REF] = ref */
+  }
+}
+
+
+
+/*
+** {======================================================
+** Load functions
+** =======================================================
+*/
+
+typedef struct LoadF {
+  FILE *f;
+  char buff[LUAL_BUFFERSIZE];
+} LoadF;
+
+
+static const char *getF (lua_State *L, void *ud, size_t *size) {
+  LoadF *lf = (LoadF *)ud;
+  (void)L;
+  if (feof(lf->f)) return NULL;
+  *size = fread(lf->buff, 1, LUAL_BUFFERSIZE, lf->f);
+  return (*size > 0) ? lf->buff : NULL;
+}
+
+
+static int errfile (lua_State *L, int fnameindex) {
+  const char *filename = lua_tostring(L, fnameindex) + 1;
+  lua_pushfstring(L, "cannot read %s: %s", filename, strerror(errno));
+  lua_remove(L, fnameindex);
+  return LUA_ERRFILE;
+}
+
+
+LUALIB_API int luaL_loadfile (lua_State *L, const char *filename) {
+  LoadF lf;
+  int status, readstatus;
+  int c;
+  int fnameindex = lua_gettop(L) + 1;  /* index of filename on the stack */
+  if (filename == NULL) {
+    lua_pushliteral(L, "=stdin");
+    lf.f = stdin;
+  }
+  else {
+    lua_pushfstring(L, "@%s", filename);
+    lf.f = fopen(filename, "r");
+  }
+  if (lf.f == NULL) return errfile(L, fnameindex);  /* unable to open file */
+  c = ungetc(getc(lf.f), lf.f);
+  if (!(isspace(c) || isprint(c)) && lf.f != stdin) {  /* binary file? */
+    fclose(lf.f);
+    lf.f = fopen(filename, "rb");  /* reopen in binary mode */
+    if (lf.f == NULL) return errfile(L, fnameindex); /* unable to reopen file */
+  }
+  status = lua_load(L, getF, &lf, lua_tostring(L, -1));
+  readstatus = ferror(lf.f);
+  if (lf.f != stdin) fclose(lf.f);  /* close file (even in case of errors) */
+  if (readstatus) {
+    lua_settop(L, fnameindex);  /* ignore results from `lua_load' */
+    return errfile(L, fnameindex);
+  }
+  lua_remove(L, fnameindex);
+  return status;
+}
+
+
+typedef struct LoadS {
+  const char *s;
+  size_t size;
+} LoadS;
+
+
+static const char *getS (lua_State *L, void *ud, size_t *size) {
+  LoadS *ls = (LoadS *)ud;
+  (void)L;
+  if (ls->size == 0) return NULL;
+  *size = ls->size;
+  ls->size = 0;
+  return ls->s;
+}
+
+
+LUALIB_API int luaL_loadbuffer (lua_State *L, const char *buff, size_t size,
+                                const char *name) {
+  LoadS ls;
+  ls.s = buff;
+  ls.size = size;
+  return lua_load(L, getS, &ls, name);
+}
+
+/* }====================================================== */
+
+
+/*
+** {======================================================
+** compatibility code
+** =======================================================
+*/
+
+
+static void callalert (lua_State *L, int status) {
+  if (status != 0) {
+    lua_getglobal(L, "_ALERT");
+    if (lua_isfunction(L, -1)) {
+      lua_insert(L, -2);
+      lua_call(L, 1, 0);
+    }
+    else {  /* no _ALERT function; print it on stderr */
+      fprintf(stderr, "%s\n", lua_tostring(L, -2));
+      lua_pop(L, 2);  /* remove error message and _ALERT */
+    }
+  }
+}
+
+
+static int aux_do (lua_State *L, int status) {
+  if (status == 0) {  /* parse OK? */
+    status = lua_pcall(L, 0, LUA_MULTRET, 0);  /* call main */
+  }
+  callalert(L, status);
+  return status;
+}
+
+
+LUALIB_API int lua_dofile (lua_State *L, const char *filename) {
+  return aux_do(L, luaL_loadfile(L, filename));
+}
+
+
+LUALIB_API int lua_dobuffer (lua_State *L, const char *buff, size_t size,
+                          const char *name) {
+  return aux_do(L, luaL_loadbuffer(L, buff, size, name));
+}
+
+
+LUALIB_API int lua_dostring (lua_State *L, const char *str) {
+  return lua_dobuffer(L, str, strlen(str), str);
+}
+
+/* }====================================================== */
diff --git a/lib/lua/src/LuaLib/lbaselib.c b/lib/lua/src/LuaLib/lbaselib.c
index 6c928b5..11e5504 100644
--- a/lib/lua/src/LuaLib/lbaselib.c
+++ b/lib/lua/src/LuaLib/lbaselib.c
@@ -1,674 +1,674 @@
-/*

-** $Id: lbaselib.c,v 1.3 2004-11-27 21:35:21 pixel Exp $

-** Basic library

-** See Copyright Notice in lua.h

-*/

-

-

-

-#include <ctype.h>

-#include <stdio.h>

-#include <stdlib.h>

-#include <string.h>

-

-#define lbaselib_c

-

-#include "lua.h"

-

-#include "lauxlib.h"

-#include "lualib.h"

-

-

-

-

-/*

-** If your system does not support `stdout', you can just remove this function.

-** If you need, you can define your own `print' function, following this

-** model but changing `fputs' to put the strings at a proper place

-** (a console window or a log file, for instance).

-*/

-static int luaB_print (lua_State *L) {

-  int n = lua_gettop(L);  /* number of arguments */

-  int i;

-  lua_getglobal(L, "tostring");

-  for (i=1; i<=n; i++) {

-    const char *s;

-    lua_pushvalue(L, -1);  /* function to be called */

-    lua_pushvalue(L, i);   /* value to print */

-    lua_call(L, 1, 1);

-    s = lua_tostring(L, -1);  /* get result */

-    if (s == NULL)

-      return luaL_error(L, "`tostring' must return a string to `print'");

-    if (i>1) fputs("\t", stdout);

-    fputs(s, stdout);

-    lua_pop(L, 1);  /* pop result */

-  }

-  fputs("\n", stdout);

-  return 0;

-}

-

-

-static int luaB_tonumber (lua_State *L) {

-  int base = luaL_optint(L, 2, 10);

-  if (base == 10) {  /* standard conversion */

-    luaL_checkany(L, 1);

-    if (lua_isnumber(L, 1)) {

-      lua_pushnumber(L, lua_tonumber(L, 1));

-      return 1;

-    }

-  }

-  else {

-    const char *s1 = luaL_checkstring(L, 1);

-    char *s2;

-    unsigned long n;

-    luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range");

-    n = strtoul(s1, &s2, base);

-    if (s1 != s2) {  /* at least one valid digit? */

-      while (isspace((unsigned char)(*s2))) s2++;  /* skip trailing spaces */

-      if (*s2 == '\0') {  /* no invalid trailing characters? */

-        lua_pushnumber(L, (lua_Number)n);

-        return 1;

-      }

-    }

-  }

-  lua_pushnil(L);  /* else not a number */

-  return 1;

-}

-

-

-static int luaB_error (lua_State *L) {

-  int level = luaL_optint(L, 2, 1);

-  luaL_checkany(L, 1);

-  if (!lua_isstring(L, 1) || level == 0)

-    lua_pushvalue(L, 1);  /* propagate error message without changes */

-  else {  /* add extra information */

-    luaL_where(L, level);

-    lua_pushvalue(L, 1);

-    lua_concat(L, 2);

-  }

-  return lua_error(L);

-}

-

-

-static int luaB_getmetatable (lua_State *L) {

-  luaL_checkany(L, 1);

-  if (!lua_getmetatable(L, 1)) {

-    lua_pushnil(L);

-    return 1;  /* no metatable */

-  }

-  luaL_getmetafield(L, 1, "__metatable");

-  return 1;  /* returns either __metatable field (if present) or metatable */

-}

-

-

-static int luaB_setmetatable (lua_State *L) {

-  int t = lua_type(L, 2);

-  luaL_checktype(L, 1, LUA_TTABLE);

-  luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2,

-                    "nil or table expected");

-  if (luaL_getmetafield(L, 1, "__metatable"))

-    luaL_error(L, "cannot change a protected metatable");

-  lua_settop(L, 2);

-  lua_setmetatable(L, 1);

-  return 1;

-}

-

-

-static void getfunc (lua_State *L) {

-  if (lua_isfunction(L, 1)) lua_pushvalue(L, 1);

-  else {

-    lua_Debug ar;

-    int level = luaL_optint(L, 1, 1);

-    luaL_argcheck(L, level >= 0, 1, "level must be non-negative");

-    if (lua_getstack(L, level, &ar) == 0)

-      luaL_argerror(L, 1, "invalid level");

-    lua_getinfo(L, "f", &ar);

-    if (lua_isnil(L, -1))

-      luaL_error(L, "no function environment for tail call at level %d",

-                    level);

-  }

-}

-

-

-static int aux_getfenv (lua_State *L) {

-  lua_getfenv(L, -1);

-  lua_pushliteral(L, "__fenv");

-  lua_rawget(L, -2);

-  return !lua_isnil(L, -1);

-}

-

-

-static int luaB_getfenv (lua_State *L) {

-  getfunc(L);

-  if (!aux_getfenv(L))  /* __fenv not defined? */

-    lua_pop(L, 1);  /* remove it, to return real environment */

-  return 1;

-}

-

-

-static int luaB_setfenv (lua_State *L) {

-  luaL_checktype(L, 2, LUA_TTABLE);

-  getfunc(L);

-  if (aux_getfenv(L))  /* __fenv defined? */

-    luaL_error(L, "`setfenv' cannot change a protected environment");

-  else

-    lua_pop(L, 2);  /* remove __fenv and real environment table */

-  lua_pushvalue(L, 2);

-  if (lua_isnumber(L, 1) && lua_tonumber(L, 1) == 0)

-    lua_replace(L, LUA_GLOBALSINDEX);

-  else if (lua_setfenv(L, -2) == 0)

-    luaL_error(L, "`setfenv' cannot change environment of given function");

-  return 0;

-}

-

-

-static int luaB_rawequal (lua_State *L) {

-  luaL_checkany(L, 1);

-  luaL_checkany(L, 2);

-  lua_pushboolean(L, lua_rawequal(L, 1, 2));

-  return 1;

-}

-

-

-static int luaB_rawget (lua_State *L) {

-  luaL_checktype(L, 1, LUA_TTABLE);

-  luaL_checkany(L, 2);

-  lua_rawget(L, 1);

-  return 1;

-}

-

-static int luaB_rawset (lua_State *L) {

-  luaL_checktype(L, 1, LUA_TTABLE);

-  luaL_checkany(L, 2);

-  luaL_checkany(L, 3);

-  lua_rawset(L, 1);

-  return 1;

-}

-

-

-static int luaB_gcinfo (lua_State *L) {

-  lua_pushnumber(L, (lua_Number)lua_getgccount(L));

-  lua_pushnumber(L, (lua_Number)lua_getgcthreshold(L));

-  return 2;

-}

-

-

-static int luaB_collectgarbage (lua_State *L) {

-  lua_setgcthreshold(L, luaL_optint(L, 1, 0));

-  return 0;

-}

-

-

-static int luaB_type (lua_State *L) {

-  luaL_checkany(L, 1);

-  lua_pushstring(L, lua_typename(L, lua_type(L, 1)));

-  return 1;

-}

-

-

-static int luaB_next (lua_State *L) {

-  luaL_checktype(L, 1, LUA_TTABLE);

-  lua_settop(L, 2);  /* create a 2nd argument if there isn't one */

-  if (lua_next(L, 1))

-    return 2;

-  else {

-    lua_pushnil(L);

-    return 1;

-  }

-}

-

-

-static int luaB_pairs (lua_State *L) {

-  luaL_checktype(L, 1, LUA_TTABLE);

-  lua_pushliteral(L, "next");

-  lua_rawget(L, LUA_GLOBALSINDEX);  /* return generator, */

-  lua_pushvalue(L, 1);  /* state, */

-  lua_pushnil(L);  /* and initial value */

-  return 3;

-}

-

-

-static int luaB_ipairs (lua_State *L) {

-  lua_Number i = lua_tonumber(L, 2);

-  luaL_checktype(L, 1, LUA_TTABLE);

-  if (i == 0 && lua_isnone(L, 2)) {  /* `for' start? */

-    lua_pushliteral(L, "ipairs");

-    lua_rawget(L, LUA_GLOBALSINDEX);  /* return generator, */

-    lua_pushvalue(L, 1);  /* state, */

-    lua_pushnumber(L, 0);  /* and initial value */

-    return 3;

-  }

-  else {  /* `for' step */

-    i++;  /* next value */

-    lua_pushnumber(L, i);

-    lua_rawgeti(L, 1, (int)i);

-    return (lua_isnil(L, -1)) ? 0 : 2;

-  }

-}

-

-

-static int load_aux (lua_State *L, int status) {

-  if (status == 0)  /* OK? */

-    return 1;

-  else {

-    lua_pushnil(L);

-    lua_insert(L, -2);  /* put before error message */

-    return 2;  /* return nil plus error message */

-  }

-}

-

-

-static int luaB_loadstring (lua_State *L) {

-  size_t l;

-  const char *s = luaL_checklstring(L, 1, &l);

-  const char *chunkname = luaL_optstring(L, 2, s);

-  return load_aux(L, luaL_loadbuffer(L, s, l, chunkname));

-}

-

-

-static int luaB_loadfile (lua_State *L) {

-  const char *fname = luaL_optstring(L, 1, NULL);

-  return load_aux(L, luaL_loadfile(L, fname));

-}

-

-

-static int luaB_dofile (lua_State *L) {

-  const char *fname = luaL_optstring(L, 1, NULL);

-  int status = luaL_loadfile(L, fname);

-  if (status != 0) lua_error(L);

-  lua_call(L, 0, LUA_MULTRET);

-  return lua_gettop(L) - 1;

-}

-

-

-static int luaB_assert (lua_State *L) {

-  luaL_checkany(L, 1);

-  if (!lua_toboolean(L, 1))

-    return luaL_error(L, "%s", luaL_optstring(L, 2, "assertion failed!"));

-  lua_settop(L, 1);

-  return 1;

-}

-

-

-static int luaB_unpack (lua_State *L) {

-  int n, i;

-  luaL_checktype(L, 1, LUA_TTABLE);

-  n = luaL_getn(L, 1);

-  luaL_checkstack(L, n, "table too big to unpack");

-  for (i=1; i<=n; i++)  /* push arg[1...n] */

-    lua_rawgeti(L, 1, i);

-  return n;

-}

-

-

-static int luaB_pcall (lua_State *L) {

-  int status;

-  luaL_checkany(L, 1);

-  status = lua_pcall(L, lua_gettop(L) - 1, LUA_MULTRET, 0);

-  lua_pushboolean(L, (status == 0));

-  lua_insert(L, 1);

-  return lua_gettop(L);  /* return status + all results */

-}

-

-

-static int luaB_xpcall (lua_State *L) {

-  int status;

-  luaL_checkany(L, 2);

-  lua_settop(L, 2);

-  lua_insert(L, 1);  /* put error function under function to be called */

-  status = lua_pcall(L, 0, LUA_MULTRET, 1);

-  lua_pushboolean(L, (status == 0));

-  lua_replace(L, 1);

-  return lua_gettop(L);  /* return status + all results */

-}

-

-

-static int luaB_tostring (lua_State *L) {

-  char buff[64];

-  luaL_checkany(L, 1);

-  if (luaL_callmeta(L, 1, "__tostring"))  /* is there a metafield? */

-    return 1;  /* use its value */

-  switch (lua_type(L, 1)) {

-    case LUA_TNUMBER:

-      lua_pushstring(L, lua_tostring(L, 1));

-      return 1;

-    case LUA_TSTRING:

-      lua_pushvalue(L, 1);

-      return 1;

-    case LUA_TBOOLEAN:

-      lua_pushstring(L, (lua_toboolean(L, 1) ? "true" : "false"));

-      return 1;

-    case LUA_TTABLE:

-      sprintf(buff, "table: %p", lua_topointer(L, 1));

-      break;

-    case LUA_TFUNCTION:

-      sprintf(buff, "function: %p", lua_topointer(L, 1));

-      break;

-    case LUA_TUSERDATA:

-    case LUA_TLIGHTUSERDATA:

-      sprintf(buff, "userdata: %p", lua_touserdata(L, 1));

-      break;

-    case LUA_TTHREAD:

-      sprintf(buff, "thread: %p", (void *)lua_tothread(L, 1));

-      break;

-    case LUA_TNIL:

-      lua_pushliteral(L, "nil");

-      return 1;

-  }

-  lua_pushstring(L, buff);

-  return 1;

-}

-

-

-static int luaB_newproxy (lua_State *L) {

-  lua_settop(L, 1);

-  lua_newuserdata(L, 0);  /* create proxy */

-  if (lua_toboolean(L, 1) == 0)

-    return 1;  /* no metatable */

-  else if (lua_isboolean(L, 1)) {

-    lua_newtable(L);  /* create a new metatable `m' ... */

-    lua_pushvalue(L, -1);  /* ... and mark `m' as a valid metatable */

-    lua_pushboolean(L, 1);

-    lua_rawset(L, lua_upvalueindex(1));  /* weaktable[m] = true */

-  }

-  else {

-    int validproxy = 0;  /* to check if weaktable[metatable(u)] == true */

-    if (lua_getmetatable(L, 1)) {

-      lua_rawget(L, lua_upvalueindex(1));

-      validproxy = lua_toboolean(L, -1);

-      lua_pop(L, 1);  /* remove value */

-    }

-    luaL_argcheck(L, validproxy, 1, "boolean or proxy expected");

-    lua_getmetatable(L, 1);  /* metatable is valid; get it */

-  }

-  lua_setmetatable(L, 2);

-  return 1;

-}

-

-

-/*

-** {======================================================

-** `require' function

-** =======================================================

-*/

-

-

-/* name of global that holds table with loaded packages */

-#define REQTAB		"_LOADED"

-

-/* name of global that holds the search path for packages */

-#define LUA_PATH	"LUA_PATH"

-

-#ifndef LUA_PATH_SEP

-#define LUA_PATH_SEP	';'

-#endif

-

-#ifndef LUA_PATH_MARK

-#define LUA_PATH_MARK	'?'

-#endif

-

-#ifndef LUA_PATH_DEFAULT

-#define LUA_PATH_DEFAULT	"?;?.lua"

-#endif

-

-

-static const char *getpath (lua_State *L) {

-  const char *path;

-  lua_getglobal(L, LUA_PATH);  /* try global variable */

-  path = lua_tostring(L, -1);

-  lua_pop(L, 1);

-  if (path) return path;

-  path = getenv(LUA_PATH);  /* else try environment variable */

-  if (path) return path;

-  return LUA_PATH_DEFAULT;  /* else use default */

-}

-

-

-static const char *pushnextpath (lua_State *L, const char *path) {

-  const char *l;

-  if (*path == '\0') return NULL;  /* no more paths */

-  if (*path == LUA_PATH_SEP) path++;  /* skip separator */

-  l = strchr(path, LUA_PATH_SEP);  /* find next separator */

-  if (l == NULL) l = path+strlen(path);

-  lua_pushlstring(L, path, l - path);  /* directory name */

-  return l;

-}

-

-

-static void pushcomposename (lua_State *L) {

-  const char *path = lua_tostring(L, -1);

-  const char *wild;

-  int n = 1;

-  while ((wild = strchr(path, LUA_PATH_MARK)) != NULL) {

-    /* is there stack space for prefix, name, and eventual last sufix? */

-    luaL_checkstack(L, 3, "too many marks in a path component");

-    lua_pushlstring(L, path, wild - path);  /* push prefix */

-    lua_pushvalue(L, 1);  /* push package name (in place of MARK) */

-    path = wild + 1;  /* continue after MARK */

-    n += 2;

-  }

-  lua_pushstring(L, path);  /* push last sufix (`n' already includes this) */

-  lua_concat(L, n);

-}

-

-

-static int luaB_require (lua_State *L) {

-  const char *path;

-  int status = LUA_ERRFILE;  /* not found (yet) */

-  luaL_checkstring(L, 1);

-  lua_settop(L, 1);

-  lua_getglobal(L, REQTAB);

-  if (!lua_istable(L, 2)) return luaL_error(L, "`" REQTAB "' is not a table");

-  path = getpath(L);

-  lua_pushvalue(L, 1);  /* check package's name in book-keeping table */

-  lua_rawget(L, 2);

-  if (lua_toboolean(L, -1))  /* is it there? */

-    return 1;  /* package is already loaded; return its result */

-  else {  /* must load it */

-    while (status == LUA_ERRFILE) {

-      lua_settop(L, 3);  /* reset stack position */

-      if ((path = pushnextpath(L, path)) == NULL) break;

-      pushcomposename(L);

-      status = luaL_loadfile(L, lua_tostring(L, -1));  /* try to load it */

-    }

-  }

-  switch (status) {

-    case 0: {

-      lua_getglobal(L, "_REQUIREDNAME");  /* save previous name */

-      lua_insert(L, -2);  /* put it below function */

-      lua_pushvalue(L, 1);

-      lua_setglobal(L, "_REQUIREDNAME");  /* set new name */

-      lua_call(L, 0, 1);  /* run loaded module */

-      lua_insert(L, -2);  /* put result below previous name */

-      lua_setglobal(L, "_REQUIREDNAME");  /* reset to previous name */

-      if (lua_isnil(L, -1)) {  /* no/nil return? */

-        lua_pushboolean(L, 1);

-        lua_replace(L, -2);  /* replace to true */

-      }

-      lua_pushvalue(L, 1);

-      lua_pushvalue(L, -2);

-      lua_rawset(L, 2);  /* mark it as loaded */

-      return 1;  /* return value */

-    }

-    case LUA_ERRFILE: {  /* file not found */

-      return luaL_error(L, "could not load package `%s' from path `%s'",

-                            lua_tostring(L, 1), getpath(L));

-    }

-    default: {

-      return luaL_error(L, "error loading package `%s' (%s)",

-                           lua_tostring(L, 1), lua_tostring(L, -1));

-    }

-  }

-}

-

-/* }====================================================== */

-

-

-static const luaL_reg base_funcs[] = {

-  {"error", luaB_error},

-  {"getmetatable", luaB_getmetatable},

-  {"setmetatable", luaB_setmetatable},

-  {"getfenv", luaB_getfenv},

-  {"setfenv", luaB_setfenv},

-  {"next", luaB_next},

-  {"ipairs", luaB_ipairs},

-  {"pairs", luaB_pairs},

-  {"print", luaB_print},

-  {"tonumber", luaB_tonumber},

-  {"tostring", luaB_tostring},

-  {"type", luaB_type},

-  {"assert", luaB_assert},

-  {"unpack", luaB_unpack},

-  {"rawequal", luaB_rawequal},

-  {"rawget", luaB_rawget},

-  {"rawset", luaB_rawset},

-  {"pcall", luaB_pcall},

-  {"xpcall", luaB_xpcall},

-  {"collectgarbage", luaB_collectgarbage},

-  {"gcinfo", luaB_gcinfo},

-  {"loadfile", luaB_loadfile},

-  {"dofile", luaB_dofile},

-  {"loadstring", luaB_loadstring},

-  {"require", luaB_require},

-  {NULL, NULL}

-};

-

-

-/*

-** {======================================================

-** Coroutine library

-** =======================================================

-*/

-

-static int auxresume (lua_State *L, lua_State *co, int narg) {

-  int status;

-  if (!lua_checkstack(co, narg))

-    luaL_error(L, "too many arguments to resume");

-  lua_xmove(L, co, narg);

-  status = lua_resume(co, narg);

-  if (status == 0) {

-    int nres = lua_gettop(co);

-    if (!lua_checkstack(L, nres))

-      luaL_error(L, "too many results to resume");

-    lua_xmove(co, L, nres);  /* move yielded values */

-    return nres;

-  }

-  else {

-    lua_xmove(co, L, 1);  /* move error message */

-    return -1;  /* error flag */

-  }

-}

-

-

-static int luaB_coresume (lua_State *L) {

-  lua_State *co = lua_tothread(L, 1);

-  int r;

-  luaL_argcheck(L, co, 1, "coroutine expected");

-  r = auxresume(L, co, lua_gettop(L) - 1);

-  if (r < 0) {

-    lua_pushboolean(L, 0);

-    lua_insert(L, -2);

-    return 2;  /* return false + error message */

-  }

-  else {

-    lua_pushboolean(L, 1);

-    lua_insert(L, -(r + 1));

-    return r + 1;  /* return true + `resume' returns */

-  }

-}

-

-

-static int luaB_auxwrap (lua_State *L) {

-  lua_State *co = lua_tothread(L, lua_upvalueindex(1));

-  int r = auxresume(L, co, lua_gettop(L));

-  if (r < 0) {

-    if (lua_isstring(L, -1)) {  /* error object is a string? */

-      luaL_where(L, 1);  /* add extra info */

-      lua_insert(L, -2);

-      lua_concat(L, 2);

-    }

-    lua_error(L);  /* propagate error */

-  }

-  return r;

-}

-

-

-static int luaB_cocreate (lua_State *L) {

-  lua_State *NL = lua_newthread(L);

-  luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), 1,

-    "Lua function expected");

-  lua_pushvalue(L, 1);  /* move function to top */

-  lua_xmove(L, NL, 1);  /* move function from L to NL */

-  return 1;

-}

-

-

-static int luaB_cowrap (lua_State *L) {

-  luaB_cocreate(L);

-  lua_pushcclosure(L, luaB_auxwrap, 1);

-  return 1;

-}

-

-

-static int luaB_yield (lua_State *L) {

-  return lua_yield(L, lua_gettop(L));

-}

-

-

-static int luaB_costatus (lua_State *L) {

-  lua_State *co = lua_tothread(L, 1);

-  luaL_argcheck(L, co, 1, "coroutine expected");

-  if (L == co) lua_pushliteral(L, "running");

-  else {

-    lua_Debug ar;

-    if (lua_getstack(co, 0, &ar) == 0 && lua_gettop(co) == 0)

-      lua_pushliteral(L, "dead");

-    else

-      lua_pushliteral(L, "suspended");

-  }

-  return 1;

-}

-

-

-static const luaL_reg co_funcs[] = {

-  {"create", luaB_cocreate},

-  {"wrap", luaB_cowrap},

-  {"resume", luaB_coresume},

-  {"yield", luaB_yield},

-  {"status", luaB_costatus},

-  {NULL, NULL}

-};

-

-/* }====================================================== */

-

-

-

-static void base_open (lua_State *L) {

-  lua_pushliteral(L, "_G");

-  lua_pushvalue(L, LUA_GLOBALSINDEX);

-  luaL_openlib(L, NULL, base_funcs, 0);  /* open lib into global table */

-  lua_pushliteral(L, "_VERSION");

-  lua_pushliteral(L, LUA_VERSION);

-  lua_rawset(L, -3);  /* set global _VERSION */

-  /* `newproxy' needs a weaktable as upvalue */

-  lua_pushliteral(L, "newproxy");

-  lua_newtable(L);  /* new table `w' */

-  lua_pushvalue(L, -1);  /* `w' will be its own metatable */

-  lua_setmetatable(L, -2);

-  lua_pushliteral(L, "__mode");

-  lua_pushliteral(L, "k");

-  lua_rawset(L, -3);  /* metatable(w).__mode = "k" */

-  lua_pushcclosure(L, luaB_newproxy, 1);

-  lua_rawset(L, -3);  /* set global `newproxy' */

-  lua_rawset(L, -1);  /* set global _G */

-}

-

-

-LUALIB_API int luaopen_base (lua_State *L) {

-  base_open(L);

-  luaL_openlib(L, LUA_COLIBNAME, co_funcs, 0);

-  lua_newtable(L);

-  lua_setglobal(L, REQTAB);

-  return 0;

-}

-

+/*
+** $Id: lbaselib.c,v 1.4 2004-11-27 21:46:10 pixel Exp $
+** Basic library
+** See Copyright Notice in lua.h
+*/
+
+
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define lbaselib_c
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+
+
+/*
+** If your system does not support `stdout', you can just remove this function.
+** If you need, you can define your own `print' function, following this
+** model but changing `fputs' to put the strings at a proper place
+** (a console window or a log file, for instance).
+*/
+static int luaB_print (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  int i;
+  lua_getglobal(L, "tostring");
+  for (i=1; i<=n; i++) {
+    const char *s;
+    lua_pushvalue(L, -1);  /* function to be called */
+    lua_pushvalue(L, i);   /* value to print */
+    lua_call(L, 1, 1);
+    s = lua_tostring(L, -1);  /* get result */
+    if (s == NULL)
+      return luaL_error(L, "`tostring' must return a string to `print'");
+    if (i>1) fputs("\t", stdout);
+    fputs(s, stdout);
+    lua_pop(L, 1);  /* pop result */
+  }
+  fputs("\n", stdout);
+  return 0;
+}
+
+
+static int luaB_tonumber (lua_State *L) {
+  int base = luaL_optint(L, 2, 10);
+  if (base == 10) {  /* standard conversion */
+    luaL_checkany(L, 1);
+    if (lua_isnumber(L, 1)) {
+      lua_pushnumber(L, lua_tonumber(L, 1));
+      return 1;
+    }
+  }
+  else {
+    const char *s1 = luaL_checkstring(L, 1);
+    char *s2;
+    unsigned long n;
+    luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range");
+    n = strtoul(s1, &s2, base);
+    if (s1 != s2) {  /* at least one valid digit? */
+      while (isspace((unsigned char)(*s2))) s2++;  /* skip trailing spaces */
+      if (*s2 == '\0') {  /* no invalid trailing characters? */
+        lua_pushnumber(L, (lua_Number)n);
+        return 1;
+      }
+    }
+  }
+  lua_pushnil(L);  /* else not a number */
+  return 1;
+}
+
+
+static int luaB_error (lua_State *L) {
+  int level = luaL_optint(L, 2, 1);
+  luaL_checkany(L, 1);
+  if (!lua_isstring(L, 1) || level == 0)
+    lua_pushvalue(L, 1);  /* propagate error message without changes */
+  else {  /* add extra information */
+    luaL_where(L, level);
+    lua_pushvalue(L, 1);
+    lua_concat(L, 2);
+  }
+  return lua_error(L);
+}
+
+
+static int luaB_getmetatable (lua_State *L) {
+  luaL_checkany(L, 1);
+  if (!lua_getmetatable(L, 1)) {
+    lua_pushnil(L);
+    return 1;  /* no metatable */
+  }
+  luaL_getmetafield(L, 1, "__metatable");
+  return 1;  /* returns either __metatable field (if present) or metatable */
+}
+
+
+static int luaB_setmetatable (lua_State *L) {
+  int t = lua_type(L, 2);
+  luaL_checktype(L, 1, LUA_TTABLE);
+  luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2,
+                    "nil or table expected");
+  if (luaL_getmetafield(L, 1, "__metatable"))
+    luaL_error(L, "cannot change a protected metatable");
+  lua_settop(L, 2);
+  lua_setmetatable(L, 1);
+  return 1;
+}
+
+
+static void getfunc (lua_State *L) {
+  if (lua_isfunction(L, 1)) lua_pushvalue(L, 1);
+  else {
+    lua_Debug ar;
+    int level = luaL_optint(L, 1, 1);
+    luaL_argcheck(L, level >= 0, 1, "level must be non-negative");
+    if (lua_getstack(L, level, &ar) == 0)
+      luaL_argerror(L, 1, "invalid level");
+    lua_getinfo(L, "f", &ar);
+    if (lua_isnil(L, -1))
+      luaL_error(L, "no function environment for tail call at level %d",
+                    level);
+  }
+}
+
+
+static int aux_getfenv (lua_State *L) {
+  lua_getfenv(L, -1);
+  lua_pushliteral(L, "__fenv");
+  lua_rawget(L, -2);
+  return !lua_isnil(L, -1);
+}
+
+
+static int luaB_getfenv (lua_State *L) {
+  getfunc(L);
+  if (!aux_getfenv(L))  /* __fenv not defined? */
+    lua_pop(L, 1);  /* remove it, to return real environment */
+  return 1;
+}
+
+
+static int luaB_setfenv (lua_State *L) {
+  luaL_checktype(L, 2, LUA_TTABLE);
+  getfunc(L);
+  if (aux_getfenv(L))  /* __fenv defined? */
+    luaL_error(L, "`setfenv' cannot change a protected environment");
+  else
+    lua_pop(L, 2);  /* remove __fenv and real environment table */
+  lua_pushvalue(L, 2);
+  if (lua_isnumber(L, 1) && lua_tonumber(L, 1) == 0)
+    lua_replace(L, LUA_GLOBALSINDEX);
+  else if (lua_setfenv(L, -2) == 0)
+    luaL_error(L, "`setfenv' cannot change environment of given function");
+  return 0;
+}
+
+
+static int luaB_rawequal (lua_State *L) {
+  luaL_checkany(L, 1);
+  luaL_checkany(L, 2);
+  lua_pushboolean(L, lua_rawequal(L, 1, 2));
+  return 1;
+}
+
+
+static int luaB_rawget (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  luaL_checkany(L, 2);
+  lua_rawget(L, 1);
+  return 1;
+}
+
+static int luaB_rawset (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  luaL_checkany(L, 2);
+  luaL_checkany(L, 3);
+  lua_rawset(L, 1);
+  return 1;
+}
+
+
+static int luaB_gcinfo (lua_State *L) {
+  lua_pushnumber(L, (lua_Number)lua_getgccount(L));
+  lua_pushnumber(L, (lua_Number)lua_getgcthreshold(L));
+  return 2;
+}
+
+
+static int luaB_collectgarbage (lua_State *L) {
+  lua_setgcthreshold(L, luaL_optint(L, 1, 0));
+  return 0;
+}
+
+
+static int luaB_type (lua_State *L) {
+  luaL_checkany(L, 1);
+  lua_pushstring(L, lua_typename(L, lua_type(L, 1)));
+  return 1;
+}
+
+
+static int luaB_next (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  lua_settop(L, 2);  /* create a 2nd argument if there isn't one */
+  if (lua_next(L, 1))
+    return 2;
+  else {
+    lua_pushnil(L);
+    return 1;
+  }
+}
+
+
+static int luaB_pairs (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  lua_pushliteral(L, "next");
+  lua_rawget(L, LUA_GLOBALSINDEX);  /* return generator, */
+  lua_pushvalue(L, 1);  /* state, */
+  lua_pushnil(L);  /* and initial value */
+  return 3;
+}
+
+
+static int luaB_ipairs (lua_State *L) {
+  lua_Number i = lua_tonumber(L, 2);
+  luaL_checktype(L, 1, LUA_TTABLE);
+  if (i == 0 && lua_isnone(L, 2)) {  /* `for' start? */
+    lua_pushliteral(L, "ipairs");
+    lua_rawget(L, LUA_GLOBALSINDEX);  /* return generator, */
+    lua_pushvalue(L, 1);  /* state, */
+    lua_pushnumber(L, 0);  /* and initial value */
+    return 3;
+  }
+  else {  /* `for' step */
+    i++;  /* next value */
+    lua_pushnumber(L, i);
+    lua_rawgeti(L, 1, (int)i);
+    return (lua_isnil(L, -1)) ? 0 : 2;
+  }
+}
+
+
+static int load_aux (lua_State *L, int status) {
+  if (status == 0)  /* OK? */
+    return 1;
+  else {
+    lua_pushnil(L);
+    lua_insert(L, -2);  /* put before error message */
+    return 2;  /* return nil plus error message */
+  }
+}
+
+
+static int luaB_loadstring (lua_State *L) {
+  size_t l;
+  const char *s = luaL_checklstring(L, 1, &l);
+  const char *chunkname = luaL_optstring(L, 2, s);
+  return load_aux(L, luaL_loadbuffer(L, s, l, chunkname));
+}
+
+
+static int luaB_loadfile (lua_State *L) {
+  const char *fname = luaL_optstring(L, 1, NULL);
+  return load_aux(L, luaL_loadfile(L, fname));
+}
+
+
+static int luaB_dofile (lua_State *L) {
+  const char *fname = luaL_optstring(L, 1, NULL);
+  int status = luaL_loadfile(L, fname);
+  if (status != 0) lua_error(L);
+  lua_call(L, 0, LUA_MULTRET);
+  return lua_gettop(L) - 1;
+}
+
+
+static int luaB_assert (lua_State *L) {
+  luaL_checkany(L, 1);
+  if (!lua_toboolean(L, 1))
+    return luaL_error(L, "%s", luaL_optstring(L, 2, "assertion failed!"));
+  lua_settop(L, 1);
+  return 1;
+}
+
+
+static int luaB_unpack (lua_State *L) {
+  int n, i;
+  luaL_checktype(L, 1, LUA_TTABLE);
+  n = luaL_getn(L, 1);
+  luaL_checkstack(L, n, "table too big to unpack");
+  for (i=1; i<=n; i++)  /* push arg[1...n] */
+    lua_rawgeti(L, 1, i);
+  return n;
+}
+
+
+static int luaB_pcall (lua_State *L) {
+  int status;
+  luaL_checkany(L, 1);
+  status = lua_pcall(L, lua_gettop(L) - 1, LUA_MULTRET, 0);
+  lua_pushboolean(L, (status == 0));
+  lua_insert(L, 1);
+  return lua_gettop(L);  /* return status + all results */
+}
+
+
+static int luaB_xpcall (lua_State *L) {
+  int status;
+  luaL_checkany(L, 2);
+  lua_settop(L, 2);
+  lua_insert(L, 1);  /* put error function under function to be called */
+  status = lua_pcall(L, 0, LUA_MULTRET, 1);
+  lua_pushboolean(L, (status == 0));
+  lua_replace(L, 1);
+  return lua_gettop(L);  /* return status + all results */
+}
+
+
+static int luaB_tostring (lua_State *L) {
+  char buff[64];
+  luaL_checkany(L, 1);
+  if (luaL_callmeta(L, 1, "__tostring"))  /* is there a metafield? */
+    return 1;  /* use its value */
+  switch (lua_type(L, 1)) {
+    case LUA_TNUMBER:
+      lua_pushstring(L, lua_tostring(L, 1));
+      return 1;
+    case LUA_TSTRING:
+      lua_pushvalue(L, 1);
+      return 1;
+    case LUA_TBOOLEAN:
+      lua_pushstring(L, (lua_toboolean(L, 1) ? "true" : "false"));
+      return 1;
+    case LUA_TTABLE:
+      sprintf(buff, "table: %p", lua_topointer(L, 1));
+      break;
+    case LUA_TFUNCTION:
+      sprintf(buff, "function: %p", lua_topointer(L, 1));
+      break;
+    case LUA_TUSERDATA:
+    case LUA_TLIGHTUSERDATA:
+      sprintf(buff, "userdata: %p", lua_touserdata(L, 1));
+      break;
+    case LUA_TTHREAD:
+      sprintf(buff, "thread: %p", (void *)lua_tothread(L, 1));
+      break;
+    case LUA_TNIL:
+      lua_pushliteral(L, "nil");
+      return 1;
+  }
+  lua_pushstring(L, buff);
+  return 1;
+}
+
+
+static int luaB_newproxy (lua_State *L) {
+  lua_settop(L, 1);
+  lua_newuserdata(L, 0);  /* create proxy */
+  if (lua_toboolean(L, 1) == 0)
+    return 1;  /* no metatable */
+  else if (lua_isboolean(L, 1)) {
+    lua_newtable(L);  /* create a new metatable `m' ... */
+    lua_pushvalue(L, -1);  /* ... and mark `m' as a valid metatable */
+    lua_pushboolean(L, 1);
+    lua_rawset(L, lua_upvalueindex(1));  /* weaktable[m] = true */
+  }
+  else {
+    int validproxy = 0;  /* to check if weaktable[metatable(u)] == true */
+    if (lua_getmetatable(L, 1)) {
+      lua_rawget(L, lua_upvalueindex(1));
+      validproxy = lua_toboolean(L, -1);
+      lua_pop(L, 1);  /* remove value */
+    }
+    luaL_argcheck(L, validproxy, 1, "boolean or proxy expected");
+    lua_getmetatable(L, 1);  /* metatable is valid; get it */
+  }
+  lua_setmetatable(L, 2);
+  return 1;
+}
+
+
+/*
+** {======================================================
+** `require' function
+** =======================================================
+*/
+
+
+/* name of global that holds table with loaded packages */
+#define REQTAB		"_LOADED"
+
+/* name of global that holds the search path for packages */
+#define LUA_PATH	"LUA_PATH"
+
+#ifndef LUA_PATH_SEP
+#define LUA_PATH_SEP	';'
+#endif
+
+#ifndef LUA_PATH_MARK
+#define LUA_PATH_MARK	'?'
+#endif
+
+#ifndef LUA_PATH_DEFAULT
+#define LUA_PATH_DEFAULT	"?;?.lua"
+#endif
+
+
+static const char *getpath (lua_State *L) {
+  const char *path;
+  lua_getglobal(L, LUA_PATH);  /* try global variable */
+  path = lua_tostring(L, -1);
+  lua_pop(L, 1);
+  if (path) return path;
+  path = getenv(LUA_PATH);  /* else try environment variable */
+  if (path) return path;
+  return LUA_PATH_DEFAULT;  /* else use default */
+}
+
+
+static const char *pushnextpath (lua_State *L, const char *path) {
+  const char *l;
+  if (*path == '\0') return NULL;  /* no more paths */
+  if (*path == LUA_PATH_SEP) path++;  /* skip separator */
+  l = strchr(path, LUA_PATH_SEP);  /* find next separator */
+  if (l == NULL) l = path+strlen(path);
+  lua_pushlstring(L, path, l - path);  /* directory name */
+  return l;
+}
+
+
+static void pushcomposename (lua_State *L) {
+  const char *path = lua_tostring(L, -1);
+  const char *wild;
+  int n = 1;
+  while ((wild = strchr(path, LUA_PATH_MARK)) != NULL) {
+    /* is there stack space for prefix, name, and eventual last sufix? */
+    luaL_checkstack(L, 3, "too many marks in a path component");
+    lua_pushlstring(L, path, wild - path);  /* push prefix */
+    lua_pushvalue(L, 1);  /* push package name (in place of MARK) */
+    path = wild + 1;  /* continue after MARK */
+    n += 2;
+  }
+  lua_pushstring(L, path);  /* push last sufix (`n' already includes this) */
+  lua_concat(L, n);
+}
+
+
+static int luaB_require (lua_State *L) {
+  const char *path;
+  int status = LUA_ERRFILE;  /* not found (yet) */
+  luaL_checkstring(L, 1);
+  lua_settop(L, 1);
+  lua_getglobal(L, REQTAB);
+  if (!lua_istable(L, 2)) return luaL_error(L, "`" REQTAB "' is not a table");
+  path = getpath(L);
+  lua_pushvalue(L, 1);  /* check package's name in book-keeping table */
+  lua_rawget(L, 2);
+  if (lua_toboolean(L, -1))  /* is it there? */
+    return 1;  /* package is already loaded; return its result */
+  else {  /* must load it */
+    while (status == LUA_ERRFILE) {
+      lua_settop(L, 3);  /* reset stack position */
+      if ((path = pushnextpath(L, path)) == NULL) break;
+      pushcomposename(L);
+      status = luaL_loadfile(L, lua_tostring(L, -1));  /* try to load it */
+    }
+  }
+  switch (status) {
+    case 0: {
+      lua_getglobal(L, "_REQUIREDNAME");  /* save previous name */
+      lua_insert(L, -2);  /* put it below function */
+      lua_pushvalue(L, 1);
+      lua_setglobal(L, "_REQUIREDNAME");  /* set new name */
+      lua_call(L, 0, 1);  /* run loaded module */
+      lua_insert(L, -2);  /* put result below previous name */
+      lua_setglobal(L, "_REQUIREDNAME");  /* reset to previous name */
+      if (lua_isnil(L, -1)) {  /* no/nil return? */
+        lua_pushboolean(L, 1);
+        lua_replace(L, -2);  /* replace to true */
+      }
+      lua_pushvalue(L, 1);
+      lua_pushvalue(L, -2);
+      lua_rawset(L, 2);  /* mark it as loaded */
+      return 1;  /* return value */
+    }
+    case LUA_ERRFILE: {  /* file not found */
+      return luaL_error(L, "could not load package `%s' from path `%s'",
+                            lua_tostring(L, 1), getpath(L));
+    }
+    default: {
+      return luaL_error(L, "error loading package `%s' (%s)",
+                           lua_tostring(L, 1), lua_tostring(L, -1));
+    }
+  }
+}
+
+/* }====================================================== */
+
+
+static const luaL_reg base_funcs[] = {
+  {"error", luaB_error},
+  {"getmetatable", luaB_getmetatable},
+  {"setmetatable", luaB_setmetatable},
+  {"getfenv", luaB_getfenv},
+  {"setfenv", luaB_setfenv},
+  {"next", luaB_next},
+  {"ipairs", luaB_ipairs},
+  {"pairs", luaB_pairs},
+  {"print", luaB_print},
+  {"tonumber", luaB_tonumber},
+  {"tostring", luaB_tostring},
+  {"type", luaB_type},
+  {"assert", luaB_assert},
+  {"unpack", luaB_unpack},
+  {"rawequal", luaB_rawequal},
+  {"rawget", luaB_rawget},
+  {"rawset", luaB_rawset},
+  {"pcall", luaB_pcall},
+  {"xpcall", luaB_xpcall},
+  {"collectgarbage", luaB_collectgarbage},
+  {"gcinfo", luaB_gcinfo},
+  {"loadfile", luaB_loadfile},
+  {"dofile", luaB_dofile},
+  {"loadstring", luaB_loadstring},
+  {"require", luaB_require},
+  {NULL, NULL}
+};
+
+
+/*
+** {======================================================
+** Coroutine library
+** =======================================================
+*/
+
+static int auxresume (lua_State *L, lua_State *co, int narg) {
+  int status;
+  if (!lua_checkstack(co, narg))
+    luaL_error(L, "too many arguments to resume");
+  lua_xmove(L, co, narg);
+  status = lua_resume(co, narg);
+  if (status == 0) {
+    int nres = lua_gettop(co);
+    if (!lua_checkstack(L, nres))
+      luaL_error(L, "too many results to resume");
+    lua_xmove(co, L, nres);  /* move yielded values */
+    return nres;
+  }
+  else {
+    lua_xmove(co, L, 1);  /* move error message */
+    return -1;  /* error flag */
+  }
+}
+
+
+static int luaB_coresume (lua_State *L) {
+  lua_State *co = lua_tothread(L, 1);
+  int r;
+  luaL_argcheck(L, co, 1, "coroutine expected");
+  r = auxresume(L, co, lua_gettop(L) - 1);
+  if (r < 0) {
+    lua_pushboolean(L, 0);
+    lua_insert(L, -2);
+    return 2;  /* return false + error message */
+  }
+  else {
+    lua_pushboolean(L, 1);
+    lua_insert(L, -(r + 1));
+    return r + 1;  /* return true + `resume' returns */
+  }
+}
+
+
+static int luaB_auxwrap (lua_State *L) {
+  lua_State *co = lua_tothread(L, lua_upvalueindex(1));
+  int r = auxresume(L, co, lua_gettop(L));
+  if (r < 0) {
+    if (lua_isstring(L, -1)) {  /* error object is a string? */
+      luaL_where(L, 1);  /* add extra info */
+      lua_insert(L, -2);
+      lua_concat(L, 2);
+    }
+    lua_error(L);  /* propagate error */
+  }
+  return r;
+}
+
+
+static int luaB_cocreate (lua_State *L) {
+  lua_State *NL = lua_newthread(L);
+  luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), 1,
+    "Lua function expected");
+  lua_pushvalue(L, 1);  /* move function to top */
+  lua_xmove(L, NL, 1);  /* move function from L to NL */
+  return 1;
+}
+
+
+static int luaB_cowrap (lua_State *L) {
+  luaB_cocreate(L);
+  lua_pushcclosure(L, luaB_auxwrap, 1);
+  return 1;
+}
+
+
+static int luaB_yield (lua_State *L) {
+  return lua_yield(L, lua_gettop(L));
+}
+
+
+static int luaB_costatus (lua_State *L) {
+  lua_State *co = lua_tothread(L, 1);
+  luaL_argcheck(L, co, 1, "coroutine expected");
+  if (L == co) lua_pushliteral(L, "running");
+  else {
+    lua_Debug ar;
+    if (lua_getstack(co, 0, &ar) == 0 && lua_gettop(co) == 0)
+      lua_pushliteral(L, "dead");
+    else
+      lua_pushliteral(L, "suspended");
+  }
+  return 1;
+}
+
+
+static const luaL_reg co_funcs[] = {
+  {"create", luaB_cocreate},
+  {"wrap", luaB_cowrap},
+  {"resume", luaB_coresume},
+  {"yield", luaB_yield},
+  {"status", luaB_costatus},
+  {NULL, NULL}
+};
+
+/* }====================================================== */
+
+
+
+static void base_open (lua_State *L) {
+  lua_pushliteral(L, "_G");
+  lua_pushvalue(L, LUA_GLOBALSINDEX);
+  luaL_openlib(L, NULL, base_funcs, 0);  /* open lib into global table */
+  lua_pushliteral(L, "_VERSION");
+  lua_pushliteral(L, LUA_VERSION);
+  lua_rawset(L, -3);  /* set global _VERSION */
+  /* `newproxy' needs a weaktable as upvalue */
+  lua_pushliteral(L, "newproxy");
+  lua_newtable(L);  /* new table `w' */
+  lua_pushvalue(L, -1);  /* `w' will be its own metatable */
+  lua_setmetatable(L, -2);
+  lua_pushliteral(L, "__mode");
+  lua_pushliteral(L, "k");
+  lua_rawset(L, -3);  /* metatable(w).__mode = "k" */
+  lua_pushcclosure(L, luaB_newproxy, 1);
+  lua_rawset(L, -3);  /* set global `newproxy' */
+  lua_rawset(L, -1);  /* set global _G */
+}
+
+
+LUALIB_API int luaopen_base (lua_State *L) {
+  base_open(L);
+  luaL_openlib(L, LUA_COLIBNAME, co_funcs, 0);
+  lua_newtable(L);
+  lua_setglobal(L, REQTAB);
+  return 0;
+}
+
diff --git a/lib/lua/src/LuaLib/ldblib.c b/lib/lua/src/LuaLib/ldblib.c
index 455b89f..2449b90 100644
--- a/lib/lua/src/LuaLib/ldblib.c
+++ b/lib/lua/src/LuaLib/ldblib.c
@@ -1,299 +1,299 @@
-/*

-** $Id: ldblib.c,v 1.3 2004-11-27 21:35:21 pixel Exp $

-** Interface from Lua to its debug API

-** See Copyright Notice in lua.h

-*/

-

-

-#include <stdio.h>

-#include <stdlib.h>

-#include <string.h>

-

-#define ldblib_c

-

-#include "lua.h"

-

-#include "lauxlib.h"

-#include "lualib.h"

-

-

-

-static void settabss (lua_State *L, const char *i, const char *v) {

-  lua_pushstring(L, i);

-  lua_pushstring(L, v);

-  lua_rawset(L, -3);

-}

-

-

-static void settabsi (lua_State *L, const char *i, int v) {

-  lua_pushstring(L, i);

-  lua_pushnumber(L, (lua_Number)v);

-  lua_rawset(L, -3);

-}

-

-

-static int getinfo (lua_State *L) {

-  lua_Debug ar;

-  const char *options = luaL_optstring(L, 2, "flnSu");

-  if (lua_isnumber(L, 1)) {

-    if (!lua_getstack(L, (int)(lua_tonumber(L, 1)), &ar)) {

-      lua_pushnil(L);  /* level out of range */

-      return 1;

-    }

-  }

-  else if (lua_isfunction(L, 1)) {

-    lua_pushfstring(L, ">%s", options);

-    options = lua_tostring(L, -1);

-    lua_pushvalue(L, 1);

-  }

-  else

-    return luaL_argerror(L, 1, "function or level expected");

-  if (!lua_getinfo(L, options, &ar))

-    return luaL_argerror(L, 2, "invalid option");

-  lua_newtable(L);

-  for (; *options; options++) {

-    switch (*options) {

-      case 'S':

-        settabss(L, "source", ar.source);

-        settabss(L, "short_src", ar.short_src);

-        settabsi(L, "linedefined", ar.linedefined);

-        settabss(L, "what", ar.what);

-        break;

-      case 'l':

-        settabsi(L, "currentline", ar.currentline);

-        break;

-      case 'u':

-        settabsi(L, "nups", ar.nups);

-        break;

-      case 'n':

-        settabss(L, "name", ar.name);

-        settabss(L, "namewhat", ar.namewhat);

-        break;

-      case 'f':

-        lua_pushliteral(L, "func");

-        lua_pushvalue(L, -3);

-        lua_rawset(L, -3);

-        break;

-    }

-  }

-  return 1;  /* return table */

-}

-    

-

-static int getlocal (lua_State *L) {

-  lua_Debug ar;

-  const char *name;

-  if (!lua_getstack(L, luaL_checkint(L, 1), &ar))  /* level out of range? */

-    return luaL_argerror(L, 1, "level out of range");

-  name = lua_getlocal(L, &ar, luaL_checkint(L, 2));

-  if (name) {

-    lua_pushstring(L, name);

-    lua_pushvalue(L, -2);

-    return 2;

-  }

-  else {

-    lua_pushnil(L);

-    return 1;

-  }

-}

-

-

-static int setlocal (lua_State *L) {

-  lua_Debug ar;

-  if (!lua_getstack(L, luaL_checkint(L, 1), &ar))  /* level out of range? */

-    return luaL_argerror(L, 1, "level out of range");

-  luaL_checkany(L, 3);

-  lua_pushstring(L, lua_setlocal(L, &ar, luaL_checkint(L, 2)));

-  return 1;

-}

-

-

-static int auxupvalue (lua_State *L, int get) {

-  const char *name;

-  int n = luaL_checkint(L, 2);

-  luaL_checktype(L, 1, LUA_TFUNCTION);

-  if (lua_iscfunction(L, 1)) return 0;  /* cannot touch C upvalues from Lua */

-  name = get ? lua_getupvalue(L, 1, n) : lua_setupvalue(L, 1, n);

-  if (name == NULL) return 0;

-  lua_pushstring(L, name);

-  lua_insert(L, -(get+1));

-  return get + 1;

-}

-

-

-static int getupvalue (lua_State *L) {

-  return auxupvalue(L, 1);

-}

-

-

-static int setupvalue (lua_State *L) {

-  luaL_checkany(L, 3);

-  return auxupvalue(L, 0);

-}

-

-

-

-static const char KEY_HOOK = 'h';

-

-

-static void hookf (lua_State *L, lua_Debug *ar) {

-  static const char *const hooknames[] =

-    {"call", "return", "line", "count", "tail return"};

-  lua_pushlightuserdata(L, (void *)&KEY_HOOK);

-  lua_rawget(L, LUA_REGISTRYINDEX);

-  if (lua_isfunction(L, -1)) {

-    lua_pushstring(L, hooknames[(int)ar->event]);

-    if (ar->currentline >= 0)

-      lua_pushnumber(L, (lua_Number)ar->currentline);

-    else lua_pushnil(L);

-    lua_assert(lua_getinfo(L, "lS", ar));

-    lua_call(L, 2, 0);

-  }

-  else

-    lua_pop(L, 1);  /* pop result from gettable */

-}

-

-

-static int makemask (const char *smask, int count) {

-  int mask = 0;

-  if (strchr(smask, 'c')) mask |= LUA_MASKCALL;

-  if (strchr(smask, 'r')) mask |= LUA_MASKRET;

-  if (strchr(smask, 'l')) mask |= LUA_MASKLINE;

-  if (count > 0) mask |= LUA_MASKCOUNT;

-  return mask;

-}

-

-

-static char *unmakemask (int mask, char *smask) {

-  int i = 0;

-  if (mask & LUA_MASKCALL) smask[i++] = 'c';

-  if (mask & LUA_MASKRET) smask[i++] = 'r';

-  if (mask & LUA_MASKLINE) smask[i++] = 'l';

-  smask[i] = '\0';

-  return smask;

-}

-

-

-static int sethook (lua_State *L) {

-  if (lua_isnoneornil(L, 1)) {

-    lua_settop(L, 1);

-    lua_sethook(L, NULL, 0, 0);  /* turn off hooks */

-  }

-  else {

-    const char *smask = luaL_checkstring(L, 2);

-    int count = luaL_optint(L, 3, 0);

-    luaL_checktype(L, 1, LUA_TFUNCTION);

-    lua_sethook(L, hookf, makemask(smask, count), count);

-  }

-  lua_pushlightuserdata(L, (void *)&KEY_HOOK);

-  lua_pushvalue(L, 1);

-  lua_rawset(L, LUA_REGISTRYINDEX);  /* set new hook */

-  return 0;

-}

-

-

-static int gethook (lua_State *L) {

-  char buff[5];

-  int mask = lua_gethookmask(L);

-  lua_Hook hook = lua_gethook(L);

-  if (hook != NULL && hook != hookf)  /* external hook? */

-    lua_pushliteral(L, "external hook");

-  else {

-    lua_pushlightuserdata(L, (void *)&KEY_HOOK);

-    lua_rawget(L, LUA_REGISTRYINDEX);   /* get hook */

-  }

-  lua_pushstring(L, unmakemask(mask, buff));

-  lua_pushnumber(L, (lua_Number)lua_gethookcount(L));

-  return 3;

-}

-

-

-static int debug (lua_State *L) {

-  for (;;) {

-    char buffer[250];

-    fputs("lua_debug> ", stderr);

-    if (fgets(buffer, sizeof(buffer), stdin) == 0 ||

-        strcmp(buffer, "cont\n") == 0)

-      return 0;

-    lua_dostring(L, buffer);

-    lua_settop(L, 0);  /* remove eventual returns */

-  }

-}

-

-

-#define LEVELS1	12	/* size of the first part of the stack */

-#define LEVELS2	10	/* size of the second part of the stack */

-

-static int errorfb (lua_State *L) {

-  int level = 1;  /* skip level 0 (it's this function) */

-  int firstpart = 1;  /* still before eventual `...' */

-  lua_Debug ar;

-  if (lua_gettop(L) == 0)

-    lua_pushliteral(L, "");

-  else if (!lua_isstring(L, 1)) return 1;  /* no string message */

-  else lua_pushliteral(L, "\n");

-  lua_pushliteral(L, "stack traceback:");

-  while (lua_getstack(L, level++, &ar)) {

-    if (level > LEVELS1 && firstpart) {

-      /* no more than `LEVELS2' more levels? */

-      if (!lua_getstack(L, level+LEVELS2, &ar))

-        level--;  /* keep going */

-      else {

-        lua_pushliteral(L, "\n\t...");  /* too many levels */

-        while (lua_getstack(L, level+LEVELS2, &ar))  /* find last levels */

-          level++;

-      }

-      firstpart = 0;

-      continue;

-    }

-    lua_pushliteral(L, "\n\t");

-    lua_getinfo(L, "Snl", &ar);

-    lua_pushfstring(L, "%s:", ar.short_src);

-    if (ar.currentline > 0)

-      lua_pushfstring(L, "%d:", ar.currentline);

-    switch (*ar.namewhat) {

-      case 'g':  /* global */ 

-      case 'l':  /* local */

-      case 'f':  /* field */

-      case 'm':  /* method */

-        lua_pushfstring(L, " in function `%s'", ar.name);

-        break;

-      default: {

-        if (*ar.what == 'm')  /* main? */

-          lua_pushfstring(L, " in main chunk");

-        else if (*ar.what == 'C' || *ar.what == 't')

-          lua_pushliteral(L, " ?");  /* C function or tail call */

-        else

-          lua_pushfstring(L, " in function <%s:%d>",

-                             ar.short_src, ar.linedefined);

-      }

-    }

-    lua_concat(L, lua_gettop(L));

-  }

-  lua_concat(L, lua_gettop(L));

-  return 1;

-}

-

-

-static const luaL_reg dblib[] = {

-  {"getlocal", getlocal},

-  {"getinfo", getinfo},

-  {"gethook", gethook},

-  {"getupvalue", getupvalue},

-  {"sethook", sethook},

-  {"setlocal", setlocal},

-  {"setupvalue", setupvalue},

-  {"debug", debug},

-  {"traceback", errorfb},

-  {NULL, NULL}

-};

-

-

-LUALIB_API int luaopen_debug (lua_State *L) {

-  luaL_openlib(L, LUA_DBLIBNAME, dblib, 0);

-  lua_pushliteral(L, "_TRACEBACK");

-  lua_pushcfunction(L, errorfb);

-  lua_settable(L, LUA_GLOBALSINDEX);

-  return 1;

-}

-

+/*
+** $Id: ldblib.c,v 1.4 2004-11-27 21:46:10 pixel Exp $
+** Interface from Lua to its debug API
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define ldblib_c
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+
+static void settabss (lua_State *L, const char *i, const char *v) {
+  lua_pushstring(L, i);
+  lua_pushstring(L, v);
+  lua_rawset(L, -3);
+}
+
+
+static void settabsi (lua_State *L, const char *i, int v) {
+  lua_pushstring(L, i);
+  lua_pushnumber(L, (lua_Number)v);
+  lua_rawset(L, -3);
+}
+
+
+static int getinfo (lua_State *L) {
+  lua_Debug ar;
+  const char *options = luaL_optstring(L, 2, "flnSu");
+  if (lua_isnumber(L, 1)) {
+    if (!lua_getstack(L, (int)(lua_tonumber(L, 1)), &ar)) {
+      lua_pushnil(L);  /* level out of range */
+      return 1;
+    }
+  }
+  else if (lua_isfunction(L, 1)) {
+    lua_pushfstring(L, ">%s", options);
+    options = lua_tostring(L, -1);
+    lua_pushvalue(L, 1);
+  }
+  else
+    return luaL_argerror(L, 1, "function or level expected");
+  if (!lua_getinfo(L, options, &ar))
+    return luaL_argerror(L, 2, "invalid option");
+  lua_newtable(L);
+  for (; *options; options++) {
+    switch (*options) {
+      case 'S':
+        settabss(L, "source", ar.source);
+        settabss(L, "short_src", ar.short_src);
+        settabsi(L, "linedefined", ar.linedefined);
+        settabss(L, "what", ar.what);
+        break;
+      case 'l':
+        settabsi(L, "currentline", ar.currentline);
+        break;
+      case 'u':
+        settabsi(L, "nups", ar.nups);
+        break;
+      case 'n':
+        settabss(L, "name", ar.name);
+        settabss(L, "namewhat", ar.namewhat);
+        break;
+      case 'f':
+        lua_pushliteral(L, "func");
+        lua_pushvalue(L, -3);
+        lua_rawset(L, -3);
+        break;
+    }
+  }
+  return 1;  /* return table */
+}
+    
+
+static int getlocal (lua_State *L) {
+  lua_Debug ar;
+  const char *name;
+  if (!lua_getstack(L, luaL_checkint(L, 1), &ar))  /* level out of range? */
+    return luaL_argerror(L, 1, "level out of range");
+  name = lua_getlocal(L, &ar, luaL_checkint(L, 2));
+  if (name) {
+    lua_pushstring(L, name);
+    lua_pushvalue(L, -2);
+    return 2;
+  }
+  else {
+    lua_pushnil(L);
+    return 1;
+  }
+}
+
+
+static int setlocal (lua_State *L) {
+  lua_Debug ar;
+  if (!lua_getstack(L, luaL_checkint(L, 1), &ar))  /* level out of range? */
+    return luaL_argerror(L, 1, "level out of range");
+  luaL_checkany(L, 3);
+  lua_pushstring(L, lua_setlocal(L, &ar, luaL_checkint(L, 2)));
+  return 1;
+}
+
+
+static int auxupvalue (lua_State *L, int get) {
+  const char *name;
+  int n = luaL_checkint(L, 2);
+  luaL_checktype(L, 1, LUA_TFUNCTION);
+  if (lua_iscfunction(L, 1)) return 0;  /* cannot touch C upvalues from Lua */
+  name = get ? lua_getupvalue(L, 1, n) : lua_setupvalue(L, 1, n);
+  if (name == NULL) return 0;
+  lua_pushstring(L, name);
+  lua_insert(L, -(get+1));
+  return get + 1;
+}
+
+
+static int getupvalue (lua_State *L) {
+  return auxupvalue(L, 1);
+}
+
+
+static int setupvalue (lua_State *L) {
+  luaL_checkany(L, 3);
+  return auxupvalue(L, 0);
+}
+
+
+
+static const char KEY_HOOK = 'h';
+
+
+static void hookf (lua_State *L, lua_Debug *ar) {
+  static const char *const hooknames[] =
+    {"call", "return", "line", "count", "tail return"};
+  lua_pushlightuserdata(L, (void *)&KEY_HOOK);
+  lua_rawget(L, LUA_REGISTRYINDEX);
+  if (lua_isfunction(L, -1)) {
+    lua_pushstring(L, hooknames[(int)ar->event]);
+    if (ar->currentline >= 0)
+      lua_pushnumber(L, (lua_Number)ar->currentline);
+    else lua_pushnil(L);
+    lua_assert(lua_getinfo(L, "lS", ar));
+    lua_call(L, 2, 0);
+  }
+  else
+    lua_pop(L, 1);  /* pop result from gettable */
+}
+
+
+static int makemask (const char *smask, int count) {
+  int mask = 0;
+  if (strchr(smask, 'c')) mask |= LUA_MASKCALL;
+  if (strchr(smask, 'r')) mask |= LUA_MASKRET;
+  if (strchr(smask, 'l')) mask |= LUA_MASKLINE;
+  if (count > 0) mask |= LUA_MASKCOUNT;
+  return mask;
+}
+
+
+static char *unmakemask (int mask, char *smask) {
+  int i = 0;
+  if (mask & LUA_MASKCALL) smask[i++] = 'c';
+  if (mask & LUA_MASKRET) smask[i++] = 'r';
+  if (mask & LUA_MASKLINE) smask[i++] = 'l';
+  smask[i] = '\0';
+  return smask;
+}
+
+
+static int sethook (lua_State *L) {
+  if (lua_isnoneornil(L, 1)) {
+    lua_settop(L, 1);
+    lua_sethook(L, NULL, 0, 0);  /* turn off hooks */
+  }
+  else {
+    const char *smask = luaL_checkstring(L, 2);
+    int count = luaL_optint(L, 3, 0);
+    luaL_checktype(L, 1, LUA_TFUNCTION);
+    lua_sethook(L, hookf, makemask(smask, count), count);
+  }
+  lua_pushlightuserdata(L, (void *)&KEY_HOOK);
+  lua_pushvalue(L, 1);
+  lua_rawset(L, LUA_REGISTRYINDEX);  /* set new hook */
+  return 0;
+}
+
+
+static int gethook (lua_State *L) {
+  char buff[5];
+  int mask = lua_gethookmask(L);
+  lua_Hook hook = lua_gethook(L);
+  if (hook != NULL && hook != hookf)  /* external hook? */
+    lua_pushliteral(L, "external hook");
+  else {
+    lua_pushlightuserdata(L, (void *)&KEY_HOOK);
+    lua_rawget(L, LUA_REGISTRYINDEX);   /* get hook */
+  }
+  lua_pushstring(L, unmakemask(mask, buff));
+  lua_pushnumber(L, (lua_Number)lua_gethookcount(L));
+  return 3;
+}
+
+
+static int debug (lua_State *L) {
+  for (;;) {
+    char buffer[250];
+    fputs("lua_debug> ", stderr);
+    if (fgets(buffer, sizeof(buffer), stdin) == 0 ||
+        strcmp(buffer, "cont\n") == 0)
+      return 0;
+    lua_dostring(L, buffer);
+    lua_settop(L, 0);  /* remove eventual returns */
+  }
+}
+
+
+#define LEVELS1	12	/* size of the first part of the stack */
+#define LEVELS2	10	/* size of the second part of the stack */
+
+static int errorfb (lua_State *L) {
+  int level = 1;  /* skip level 0 (it's this function) */
+  int firstpart = 1;  /* still before eventual `...' */
+  lua_Debug ar;
+  if (lua_gettop(L) == 0)
+    lua_pushliteral(L, "");
+  else if (!lua_isstring(L, 1)) return 1;  /* no string message */
+  else lua_pushliteral(L, "\n");
+  lua_pushliteral(L, "stack traceback:");
+  while (lua_getstack(L, level++, &ar)) {
+    if (level > LEVELS1 && firstpart) {
+      /* no more than `LEVELS2' more levels? */
+      if (!lua_getstack(L, level+LEVELS2, &ar))
+        level--;  /* keep going */
+      else {
+        lua_pushliteral(L, "\n\t...");  /* too many levels */
+        while (lua_getstack(L, level+LEVELS2, &ar))  /* find last levels */
+          level++;
+      }
+      firstpart = 0;
+      continue;
+    }
+    lua_pushliteral(L, "\n\t");
+    lua_getinfo(L, "Snl", &ar);
+    lua_pushfstring(L, "%s:", ar.short_src);
+    if (ar.currentline > 0)
+      lua_pushfstring(L, "%d:", ar.currentline);
+    switch (*ar.namewhat) {
+      case 'g':  /* global */ 
+      case 'l':  /* local */
+      case 'f':  /* field */
+      case 'm':  /* method */
+        lua_pushfstring(L, " in function `%s'", ar.name);
+        break;
+      default: {
+        if (*ar.what == 'm')  /* main? */
+          lua_pushfstring(L, " in main chunk");
+        else if (*ar.what == 'C' || *ar.what == 't')
+          lua_pushliteral(L, " ?");  /* C function or tail call */
+        else
+          lua_pushfstring(L, " in function <%s:%d>",
+                             ar.short_src, ar.linedefined);
+      }
+    }
+    lua_concat(L, lua_gettop(L));
+  }
+  lua_concat(L, lua_gettop(L));
+  return 1;
+}
+
+
+static const luaL_reg dblib[] = {
+  {"getlocal", getlocal},
+  {"getinfo", getinfo},
+  {"gethook", gethook},
+  {"getupvalue", getupvalue},
+  {"sethook", sethook},
+  {"setlocal", setlocal},
+  {"setupvalue", setupvalue},
+  {"debug", debug},
+  {"traceback", errorfb},
+  {NULL, NULL}
+};
+
+
+LUALIB_API int luaopen_debug (lua_State *L) {
+  luaL_openlib(L, LUA_DBLIBNAME, dblib, 0);
+  lua_pushliteral(L, "_TRACEBACK");
+  lua_pushcfunction(L, errorfb);
+  lua_settable(L, LUA_GLOBALSINDEX);
+  return 1;
+}
+
diff --git a/lib/lua/src/LuaLib/ldirlib.c b/lib/lua/src/LuaLib/ldirlib.c
index 4e221b4..9bf2090 100644
--- a/lib/lua/src/LuaLib/ldirlib.c
+++ b/lib/lua/src/LuaLib/ldirlib.c
@@ -1,96 +1,96 @@
-#include <stdlib.h>

-#include <dirent.h>

-#include <errno.h>

-#include <sys/stat.h>

-

-#define ldirlib_c

-

-#include "lua.h"

-

-#include "lauxlib.h"

-#include "lualib.h"

-

-/* forward declaration for the iterator function */

-static int dir_iter (lua_State *L);

-

-static int l_dir (lua_State *L) {

-    const char *path = luaL_checkstring(L, 1);

-

-    /* create a userdatum to store a DIR address */

-    DIR **d = (DIR **)lua_newuserdata(L, sizeof(DIR *));

-

-    /* set its metatable */

-    luaL_getmetatable(L, "LuaBook.dir");

-    lua_setmetatable(L, -2);

-

-    /* try to open the given directory */

-    *d = opendir(path);

-    if (*d == NULL)  /* error opening the directory? */

-    luaL_error(L, "cannot open %s: %s", path,

-                                        strerror(errno));

-

-    /* creates and returns the iterator function

-        (its sole upvalue, the directory userdatum,

-        is already on the stack top */

-    lua_pushcclosure(L, dir_iter, 1);

-    return 1;

-}

-

-static int dir_iter (lua_State *L) {

-    DIR *d = *(DIR **)lua_touserdata(L, lua_upvalueindex(1));

-    struct dirent *entry;

-#ifdef _WIN32

-    struct _stat file_stat;

-#else

-    struct stat file_stat;

-#endif

-    if ((entry = readdir(d)) != NULL) {

-	lua_newtable(L);

-	lua_pushstring(L, "name");

-	lua_pushstring(L, entry->d_name);

-	lua_settable(L, -3);

-#ifdef _WIN32

-	_stat(entry->d_name, &file_stat);

-#else

-	stat(entry->d_name, &file_stat);

-#endif

-	lua_pushstring(L, "type");

-	lua_pushnumber(L, (S_IFREG & file_stat.st_mode) ? 2 : ((S_IFDIR & file_stat.st_mode) ? 1 : 0));

-	lua_settable(L, -3);

-

-	return 1;

-    }

-    else return 0;  /* no more values to return */

-}

-

-static int dir_gc (lua_State *L) {

-    DIR *d = *(DIR **)lua_touserdata(L, 1);

-    if (d) closedir(d);

-    return 0;

-}

-

-static const luaL_reg dirlib[] = {

-  {NULL, NULL}

-};

-

-int luaopen_dir (lua_State *L) {

-    luaL_openlib(L, LUA_DIRLIBNAME, dirlib, 0);

-    luaL_newmetatable(L, "LuaBook.dir");

-

-    /* set its __gc field */

-    lua_pushstring(L, "__gc");

-    lua_pushcfunction(L, dir_gc);

-    lua_settable(L, -3);

-

-    /* register the `dir' function */

-    lua_pushcfunction(L, l_dir);

-    lua_setglobal(L, "dir");

-

-    lua_pushnumber(L, 1);

-    lua_setglobal(L, "FLAG_DIR");

-

-    lua_pushnumber(L, 2);

-    lua_setglobal(L, "FLAG_FILE");

-

-    return 0;

-}

+#include <stdlib.h>
+#include <dirent.h>
+#include <errno.h>
+#include <sys/stat.h>
+
+#define ldirlib_c
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+/* forward declaration for the iterator function */
+static int dir_iter (lua_State *L);
+
+static int l_dir (lua_State *L) {
+    const char *path = luaL_checkstring(L, 1);
+
+    /* create a userdatum to store a DIR address */
+    DIR **d = (DIR **)lua_newuserdata(L, sizeof(DIR *));
+
+    /* set its metatable */
+    luaL_getmetatable(L, "LuaBook.dir");
+    lua_setmetatable(L, -2);
+
+    /* try to open the given directory */
+    *d = opendir(path);
+    if (*d == NULL)  /* error opening the directory? */
+    luaL_error(L, "cannot open %s: %s", path,
+                                        strerror(errno));
+
+    /* creates and returns the iterator function
+        (its sole upvalue, the directory userdatum,
+        is already on the stack top */
+    lua_pushcclosure(L, dir_iter, 1);
+    return 1;
+}
+
+static int dir_iter (lua_State *L) {
+    DIR *d = *(DIR **)lua_touserdata(L, lua_upvalueindex(1));
+    struct dirent *entry;
+#ifdef _WIN32
+    struct _stat file_stat;
+#else
+    struct stat file_stat;
+#endif
+    if ((entry = readdir(d)) != NULL) {
+	lua_newtable(L);
+	lua_pushstring(L, "name");
+	lua_pushstring(L, entry->d_name);
+	lua_settable(L, -3);
+#ifdef _WIN32
+	_stat(entry->d_name, &file_stat);
+#else
+	stat(entry->d_name, &file_stat);
+#endif
+	lua_pushstring(L, "type");
+	lua_pushnumber(L, (S_IFREG & file_stat.st_mode) ? 2 : ((S_IFDIR & file_stat.st_mode) ? 1 : 0));
+	lua_settable(L, -3);
+
+	return 1;
+    }
+    else return 0;  /* no more values to return */
+}
+
+static int dir_gc (lua_State *L) {
+    DIR *d = *(DIR **)lua_touserdata(L, 1);
+    if (d) closedir(d);
+    return 0;
+}
+
+static const luaL_reg dirlib[] = {
+  {NULL, NULL}
+};
+
+int luaopen_dir (lua_State *L) {
+    luaL_openlib(L, LUA_DIRLIBNAME, dirlib, 0);
+    luaL_newmetatable(L, "LuaBook.dir");
+
+    /* set its __gc field */
+    lua_pushstring(L, "__gc");
+    lua_pushcfunction(L, dir_gc);
+    lua_settable(L, -3);
+
+    /* register the `dir' function */
+    lua_pushcfunction(L, l_dir);
+    lua_setglobal(L, "dir");
+
+    lua_pushnumber(L, 1);
+    lua_setglobal(L, "FLAG_DIR");
+
+    lua_pushnumber(L, 2);
+    lua_setglobal(L, "FLAG_FILE");
+
+    return 0;
+}
diff --git a/lib/lua/src/LuaLib/liolib.c b/lib/lua/src/LuaLib/liolib.c
index 3eeb05f..69e0a19 100644
--- a/lib/lua/src/LuaLib/liolib.c
+++ b/lib/lua/src/LuaLib/liolib.c
@@ -1,750 +1,750 @@
-/*

-** $Id: liolib.c,v 1.3 2004-11-27 21:35:21 pixel Exp $

-** Standard I/O (and system) library

-** See Copyright Notice in lua.h

-*/

-

-

-#include <errno.h>

-#include <locale.h>

-#include <stdio.h>

-#include <stdlib.h>

-#include <string.h>

-#include <time.h>

-

-#define liolib_c

-

-#include "lua.h"

-

-#include "lauxlib.h"

-#include "lualib.h"

-

-

-

-/*

-** by default, gcc does not get `tmpname'

-*/

-#ifndef USE_TMPNAME

-#ifdef __GNUC__

-#define USE_TMPNAME	0

-#else

-#define USE_TMPNAME	1

-#endif

-#endif

-

-

-/*

-** by default, posix systems get `popen'

-*/

-#ifndef USE_POPEN

-#ifdef _POSIX_C_SOURCE

-#if _POSIX_C_SOURCE >= 2

-#define USE_POPEN	1

-#endif

-#endif

-#endif

-

-#ifndef USE_POPEN

-#define USE_POPEN	0

-#endif

-

-

-

-

-/*

-** {======================================================

-** FILE Operations

-** =======================================================

-*/

-

-

-#if !USE_POPEN

-#define pclose(f)    (-1)

-#endif

-

-

-#define FILEHANDLE		"FILE*"

-

-#define IO_INPUT		"_input"

-#define IO_OUTPUT		"_output"

-

-

-static int pushresult (lua_State *L, int i, const char *filename) {

-  if (i) {

-    lua_pushboolean(L, 1);

-    return 1;

-  }

-  else {

-    lua_pushnil(L);

-    if (filename)

-      lua_pushfstring(L, "%s: %s", filename, strerror(errno));

-    else

-      lua_pushfstring(L, "%s", strerror(errno));

-    lua_pushnumber(L, errno);

-    return 3;

-  }

-}

-

-

-static FILE **topfile (lua_State *L, int findex) {

-  FILE **f = (FILE **)luaL_checkudata(L, findex, FILEHANDLE);

-  if (f == NULL) luaL_argerror(L, findex, "bad file");

-  return f;

-}

-

-

-static int io_type (lua_State *L) {

-  FILE **f = (FILE **)luaL_checkudata(L, 1, FILEHANDLE);

-  if (f == NULL) lua_pushnil(L);

-  else if (*f == NULL)

-    lua_pushliteral(L, "closed file");

-  else

-    lua_pushliteral(L, "file");

-  return 1;

-}

-

-

-static FILE *tofile (lua_State *L, int findex) {

-  FILE **f = topfile(L, findex);

-  if (*f == NULL)

-    luaL_error(L, "attempt to use a closed file");

-  return *f;

-}

-

-

-

-/*

-** When creating file handles, always creates a `closed' file handle

-** before opening the actual file; so, if there is a memory error, the

-** file is not left opened.

-*/

-static FILE **newfile (lua_State *L) {

-  FILE **pf = (FILE **)lua_newuserdata(L, sizeof(FILE *));

-  *pf = NULL;  /* file handle is currently `closed' */

-  luaL_getmetatable(L, FILEHANDLE);

-  lua_setmetatable(L, -2);

-  return pf;

-}

-

-

-/*

-** assumes that top of the stack is the `io' library, and next is

-** the `io' metatable

-*/

-static void registerfile (lua_State *L, FILE *f, const char *name,

-                                                 const char *impname) {

-  lua_pushstring(L, name);

-  *newfile(L) = f;

-  if (impname) {

-    lua_pushstring(L, impname);

-    lua_pushvalue(L, -2);

-    lua_settable(L, -6);  /* metatable[impname] = file */

-  }

-  lua_settable(L, -3);  /* io[name] = file */

-}

-

-

-static int aux_close (lua_State *L) {

-  FILE *f = tofile(L, 1);

-  if (f == stdin || f == stdout || f == stderr)

-    return 0;  /* file cannot be closed */

-  else {

-    int ok = (pclose(f) != -1) || (fclose(f) == 0);

-    if (ok)

-      *(FILE **)lua_touserdata(L, 1) = NULL;  /* mark file as closed */

-    return ok;

-  }

-}

-

-

-static int io_close (lua_State *L) {

-  if (lua_isnone(L, 1)) {

-    lua_pushstring(L, IO_OUTPUT);

-    lua_rawget(L, lua_upvalueindex(1));

-  }

-  return pushresult(L, aux_close(L), NULL);

-}

-

-

-static int io_gc (lua_State *L) {

-  FILE **f = topfile(L, 1);

-  if (*f != NULL)  /* ignore closed files */

-    aux_close(L);

-  return 0;

-}

-

-

-static int io_tostring (lua_State *L) {

-  char buff[32];

-  FILE **f = topfile(L, 1);

-  if (*f == NULL)

-    strcpy(buff, "closed");

-  else

-    sprintf(buff, "%p", lua_touserdata(L, 1));

-  lua_pushfstring(L, "file (%s)", buff);

-  return 1;

-}

-

-

-static int io_open (lua_State *L) {

-  const char *filename = luaL_checkstring(L, 1);

-  const char *mode = luaL_optstring(L, 2, "r");

-  FILE **pf = newfile(L);

-  *pf = fopen(filename, mode);

-  return (*pf == NULL) ? pushresult(L, 0, filename) : 1;

-}

-

-

-static int io_popen (lua_State *L) {

-#if !USE_POPEN

-  luaL_error(L, "`popen' not supported");

-  return 0;

-#else

-  const char *filename = luaL_checkstring(L, 1);

-  const char *mode = luaL_optstring(L, 2, "r");

-  FILE **pf = newfile(L);

-  *pf = popen(filename, mode);

-  return (*pf == NULL) ? pushresult(L, 0, filename) : 1;

-#endif

-}

-

-

-static int io_tmpfile (lua_State *L) {

-  FILE **pf = newfile(L);

-  *pf = tmpfile();

-  return (*pf == NULL) ? pushresult(L, 0, NULL) : 1;

-}

-

-

-static FILE *getiofile (lua_State *L, const char *name) {

-  lua_pushstring(L, name);

-  lua_rawget(L, lua_upvalueindex(1));

-  return tofile(L, -1);

-}

-

-

-static int g_iofile (lua_State *L, const char *name, const char *mode) {

-  if (!lua_isnoneornil(L, 1)) {

-    const char *filename = lua_tostring(L, 1);

-    lua_pushstring(L, name);

-    if (filename) {

-      FILE **pf = newfile(L);

-      *pf = fopen(filename, mode);

-      if (*pf == NULL) {

-        lua_pushfstring(L, "%s: %s", filename, strerror(errno));

-        luaL_argerror(L, 1, lua_tostring(L, -1));

-      }

-    }

-    else {

-      tofile(L, 1);  /* check that it's a valid file handle */

-      lua_pushvalue(L, 1);

-    }

-    lua_rawset(L, lua_upvalueindex(1));

-  }

-  /* return current value */

-  lua_pushstring(L, name);

-  lua_rawget(L, lua_upvalueindex(1));

-  return 1;

-}

-

-

-static int io_input (lua_State *L) {

-  return g_iofile(L, IO_INPUT, "r");

-}

-

-

-static int io_output (lua_State *L) {

-  return g_iofile(L, IO_OUTPUT, "w");

-}

-

-

-static int io_readline (lua_State *L);

-

-

-static void aux_lines (lua_State *L, int idx, int close) {

-  lua_pushliteral(L, FILEHANDLE);

-  lua_rawget(L, LUA_REGISTRYINDEX);

-  lua_pushvalue(L, idx);

-  lua_pushboolean(L, close);  /* close/not close file when finished */

-  lua_pushcclosure(L, io_readline, 3);

-}

-

-

-static int f_lines (lua_State *L) {

-  tofile(L, 1);  /* check that it's a valid file handle */

-  aux_lines(L, 1, 0);

-  return 1;

-}

-

-

-static int io_lines (lua_State *L) {

-  if (lua_isnoneornil(L, 1)) {  /* no arguments? */

-    lua_pushstring(L, IO_INPUT);

-    lua_rawget(L, lua_upvalueindex(1));  /* will iterate over default input */

-    return f_lines(L);

-  }

-  else {

-    const char *filename = luaL_checkstring(L, 1);

-    FILE **pf = newfile(L);

-    *pf = fopen(filename, "r");

-    luaL_argcheck(L, *pf, 1,  strerror(errno));

-    aux_lines(L, lua_gettop(L), 1);

-    return 1;

-  }

-}

-

-

-/*

-** {======================================================

-** READ

-** =======================================================

-*/

-

-

-static int read_number (lua_State *L, FILE *f) {

-  lua_Number d;

-  if (fscanf(f, LUA_NUMBER_SCAN, &d) == 1) {

-    lua_pushnumber(L, d);

-    return 1;

-  }

-  else return 0;  /* read fails */

-}

-

-

-static int test_eof (lua_State *L, FILE *f) {

-  int c = getc(f);

-  ungetc(c, f);

-  lua_pushlstring(L, NULL, 0);

-  return (c != EOF);

-}

-

-

-static int read_line (lua_State *L, FILE *f) {

-  luaL_Buffer b;

-  luaL_buffinit(L, &b);

-  for (;;) {

-    size_t l;

-    char *p = luaL_prepbuffer(&b);

-    if (fgets(p, LUAL_BUFFERSIZE, f) == NULL) {  /* eof? */

-      luaL_pushresult(&b);  /* close buffer */

-      return (lua_strlen(L, -1) > 0);  /* check whether read something */

-    }

-    l = strlen(p);

-    if (p[l-1] != '\n')

-      luaL_addsize(&b, l);

-    else {

-      luaL_addsize(&b, l - 1);  /* do not include `eol' */

-      luaL_pushresult(&b);  /* close buffer */

-      return 1;  /* read at least an `eol' */

-    }

-  }

-}

-

-

-static int read_chars (lua_State *L, FILE *f, size_t n) {

-  size_t rlen;  /* how much to read */

-  size_t nr;  /* number of chars actually read */

-  luaL_Buffer b;

-  luaL_buffinit(L, &b);

-  rlen = LUAL_BUFFERSIZE;  /* try to read that much each time */

-  do {

-    char *p = luaL_prepbuffer(&b);

-    if (rlen > n) rlen = n;  /* cannot read more than asked */

-    nr = fread(p, sizeof(char), rlen, f);

-    luaL_addsize(&b, nr);

-    n -= nr;  /* still have to read `n' chars */

-  } while (n > 0 && nr == rlen);  /* until end of count or eof */

-  luaL_pushresult(&b);  /* close buffer */

-  return (n == 0 || lua_strlen(L, -1) > 0);

-}

-

-

-static int g_read (lua_State *L, FILE *f, int first) {

-  int nargs = lua_gettop(L) - 1;

-  int success;

-  int n;

-  if (nargs == 0) {  /* no arguments? */

-    success = read_line(L, f);

-    n = first+1;  /* to return 1 result */

-  }

-  else {  /* ensure stack space for all results and for auxlib's buffer */

-    luaL_checkstack(L, nargs+LUA_MINSTACK, "too many arguments");

-    success = 1;

-    for (n = first; nargs-- && success; n++) {

-      if (lua_type(L, n) == LUA_TNUMBER) {

-        size_t l = (size_t)lua_tonumber(L, n);

-        success = (l == 0) ? test_eof(L, f) : read_chars(L, f, l);

-      }

-      else {

-        const char *p = lua_tostring(L, n);

-        luaL_argcheck(L, p && p[0] == '*', n, "invalid option");

-        switch (p[1]) {

-          case 'n':  /* number */

-            success = read_number(L, f);

-            break;

-          case 'l':  /* line */

-            success = read_line(L, f);

-            break;

-          case 'a':  /* file */

-            read_chars(L, f, ~((size_t)0));  /* read MAX_SIZE_T chars */

-            success = 1; /* always success */

-            break;

-          case 'w':  /* word */

-            return luaL_error(L, "obsolete option `*w' to `read'");

-          default:

-            return luaL_argerror(L, n, "invalid format");

-        }

-      }

-    }

-  }

-  if (!success) {

-    lua_pop(L, 1);  /* remove last result */

-    lua_pushnil(L);  /* push nil instead */

-  }

-  return n - first;

-}

-

-

-static int io_read (lua_State *L) {

-  return g_read(L, getiofile(L, IO_INPUT), 1);

-}

-

-

-static int f_read (lua_State *L) {

-  return g_read(L, tofile(L, 1), 2);

-}

-

-

-static int io_readline (lua_State *L) {

-  FILE *f = *(FILE **)lua_touserdata(L, lua_upvalueindex(2));

-  if (f == NULL)  /* file is already closed? */

-    luaL_error(L, "file is already closed");

-  if (read_line(L, f)) return 1;

-  else {  /* EOF */

-    if (lua_toboolean(L, lua_upvalueindex(3))) {  /* generator created file? */

-      lua_settop(L, 0);

-      lua_pushvalue(L, lua_upvalueindex(2));

-      aux_close(L);  /* close it */

-    }

-    return 0;

-  }

-}

-

-/* }====================================================== */

-

-

-static int g_write (lua_State *L, FILE *f, int arg) {

-  int nargs = lua_gettop(L) - 1;

-  int status = 1;

-  for (; nargs--; arg++) {

-    if (lua_type(L, arg) == LUA_TNUMBER) {

-      /* optimization: could be done exactly as for strings */

-      status = status &&

-          fprintf(f, LUA_NUMBER_FMT, lua_tonumber(L, arg)) > 0;

-    }

-    else {

-      size_t l;

-      const char *s = luaL_checklstring(L, arg, &l);

-      status = status && (fwrite(s, sizeof(char), l, f) == l);

-    }

-  }

-  return pushresult(L, status, NULL);

-}

-

-

-static int io_write (lua_State *L) {

-  return g_write(L, getiofile(L, IO_OUTPUT), 1);

-}

-

-

-static int f_write (lua_State *L) {

-  return g_write(L, tofile(L, 1), 2);

-}

-

-

-static int f_seek (lua_State *L) {

-  static const int mode[] = {SEEK_SET, SEEK_CUR, SEEK_END};

-  static const char *const modenames[] = {"set", "cur", "end", NULL};

-  FILE *f = tofile(L, 1);

-  int op = luaL_findstring(luaL_optstring(L, 2, "cur"), modenames);

-  long offset = luaL_optlong(L, 3, 0);

-  luaL_argcheck(L, op != -1, 2, "invalid mode");

-  op = fseek(f, offset, mode[op]);

-  if (op)

-    return pushresult(L, 0, NULL);  /* error */

-  else {

-    lua_pushnumber(L, ftell(f));

-    return 1;

-  }

-}

-

-

-static int io_flush (lua_State *L) {

-  return pushresult(L, fflush(getiofile(L, IO_OUTPUT)) == 0, NULL);

-}

-

-

-static int f_flush (lua_State *L) {

-  return pushresult(L, fflush(tofile(L, 1)) == 0, NULL);

-}

-

-

-static const luaL_reg iolib[] = {

-  {"input", io_input},

-  {"output", io_output},

-  {"lines", io_lines},

-  {"close", io_close},

-  {"flush", io_flush},

-  {"open", io_open},

-  {"popen", io_popen},

-  {"read", io_read},

-  {"tmpfile", io_tmpfile},

-  {"type", io_type},

-  {"write", io_write},

-  {NULL, NULL}

-};

-

-

-static const luaL_reg flib[] = {

-  {"flush", f_flush},

-  {"read", f_read},

-  {"lines", f_lines},

-  {"seek", f_seek},

-  {"write", f_write},

-  {"close", io_close},

-  {"__gc", io_gc},

-  {"__tostring", io_tostring},

-  {NULL, NULL}

-};

-

-

-static void createmeta (lua_State *L) {

-  luaL_newmetatable(L, FILEHANDLE);  /* create new metatable for file handles */

-  /* file methods */

-  lua_pushliteral(L, "__index");

-  lua_pushvalue(L, -2);  /* push metatable */

-  lua_rawset(L, -3);  /* metatable.__index = metatable */

-  luaL_openlib(L, NULL, flib, 0);

-}

-

-/* }====================================================== */

-

-

-/*

-** {======================================================

-** Other O.S. Operations

-** =======================================================

-*/

-

-static int io_execute (lua_State *L) {

-  lua_pushnumber(L, system(luaL_checkstring(L, 1)));

-  return 1;

-}

-

-

-static int io_remove (lua_State *L) {

-  const char *filename = luaL_checkstring(L, 1);

-  return pushresult(L, remove(filename) == 0, filename);

-}

-

-

-static int io_rename (lua_State *L) {

-  const char *fromname = luaL_checkstring(L, 1);

-  const char *toname = luaL_checkstring(L, 2);

-  return pushresult(L, rename(fromname, toname) == 0, fromname);

-}

-

-

-static int io_tmpname (lua_State *L) {

-#if !USE_TMPNAME

-  luaL_error(L, "`tmpname' not supported");

-  return 0;

-#else

-  char buff[L_tmpnam];

-  if (tmpnam(buff) != buff)

-    return luaL_error(L, "unable to generate a unique filename in `tmpname'");

-  lua_pushstring(L, buff);

-  return 1;

-#endif

-}

-

-

-static int io_getenv (lua_State *L) {

-  lua_pushstring(L, getenv(luaL_checkstring(L, 1)));  /* if NULL push nil */

-  return 1;

-}

-

-

-static int io_clock (lua_State *L) {

-  lua_pushnumber(L, ((lua_Number)clock())/(lua_Number)CLOCKS_PER_SEC);

-  return 1;

-}

-

-

-/*

-** {======================================================

-** Time/Date operations

-** { year=%Y, month=%m, day=%d, hour=%H, min=%M, sec=%S,

-**   wday=%w+1, yday=%j, isdst=? }

-** =======================================================

-*/

-

-static void setfield (lua_State *L, const char *key, int value) {

-  lua_pushstring(L, key);

-  lua_pushnumber(L, value);

-  lua_rawset(L, -3);

-}

-

-static void setboolfield (lua_State *L, const char *key, int value) {

-  lua_pushstring(L, key);

-  lua_pushboolean(L, value);

-  lua_rawset(L, -3);

-}

-

-static int getboolfield (lua_State *L, const char *key) {

-  int res;

-  lua_pushstring(L, key);

-  lua_gettable(L, -2);

-  res = lua_toboolean(L, -1);

-  lua_pop(L, 1);

-  return res;

-}

-

-

-static int getfield (lua_State *L, const char *key, int d) {

-  int res;

-  lua_pushstring(L, key);

-  lua_gettable(L, -2);

-  if (lua_isnumber(L, -1))

-    res = (int)(lua_tonumber(L, -1));

-  else {

-    if (d == -2)

-      return luaL_error(L, "field `%s' missing in date table", key);

-    res = d;

-  }

-  lua_pop(L, 1);

-  return res;

-}

-

-

-static int io_date (lua_State *L) {

-  const char *s = luaL_optstring(L, 1, "%c");

-  time_t t = (time_t)(luaL_optnumber(L, 2, -1));

-  struct tm *stm;

-  if (t == (time_t)(-1))  /* no time given? */

-    t = time(NULL);  /* use current time */

-  if (*s == '!') {  /* UTC? */

-    stm = gmtime(&t);

-    s++;  /* skip `!' */

-  }

-  else

-    stm = localtime(&t);

-  if (stm == NULL)  /* invalid date? */

-    lua_pushnil(L);

-  else if (strcmp(s, "*t") == 0) {

-    lua_newtable(L);

-    setfield(L, "sec", stm->tm_sec);

-    setfield(L, "min", stm->tm_min);

-    setfield(L, "hour", stm->tm_hour);

-    setfield(L, "day", stm->tm_mday);

-    setfield(L, "month", stm->tm_mon+1);

-    setfield(L, "year", stm->tm_year+1900);

-    setfield(L, "wday", stm->tm_wday+1);

-    setfield(L, "yday", stm->tm_yday+1);

-    setboolfield(L, "isdst", stm->tm_isdst);

-  }

-  else {

-    char b[256];

-    if (strftime(b, sizeof(b), s, stm))

-      lua_pushstring(L, b);

-    else

-      return luaL_error(L, "`date' format too long");

-  }

-  return 1;

-}

-

-

-static int io_time (lua_State *L) {

-  if (lua_isnoneornil(L, 1))  /* called without args? */

-    lua_pushnumber(L, time(NULL));  /* return current time */

-  else {

-    time_t t;

-    struct tm ts;

-    luaL_checktype(L, 1, LUA_TTABLE);

-    lua_settop(L, 1);  /* make sure table is at the top */

-    ts.tm_sec = getfield(L, "sec", 0);

-    ts.tm_min = getfield(L, "min", 0);

-    ts.tm_hour = getfield(L, "hour", 12);

-    ts.tm_mday = getfield(L, "day", -2);

-    ts.tm_mon = getfield(L, "month", -2) - 1;

-    ts.tm_year = getfield(L, "year", -2) - 1900;

-    ts.tm_isdst = getboolfield(L, "isdst");

-    t = mktime(&ts);

-    if (t == (time_t)(-1))

-      lua_pushnil(L);

-    else

-      lua_pushnumber(L, t);

-  }

-  return 1;

-}

-

-

-static int io_difftime (lua_State *L) {

-  lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)),

-                             (time_t)(luaL_optnumber(L, 2, 0))));

-  return 1;

-}

-

-/* }====================================================== */

-

-

-static int io_setloc (lua_State *L) {

-  static const int cat[] = {LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY,

-                      LC_NUMERIC, LC_TIME};

-  static const char *const catnames[] = {"all", "collate", "ctype", "monetary",

-     "numeric", "time", NULL};

-  const char *l = lua_tostring(L, 1);

-  int op = luaL_findstring(luaL_optstring(L, 2, "all"), catnames);

-  luaL_argcheck(L, l || lua_isnoneornil(L, 1), 1, "string expected");

-  luaL_argcheck(L, op != -1, 2, "invalid option");

-  lua_pushstring(L, setlocale(cat[op], l));

-  return 1;

-}

-

-

-static int io_exit (lua_State *L) {

-  exit(luaL_optint(L, 1, EXIT_SUCCESS));

-  return 0;  /* to avoid warnings */

-}

-

-static const luaL_reg syslib[] = {

-  {"clock",     io_clock},

-  {"date",      io_date},

-  {"difftime",  io_difftime},

-  {"execute",   io_execute},

-  {"exit",      io_exit},

-  {"getenv",    io_getenv},

-  {"remove",    io_remove},

-  {"rename",    io_rename},

-  {"setlocale", io_setloc},

-  {"time",      io_time},

-  {"tmpname",   io_tmpname},

-  {NULL, NULL}

-};

-

-/* }====================================================== */

-

-

-

-LUALIB_API int luaopen_io (lua_State *L) {

-  luaL_openlib(L, LUA_OSLIBNAME, syslib, 0);

-  createmeta(L);

-  lua_pushvalue(L, -1);

-  luaL_openlib(L, LUA_IOLIBNAME, iolib, 1);

-  /* put predefined file handles into `io' table */

-  registerfile(L, stdin, "stdin", IO_INPUT);

-  registerfile(L, stdout, "stdout", IO_OUTPUT);

-  registerfile(L, stderr, "stderr", NULL);

-  return 1;

-}

-

+/*
+** $Id: liolib.c,v 1.4 2004-11-27 21:46:10 pixel Exp $
+** Standard I/O (and system) library
+** See Copyright Notice in lua.h
+*/
+
+
+#include <errno.h>
+#include <locale.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#define liolib_c
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+
+/*
+** by default, gcc does not get `tmpname'
+*/
+#ifndef USE_TMPNAME
+#ifdef __GNUC__
+#define USE_TMPNAME	0
+#else
+#define USE_TMPNAME	1
+#endif
+#endif
+
+
+/*
+** by default, posix systems get `popen'
+*/
+#ifndef USE_POPEN
+#ifdef _POSIX_C_SOURCE
+#if _POSIX_C_SOURCE >= 2
+#define USE_POPEN	1
+#endif
+#endif
+#endif
+
+#ifndef USE_POPEN
+#define USE_POPEN	0
+#endif
+
+
+
+
+/*
+** {======================================================
+** FILE Operations
+** =======================================================
+*/
+
+
+#if !USE_POPEN
+#define pclose(f)    (-1)
+#endif
+
+
+#define FILEHANDLE		"FILE*"
+
+#define IO_INPUT		"_input"
+#define IO_OUTPUT		"_output"
+
+
+static int pushresult (lua_State *L, int i, const char *filename) {
+  if (i) {
+    lua_pushboolean(L, 1);
+    return 1;
+  }
+  else {
+    lua_pushnil(L);
+    if (filename)
+      lua_pushfstring(L, "%s: %s", filename, strerror(errno));
+    else
+      lua_pushfstring(L, "%s", strerror(errno));
+    lua_pushnumber(L, errno);
+    return 3;
+  }
+}
+
+
+static FILE **topfile (lua_State *L, int findex) {
+  FILE **f = (FILE **)luaL_checkudata(L, findex, FILEHANDLE);
+  if (f == NULL) luaL_argerror(L, findex, "bad file");
+  return f;
+}
+
+
+static int io_type (lua_State *L) {
+  FILE **f = (FILE **)luaL_checkudata(L, 1, FILEHANDLE);
+  if (f == NULL) lua_pushnil(L);
+  else if (*f == NULL)
+    lua_pushliteral(L, "closed file");
+  else
+    lua_pushliteral(L, "file");
+  return 1;
+}
+
+
+static FILE *tofile (lua_State *L, int findex) {
+  FILE **f = topfile(L, findex);
+  if (*f == NULL)
+    luaL_error(L, "attempt to use a closed file");
+  return *f;
+}
+
+
+
+/*
+** When creating file handles, always creates a `closed' file handle
+** before opening the actual file; so, if there is a memory error, the
+** file is not left opened.
+*/
+static FILE **newfile (lua_State *L) {
+  FILE **pf = (FILE **)lua_newuserdata(L, sizeof(FILE *));
+  *pf = NULL;  /* file handle is currently `closed' */
+  luaL_getmetatable(L, FILEHANDLE);
+  lua_setmetatable(L, -2);
+  return pf;
+}
+
+
+/*
+** assumes that top of the stack is the `io' library, and next is
+** the `io' metatable
+*/
+static void registerfile (lua_State *L, FILE *f, const char *name,
+                                                 const char *impname) {
+  lua_pushstring(L, name);
+  *newfile(L) = f;
+  if (impname) {
+    lua_pushstring(L, impname);
+    lua_pushvalue(L, -2);
+    lua_settable(L, -6);  /* metatable[impname] = file */
+  }
+  lua_settable(L, -3);  /* io[name] = file */
+}
+
+
+static int aux_close (lua_State *L) {
+  FILE *f = tofile(L, 1);
+  if (f == stdin || f == stdout || f == stderr)
+    return 0;  /* file cannot be closed */
+  else {
+    int ok = (pclose(f) != -1) || (fclose(f) == 0);
+    if (ok)
+      *(FILE **)lua_touserdata(L, 1) = NULL;  /* mark file as closed */
+    return ok;
+  }
+}
+
+
+static int io_close (lua_State *L) {
+  if (lua_isnone(L, 1)) {
+    lua_pushstring(L, IO_OUTPUT);
+    lua_rawget(L, lua_upvalueindex(1));
+  }
+  return pushresult(L, aux_close(L), NULL);
+}
+
+
+static int io_gc (lua_State *L) {
+  FILE **f = topfile(L, 1);
+  if (*f != NULL)  /* ignore closed files */
+    aux_close(L);
+  return 0;
+}
+
+
+static int io_tostring (lua_State *L) {
+  char buff[32];
+  FILE **f = topfile(L, 1);
+  if (*f == NULL)
+    strcpy(buff, "closed");
+  else
+    sprintf(buff, "%p", lua_touserdata(L, 1));
+  lua_pushfstring(L, "file (%s)", buff);
+  return 1;
+}
+
+
+static int io_open (lua_State *L) {
+  const char *filename = luaL_checkstring(L, 1);
+  const char *mode = luaL_optstring(L, 2, "r");
+  FILE **pf = newfile(L);
+  *pf = fopen(filename, mode);
+  return (*pf == NULL) ? pushresult(L, 0, filename) : 1;
+}
+
+
+static int io_popen (lua_State *L) {
+#if !USE_POPEN
+  luaL_error(L, "`popen' not supported");
+  return 0;
+#else
+  const char *filename = luaL_checkstring(L, 1);
+  const char *mode = luaL_optstring(L, 2, "r");
+  FILE **pf = newfile(L);
+  *pf = popen(filename, mode);
+  return (*pf == NULL) ? pushresult(L, 0, filename) : 1;
+#endif
+}
+
+
+static int io_tmpfile (lua_State *L) {
+  FILE **pf = newfile(L);
+  *pf = tmpfile();
+  return (*pf == NULL) ? pushresult(L, 0, NULL) : 1;
+}
+
+
+static FILE *getiofile (lua_State *L, const char *name) {
+  lua_pushstring(L, name);
+  lua_rawget(L, lua_upvalueindex(1));
+  return tofile(L, -1);
+}
+
+
+static int g_iofile (lua_State *L, const char *name, const char *mode) {
+  if (!lua_isnoneornil(L, 1)) {
+    const char *filename = lua_tostring(L, 1);
+    lua_pushstring(L, name);
+    if (filename) {
+      FILE **pf = newfile(L);
+      *pf = fopen(filename, mode);
+      if (*pf == NULL) {
+        lua_pushfstring(L, "%s: %s", filename, strerror(errno));
+        luaL_argerror(L, 1, lua_tostring(L, -1));
+      }
+    }
+    else {
+      tofile(L, 1);  /* check that it's a valid file handle */
+      lua_pushvalue(L, 1);
+    }
+    lua_rawset(L, lua_upvalueindex(1));
+  }
+  /* return current value */
+  lua_pushstring(L, name);
+  lua_rawget(L, lua_upvalueindex(1));
+  return 1;
+}
+
+
+static int io_input (lua_State *L) {
+  return g_iofile(L, IO_INPUT, "r");
+}
+
+
+static int io_output (lua_State *L) {
+  return g_iofile(L, IO_OUTPUT, "w");
+}
+
+
+static int io_readline (lua_State *L);
+
+
+static void aux_lines (lua_State *L, int idx, int close) {
+  lua_pushliteral(L, FILEHANDLE);
+  lua_rawget(L, LUA_REGISTRYINDEX);
+  lua_pushvalue(L, idx);
+  lua_pushboolean(L, close);  /* close/not close file when finished */
+  lua_pushcclosure(L, io_readline, 3);
+}
+
+
+static int f_lines (lua_State *L) {
+  tofile(L, 1);  /* check that it's a valid file handle */
+  aux_lines(L, 1, 0);
+  return 1;
+}
+
+
+static int io_lines (lua_State *L) {
+  if (lua_isnoneornil(L, 1)) {  /* no arguments? */
+    lua_pushstring(L, IO_INPUT);
+    lua_rawget(L, lua_upvalueindex(1));  /* will iterate over default input */
+    return f_lines(L);
+  }
+  else {
+    const char *filename = luaL_checkstring(L, 1);
+    FILE **pf = newfile(L);
+    *pf = fopen(filename, "r");
+    luaL_argcheck(L, *pf, 1,  strerror(errno));
+    aux_lines(L, lua_gettop(L), 1);
+    return 1;
+  }
+}
+
+
+/*
+** {======================================================
+** READ
+** =======================================================
+*/
+
+
+static int read_number (lua_State *L, FILE *f) {
+  lua_Number d;
+  if (fscanf(f, LUA_NUMBER_SCAN, &d) == 1) {
+    lua_pushnumber(L, d);
+    return 1;
+  }
+  else return 0;  /* read fails */
+}
+
+
+static int test_eof (lua_State *L, FILE *f) {
+  int c = getc(f);
+  ungetc(c, f);
+  lua_pushlstring(L, NULL, 0);
+  return (c != EOF);
+}
+
+
+static int read_line (lua_State *L, FILE *f) {
+  luaL_Buffer b;
+  luaL_buffinit(L, &b);
+  for (;;) {
+    size_t l;
+    char *p = luaL_prepbuffer(&b);
+    if (fgets(p, LUAL_BUFFERSIZE, f) == NULL) {  /* eof? */
+      luaL_pushresult(&b);  /* close buffer */
+      return (lua_strlen(L, -1) > 0);  /* check whether read something */
+    }
+    l = strlen(p);
+    if (p[l-1] != '\n')
+      luaL_addsize(&b, l);
+    else {
+      luaL_addsize(&b, l - 1);  /* do not include `eol' */
+      luaL_pushresult(&b);  /* close buffer */
+      return 1;  /* read at least an `eol' */
+    }
+  }
+}
+
+
+static int read_chars (lua_State *L, FILE *f, size_t n) {
+  size_t rlen;  /* how much to read */
+  size_t nr;  /* number of chars actually read */
+  luaL_Buffer b;
+  luaL_buffinit(L, &b);
+  rlen = LUAL_BUFFERSIZE;  /* try to read that much each time */
+  do {
+    char *p = luaL_prepbuffer(&b);
+    if (rlen > n) rlen = n;  /* cannot read more than asked */
+    nr = fread(p, sizeof(char), rlen, f);
+    luaL_addsize(&b, nr);
+    n -= nr;  /* still have to read `n' chars */
+  } while (n > 0 && nr == rlen);  /* until end of count or eof */
+  luaL_pushresult(&b);  /* close buffer */
+  return (n == 0 || lua_strlen(L, -1) > 0);
+}
+
+
+static int g_read (lua_State *L, FILE *f, int first) {
+  int nargs = lua_gettop(L) - 1;
+  int success;
+  int n;
+  if (nargs == 0) {  /* no arguments? */
+    success = read_line(L, f);
+    n = first+1;  /* to return 1 result */
+  }
+  else {  /* ensure stack space for all results and for auxlib's buffer */
+    luaL_checkstack(L, nargs+LUA_MINSTACK, "too many arguments");
+    success = 1;
+    for (n = first; nargs-- && success; n++) {
+      if (lua_type(L, n) == LUA_TNUMBER) {
+        size_t l = (size_t)lua_tonumber(L, n);
+        success = (l == 0) ? test_eof(L, f) : read_chars(L, f, l);
+      }
+      else {
+        const char *p = lua_tostring(L, n);
+        luaL_argcheck(L, p && p[0] == '*', n, "invalid option");
+        switch (p[1]) {
+          case 'n':  /* number */
+            success = read_number(L, f);
+            break;
+          case 'l':  /* line */
+            success = read_line(L, f);
+            break;
+          case 'a':  /* file */
+            read_chars(L, f, ~((size_t)0));  /* read MAX_SIZE_T chars */
+            success = 1; /* always success */
+            break;
+          case 'w':  /* word */
+            return luaL_error(L, "obsolete option `*w' to `read'");
+          default:
+            return luaL_argerror(L, n, "invalid format");
+        }
+      }
+    }
+  }
+  if (!success) {
+    lua_pop(L, 1);  /* remove last result */
+    lua_pushnil(L);  /* push nil instead */
+  }
+  return n - first;
+}
+
+
+static int io_read (lua_State *L) {
+  return g_read(L, getiofile(L, IO_INPUT), 1);
+}
+
+
+static int f_read (lua_State *L) {
+  return g_read(L, tofile(L, 1), 2);
+}
+
+
+static int io_readline (lua_State *L) {
+  FILE *f = *(FILE **)lua_touserdata(L, lua_upvalueindex(2));
+  if (f == NULL)  /* file is already closed? */
+    luaL_error(L, "file is already closed");
+  if (read_line(L, f)) return 1;
+  else {  /* EOF */
+    if (lua_toboolean(L, lua_upvalueindex(3))) {  /* generator created file? */
+      lua_settop(L, 0);
+      lua_pushvalue(L, lua_upvalueindex(2));
+      aux_close(L);  /* close it */
+    }
+    return 0;
+  }
+}
+
+/* }====================================================== */
+
+
+static int g_write (lua_State *L, FILE *f, int arg) {
+  int nargs = lua_gettop(L) - 1;
+  int status = 1;
+  for (; nargs--; arg++) {
+    if (lua_type(L, arg) == LUA_TNUMBER) {
+      /* optimization: could be done exactly as for strings */
+      status = status &&
+          fprintf(f, LUA_NUMBER_FMT, lua_tonumber(L, arg)) > 0;
+    }
+    else {
+      size_t l;
+      const char *s = luaL_checklstring(L, arg, &l);
+      status = status && (fwrite(s, sizeof(char), l, f) == l);
+    }
+  }
+  return pushresult(L, status, NULL);
+}
+
+
+static int io_write (lua_State *L) {
+  return g_write(L, getiofile(L, IO_OUTPUT), 1);
+}
+
+
+static int f_write (lua_State *L) {
+  return g_write(L, tofile(L, 1), 2);
+}
+
+
+static int f_seek (lua_State *L) {
+  static const int mode[] = {SEEK_SET, SEEK_CUR, SEEK_END};
+  static const char *const modenames[] = {"set", "cur", "end", NULL};
+  FILE *f = tofile(L, 1);
+  int op = luaL_findstring(luaL_optstring(L, 2, "cur"), modenames);
+  long offset = luaL_optlong(L, 3, 0);
+  luaL_argcheck(L, op != -1, 2, "invalid mode");
+  op = fseek(f, offset, mode[op]);
+  if (op)
+    return pushresult(L, 0, NULL);  /* error */
+  else {
+    lua_pushnumber(L, ftell(f));
+    return 1;
+  }
+}
+
+
+static int io_flush (lua_State *L) {
+  return pushresult(L, fflush(getiofile(L, IO_OUTPUT)) == 0, NULL);
+}
+
+
+static int f_flush (lua_State *L) {
+  return pushresult(L, fflush(tofile(L, 1)) == 0, NULL);
+}
+
+
+static const luaL_reg iolib[] = {
+  {"input", io_input},
+  {"output", io_output},
+  {"lines", io_lines},
+  {"close", io_close},
+  {"flush", io_flush},
+  {"open", io_open},
+  {"popen", io_popen},
+  {"read", io_read},
+  {"tmpfile", io_tmpfile},
+  {"type", io_type},
+  {"write", io_write},
+  {NULL, NULL}
+};
+
+
+static const luaL_reg flib[] = {
+  {"flush", f_flush},
+  {"read", f_read},
+  {"lines", f_lines},
+  {"seek", f_seek},
+  {"write", f_write},
+  {"close", io_close},
+  {"__gc", io_gc},
+  {"__tostring", io_tostring},
+  {NULL, NULL}
+};
+
+
+static void createmeta (lua_State *L) {
+  luaL_newmetatable(L, FILEHANDLE);  /* create new metatable for file handles */
+  /* file methods */
+  lua_pushliteral(L, "__index");
+  lua_pushvalue(L, -2);  /* push metatable */
+  lua_rawset(L, -3);  /* metatable.__index = metatable */
+  luaL_openlib(L, NULL, flib, 0);
+}
+
+/* }====================================================== */
+
+
+/*
+** {======================================================
+** Other O.S. Operations
+** =======================================================
+*/
+
+static int io_execute (lua_State *L) {
+  lua_pushnumber(L, system(luaL_checkstring(L, 1)));
+  return 1;
+}
+
+
+static int io_remove (lua_State *L) {
+  const char *filename = luaL_checkstring(L, 1);
+  return pushresult(L, remove(filename) == 0, filename);
+}
+
+
+static int io_rename (lua_State *L) {
+  const char *fromname = luaL_checkstring(L, 1);
+  const char *toname = luaL_checkstring(L, 2);
+  return pushresult(L, rename(fromname, toname) == 0, fromname);
+}
+
+
+static int io_tmpname (lua_State *L) {
+#if !USE_TMPNAME
+  luaL_error(L, "`tmpname' not supported");
+  return 0;
+#else
+  char buff[L_tmpnam];
+  if (tmpnam(buff) != buff)
+    return luaL_error(L, "unable to generate a unique filename in `tmpname'");
+  lua_pushstring(L, buff);
+  return 1;
+#endif
+}
+
+
+static int io_getenv (lua_State *L) {
+  lua_pushstring(L, getenv(luaL_checkstring(L, 1)));  /* if NULL push nil */
+  return 1;
+}
+
+
+static int io_clock (lua_State *L) {
+  lua_pushnumber(L, ((lua_Number)clock())/(lua_Number)CLOCKS_PER_SEC);
+  return 1;
+}
+
+
+/*
+** {======================================================
+** Time/Date operations
+** { year=%Y, month=%m, day=%d, hour=%H, min=%M, sec=%S,
+**   wday=%w+1, yday=%j, isdst=? }
+** =======================================================
+*/
+
+static void setfield (lua_State *L, const char *key, int value) {
+  lua_pushstring(L, key);
+  lua_pushnumber(L, value);
+  lua_rawset(L, -3);
+}
+
+static void setboolfield (lua_State *L, const char *key, int value) {
+  lua_pushstring(L, key);
+  lua_pushboolean(L, value);
+  lua_rawset(L, -3);
+}
+
+static int getboolfield (lua_State *L, const char *key) {
+  int res;
+  lua_pushstring(L, key);
+  lua_gettable(L, -2);
+  res = lua_toboolean(L, -1);
+  lua_pop(L, 1);
+  return res;
+}
+
+
+static int getfield (lua_State *L, const char *key, int d) {
+  int res;
+  lua_pushstring(L, key);
+  lua_gettable(L, -2);
+  if (lua_isnumber(L, -1))
+    res = (int)(lua_tonumber(L, -1));
+  else {
+    if (d == -2)
+      return luaL_error(L, "field `%s' missing in date table", key);
+    res = d;
+  }
+  lua_pop(L, 1);
+  return res;
+}
+
+
+static int io_date (lua_State *L) {
+  const char *s = luaL_optstring(L, 1, "%c");
+  time_t t = (time_t)(luaL_optnumber(L, 2, -1));
+  struct tm *stm;
+  if (t == (time_t)(-1))  /* no time given? */
+    t = time(NULL);  /* use current time */
+  if (*s == '!') {  /* UTC? */
+    stm = gmtime(&t);
+    s++;  /* skip `!' */
+  }
+  else
+    stm = localtime(&t);
+  if (stm == NULL)  /* invalid date? */
+    lua_pushnil(L);
+  else if (strcmp(s, "*t") == 0) {
+    lua_newtable(L);
+    setfield(L, "sec", stm->tm_sec);
+    setfield(L, "min", stm->tm_min);
+    setfield(L, "hour", stm->tm_hour);
+    setfield(L, "day", stm->tm_mday);
+    setfield(L, "month", stm->tm_mon+1);
+    setfield(L, "year", stm->tm_year+1900);
+    setfield(L, "wday", stm->tm_wday+1);
+    setfield(L, "yday", stm->tm_yday+1);
+    setboolfield(L, "isdst", stm->tm_isdst);
+  }
+  else {
+    char b[256];
+    if (strftime(b, sizeof(b), s, stm))
+      lua_pushstring(L, b);
+    else
+      return luaL_error(L, "`date' format too long");
+  }
+  return 1;
+}
+
+
+static int io_time (lua_State *L) {
+  if (lua_isnoneornil(L, 1))  /* called without args? */
+    lua_pushnumber(L, time(NULL));  /* return current time */
+  else {
+    time_t t;
+    struct tm ts;
+    luaL_checktype(L, 1, LUA_TTABLE);
+    lua_settop(L, 1);  /* make sure table is at the top */
+    ts.tm_sec = getfield(L, "sec", 0);
+    ts.tm_min = getfield(L, "min", 0);
+    ts.tm_hour = getfield(L, "hour", 12);
+    ts.tm_mday = getfield(L, "day", -2);
+    ts.tm_mon = getfield(L, "month", -2) - 1;
+    ts.tm_year = getfield(L, "year", -2) - 1900;
+    ts.tm_isdst = getboolfield(L, "isdst");
+    t = mktime(&ts);
+    if (t == (time_t)(-1))
+      lua_pushnil(L);
+    else
+      lua_pushnumber(L, t);
+  }
+  return 1;
+}
+
+
+static int io_difftime (lua_State *L) {
+  lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)),
+                             (time_t)(luaL_optnumber(L, 2, 0))));
+  return 1;
+}
+
+/* }====================================================== */
+
+
+static int io_setloc (lua_State *L) {
+  static const int cat[] = {LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY,
+                      LC_NUMERIC, LC_TIME};
+  static const char *const catnames[] = {"all", "collate", "ctype", "monetary",
+     "numeric", "time", NULL};
+  const char *l = lua_tostring(L, 1);
+  int op = luaL_findstring(luaL_optstring(L, 2, "all"), catnames);
+  luaL_argcheck(L, l || lua_isnoneornil(L, 1), 1, "string expected");
+  luaL_argcheck(L, op != -1, 2, "invalid option");
+  lua_pushstring(L, setlocale(cat[op], l));
+  return 1;
+}
+
+
+static int io_exit (lua_State *L) {
+  exit(luaL_optint(L, 1, EXIT_SUCCESS));
+  return 0;  /* to avoid warnings */
+}
+
+static const luaL_reg syslib[] = {
+  {"clock",     io_clock},
+  {"date",      io_date},
+  {"difftime",  io_difftime},
+  {"execute",   io_execute},
+  {"exit",      io_exit},
+  {"getenv",    io_getenv},
+  {"remove",    io_remove},
+  {"rename",    io_rename},
+  {"setlocale", io_setloc},
+  {"time",      io_time},
+  {"tmpname",   io_tmpname},
+  {NULL, NULL}
+};
+
+/* }====================================================== */
+
+
+
+LUALIB_API int luaopen_io (lua_State *L) {
+  luaL_openlib(L, LUA_OSLIBNAME, syslib, 0);
+  createmeta(L);
+  lua_pushvalue(L, -1);
+  luaL_openlib(L, LUA_IOLIBNAME, iolib, 1);
+  /* put predefined file handles into `io' table */
+  registerfile(L, stdin, "stdin", IO_INPUT);
+  registerfile(L, stdout, "stdout", IO_OUTPUT);
+  registerfile(L, stderr, "stderr", NULL);
+  return 1;
+}
+
diff --git a/lib/lua/src/LuaLib/lmathlib.c b/lib/lua/src/LuaLib/lmathlib.c
index 2352fca..998c46c 100644
--- a/lib/lua/src/LuaLib/lmathlib.c
+++ b/lib/lua/src/LuaLib/lmathlib.c
@@ -1,246 +1,246 @@
-/*

-** $Id: lmathlib.c,v 1.3 2004-11-27 21:35:21 pixel Exp $

-** Standard mathematical library

-** See Copyright Notice in lua.h

-*/

-

-

-#include <stdlib.h>

-#include <math.h>

-

-#define lmathlib_c

-

-#include "lua.h"

-

-#include "lauxlib.h"

-#include "lualib.h"

-

-

-#undef PI

-#define PI (3.14159265358979323846)

-#define RADIANS_PER_DEGREE (PI/180.0)

-

-

-

-/*

-** If you want Lua to operate in degrees (instead of radians),

-** define USE_DEGREES

-*/

-#ifdef USE_DEGREES

-#define FROMRAD(a)	((a)/RADIANS_PER_DEGREE)

-#define TORAD(a)	((a)*RADIANS_PER_DEGREE)

-#else

-#define FROMRAD(a)	(a)

-#define TORAD(a)	(a)

-#endif

-

-

-static int math_abs (lua_State *L) {

-  lua_pushnumber(L, fabs(luaL_checknumber(L, 1)));

-  return 1;

-}

-

-static int math_sin (lua_State *L) {

-  lua_pushnumber(L, sin(TORAD(luaL_checknumber(L, 1))));

-  return 1;

-}

-

-static int math_cos (lua_State *L) {

-  lua_pushnumber(L, cos(TORAD(luaL_checknumber(L, 1))));

-  return 1;

-}

-

-static int math_tan (lua_State *L) {

-  lua_pushnumber(L, tan(TORAD(luaL_checknumber(L, 1))));

-  return 1;

-}

-

-static int math_asin (lua_State *L) {

-  lua_pushnumber(L, FROMRAD(asin(luaL_checknumber(L, 1))));

-  return 1;

-}

-

-static int math_acos (lua_State *L) {

-  lua_pushnumber(L, FROMRAD(acos(luaL_checknumber(L, 1))));

-  return 1;

-}

-

-static int math_atan (lua_State *L) {

-  lua_pushnumber(L, FROMRAD(atan(luaL_checknumber(L, 1))));

-  return 1;

-}

-

-static int math_atan2 (lua_State *L) {

-  lua_pushnumber(L, FROMRAD(atan2(luaL_checknumber(L, 1), luaL_checknumber(L, 2))));

-  return 1;

-}

-

-static int math_ceil (lua_State *L) {

-  lua_pushnumber(L, ceil(luaL_checknumber(L, 1)));

-  return 1;

-}

-

-static int math_floor (lua_State *L) {

-  lua_pushnumber(L, floor(luaL_checknumber(L, 1)));

-  return 1;

-}

-

-static int math_mod (lua_State *L) {

-  lua_pushnumber(L, fmod(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));

-  return 1;

-}

-

-static int math_sqrt (lua_State *L) {

-  lua_pushnumber(L, sqrt(luaL_checknumber(L, 1)));

-  return 1;

-}

-

-static int math_pow (lua_State *L) {

-  lua_pushnumber(L, pow(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));

-  return 1;

-}

-

-static int math_log (lua_State *L) {

-  lua_pushnumber(L, log(luaL_checknumber(L, 1)));

-  return 1;

-}

-

-static int math_log10 (lua_State *L) {

-  lua_pushnumber(L, log10(luaL_checknumber(L, 1)));

-  return 1;

-}

-

-static int math_exp (lua_State *L) {

-  lua_pushnumber(L, exp(luaL_checknumber(L, 1)));

-  return 1;

-}

-

-static int math_deg (lua_State *L) {

-  lua_pushnumber(L, luaL_checknumber(L, 1)/RADIANS_PER_DEGREE);

-  return 1;

-}

-

-static int math_rad (lua_State *L) {

-  lua_pushnumber(L, luaL_checknumber(L, 1)*RADIANS_PER_DEGREE);

-  return 1;

-}

-

-static int math_frexp (lua_State *L) {

-  int e;

-  lua_pushnumber(L, frexp(luaL_checknumber(L, 1), &e));

-  lua_pushnumber(L, e);

-  return 2;

-}

-

-static int math_ldexp (lua_State *L) {

-  lua_pushnumber(L, ldexp(luaL_checknumber(L, 1), luaL_checkint(L, 2)));

-  return 1;

-}

-

-

-

-static int math_min (lua_State *L) {

-  int n = lua_gettop(L);  /* number of arguments */

-  lua_Number dmin = luaL_checknumber(L, 1);

-  int i;

-  for (i=2; i<=n; i++) {

-    lua_Number d = luaL_checknumber(L, i);

-    if (d < dmin)

-      dmin = d;

-  }

-  lua_pushnumber(L, dmin);

-  return 1;

-}

-

-

-static int math_max (lua_State *L) {

-  int n = lua_gettop(L);  /* number of arguments */

-  lua_Number dmax = luaL_checknumber(L, 1);

-  int i;

-  for (i=2; i<=n; i++) {

-    lua_Number d = luaL_checknumber(L, i);

-    if (d > dmax)

-      dmax = d;

-  }

-  lua_pushnumber(L, dmax);

-  return 1;

-}

-

-

-static int math_random (lua_State *L) {

-  /* the `%' avoids the (rare) case of r==1, and is needed also because on

-     some systems (SunOS!) `rand()' may return a value larger than RAND_MAX */

-  lua_Number r = (lua_Number)(rand()%RAND_MAX) / (lua_Number)RAND_MAX;

-  switch (lua_gettop(L)) {  /* check number of arguments */

-    case 0: {  /* no arguments */

-      lua_pushnumber(L, r);  /* Number between 0 and 1 */

-      break;

-    }

-    case 1: {  /* only upper limit */

-      int u = luaL_checkint(L, 1);

-      luaL_argcheck(L, 1<=u, 1, "interval is empty");

-      lua_pushnumber(L, (int)floor(r*u)+1);  /* int between 1 and `u' */

-      break;

-    }

-    case 2: {  /* lower and upper limits */

-      int l = luaL_checkint(L, 1);

-      int u = luaL_checkint(L, 2);

-      luaL_argcheck(L, l<=u, 2, "interval is empty");

-      lua_pushnumber(L, (int)floor(r*(u-l+1))+l);  /* int between `l' and `u' */

-      break;

-    }

-    default: return luaL_error(L, "wrong number of arguments");

-  }

-  return 1;

-}

-

-

-static int math_randomseed (lua_State *L) {

-  srand(luaL_checkint(L, 1));

-  return 0;

-}

-

-

-static const luaL_reg mathlib[] = {

-  {"abs",   math_abs},

-  {"sin",   math_sin},

-  {"cos",   math_cos},

-  {"tan",   math_tan},

-  {"asin",  math_asin},

-  {"acos",  math_acos},

-  {"atan",  math_atan},

-  {"atan2", math_atan2},

-  {"ceil",  math_ceil},

-  {"floor", math_floor},

-  {"mod",   math_mod},

-  {"frexp", math_frexp},

-  {"ldexp", math_ldexp},

-  {"sqrt",  math_sqrt},

-  {"min",   math_min},

-  {"max",   math_max},

-  {"log",   math_log},

-  {"log10", math_log10},

-  {"exp",   math_exp},

-  {"deg",   math_deg},

-  {"pow",   math_pow},

-  {"rad",   math_rad},

-  {"random",     math_random},

-  {"randomseed", math_randomseed},

-  {NULL, NULL}

-};

-

-

-/*

-** Open math library

-*/

-LUALIB_API int luaopen_math (lua_State *L) {

-  luaL_openlib(L, LUA_MATHLIBNAME, mathlib, 0);

-  lua_pushliteral(L, "pi");

-  lua_pushnumber(L, PI);

-  lua_settable(L, -3);

-  lua_pushliteral(L, "__pow");

-  lua_pushcfunction(L, math_pow);

-  lua_settable(L, LUA_GLOBALSINDEX);

-  return 1;

-}

-

+/*
+** $Id: lmathlib.c,v 1.4 2004-11-27 21:46:10 pixel Exp $
+** Standard mathematical library
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdlib.h>
+#include <math.h>
+
+#define lmathlib_c
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+#undef PI
+#define PI (3.14159265358979323846)
+#define RADIANS_PER_DEGREE (PI/180.0)
+
+
+
+/*
+** If you want Lua to operate in degrees (instead of radians),
+** define USE_DEGREES
+*/
+#ifdef USE_DEGREES
+#define FROMRAD(a)	((a)/RADIANS_PER_DEGREE)
+#define TORAD(a)	((a)*RADIANS_PER_DEGREE)
+#else
+#define FROMRAD(a)	(a)
+#define TORAD(a)	(a)
+#endif
+
+
+static int math_abs (lua_State *L) {
+  lua_pushnumber(L, fabs(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_sin (lua_State *L) {
+  lua_pushnumber(L, sin(TORAD(luaL_checknumber(L, 1))));
+  return 1;
+}
+
+static int math_cos (lua_State *L) {
+  lua_pushnumber(L, cos(TORAD(luaL_checknumber(L, 1))));
+  return 1;
+}
+
+static int math_tan (lua_State *L) {
+  lua_pushnumber(L, tan(TORAD(luaL_checknumber(L, 1))));
+  return 1;
+}
+
+static int math_asin (lua_State *L) {
+  lua_pushnumber(L, FROMRAD(asin(luaL_checknumber(L, 1))));
+  return 1;
+}
+
+static int math_acos (lua_State *L) {
+  lua_pushnumber(L, FROMRAD(acos(luaL_checknumber(L, 1))));
+  return 1;
+}
+
+static int math_atan (lua_State *L) {
+  lua_pushnumber(L, FROMRAD(atan(luaL_checknumber(L, 1))));
+  return 1;
+}
+
+static int math_atan2 (lua_State *L) {
+  lua_pushnumber(L, FROMRAD(atan2(luaL_checknumber(L, 1), luaL_checknumber(L, 2))));
+  return 1;
+}
+
+static int math_ceil (lua_State *L) {
+  lua_pushnumber(L, ceil(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_floor (lua_State *L) {
+  lua_pushnumber(L, floor(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_mod (lua_State *L) {
+  lua_pushnumber(L, fmod(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
+  return 1;
+}
+
+static int math_sqrt (lua_State *L) {
+  lua_pushnumber(L, sqrt(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_pow (lua_State *L) {
+  lua_pushnumber(L, pow(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
+  return 1;
+}
+
+static int math_log (lua_State *L) {
+  lua_pushnumber(L, log(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_log10 (lua_State *L) {
+  lua_pushnumber(L, log10(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_exp (lua_State *L) {
+  lua_pushnumber(L, exp(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_deg (lua_State *L) {
+  lua_pushnumber(L, luaL_checknumber(L, 1)/RADIANS_PER_DEGREE);
+  return 1;
+}
+
+static int math_rad (lua_State *L) {
+  lua_pushnumber(L, luaL_checknumber(L, 1)*RADIANS_PER_DEGREE);
+  return 1;
+}
+
+static int math_frexp (lua_State *L) {
+  int e;
+  lua_pushnumber(L, frexp(luaL_checknumber(L, 1), &e));
+  lua_pushnumber(L, e);
+  return 2;
+}
+
+static int math_ldexp (lua_State *L) {
+  lua_pushnumber(L, ldexp(luaL_checknumber(L, 1), luaL_checkint(L, 2)));
+  return 1;
+}
+
+
+
+static int math_min (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  lua_Number dmin = luaL_checknumber(L, 1);
+  int i;
+  for (i=2; i<=n; i++) {
+    lua_Number d = luaL_checknumber(L, i);
+    if (d < dmin)
+      dmin = d;
+  }
+  lua_pushnumber(L, dmin);
+  return 1;
+}
+
+
+static int math_max (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  lua_Number dmax = luaL_checknumber(L, 1);
+  int i;
+  for (i=2; i<=n; i++) {
+    lua_Number d = luaL_checknumber(L, i);
+    if (d > dmax)
+      dmax = d;
+  }
+  lua_pushnumber(L, dmax);
+  return 1;
+}
+
+
+static int math_random (lua_State *L) {
+  /* the `%' avoids the (rare) case of r==1, and is needed also because on
+     some systems (SunOS!) `rand()' may return a value larger than RAND_MAX */
+  lua_Number r = (lua_Number)(rand()%RAND_MAX) / (lua_Number)RAND_MAX;
+  switch (lua_gettop(L)) {  /* check number of arguments */
+    case 0: {  /* no arguments */
+      lua_pushnumber(L, r);  /* Number between 0 and 1 */
+      break;
+    }
+    case 1: {  /* only upper limit */
+      int u = luaL_checkint(L, 1);
+      luaL_argcheck(L, 1<=u, 1, "interval is empty");
+      lua_pushnumber(L, (int)floor(r*u)+1);  /* int between 1 and `u' */
+      break;
+    }
+    case 2: {  /* lower and upper limits */
+      int l = luaL_checkint(L, 1);
+      int u = luaL_checkint(L, 2);
+      luaL_argcheck(L, l<=u, 2, "interval is empty");
+      lua_pushnumber(L, (int)floor(r*(u-l+1))+l);  /* int between `l' and `u' */
+      break;
+    }
+    default: return luaL_error(L, "wrong number of arguments");
+  }
+  return 1;
+}
+
+
+static int math_randomseed (lua_State *L) {
+  srand(luaL_checkint(L, 1));
+  return 0;
+}
+
+
+static const luaL_reg mathlib[] = {
+  {"abs",   math_abs},
+  {"sin",   math_sin},
+  {"cos",   math_cos},
+  {"tan",   math_tan},
+  {"asin",  math_asin},
+  {"acos",  math_acos},
+  {"atan",  math_atan},
+  {"atan2", math_atan2},
+  {"ceil",  math_ceil},
+  {"floor", math_floor},
+  {"mod",   math_mod},
+  {"frexp", math_frexp},
+  {"ldexp", math_ldexp},
+  {"sqrt",  math_sqrt},
+  {"min",   math_min},
+  {"max",   math_max},
+  {"log",   math_log},
+  {"log10", math_log10},
+  {"exp",   math_exp},
+  {"deg",   math_deg},
+  {"pow",   math_pow},
+  {"rad",   math_rad},
+  {"random",     math_random},
+  {"randomseed", math_randomseed},
+  {NULL, NULL}
+};
+
+
+/*
+** Open math library
+*/
+LUALIB_API int luaopen_math (lua_State *L) {
+  luaL_openlib(L, LUA_MATHLIBNAME, mathlib, 0);
+  lua_pushliteral(L, "pi");
+  lua_pushnumber(L, PI);
+  lua_settable(L, -3);
+  lua_pushliteral(L, "__pow");
+  lua_pushcfunction(L, math_pow);
+  lua_settable(L, LUA_GLOBALSINDEX);
+  return 1;
+}
+
diff --git a/lib/lua/src/LuaLib/loadlib.c b/lib/lua/src/LuaLib/loadlib.c
index dc83283..8756205 100644
--- a/lib/lua/src/LuaLib/loadlib.c
+++ b/lib/lua/src/LuaLib/loadlib.c
@@ -1,205 +1,205 @@
-/*

-** $Id: loadlib.c,v 1.3 2004-11-27 21:35:21 pixel Exp $

-** Dynamic library loader for Lua

-** See Copyright Notice in lua.h

-*

-* This  Lua library  exports a  single function,  called loadlib,  which is

-* called from Lua  as loadlib(lib,init), where lib is the  full name of the

-* library to be  loaded (including the complete path) and  init is the name

-* of a function  to be called after the library  is loaded. Typically, this

-* function will register other functions,  thus making the complete library

-* available  to Lua.  The init  function is  *not* automatically  called by

-* loadlib. Instead,  loadlib returns  the init function  as a  Lua function

-* that the client  can call when it  thinks is appropriate. In  the case of

-* errors,  loadlib  returns  nil  and two  strings  describing  the  error.

-* The  first string  is  supplied by  the operating  system;  it should  be

-* informative and useful  for error messages. The second  string is "open",

-* "init", or  "absent" to identify  the error and is  meant to be  used for

-* making  decisions without  having to  look into  the first  string (whose

-* format is system-dependent).

-*

-* This module contains  an implementation of loadlib for  Unix systems that

-* have dlfcn, an implementation for Windows,  and a stub for other systems.

-* See  the list  at  the end  of  this  file for  some  links to  available

-* implementations of dlfcn  and interfaces to other  native dynamic loaders

-* on top of which loadlib could be implemented.

-*

-*/

-

-#include "lua.h"

-#include "lauxlib.h"

-#include "lualib.h"

-

-

-#undef LOADLIB

-

-

-#ifdef USE_DLOPEN

-#define LOADLIB

-/*

-* This is an implementation of loadlib based on the dlfcn interface.

-* The dlfcn interface is available in Linux, SunOS, Solaris, IRIX, FreeBSD,

-* NetBSD, AIX 4.2, HPUX 11, and  probably most other Unix flavors, at least

-* as an emulation layer on top of native functions.

-*/

-

-#include <dlfcn.h>

-

-static int loadlib(lua_State *L)

-{

- const char *path=luaL_checkstring(L,1);

- const char *init=luaL_checkstring(L,2);

- void *lib=dlopen(path,RTLD_NOW);

- if (lib!=NULL)

- {

-  lua_CFunction f=(lua_CFunction) dlsym(lib,init);

-  if (f!=NULL)

-  {

-   lua_pushlightuserdata(L,lib);

-   lua_pushcclosure(L,f,1);

-   return 1;

-  }

- }

- /* else return appropriate error messages */

- lua_pushnil(L);

- lua_pushstring(L,dlerror());

- lua_pushstring(L,(lib!=NULL) ? "init" : "open");

- if (lib!=NULL) dlclose(lib);

- return 3;

-}

-

-#endif

-

-

-

-/*

-** In Windows, default is to use dll; otherwise, default is not to use dll

-*/

-#ifndef USE_DLL

-#ifdef _WIN32

-#define USE_DLL	1

-#else

-#define USE_DLL	0

-#endif

-#endif

-

-

-#if USE_DLL

-#define LOADLIB

-/*

-* This is an implementation of loadlib for Windows using native functions.

-*/

-

-#include <windows.h>

-

-static void pusherror(lua_State *L)

-{

- int error=GetLastError();

- char buffer[128];

- if (FormatMessage(FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM,

-	0, error, 0, buffer, sizeof(buffer), 0))

-  lua_pushstring(L,buffer);

- else

-  lua_pushfstring(L,"system error %d\n",error);

-}

-

-static int loadlib(lua_State *L)

-{

- const char *path=luaL_checkstring(L,1);

- const char *init=luaL_checkstring(L,2);

- HINSTANCE lib=LoadLibrary(path);

- if (lib!=NULL)

- {

-  lua_CFunction f=(lua_CFunction) GetProcAddress(lib,init);

-  if (f!=NULL)

-  {

-   lua_pushlightuserdata(L,lib);

-   lua_pushcclosure(L,f,1);

-   return 1;

-  }

- }

- lua_pushnil(L);

- pusherror(L);

- lua_pushstring(L,(lib!=NULL) ? "init" : "open");

- if (lib!=NULL) FreeLibrary(lib);

- return 3;

-}

-

-#endif

-

-

-

-#ifndef LOADLIB

-/* Fallback for other systems */

-

-/*

-** Those systems support dlopen, so they should have defined USE_DLOPEN.

-** The default (no)implementation gives them a special error message.

-*/

-#ifdef linux

-#define LOADLIB

-#endif

-

-#ifdef sun

-#define LOADLIB

-#endif

-

-#ifdef sgi

-#define LOADLIB

-#endif

-

-#ifdef BSD

-#define LOADLIB

-#endif

-

-#ifdef _WIN32

-#define LOADLIB

-#endif

-

-#ifdef LOADLIB

-#undef LOADLIB

-#define LOADLIB	"`loadlib' not installed (check your Lua configuration)"

-#else

-#define LOADLIB	"`loadlib' not supported"

-#endif

-

-static int loadlib(lua_State *L)

-{

- lua_pushnil(L);

- lua_pushliteral(L,LOADLIB);

- lua_pushliteral(L,"absent");

- return 3;

-}

-#endif

-

-LUALIB_API int luaopen_loadlib (lua_State *L)

-{

- lua_register(L,"loadlib",loadlib);

- return 0;

-}

-

-/*

-* Here are some links to available implementations of dlfcn and

-* interfaces to other native dynamic loaders on top of which loadlib

-* could be implemented. Please send contributions and corrections to us.

-*

-* AIX

-* Starting with AIX 4.2, dlfcn is included in the base OS.

-* There is also an emulation package available.

-* http://www.faqs.org/faqs/aix-faq/part4/section-21.html

-*

-* HPUX 

-* HPUX 11 has dlfcn. For HPUX 10 use shl_*.

-* http://www.geda.seul.org/mailinglist/geda-dev37/msg00094.html

-* http://www.stat.umn.edu/~luke/xls/projects/dlbasics/dlbasics.html

-*

-* Macintosh, Windows

-* http://www.stat.umn.edu/~luke/xls/projects/dlbasics/dlbasics.html

-*

-* Mac OS X/Darwin

-* http://www.opendarwin.org/projects/dlcompat/

-*

-* GLIB has wrapper code for BeOS, OS2, Unix and Windows

-* http://cvs.gnome.org/lxr/source/glib/gmodule/

-*

-*/

+/*
+** $Id: loadlib.c,v 1.4 2004-11-27 21:46:10 pixel Exp $
+** Dynamic library loader for Lua
+** See Copyright Notice in lua.h
+*
+* This  Lua library  exports a  single function,  called loadlib,  which is
+* called from Lua  as loadlib(lib,init), where lib is the  full name of the
+* library to be  loaded (including the complete path) and  init is the name
+* of a function  to be called after the library  is loaded. Typically, this
+* function will register other functions,  thus making the complete library
+* available  to Lua.  The init  function is  *not* automatically  called by
+* loadlib. Instead,  loadlib returns  the init function  as a  Lua function
+* that the client  can call when it  thinks is appropriate. In  the case of
+* errors,  loadlib  returns  nil  and two  strings  describing  the  error.
+* The  first string  is  supplied by  the operating  system;  it should  be
+* informative and useful  for error messages. The second  string is "open",
+* "init", or  "absent" to identify  the error and is  meant to be  used for
+* making  decisions without  having to  look into  the first  string (whose
+* format is system-dependent).
+*
+* This module contains  an implementation of loadlib for  Unix systems that
+* have dlfcn, an implementation for Windows,  and a stub for other systems.
+* See  the list  at  the end  of  this  file for  some  links to  available
+* implementations of dlfcn  and interfaces to other  native dynamic loaders
+* on top of which loadlib could be implemented.
+*
+*/
+
+#include "lua.h"
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+#undef LOADLIB
+
+
+#ifdef USE_DLOPEN
+#define LOADLIB
+/*
+* This is an implementation of loadlib based on the dlfcn interface.
+* The dlfcn interface is available in Linux, SunOS, Solaris, IRIX, FreeBSD,
+* NetBSD, AIX 4.2, HPUX 11, and  probably most other Unix flavors, at least
+* as an emulation layer on top of native functions.
+*/
+
+#include <dlfcn.h>
+
+static int loadlib(lua_State *L)
+{
+ const char *path=luaL_checkstring(L,1);
+ const char *init=luaL_checkstring(L,2);
+ void *lib=dlopen(path,RTLD_NOW);
+ if (lib!=NULL)
+ {
+  lua_CFunction f=(lua_CFunction) dlsym(lib,init);
+  if (f!=NULL)
+  {
+   lua_pushlightuserdata(L,lib);
+   lua_pushcclosure(L,f,1);
+   return 1;
+  }
+ }
+ /* else return appropriate error messages */
+ lua_pushnil(L);
+ lua_pushstring(L,dlerror());
+ lua_pushstring(L,(lib!=NULL) ? "init" : "open");
+ if (lib!=NULL) dlclose(lib);
+ return 3;
+}
+
+#endif
+
+
+
+/*
+** In Windows, default is to use dll; otherwise, default is not to use dll
+*/
+#ifndef USE_DLL
+#ifdef _WIN32
+#define USE_DLL	1
+#else
+#define USE_DLL	0
+#endif
+#endif
+
+
+#if USE_DLL
+#define LOADLIB
+/*
+* This is an implementation of loadlib for Windows using native functions.
+*/
+
+#include <windows.h>
+
+static void pusherror(lua_State *L)
+{
+ int error=GetLastError();
+ char buffer[128];
+ if (FormatMessage(FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM,
+	0, error, 0, buffer, sizeof(buffer), 0))
+  lua_pushstring(L,buffer);
+ else
+  lua_pushfstring(L,"system error %d\n",error);
+}
+
+static int loadlib(lua_State *L)
+{
+ const char *path=luaL_checkstring(L,1);
+ const char *init=luaL_checkstring(L,2);
+ HINSTANCE lib=LoadLibrary(path);
+ if (lib!=NULL)
+ {
+  lua_CFunction f=(lua_CFunction) GetProcAddress(lib,init);
+  if (f!=NULL)
+  {
+   lua_pushlightuserdata(L,lib);
+   lua_pushcclosure(L,f,1);
+   return 1;
+  }
+ }
+ lua_pushnil(L);
+ pusherror(L);
+ lua_pushstring(L,(lib!=NULL) ? "init" : "open");
+ if (lib!=NULL) FreeLibrary(lib);
+ return 3;
+}
+
+#endif
+
+
+
+#ifndef LOADLIB
+/* Fallback for other systems */
+
+/*
+** Those systems support dlopen, so they should have defined USE_DLOPEN.
+** The default (no)implementation gives them a special error message.
+*/
+#ifdef linux
+#define LOADLIB
+#endif
+
+#ifdef sun
+#define LOADLIB
+#endif
+
+#ifdef sgi
+#define LOADLIB
+#endif
+
+#ifdef BSD
+#define LOADLIB
+#endif
+
+#ifdef _WIN32
+#define LOADLIB
+#endif
+
+#ifdef LOADLIB
+#undef LOADLIB
+#define LOADLIB	"`loadlib' not installed (check your Lua configuration)"
+#else
+#define LOADLIB	"`loadlib' not supported"
+#endif
+
+static int loadlib(lua_State *L)
+{
+ lua_pushnil(L);
+ lua_pushliteral(L,LOADLIB);
+ lua_pushliteral(L,"absent");
+ return 3;
+}
+#endif
+
+LUALIB_API int luaopen_loadlib (lua_State *L)
+{
+ lua_register(L,"loadlib",loadlib);
+ return 0;
+}
+
+/*
+* Here are some links to available implementations of dlfcn and
+* interfaces to other native dynamic loaders on top of which loadlib
+* could be implemented. Please send contributions and corrections to us.
+*
+* AIX
+* Starting with AIX 4.2, dlfcn is included in the base OS.
+* There is also an emulation package available.
+* http://www.faqs.org/faqs/aix-faq/part4/section-21.html
+*
+* HPUX 
+* HPUX 11 has dlfcn. For HPUX 10 use shl_*.
+* http://www.geda.seul.org/mailinglist/geda-dev37/msg00094.html
+* http://www.stat.umn.edu/~luke/xls/projects/dlbasics/dlbasics.html
+*
+* Macintosh, Windows
+* http://www.stat.umn.edu/~luke/xls/projects/dlbasics/dlbasics.html
+*
+* Mac OS X/Darwin
+* http://www.opendarwin.org/projects/dlcompat/
+*
+* GLIB has wrapper code for BeOS, OS2, Unix and Windows
+* http://cvs.gnome.org/lxr/source/glib/gmodule/
+*
+*/
diff --git a/lib/lua/src/LuaLib/lstrlib.c b/lib/lua/src/LuaLib/lstrlib.c
index 9b5fe8a..2e5f26e 100644
--- a/lib/lua/src/LuaLib/lstrlib.c
+++ b/lib/lua/src/LuaLib/lstrlib.c
@@ -1,770 +1,770 @@
-/*

-** $Id: lstrlib.c,v 1.3 2004-11-27 21:35:21 pixel Exp $

-** Standard library for string operations and pattern-matching

-** See Copyright Notice in lua.h

-*/

-

-

-#include <ctype.h>

-#include <stddef.h>

-#include <stdio.h>

-#include <stdlib.h>

-#include <string.h>

-

-#define lstrlib_c

-

-#include "lua.h"

-

-#include "lauxlib.h"

-#include "lualib.h"

-

-

-/* macro to `unsign' a character */

-#ifndef uchar

-#define uchar(c)        ((unsigned char)(c))

-#endif

-

-

-typedef long sint32;	/* a signed version for size_t */

-

-

-static int str_len (lua_State *L) {

-  size_t l;

-  luaL_checklstring(L, 1, &l);

-  lua_pushnumber(L, (lua_Number)l);

-  return 1;

-}

-

-

-static sint32 posrelat (sint32 pos, size_t len) {

-  /* relative string position: negative means back from end */

-  return (pos>=0) ? pos : (sint32)len+pos+1;

-}

-

-

-static int str_sub (lua_State *L) {

-  size_t l;

-  const char *s = luaL_checklstring(L, 1, &l);

-  sint32 start = posrelat(luaL_checklong(L, 2), l);

-  sint32 end = posrelat(luaL_optlong(L, 3, -1), l);

-  if (start < 1) start = 1;

-  if (end > (sint32)l) end = (sint32)l;

-  if (start <= end)

-    lua_pushlstring(L, s+start-1, end-start+1);

-  else lua_pushliteral(L, "");

-  return 1;

-}

-

-

-static int str_lower (lua_State *L) {

-  size_t l;

-  size_t i;

-  luaL_Buffer b;

-  const char *s = luaL_checklstring(L, 1, &l);

-  luaL_buffinit(L, &b);

-  for (i=0; i<l; i++)

-    luaL_putchar(&b, tolower(uchar(s[i])));

-  luaL_pushresult(&b);

-  return 1;

-}

-

-

-static int str_upper (lua_State *L) {

-  size_t l;

-  size_t i;

-  luaL_Buffer b;

-  const char *s = luaL_checklstring(L, 1, &l);

-  luaL_buffinit(L, &b);

-  for (i=0; i<l; i++)

-    luaL_putchar(&b, toupper(uchar(s[i])));

-  luaL_pushresult(&b);

-  return 1;

-}

-

-static int str_rep (lua_State *L) {

-  size_t l;

-  luaL_Buffer b;

-  const char *s = luaL_checklstring(L, 1, &l);

-  int n = luaL_checkint(L, 2);

-  luaL_buffinit(L, &b);

-  while (n-- > 0)

-    luaL_addlstring(&b, s, l);

-  luaL_pushresult(&b);

-  return 1;

-}

-

-

-static int str_byte (lua_State *L) {

-  size_t l;

-  const char *s = luaL_checklstring(L, 1, &l);

-  sint32 pos = posrelat(luaL_optlong(L, 2, 1), l);

-  if (pos <= 0 || (size_t)(pos) > l)  /* index out of range? */

-    return 0;  /* no answer */

-  lua_pushnumber(L, uchar(s[pos-1]));

-  return 1;

-}

-

-

-static int str_char (lua_State *L) {

-  int n = lua_gettop(L);  /* number of arguments */

-  int i;

-  luaL_Buffer b;

-  luaL_buffinit(L, &b);

-  for (i=1; i<=n; i++) {

-    int c = luaL_checkint(L, i);

-    luaL_argcheck(L, uchar(c) == c, i, "invalid value");

-    luaL_putchar(&b, uchar(c));

-  }

-  luaL_pushresult(&b);

-  return 1;

-}

-

-

-static int writer (lua_State *L, const void* b, size_t size, void* B) {

-  (void)L;

-  luaL_addlstring((luaL_Buffer*) B, (const char *)b, size);

-  return 1;

-}

-

-

-static int str_dump (lua_State *L) {

-  luaL_Buffer b;

-  luaL_checktype(L, 1, LUA_TFUNCTION);

-  luaL_buffinit(L,&b);

-  if (!lua_dump(L, writer, &b))

-    luaL_error(L, "unable to dump given function");

-  luaL_pushresult(&b);

-  return 1;

-}

-

-

-

-/*

-** {======================================================

-** PATTERN MATCHING

-** =======================================================

-*/

-

-#ifndef MAX_CAPTURES

-#define MAX_CAPTURES 32  /* arbitrary limit */

-#endif

-

-

-#define CAP_UNFINISHED	(-1)

-#define CAP_POSITION	(-2)

-

-typedef struct MatchState {

-  const char *src_init;  /* init of source string */

-  const char *src_end;  /* end (`\0') of source string */

-  lua_State *L;

-  int level;  /* total number of captures (finished or unfinished) */

-  struct {

-    const char *init;

-    sint32 len;

-  } capture[MAX_CAPTURES];

-} MatchState;

-

-

-#define ESC		'%'

-#define SPECIALS	"^$*+?.([%-"

-

-

-static int check_capture (MatchState *ms, int l) {

-  l -= '1';

-  if (l < 0 || l >= ms->level || ms->capture[l].len == CAP_UNFINISHED)

-    return luaL_error(ms->L, "invalid capture index");

-  return l;

-}

-

-

-static int capture_to_close (MatchState *ms) {

-  int level = ms->level;

-  for (level--; level>=0; level--)

-    if (ms->capture[level].len == CAP_UNFINISHED) return level;

-  return luaL_error(ms->L, "invalid pattern capture");

-}

-

-

-static const char *luaI_classend (MatchState *ms, const char *p) {

-  switch (*p++) {

-    case ESC: {

-      if (*p == '\0')

-        luaL_error(ms->L, "malformed pattern (ends with `%')");

-      return p+1;

-    }

-    case '[': {

-      if (*p == '^') p++;

-      do {  /* look for a `]' */

-        if (*p == '\0')

-          luaL_error(ms->L, "malformed pattern (missing `]')");

-        if (*(p++) == ESC && *p != '\0')

-          p++;  /* skip escapes (e.g. `%]') */

-      } while (*p != ']');

-      return p+1;

-    }

-    default: {

-      return p;

-    }

-  }

-}

-

-

-static int match_class (int c, int cl) {

-  int res;

-  switch (tolower(cl)) {

-    case 'a' : res = isalpha(c); break;

-    case 'c' : res = iscntrl(c); break;

-    case 'd' : res = isdigit(c); break;

-    case 'l' : res = islower(c); break;

-    case 'p' : res = ispunct(c); break;

-    case 's' : res = isspace(c); break;

-    case 'u' : res = isupper(c); break;

-    case 'w' : res = isalnum(c); break;

-    case 'x' : res = isxdigit(c); break;

-    case 'z' : res = (c == 0); break;

-    default: return (cl == c);

-  }

-  return (islower(cl) ? res : !res);

-}

-

-

-static int matchbracketclass (int c, const char *p, const char *ec) {

-  int sig = 1;

-  if (*(p+1) == '^') {

-    sig = 0;

-    p++;  /* skip the `^' */

-  }

-  while (++p < ec) {

-    if (*p == ESC) {

-      p++;

-      if (match_class(c, *p))

-        return sig;

-    }

-    else if ((*(p+1) == '-') && (p+2 < ec)) {

-      p+=2;

-      if (uchar(*(p-2)) <= c && c <= uchar(*p))

-        return sig;

-    }

-    else if (uchar(*p) == c) return sig;

-  }

-  return !sig;

-}

-

-

-static int luaI_singlematch (int c, const char *p, const char *ep) {

-  switch (*p) {

-    case '.': return 1;  /* matches any char */

-    case ESC: return match_class(c, *(p+1));

-    case '[': return matchbracketclass(c, p, ep-1);

-    default:  return (uchar(*p) == c);

-  }

-}

-

-

-static const char *match (MatchState *ms, const char *s, const char *p);

-

-

-static const char *matchbalance (MatchState *ms, const char *s,

-                                   const char *p) {

-  if (*p == 0 || *(p+1) == 0)

-    luaL_error(ms->L, "unbalanced pattern");

-  if (*s != *p) return NULL;

-  else {

-    int b = *p;

-    int e = *(p+1);

-    int cont = 1;

-    while (++s < ms->src_end) {

-      if (*s == e) {

-        if (--cont == 0) return s+1;

-      }

-      else if (*s == b) cont++;

-    }

-  }

-  return NULL;  /* string ends out of balance */

-}

-

-

-static const char *max_expand (MatchState *ms, const char *s,

-                                 const char *p, const char *ep) {

-  sint32 i = 0;  /* counts maximum expand for item */

-  while ((s+i)<ms->src_end && luaI_singlematch(uchar(*(s+i)), p, ep))

-    i++;

-  /* keeps trying to match with the maximum repetitions */

-  while (i>=0) {

-    const char *res = match(ms, (s+i), ep+1);

-    if (res) return res;

-    i--;  /* else didn't match; reduce 1 repetition to try again */

-  }

-  return NULL;

-}

-

-

-static const char *min_expand (MatchState *ms, const char *s,

-                                 const char *p, const char *ep) {

-  for (;;) {

-    const char *res = match(ms, s, ep+1);

-    if (res != NULL)

-      return res;

-    else if (s<ms->src_end && luaI_singlematch(uchar(*s), p, ep))

-      s++;  /* try with one more repetition */

-    else return NULL;

-  }

-}

-

-

-static const char *start_capture (MatchState *ms, const char *s,

-                                    const char *p, int what) {

-  const char *res;

-  int level = ms->level;

-  if (level >= MAX_CAPTURES) luaL_error(ms->L, "too many captures");

-  ms->capture[level].init = s;

-  ms->capture[level].len = what;

-  ms->level = level+1;

-  if ((res=match(ms, s, p)) == NULL)  /* match failed? */

-    ms->level--;  /* undo capture */

-  return res;

-}

-

-

-static const char *end_capture (MatchState *ms, const char *s,

-                                  const char *p) {

-  int l = capture_to_close(ms);

-  const char *res;

-  ms->capture[l].len = s - ms->capture[l].init;  /* close capture */

-  if ((res = match(ms, s, p)) == NULL)  /* match failed? */

-    ms->capture[l].len = CAP_UNFINISHED;  /* undo capture */

-  return res;

-}

-

-

-static const char *match_capture (MatchState *ms, const char *s, int l) {

-  size_t len;

-  l = check_capture(ms, l);

-  len = ms->capture[l].len;

-  if ((size_t)(ms->src_end-s) >= len &&

-      memcmp(ms->capture[l].init, s, len) == 0)

-    return s+len;

-  else return NULL;

-}

-

-

-static const char *match (MatchState *ms, const char *s, const char *p) {

-  init: /* using goto's to optimize tail recursion */

-  switch (*p) {

-    case '(': {  /* start capture */

-      if (*(p+1) == ')')  /* position capture? */

-        return start_capture(ms, s, p+2, CAP_POSITION);

-      else

-        return start_capture(ms, s, p+1, CAP_UNFINISHED);

-    }

-    case ')': {  /* end capture */

-      return end_capture(ms, s, p+1);

-    }

-    case ESC: {

-      switch (*(p+1)) {

-        case 'b': {  /* balanced string? */

-          s = matchbalance(ms, s, p+2);

-          if (s == NULL) return NULL;

-          p+=4; goto init;  /* else return match(ms, s, p+4); */

-        }

-        case 'f': {  /* frontier? */

-          const char *ep; char previous;

-          p += 2;

-          if (*p != '[')

-            luaL_error(ms->L, "missing `[' after `%%f' in pattern");

-          ep = luaI_classend(ms, p);  /* points to what is next */

-          previous = (s == ms->src_init) ? '\0' : *(s-1);

-          if (matchbracketclass(uchar(previous), p, ep-1) ||

-             !matchbracketclass(uchar(*s), p, ep-1)) return NULL;

-          p=ep; goto init;  /* else return match(ms, s, ep); */

-        }

-        default: {

-          if (isdigit(uchar(*(p+1)))) {  /* capture results (%0-%9)? */

-            s = match_capture(ms, s, *(p+1));

-            if (s == NULL) return NULL;

-            p+=2; goto init;  /* else return match(ms, s, p+2) */

-          }

-          goto dflt;  /* case default */

-        }

-      }

-    }

-    case '\0': {  /* end of pattern */

-      return s;  /* match succeeded */

-    }

-    case '$': {

-      if (*(p+1) == '\0')  /* is the `$' the last char in pattern? */

-        return (s == ms->src_end) ? s : NULL;  /* check end of string */

-      else goto dflt;

-    }

-    default: dflt: {  /* it is a pattern item */

-      const char *ep = luaI_classend(ms, p);  /* points to what is next */

-      int m = s<ms->src_end && luaI_singlematch(uchar(*s), p, ep);

-      switch (*ep) {

-        case '?': {  /* optional */

-          const char *res;

-          if (m && ((res=match(ms, s+1, ep+1)) != NULL))

-            return res;

-          p=ep+1; goto init;  /* else return match(ms, s, ep+1); */

-        }

-        case '*': {  /* 0 or more repetitions */

-          return max_expand(ms, s, p, ep);

-        }

-        case '+': {  /* 1 or more repetitions */

-          return (m ? max_expand(ms, s+1, p, ep) : NULL);

-        }

-        case '-': {  /* 0 or more repetitions (minimum) */

-          return min_expand(ms, s, p, ep);

-        }

-        default: {

-          if (!m) return NULL;

-          s++; p=ep; goto init;  /* else return match(ms, s+1, ep); */

-        }

-      }

-    }

-  }

-}

-

-

-

-static const char *lmemfind (const char *s1, size_t l1,

-                               const char *s2, size_t l2) {

-  if (l2 == 0) return s1;  /* empty strings are everywhere */

-  else if (l2 > l1) return NULL;  /* avoids a negative `l1' */

-  else {

-    const char *init;  /* to search for a `*s2' inside `s1' */

-    l2--;  /* 1st char will be checked by `memchr' */

-    l1 = l1-l2;  /* `s2' cannot be found after that */

-    while (l1 > 0 && (init = (const char *)memchr(s1, *s2, l1)) != NULL) {

-      init++;   /* 1st char is already checked */

-      if (memcmp(init, s2+1, l2) == 0)

-        return init-1;

-      else {  /* correct `l1' and `s1' to try again */

-        l1 -= init-s1;

-        s1 = init;

-      }

-    }

-    return NULL;  /* not found */

-  }

-}

-

-

-static void push_onecapture (MatchState *ms, int i) {

-  int l = ms->capture[i].len;

-  if (l == CAP_UNFINISHED) luaL_error(ms->L, "unfinished capture");

-  if (l == CAP_POSITION)

-    lua_pushnumber(ms->L, (lua_Number)(ms->capture[i].init - ms->src_init + 1));

-  else

-    lua_pushlstring(ms->L, ms->capture[i].init, l);

-}

-

-

-static int push_captures (MatchState *ms, const char *s, const char *e) {

-  int i;

-  luaL_checkstack(ms->L, ms->level, "too many captures");

-  if (ms->level == 0 && s) {  /* no explicit captures? */

-    lua_pushlstring(ms->L, s, e-s);  /* return whole match */

-    return 1;

-  }

-  else {  /* return all captures */

-    for (i=0; i<ms->level; i++)

-      push_onecapture(ms, i);

-    return ms->level;  /* number of strings pushed */

-  }

-}

-

-

-static int str_find (lua_State *L) {

-  size_t l1, l2;

-  const char *s = luaL_checklstring(L, 1, &l1);

-  const char *p = luaL_checklstring(L, 2, &l2);

-  sint32 init = posrelat(luaL_optlong(L, 3, 1), l1) - 1;

-  if (init < 0) init = 0;

-  else if ((size_t)(init) > l1) init = (sint32)l1;

-  if (lua_toboolean(L, 4) ||  /* explicit request? */

-      strpbrk(p, SPECIALS) == NULL) {  /* or no special characters? */

-    /* do a plain search */

-    const char *s2 = lmemfind(s+init, l1-init, p, l2);

-    if (s2) {

-      lua_pushnumber(L, (lua_Number)(s2-s+1));

-      lua_pushnumber(L, (lua_Number)(s2-s+l2));

-      return 2;

-    }

-  }

-  else {

-    MatchState ms;

-    int anchor = (*p == '^') ? (p++, 1) : 0;

-    const char *s1=s+init;

-    ms.L = L;

-    ms.src_init = s;

-    ms.src_end = s+l1;

-    do {

-      const char *res;

-      ms.level = 0;

-      if ((res=match(&ms, s1, p)) != NULL) {

-        lua_pushnumber(L, (lua_Number)(s1-s+1));  /* start */

-        lua_pushnumber(L, (lua_Number)(res-s));   /* end */

-        return push_captures(&ms, NULL, 0) + 2;

-      }

-    } while (s1++<ms.src_end && !anchor);

-  }

-  lua_pushnil(L);  /* not found */

-  return 1;

-}

-

-

-static int gfind_aux (lua_State *L) {

-  MatchState ms;

-  const char *s = lua_tostring(L, lua_upvalueindex(1));

-  size_t ls = lua_strlen(L, lua_upvalueindex(1));

-  const char *p = lua_tostring(L, lua_upvalueindex(2));

-  const char *src;

-  ms.L = L;

-  ms.src_init = s;

-  ms.src_end = s+ls;

-  for (src = s + (size_t)lua_tonumber(L, lua_upvalueindex(3));

-       src <= ms.src_end;

-       src++) {

-    const char *e;

-    ms.level = 0;

-    if ((e = match(&ms, src, p)) != NULL) {

-      int newstart = e-s;

-      if (e == src) newstart++;  /* empty match? go at least one position */

-      lua_pushnumber(L, (lua_Number)newstart);

-      lua_replace(L, lua_upvalueindex(3));

-      return push_captures(&ms, src, e);

-    }

-  }

-  return 0;  /* not found */

-}

-

-

-static int gfind (lua_State *L) {

-  luaL_checkstring(L, 1);

-  luaL_checkstring(L, 2);

-  lua_settop(L, 2);

-  lua_pushnumber(L, 0);

-  lua_pushcclosure(L, gfind_aux, 3);

-  return 1;

-}

-

-

-static void add_s (MatchState *ms, luaL_Buffer *b,

-                   const char *s, const char *e) {

-  lua_State *L = ms->L;

-  if (lua_isstring(L, 3)) {

-    const char *news = lua_tostring(L, 3);

-    size_t l = lua_strlen(L, 3);

-    size_t i;

-    for (i=0; i<l; i++) {

-      if (news[i] != ESC)

-        luaL_putchar(b, news[i]);

-      else {

-        i++;  /* skip ESC */

-        if (!isdigit(uchar(news[i])))

-          luaL_putchar(b, news[i]);

-        else {

-          int level = check_capture(ms, news[i]);

-          push_onecapture(ms, level);

-          luaL_addvalue(b);  /* add capture to accumulated result */

-        }

-      }

-    }

-  }

-  else {  /* is a function */

-    int n;

-    lua_pushvalue(L, 3);

-    n = push_captures(ms, s, e);

-    lua_call(L, n, 1);

-    if (lua_isstring(L, -1))

-      luaL_addvalue(b);  /* add return to accumulated result */

-    else

-      lua_pop(L, 1);  /* function result is not a string: pop it */

-  }

-}

-

-

-static int str_gsub (lua_State *L) {

-  size_t srcl;

-  const char *src = luaL_checklstring(L, 1, &srcl);

-  const char *p = luaL_checkstring(L, 2);

-  int max_s = luaL_optint(L, 4, srcl+1);

-  int anchor = (*p == '^') ? (p++, 1) : 0;

-  int n = 0;

-  MatchState ms;

-  luaL_Buffer b;

-  luaL_argcheck(L,

-    lua_gettop(L) >= 3 && (lua_isstring(L, 3) || lua_isfunction(L, 3)),

-    3, "string or function expected");

-  luaL_buffinit(L, &b);

-  ms.L = L;

-  ms.src_init = src;

-  ms.src_end = src+srcl;

-  while (n < max_s) {

-    const char *e;

-    ms.level = 0;

-    e = match(&ms, src, p);

-    if (e) {

-      n++;

-      add_s(&ms, &b, src, e);

-    }

-    if (e && e>src) /* non empty match? */

-      src = e;  /* skip it */

-    else if (src < ms.src_end)

-      luaL_putchar(&b, *src++);

-    else break;

-    if (anchor) break;

-  }

-  luaL_addlstring(&b, src, ms.src_end-src);

-  luaL_pushresult(&b);

-  lua_pushnumber(L, (lua_Number)n);  /* number of substitutions */

-  return 2;

-}

-

-/* }====================================================== */

-

-

-/* maximum size of each formatted item (> len(format('%99.99f', -1e308))) */

-#define MAX_ITEM	512

-/* maximum size of each format specification (such as '%-099.99d') */

-#define MAX_FORMAT	20

-

-

-static void luaI_addquoted (lua_State *L, luaL_Buffer *b, int arg) {

-  size_t l;

-  const char *s = luaL_checklstring(L, arg, &l);

-  luaL_putchar(b, '"');

-  while (l--) {

-    switch (*s) {

-      case '"': case '\\': case '\n': {

-        luaL_putchar(b, '\\');

-        luaL_putchar(b, *s);

-        break;

-      }

-      case '\0': {

-        luaL_addlstring(b, "\\000", 4);

-        break;

-      }

-      default: {

-        luaL_putchar(b, *s);

-        break;

-      }

-    }

-    s++;

-  }

-  luaL_putchar(b, '"');

-}

-

-

-static const char *scanformat (lua_State *L, const char *strfrmt,

-                                 char *form, int *hasprecision) {

-  const char *p = strfrmt;

-  while (strchr("-+ #0", *p)) p++;  /* skip flags */

-  if (isdigit(uchar(*p))) p++;  /* skip width */

-  if (isdigit(uchar(*p))) p++;  /* (2 digits at most) */

-  if (*p == '.') {

-    p++;

-    *hasprecision = 1;

-    if (isdigit(uchar(*p))) p++;  /* skip precision */

-    if (isdigit(uchar(*p))) p++;  /* (2 digits at most) */

-  }

-  if (isdigit(uchar(*p)))

-    luaL_error(L, "invalid format (width or precision too long)");

-  if (p-strfrmt+2 > MAX_FORMAT)  /* +2 to include `%' and the specifier */

-    luaL_error(L, "invalid format (too long)");

-  form[0] = '%';

-  strncpy(form+1, strfrmt, p-strfrmt+1);

-  form[p-strfrmt+2] = 0;

-  return p;

-}

-

-

-static int str_format (lua_State *L) {

-  int arg = 1;

-  size_t sfl;

-  const char *strfrmt = luaL_checklstring(L, arg, &sfl);

-  const char *strfrmt_end = strfrmt+sfl;

-  luaL_Buffer b;

-  luaL_buffinit(L, &b);

-  while (strfrmt < strfrmt_end) {

-    if (*strfrmt != '%')

-      luaL_putchar(&b, *strfrmt++);

-    else if (*++strfrmt == '%')

-      luaL_putchar(&b, *strfrmt++);  /* %% */

-    else { /* format item */

-      char form[MAX_FORMAT];  /* to store the format (`%...') */

-      char buff[MAX_ITEM];  /* to store the formatted item */

-      int hasprecision = 0;

-      if (isdigit(uchar(*strfrmt)) && *(strfrmt+1) == '$')

-        return luaL_error(L, "obsolete option (d$) to `format'");

-      arg++;

-      strfrmt = scanformat(L, strfrmt, form, &hasprecision);

-      switch (*strfrmt++) {

-        case 'c':  case 'd':  case 'i': {

-          sprintf(buff, form, luaL_checkint(L, arg));

-          break;

-        }

-        case 'o':  case 'u':  case 'x':  case 'X': {

-          sprintf(buff, form, (unsigned int)(luaL_checknumber(L, arg)));

-          break;

-        }

-        case 'e':  case 'E': case 'f':

-        case 'g': case 'G': {

-          sprintf(buff, form, luaL_checknumber(L, arg));

-          break;

-        }

-        case 'q': {

-          luaI_addquoted(L, &b, arg);

-          continue;  /* skip the `addsize' at the end */

-        }

-        case 's': {

-          size_t l;

-          const char *s = luaL_checklstring(L, arg, &l);

-          if (!hasprecision && l >= 100) {

-            /* no precision and string is too long to be formatted;

-               keep original string */

-            lua_pushvalue(L, arg);

-            luaL_addvalue(&b);

-            continue;  /* skip the `addsize' at the end */

-          }

-          else {

-            sprintf(buff, form, s);

-            break;

-          }

-        }

-        default: {  /* also treat cases `pnLlh' */

-          return luaL_error(L, "invalid option to `format'");

-        }

-      }

-      luaL_addlstring(&b, buff, strlen(buff));

-    }

-  }

-  luaL_pushresult(&b);

-  return 1;

-}

-

-

-static const luaL_reg strlib[] = {

-  {"len", str_len},

-  {"sub", str_sub},

-  {"lower", str_lower},

-  {"upper", str_upper},

-  {"char", str_char},

-  {"rep", str_rep},

-  {"byte", str_byte},

-  {"format", str_format},

-  {"dump", str_dump},

-  {"find", str_find},

-  {"gfind", gfind},

-  {"gsub", str_gsub},

-  {NULL, NULL}

-};

-

-

-/*

-** Open string library

-*/

-LUALIB_API int luaopen_string (lua_State *L) {

-  luaL_openlib(L, LUA_STRLIBNAME, strlib, 0);

-  return 1;

-}

-

+/*
+** $Id: lstrlib.c,v 1.4 2004-11-27 21:46:10 pixel Exp $
+** Standard library for string operations and pattern-matching
+** See Copyright Notice in lua.h
+*/
+
+
+#include <ctype.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define lstrlib_c
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+/* macro to `unsign' a character */
+#ifndef uchar
+#define uchar(c)        ((unsigned char)(c))
+#endif
+
+
+typedef long sint32;	/* a signed version for size_t */
+
+
+static int str_len (lua_State *L) {
+  size_t l;
+  luaL_checklstring(L, 1, &l);
+  lua_pushnumber(L, (lua_Number)l);
+  return 1;
+}
+
+
+static sint32 posrelat (sint32 pos, size_t len) {
+  /* relative string position: negative means back from end */
+  return (pos>=0) ? pos : (sint32)len+pos+1;
+}
+
+
+static int str_sub (lua_State *L) {
+  size_t l;
+  const char *s = luaL_checklstring(L, 1, &l);
+  sint32 start = posrelat(luaL_checklong(L, 2), l);
+  sint32 end = posrelat(luaL_optlong(L, 3, -1), l);
+  if (start < 1) start = 1;
+  if (end > (sint32)l) end = (sint32)l;
+  if (start <= end)
+    lua_pushlstring(L, s+start-1, end-start+1);
+  else lua_pushliteral(L, "");
+  return 1;
+}
+
+
+static int str_lower (lua_State *L) {
+  size_t l;
+  size_t i;
+  luaL_Buffer b;
+  const char *s = luaL_checklstring(L, 1, &l);
+  luaL_buffinit(L, &b);
+  for (i=0; i<l; i++)
+    luaL_putchar(&b, tolower(uchar(s[i])));
+  luaL_pushresult(&b);
+  return 1;
+}
+
+
+static int str_upper (lua_State *L) {
+  size_t l;
+  size_t i;
+  luaL_Buffer b;
+  const char *s = luaL_checklstring(L, 1, &l);
+  luaL_buffinit(L, &b);
+  for (i=0; i<l; i++)
+    luaL_putchar(&b, toupper(uchar(s[i])));
+  luaL_pushresult(&b);
+  return 1;
+}
+
+static int str_rep (lua_State *L) {
+  size_t l;
+  luaL_Buffer b;
+  const char *s = luaL_checklstring(L, 1, &l);
+  int n = luaL_checkint(L, 2);
+  luaL_buffinit(L, &b);
+  while (n-- > 0)
+    luaL_addlstring(&b, s, l);
+  luaL_pushresult(&b);
+  return 1;
+}
+
+
+static int str_byte (lua_State *L) {
+  size_t l;
+  const char *s = luaL_checklstring(L, 1, &l);
+  sint32 pos = posrelat(luaL_optlong(L, 2, 1), l);
+  if (pos <= 0 || (size_t)(pos) > l)  /* index out of range? */
+    return 0;  /* no answer */
+  lua_pushnumber(L, uchar(s[pos-1]));
+  return 1;
+}
+
+
+static int str_char (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  int i;
+  luaL_Buffer b;
+  luaL_buffinit(L, &b);
+  for (i=1; i<=n; i++) {
+    int c = luaL_checkint(L, i);
+    luaL_argcheck(L, uchar(c) == c, i, "invalid value");
+    luaL_putchar(&b, uchar(c));
+  }
+  luaL_pushresult(&b);
+  return 1;
+}
+
+
+static int writer (lua_State *L, const void* b, size_t size, void* B) {
+  (void)L;
+  luaL_addlstring((luaL_Buffer*) B, (const char *)b, size);
+  return 1;
+}
+
+
+static int str_dump (lua_State *L) {
+  luaL_Buffer b;
+  luaL_checktype(L, 1, LUA_TFUNCTION);
+  luaL_buffinit(L,&b);
+  if (!lua_dump(L, writer, &b))
+    luaL_error(L, "unable to dump given function");
+  luaL_pushresult(&b);
+  return 1;
+}
+
+
+
+/*
+** {======================================================
+** PATTERN MATCHING
+** =======================================================
+*/
+
+#ifndef MAX_CAPTURES
+#define MAX_CAPTURES 32  /* arbitrary limit */
+#endif
+
+
+#define CAP_UNFINISHED	(-1)
+#define CAP_POSITION	(-2)
+
+typedef struct MatchState {
+  const char *src_init;  /* init of source string */
+  const char *src_end;  /* end (`\0') of source string */
+  lua_State *L;
+  int level;  /* total number of captures (finished or unfinished) */
+  struct {
+    const char *init;
+    sint32 len;
+  } capture[MAX_CAPTURES];
+} MatchState;
+
+
+#define ESC		'%'
+#define SPECIALS	"^$*+?.([%-"
+
+
+static int check_capture (MatchState *ms, int l) {
+  l -= '1';
+  if (l < 0 || l >= ms->level || ms->capture[l].len == CAP_UNFINISHED)
+    return luaL_error(ms->L, "invalid capture index");
+  return l;
+}
+
+
+static int capture_to_close (MatchState *ms) {
+  int level = ms->level;
+  for (level--; level>=0; level--)
+    if (ms->capture[level].len == CAP_UNFINISHED) return level;
+  return luaL_error(ms->L, "invalid pattern capture");
+}
+
+
+static const char *luaI_classend (MatchState *ms, const char *p) {
+  switch (*p++) {
+    case ESC: {
+      if (*p == '\0')
+        luaL_error(ms->L, "malformed pattern (ends with `%')");
+      return p+1;
+    }
+    case '[': {
+      if (*p == '^') p++;
+      do {  /* look for a `]' */
+        if (*p == '\0')
+          luaL_error(ms->L, "malformed pattern (missing `]')");
+        if (*(p++) == ESC && *p != '\0')
+          p++;  /* skip escapes (e.g. `%]') */
+      } while (*p != ']');
+      return p+1;
+    }
+    default: {
+      return p;
+    }
+  }
+}
+
+
+static int match_class (int c, int cl) {
+  int res;
+  switch (tolower(cl)) {
+    case 'a' : res = isalpha(c); break;
+    case 'c' : res = iscntrl(c); break;
+    case 'd' : res = isdigit(c); break;
+    case 'l' : res = islower(c); break;
+    case 'p' : res = ispunct(c); break;
+    case 's' : res = isspace(c); break;
+    case 'u' : res = isupper(c); break;
+    case 'w' : res = isalnum(c); break;
+    case 'x' : res = isxdigit(c); break;
+    case 'z' : res = (c == 0); break;
+    default: return (cl == c);
+  }
+  return (islower(cl) ? res : !res);
+}
+
+
+static int matchbracketclass (int c, const char *p, const char *ec) {
+  int sig = 1;
+  if (*(p+1) == '^') {
+    sig = 0;
+    p++;  /* skip the `^' */
+  }
+  while (++p < ec) {
+    if (*p == ESC) {
+      p++;
+      if (match_class(c, *p))
+        return sig;
+    }
+    else if ((*(p+1) == '-') && (p+2 < ec)) {
+      p+=2;
+      if (uchar(*(p-2)) <= c && c <= uchar(*p))
+        return sig;
+    }
+    else if (uchar(*p) == c) return sig;
+  }
+  return !sig;
+}
+
+
+static int luaI_singlematch (int c, const char *p, const char *ep) {
+  switch (*p) {
+    case '.': return 1;  /* matches any char */
+    case ESC: return match_class(c, *(p+1));
+    case '[': return matchbracketclass(c, p, ep-1);
+    default:  return (uchar(*p) == c);
+  }
+}
+
+
+static const char *match (MatchState *ms, const char *s, const char *p);
+
+
+static const char *matchbalance (MatchState *ms, const char *s,
+                                   const char *p) {
+  if (*p == 0 || *(p+1) == 0)
+    luaL_error(ms->L, "unbalanced pattern");
+  if (*s != *p) return NULL;
+  else {
+    int b = *p;
+    int e = *(p+1);
+    int cont = 1;
+    while (++s < ms->src_end) {
+      if (*s == e) {
+        if (--cont == 0) return s+1;
+      }
+      else if (*s == b) cont++;
+    }
+  }
+  return NULL;  /* string ends out of balance */
+}
+
+
+static const char *max_expand (MatchState *ms, const char *s,
+                                 const char *p, const char *ep) {
+  sint32 i = 0;  /* counts maximum expand for item */
+  while ((s+i)<ms->src_end && luaI_singlematch(uchar(*(s+i)), p, ep))
+    i++;
+  /* keeps trying to match with the maximum repetitions */
+  while (i>=0) {
+    const char *res = match(ms, (s+i), ep+1);
+    if (res) return res;
+    i--;  /* else didn't match; reduce 1 repetition to try again */
+  }
+  return NULL;
+}
+
+
+static const char *min_expand (MatchState *ms, const char *s,
+                                 const char *p, const char *ep) {
+  for (;;) {
+    const char *res = match(ms, s, ep+1);
+    if (res != NULL)
+      return res;
+    else if (s<ms->src_end && luaI_singlematch(uchar(*s), p, ep))
+      s++;  /* try with one more repetition */
+    else return NULL;
+  }
+}
+
+
+static const char *start_capture (MatchState *ms, const char *s,
+                                    const char *p, int what) {
+  const char *res;
+  int level = ms->level;
+  if (level >= MAX_CAPTURES) luaL_error(ms->L, "too many captures");
+  ms->capture[level].init = s;
+  ms->capture[level].len = what;
+  ms->level = level+1;
+  if ((res=match(ms, s, p)) == NULL)  /* match failed? */
+    ms->level--;  /* undo capture */
+  return res;
+}
+
+
+static const char *end_capture (MatchState *ms, const char *s,
+                                  const char *p) {
+  int l = capture_to_close(ms);
+  const char *res;
+  ms->capture[l].len = s - ms->capture[l].init;  /* close capture */
+  if ((res = match(ms, s, p)) == NULL)  /* match failed? */
+    ms->capture[l].len = CAP_UNFINISHED;  /* undo capture */
+  return res;
+}
+
+
+static const char *match_capture (MatchState *ms, const char *s, int l) {
+  size_t len;
+  l = check_capture(ms, l);
+  len = ms->capture[l].len;
+  if ((size_t)(ms->src_end-s) >= len &&
+      memcmp(ms->capture[l].init, s, len) == 0)
+    return s+len;
+  else return NULL;
+}
+
+
+static const char *match (MatchState *ms, const char *s, const char *p) {
+  init: /* using goto's to optimize tail recursion */
+  switch (*p) {
+    case '(': {  /* start capture */
+      if (*(p+1) == ')')  /* position capture? */
+        return start_capture(ms, s, p+2, CAP_POSITION);
+      else
+        return start_capture(ms, s, p+1, CAP_UNFINISHED);
+    }
+    case ')': {  /* end capture */
+      return end_capture(ms, s, p+1);
+    }
+    case ESC: {
+      switch (*(p+1)) {
+        case 'b': {  /* balanced string? */
+          s = matchbalance(ms, s, p+2);
+          if (s == NULL) return NULL;
+          p+=4; goto init;  /* else return match(ms, s, p+4); */
+        }
+        case 'f': {  /* frontier? */
+          const char *ep; char previous;
+          p += 2;
+          if (*p != '[')
+            luaL_error(ms->L, "missing `[' after `%%f' in pattern");
+          ep = luaI_classend(ms, p);  /* points to what is next */
+          previous = (s == ms->src_init) ? '\0' : *(s-1);
+          if (matchbracketclass(uchar(previous), p, ep-1) ||
+             !matchbracketclass(uchar(*s), p, ep-1)) return NULL;
+          p=ep; goto init;  /* else return match(ms, s, ep); */
+        }
+        default: {
+          if (isdigit(uchar(*(p+1)))) {  /* capture results (%0-%9)? */
+            s = match_capture(ms, s, *(p+1));
+            if (s == NULL) return NULL;
+            p+=2; goto init;  /* else return match(ms, s, p+2) */
+          }
+          goto dflt;  /* case default */
+        }
+      }
+    }
+    case '\0': {  /* end of pattern */
+      return s;  /* match succeeded */
+    }
+    case '$': {
+      if (*(p+1) == '\0')  /* is the `$' the last char in pattern? */
+        return (s == ms->src_end) ? s : NULL;  /* check end of string */
+      else goto dflt;
+    }
+    default: dflt: {  /* it is a pattern item */
+      const char *ep = luaI_classend(ms, p);  /* points to what is next */
+      int m = s<ms->src_end && luaI_singlematch(uchar(*s), p, ep);
+      switch (*ep) {
+        case '?': {  /* optional */
+          const char *res;
+          if (m && ((res=match(ms, s+1, ep+1)) != NULL))
+            return res;
+          p=ep+1; goto init;  /* else return match(ms, s, ep+1); */
+        }
+        case '*': {  /* 0 or more repetitions */
+          return max_expand(ms, s, p, ep);
+        }
+        case '+': {  /* 1 or more repetitions */
+          return (m ? max_expand(ms, s+1, p, ep) : NULL);
+        }
+        case '-': {  /* 0 or more repetitions (minimum) */
+          return min_expand(ms, s, p, ep);
+        }
+        default: {
+          if (!m) return NULL;
+          s++; p=ep; goto init;  /* else return match(ms, s+1, ep); */
+        }
+      }
+    }
+  }
+}
+
+
+
+static const char *lmemfind (const char *s1, size_t l1,
+                               const char *s2, size_t l2) {
+  if (l2 == 0) return s1;  /* empty strings are everywhere */
+  else if (l2 > l1) return NULL;  /* avoids a negative `l1' */
+  else {
+    const char *init;  /* to search for a `*s2' inside `s1' */
+    l2--;  /* 1st char will be checked by `memchr' */
+    l1 = l1-l2;  /* `s2' cannot be found after that */
+    while (l1 > 0 && (init = (const char *)memchr(s1, *s2, l1)) != NULL) {
+      init++;   /* 1st char is already checked */
+      if (memcmp(init, s2+1, l2) == 0)
+        return init-1;
+      else {  /* correct `l1' and `s1' to try again */
+        l1 -= init-s1;
+        s1 = init;
+      }
+    }
+    return NULL;  /* not found */
+  }
+}
+
+
+static void push_onecapture (MatchState *ms, int i) {
+  int l = ms->capture[i].len;
+  if (l == CAP_UNFINISHED) luaL_error(ms->L, "unfinished capture");
+  if (l == CAP_POSITION)
+    lua_pushnumber(ms->L, (lua_Number)(ms->capture[i].init - ms->src_init + 1));
+  else
+    lua_pushlstring(ms->L, ms->capture[i].init, l);
+}
+
+
+static int push_captures (MatchState *ms, const char *s, const char *e) {
+  int i;
+  luaL_checkstack(ms->L, ms->level, "too many captures");
+  if (ms->level == 0 && s) {  /* no explicit captures? */
+    lua_pushlstring(ms->L, s, e-s);  /* return whole match */
+    return 1;
+  }
+  else {  /* return all captures */
+    for (i=0; i<ms->level; i++)
+      push_onecapture(ms, i);
+    return ms->level;  /* number of strings pushed */
+  }
+}
+
+
+static int str_find (lua_State *L) {
+  size_t l1, l2;
+  const char *s = luaL_checklstring(L, 1, &l1);
+  const char *p = luaL_checklstring(L, 2, &l2);
+  sint32 init = posrelat(luaL_optlong(L, 3, 1), l1) - 1;
+  if (init < 0) init = 0;
+  else if ((size_t)(init) > l1) init = (sint32)l1;
+  if (lua_toboolean(L, 4) ||  /* explicit request? */
+      strpbrk(p, SPECIALS) == NULL) {  /* or no special characters? */
+    /* do a plain search */
+    const char *s2 = lmemfind(s+init, l1-init, p, l2);
+    if (s2) {
+      lua_pushnumber(L, (lua_Number)(s2-s+1));
+      lua_pushnumber(L, (lua_Number)(s2-s+l2));
+      return 2;
+    }
+  }
+  else {
+    MatchState ms;
+    int anchor = (*p == '^') ? (p++, 1) : 0;
+    const char *s1=s+init;
+    ms.L = L;
+    ms.src_init = s;
+    ms.src_end = s+l1;
+    do {
+      const char *res;
+      ms.level = 0;
+      if ((res=match(&ms, s1, p)) != NULL) {
+        lua_pushnumber(L, (lua_Number)(s1-s+1));  /* start */
+        lua_pushnumber(L, (lua_Number)(res-s));   /* end */
+        return push_captures(&ms, NULL, 0) + 2;
+      }
+    } while (s1++<ms.src_end && !anchor);
+  }
+  lua_pushnil(L);  /* not found */
+  return 1;
+}
+
+
+static int gfind_aux (lua_State *L) {
+  MatchState ms;
+  const char *s = lua_tostring(L, lua_upvalueindex(1));
+  size_t ls = lua_strlen(L, lua_upvalueindex(1));
+  const char *p = lua_tostring(L, lua_upvalueindex(2));
+  const char *src;
+  ms.L = L;
+  ms.src_init = s;
+  ms.src_end = s+ls;
+  for (src = s + (size_t)lua_tonumber(L, lua_upvalueindex(3));
+       src <= ms.src_end;
+       src++) {
+    const char *e;
+    ms.level = 0;
+    if ((e = match(&ms, src, p)) != NULL) {
+      int newstart = e-s;
+      if (e == src) newstart++;  /* empty match? go at least one position */
+      lua_pushnumber(L, (lua_Number)newstart);
+      lua_replace(L, lua_upvalueindex(3));
+      return push_captures(&ms, src, e);
+    }
+  }
+  return 0;  /* not found */
+}
+
+
+static int gfind (lua_State *L) {
+  luaL_checkstring(L, 1);
+  luaL_checkstring(L, 2);
+  lua_settop(L, 2);
+  lua_pushnumber(L, 0);
+  lua_pushcclosure(L, gfind_aux, 3);
+  return 1;
+}
+
+
+static void add_s (MatchState *ms, luaL_Buffer *b,
+                   const char *s, const char *e) {
+  lua_State *L = ms->L;
+  if (lua_isstring(L, 3)) {
+    const char *news = lua_tostring(L, 3);
+    size_t l = lua_strlen(L, 3);
+    size_t i;
+    for (i=0; i<l; i++) {
+      if (news[i] != ESC)
+        luaL_putchar(b, news[i]);
+      else {
+        i++;  /* skip ESC */
+        if (!isdigit(uchar(news[i])))
+          luaL_putchar(b, news[i]);
+        else {
+          int level = check_capture(ms, news[i]);
+          push_onecapture(ms, level);
+          luaL_addvalue(b);  /* add capture to accumulated result */
+        }
+      }
+    }
+  }
+  else {  /* is a function */
+    int n;
+    lua_pushvalue(L, 3);
+    n = push_captures(ms, s, e);
+    lua_call(L, n, 1);
+    if (lua_isstring(L, -1))
+      luaL_addvalue(b);  /* add return to accumulated result */
+    else
+      lua_pop(L, 1);  /* function result is not a string: pop it */
+  }
+}
+
+
+static int str_gsub (lua_State *L) {
+  size_t srcl;
+  const char *src = luaL_checklstring(L, 1, &srcl);
+  const char *p = luaL_checkstring(L, 2);
+  int max_s = luaL_optint(L, 4, srcl+1);
+  int anchor = (*p == '^') ? (p++, 1) : 0;
+  int n = 0;
+  MatchState ms;
+  luaL_Buffer b;
+  luaL_argcheck(L,
+    lua_gettop(L) >= 3 && (lua_isstring(L, 3) || lua_isfunction(L, 3)),
+    3, "string or function expected");
+  luaL_buffinit(L, &b);
+  ms.L = L;
+  ms.src_init = src;
+  ms.src_end = src+srcl;
+  while (n < max_s) {
+    const char *e;
+    ms.level = 0;
+    e = match(&ms, src, p);
+    if (e) {
+      n++;
+      add_s(&ms, &b, src, e);
+    }
+    if (e && e>src) /* non empty match? */
+      src = e;  /* skip it */
+    else if (src < ms.src_end)
+      luaL_putchar(&b, *src++);
+    else break;
+    if (anchor) break;
+  }
+  luaL_addlstring(&b, src, ms.src_end-src);
+  luaL_pushresult(&b);
+  lua_pushnumber(L, (lua_Number)n);  /* number of substitutions */
+  return 2;
+}
+
+/* }====================================================== */
+
+
+/* maximum size of each formatted item (> len(format('%99.99f', -1e308))) */
+#define MAX_ITEM	512
+/* maximum size of each format specification (such as '%-099.99d') */
+#define MAX_FORMAT	20
+
+
+static void luaI_addquoted (lua_State *L, luaL_Buffer *b, int arg) {
+  size_t l;
+  const char *s = luaL_checklstring(L, arg, &l);
+  luaL_putchar(b, '"');
+  while (l--) {
+    switch (*s) {
+      case '"': case '\\': case '\n': {
+        luaL_putchar(b, '\\');
+        luaL_putchar(b, *s);
+        break;
+      }
+      case '\0': {
+        luaL_addlstring(b, "\\000", 4);
+        break;
+      }
+      default: {
+        luaL_putchar(b, *s);
+        break;
+      }
+    }
+    s++;
+  }
+  luaL_putchar(b, '"');
+}
+
+
+static const char *scanformat (lua_State *L, const char *strfrmt,
+                                 char *form, int *hasprecision) {
+  const char *p = strfrmt;
+  while (strchr("-+ #0", *p)) p++;  /* skip flags */
+  if (isdigit(uchar(*p))) p++;  /* skip width */
+  if (isdigit(uchar(*p))) p++;  /* (2 digits at most) */
+  if (*p == '.') {
+    p++;
+    *hasprecision = 1;
+    if (isdigit(uchar(*p))) p++;  /* skip precision */
+    if (isdigit(uchar(*p))) p++;  /* (2 digits at most) */
+  }
+  if (isdigit(uchar(*p)))
+    luaL_error(L, "invalid format (width or precision too long)");
+  if (p-strfrmt+2 > MAX_FORMAT)  /* +2 to include `%' and the specifier */
+    luaL_error(L, "invalid format (too long)");
+  form[0] = '%';
+  strncpy(form+1, strfrmt, p-strfrmt+1);
+  form[p-strfrmt+2] = 0;
+  return p;
+}
+
+
+static int str_format (lua_State *L) {
+  int arg = 1;
+  size_t sfl;
+  const char *strfrmt = luaL_checklstring(L, arg, &sfl);
+  const char *strfrmt_end = strfrmt+sfl;
+  luaL_Buffer b;
+  luaL_buffinit(L, &b);
+  while (strfrmt < strfrmt_end) {
+    if (*strfrmt != '%')
+      luaL_putchar(&b, *strfrmt++);
+    else if (*++strfrmt == '%')
+      luaL_putchar(&b, *strfrmt++);  /* %% */
+    else { /* format item */
+      char form[MAX_FORMAT];  /* to store the format (`%...') */
+      char buff[MAX_ITEM];  /* to store the formatted item */
+      int hasprecision = 0;
+      if (isdigit(uchar(*strfrmt)) && *(strfrmt+1) == '$')
+        return luaL_error(L, "obsolete option (d$) to `format'");
+      arg++;
+      strfrmt = scanformat(L, strfrmt, form, &hasprecision);
+      switch (*strfrmt++) {
+        case 'c':  case 'd':  case 'i': {
+          sprintf(buff, form, luaL_checkint(L, arg));
+          break;
+        }
+        case 'o':  case 'u':  case 'x':  case 'X': {
+          sprintf(buff, form, (unsigned int)(luaL_checknumber(L, arg)));
+          break;
+        }
+        case 'e':  case 'E': case 'f':
+        case 'g': case 'G': {
+          sprintf(buff, form, luaL_checknumber(L, arg));
+          break;
+        }
+        case 'q': {
+          luaI_addquoted(L, &b, arg);
+          continue;  /* skip the `addsize' at the end */
+        }
+        case 's': {
+          size_t l;
+          const char *s = luaL_checklstring(L, arg, &l);
+          if (!hasprecision && l >= 100) {
+            /* no precision and string is too long to be formatted;
+               keep original string */
+            lua_pushvalue(L, arg);
+            luaL_addvalue(&b);
+            continue;  /* skip the `addsize' at the end */
+          }
+          else {
+            sprintf(buff, form, s);
+            break;
+          }
+        }
+        default: {  /* also treat cases `pnLlh' */
+          return luaL_error(L, "invalid option to `format'");
+        }
+      }
+      luaL_addlstring(&b, buff, strlen(buff));
+    }
+  }
+  luaL_pushresult(&b);
+  return 1;
+}
+
+
+static const luaL_reg strlib[] = {
+  {"len", str_len},
+  {"sub", str_sub},
+  {"lower", str_lower},
+  {"upper", str_upper},
+  {"char", str_char},
+  {"rep", str_rep},
+  {"byte", str_byte},
+  {"format", str_format},
+  {"dump", str_dump},
+  {"find", str_find},
+  {"gfind", gfind},
+  {"gsub", str_gsub},
+  {NULL, NULL}
+};
+
+
+/*
+** Open string library
+*/
+LUALIB_API int luaopen_string (lua_State *L) {
+  luaL_openlib(L, LUA_STRLIBNAME, strlib, 0);
+  return 1;
+}
+
diff --git a/lib/lua/src/LuaLib/ltablib.c b/lib/lua/src/LuaLib/ltablib.c
index fc6c380..71f3afa 100644
--- a/lib/lua/src/LuaLib/ltablib.c
+++ b/lib/lua/src/LuaLib/ltablib.c
@@ -1,250 +1,250 @@
-/*

-** $Id: ltablib.c,v 1.3 2004-11-27 21:35:21 pixel Exp $

-** Library for Table Manipulation

-** See Copyright Notice in lua.h

-*/

-

-

-#include <stddef.h>

-

-#define ltablib_c

-

-#include "lua.h"

-

-#include "lauxlib.h"

-#include "lualib.h"

-

-

-#define aux_getn(L,n)	(luaL_checktype(L, n, LUA_TTABLE), luaL_getn(L, n))

-

-

-static int luaB_foreachi (lua_State *L) {

-  int i;

-  int n = aux_getn(L, 1);

-  luaL_checktype(L, 2, LUA_TFUNCTION);

-  for (i=1; i<=n; i++) {

-    lua_pushvalue(L, 2);  /* function */

-    lua_pushnumber(L, (lua_Number)i);  /* 1st argument */

-    lua_rawgeti(L, 1, i);  /* 2nd argument */

-    lua_call(L, 2, 1);

-    if (!lua_isnil(L, -1))

-      return 1;

-    lua_pop(L, 1);  /* remove nil result */

-  }

-  return 0;

-}

-

-

-static int luaB_foreach (lua_State *L) {

-  luaL_checktype(L, 1, LUA_TTABLE);

-  luaL_checktype(L, 2, LUA_TFUNCTION);

-  lua_pushnil(L);  /* first key */

-  for (;;) {

-    if (lua_next(L, 1) == 0)

-      return 0;

-    lua_pushvalue(L, 2);  /* function */

-    lua_pushvalue(L, -3);  /* key */

-    lua_pushvalue(L, -3);  /* value */

-    lua_call(L, 2, 1);

-    if (!lua_isnil(L, -1))

-      return 1;

-    lua_pop(L, 2);  /* remove value and result */

-  }

-}

-

-

-static int luaB_getn (lua_State *L) {

-  lua_pushnumber(L, (lua_Number)aux_getn(L, 1));

-  return 1;

-}

-

-

-static int luaB_setn (lua_State *L) {

-  luaL_checktype(L, 1, LUA_TTABLE);

-  luaL_setn(L, 1, luaL_checkint(L, 2));

-  return 0;

-}

-

-

-static int luaB_tinsert (lua_State *L) {

-  int v = lua_gettop(L);  /* number of arguments */

-  int n = aux_getn(L, 1) + 1;

-  int pos;  /* where to insert new element */

-  if (v == 2)  /* called with only 2 arguments */

-    pos = n;  /* insert new element at the end */

-  else {

-    pos = luaL_checkint(L, 2);  /* 2nd argument is the position */

-    if (pos > n) n = pos;  /* `grow' array if necessary */

-    v = 3;  /* function may be called with more than 3 args */

-  }

-  luaL_setn(L, 1, n);  /* new size */

-  while (--n >= pos) {  /* move up elements */

-    lua_rawgeti(L, 1, n);

-    lua_rawseti(L, 1, n+1);  /* t[n+1] = t[n] */

-  }

-  lua_pushvalue(L, v);

-  lua_rawseti(L, 1, pos);  /* t[pos] = v */

-  return 0;

-}

-

-

-static int luaB_tremove (lua_State *L) {

-  int n = aux_getn(L, 1);

-  int pos = luaL_optint(L, 2, n);

-  if (n <= 0) return 0;  /* table is `empty' */

-  luaL_setn(L, 1, n-1);  /* t.n = n-1 */

-  lua_rawgeti(L, 1, pos);  /* result = t[pos] */

-  for ( ;pos<n; pos++) {

-    lua_rawgeti(L, 1, pos+1);

-    lua_rawseti(L, 1, pos);  /* t[pos] = t[pos+1] */

-  }

-  lua_pushnil(L);

-  lua_rawseti(L, 1, n);  /* t[n] = nil */

-  return 1;

-}

-

-

-static int str_concat (lua_State *L) {

-  luaL_Buffer b;

-  size_t lsep;

-  const char *sep = luaL_optlstring(L, 2, "", &lsep);

-  int i = luaL_optint(L, 3, 1);

-  int n = luaL_optint(L, 4, 0);

-  luaL_checktype(L, 1, LUA_TTABLE);

-  if (n == 0) n = luaL_getn(L, 1);

-  luaL_buffinit(L, &b);

-  for (; i <= n; i++) {

-    lua_rawgeti(L, 1, i);

-    luaL_argcheck(L, lua_isstring(L, -1), 1, "table contains non-strings");

-    luaL_addvalue(&b);

-    if (i != n)

-      luaL_addlstring(&b, sep, lsep);

-  }

-  luaL_pushresult(&b);

-  return 1;

-}

-

-

-

-/*

-** {======================================================

-** Quicksort

-** (based on `Algorithms in MODULA-3', Robert Sedgewick;

-**  Addison-Wesley, 1993.)

-*/

-

-

-static void set2 (lua_State *L, int i, int j) {

-  lua_rawseti(L, 1, i);

-  lua_rawseti(L, 1, j);

-}

-

-static int sort_comp (lua_State *L, int a, int b) {

-  if (!lua_isnil(L, 2)) {  /* function? */

-    int res;

-    lua_pushvalue(L, 2);

-    lua_pushvalue(L, a-1);  /* -1 to compensate function */

-    lua_pushvalue(L, b-2);  /* -2 to compensate function and `a' */

-    lua_call(L, 2, 1);

-    res = lua_toboolean(L, -1);

-    lua_pop(L, 1);

-    return res;

-  }

-  else  /* a < b? */

-    return lua_lessthan(L, a, b);

-}

-

-static void auxsort (lua_State *L, int l, int u) {

-  while (l < u) {  /* for tail recursion */

-    int i, j;

-    /* sort elements a[l], a[(l+u)/2] and a[u] */

-    lua_rawgeti(L, 1, l);

-    lua_rawgeti(L, 1, u);

-    if (sort_comp(L, -1, -2))  /* a[u] < a[l]? */

-      set2(L, l, u);  /* swap a[l] - a[u] */

-    else

-      lua_pop(L, 2);

-    if (u-l == 1) break;  /* only 2 elements */

-    i = (l+u)/2;

-    lua_rawgeti(L, 1, i);

-    lua_rawgeti(L, 1, l);

-    if (sort_comp(L, -2, -1))  /* a[i]<a[l]? */

-      set2(L, i, l);

-    else {

-      lua_pop(L, 1);  /* remove a[l] */

-      lua_rawgeti(L, 1, u);

-      if (sort_comp(L, -1, -2))  /* a[u]<a[i]? */

-        set2(L, i, u);

-      else

-        lua_pop(L, 2);

-    }

-    if (u-l == 2) break;  /* only 3 elements */

-    lua_rawgeti(L, 1, i);  /* Pivot */

-    lua_pushvalue(L, -1);

-    lua_rawgeti(L, 1, u-1);

-    set2(L, i, u-1);

-    /* a[l] <= P == a[u-1] <= a[u], only need to sort from l+1 to u-2 */

-    i = l; j = u-1;

-    for (;;) {  /* invariant: a[l..i] <= P <= a[j..u] */

-      /* repeat ++i until a[i] >= P */

-      while (lua_rawgeti(L, 1, ++i), sort_comp(L, -1, -2)) {

-        if (i>u) luaL_error(L, "invalid order function for sorting");

-        lua_pop(L, 1);  /* remove a[i] */

-      }

-      /* repeat --j until a[j] <= P */

-      while (lua_rawgeti(L, 1, --j), sort_comp(L, -3, -1)) {

-        if (j<l) luaL_error(L, "invalid order function for sorting");

-        lua_pop(L, 1);  /* remove a[j] */

-      }

-      if (j<i) {

-        lua_pop(L, 3);  /* pop pivot, a[i], a[j] */

-        break;

-      }

-      set2(L, i, j);

-    }

-    lua_rawgeti(L, 1, u-1);

-    lua_rawgeti(L, 1, i);

-    set2(L, u-1, i);  /* swap pivot (a[u-1]) with a[i] */

-    /* a[l..i-1] <= a[i] == P <= a[i+1..u] */

-    /* adjust so that smaller half is in [j..i] and larger one in [l..u] */

-    if (i-l < u-i) {

-      j=l; i=i-1; l=i+2;

-    }

-    else {

-      j=i+1; i=u; u=j-2;

-    }

-    auxsort(L, j, i);  /* call recursively the smaller one */

-  }  /* repeat the routine for the larger one */

-}

-

-static int luaB_sort (lua_State *L) {

-  int n = aux_getn(L, 1);

-  luaL_checkstack(L, 40, "");  /* assume array is smaller than 2^40 */

-  if (!lua_isnoneornil(L, 2))  /* is there a 2nd argument? */

-    luaL_checktype(L, 2, LUA_TFUNCTION);

-  lua_settop(L, 2);  /* make sure there is two arguments */

-  auxsort(L, 1, n);

-  return 0;

-}

-

-/* }====================================================== */

-

-

-static const luaL_reg tab_funcs[] = {

-  {"concat", str_concat},

-  {"foreach", luaB_foreach},

-  {"foreachi", luaB_foreachi},

-  {"getn", luaB_getn},

-  {"setn", luaB_setn},

-  {"sort", luaB_sort},

-  {"insert", luaB_tinsert},

-  {"remove", luaB_tremove},

-  {NULL, NULL}

-};

-

-

-LUALIB_API int luaopen_table (lua_State *L) {

-  luaL_openlib(L, LUA_TABLIBNAME, tab_funcs, 0);

-  return 1;

-}

-

+/*
+** $Id: ltablib.c,v 1.4 2004-11-27 21:46:10 pixel Exp $
+** Library for Table Manipulation
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stddef.h>
+
+#define ltablib_c
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+#define aux_getn(L,n)	(luaL_checktype(L, n, LUA_TTABLE), luaL_getn(L, n))
+
+
+static int luaB_foreachi (lua_State *L) {
+  int i;
+  int n = aux_getn(L, 1);
+  luaL_checktype(L, 2, LUA_TFUNCTION);
+  for (i=1; i<=n; i++) {
+    lua_pushvalue(L, 2);  /* function */
+    lua_pushnumber(L, (lua_Number)i);  /* 1st argument */
+    lua_rawgeti(L, 1, i);  /* 2nd argument */
+    lua_call(L, 2, 1);
+    if (!lua_isnil(L, -1))
+      return 1;
+    lua_pop(L, 1);  /* remove nil result */
+  }
+  return 0;
+}
+
+
+static int luaB_foreach (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  luaL_checktype(L, 2, LUA_TFUNCTION);
+  lua_pushnil(L);  /* first key */
+  for (;;) {
+    if (lua_next(L, 1) == 0)
+      return 0;
+    lua_pushvalue(L, 2);  /* function */
+    lua_pushvalue(L, -3);  /* key */
+    lua_pushvalue(L, -3);  /* value */
+    lua_call(L, 2, 1);
+    if (!lua_isnil(L, -1))
+      return 1;
+    lua_pop(L, 2);  /* remove value and result */
+  }
+}
+
+
+static int luaB_getn (lua_State *L) {
+  lua_pushnumber(L, (lua_Number)aux_getn(L, 1));
+  return 1;
+}
+
+
+static int luaB_setn (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  luaL_setn(L, 1, luaL_checkint(L, 2));
+  return 0;
+}
+
+
+static int luaB_tinsert (lua_State *L) {
+  int v = lua_gettop(L);  /* number of arguments */
+  int n = aux_getn(L, 1) + 1;
+  int pos;  /* where to insert new element */
+  if (v == 2)  /* called with only 2 arguments */
+    pos = n;  /* insert new element at the end */
+  else {
+    pos = luaL_checkint(L, 2);  /* 2nd argument is the position */
+    if (pos > n) n = pos;  /* `grow' array if necessary */
+    v = 3;  /* function may be called with more than 3 args */
+  }
+  luaL_setn(L, 1, n);  /* new size */
+  while (--n >= pos) {  /* move up elements */
+    lua_rawgeti(L, 1, n);
+    lua_rawseti(L, 1, n+1);  /* t[n+1] = t[n] */
+  }
+  lua_pushvalue(L, v);
+  lua_rawseti(L, 1, pos);  /* t[pos] = v */
+  return 0;
+}
+
+
+static int luaB_tremove (lua_State *L) {
+  int n = aux_getn(L, 1);
+  int pos = luaL_optint(L, 2, n);
+  if (n <= 0) return 0;  /* table is `empty' */
+  luaL_setn(L, 1, n-1);  /* t.n = n-1 */
+  lua_rawgeti(L, 1, pos);  /* result = t[pos] */
+  for ( ;pos<n; pos++) {
+    lua_rawgeti(L, 1, pos+1);
+    lua_rawseti(L, 1, pos);  /* t[pos] = t[pos+1] */
+  }
+  lua_pushnil(L);
+  lua_rawseti(L, 1, n);  /* t[n] = nil */
+  return 1;
+}
+
+
+static int str_concat (lua_State *L) {
+  luaL_Buffer b;
+  size_t lsep;
+  const char *sep = luaL_optlstring(L, 2, "", &lsep);
+  int i = luaL_optint(L, 3, 1);
+  int n = luaL_optint(L, 4, 0);
+  luaL_checktype(L, 1, LUA_TTABLE);
+  if (n == 0) n = luaL_getn(L, 1);
+  luaL_buffinit(L, &b);
+  for (; i <= n; i++) {
+    lua_rawgeti(L, 1, i);
+    luaL_argcheck(L, lua_isstring(L, -1), 1, "table contains non-strings");
+    luaL_addvalue(&b);
+    if (i != n)
+      luaL_addlstring(&b, sep, lsep);
+  }
+  luaL_pushresult(&b);
+  return 1;
+}
+
+
+
+/*
+** {======================================================
+** Quicksort
+** (based on `Algorithms in MODULA-3', Robert Sedgewick;
+**  Addison-Wesley, 1993.)
+*/
+
+
+static void set2 (lua_State *L, int i, int j) {
+  lua_rawseti(L, 1, i);
+  lua_rawseti(L, 1, j);
+}
+
+static int sort_comp (lua_State *L, int a, int b) {
+  if (!lua_isnil(L, 2)) {  /* function? */
+    int res;
+    lua_pushvalue(L, 2);
+    lua_pushvalue(L, a-1);  /* -1 to compensate function */
+    lua_pushvalue(L, b-2);  /* -2 to compensate function and `a' */
+    lua_call(L, 2, 1);
+    res = lua_toboolean(L, -1);
+    lua_pop(L, 1);
+    return res;
+  }
+  else  /* a < b? */
+    return lua_lessthan(L, a, b);
+}
+
+static void auxsort (lua_State *L, int l, int u) {
+  while (l < u) {  /* for tail recursion */
+    int i, j;
+    /* sort elements a[l], a[(l+u)/2] and a[u] */
+    lua_rawgeti(L, 1, l);
+    lua_rawgeti(L, 1, u);
+    if (sort_comp(L, -1, -2))  /* a[u] < a[l]? */
+      set2(L, l, u);  /* swap a[l] - a[u] */
+    else
+      lua_pop(L, 2);
+    if (u-l == 1) break;  /* only 2 elements */
+    i = (l+u)/2;
+    lua_rawgeti(L, 1, i);
+    lua_rawgeti(L, 1, l);
+    if (sort_comp(L, -2, -1))  /* a[i]<a[l]? */
+      set2(L, i, l);
+    else {
+      lua_pop(L, 1);  /* remove a[l] */
+      lua_rawgeti(L, 1, u);
+      if (sort_comp(L, -1, -2))  /* a[u]<a[i]? */
+        set2(L, i, u);
+      else
+        lua_pop(L, 2);
+    }
+    if (u-l == 2) break;  /* only 3 elements */
+    lua_rawgeti(L, 1, i);  /* Pivot */
+    lua_pushvalue(L, -1);
+    lua_rawgeti(L, 1, u-1);
+    set2(L, i, u-1);
+    /* a[l] <= P == a[u-1] <= a[u], only need to sort from l+1 to u-2 */
+    i = l; j = u-1;
+    for (;;) {  /* invariant: a[l..i] <= P <= a[j..u] */
+      /* repeat ++i until a[i] >= P */
+      while (lua_rawgeti(L, 1, ++i), sort_comp(L, -1, -2)) {
+        if (i>u) luaL_error(L, "invalid order function for sorting");
+        lua_pop(L, 1);  /* remove a[i] */
+      }
+      /* repeat --j until a[j] <= P */
+      while (lua_rawgeti(L, 1, --j), sort_comp(L, -3, -1)) {
+        if (j<l) luaL_error(L, "invalid order function for sorting");
+        lua_pop(L, 1);  /* remove a[j] */
+      }
+      if (j<i) {
+        lua_pop(L, 3);  /* pop pivot, a[i], a[j] */
+        break;
+      }
+      set2(L, i, j);
+    }
+    lua_rawgeti(L, 1, u-1);
+    lua_rawgeti(L, 1, i);
+    set2(L, u-1, i);  /* swap pivot (a[u-1]) with a[i] */
+    /* a[l..i-1] <= a[i] == P <= a[i+1..u] */
+    /* adjust so that smaller half is in [j..i] and larger one in [l..u] */
+    if (i-l < u-i) {
+      j=l; i=i-1; l=i+2;
+    }
+    else {
+      j=i+1; i=u; u=j-2;
+    }
+    auxsort(L, j, i);  /* call recursively the smaller one */
+  }  /* repeat the routine for the larger one */
+}
+
+static int luaB_sort (lua_State *L) {
+  int n = aux_getn(L, 1);
+  luaL_checkstack(L, 40, "");  /* assume array is smaller than 2^40 */
+  if (!lua_isnoneornil(L, 2))  /* is there a 2nd argument? */
+    luaL_checktype(L, 2, LUA_TFUNCTION);
+  lua_settop(L, 2);  /* make sure there is two arguments */
+  auxsort(L, 1, n);
+  return 0;
+}
+
+/* }====================================================== */
+
+
+static const luaL_reg tab_funcs[] = {
+  {"concat", str_concat},
+  {"foreach", luaB_foreach},
+  {"foreachi", luaB_foreachi},
+  {"getn", luaB_getn},
+  {"setn", luaB_setn},
+  {"sort", luaB_sort},
+  {"insert", luaB_tinsert},
+  {"remove", luaB_tremove},
+  {NULL, NULL}
+};
+
+
+LUALIB_API int luaopen_table (lua_State *L) {
+  luaL_openlib(L, LUA_TABLIBNAME, tab_funcs, 0);
+  return 1;
+}
+
diff --git a/lib/lua/src/lapi.c b/lib/lua/src/lapi.c
index 48646b9..038d5bf 100644
--- a/lib/lua/src/lapi.c
+++ b/lib/lua/src/lapi.c
@@ -1,922 +1,922 @@
-/*

-** $Id: lapi.c,v 1.3 2004-11-27 21:35:20 pixel Exp $

-** Lua API

-** See Copyright Notice in lua.h

-*/

-

-

-#include <assert.h>

-#include <string.h>

-

-#define lapi_c

-

-#include "lua.h"

-

-#include "lapi.h"

-#include "ldebug.h"

-#include "ldo.h"

-#include "lfunc.h"

-#include "lgc.h"

-#include "lmem.h"

-#include "lobject.h"

-#include "lstate.h"

-#include "lstring.h"

-#include "ltable.h"

-#include "ltm.h"

-#include "lundump.h"

-#include "lvm.h"

-

-

-const char lua_ident[] =

-  "$Lua: " LUA_VERSION " " LUA_COPYRIGHT " $\n"

-  "$Authors: " LUA_AUTHORS " $\n"

-  "$URL: www.lua.org $\n";

-

-

-

-#ifndef api_check

-#define api_check(L, o)		/*{ assert(o); }*/

-#endif

-

-#define api_checknelems(L, n)	api_check(L, (n) <= (L->top - L->base))

-

-#define api_incr_top(L)   {api_check(L, L->top < L->ci->top); L->top++;}

-

-

-

-

-static TObject *negindex (lua_State *L, int idx) {

-  if (idx > LUA_REGISTRYINDEX) {

-    api_check(L, idx != 0 && -idx <= L->top - L->base);

-    return L->top+idx;

-  }

-  else switch (idx) {  /* pseudo-indices */

-    case LUA_REGISTRYINDEX: return registry(L);

-    case LUA_GLOBALSINDEX: return gt(L);

-    default: {

-      TObject *func = (L->base - 1);

-      idx = LUA_GLOBALSINDEX - idx;

-      lua_assert(iscfunction(func));

-      return (idx <= clvalue(func)->c.nupvalues)

-                ? &clvalue(func)->c.upvalue[idx-1]

-                : NULL;

-    }

-  }

-}

-

-

-static TObject *luaA_index (lua_State *L, int idx) {

-  if (idx > 0) {

-    api_check(L, idx <= L->top - L->base);

-    return L->base + idx - 1;

-  }

-  else {

-    TObject *o = negindex(L, idx);

-    api_check(L, o != NULL);

-    return o;

-  }

-}

-

-

-static TObject *luaA_indexAcceptable (lua_State *L, int idx) {

-  if (idx > 0) {

-    TObject *o = L->base+(idx-1);

-    api_check(L, idx <= L->stack_last - L->base);

-    if (o >= L->top) return NULL;

-    else return o;

-  }

-  else

-    return negindex(L, idx);

-}

-

-

-void luaA_pushobject (lua_State *L, const TObject *o) {

-  setobj2s(L->top, o);

-  incr_top(L);

-}

-

-

-LUA_API int lua_checkstack (lua_State *L, int size) {

-  int res;

-  lua_lock(L);

-  if ((L->top - L->base + size) > LUA_MAXCSTACK)

-    res = 0;  /* stack overflow */

-  else {

-    luaD_checkstack(L, size);

-    if (L->ci->top < L->top + size)

-      L->ci->top = L->top + size;

-    res = 1;

-  }

-  lua_unlock(L);

-  return res;

-}

-

-

-LUA_API void lua_xmove (lua_State *from, lua_State *to, int n) {

-  int i;

-  lua_lock(to);

-  api_checknelems(from, n);

-  from->top -= n;

-  for (i = 0; i < n; i++) {

-    setobj2s(to->top, from->top + i);

-    api_incr_top(to);

-  }

-  lua_unlock(to);

-}

-

-

-LUA_API lua_CFunction lua_atpanic (lua_State *L, lua_CFunction panicf) {

-  lua_CFunction old;

-  lua_lock(L);

-  old = G(L)->panic;

-  G(L)->panic = panicf;

-  lua_unlock(L);

-  return old;

-}

-

-

-LUA_API lua_State *lua_newthread (lua_State *L) {

-  lua_State *L1;

-  lua_lock(L);

-  luaC_checkGC(L);

-  L1 = luaE_newthread(L);

-  setthvalue(L->top, L1);

-  api_incr_top(L);

-  lua_unlock(L);

-  lua_userstateopen(L1);

-  return L1;

-}

-

-

-

-/*

-** basic stack manipulation

-*/

-

-

-LUA_API int lua_gettop (lua_State *L) {

-  return (L->top - L->base);

-}

-

-

-LUA_API void lua_settop (lua_State *L, int idx) {

-  lua_lock(L);

-  if (idx >= 0) {

-    api_check(L, idx <= L->stack_last - L->base);

-    while (L->top < L->base + idx)

-      setnilvalue(L->top++);

-    L->top = L->base + idx;

-  }

-  else {

-    api_check(L, -(idx+1) <= (L->top - L->base));

-    L->top += idx+1;  /* `subtract' index (index is negative) */

-  }

-  lua_unlock(L);

-}

-

-

-LUA_API void lua_remove (lua_State *L, int idx) {

-  StkId p;

-  lua_lock(L);

-  p = luaA_index(L, idx);

-  while (++p < L->top) setobjs2s(p-1, p);

-  L->top--;

-  lua_unlock(L);

-}

-

-

-LUA_API void lua_insert (lua_State *L, int idx) {

-  StkId p;

-  StkId q;

-  lua_lock(L);

-  p = luaA_index(L, idx);

-  for (q = L->top; q>p; q--) setobjs2s(q, q-1);

-  setobjs2s(p, L->top);

-  lua_unlock(L);

-}

-

-

-LUA_API void lua_replace (lua_State *L, int idx) {

-  lua_lock(L);

-  api_checknelems(L, 1);

-  setobj(luaA_index(L, idx), L->top - 1);  /* write barrier */

-  L->top--;

-  lua_unlock(L);

-}

-

-

-LUA_API void lua_pushvalue (lua_State *L, int idx) {

-  lua_lock(L);

-  setobj2s(L->top, luaA_index(L, idx));

-  api_incr_top(L);

-  lua_unlock(L);

-}

-

-

-

-/*

-** access functions (stack -> C)

-*/

-

-

-LUA_API int lua_type (lua_State *L, int idx) {

-  StkId o = luaA_indexAcceptable(L, idx);

-  return (o == NULL) ? LUA_TNONE : ttype(o);

-}

-

-

-LUA_API const char *lua_typename (lua_State *L, int t) {

-  UNUSED(L);

-  return (t == LUA_TNONE) ? "no value" : luaT_typenames[t];

-}

-

-

-LUA_API int lua_iscfunction (lua_State *L, int idx) {

-  StkId o = luaA_indexAcceptable(L, idx);

-  return (o == NULL) ? 0 : iscfunction(o);

-}

-

-

-LUA_API int lua_isnumber (lua_State *L, int idx) {

-  TObject n;

-  const TObject *o = luaA_indexAcceptable(L, idx);

-  return (o != NULL && tonumber(o, &n));

-}

-

-

-LUA_API int lua_isstring (lua_State *L, int idx) {

-  int t = lua_type(L, idx);

-  return (t == LUA_TSTRING || t == LUA_TNUMBER);

-}

-

-

-LUA_API int lua_isuserdata (lua_State *L, int idx) {

-  const TObject *o = luaA_indexAcceptable(L, idx);

-  return (o != NULL && (ttisuserdata(o) || ttislightuserdata(o)));

-}

-

-

-LUA_API int lua_rawequal (lua_State *L, int index1, int index2) {

-  StkId o1 = luaA_indexAcceptable(L, index1);

-  StkId o2 = luaA_indexAcceptable(L, index2);

-  return (o1 == NULL || o2 == NULL) ? 0  /* index out of range */

-                                    : luaO_rawequalObj(o1, o2);

-}

-

-

-LUA_API int lua_equal (lua_State *L, int index1, int index2) {

-  StkId o1, o2;

-  int i;

-  lua_lock(L);  /* may call tag method */

-  o1 = luaA_indexAcceptable(L, index1);

-  o2 = luaA_indexAcceptable(L, index2);

-  i = (o1 == NULL || o2 == NULL) ? 0  /* index out of range */

-                                 : equalobj(L, o1, o2);

-  lua_unlock(L);

-  return i;

-}

-

-

-LUA_API int lua_lessthan (lua_State *L, int index1, int index2) {

-  StkId o1, o2;

-  int i;

-  lua_lock(L);  /* may call tag method */

-  o1 = luaA_indexAcceptable(L, index1);

-  o2 = luaA_indexAcceptable(L, index2);

-  i = (o1 == NULL || o2 == NULL) ? 0  /* index out-of-range */

-                                 : luaV_lessthan(L, o1, o2);

-  lua_unlock(L);

-  return i;

-}

-

-

-

-LUA_API lua_Number lua_tonumber (lua_State *L, int idx) {

-  TObject n;

-  const TObject *o = luaA_indexAcceptable(L, idx);

-  if (o != NULL && tonumber(o, &n))

-    return nvalue(o);

-  else

-    return 0;

-}

-

-

-LUA_API int lua_toboolean (lua_State *L, int idx) {

-  const TObject *o = luaA_indexAcceptable(L, idx);

-  return (o != NULL) && !l_isfalse(o);

-}

-

-

-LUA_API const char *lua_tostring (lua_State *L, int idx) {

-  StkId o = luaA_indexAcceptable(L, idx);

-  if (o == NULL)

-    return NULL;

-  else if (ttisstring(o))

-    return svalue(o);

-  else {

-    const char *s;

-    lua_lock(L);  /* `luaV_tostring' may create a new string */

-    s = (luaV_tostring(L, o) ? svalue(o) : NULL);

-    luaC_checkGC(L);

-    lua_unlock(L);

-    return s;

-  }

-}

-

-

-LUA_API size_t lua_strlen (lua_State *L, int idx) {

-  StkId o = luaA_indexAcceptable(L, idx);

-  if (o == NULL)

-    return 0;

-  else if (ttisstring(o))

-    return tsvalue(o)->tsv.len;

-  else {

-    size_t l;

-    lua_lock(L);  /* `luaV_tostring' may create a new string */

-    l = (luaV_tostring(L, o) ? tsvalue(o)->tsv.len : 0);

-    lua_unlock(L);

-    return l;

-  }

-}

-

-

-LUA_API lua_CFunction lua_tocfunction (lua_State *L, int idx) {

-  StkId o = luaA_indexAcceptable(L, idx);

-  return (o == NULL || !iscfunction(o)) ? NULL : clvalue(o)->c.f;

-}

-

-

-LUA_API void *lua_touserdata (lua_State *L, int idx) {

-  StkId o = luaA_indexAcceptable(L, idx);

-  if (o == NULL) return NULL;

-  switch (ttype(o)) {

-    case LUA_TUSERDATA: return (uvalue(o) + 1);

-    case LUA_TLIGHTUSERDATA: return pvalue(o);

-    default: return NULL;

-  }

-}

-

-

-LUA_API lua_State *lua_tothread (lua_State *L, int idx) {

-  StkId o = luaA_indexAcceptable(L, idx);

-  return (o == NULL || !ttisthread(o)) ? NULL : thvalue(o);

-}

-

-

-LUA_API const void *lua_topointer (lua_State *L, int idx) {

-  StkId o = luaA_indexAcceptable(L, idx);

-  if (o == NULL) return NULL;

-  else {

-    switch (ttype(o)) {

-      case LUA_TTABLE: return hvalue(o);

-      case LUA_TFUNCTION: return clvalue(o);

-      case LUA_TTHREAD: return thvalue(o);

-      case LUA_TUSERDATA:

-      case LUA_TLIGHTUSERDATA:

-        return lua_touserdata(L, idx);

-      default: return NULL;

-    }

-  }

-}

-

-

-

-/*

-** push functions (C -> stack)

-*/

-

-

-LUA_API void lua_pushnil (lua_State *L) {

-  lua_lock(L);

-  setnilvalue(L->top);

-  api_incr_top(L);

-  lua_unlock(L);

-}

-

-

-LUA_API void lua_pushnumber (lua_State *L, lua_Number n) {

-  lua_lock(L);

-  setnvalue(L->top, n);

-  api_incr_top(L);

-  lua_unlock(L);

-}

-

-

-LUA_API void lua_pushlstring (lua_State *L, const char *s, size_t len) {

-  lua_lock(L);

-  luaC_checkGC(L);

-  setsvalue2s(L->top, luaS_newlstr(L, s, len));

-  api_incr_top(L);

-  lua_unlock(L);

-}

-

-

-LUA_API void lua_pushstring (lua_State *L, const char *s) {

-  if (s == NULL)

-    lua_pushnil(L);

-  else

-    lua_pushlstring(L, s, strlen(s));

-}

-

-

-LUA_API const char *lua_pushvfstring (lua_State *L, const char *fmt,

-                                      va_list argp) {

-  const char *ret;

-  lua_lock(L);

-  luaC_checkGC(L);

-  ret = luaO_pushvfstring(L, fmt, argp);

-  lua_unlock(L);

-  return ret;

-}

-

-

-LUA_API const char *lua_pushfstring (lua_State *L, const char *fmt, ...) {

-  const char *ret;

-  va_list argp;

-  lua_lock(L);

-  luaC_checkGC(L);

-  va_start(argp, fmt);

-  ret = luaO_pushvfstring(L, fmt, argp);

-  va_end(argp);

-  lua_unlock(L);

-  return ret;

-}

-

-

-LUA_API void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n) {

-  Closure *cl;

-  lua_lock(L);

-  luaC_checkGC(L);

-  api_checknelems(L, n);

-  cl = luaF_newCclosure(L, n);

-  cl->c.f = fn;

-  L->top -= n;

-  while (n--)

-    setobj2n(&cl->c.upvalue[n], L->top+n);

-  setclvalue(L->top, cl);

-  api_incr_top(L);

-  lua_unlock(L);

-}

-

-

-LUA_API void lua_pushboolean (lua_State *L, int b) {

-  lua_lock(L);

-  setbvalue(L->top, (b != 0));  /* ensure that true is 1 */

-  api_incr_top(L);

-  lua_unlock(L);

-}

-

-

-LUA_API void lua_pushlightuserdata (lua_State *L, void *p) {

-  lua_lock(L);

-  setpvalue(L->top, p);

-  api_incr_top(L);

-  lua_unlock(L);

-}

-

-

-

-/*

-** get functions (Lua -> stack)

-*/

-

-

-LUA_API void lua_gettable (lua_State *L, int idx) {

-  StkId t;

-  lua_lock(L);

-  t = luaA_index(L, idx);

-  setobj2s(L->top - 1, luaV_gettable(L, t, L->top - 1, 0));

-  lua_unlock(L);

-}

-

-

-LUA_API void lua_rawget (lua_State *L, int idx) {

-  StkId t;

-  lua_lock(L);

-  t = luaA_index(L, idx);

-  api_check(L, ttistable(t));

-  setobj2s(L->top - 1, luaH_get(hvalue(t), L->top - 1));

-  lua_unlock(L);

-}

-

-

-LUA_API void lua_rawgeti (lua_State *L, int idx, int n) {

-  StkId o;

-  lua_lock(L);

-  o = luaA_index(L, idx);

-  api_check(L, ttistable(o));

-  setobj2s(L->top, luaH_getnum(hvalue(o), n));

-  api_incr_top(L);

-  lua_unlock(L);

-}

-

-

-LUA_API void lua_newtable (lua_State *L) {

-  lua_lock(L);

-  luaC_checkGC(L);

-  sethvalue(L->top, luaH_new(L, 0, 0));

-  api_incr_top(L);

-  lua_unlock(L);

-}

-

-

-LUA_API int lua_getmetatable (lua_State *L, int objindex) {

-  const TObject *obj;

-  Table *mt = NULL;

-  int res;

-  lua_lock(L);

-  obj = luaA_indexAcceptable(L, objindex);

-  if (obj != NULL) {

-    switch (ttype(obj)) {

-      case LUA_TTABLE:

-        mt = hvalue(obj)->metatable;

-        break;

-      case LUA_TUSERDATA:

-        mt = uvalue(obj)->uv.metatable;

-        break;

-    }

-  }

-  if (mt == NULL || mt == hvalue(defaultmeta(L)))

-    res = 0;

-  else {

-    sethvalue(L->top, mt);

-    api_incr_top(L);

-    res = 1;

-  }

-  lua_unlock(L);

-  return res;

-}

-

-

-LUA_API void lua_getfenv (lua_State *L, int idx) {

-  StkId o;

-  lua_lock(L);

-  o = luaA_index(L, idx);

-  setobj2s(L->top, isLfunction(o) ? &clvalue(o)->l.g : gt(L));

-  api_incr_top(L);

-  lua_unlock(L);

-}

-

-

-/*

-** set functions (stack -> Lua)

-*/

-

-

-LUA_API void lua_settable (lua_State *L, int idx) {

-  StkId t;

-  lua_lock(L);

-  api_checknelems(L, 2);

-  t = luaA_index(L, idx);

-  luaV_settable(L, t, L->top - 2, L->top - 1);

-  L->top -= 2;  /* pop index and value */

-  lua_unlock(L);

-}

-

-

-LUA_API void lua_rawset (lua_State *L, int idx) {

-  StkId t;

-  lua_lock(L);

-  api_checknelems(L, 2);

-  t = luaA_index(L, idx);

-  api_check(L, ttistable(t));

-  setobj2t(luaH_set(L, hvalue(t), L->top-2), L->top-1);  /* write barrier */

-  L->top -= 2;

-  lua_unlock(L);

-}

-

-

-LUA_API void lua_rawseti (lua_State *L, int idx, int n) {

-  StkId o;

-  lua_lock(L);

-  api_checknelems(L, 1);

-  o = luaA_index(L, idx);

-  api_check(L, ttistable(o));

-  setobj2t(luaH_setnum(L, hvalue(o), n), L->top-1);  /* write barrier */

-  L->top--;

-  lua_unlock(L);

-}

-

-

-LUA_API int lua_setmetatable (lua_State *L, int objindex) {

-  TObject *obj, *mt;

-  int res = 1;

-  lua_lock(L);

-  api_checknelems(L, 1);

-  obj = luaA_index(L, objindex);

-  mt = (!ttisnil(L->top - 1)) ? L->top - 1 : defaultmeta(L);

-  api_check(L, ttistable(mt));

-  switch (ttype(obj)) {

-    case LUA_TTABLE: {

-      hvalue(obj)->metatable = hvalue(mt);  /* write barrier */

-      break;

-    }

-    case LUA_TUSERDATA: {

-      uvalue(obj)->uv.metatable = hvalue(mt);  /* write barrier */

-      break;

-    }

-    default: {

-      res = 0;  /* cannot set */

-      break;

-    }

-  }

-  L->top--;

-  lua_unlock(L);

-  return res;

-}

-

-

-LUA_API int lua_setfenv (lua_State *L, int idx) {

-  StkId o;

-  int res = 0;

-  lua_lock(L);

-  api_checknelems(L, 1);

-  o = luaA_index(L, idx);

-  L->top--;

-  api_check(L, ttistable(L->top));

-  if (isLfunction(o)) {

-    res = 1;

-    clvalue(o)->l.g = *(L->top);

-  }

-  lua_unlock(L);

-  return res;

-}

-

-

-/*

-** `load' and `call' functions (run Lua code)

-*/

-

-LUA_API void lua_call (lua_State *L, int nargs, int nresults) {

-  StkId func;

-  lua_lock(L);

-  api_checknelems(L, nargs+1);

-  func = L->top - (nargs+1);

-  luaD_call(L, func, nresults);

-  lua_unlock(L);

-}

-

-

-

-/*

-** Execute a protected call.

-*/

-struct CallS {  /* data to `f_call' */

-  StkId func;

-  int nresults;

-};

-

-

-static void f_call (lua_State *L, void *ud) {

-  struct CallS *c = cast(struct CallS *, ud);

-  luaD_call(L, c->func, c->nresults);

-}

-

-

-

-LUA_API int lua_pcall (lua_State *L, int nargs, int nresults, int errfunc) {

-  struct CallS c;

-  int status;

-  ptrdiff_t func;

-  lua_lock(L);

-  func = (errfunc == 0) ? 0 : savestack(L, luaA_index(L, errfunc));

-  c.func = L->top - (nargs+1);  /* function to be called */

-  c.nresults = nresults;

-  status = luaD_pcall(L, f_call, &c, savestack(L, c.func), func);

-  lua_unlock(L);

-  return status;

-}

-

-

-/*

-** Execute a protected C call.

-*/

-struct CCallS {  /* data to `f_Ccall' */

-  lua_CFunction func;

-  void *ud;

-};

-

-

-static void f_Ccall (lua_State *L, void *ud) {

-  struct CCallS *c = cast(struct CCallS *, ud);

-  Closure *cl;

-  cl = luaF_newCclosure(L, 0);

-  cl->c.f = c->func;

-  setclvalue(L->top, cl);  /* push function */

-  incr_top(L);

-  setpvalue(L->top, c->ud);  /* push only argument */

-  incr_top(L);

-  luaD_call(L, L->top - 2, 0);

-}

-

-

-LUA_API int lua_cpcall (lua_State *L, lua_CFunction func, void *ud) {

-  struct CCallS c;

-  int status;

-  lua_lock(L);

-  c.func = func;

-  c.ud = ud;

-  status = luaD_pcall(L, f_Ccall, &c, savestack(L, L->top), 0);

-  lua_unlock(L);

-  return status;

-}

-

-

-LUA_API int lua_load (lua_State *L, lua_Chunkreader reader, void *data,

-                      const char *chunkname) {

-  ZIO z;

-  int status;

-  int c;

-  lua_lock(L);

-  if (!chunkname) chunkname = "?";

-  luaZ_init(&z, reader, data, chunkname);

-  c = luaZ_lookahead(&z);

-  status = luaD_protectedparser(L, &z, (c == LUA_SIGNATURE[0]));

-  lua_unlock(L);

-  return status;

-}

-

-

-LUA_API int lua_dump (lua_State *L, lua_Chunkwriter writer, void *data) {

-  int status;

-  TObject *o;

-  lua_lock(L);

-  api_checknelems(L, 1);

-  o = L->top - 1;

-  if (isLfunction(o) && clvalue(o)->l.nupvalues == 0) {

-    luaU_dump(L, clvalue(o)->l.p, writer, data);

-    status = 1;

-  }

-  else

-    status = 0;

-  lua_unlock(L);

-  return status;

-}

-

-

-/*

-** Garbage-collection functions

-*/

-

-/* GC values are expressed in Kbytes: #bytes/2^10 */

-#define GCscalel(x)		((x)>>10)

-#define GCscale(x)		(cast(int, GCscalel(x)))

-#define GCunscale(x)		(cast(lu_mem, x)<<10)

-

-LUA_API int lua_getgcthreshold (lua_State *L) {

-  int threshold;

-  lua_lock(L);

-  threshold = GCscale(G(L)->GCthreshold);

-  lua_unlock(L);

-  return threshold;

-}

-

-LUA_API int lua_getgccount (lua_State *L) {

-  int count;

-  lua_lock(L);

-  count = GCscale(G(L)->nblocks);

-  lua_unlock(L);

-  return count;

-}

-

-LUA_API void lua_setgcthreshold (lua_State *L, int newthreshold) {

-  lua_lock(L);

-  if (cast(lu_mem, newthreshold) > GCscalel(MAX_LUMEM))

-    G(L)->GCthreshold = MAX_LUMEM;

-  else

-    G(L)->GCthreshold = GCunscale(newthreshold);

-  luaC_checkGC(L);

-  lua_unlock(L);

-}

-

-

-/*

-** miscellaneous functions

-*/

-

-

-LUA_API const char *lua_version (void) {

-  return LUA_VERSION;

-}

-

-

-LUA_API int lua_error (lua_State *L) {

-  lua_lock(L);

-  api_checknelems(L, 1);

-  luaG_errormsg(L);

-  lua_unlock(L);

-  return 0;  /* to avoid warnings */

-}

-

-

-LUA_API int lua_next (lua_State *L, int idx) {

-  StkId t;

-  int more;

-  lua_lock(L);

-  t = luaA_index(L, idx);

-  api_check(L, ttistable(t));

-  more = luaH_next(L, hvalue(t), L->top - 1);

-  if (more) {

-    api_incr_top(L);

-  }

-  else  /* no more elements */

-    L->top -= 1;  /* remove key */

-  lua_unlock(L);

-  return more;

-}

-

-

-LUA_API void lua_concat (lua_State *L, int n) {

-  lua_lock(L);

-  luaC_checkGC(L);

-  api_checknelems(L, n);

-  if (n >= 2) {

-    luaV_concat(L, n, L->top - L->base - 1);

-    L->top -= (n-1);

-  }

-  else if (n == 0) {  /* push empty string */

-    setsvalue2s(L->top, luaS_newlstr(L, NULL, 0));

-    api_incr_top(L);

-  }

-  /* else n == 1; nothing to do */

-  lua_unlock(L);

-}

-

-

-LUA_API void *lua_newuserdata (lua_State *L, size_t size) {

-  Udata *u;

-  lua_lock(L);

-  luaC_checkGC(L);

-  u = luaS_newudata(L, size);

-  setuvalue(L->top, u);

-  api_incr_top(L);

-  lua_unlock(L);

-  return u + 1;

-}

-

-

-LUA_API int lua_pushupvalues (lua_State *L) {

-  Closure *func;

-  int n, i;

-  lua_lock(L);

-  api_check(L, iscfunction(L->base - 1));

-  func = clvalue(L->base - 1);

-  n = func->c.nupvalues;

-  luaD_checkstack(L, n + LUA_MINSTACK);

-  for (i=0; i<n; i++) {

-    setobj2s(L->top, &func->c.upvalue[i]);

-    L->top++;

-  }

-  lua_unlock(L);

-  return n;

-}

-

-

-static const char *aux_upvalue (lua_State *L, int funcindex, int n,

-                                TObject **val) {

-  Closure *f;

-  StkId fi = luaA_index(L, funcindex);

-  if (!ttisfunction(fi)) return NULL;

-  f = clvalue(fi);

-  if (f->c.isC) {

-    if (n > f->c.nupvalues) return NULL;

-    *val = &f->c.upvalue[n-1];

-    return "";

-  }

-  else {

-    Proto *p = f->l.p;

-    if (n > p->sizeupvalues) return NULL;

-    *val = f->l.upvals[n-1]->v;

-    return getstr(p->upvalues[n-1]);

-  }

-}

-

-

-LUA_API const char *lua_getupvalue (lua_State *L, int funcindex, int n) {

-  const char *name;

-  TObject *val;

-  lua_lock(L);

-  name = aux_upvalue(L, funcindex, n, &val);

-  if (name) {

-    setobj2s(L->top, val);

-    api_incr_top(L);

-  }

-  lua_unlock(L);

-  return name;

-}

-

-

-LUA_API const char *lua_setupvalue (lua_State *L, int funcindex, int n) {

-  const char *name;

-  TObject *val;

-  lua_lock(L);

-  api_checknelems(L, 1);

-  name = aux_upvalue(L, funcindex, n, &val);

-  if (name) {

-    L->top--;

-    setobj(val, L->top);  /* write barrier */

-  }

-  lua_unlock(L);

-  return name;

-}

-

+/*
+** $Id: lapi.c,v 1.4 2004-11-27 21:46:07 pixel Exp $
+** Lua API
+** See Copyright Notice in lua.h
+*/
+
+
+#include <assert.h>
+#include <string.h>
+
+#define lapi_c
+
+#include "lua.h"
+
+#include "lapi.h"
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lgc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+#include "lundump.h"
+#include "lvm.h"
+
+
+const char lua_ident[] =
+  "$Lua: " LUA_VERSION " " LUA_COPYRIGHT " $\n"
+  "$Authors: " LUA_AUTHORS " $\n"
+  "$URL: www.lua.org $\n";
+
+
+
+#ifndef api_check
+#define api_check(L, o)		/*{ assert(o); }*/
+#endif
+
+#define api_checknelems(L, n)	api_check(L, (n) <= (L->top - L->base))
+
+#define api_incr_top(L)   {api_check(L, L->top < L->ci->top); L->top++;}
+
+
+
+
+static TObject *negindex (lua_State *L, int idx) {
+  if (idx > LUA_REGISTRYINDEX) {
+    api_check(L, idx != 0 && -idx <= L->top - L->base);
+    return L->top+idx;
+  }
+  else switch (idx) {  /* pseudo-indices */
+    case LUA_REGISTRYINDEX: return registry(L);
+    case LUA_GLOBALSINDEX: return gt(L);
+    default: {
+      TObject *func = (L->base - 1);
+      idx = LUA_GLOBALSINDEX - idx;
+      lua_assert(iscfunction(func));
+      return (idx <= clvalue(func)->c.nupvalues)
+                ? &clvalue(func)->c.upvalue[idx-1]
+                : NULL;
+    }
+  }
+}
+
+
+static TObject *luaA_index (lua_State *L, int idx) {
+  if (idx > 0) {
+    api_check(L, idx <= L->top - L->base);
+    return L->base + idx - 1;
+  }
+  else {
+    TObject *o = negindex(L, idx);
+    api_check(L, o != NULL);
+    return o;
+  }
+}
+
+
+static TObject *luaA_indexAcceptable (lua_State *L, int idx) {
+  if (idx > 0) {
+    TObject *o = L->base+(idx-1);
+    api_check(L, idx <= L->stack_last - L->base);
+    if (o >= L->top) return NULL;
+    else return o;
+  }
+  else
+    return negindex(L, idx);
+}
+
+
+void luaA_pushobject (lua_State *L, const TObject *o) {
+  setobj2s(L->top, o);
+  incr_top(L);
+}
+
+
+LUA_API int lua_checkstack (lua_State *L, int size) {
+  int res;
+  lua_lock(L);
+  if ((L->top - L->base + size) > LUA_MAXCSTACK)
+    res = 0;  /* stack overflow */
+  else {
+    luaD_checkstack(L, size);
+    if (L->ci->top < L->top + size)
+      L->ci->top = L->top + size;
+    res = 1;
+  }
+  lua_unlock(L);
+  return res;
+}
+
+
+LUA_API void lua_xmove (lua_State *from, lua_State *to, int n) {
+  int i;
+  lua_lock(to);
+  api_checknelems(from, n);
+  from->top -= n;
+  for (i = 0; i < n; i++) {
+    setobj2s(to->top, from->top + i);
+    api_incr_top(to);
+  }
+  lua_unlock(to);
+}
+
+
+LUA_API lua_CFunction lua_atpanic (lua_State *L, lua_CFunction panicf) {
+  lua_CFunction old;
+  lua_lock(L);
+  old = G(L)->panic;
+  G(L)->panic = panicf;
+  lua_unlock(L);
+  return old;
+}
+
+
+LUA_API lua_State *lua_newthread (lua_State *L) {
+  lua_State *L1;
+  lua_lock(L);
+  luaC_checkGC(L);
+  L1 = luaE_newthread(L);
+  setthvalue(L->top, L1);
+  api_incr_top(L);
+  lua_unlock(L);
+  lua_userstateopen(L1);
+  return L1;
+}
+
+
+
+/*
+** basic stack manipulation
+*/
+
+
+LUA_API int lua_gettop (lua_State *L) {
+  return (L->top - L->base);
+}
+
+
+LUA_API void lua_settop (lua_State *L, int idx) {
+  lua_lock(L);
+  if (idx >= 0) {
+    api_check(L, idx <= L->stack_last - L->base);
+    while (L->top < L->base + idx)
+      setnilvalue(L->top++);
+    L->top = L->base + idx;
+  }
+  else {
+    api_check(L, -(idx+1) <= (L->top - L->base));
+    L->top += idx+1;  /* `subtract' index (index is negative) */
+  }
+  lua_unlock(L);
+}
+
+
+LUA_API void lua_remove (lua_State *L, int idx) {
+  StkId p;
+  lua_lock(L);
+  p = luaA_index(L, idx);
+  while (++p < L->top) setobjs2s(p-1, p);
+  L->top--;
+  lua_unlock(L);
+}
+
+
+LUA_API void lua_insert (lua_State *L, int idx) {
+  StkId p;
+  StkId q;
+  lua_lock(L);
+  p = luaA_index(L, idx);
+  for (q = L->top; q>p; q--) setobjs2s(q, q-1);
+  setobjs2s(p, L->top);
+  lua_unlock(L);
+}
+
+
+LUA_API void lua_replace (lua_State *L, int idx) {
+  lua_lock(L);
+  api_checknelems(L, 1);
+  setobj(luaA_index(L, idx), L->top - 1);  /* write barrier */
+  L->top--;
+  lua_unlock(L);
+}
+
+
+LUA_API void lua_pushvalue (lua_State *L, int idx) {
+  lua_lock(L);
+  setobj2s(L->top, luaA_index(L, idx));
+  api_incr_top(L);
+  lua_unlock(L);
+}
+
+
+
+/*
+** access functions (stack -> C)
+*/
+
+
+LUA_API int lua_type (lua_State *L, int idx) {
+  StkId o = luaA_indexAcceptable(L, idx);
+  return (o == NULL) ? LUA_TNONE : ttype(o);
+}
+
+
+LUA_API const char *lua_typename (lua_State *L, int t) {
+  UNUSED(L);
+  return (t == LUA_TNONE) ? "no value" : luaT_typenames[t];
+}
+
+
+LUA_API int lua_iscfunction (lua_State *L, int idx) {
+  StkId o = luaA_indexAcceptable(L, idx);
+  return (o == NULL) ? 0 : iscfunction(o);
+}
+
+
+LUA_API int lua_isnumber (lua_State *L, int idx) {
+  TObject n;
+  const TObject *o = luaA_indexAcceptable(L, idx);
+  return (o != NULL && tonumber(o, &n));
+}
+
+
+LUA_API int lua_isstring (lua_State *L, int idx) {
+  int t = lua_type(L, idx);
+  return (t == LUA_TSTRING || t == LUA_TNUMBER);
+}
+
+
+LUA_API int lua_isuserdata (lua_State *L, int idx) {
+  const TObject *o = luaA_indexAcceptable(L, idx);
+  return (o != NULL && (ttisuserdata(o) || ttislightuserdata(o)));
+}
+
+
+LUA_API int lua_rawequal (lua_State *L, int index1, int index2) {
+  StkId o1 = luaA_indexAcceptable(L, index1);
+  StkId o2 = luaA_indexAcceptable(L, index2);
+  return (o1 == NULL || o2 == NULL) ? 0  /* index out of range */
+                                    : luaO_rawequalObj(o1, o2);
+}
+
+
+LUA_API int lua_equal (lua_State *L, int index1, int index2) {
+  StkId o1, o2;
+  int i;
+  lua_lock(L);  /* may call tag method */
+  o1 = luaA_indexAcceptable(L, index1);
+  o2 = luaA_indexAcceptable(L, index2);
+  i = (o1 == NULL || o2 == NULL) ? 0  /* index out of range */
+                                 : equalobj(L, o1, o2);
+  lua_unlock(L);
+  return i;
+}
+
+
+LUA_API int lua_lessthan (lua_State *L, int index1, int index2) {
+  StkId o1, o2;
+  int i;
+  lua_lock(L);  /* may call tag method */
+  o1 = luaA_indexAcceptable(L, index1);
+  o2 = luaA_indexAcceptable(L, index2);
+  i = (o1 == NULL || o2 == NULL) ? 0  /* index out-of-range */
+                                 : luaV_lessthan(L, o1, o2);
+  lua_unlock(L);
+  return i;
+}
+
+
+
+LUA_API lua_Number lua_tonumber (lua_State *L, int idx) {
+  TObject n;
+  const TObject *o = luaA_indexAcceptable(L, idx);
+  if (o != NULL && tonumber(o, &n))
+    return nvalue(o);
+  else
+    return 0;
+}
+
+
+LUA_API int lua_toboolean (lua_State *L, int idx) {
+  const TObject *o = luaA_indexAcceptable(L, idx);
+  return (o != NULL) && !l_isfalse(o);
+}
+
+
+LUA_API const char *lua_tostring (lua_State *L, int idx) {
+  StkId o = luaA_indexAcceptable(L, idx);
+  if (o == NULL)
+    return NULL;
+  else if (ttisstring(o))
+    return svalue(o);
+  else {
+    const char *s;
+    lua_lock(L);  /* `luaV_tostring' may create a new string */
+    s = (luaV_tostring(L, o) ? svalue(o) : NULL);
+    luaC_checkGC(L);
+    lua_unlock(L);
+    return s;
+  }
+}
+
+
+LUA_API size_t lua_strlen (lua_State *L, int idx) {
+  StkId o = luaA_indexAcceptable(L, idx);
+  if (o == NULL)
+    return 0;
+  else if (ttisstring(o))
+    return tsvalue(o)->tsv.len;
+  else {
+    size_t l;
+    lua_lock(L);  /* `luaV_tostring' may create a new string */
+    l = (luaV_tostring(L, o) ? tsvalue(o)->tsv.len : 0);
+    lua_unlock(L);
+    return l;
+  }
+}
+
+
+LUA_API lua_CFunction lua_tocfunction (lua_State *L, int idx) {
+  StkId o = luaA_indexAcceptable(L, idx);
+  return (o == NULL || !iscfunction(o)) ? NULL : clvalue(o)->c.f;
+}
+
+
+LUA_API void *lua_touserdata (lua_State *L, int idx) {
+  StkId o = luaA_indexAcceptable(L, idx);
+  if (o == NULL) return NULL;
+  switch (ttype(o)) {
+    case LUA_TUSERDATA: return (uvalue(o) + 1);
+    case LUA_TLIGHTUSERDATA: return pvalue(o);
+    default: return NULL;
+  }
+}
+
+
+LUA_API lua_State *lua_tothread (lua_State *L, int idx) {
+  StkId o = luaA_indexAcceptable(L, idx);
+  return (o == NULL || !ttisthread(o)) ? NULL : thvalue(o);
+}
+
+
+LUA_API const void *lua_topointer (lua_State *L, int idx) {
+  StkId o = luaA_indexAcceptable(L, idx);
+  if (o == NULL) return NULL;
+  else {
+    switch (ttype(o)) {
+      case LUA_TTABLE: return hvalue(o);
+      case LUA_TFUNCTION: return clvalue(o);
+      case LUA_TTHREAD: return thvalue(o);
+      case LUA_TUSERDATA:
+      case LUA_TLIGHTUSERDATA:
+        return lua_touserdata(L, idx);
+      default: return NULL;
+    }
+  }
+}
+
+
+
+/*
+** push functions (C -> stack)
+*/
+
+
+LUA_API void lua_pushnil (lua_State *L) {
+  lua_lock(L);
+  setnilvalue(L->top);
+  api_incr_top(L);
+  lua_unlock(L);
+}
+
+
+LUA_API void lua_pushnumber (lua_State *L, lua_Number n) {
+  lua_lock(L);
+  setnvalue(L->top, n);
+  api_incr_top(L);
+  lua_unlock(L);
+}
+
+
+LUA_API void lua_pushlstring (lua_State *L, const char *s, size_t len) {
+  lua_lock(L);
+  luaC_checkGC(L);
+  setsvalue2s(L->top, luaS_newlstr(L, s, len));
+  api_incr_top(L);
+  lua_unlock(L);
+}
+
+
+LUA_API void lua_pushstring (lua_State *L, const char *s) {
+  if (s == NULL)
+    lua_pushnil(L);
+  else
+    lua_pushlstring(L, s, strlen(s));
+}
+
+
+LUA_API const char *lua_pushvfstring (lua_State *L, const char *fmt,
+                                      va_list argp) {
+  const char *ret;
+  lua_lock(L);
+  luaC_checkGC(L);
+  ret = luaO_pushvfstring(L, fmt, argp);
+  lua_unlock(L);
+  return ret;
+}
+
+
+LUA_API const char *lua_pushfstring (lua_State *L, const char *fmt, ...) {
+  const char *ret;
+  va_list argp;
+  lua_lock(L);
+  luaC_checkGC(L);
+  va_start(argp, fmt);
+  ret = luaO_pushvfstring(L, fmt, argp);
+  va_end(argp);
+  lua_unlock(L);
+  return ret;
+}
+
+
+LUA_API void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n) {
+  Closure *cl;
+  lua_lock(L);
+  luaC_checkGC(L);
+  api_checknelems(L, n);
+  cl = luaF_newCclosure(L, n);
+  cl->c.f = fn;
+  L->top -= n;
+  while (n--)
+    setobj2n(&cl->c.upvalue[n], L->top+n);
+  setclvalue(L->top, cl);
+  api_incr_top(L);
+  lua_unlock(L);
+}
+
+
+LUA_API void lua_pushboolean (lua_State *L, int b) {
+  lua_lock(L);
+  setbvalue(L->top, (b != 0));  /* ensure that true is 1 */
+  api_incr_top(L);
+  lua_unlock(L);
+}
+
+
+LUA_API void lua_pushlightuserdata (lua_State *L, void *p) {
+  lua_lock(L);
+  setpvalue(L->top, p);
+  api_incr_top(L);
+  lua_unlock(L);
+}
+
+
+
+/*
+** get functions (Lua -> stack)
+*/
+
+
+LUA_API void lua_gettable (lua_State *L, int idx) {
+  StkId t;
+  lua_lock(L);
+  t = luaA_index(L, idx);
+  setobj2s(L->top - 1, luaV_gettable(L, t, L->top - 1, 0));
+  lua_unlock(L);
+}
+
+
+LUA_API void lua_rawget (lua_State *L, int idx) {
+  StkId t;
+  lua_lock(L);
+  t = luaA_index(L, idx);
+  api_check(L, ttistable(t));
+  setobj2s(L->top - 1, luaH_get(hvalue(t), L->top - 1));
+  lua_unlock(L);
+}
+
+
+LUA_API void lua_rawgeti (lua_State *L, int idx, int n) {
+  StkId o;
+  lua_lock(L);
+  o = luaA_index(L, idx);
+  api_check(L, ttistable(o));
+  setobj2s(L->top, luaH_getnum(hvalue(o), n));
+  api_incr_top(L);
+  lua_unlock(L);
+}
+
+
+LUA_API void lua_newtable (lua_State *L) {
+  lua_lock(L);
+  luaC_checkGC(L);
+  sethvalue(L->top, luaH_new(L, 0, 0));
+  api_incr_top(L);
+  lua_unlock(L);
+}
+
+
+LUA_API int lua_getmetatable (lua_State *L, int objindex) {
+  const TObject *obj;
+  Table *mt = NULL;
+  int res;
+  lua_lock(L);
+  obj = luaA_indexAcceptable(L, objindex);
+  if (obj != NULL) {
+    switch (ttype(obj)) {
+      case LUA_TTABLE:
+        mt = hvalue(obj)->metatable;
+        break;
+      case LUA_TUSERDATA:
+        mt = uvalue(obj)->uv.metatable;
+        break;
+    }
+  }
+  if (mt == NULL || mt == hvalue(defaultmeta(L)))
+    res = 0;
+  else {
+    sethvalue(L->top, mt);
+    api_incr_top(L);
+    res = 1;
+  }
+  lua_unlock(L);
+  return res;
+}
+
+
+LUA_API void lua_getfenv (lua_State *L, int idx) {
+  StkId o;
+  lua_lock(L);
+  o = luaA_index(L, idx);
+  setobj2s(L->top, isLfunction(o) ? &clvalue(o)->l.g : gt(L));
+  api_incr_top(L);
+  lua_unlock(L);
+}
+
+
+/*
+** set functions (stack -> Lua)
+*/
+
+
+LUA_API void lua_settable (lua_State *L, int idx) {
+  StkId t;
+  lua_lock(L);
+  api_checknelems(L, 2);
+  t = luaA_index(L, idx);
+  luaV_settable(L, t, L->top - 2, L->top - 1);
+  L->top -= 2;  /* pop index and value */
+  lua_unlock(L);
+}
+
+
+LUA_API void lua_rawset (lua_State *L, int idx) {
+  StkId t;
+  lua_lock(L);
+  api_checknelems(L, 2);
+  t = luaA_index(L, idx);
+  api_check(L, ttistable(t));
+  setobj2t(luaH_set(L, hvalue(t), L->top-2), L->top-1);  /* write barrier */
+  L->top -= 2;
+  lua_unlock(L);
+}
+
+
+LUA_API void lua_rawseti (lua_State *L, int idx, int n) {
+  StkId o;
+  lua_lock(L);
+  api_checknelems(L, 1);
+  o = luaA_index(L, idx);
+  api_check(L, ttistable(o));
+  setobj2t(luaH_setnum(L, hvalue(o), n), L->top-1);  /* write barrier */
+  L->top--;
+  lua_unlock(L);
+}
+
+
+LUA_API int lua_setmetatable (lua_State *L, int objindex) {
+  TObject *obj, *mt;
+  int res = 1;
+  lua_lock(L);
+  api_checknelems(L, 1);
+  obj = luaA_index(L, objindex);
+  mt = (!ttisnil(L->top - 1)) ? L->top - 1 : defaultmeta(L);
+  api_check(L, ttistable(mt));
+  switch (ttype(obj)) {
+    case LUA_TTABLE: {
+      hvalue(obj)->metatable = hvalue(mt);  /* write barrier */
+      break;
+    }
+    case LUA_TUSERDATA: {
+      uvalue(obj)->uv.metatable = hvalue(mt);  /* write barrier */
+      break;
+    }
+    default: {
+      res = 0;  /* cannot set */
+      break;
+    }
+  }
+  L->top--;
+  lua_unlock(L);
+  return res;
+}
+
+
+LUA_API int lua_setfenv (lua_State *L, int idx) {
+  StkId o;
+  int res = 0;
+  lua_lock(L);
+  api_checknelems(L, 1);
+  o = luaA_index(L, idx);
+  L->top--;
+  api_check(L, ttistable(L->top));
+  if (isLfunction(o)) {
+    res = 1;
+    clvalue(o)->l.g = *(L->top);
+  }
+  lua_unlock(L);
+  return res;
+}
+
+
+/*
+** `load' and `call' functions (run Lua code)
+*/
+
+LUA_API void lua_call (lua_State *L, int nargs, int nresults) {
+  StkId func;
+  lua_lock(L);
+  api_checknelems(L, nargs+1);
+  func = L->top - (nargs+1);
+  luaD_call(L, func, nresults);
+  lua_unlock(L);
+}
+
+
+
+/*
+** Execute a protected call.
+*/
+struct CallS {  /* data to `f_call' */
+  StkId func;
+  int nresults;
+};
+
+
+static void f_call (lua_State *L, void *ud) {
+  struct CallS *c = cast(struct CallS *, ud);
+  luaD_call(L, c->func, c->nresults);
+}
+
+
+
+LUA_API int lua_pcall (lua_State *L, int nargs, int nresults, int errfunc) {
+  struct CallS c;
+  int status;
+  ptrdiff_t func;
+  lua_lock(L);
+  func = (errfunc == 0) ? 0 : savestack(L, luaA_index(L, errfunc));
+  c.func = L->top - (nargs+1);  /* function to be called */
+  c.nresults = nresults;
+  status = luaD_pcall(L, f_call, &c, savestack(L, c.func), func);
+  lua_unlock(L);
+  return status;
+}
+
+
+/*
+** Execute a protected C call.
+*/
+struct CCallS {  /* data to `f_Ccall' */
+  lua_CFunction func;
+  void *ud;
+};
+
+
+static void f_Ccall (lua_State *L, void *ud) {
+  struct CCallS *c = cast(struct CCallS *, ud);
+  Closure *cl;
+  cl = luaF_newCclosure(L, 0);
+  cl->c.f = c->func;
+  setclvalue(L->top, cl);  /* push function */
+  incr_top(L);
+  setpvalue(L->top, c->ud);  /* push only argument */
+  incr_top(L);
+  luaD_call(L, L->top - 2, 0);
+}
+
+
+LUA_API int lua_cpcall (lua_State *L, lua_CFunction func, void *ud) {
+  struct CCallS c;
+  int status;
+  lua_lock(L);
+  c.func = func;
+  c.ud = ud;
+  status = luaD_pcall(L, f_Ccall, &c, savestack(L, L->top), 0);
+  lua_unlock(L);
+  return status;
+}
+
+
+LUA_API int lua_load (lua_State *L, lua_Chunkreader reader, void *data,
+                      const char *chunkname) {
+  ZIO z;
+  int status;
+  int c;
+  lua_lock(L);
+  if (!chunkname) chunkname = "?";
+  luaZ_init(&z, reader, data, chunkname);
+  c = luaZ_lookahead(&z);
+  status = luaD_protectedparser(L, &z, (c == LUA_SIGNATURE[0]));
+  lua_unlock(L);
+  return status;
+}
+
+
+LUA_API int lua_dump (lua_State *L, lua_Chunkwriter writer, void *data) {
+  int status;
+  TObject *o;
+  lua_lock(L);
+  api_checknelems(L, 1);
+  o = L->top - 1;
+  if (isLfunction(o) && clvalue(o)->l.nupvalues == 0) {
+    luaU_dump(L, clvalue(o)->l.p, writer, data);
+    status = 1;
+  }
+  else
+    status = 0;
+  lua_unlock(L);
+  return status;
+}
+
+
+/*
+** Garbage-collection functions
+*/
+
+/* GC values are expressed in Kbytes: #bytes/2^10 */
+#define GCscalel(x)		((x)>>10)
+#define GCscale(x)		(cast(int, GCscalel(x)))
+#define GCunscale(x)		(cast(lu_mem, x)<<10)
+
+LUA_API int lua_getgcthreshold (lua_State *L) {
+  int threshold;
+  lua_lock(L);
+  threshold = GCscale(G(L)->GCthreshold);
+  lua_unlock(L);
+  return threshold;
+}
+
+LUA_API int lua_getgccount (lua_State *L) {
+  int count;
+  lua_lock(L);
+  count = GCscale(G(L)->nblocks);
+  lua_unlock(L);
+  return count;
+}
+
+LUA_API void lua_setgcthreshold (lua_State *L, int newthreshold) {
+  lua_lock(L);
+  if (cast(lu_mem, newthreshold) > GCscalel(MAX_LUMEM))
+    G(L)->GCthreshold = MAX_LUMEM;
+  else
+    G(L)->GCthreshold = GCunscale(newthreshold);
+  luaC_checkGC(L);
+  lua_unlock(L);
+}
+
+
+/*
+** miscellaneous functions
+*/
+
+
+LUA_API const char *lua_version (void) {
+  return LUA_VERSION;
+}
+
+
+LUA_API int lua_error (lua_State *L) {
+  lua_lock(L);
+  api_checknelems(L, 1);
+  luaG_errormsg(L);
+  lua_unlock(L);
+  return 0;  /* to avoid warnings */
+}
+
+
+LUA_API int lua_next (lua_State *L, int idx) {
+  StkId t;
+  int more;
+  lua_lock(L);
+  t = luaA_index(L, idx);
+  api_check(L, ttistable(t));
+  more = luaH_next(L, hvalue(t), L->top - 1);
+  if (more) {
+    api_incr_top(L);
+  }
+  else  /* no more elements */
+    L->top -= 1;  /* remove key */
+  lua_unlock(L);
+  return more;
+}
+
+
+LUA_API void lua_concat (lua_State *L, int n) {
+  lua_lock(L);
+  luaC_checkGC(L);
+  api_checknelems(L, n);
+  if (n >= 2) {
+    luaV_concat(L, n, L->top - L->base - 1);
+    L->top -= (n-1);
+  }
+  else if (n == 0) {  /* push empty string */
+    setsvalue2s(L->top, luaS_newlstr(L, NULL, 0));
+    api_incr_top(L);
+  }
+  /* else n == 1; nothing to do */
+  lua_unlock(L);
+}
+
+
+LUA_API void *lua_newuserdata (lua_State *L, size_t size) {
+  Udata *u;
+  lua_lock(L);
+  luaC_checkGC(L);
+  u = luaS_newudata(L, size);
+  setuvalue(L->top, u);
+  api_incr_top(L);
+  lua_unlock(L);
+  return u + 1;
+}
+
+
+LUA_API int lua_pushupvalues (lua_State *L) {
+  Closure *func;
+  int n, i;
+  lua_lock(L);
+  api_check(L, iscfunction(L->base - 1));
+  func = clvalue(L->base - 1);
+  n = func->c.nupvalues;
+  luaD_checkstack(L, n + LUA_MINSTACK);
+  for (i=0; i<n; i++) {
+    setobj2s(L->top, &func->c.upvalue[i]);
+    L->top++;
+  }
+  lua_unlock(L);
+  return n;
+}
+
+
+static const char *aux_upvalue (lua_State *L, int funcindex, int n,
+                                TObject **val) {
+  Closure *f;
+  StkId fi = luaA_index(L, funcindex);
+  if (!ttisfunction(fi)) return NULL;
+  f = clvalue(fi);
+  if (f->c.isC) {
+    if (n > f->c.nupvalues) return NULL;
+    *val = &f->c.upvalue[n-1];
+    return "";
+  }
+  else {
+    Proto *p = f->l.p;
+    if (n > p->sizeupvalues) return NULL;
+    *val = f->l.upvals[n-1]->v;
+    return getstr(p->upvalues[n-1]);
+  }
+}
+
+
+LUA_API const char *lua_getupvalue (lua_State *L, int funcindex, int n) {
+  const char *name;
+  TObject *val;
+  lua_lock(L);
+  name = aux_upvalue(L, funcindex, n, &val);
+  if (name) {
+    setobj2s(L->top, val);
+    api_incr_top(L);
+  }
+  lua_unlock(L);
+  return name;
+}
+
+
+LUA_API const char *lua_setupvalue (lua_State *L, int funcindex, int n) {
+  const char *name;
+  TObject *val;
+  lua_lock(L);
+  api_checknelems(L, 1);
+  name = aux_upvalue(L, funcindex, n, &val);
+  if (name) {
+    L->top--;
+    setobj(val, L->top);  /* write barrier */
+  }
+  lua_unlock(L);
+  return name;
+}
+
diff --git a/lib/lua/src/lcode.c b/lib/lua/src/lcode.c
index a873ed8..0b2f6b1 100644
--- a/lib/lua/src/lcode.c
+++ b/lib/lua/src/lcode.c
@@ -1,714 +1,714 @@
-/*

-** $Id: lcode.c,v 1.3 2004-11-27 21:35:20 pixel Exp $

-** Code generator for Lua

-** See Copyright Notice in lua.h

-*/

-

-

-#include <stdlib.h>

-

-#define lcode_c

-

-#include "lua.h"

-

-#include "lcode.h"

-#include "ldebug.h"

-#include "ldo.h"

-#include "llex.h"

-#include "lmem.h"

-#include "lobject.h"

-#include "lopcodes.h"

-#include "lparser.h"

-#include "ltable.h"

-

-

-#define hasjumps(e)	((e)->t != (e)->f)

-

-

-void luaK_nil (FuncState *fs, int from, int n) {

-  Instruction *previous;

-  if (fs->pc > fs->lasttarget &&  /* no jumps to current position? */

-      GET_OPCODE(*(previous = &fs->f->code[fs->pc-1])) == OP_LOADNIL) {

-    int pfrom = GETARG_A(*previous);

-    int pto = GETARG_B(*previous);

-    if (pfrom <= from && from <= pto+1) {  /* can connect both? */

-      if (from+n-1 > pto)

-        SETARG_B(*previous, from+n-1);

-      return;

-    }

-  }

-  luaK_codeABC(fs, OP_LOADNIL, from, from+n-1, 0);  /* else no optimization */

-}

-

-

-int luaK_jump (FuncState *fs) {

-  int jpc = fs->jpc;  /* save list of jumps to here */

-  int j;

-  fs->jpc = NO_JUMP;

-  j = luaK_codeAsBx(fs, OP_JMP, 0, NO_JUMP);

-  luaK_concat(fs, &j, jpc);  /* keep them on hold */

-  return j;

-}

-

-

-static int luaK_condjump (FuncState *fs, OpCode op, int A, int B, int C) {

-  luaK_codeABC(fs, op, A, B, C);

-  return luaK_jump(fs);

-}

-

-

-static void luaK_fixjump (FuncState *fs, int pc, int dest) {

-  Instruction *jmp = &fs->f->code[pc];

-  int offset = dest-(pc+1);

-  lua_assert(dest != NO_JUMP);

-  if (abs(offset) > MAXARG_sBx)

-    luaX_syntaxerror(fs->ls, "control structure too long");

-  SETARG_sBx(*jmp, offset);

-}

-

-

-/*

-** returns current `pc' and marks it as a jump target (to avoid wrong

-** optimizations with consecutive instructions not in the same basic block).

-*/

-int luaK_getlabel (FuncState *fs) {

-  fs->lasttarget = fs->pc;

-  return fs->pc;

-}

-

-

-static int luaK_getjump (FuncState *fs, int pc) {

-  int offset = GETARG_sBx(fs->f->code[pc]);

-  if (offset == NO_JUMP)  /* point to itself represents end of list */

-    return NO_JUMP;  /* end of list */

-  else

-    return (pc+1)+offset;  /* turn offset into absolute position */

-}

-

-

-static Instruction *getjumpcontrol (FuncState *fs, int pc) {

-  Instruction *pi = &fs->f->code[pc];

-  if (pc >= 1 && testOpMode(GET_OPCODE(*(pi-1)), OpModeT))

-    return pi-1;

-  else

-    return pi;

-}

-

-

-/*

-** check whether list has any jump that do not produce a value

-** (or produce an inverted value)

-*/

-static int need_value (FuncState *fs, int list, int cond) {

-  for (; list != NO_JUMP; list = luaK_getjump(fs, list)) {

-    Instruction i = *getjumpcontrol(fs, list);

-    if (GET_OPCODE(i) != OP_TEST || GETARG_C(i) != cond) return 1;

-  }

-  return 0;  /* not found */

-}

-

-

-static void patchtestreg (Instruction *i, int reg) {

-  if (reg == NO_REG) reg = GETARG_B(*i);

-  SETARG_A(*i, reg);

-}

-

-

-static void luaK_patchlistaux (FuncState *fs, int list,

-          int ttarget, int treg, int ftarget, int freg, int dtarget) {

-  while (list != NO_JUMP) {

-    int next = luaK_getjump(fs, list);

-    Instruction *i = getjumpcontrol(fs, list);

-    if (GET_OPCODE(*i) != OP_TEST) {

-      lua_assert(dtarget != NO_JUMP);

-      luaK_fixjump(fs, list, dtarget);  /* jump to default target */

-    }

-    else {

-      if (GETARG_C(*i)) {

-        lua_assert(ttarget != NO_JUMP);

-        patchtestreg(i, treg);

-        luaK_fixjump(fs, list, ttarget);

-      }

-      else {

-        lua_assert(ftarget != NO_JUMP);

-        patchtestreg(i, freg);

-        luaK_fixjump(fs, list, ftarget);

-      }

-    }

-    list = next;

-  }

-}

-

-

-static void luaK_dischargejpc (FuncState *fs) {

-  luaK_patchlistaux(fs, fs->jpc, fs->pc, NO_REG, fs->pc, NO_REG, fs->pc);

-  fs->jpc = NO_JUMP;

-}

-

-

-void luaK_patchlist (FuncState *fs, int list, int target) {

-  if (target == fs->pc)

-    luaK_patchtohere(fs, list);

-  else {

-    lua_assert(target < fs->pc);

-    luaK_patchlistaux(fs, list, target, NO_REG, target, NO_REG, target);

-  }

-}

-

-

-void luaK_patchtohere (FuncState *fs, int list) {

-  luaK_getlabel(fs);

-  luaK_concat(fs, &fs->jpc, list);

-}

-

-

-void luaK_concat (FuncState *fs, int *l1, int l2) {

-  if (l2 == NO_JUMP) return;

-  else if (*l1 == NO_JUMP)

-    *l1 = l2;

-  else {

-    int list = *l1;

-    int next;

-    while ((next = luaK_getjump(fs, list)) != NO_JUMP)  /* find last element */

-      list = next;

-    luaK_fixjump(fs, list, l2);

-  }

-}

-

-

-void luaK_checkstack (FuncState *fs, int n) {

-  int newstack = fs->freereg + n;

-  if (newstack > fs->f->maxstacksize) {

-    if (newstack >= MAXSTACK)

-      luaX_syntaxerror(fs->ls, "function or expression too complex");

-    fs->f->maxstacksize = cast(lu_byte, newstack);

-  }

-}

-

-

-void luaK_reserveregs (FuncState *fs, int n) {

-  luaK_checkstack(fs, n);

-  fs->freereg += n;

-}

-

-

-static void freereg (FuncState *fs, int reg) {

-  if (reg >= fs->nactvar && reg < MAXSTACK) {

-    fs->freereg--;

-    lua_assert(reg == fs->freereg);

-  }

-}

-

-

-static void freeexp (FuncState *fs, expdesc *e) {

-  if (e->k == VNONRELOC)

-    freereg(fs, e->info);

-}

-

-

-static int addk (FuncState *fs, TObject *k, TObject *v) {

-  const TObject *idx = luaH_get(fs->h, k);

-  if (ttisnumber(idx)) {

-    lua_assert(luaO_rawequalObj(&fs->f->k[cast(int, nvalue(idx))], v));

-    return cast(int, nvalue(idx));

-  }

-  else {  /* constant not found; create a new entry */

-    Proto *f = fs->f;

-    luaM_growvector(fs->L, f->k, fs->nk, f->sizek, TObject,

-                    MAXARG_Bx, "constant table overflow");

-    setobj2n(&f->k[fs->nk], v);

-    setnvalue(luaH_set(fs->L, fs->h, k), cast(lua_Number, fs->nk));

-    return fs->nk++;

-  }

-}

-

-

-int luaK_stringK (FuncState *fs, TString *s) {

-  TObject o;

-  setsvalue(&o, s);

-  return addk(fs, &o, &o);

-}

-

-

-int luaK_numberK (FuncState *fs, lua_Number r) {

-  TObject o;

-  setnvalue(&o, r);

-  return addk(fs, &o, &o);

-}

-

-

-static int nil_constant (FuncState *fs) {

-  TObject k, v;

-  setnilvalue(&v);

-  sethvalue(&k, fs->h);  /* cannot use nil as key; instead use table itself */

-  return addk(fs, &k, &v);

-}

-

-

-void luaK_setcallreturns (FuncState *fs, expdesc *e, int nresults) {

-  if (e->k == VCALL) {  /* expression is an open function call? */

-    SETARG_C(getcode(fs, e), nresults+1);

-    if (nresults == 1) {  /* `regular' expression? */

-      e->k = VNONRELOC;

-      e->info = GETARG_A(getcode(fs, e));

-    }

-  }

-}

-

-

-void luaK_dischargevars (FuncState *fs, expdesc *e) {

-  switch (e->k) {

-    case VLOCAL: {

-      e->k = VNONRELOC;

-      break;

-    }

-    case VUPVAL: {

-      e->info = luaK_codeABC(fs, OP_GETUPVAL, 0, e->info, 0);

-      e->k = VRELOCABLE;

-      break;

-    }

-    case VGLOBAL: {

-      e->info = luaK_codeABx(fs, OP_GETGLOBAL, 0, e->info);

-      e->k = VRELOCABLE;

-      break;

-    }

-    case VINDEXED: {

-      freereg(fs, e->aux);

-      freereg(fs, e->info);

-      e->info = luaK_codeABC(fs, OP_GETTABLE, 0, e->info, e->aux);

-      e->k = VRELOCABLE;

-      break;

-    }

-    case VCALL: {

-      luaK_setcallreturns(fs, e, 1);

-      break;

-    }

-    default: break;  /* there is one value available (somewhere) */

-  }

-}

-

-

-static int code_label (FuncState *fs, int A, int b, int jump) {

-  luaK_getlabel(fs);  /* those instructions may be jump targets */

-  return luaK_codeABC(fs, OP_LOADBOOL, A, b, jump);

-}

-

-

-static void discharge2reg (FuncState *fs, expdesc *e, int reg) {

-  luaK_dischargevars(fs, e);

-  switch (e->k) {

-    case VNIL: {

-      luaK_nil(fs, reg, 1);

-      break;

-    }

-    case VFALSE:  case VTRUE: {

-      luaK_codeABC(fs, OP_LOADBOOL, reg, e->k == VTRUE, 0);

-      break;

-    }

-    case VK: {

-      luaK_codeABx(fs, OP_LOADK, reg, e->info);

-      break;

-    }

-    case VRELOCABLE: {

-      Instruction *pc = &getcode(fs, e);

-      SETARG_A(*pc, reg);

-      break;

-    }

-    case VNONRELOC: {

-      if (reg != e->info)

-        luaK_codeABC(fs, OP_MOVE, reg, e->info, 0);

-      break;

-    }

-    default: {

-      lua_assert(e->k == VVOID || e->k == VJMP);

-      return;  /* nothing to do... */

-    }

-  }

-  e->info = reg;

-  e->k = VNONRELOC;

-}

-

-

-static void discharge2anyreg (FuncState *fs, expdesc *e) {

-  if (e->k != VNONRELOC) {

-    luaK_reserveregs(fs, 1);

-    discharge2reg(fs, e, fs->freereg-1);

-  }

-}

-

-

-static void luaK_exp2reg (FuncState *fs, expdesc *e, int reg) {

-  discharge2reg(fs, e, reg);

-  if (e->k == VJMP)

-    luaK_concat(fs, &e->t, e->info);  /* put this jump in `t' list */

-  if (hasjumps(e)) {

-    int final;  /* position after whole expression */

-    int p_f = NO_JUMP;  /* position of an eventual LOAD false */

-    int p_t = NO_JUMP;  /* position of an eventual LOAD true */

-    if (need_value(fs, e->t, 1) || need_value(fs, e->f, 0)) {

-      int fj = NO_JUMP;  /* first jump (over LOAD ops.) */

-      if (e->k != VJMP)

-        fj = luaK_jump(fs);

-      p_f = code_label(fs, reg, 0, 1);

-      p_t = code_label(fs, reg, 1, 0);

-      luaK_patchtohere(fs, fj);

-    }

-    final = luaK_getlabel(fs);

-    luaK_patchlistaux(fs, e->f, p_f, NO_REG, final, reg, p_f);

-    luaK_patchlistaux(fs, e->t, final, reg, p_t, NO_REG, p_t);

-  }

-  e->f = e->t = NO_JUMP;

-  e->info = reg;

-  e->k = VNONRELOC;

-}

-

-

-void luaK_exp2nextreg (FuncState *fs, expdesc *e) {

-  luaK_dischargevars(fs, e);

-  freeexp(fs, e);

-  luaK_reserveregs(fs, 1);

-  luaK_exp2reg(fs, e, fs->freereg - 1);

-}

-

-

-int luaK_exp2anyreg (FuncState *fs, expdesc *e) {

-  luaK_dischargevars(fs, e);

-  if (e->k == VNONRELOC) {

-    if (!hasjumps(e)) return e->info;  /* exp is already in a register */ 

-    if (e->info >= fs->nactvar) {  /* reg. is not a local? */

-      luaK_exp2reg(fs, e, e->info);  /* put value on it */

-      return e->info;

-    }

-  }

-  luaK_exp2nextreg(fs, e);  /* default */

-  return e->info;

-}

-

-

-void luaK_exp2val (FuncState *fs, expdesc *e) {

-  if (hasjumps(e))

-    luaK_exp2anyreg(fs, e);

-  else

-    luaK_dischargevars(fs, e);

-}

-

-

-int luaK_exp2RK (FuncState *fs, expdesc *e) {

-  luaK_exp2val(fs, e);

-  switch (e->k) {

-    case VNIL: {

-      if (fs->nk + MAXSTACK <= MAXARG_C) {  /* constant fit in argC? */

-        e->info = nil_constant(fs);

-        e->k = VK;

-        return e->info + MAXSTACK;

-      }

-      else break;

-    }

-    case VK: {

-      if (e->info + MAXSTACK <= MAXARG_C)  /* constant fit in argC? */

-        return e->info + MAXSTACK;

-      else break;

-    }

-    default: break;

-  }

-  /* not a constant in the right range: put it in a register */

-  return luaK_exp2anyreg(fs, e);

-}

-

-

-void luaK_storevar (FuncState *fs, expdesc *var, expdesc *exp) {

-  switch (var->k) {

-    case VLOCAL: {

-      freeexp(fs, exp);

-      luaK_exp2reg(fs, exp, var->info);

-      return;

-    }

-    case VUPVAL: {

-      int e = luaK_exp2anyreg(fs, exp);

-      luaK_codeABC(fs, OP_SETUPVAL, e, var->info, 0);

-      break;

-    }

-    case VGLOBAL: {

-      int e = luaK_exp2anyreg(fs, exp);

-      luaK_codeABx(fs, OP_SETGLOBAL, e, var->info);

-      break;

-    }

-    case VINDEXED: {

-      int e = luaK_exp2RK(fs, exp);

-      luaK_codeABC(fs, OP_SETTABLE, var->info, var->aux, e);

-      break;

-    }

-    default: {

-      lua_assert(0);  /* invalid var kind to store */

-      break;

-    }

-  }

-  freeexp(fs, exp);

-}

-

-

-void luaK_self (FuncState *fs, expdesc *e, expdesc *key) {

-  int func;

-  luaK_exp2anyreg(fs, e);

-  freeexp(fs, e);

-  func = fs->freereg;

-  luaK_reserveregs(fs, 2);

-  luaK_codeABC(fs, OP_SELF, func, e->info, luaK_exp2RK(fs, key));

-  freeexp(fs, key);

-  e->info = func;

-  e->k = VNONRELOC;

-}

-

-

-static void invertjump (FuncState *fs, expdesc *e) {

-  Instruction *pc = getjumpcontrol(fs, e->info);

-  lua_assert(testOpMode(GET_OPCODE(*pc), OpModeT) &&

-             GET_OPCODE(*pc) != OP_TEST);

-  SETARG_A(*pc, !(GETARG_A(*pc)));

-}

-

-

-static int jumponcond (FuncState *fs, expdesc *e, int cond) {

-  if (e->k == VRELOCABLE) {

-    Instruction ie = getcode(fs, e);

-    if (GET_OPCODE(ie) == OP_NOT) {

-      fs->pc--;  /* remove previous OP_NOT */

-      return luaK_condjump(fs, OP_TEST, NO_REG, GETARG_B(ie), !cond);

-    }

-    /* else go through */

-  }

-  discharge2anyreg(fs, e);

-  freeexp(fs, e);

-  return luaK_condjump(fs, OP_TEST, NO_REG, e->info, cond);

-}

-

-

-void luaK_goiftrue (FuncState *fs, expdesc *e) {

-  int pc;  /* pc of last jump */

-  luaK_dischargevars(fs, e);

-  switch (e->k) {

-    case VK: case VTRUE: {

-      pc = NO_JUMP;  /* always true; do nothing */

-      break;

-    }

-    case VFALSE: {

-      pc = luaK_jump(fs);  /* always jump */

-      break;

-    }

-    case VJMP: {

-      invertjump(fs, e);

-      pc = e->info;

-      break;

-    }

-    default: {

-      pc = jumponcond(fs, e, 0);

-      break;

-    }

-  }

-  luaK_concat(fs, &e->f, pc);  /* insert last jump in `f' list */

-}

-

-

-void luaK_goiffalse (FuncState *fs, expdesc *e) {

-  int pc;  /* pc of last jump */

-  luaK_dischargevars(fs, e);

-  switch (e->k) {

-    case VNIL: case VFALSE: {

-      pc = NO_JUMP;  /* always false; do nothing */

-      break;

-    }

-    case VTRUE: {

-      pc = luaK_jump(fs);  /* always jump */

-      break;

-    }

-    case VJMP: {

-      pc = e->info;

-      break;

-    }

-    default: {

-      pc = jumponcond(fs, e, 1);

-      break;

-    }

-  }

-  luaK_concat(fs, &e->t, pc);  /* insert last jump in `t' list */

-}

-

-

-static void codenot (FuncState *fs, expdesc *e) {

-  luaK_dischargevars(fs, e);

-  switch (e->k) {

-    case VNIL: case VFALSE: {

-      e->k = VTRUE;

-      break;

-    }

-    case VK: case VTRUE: {

-      e->k = VFALSE;

-      break;

-    }

-    case VJMP: {

-      invertjump(fs, e);

-      break;

-    }

-    case VRELOCABLE:

-    case VNONRELOC: {

-      discharge2anyreg(fs, e);

-      freeexp(fs, e);

-      e->info = luaK_codeABC(fs, OP_NOT, 0, e->info, 0);

-      e->k = VRELOCABLE;

-      break;

-    }

-    default: {

-      lua_assert(0);  /* cannot happen */

-      break;

-    }

-  }

-  /* interchange true and false lists */

-  { int temp = e->f; e->f = e->t; e->t = temp; }

-}

-

-

-void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k) {

-  t->aux = luaK_exp2RK(fs, k);

-  t->k = VINDEXED;

-}

-

-

-void luaK_prefix (FuncState *fs, UnOpr op, expdesc *e) {

-  if (op == OPR_MINUS) {

-    luaK_exp2val(fs, e);

-    if (e->k == VK && ttisnumber(&fs->f->k[e->info]))

-      e->info = luaK_numberK(fs, -nvalue(&fs->f->k[e->info]));

-    else {

-      luaK_exp2anyreg(fs, e);

-      freeexp(fs, e);

-      e->info = luaK_codeABC(fs, OP_UNM, 0, e->info, 0);

-      e->k = VRELOCABLE;

-    }

-  }

-  else  /* op == NOT */

-    codenot(fs, e);

-}

-

-

-void luaK_infix (FuncState *fs, BinOpr op, expdesc *v) {

-  switch (op) {

-    case OPR_AND: {

-      luaK_goiftrue(fs, v);

-      luaK_patchtohere(fs, v->t);

-      v->t = NO_JUMP;

-      break;

-    }

-    case OPR_OR: {

-      luaK_goiffalse(fs, v);

-      luaK_patchtohere(fs, v->f);

-      v->f = NO_JUMP;

-      break;

-    }

-    case OPR_CONCAT: {

-      luaK_exp2nextreg(fs, v);  /* operand must be on the `stack' */

-      break;

-    }

-    default: {

-      luaK_exp2RK(fs, v);

-      break;

-    }

-  }

-}

-

-

-static void codebinop (FuncState *fs, expdesc *res, BinOpr op,

-                       int o1, int o2) {

-  if (op <= OPR_POW) {  /* arithmetic operator? */

-    OpCode opc = cast(OpCode, (op - OPR_ADD) + OP_ADD);  /* ORDER OP */

-    res->info = luaK_codeABC(fs, opc, 0, o1, o2);

-    res->k = VRELOCABLE;

-  }

-  else {  /* test operator */

-    static const OpCode ops[] = {OP_EQ, OP_EQ, OP_LT, OP_LE, OP_LT, OP_LE};

-    int cond = 1;

-    if (op >= OPR_GT) {  /* `>' or `>='? */

-      int temp;  /* exchange args and replace by `<' or `<=' */

-      temp = o1; o1 = o2; o2 = temp;  /* o1 <==> o2 */

-    }

-    else if (op == OPR_NE) cond = 0;

-    res->info = luaK_condjump(fs, ops[op - OPR_NE], cond, o1, o2);

-    res->k = VJMP;

-  }

-}

-

-

-void luaK_posfix (FuncState *fs, BinOpr op, expdesc *e1, expdesc *e2) {

-  switch (op) {

-    case OPR_AND: {

-      lua_assert(e1->t == NO_JUMP);  /* list must be closed */

-      luaK_dischargevars(fs, e2);

-      luaK_concat(fs, &e1->f, e2->f);

-      e1->k = e2->k; e1->info = e2->info; e1->aux = e2->aux; e1->t = e2->t;

-      break;

-    }

-    case OPR_OR: {

-      lua_assert(e1->f == NO_JUMP);  /* list must be closed */

-      luaK_dischargevars(fs, e2);

-      luaK_concat(fs, &e1->t, e2->t);

-      e1->k = e2->k; e1->info = e2->info; e1->aux = e2->aux; e1->f = e2->f;

-      break;

-    }

-    case OPR_CONCAT: {

-      luaK_exp2val(fs, e2);

-      if (e2->k == VRELOCABLE && GET_OPCODE(getcode(fs, e2)) == OP_CONCAT) {

-        lua_assert(e1->info == GETARG_B(getcode(fs, e2))-1);

-        freeexp(fs, e1);

-        SETARG_B(getcode(fs, e2), e1->info);

-        e1->k = e2->k; e1->info = e2->info;

-      }

-      else {

-        luaK_exp2nextreg(fs, e2);

-        freeexp(fs, e2);

-        freeexp(fs, e1);

-        e1->info = luaK_codeABC(fs, OP_CONCAT, 0, e1->info, e2->info);

-        e1->k = VRELOCABLE;

-      }

-      break;

-    }

-    default: {

-      int o1 = luaK_exp2RK(fs, e1);

-      int o2 = luaK_exp2RK(fs, e2);

-      freeexp(fs, e2);

-      freeexp(fs, e1);

-      codebinop(fs, e1, op, o1, o2);

-    }

-  }

-}

-

-

-void luaK_fixline (FuncState *fs, int line) {

-  fs->f->lineinfo[fs->pc - 1] = line;

-}

-

-

-int luaK_code (FuncState *fs, Instruction i, int line) {

-  Proto *f = fs->f;

-  luaK_dischargejpc(fs);  /* `pc' will change */

-  /* put new instruction in code array */

-  luaM_growvector(fs->L, f->code, fs->pc, f->sizecode, Instruction,

-                  MAX_INT, "code size overflow");

-  f->code[fs->pc] = i;

-  /* save corresponding line information */

-  luaM_growvector(fs->L, f->lineinfo, fs->pc, f->sizelineinfo, int,

-                  MAX_INT, "code size overflow");

-  f->lineinfo[fs->pc] = line;

-  return fs->pc++;

-}

-

-

-int luaK_codeABC (FuncState *fs, OpCode o, int a, int b, int c) {

-  lua_assert(getOpMode(o) == iABC);

-  return luaK_code(fs, CREATE_ABC(o, a, b, c), fs->ls->lastline);

-}

-

-

-int luaK_codeABx (FuncState *fs, OpCode o, int a, unsigned int bc) {

-  lua_assert(getOpMode(o) == iABx || getOpMode(o) == iAsBx);

-  return luaK_code(fs, CREATE_ABx(o, a, bc), fs->ls->lastline);

-}

-

+/*
+** $Id: lcode.c,v 1.4 2004-11-27 21:46:07 pixel Exp $
+** Code generator for Lua
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdlib.h>
+
+#define lcode_c
+
+#include "lua.h"
+
+#include "lcode.h"
+#include "ldebug.h"
+#include "ldo.h"
+#include "llex.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lparser.h"
+#include "ltable.h"
+
+
+#define hasjumps(e)	((e)->t != (e)->f)
+
+
+void luaK_nil (FuncState *fs, int from, int n) {
+  Instruction *previous;
+  if (fs->pc > fs->lasttarget &&  /* no jumps to current position? */
+      GET_OPCODE(*(previous = &fs->f->code[fs->pc-1])) == OP_LOADNIL) {
+    int pfrom = GETARG_A(*previous);
+    int pto = GETARG_B(*previous);
+    if (pfrom <= from && from <= pto+1) {  /* can connect both? */
+      if (from+n-1 > pto)
+        SETARG_B(*previous, from+n-1);
+      return;
+    }
+  }
+  luaK_codeABC(fs, OP_LOADNIL, from, from+n-1, 0);  /* else no optimization */
+}
+
+
+int luaK_jump (FuncState *fs) {
+  int jpc = fs->jpc;  /* save list of jumps to here */
+  int j;
+  fs->jpc = NO_JUMP;
+  j = luaK_codeAsBx(fs, OP_JMP, 0, NO_JUMP);
+  luaK_concat(fs, &j, jpc);  /* keep them on hold */
+  return j;
+}
+
+
+static int luaK_condjump (FuncState *fs, OpCode op, int A, int B, int C) {
+  luaK_codeABC(fs, op, A, B, C);
+  return luaK_jump(fs);
+}
+
+
+static void luaK_fixjump (FuncState *fs, int pc, int dest) {
+  Instruction *jmp = &fs->f->code[pc];
+  int offset = dest-(pc+1);
+  lua_assert(dest != NO_JUMP);
+  if (abs(offset) > MAXARG_sBx)
+    luaX_syntaxerror(fs->ls, "control structure too long");
+  SETARG_sBx(*jmp, offset);
+}
+
+
+/*
+** returns current `pc' and marks it as a jump target (to avoid wrong
+** optimizations with consecutive instructions not in the same basic block).
+*/
+int luaK_getlabel (FuncState *fs) {
+  fs->lasttarget = fs->pc;
+  return fs->pc;
+}
+
+
+static int luaK_getjump (FuncState *fs, int pc) {
+  int offset = GETARG_sBx(fs->f->code[pc]);
+  if (offset == NO_JUMP)  /* point to itself represents end of list */
+    return NO_JUMP;  /* end of list */
+  else
+    return (pc+1)+offset;  /* turn offset into absolute position */
+}
+
+
+static Instruction *getjumpcontrol (FuncState *fs, int pc) {
+  Instruction *pi = &fs->f->code[pc];
+  if (pc >= 1 && testOpMode(GET_OPCODE(*(pi-1)), OpModeT))
+    return pi-1;
+  else
+    return pi;
+}
+
+
+/*
+** check whether list has any jump that do not produce a value
+** (or produce an inverted value)
+*/
+static int need_value (FuncState *fs, int list, int cond) {
+  for (; list != NO_JUMP; list = luaK_getjump(fs, list)) {
+    Instruction i = *getjumpcontrol(fs, list);
+    if (GET_OPCODE(i) != OP_TEST || GETARG_C(i) != cond) return 1;
+  }
+  return 0;  /* not found */
+}
+
+
+static void patchtestreg (Instruction *i, int reg) {
+  if (reg == NO_REG) reg = GETARG_B(*i);
+  SETARG_A(*i, reg);
+}
+
+
+static void luaK_patchlistaux (FuncState *fs, int list,
+          int ttarget, int treg, int ftarget, int freg, int dtarget) {
+  while (list != NO_JUMP) {
+    int next = luaK_getjump(fs, list);
+    Instruction *i = getjumpcontrol(fs, list);
+    if (GET_OPCODE(*i) != OP_TEST) {
+      lua_assert(dtarget != NO_JUMP);
+      luaK_fixjump(fs, list, dtarget);  /* jump to default target */
+    }
+    else {
+      if (GETARG_C(*i)) {
+        lua_assert(ttarget != NO_JUMP);
+        patchtestreg(i, treg);
+        luaK_fixjump(fs, list, ttarget);
+      }
+      else {
+        lua_assert(ftarget != NO_JUMP);
+        patchtestreg(i, freg);
+        luaK_fixjump(fs, list, ftarget);
+      }
+    }
+    list = next;
+  }
+}
+
+
+static void luaK_dischargejpc (FuncState *fs) {
+  luaK_patchlistaux(fs, fs->jpc, fs->pc, NO_REG, fs->pc, NO_REG, fs->pc);
+  fs->jpc = NO_JUMP;
+}
+
+
+void luaK_patchlist (FuncState *fs, int list, int target) {
+  if (target == fs->pc)
+    luaK_patchtohere(fs, list);
+  else {
+    lua_assert(target < fs->pc);
+    luaK_patchlistaux(fs, list, target, NO_REG, target, NO_REG, target);
+  }
+}
+
+
+void luaK_patchtohere (FuncState *fs, int list) {
+  luaK_getlabel(fs);
+  luaK_concat(fs, &fs->jpc, list);
+}
+
+
+void luaK_concat (FuncState *fs, int *l1, int l2) {
+  if (l2 == NO_JUMP) return;
+  else if (*l1 == NO_JUMP)
+    *l1 = l2;
+  else {
+    int list = *l1;
+    int next;
+    while ((next = luaK_getjump(fs, list)) != NO_JUMP)  /* find last element */
+      list = next;
+    luaK_fixjump(fs, list, l2);
+  }
+}
+
+
+void luaK_checkstack (FuncState *fs, int n) {
+  int newstack = fs->freereg + n;
+  if (newstack > fs->f->maxstacksize) {
+    if (newstack >= MAXSTACK)
+      luaX_syntaxerror(fs->ls, "function or expression too complex");
+    fs->f->maxstacksize = cast(lu_byte, newstack);
+  }
+}
+
+
+void luaK_reserveregs (FuncState *fs, int n) {
+  luaK_checkstack(fs, n);
+  fs->freereg += n;
+}
+
+
+static void freereg (FuncState *fs, int reg) {
+  if (reg >= fs->nactvar && reg < MAXSTACK) {
+    fs->freereg--;
+    lua_assert(reg == fs->freereg);
+  }
+}
+
+
+static void freeexp (FuncState *fs, expdesc *e) {
+  if (e->k == VNONRELOC)
+    freereg(fs, e->info);
+}
+
+
+static int addk (FuncState *fs, TObject *k, TObject *v) {
+  const TObject *idx = luaH_get(fs->h, k);
+  if (ttisnumber(idx)) {
+    lua_assert(luaO_rawequalObj(&fs->f->k[cast(int, nvalue(idx))], v));
+    return cast(int, nvalue(idx));
+  }
+  else {  /* constant not found; create a new entry */
+    Proto *f = fs->f;
+    luaM_growvector(fs->L, f->k, fs->nk, f->sizek, TObject,
+                    MAXARG_Bx, "constant table overflow");
+    setobj2n(&f->k[fs->nk], v);
+    setnvalue(luaH_set(fs->L, fs->h, k), cast(lua_Number, fs->nk));
+    return fs->nk++;
+  }
+}
+
+
+int luaK_stringK (FuncState *fs, TString *s) {
+  TObject o;
+  setsvalue(&o, s);
+  return addk(fs, &o, &o);
+}
+
+
+int luaK_numberK (FuncState *fs, lua_Number r) {
+  TObject o;
+  setnvalue(&o, r);
+  return addk(fs, &o, &o);
+}
+
+
+static int nil_constant (FuncState *fs) {
+  TObject k, v;
+  setnilvalue(&v);
+  sethvalue(&k, fs->h);  /* cannot use nil as key; instead use table itself */
+  return addk(fs, &k, &v);
+}
+
+
+void luaK_setcallreturns (FuncState *fs, expdesc *e, int nresults) {
+  if (e->k == VCALL) {  /* expression is an open function call? */
+    SETARG_C(getcode(fs, e), nresults+1);
+    if (nresults == 1) {  /* `regular' expression? */
+      e->k = VNONRELOC;
+      e->info = GETARG_A(getcode(fs, e));
+    }
+  }
+}
+
+
+void luaK_dischargevars (FuncState *fs, expdesc *e) {
+  switch (e->k) {
+    case VLOCAL: {
+      e->k = VNONRELOC;
+      break;
+    }
+    case VUPVAL: {
+      e->info = luaK_codeABC(fs, OP_GETUPVAL, 0, e->info, 0);
+      e->k = VRELOCABLE;
+      break;
+    }
+    case VGLOBAL: {
+      e->info = luaK_codeABx(fs, OP_GETGLOBAL, 0, e->info);
+      e->k = VRELOCABLE;
+      break;
+    }
+    case VINDEXED: {
+      freereg(fs, e->aux);
+      freereg(fs, e->info);
+      e->info = luaK_codeABC(fs, OP_GETTABLE, 0, e->info, e->aux);
+      e->k = VRELOCABLE;
+      break;
+    }
+    case VCALL: {
+      luaK_setcallreturns(fs, e, 1);
+      break;
+    }
+    default: break;  /* there is one value available (somewhere) */
+  }
+}
+
+
+static int code_label (FuncState *fs, int A, int b, int jump) {
+  luaK_getlabel(fs);  /* those instructions may be jump targets */
+  return luaK_codeABC(fs, OP_LOADBOOL, A, b, jump);
+}
+
+
+static void discharge2reg (FuncState *fs, expdesc *e, int reg) {
+  luaK_dischargevars(fs, e);
+  switch (e->k) {
+    case VNIL: {
+      luaK_nil(fs, reg, 1);
+      break;
+    }
+    case VFALSE:  case VTRUE: {
+      luaK_codeABC(fs, OP_LOADBOOL, reg, e->k == VTRUE, 0);
+      break;
+    }
+    case VK: {
+      luaK_codeABx(fs, OP_LOADK, reg, e->info);
+      break;
+    }
+    case VRELOCABLE: {
+      Instruction *pc = &getcode(fs, e);
+      SETARG_A(*pc, reg);
+      break;
+    }
+    case VNONRELOC: {
+      if (reg != e->info)
+        luaK_codeABC(fs, OP_MOVE, reg, e->info, 0);
+      break;
+    }
+    default: {
+      lua_assert(e->k == VVOID || e->k == VJMP);
+      return;  /* nothing to do... */
+    }
+  }
+  e->info = reg;
+  e->k = VNONRELOC;
+}
+
+
+static void discharge2anyreg (FuncState *fs, expdesc *e) {
+  if (e->k != VNONRELOC) {
+    luaK_reserveregs(fs, 1);
+    discharge2reg(fs, e, fs->freereg-1);
+  }
+}
+
+
+static void luaK_exp2reg (FuncState *fs, expdesc *e, int reg) {
+  discharge2reg(fs, e, reg);
+  if (e->k == VJMP)
+    luaK_concat(fs, &e->t, e->info);  /* put this jump in `t' list */
+  if (hasjumps(e)) {
+    int final;  /* position after whole expression */
+    int p_f = NO_JUMP;  /* position of an eventual LOAD false */
+    int p_t = NO_JUMP;  /* position of an eventual LOAD true */
+    if (need_value(fs, e->t, 1) || need_value(fs, e->f, 0)) {
+      int fj = NO_JUMP;  /* first jump (over LOAD ops.) */
+      if (e->k != VJMP)
+        fj = luaK_jump(fs);
+      p_f = code_label(fs, reg, 0, 1);
+      p_t = code_label(fs, reg, 1, 0);
+      luaK_patchtohere(fs, fj);
+    }
+    final = luaK_getlabel(fs);
+    luaK_patchlistaux(fs, e->f, p_f, NO_REG, final, reg, p_f);
+    luaK_patchlistaux(fs, e->t, final, reg, p_t, NO_REG, p_t);
+  }
+  e->f = e->t = NO_JUMP;
+  e->info = reg;
+  e->k = VNONRELOC;
+}
+
+
+void luaK_exp2nextreg (FuncState *fs, expdesc *e) {
+  luaK_dischargevars(fs, e);
+  freeexp(fs, e);
+  luaK_reserveregs(fs, 1);
+  luaK_exp2reg(fs, e, fs->freereg - 1);
+}
+
+
+int luaK_exp2anyreg (FuncState *fs, expdesc *e) {
+  luaK_dischargevars(fs, e);
+  if (e->k == VNONRELOC) {
+    if (!hasjumps(e)) return e->info;  /* exp is already in a register */ 
+    if (e->info >= fs->nactvar) {  /* reg. is not a local? */
+      luaK_exp2reg(fs, e, e->info);  /* put value on it */
+      return e->info;
+    }
+  }
+  luaK_exp2nextreg(fs, e);  /* default */
+  return e->info;
+}
+
+
+void luaK_exp2val (FuncState *fs, expdesc *e) {
+  if (hasjumps(e))
+    luaK_exp2anyreg(fs, e);
+  else
+    luaK_dischargevars(fs, e);
+}
+
+
+int luaK_exp2RK (FuncState *fs, expdesc *e) {
+  luaK_exp2val(fs, e);
+  switch (e->k) {
+    case VNIL: {
+      if (fs->nk + MAXSTACK <= MAXARG_C) {  /* constant fit in argC? */
+        e->info = nil_constant(fs);
+        e->k = VK;
+        return e->info + MAXSTACK;
+      }
+      else break;
+    }
+    case VK: {
+      if (e->info + MAXSTACK <= MAXARG_C)  /* constant fit in argC? */
+        return e->info + MAXSTACK;
+      else break;
+    }
+    default: break;
+  }
+  /* not a constant in the right range: put it in a register */
+  return luaK_exp2anyreg(fs, e);
+}
+
+
+void luaK_storevar (FuncState *fs, expdesc *var, expdesc *exp) {
+  switch (var->k) {
+    case VLOCAL: {
+      freeexp(fs, exp);
+      luaK_exp2reg(fs, exp, var->info);
+      return;
+    }
+    case VUPVAL: {
+      int e = luaK_exp2anyreg(fs, exp);
+      luaK_codeABC(fs, OP_SETUPVAL, e, var->info, 0);
+      break;
+    }
+    case VGLOBAL: {
+      int e = luaK_exp2anyreg(fs, exp);
+      luaK_codeABx(fs, OP_SETGLOBAL, e, var->info);
+      break;
+    }
+    case VINDEXED: {
+      int e = luaK_exp2RK(fs, exp);
+      luaK_codeABC(fs, OP_SETTABLE, var->info, var->aux, e);
+      break;
+    }
+    default: {
+      lua_assert(0);  /* invalid var kind to store */
+      break;
+    }
+  }
+  freeexp(fs, exp);
+}
+
+
+void luaK_self (FuncState *fs, expdesc *e, expdesc *key) {
+  int func;
+  luaK_exp2anyreg(fs, e);
+  freeexp(fs, e);
+  func = fs->freereg;
+  luaK_reserveregs(fs, 2);
+  luaK_codeABC(fs, OP_SELF, func, e->info, luaK_exp2RK(fs, key));
+  freeexp(fs, key);
+  e->info = func;
+  e->k = VNONRELOC;
+}
+
+
+static void invertjump (FuncState *fs, expdesc *e) {
+  Instruction *pc = getjumpcontrol(fs, e->info);
+  lua_assert(testOpMode(GET_OPCODE(*pc), OpModeT) &&
+             GET_OPCODE(*pc) != OP_TEST);
+  SETARG_A(*pc, !(GETARG_A(*pc)));
+}
+
+
+static int jumponcond (FuncState *fs, expdesc *e, int cond) {
+  if (e->k == VRELOCABLE) {
+    Instruction ie = getcode(fs, e);
+    if (GET_OPCODE(ie) == OP_NOT) {
+      fs->pc--;  /* remove previous OP_NOT */
+      return luaK_condjump(fs, OP_TEST, NO_REG, GETARG_B(ie), !cond);
+    }
+    /* else go through */
+  }
+  discharge2anyreg(fs, e);
+  freeexp(fs, e);
+  return luaK_condjump(fs, OP_TEST, NO_REG, e->info, cond);
+}
+
+
+void luaK_goiftrue (FuncState *fs, expdesc *e) {
+  int pc;  /* pc of last jump */
+  luaK_dischargevars(fs, e);
+  switch (e->k) {
+    case VK: case VTRUE: {
+      pc = NO_JUMP;  /* always true; do nothing */
+      break;
+    }
+    case VFALSE: {
+      pc = luaK_jump(fs);  /* always jump */
+      break;
+    }
+    case VJMP: {
+      invertjump(fs, e);
+      pc = e->info;
+      break;
+    }
+    default: {
+      pc = jumponcond(fs, e, 0);
+      break;
+    }
+  }
+  luaK_concat(fs, &e->f, pc);  /* insert last jump in `f' list */
+}
+
+
+void luaK_goiffalse (FuncState *fs, expdesc *e) {
+  int pc;  /* pc of last jump */
+  luaK_dischargevars(fs, e);
+  switch (e->k) {
+    case VNIL: case VFALSE: {
+      pc = NO_JUMP;  /* always false; do nothing */
+      break;
+    }
+    case VTRUE: {
+      pc = luaK_jump(fs);  /* always jump */
+      break;
+    }
+    case VJMP: {
+      pc = e->info;
+      break;
+    }
+    default: {
+      pc = jumponcond(fs, e, 1);
+      break;
+    }
+  }
+  luaK_concat(fs, &e->t, pc);  /* insert last jump in `t' list */
+}
+
+
+static void codenot (FuncState *fs, expdesc *e) {
+  luaK_dischargevars(fs, e);
+  switch (e->k) {
+    case VNIL: case VFALSE: {
+      e->k = VTRUE;
+      break;
+    }
+    case VK: case VTRUE: {
+      e->k = VFALSE;
+      break;
+    }
+    case VJMP: {
+      invertjump(fs, e);
+      break;
+    }
+    case VRELOCABLE:
+    case VNONRELOC: {
+      discharge2anyreg(fs, e);
+      freeexp(fs, e);
+      e->info = luaK_codeABC(fs, OP_NOT, 0, e->info, 0);
+      e->k = VRELOCABLE;
+      break;
+    }
+    default: {
+      lua_assert(0);  /* cannot happen */
+      break;
+    }
+  }
+  /* interchange true and false lists */
+  { int temp = e->f; e->f = e->t; e->t = temp; }
+}
+
+
+void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k) {
+  t->aux = luaK_exp2RK(fs, k);
+  t->k = VINDEXED;
+}
+
+
+void luaK_prefix (FuncState *fs, UnOpr op, expdesc *e) {
+  if (op == OPR_MINUS) {
+    luaK_exp2val(fs, e);
+    if (e->k == VK && ttisnumber(&fs->f->k[e->info]))
+      e->info = luaK_numberK(fs, -nvalue(&fs->f->k[e->info]));
+    else {
+      luaK_exp2anyreg(fs, e);
+      freeexp(fs, e);
+      e->info = luaK_codeABC(fs, OP_UNM, 0, e->info, 0);
+      e->k = VRELOCABLE;
+    }
+  }
+  else  /* op == NOT */
+    codenot(fs, e);
+}
+
+
+void luaK_infix (FuncState *fs, BinOpr op, expdesc *v) {
+  switch (op) {
+    case OPR_AND: {
+      luaK_goiftrue(fs, v);
+      luaK_patchtohere(fs, v->t);
+      v->t = NO_JUMP;
+      break;
+    }
+    case OPR_OR: {
+      luaK_goiffalse(fs, v);
+      luaK_patchtohere(fs, v->f);
+      v->f = NO_JUMP;
+      break;
+    }
+    case OPR_CONCAT: {
+      luaK_exp2nextreg(fs, v);  /* operand must be on the `stack' */
+      break;
+    }
+    default: {
+      luaK_exp2RK(fs, v);
+      break;
+    }
+  }
+}
+
+
+static void codebinop (FuncState *fs, expdesc *res, BinOpr op,
+                       int o1, int o2) {
+  if (op <= OPR_POW) {  /* arithmetic operator? */
+    OpCode opc = cast(OpCode, (op - OPR_ADD) + OP_ADD);  /* ORDER OP */
+    res->info = luaK_codeABC(fs, opc, 0, o1, o2);
+    res->k = VRELOCABLE;
+  }
+  else {  /* test operator */
+    static const OpCode ops[] = {OP_EQ, OP_EQ, OP_LT, OP_LE, OP_LT, OP_LE};
+    int cond = 1;
+    if (op >= OPR_GT) {  /* `>' or `>='? */
+      int temp;  /* exchange args and replace by `<' or `<=' */
+      temp = o1; o1 = o2; o2 = temp;  /* o1 <==> o2 */
+    }
+    else if (op == OPR_NE) cond = 0;
+    res->info = luaK_condjump(fs, ops[op - OPR_NE], cond, o1, o2);
+    res->k = VJMP;
+  }
+}
+
+
+void luaK_posfix (FuncState *fs, BinOpr op, expdesc *e1, expdesc *e2) {
+  switch (op) {
+    case OPR_AND: {
+      lua_assert(e1->t == NO_JUMP);  /* list must be closed */
+      luaK_dischargevars(fs, e2);
+      luaK_concat(fs, &e1->f, e2->f);
+      e1->k = e2->k; e1->info = e2->info; e1->aux = e2->aux; e1->t = e2->t;
+      break;
+    }
+    case OPR_OR: {
+      lua_assert(e1->f == NO_JUMP);  /* list must be closed */
+      luaK_dischargevars(fs, e2);
+      luaK_concat(fs, &e1->t, e2->t);
+      e1->k = e2->k; e1->info = e2->info; e1->aux = e2->aux; e1->f = e2->f;
+      break;
+    }
+    case OPR_CONCAT: {
+      luaK_exp2val(fs, e2);
+      if (e2->k == VRELOCABLE && GET_OPCODE(getcode(fs, e2)) == OP_CONCAT) {
+        lua_assert(e1->info == GETARG_B(getcode(fs, e2))-1);
+        freeexp(fs, e1);
+        SETARG_B(getcode(fs, e2), e1->info);
+        e1->k = e2->k; e1->info = e2->info;
+      }
+      else {
+        luaK_exp2nextreg(fs, e2);
+        freeexp(fs, e2);
+        freeexp(fs, e1);
+        e1->info = luaK_codeABC(fs, OP_CONCAT, 0, e1->info, e2->info);
+        e1->k = VRELOCABLE;
+      }
+      break;
+    }
+    default: {
+      int o1 = luaK_exp2RK(fs, e1);
+      int o2 = luaK_exp2RK(fs, e2);
+      freeexp(fs, e2);
+      freeexp(fs, e1);
+      codebinop(fs, e1, op, o1, o2);
+    }
+  }
+}
+
+
+void luaK_fixline (FuncState *fs, int line) {
+  fs->f->lineinfo[fs->pc - 1] = line;
+}
+
+
+int luaK_code (FuncState *fs, Instruction i, int line) {
+  Proto *f = fs->f;
+  luaK_dischargejpc(fs);  /* `pc' will change */
+  /* put new instruction in code array */
+  luaM_growvector(fs->L, f->code, fs->pc, f->sizecode, Instruction,
+                  MAX_INT, "code size overflow");
+  f->code[fs->pc] = i;
+  /* save corresponding line information */
+  luaM_growvector(fs->L, f->lineinfo, fs->pc, f->sizelineinfo, int,
+                  MAX_INT, "code size overflow");
+  f->lineinfo[fs->pc] = line;
+  return fs->pc++;
+}
+
+
+int luaK_codeABC (FuncState *fs, OpCode o, int a, int b, int c) {
+  lua_assert(getOpMode(o) == iABC);
+  return luaK_code(fs, CREATE_ABC(o, a, b, c), fs->ls->lastline);
+}
+
+
+int luaK_codeABx (FuncState *fs, OpCode o, int a, unsigned int bc) {
+  lua_assert(getOpMode(o) == iABx || getOpMode(o) == iAsBx);
+  return luaK_code(fs, CREATE_ABx(o, a, bc), fs->ls->lastline);
+}
+
diff --git a/lib/lua/src/ldebug.c b/lib/lua/src/ldebug.c
index 0b8e987..65114c7 100644
--- a/lib/lua/src/ldebug.c
+++ b/lib/lua/src/ldebug.c
@@ -1,585 +1,585 @@
-/*

-** $Id: ldebug.c,v 1.3 2004-11-27 21:35:20 pixel Exp $

-** Debug Interface

-** See Copyright Notice in lua.h

-*/

-

-

-#include <stdlib.h>

-#include <string.h>

-

-#define ldebug_c

-

-#include "lua.h"

-

-#include "lapi.h"

-#include "lcode.h"

-#include "ldebug.h"

-#include "ldo.h"

-#include "lfunc.h"

-#include "lobject.h"

-#include "lopcodes.h"

-#include "lstate.h"

-#include "lstring.h"

-#include "ltable.h"

-#include "ltm.h"

-#include "lvm.h"

-

-

-

-static const char *getfuncname (CallInfo *ci, const char **name);

-

-

-#define isLua(ci)	(!((ci)->state & CI_C))

-

-

-static int currentpc (CallInfo *ci) {

-  if (!isLua(ci)) return -1;  /* function is not a Lua function? */

-  if (ci->state & CI_HASFRAME)  /* function has a frame? */

-    ci->u.l.savedpc = *ci->u.l.pc;  /* use `pc' from there */

-  /* function's pc is saved */

-  return pcRel(ci->u.l.savedpc, ci_func(ci)->l.p);

-}

-

-

-static int currentline (CallInfo *ci) {

-  int pc = currentpc(ci);

-  if (pc < 0)

-    return -1;  /* only active lua functions have current-line information */

-  else

-    return getline(ci_func(ci)->l.p, pc);

-}

-

-

-void luaG_inithooks (lua_State *L) {

-  CallInfo *ci;

-  for (ci = L->ci; ci != L->base_ci; ci--)  /* update all `savedpc's */

-    currentpc(ci);

-  L->hookinit = 1;

-}

-

-

-/*

-** this function can be called asynchronous (e.g. during a signal)

-*/

-LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {

-  if (func == NULL || mask == 0) {  /* turn off hooks? */

-    mask = 0;

-    func = NULL;

-  }

-  L->hook = func;

-  L->basehookcount = count;

-  resethookcount(L);

-  L->hookmask = cast(lu_byte, mask);

-  L->hookinit = 0;

-  return 1;

-}

-

-

-LUA_API lua_Hook lua_gethook (lua_State *L) {

-  return L->hook;

-}

-

-

-LUA_API int lua_gethookmask (lua_State *L) {

-  return L->hookmask;

-}

-

-

-LUA_API int lua_gethookcount (lua_State *L) {

-  return L->basehookcount;

-}

-

-

-LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {

-  int status;

-  CallInfo *ci;

-  lua_lock(L);

-  for (ci = L->ci; level > 0 && ci > L->base_ci; ci--) {

-    level--;

-    if (!(ci->state & CI_C))  /* Lua function? */

-      level -= ci->u.l.tailcalls;  /* skip lost tail calls */

-  }

-  if (level > 0 || ci == L->base_ci) status = 0;  /* there is no such level */

-  else if (level < 0) {  /* level is of a lost tail call */

-    status = 1;

-    ar->i_ci = 0;

-  }

-  else {

-    status = 1;

-    ar->i_ci = ci - L->base_ci;

-  }

-  lua_unlock(L);

-  return status;

-}

-

-

-static Proto *getluaproto (CallInfo *ci) {

-  return (isLua(ci) ? ci_func(ci)->l.p : NULL);

-}

-

-

-LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {

-  const char *name;

-  CallInfo *ci;

-  Proto *fp;

-  lua_lock(L);

-  name = NULL;

-  ci = L->base_ci + ar->i_ci;

-  fp = getluaproto(ci);

-  if (fp) {  /* is a Lua function? */

-    name = luaF_getlocalname(fp, n, currentpc(ci));

-    if (name)

-      luaA_pushobject(L, ci->base+(n-1));  /* push value */

-  }

-  lua_unlock(L);

-  return name;

-}

-

-

-LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {

-  const char *name;

-  CallInfo *ci;

-  Proto *fp;

-  lua_lock(L);

-  name = NULL;

-  ci = L->base_ci + ar->i_ci;

-  fp = getluaproto(ci);

-  L->top--;  /* pop new value */

-  if (fp) {  /* is a Lua function? */

-    name = luaF_getlocalname(fp, n, currentpc(ci));

-    if (!name || name[0] == '(')  /* `(' starts private locals */

-      name = NULL;

-    else

-      setobjs2s(ci->base+(n-1), L->top);

-  }

-  lua_unlock(L);

-  return name;

-}

-

-

-static void funcinfo (lua_Debug *ar, StkId func) {

-  Closure *cl = clvalue(func);

-  if (cl->c.isC) {

-    ar->source = "=[C]";

-    ar->linedefined = -1;

-    ar->what = "C";

-  }

-  else {

-    ar->source = getstr(cl->l.p->source);

-    ar->linedefined = cl->l.p->lineDefined;

-    ar->what = (ar->linedefined == 0) ? "main" : "Lua";

-  }

-  luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);

-}

-

-

-static const char *travglobals (lua_State *L, const TObject *o) {

-  Table *g = hvalue(gt(L));

-  int i = sizenode(g);

-  while (i--) {

-    Node *n = gnode(g, i);

-    if (luaO_rawequalObj(o, gval(n)) && ttisstring(gkey(n)))

-      return getstr(tsvalue(gkey(n)));

-  }

-  return NULL;

-}

-

-

-static void info_tailcall (lua_State *L, lua_Debug *ar) {

-  ar->name = ar->namewhat = "";

-  ar->what = "tail";

-  ar->linedefined = ar->currentline = -1;

-  ar->source = "=(tail call)";

-  luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);

-  ar->nups = 0;

-  setnilvalue(L->top);

-}

-

-

-static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,

-                    StkId f, CallInfo *ci) {

-  int status = 1;

-  for (; *what; what++) {

-    switch (*what) {

-      case 'S': {

-        funcinfo(ar, f);

-        break;

-      }

-      case 'l': {

-        ar->currentline = (ci) ? currentline(ci) : -1;

-        break;

-      }

-      case 'u': {

-        ar->nups = clvalue(f)->c.nupvalues;

-        break;

-      }

-      case 'n': {

-        ar->namewhat = (ci) ? getfuncname(ci, &ar->name) : NULL;

-        if (ar->namewhat == NULL) {

-          /* try to find a global name */

-          if ((ar->name = travglobals(L, f)) != NULL)

-            ar->namewhat = "global";

-          else ar->namewhat = "";  /* not found */

-        }

-        break;

-      }

-      case 'f': {

-        setobj2s(L->top, f);

-        break;

-      }

-      default: status = 0;  /* invalid option */

-    }

-  }

-  return status;

-}

-

-

-LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {

-  int status = 1;

-  lua_lock(L);

-  if (*what == '>') {

-    StkId f = L->top - 1;

-    if (!ttisfunction(f))

-      luaG_runerror(L, "value for `lua_getinfo' is not a function");

-    status = auxgetinfo(L, what + 1, ar, f, NULL);

-    L->top--;  /* pop function */

-  }

-  else if (ar->i_ci != 0) {  /* no tail call? */

-    CallInfo *ci = L->base_ci + ar->i_ci;

-    lua_assert(ttisfunction(ci->base - 1));

-    status = auxgetinfo(L, what, ar, ci->base - 1, ci);

-  }

-  else

-    info_tailcall(L, ar);

-  if (strchr(what, 'f')) incr_top(L);

-  lua_unlock(L);

-  return status;

-}

-

-

-/*

-** {======================================================

-** Symbolic Execution and code checker

-** =======================================================

-*/

-

-#define check(x)		if (!(x)) return 0;

-

-#define checkjump(pt,pc)	check(0 <= pc && pc < pt->sizecode)

-

-#define checkreg(pt,reg)	check((reg) < (pt)->maxstacksize)

-

-

-

-static int precheck (const Proto *pt) {

-  check(pt->maxstacksize <= MAXSTACK);

-  check(pt->sizelineinfo == pt->sizecode || pt->sizelineinfo == 0);

-  lua_assert(pt->numparams+pt->is_vararg <= pt->maxstacksize);

-  check(GET_OPCODE(pt->code[pt->sizecode-1]) == OP_RETURN);

-  return 1;

-}

-

-

-static int checkopenop (const Proto *pt, int pc) {

-  Instruction i = pt->code[pc+1];

-  switch (GET_OPCODE(i)) {

-    case OP_CALL:

-    case OP_TAILCALL:

-    case OP_RETURN: {

-      check(GETARG_B(i) == 0);

-      return 1;

-    }

-    case OP_SETLISTO: return 1;

-    default: return 0;  /* invalid instruction after an open call */

-  }

-}

-

-

-static int checkRK (const Proto *pt, int r) {

-  return (r < pt->maxstacksize || (r >= MAXSTACK && r-MAXSTACK < pt->sizek));

-}

-

-

-static Instruction luaG_symbexec (const Proto *pt, int lastpc, int reg) {

-  int pc;

-  int last;  /* stores position of last instruction that changed `reg' */

-  last = pt->sizecode-1;  /* points to final return (a `neutral' instruction) */

-  check(precheck(pt));

-  for (pc = 0; pc < lastpc; pc++) {

-    const Instruction i = pt->code[pc];

-    OpCode op = GET_OPCODE(i);

-    int a = GETARG_A(i);

-    int b = 0;

-    int c = 0;

-    checkreg(pt, a);

-    switch (getOpMode(op)) {

-      case iABC: {

-        b = GETARG_B(i);

-        c = GETARG_C(i);

-        if (testOpMode(op, OpModeBreg)) {

-          checkreg(pt, b);

-        }

-        else if (testOpMode(op, OpModeBrk))

-          check(checkRK(pt, b));

-        if (testOpMode(op, OpModeCrk))

-          check(checkRK(pt, c));

-        break;

-      }

-      case iABx: {

-        b = GETARG_Bx(i);

-        if (testOpMode(op, OpModeK)) check(b < pt->sizek);

-        break;

-      }

-      case iAsBx: {

-        b = GETARG_sBx(i);

-        break;

-      }

-    }

-    if (testOpMode(op, OpModesetA)) {

-      if (a == reg) last = pc;  /* change register `a' */

-    }

-    if (testOpMode(op, OpModeT)) {

-      check(pc+2 < pt->sizecode);  /* check skip */

-      check(GET_OPCODE(pt->code[pc+1]) == OP_JMP);

-    }

-    switch (op) {

-      case OP_LOADBOOL: {

-        check(c == 0 || pc+2 < pt->sizecode);  /* check its jump */

-        break;

-      }

-      case OP_LOADNIL: {

-        if (a <= reg && reg <= b)

-          last = pc;  /* set registers from `a' to `b' */

-        break;

-      }

-      case OP_GETUPVAL:

-      case OP_SETUPVAL: {

-        check(b < pt->nups);

-        break;

-      }

-      case OP_GETGLOBAL:

-      case OP_SETGLOBAL: {

-        check(ttisstring(&pt->k[b]));

-        break;

-      }

-      case OP_SELF: {

-        checkreg(pt, a+1);

-        if (reg == a+1) last = pc;

-        break;

-      }

-      case OP_CONCAT: {

-        /* `c' is a register, and at least two operands */

-        check(c < MAXSTACK && b < c);

-        break;

-      }

-      case OP_TFORLOOP:

-        checkreg(pt, a+c+5);

-        if (reg >= a) last = pc;  /* affect all registers above base */

-        /* go through */

-      case OP_FORLOOP:

-        checkreg(pt, a+2);

-        /* go through */

-      case OP_JMP: {

-        int dest = pc+1+b;

-	check(0 <= dest && dest < pt->sizecode);

-        /* not full check and jump is forward and do not skip `lastpc'? */

-        if (reg != NO_REG && pc < dest && dest <= lastpc)

-          pc += b;  /* do the jump */

-        break;

-      }

-      case OP_CALL:

-      case OP_TAILCALL: {

-        if (b != 0) {

-          checkreg(pt, a+b-1);

-        }

-        c--;  /* c = num. returns */

-        if (c == LUA_MULTRET) {

-          check(checkopenop(pt, pc));

-        }

-        else if (c != 0)

-          checkreg(pt, a+c-1);

-        if (reg >= a) last = pc;  /* affect all registers above base */

-        break;

-      }

-      case OP_RETURN: {

-        b--;  /* b = num. returns */

-        if (b > 0) checkreg(pt, a+b-1);

-        break;

-      }

-      case OP_SETLIST: {

-        checkreg(pt, a + (b&(LFIELDS_PER_FLUSH-1)) + 1);

-        break;

-      }

-      case OP_CLOSURE: {

-        int nup;

-        check(b < pt->sizep);

-        nup = pt->p[b]->nups;

-        check(pc + nup < pt->sizecode);

-        for (; nup>0; nup--) {

-          OpCode op1 = GET_OPCODE(pt->code[pc+nup]);

-          check(op1 == OP_GETUPVAL || op1 == OP_MOVE);

-        }

-        break;

-      }

-      default: break;

-    }

-  }

-  return pt->code[last];

-}

-

-#undef check

-#undef checkjump

-#undef checkreg

-

-/* }====================================================== */

-

-

-int luaG_checkcode (const Proto *pt) {

-  return luaG_symbexec(pt, pt->sizecode, NO_REG);

-}

-

-

-static const char *kname (Proto *p, int c) {

-  c = c - MAXSTACK;

-  if (c >= 0 && ttisstring(&p->k[c]))

-    return svalue(&p->k[c]);

-  else

-    return "?";

-}

-

-

-static const char *getobjname (CallInfo *ci, int stackpos, const char **name) {

-  if (isLua(ci)) {  /* a Lua function? */

-    Proto *p = ci_func(ci)->l.p;

-    int pc = currentpc(ci);

-    Instruction i;

-    *name = luaF_getlocalname(p, stackpos+1, pc);

-    if (*name)  /* is a local? */

-      return "local";

-    i = luaG_symbexec(p, pc, stackpos);  /* try symbolic execution */

-    lua_assert(pc != -1);

-    switch (GET_OPCODE(i)) {

-      case OP_GETGLOBAL: {

-        int g = GETARG_Bx(i);  /* global index */

-        lua_assert(ttisstring(&p->k[g]));

-        *name = svalue(&p->k[g]);

-        return "global";

-      }

-      case OP_MOVE: {

-        int a = GETARG_A(i);

-        int b = GETARG_B(i);  /* move from `b' to `a' */

-        if (b < a)

-          return getobjname(ci, b, name);  /* get name for `b' */

-        break;

-      }

-      case OP_GETTABLE: {

-        int k = GETARG_C(i);  /* key index */

-        *name = kname(p, k);

-        return "field";

-      }

-      case OP_SELF: {

-        int k = GETARG_C(i);  /* key index */

-        *name = kname(p, k);

-        return "method";

-      }

-      default: break;

-    }

-  }

-  return NULL;  /* no useful name found */

-}

-

-

-static const char *getfuncname (CallInfo *ci, const char **name) {

-  Instruction i;

-  if ((isLua(ci) && ci->u.l.tailcalls > 0) || !isLua(ci - 1))

-    return NULL;  /* calling function is not Lua (or is unknown) */

-  ci--;  /* calling function */

-  i = ci_func(ci)->l.p->code[currentpc(ci)];

-  if (GET_OPCODE(i) == OP_CALL || GET_OPCODE(i) == OP_TAILCALL)

-    return getobjname(ci, GETARG_A(i), name);

-  else

-    return NULL;  /* no useful name can be found */

-}

-

-

-/* only ANSI way to check whether a pointer points to an array */

-static int isinstack (CallInfo *ci, const TObject *o) {

-  StkId p;

-  for (p = ci->base; p < ci->top; p++)

-    if (o == p) return 1;

-  return 0;

-}

-

-

-void luaG_typeerror (lua_State *L, const TObject *o, const char *op) {

-  const char *name = NULL;

-  const char *t = luaT_typenames[ttype(o)];

-  const char *kind = (isinstack(L->ci, o)) ?

-                         getobjname(L->ci, o - L->base, &name) : NULL;

-  if (kind)

-    luaG_runerror(L, "attempt to %s %s `%s' (a %s value)",

-                op, kind, name, t);

-  else

-    luaG_runerror(L, "attempt to %s a %s value", op, t);

-}

-

-

-void luaG_concaterror (lua_State *L, StkId p1, StkId p2) {

-  if (ttisstring(p1)) p1 = p2;

-  lua_assert(!ttisstring(p1));

-  luaG_typeerror(L, p1, "concatenate");

-}

-

-

-void luaG_aritherror (lua_State *L, const TObject *p1, const TObject *p2) {

-  TObject temp;

-  if (luaV_tonumber(p1, &temp) == NULL)

-    p2 = p1;  /* first operand is wrong */

-  luaG_typeerror(L, p2, "perform arithmetic on");

-}

-

-

-int luaG_ordererror (lua_State *L, const TObject *p1, const TObject *p2) {

-  const char *t1 = luaT_typenames[ttype(p1)];

-  const char *t2 = luaT_typenames[ttype(p2)];

-  if (t1[2] == t2[2])

-    luaG_runerror(L, "attempt to compare two %s values", t1);

-  else

-    luaG_runerror(L, "attempt to compare %s with %s", t1, t2);

-  return 0;

-}

-

-

-static void addinfo (lua_State *L, const char *msg) {

-  CallInfo *ci = L->ci;

-  if (isLua(ci)) {  /* is Lua code? */

-    char buff[LUA_IDSIZE];  /* add file:line information */

-    int line = currentline(ci);

-    luaO_chunkid(buff, getstr(getluaproto(ci)->source), LUA_IDSIZE);

-    luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);

-  }

-}

-

-

-void luaG_errormsg (lua_State *L) {

-  if (L->errfunc != 0) {  /* is there an error handling function? */

-    StkId errfunc = restorestack(L, L->errfunc);

-    if (!ttisfunction(errfunc)) luaD_throw(L, LUA_ERRERR);

-    setobjs2s(L->top, L->top - 1);  /* move argument */

-    setobjs2s(L->top - 1, errfunc);  /* push function */

-    incr_top(L);

-    luaD_call(L, L->top - 2, 1);  /* call it */

-  }

-  luaD_throw(L, LUA_ERRRUN);

-}

-

-

-void luaG_runerror (lua_State *L, const char *fmt, ...) {

-  va_list argp;

-  va_start(argp, fmt);

-  addinfo(L, luaO_pushvfstring(L, fmt, argp));

-  va_end(argp);

-  luaG_errormsg(L);

-}

-

+/*
+** $Id: ldebug.c,v 1.4 2004-11-27 21:46:07 pixel Exp $
+** Debug Interface
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdlib.h>
+#include <string.h>
+
+#define ldebug_c
+
+#include "lua.h"
+
+#include "lapi.h"
+#include "lcode.h"
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+#include "lvm.h"
+
+
+
+static const char *getfuncname (CallInfo *ci, const char **name);
+
+
+#define isLua(ci)	(!((ci)->state & CI_C))
+
+
+static int currentpc (CallInfo *ci) {
+  if (!isLua(ci)) return -1;  /* function is not a Lua function? */
+  if (ci->state & CI_HASFRAME)  /* function has a frame? */
+    ci->u.l.savedpc = *ci->u.l.pc;  /* use `pc' from there */
+  /* function's pc is saved */
+  return pcRel(ci->u.l.savedpc, ci_func(ci)->l.p);
+}
+
+
+static int currentline (CallInfo *ci) {
+  int pc = currentpc(ci);
+  if (pc < 0)
+    return -1;  /* only active lua functions have current-line information */
+  else
+    return getline(ci_func(ci)->l.p, pc);
+}
+
+
+void luaG_inithooks (lua_State *L) {
+  CallInfo *ci;
+  for (ci = L->ci; ci != L->base_ci; ci--)  /* update all `savedpc's */
+    currentpc(ci);
+  L->hookinit = 1;
+}
+
+
+/*
+** this function can be called asynchronous (e.g. during a signal)
+*/
+LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
+  if (func == NULL || mask == 0) {  /* turn off hooks? */
+    mask = 0;
+    func = NULL;
+  }
+  L->hook = func;
+  L->basehookcount = count;
+  resethookcount(L);
+  L->hookmask = cast(lu_byte, mask);
+  L->hookinit = 0;
+  return 1;
+}
+
+
+LUA_API lua_Hook lua_gethook (lua_State *L) {
+  return L->hook;
+}
+
+
+LUA_API int lua_gethookmask (lua_State *L) {
+  return L->hookmask;
+}
+
+
+LUA_API int lua_gethookcount (lua_State *L) {
+  return L->basehookcount;
+}
+
+
+LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
+  int status;
+  CallInfo *ci;
+  lua_lock(L);
+  for (ci = L->ci; level > 0 && ci > L->base_ci; ci--) {
+    level--;
+    if (!(ci->state & CI_C))  /* Lua function? */
+      level -= ci->u.l.tailcalls;  /* skip lost tail calls */
+  }
+  if (level > 0 || ci == L->base_ci) status = 0;  /* there is no such level */
+  else if (level < 0) {  /* level is of a lost tail call */
+    status = 1;
+    ar->i_ci = 0;
+  }
+  else {
+    status = 1;
+    ar->i_ci = ci - L->base_ci;
+  }
+  lua_unlock(L);
+  return status;
+}
+
+
+static Proto *getluaproto (CallInfo *ci) {
+  return (isLua(ci) ? ci_func(ci)->l.p : NULL);
+}
+
+
+LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
+  const char *name;
+  CallInfo *ci;
+  Proto *fp;
+  lua_lock(L);
+  name = NULL;
+  ci = L->base_ci + ar->i_ci;
+  fp = getluaproto(ci);
+  if (fp) {  /* is a Lua function? */
+    name = luaF_getlocalname(fp, n, currentpc(ci));
+    if (name)
+      luaA_pushobject(L, ci->base+(n-1));  /* push value */
+  }
+  lua_unlock(L);
+  return name;
+}
+
+
+LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
+  const char *name;
+  CallInfo *ci;
+  Proto *fp;
+  lua_lock(L);
+  name = NULL;
+  ci = L->base_ci + ar->i_ci;
+  fp = getluaproto(ci);
+  L->top--;  /* pop new value */
+  if (fp) {  /* is a Lua function? */
+    name = luaF_getlocalname(fp, n, currentpc(ci));
+    if (!name || name[0] == '(')  /* `(' starts private locals */
+      name = NULL;
+    else
+      setobjs2s(ci->base+(n-1), L->top);
+  }
+  lua_unlock(L);
+  return name;
+}
+
+
+static void funcinfo (lua_Debug *ar, StkId func) {
+  Closure *cl = clvalue(func);
+  if (cl->c.isC) {
+    ar->source = "=[C]";
+    ar->linedefined = -1;
+    ar->what = "C";
+  }
+  else {
+    ar->source = getstr(cl->l.p->source);
+    ar->linedefined = cl->l.p->lineDefined;
+    ar->what = (ar->linedefined == 0) ? "main" : "Lua";
+  }
+  luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
+}
+
+
+static const char *travglobals (lua_State *L, const TObject *o) {
+  Table *g = hvalue(gt(L));
+  int i = sizenode(g);
+  while (i--) {
+    Node *n = gnode(g, i);
+    if (luaO_rawequalObj(o, gval(n)) && ttisstring(gkey(n)))
+      return getstr(tsvalue(gkey(n)));
+  }
+  return NULL;
+}
+
+
+static void info_tailcall (lua_State *L, lua_Debug *ar) {
+  ar->name = ar->namewhat = "";
+  ar->what = "tail";
+  ar->linedefined = ar->currentline = -1;
+  ar->source = "=(tail call)";
+  luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
+  ar->nups = 0;
+  setnilvalue(L->top);
+}
+
+
+static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
+                    StkId f, CallInfo *ci) {
+  int status = 1;
+  for (; *what; what++) {
+    switch (*what) {
+      case 'S': {
+        funcinfo(ar, f);
+        break;
+      }
+      case 'l': {
+        ar->currentline = (ci) ? currentline(ci) : -1;
+        break;
+      }
+      case 'u': {
+        ar->nups = clvalue(f)->c.nupvalues;
+        break;
+      }
+      case 'n': {
+        ar->namewhat = (ci) ? getfuncname(ci, &ar->name) : NULL;
+        if (ar->namewhat == NULL) {
+          /* try to find a global name */
+          if ((ar->name = travglobals(L, f)) != NULL)
+            ar->namewhat = "global";
+          else ar->namewhat = "";  /* not found */
+        }
+        break;
+      }
+      case 'f': {
+        setobj2s(L->top, f);
+        break;
+      }
+      default: status = 0;  /* invalid option */
+    }
+  }
+  return status;
+}
+
+
+LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
+  int status = 1;
+  lua_lock(L);
+  if (*what == '>') {
+    StkId f = L->top - 1;
+    if (!ttisfunction(f))
+      luaG_runerror(L, "value for `lua_getinfo' is not a function");
+    status = auxgetinfo(L, what + 1, ar, f, NULL);
+    L->top--;  /* pop function */
+  }
+  else if (ar->i_ci != 0) {  /* no tail call? */
+    CallInfo *ci = L->base_ci + ar->i_ci;
+    lua_assert(ttisfunction(ci->base - 1));
+    status = auxgetinfo(L, what, ar, ci->base - 1, ci);
+  }
+  else
+    info_tailcall(L, ar);
+  if (strchr(what, 'f')) incr_top(L);
+  lua_unlock(L);
+  return status;
+}
+
+
+/*
+** {======================================================
+** Symbolic Execution and code checker
+** =======================================================
+*/
+
+#define check(x)		if (!(x)) return 0;
+
+#define checkjump(pt,pc)	check(0 <= pc && pc < pt->sizecode)
+
+#define checkreg(pt,reg)	check((reg) < (pt)->maxstacksize)
+
+
+
+static int precheck (const Proto *pt) {
+  check(pt->maxstacksize <= MAXSTACK);
+  check(pt->sizelineinfo == pt->sizecode || pt->sizelineinfo == 0);
+  lua_assert(pt->numparams+pt->is_vararg <= pt->maxstacksize);
+  check(GET_OPCODE(pt->code[pt->sizecode-1]) == OP_RETURN);
+  return 1;
+}
+
+
+static int checkopenop (const Proto *pt, int pc) {
+  Instruction i = pt->code[pc+1];
+  switch (GET_OPCODE(i)) {
+    case OP_CALL:
+    case OP_TAILCALL:
+    case OP_RETURN: {
+      check(GETARG_B(i) == 0);
+      return 1;
+    }
+    case OP_SETLISTO: return 1;
+    default: return 0;  /* invalid instruction after an open call */
+  }
+}
+
+
+static int checkRK (const Proto *pt, int r) {
+  return (r < pt->maxstacksize || (r >= MAXSTACK && r-MAXSTACK < pt->sizek));
+}
+
+
+static Instruction luaG_symbexec (const Proto *pt, int lastpc, int reg) {
+  int pc;
+  int last;  /* stores position of last instruction that changed `reg' */
+  last = pt->sizecode-1;  /* points to final return (a `neutral' instruction) */
+  check(precheck(pt));
+  for (pc = 0; pc < lastpc; pc++) {
+    const Instruction i = pt->code[pc];
+    OpCode op = GET_OPCODE(i);
+    int a = GETARG_A(i);
+    int b = 0;
+    int c = 0;
+    checkreg(pt, a);
+    switch (getOpMode(op)) {
+      case iABC: {
+        b = GETARG_B(i);
+        c = GETARG_C(i);
+        if (testOpMode(op, OpModeBreg)) {
+          checkreg(pt, b);
+        }
+        else if (testOpMode(op, OpModeBrk))
+          check(checkRK(pt, b));
+        if (testOpMode(op, OpModeCrk))
+          check(checkRK(pt, c));
+        break;
+      }
+      case iABx: {
+        b = GETARG_Bx(i);
+        if (testOpMode(op, OpModeK)) check(b < pt->sizek);
+        break;
+      }
+      case iAsBx: {
+        b = GETARG_sBx(i);
+        break;
+      }
+    }
+    if (testOpMode(op, OpModesetA)) {
+      if (a == reg) last = pc;  /* change register `a' */
+    }
+    if (testOpMode(op, OpModeT)) {
+      check(pc+2 < pt->sizecode);  /* check skip */
+      check(GET_OPCODE(pt->code[pc+1]) == OP_JMP);
+    }
+    switch (op) {
+      case OP_LOADBOOL: {
+        check(c == 0 || pc+2 < pt->sizecode);  /* check its jump */
+        break;
+      }
+      case OP_LOADNIL: {
+        if (a <= reg && reg <= b)
+          last = pc;  /* set registers from `a' to `b' */
+        break;
+      }
+      case OP_GETUPVAL:
+      case OP_SETUPVAL: {
+        check(b < pt->nups);
+        break;
+      }
+      case OP_GETGLOBAL:
+      case OP_SETGLOBAL: {
+        check(ttisstring(&pt->k[b]));
+        break;
+      }
+      case OP_SELF: {
+        checkreg(pt, a+1);
+        if (reg == a+1) last = pc;
+        break;
+      }
+      case OP_CONCAT: {
+        /* `c' is a register, and at least two operands */
+        check(c < MAXSTACK && b < c);
+        break;
+      }
+      case OP_TFORLOOP:
+        checkreg(pt, a+c+5);
+        if (reg >= a) last = pc;  /* affect all registers above base */
+        /* go through */
+      case OP_FORLOOP:
+        checkreg(pt, a+2);
+        /* go through */
+      case OP_JMP: {
+        int dest = pc+1+b;
+	check(0 <= dest && dest < pt->sizecode);
+        /* not full check and jump is forward and do not skip `lastpc'? */
+        if (reg != NO_REG && pc < dest && dest <= lastpc)
+          pc += b;  /* do the jump */
+        break;
+      }
+      case OP_CALL:
+      case OP_TAILCALL: {
+        if (b != 0) {
+          checkreg(pt, a+b-1);
+        }
+        c--;  /* c = num. returns */
+        if (c == LUA_MULTRET) {
+          check(checkopenop(pt, pc));
+        }
+        else if (c != 0)
+          checkreg(pt, a+c-1);
+        if (reg >= a) last = pc;  /* affect all registers above base */
+        break;
+      }
+      case OP_RETURN: {
+        b--;  /* b = num. returns */
+        if (b > 0) checkreg(pt, a+b-1);
+        break;
+      }
+      case OP_SETLIST: {
+        checkreg(pt, a + (b&(LFIELDS_PER_FLUSH-1)) + 1);
+        break;
+      }
+      case OP_CLOSURE: {
+        int nup;
+        check(b < pt->sizep);
+        nup = pt->p[b]->nups;
+        check(pc + nup < pt->sizecode);
+        for (; nup>0; nup--) {
+          OpCode op1 = GET_OPCODE(pt->code[pc+nup]);
+          check(op1 == OP_GETUPVAL || op1 == OP_MOVE);
+        }
+        break;
+      }
+      default: break;
+    }
+  }
+  return pt->code[last];
+}
+
+#undef check
+#undef checkjump
+#undef checkreg
+
+/* }====================================================== */
+
+
+int luaG_checkcode (const Proto *pt) {
+  return luaG_symbexec(pt, pt->sizecode, NO_REG);
+}
+
+
+static const char *kname (Proto *p, int c) {
+  c = c - MAXSTACK;
+  if (c >= 0 && ttisstring(&p->k[c]))
+    return svalue(&p->k[c]);
+  else
+    return "?";
+}
+
+
+static const char *getobjname (CallInfo *ci, int stackpos, const char **name) {
+  if (isLua(ci)) {  /* a Lua function? */
+    Proto *p = ci_func(ci)->l.p;
+    int pc = currentpc(ci);
+    Instruction i;
+    *name = luaF_getlocalname(p, stackpos+1, pc);
+    if (*name)  /* is a local? */
+      return "local";
+    i = luaG_symbexec(p, pc, stackpos);  /* try symbolic execution */
+    lua_assert(pc != -1);
+    switch (GET_OPCODE(i)) {
+      case OP_GETGLOBAL: {
+        int g = GETARG_Bx(i);  /* global index */
+        lua_assert(ttisstring(&p->k[g]));
+        *name = svalue(&p->k[g]);
+        return "global";
+      }
+      case OP_MOVE: {
+        int a = GETARG_A(i);
+        int b = GETARG_B(i);  /* move from `b' to `a' */
+        if (b < a)
+          return getobjname(ci, b, name);  /* get name for `b' */
+        break;
+      }
+      case OP_GETTABLE: {
+        int k = GETARG_C(i);  /* key index */
+        *name = kname(p, k);
+        return "field";
+      }
+      case OP_SELF: {
+        int k = GETARG_C(i);  /* key index */
+        *name = kname(p, k);
+        return "method";
+      }
+      default: break;
+    }
+  }
+  return NULL;  /* no useful name found */
+}
+
+
+static const char *getfuncname (CallInfo *ci, const char **name) {
+  Instruction i;
+  if ((isLua(ci) && ci->u.l.tailcalls > 0) || !isLua(ci - 1))
+    return NULL;  /* calling function is not Lua (or is unknown) */
+  ci--;  /* calling function */
+  i = ci_func(ci)->l.p->code[currentpc(ci)];
+  if (GET_OPCODE(i) == OP_CALL || GET_OPCODE(i) == OP_TAILCALL)
+    return getobjname(ci, GETARG_A(i), name);
+  else
+    return NULL;  /* no useful name can be found */
+}
+
+
+/* only ANSI way to check whether a pointer points to an array */
+static int isinstack (CallInfo *ci, const TObject *o) {
+  StkId p;
+  for (p = ci->base; p < ci->top; p++)
+    if (o == p) return 1;
+  return 0;
+}
+
+
+void luaG_typeerror (lua_State *L, const TObject *o, const char *op) {
+  const char *name = NULL;
+  const char *t = luaT_typenames[ttype(o)];
+  const char *kind = (isinstack(L->ci, o)) ?
+                         getobjname(L->ci, o - L->base, &name) : NULL;
+  if (kind)
+    luaG_runerror(L, "attempt to %s %s `%s' (a %s value)",
+                op, kind, name, t);
+  else
+    luaG_runerror(L, "attempt to %s a %s value", op, t);
+}
+
+
+void luaG_concaterror (lua_State *L, StkId p1, StkId p2) {
+  if (ttisstring(p1)) p1 = p2;
+  lua_assert(!ttisstring(p1));
+  luaG_typeerror(L, p1, "concatenate");
+}
+
+
+void luaG_aritherror (lua_State *L, const TObject *p1, const TObject *p2) {
+  TObject temp;
+  if (luaV_tonumber(p1, &temp) == NULL)
+    p2 = p1;  /* first operand is wrong */
+  luaG_typeerror(L, p2, "perform arithmetic on");
+}
+
+
+int luaG_ordererror (lua_State *L, const TObject *p1, const TObject *p2) {
+  const char *t1 = luaT_typenames[ttype(p1)];
+  const char *t2 = luaT_typenames[ttype(p2)];
+  if (t1[2] == t2[2])
+    luaG_runerror(L, "attempt to compare two %s values", t1);
+  else
+    luaG_runerror(L, "attempt to compare %s with %s", t1, t2);
+  return 0;
+}
+
+
+static void addinfo (lua_State *L, const char *msg) {
+  CallInfo *ci = L->ci;
+  if (isLua(ci)) {  /* is Lua code? */
+    char buff[LUA_IDSIZE];  /* add file:line information */
+    int line = currentline(ci);
+    luaO_chunkid(buff, getstr(getluaproto(ci)->source), LUA_IDSIZE);
+    luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
+  }
+}
+
+
+void luaG_errormsg (lua_State *L) {
+  if (L->errfunc != 0) {  /* is there an error handling function? */
+    StkId errfunc = restorestack(L, L->errfunc);
+    if (!ttisfunction(errfunc)) luaD_throw(L, LUA_ERRERR);
+    setobjs2s(L->top, L->top - 1);  /* move argument */
+    setobjs2s(L->top - 1, errfunc);  /* push function */
+    incr_top(L);
+    luaD_call(L, L->top - 2, 1);  /* call it */
+  }
+  luaD_throw(L, LUA_ERRRUN);
+}
+
+
+void luaG_runerror (lua_State *L, const char *fmt, ...) {
+  va_list argp;
+  va_start(argp, fmt);
+  addinfo(L, luaO_pushvfstring(L, fmt, argp));
+  va_end(argp);
+  luaG_errormsg(L);
+}
+
diff --git a/lib/lua/src/ldo.c b/lib/lua/src/ldo.c
index 8c64852..aa4cf70 100644
--- a/lib/lua/src/ldo.c
+++ b/lib/lua/src/ldo.c
@@ -1,465 +1,465 @@
-/*

-** $Id: ldo.c,v 1.4 2004-11-27 21:35:20 pixel Exp $

-** Stack and Call structure of Lua

-** See Copyright Notice in lua.h

-*/

-

-

-#include <setjmp.h>

-#include <stdlib.h>

-#include <string.h>

-

-#define ldo_c

-

-#include "lua.h"

-

-#include "ldebug.h"

-#include "ldo.h"

-#include "lfunc.h"

-#include "lgc.h"

-#include "lmem.h"

-#include "lobject.h"

-#include "lopcodes.h"

-#include "lparser.h"

-#include "lstate.h"

-#include "lstring.h"

-#include "ltable.h"

-#include "ltm.h"

-#include "lundump.h"

-#include "lvm.h"

-#include "lzio.h"

-

-

-

-

-/*

-** {======================================================

-** Error-recovery functions (based on long jumps)

-** =======================================================

-*/

-

-

-/* chain list of long jump buffers */

-struct lua_longjmp {

-  struct lua_longjmp *previous;

-  jmp_buf b;

-  volatile int status;  /* error code */

-};

-

-

-static void seterrorobj (lua_State *L, int errcode, StkId oldtop) {

-  switch (errcode) {

-    case LUA_ERRMEM: {

-      setsvalue2s(oldtop, luaS_new(L, MEMERRMSG));

-      break;

-    }

-    case LUA_ERRERR: {

-      setsvalue2s(oldtop, luaS_new(L, "error in error handling"));

-      break;

-    }

-    case LUA_ERRSYNTAX:

-    case LUA_ERRRUN: {

-      setobjs2s(oldtop, L->top - 1);  /* error message on current top */

-      break;

-    }

-  }

-  L->top = oldtop + 1;

-}

-

-

-void luaD_throw (lua_State *L, int errcode) {

-  if (L->errorJmp) {

-    L->errorJmp->status = errcode;

-    longjmp(L->errorJmp->b, 1);

-  }

-  else {

-    G(L)->panic(L);

-    exit(EXIT_FAILURE);

-  }

-}

-

-

-int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud) {

-  struct lua_longjmp lj;

-  lj.status = 0;

-  lj.previous = L->errorJmp;  /* chain new error handler */

-  L->errorJmp = &lj;

-  if (setjmp(lj.b) == 0)

-    (*f)(L, ud);

-  L->errorJmp = lj.previous;  /* restore old error handler */

-  return lj.status;

-}

-

-

-static void restore_stack_limit (lua_State *L) {

-  L->stack_last = L->stack+L->stacksize-1;

-  if (L->size_ci > LUA_MAXCALLS) {  /* there was an overflow? */

-    int inuse = (L->ci - L->base_ci);

-    if (inuse + 1 < LUA_MAXCALLS)  /* can `undo' overflow? */

-      luaD_reallocCI(L, LUA_MAXCALLS);

-  }

-}

-

-/* }====================================================== */

-

-

-static void correctstack (lua_State *L, TObject *oldstack) {

-  CallInfo *ci;

-  GCObject *up;

-  L->top = (L->top - oldstack) + L->stack;

-  for (up = L->openupval; up != NULL; up = up->gch.next)

-    gcotouv(up)->v = (gcotouv(up)->v - oldstack) + L->stack;

-  for (ci = L->base_ci; ci <= L->ci; ci++) {

-    ci->top = (ci->top - oldstack) + L->stack;

-    ci->base = (ci->base - oldstack) + L->stack;

-  }

-  L->base = L->ci->base;

-}

-

-

-void luaD_reallocstack (lua_State *L, int newsize) {

-  TObject *oldstack = L->stack;

-  luaM_reallocvector(L, L->stack, L->stacksize, newsize, TObject);

-  L->stacksize = newsize;

-  L->stack_last = L->stack+newsize-1-EXTRA_STACK;

-  correctstack(L, oldstack);

-}

-

-

-void luaD_reallocCI (lua_State *L, int newsize) {

-  CallInfo *oldci = L->base_ci;

-  luaM_reallocvector(L, L->base_ci, L->size_ci, newsize, CallInfo);

-  L->size_ci = cast(unsigned short, newsize);

-  L->ci = (L->ci - oldci) + L->base_ci;

-  L->end_ci = L->base_ci + L->size_ci;

-}

-

-

-void luaD_growstack (lua_State *L, int n) {

-  if (n <= L->stacksize)  /* double size is enough? */

-    luaD_reallocstack(L, 2*L->stacksize);

-  else

-    luaD_reallocstack(L, L->stacksize + n + EXTRA_STACK);

-}

-

-

-static void luaD_growCI (lua_State *L) {

-  if (L->size_ci > LUA_MAXCALLS)  /* overflow while handling overflow? */

-    luaD_throw(L, LUA_ERRERR);

-  else {

-    luaD_reallocCI(L, 2*L->size_ci);

-    if (L->size_ci > LUA_MAXCALLS)

-      luaG_runerror(L, "stack overflow");

-  }

-}

-

-

-void luaD_callhook (lua_State *L, int event, int line) {

-  lua_Hook hook = L->hook;

-  if (hook && L->allowhook) {

-    ptrdiff_t top = savestack(L, L->top);

-    ptrdiff_t ci_top = savestack(L, L->ci->top);

-    lua_Debug ar;

-    ar.event = event;

-    ar.currentline = line;

-    if (event == LUA_HOOKTAILRET)

-      ar.i_ci = 0;  /* tail call; no debug information about it */

-    else

-      ar.i_ci = L->ci - L->base_ci;

-    luaD_checkstack(L, LUA_MINSTACK);  /* ensure minimum stack size */

-    L->ci->top = L->top + LUA_MINSTACK;

-    L->allowhook = 0;  /* cannot call hooks inside a hook */

-    lua_unlock(L);

-    (*hook)(L, &ar);

-    lua_lock(L);

-    lua_assert(!L->allowhook);

-    L->allowhook = 1;

-    L->ci->top = restorestack(L, ci_top);

-    L->top = restorestack(L, top);

-  }

-}

-

-

-static void adjust_varargs (lua_State *L, int nfixargs, StkId base) {

-  int i;

-  Table *htab;

-  TObject nname;

-  int actual = L->top - base;  /* actual number of arguments */

-  if (actual < nfixargs) {

-    luaD_checkstack(L, nfixargs - actual);

-    for (; actual < nfixargs; ++actual)

-      setnilvalue(L->top++);

-  }

-  actual -= nfixargs;  /* number of extra arguments */

-  htab = luaH_new(L, actual, 1);  /* create `arg' table */

-  for (i=0; i<actual; i++)  /* put extra arguments into `arg' table */

-    setobj2n(luaH_setnum(L, htab, i+1), L->top - actual + i);

-  /* store counter in field `n' */

-  setsvalue(&nname, luaS_newliteral(L, "n"));

-  setnvalue(luaH_set(L, htab, &nname), cast(lua_Number, actual));

-  L->top -= actual;  /* remove extra elements from the stack */

-  sethvalue(L->top, htab);

-  incr_top(L);

-}

-

-

-static StkId tryfuncTM (lua_State *L, StkId func) {

-  const TObject *tm = luaT_gettmbyobj(L, func, TM_CALL);

-  StkId p;

-  ptrdiff_t funcr = savestack(L, func);

-  if (!ttisfunction(tm))

-    luaG_typeerror(L, func, "call");

-  /* Open a hole inside the stack at `func' */

-  for (p = L->top; p > func; p--) setobjs2s(p, p-1);

-  incr_top(L);

-  func = restorestack(L, funcr);  /* previous call may change stack */

-  setobj2s(func, tm);  /* tag method is the new function to be called */

-  return func;

-}

-

-

-StkId luaD_precall (lua_State *L, StkId func) {

-  LClosure *cl;

-  ptrdiff_t funcr = savestack(L, func);

-  if (!ttisfunction(func)) /* `func' is not a function? */

-    func = tryfuncTM(L, func);  /* check the `function' tag method */

-  if (L->ci + 1 == L->end_ci) luaD_growCI(L);

-  else condhardstacktests(luaD_reallocCI(L, L->size_ci));

-  cl = &clvalue(func)->l;

-  if (!cl->isC) {  /* Lua function? prepare its call */

-    CallInfo *ci;

-    Proto *p = cl->p;

-    if (p->is_vararg)  /* varargs? */

-      adjust_varargs(L, p->numparams, func+1);

-    luaD_checkstack(L, p->maxstacksize);

-    ci = ++L->ci;  /* now `enter' new function */

-    L->base = L->ci->base = restorestack(L, funcr) + 1;

-    ci->top = L->base + p->maxstacksize;

-    ci->u.l.savedpc = p->code;  /* starting point */

-    ci->u.l.tailcalls = 0;

-    ci->state = CI_SAVEDPC;

-    while (L->top < ci->top)

-      setnilvalue(L->top++);

-    L->top = ci->top;

-    return NULL;

-  }

-  else {  /* if is a C function, call it */

-    CallInfo *ci;

-    int n;

-    luaD_checkstack(L, LUA_MINSTACK);  /* ensure minimum stack size */

-    ci = ++L->ci;  /* now `enter' new function */

-    L->base = L->ci->base = restorestack(L, funcr) + 1;

-    ci->top = L->top + LUA_MINSTACK;

-    ci->state = CI_C;  /* a C function */

-    if (L->hookmask & LUA_MASKCALL)

-      luaD_callhook(L, LUA_HOOKCALL, -1);

-    lua_unlock(L);

-#ifdef LUA_COMPATUPVALUES

-    lua_pushupvalues(L);

-#endif

-    n = (*clvalue(L->base - 1)->c.f)(L);  /* do the actual call */

-    lua_lock(L);

-    return L->top - n;

-  }

-}

-

-

-static StkId callrethooks (lua_State *L, StkId firstResult) {

-  ptrdiff_t fr = savestack(L, firstResult);  /* next call may change stack */

-  luaD_callhook(L, LUA_HOOKRET, -1);

-  if (!(L->ci->state & CI_C)) {  /* Lua function? */

-    while (L->ci->u.l.tailcalls--)  /* call hook for eventual tail calls */

-      luaD_callhook(L, LUA_HOOKTAILRET, -1);

-  }

-  return restorestack(L, fr);

-}

-

-

-void luaD_poscall (lua_State *L, int wanted, StkId firstResult) { 

-  StkId res;

-  if (L->hookmask & LUA_MASKRET)

-    firstResult = callrethooks(L, firstResult);

-  res = L->base - 1;  /* res == final position of 1st result */

-  L->ci--;

-  L->base = L->ci->base;  /* restore base */

-  /* move results to correct place */

-  while (wanted != 0 && firstResult < L->top) {

-    setobjs2s(res++, firstResult++);

-    wanted--;

-  }

-  while (wanted-- > 0)

-    setnilvalue(res++);

-  L->top = res;

-}

-

-

-/*

-** Call a function (C or Lua). The function to be called is at *func.

-** The arguments are on the stack, right after the function.

-** When returns, all the results are on the stack, starting at the original

-** function position.

-*/ 

-void luaD_call (lua_State *L, StkId func, int nResults) {

-  StkId firstResult;

-  lua_assert(!(L->ci->state & CI_CALLING));

-  if (++L->nCcalls >= LUA_MAXCCALLS) {

-    if (L->nCcalls == LUA_MAXCCALLS)

-      luaG_runerror(L, "C stack overflow");

-    else if (L->nCcalls >= (LUA_MAXCCALLS + (LUA_MAXCCALLS>>3)))

-      luaD_throw(L, LUA_ERRERR);  /* error while handing stack error */

-  }

-  firstResult = luaD_precall(L, func);

-  if (firstResult == NULL)  /* is a Lua function? */

-    firstResult = luaV_execute(L);  /* call it */

-  luaD_poscall(L, nResults, firstResult);

-  L->nCcalls--;

-  luaC_checkGC(L);

-}

-

-

-static void resume (lua_State *L, void *ud) {

-  StkId firstResult;

-  int nargs = *cast(int *, ud);

-  CallInfo *ci = L->ci;

-  if (ci == L->base_ci) {  /* no activation record? */

-    if (nargs >= L->top - L->base)

-      luaG_runerror(L, "cannot resume dead coroutine");

-    luaD_precall(L, L->top - (nargs + 1));  /* start coroutine */

-  }

-  else if (ci->state & CI_YIELD) {  /* inside a yield? */

-    if (ci->state & CI_C) {  /* `common' yield? */

-      /* finish interrupted execution of `OP_CALL' */

-      int nresults;

-      lua_assert((ci-1)->state & CI_SAVEDPC);

-      lua_assert(GET_OPCODE(*((ci-1)->u.l.savedpc - 1)) == OP_CALL ||

-                 GET_OPCODE(*((ci-1)->u.l.savedpc - 1)) == OP_TAILCALL);

-      nresults = GETARG_C(*((ci-1)->u.l.savedpc - 1)) - 1;

-      luaD_poscall(L, nresults, L->top - nargs);  /* complete it */

-      if (nresults >= 0) L->top = L->ci->top;

-    }

-    else {  /* yielded inside a hook: just continue its execution */

-      ci->state &= ~CI_YIELD;

-    }

-  }

-  else

-    luaG_runerror(L, "cannot resume non-suspended coroutine");

-  firstResult = luaV_execute(L);

-  if (firstResult != NULL)   /* return? */

-    luaD_poscall(L, LUA_MULTRET, firstResult);  /* finalize this coroutine */

-}

-

-

-LUA_API int lua_resume (lua_State *L, int nargs) {

-  int status;

-  lu_byte old_allowhooks;

-  lua_lock(L);

-  old_allowhooks = L->allowhook;

-  lua_assert(L->errfunc == 0 && L->nCcalls == 0);

-  status = luaD_rawrunprotected(L, resume, &nargs);

-  if (status != 0) {  /* error? */

-    L->ci = L->base_ci;  /* go back to initial level */

-    L->base = L->ci->base;

-    L->nCcalls = 0;

-    luaF_close(L, L->base);  /* close eventual pending closures */

-    seterrorobj(L, status, L->base);

-    L->allowhook = old_allowhooks;

-    restore_stack_limit(L);

-  }

-  lua_unlock(L);

-  return status;

-}

-

-

-LUA_API int lua_yield (lua_State *L, int nresults) {

-  CallInfo *ci;

-  lua_lock(L);

-  ci = L->ci;

-  if (L->nCcalls > 0)

-    luaG_runerror(L, "attempt to yield across metamethod/C-call boundary");

-  if (ci->state & CI_C) {  /* usual yield */

-    if ((ci-1)->state & CI_C)

-      luaG_runerror(L, "cannot yield a C function");

-    if (L->top - nresults > L->base) {  /* is there garbage in the stack? */

-      int i;

-      for (i=0; i<nresults; i++)  /* move down results */

-        setobjs2s(L->base + i, L->top - nresults + i);

-      L->top = L->base + nresults;

-    }

-  } /* else it's an yield inside a hook: nothing to do */

-  ci->state |= CI_YIELD;

-  lua_unlock(L);

-  return -1;

-}

-

-LUA_API void lua_break (lua_State *L) {

-  CallInfo * ci;

-  lua_lock(L);

-  ci = L->ci;

-  ci->state |= CI_BREAK;

-  lua_unlock(L);

-}

-

-int luaD_pcall (lua_State *L, Pfunc func, void *u,

-                ptrdiff_t old_top, ptrdiff_t ef) {

-  int status;

-  unsigned short oldnCcalls = L->nCcalls;

-  ptrdiff_t old_ci = saveci(L, L->ci);

-  lu_byte old_allowhooks = L->allowhook;

-  ptrdiff_t old_errfunc = L->errfunc;

-  L->errfunc = ef;

-  status = luaD_rawrunprotected(L, func, u);

-  if (status != 0) {  /* an error occurred? */

-    StkId oldtop = restorestack(L, old_top);

-    luaF_close(L, oldtop);  /* close eventual pending closures */

-    seterrorobj(L, status, oldtop);

-    L->nCcalls = oldnCcalls;

-    L->ci = restoreci(L, old_ci);

-    L->base = L->ci->base;

-    L->allowhook = old_allowhooks;

-    restore_stack_limit(L);

-  }

-  L->errfunc = old_errfunc;

-  return status;

-}

-

-

-

-/*

-** Execute a protected parser.

-*/

-struct SParser {  /* data to `f_parser' */

-  ZIO *z;

-  Mbuffer buff;  /* buffer to be used by the scanner */

-  int bin;

-};

-

-static void f_parser (lua_State *L, void *ud) {

-  struct SParser *p;

-  Proto *tf;

-  Closure *cl;

-  luaC_checkGC(L);

-  p = cast(struct SParser *, ud);

-  tf = p->bin ? luaU_undump(L, p->z, &p->buff) : luaY_parser(L, p->z, &p->buff);

-  cl = luaF_newLclosure(L, 0, gt(L));

-  cl->l.p = tf;

-  setclvalue(L->top, cl);

-  incr_top(L);

-}

-

-

-int luaD_protectedparser (lua_State *L, ZIO *z, int bin) {

-  struct SParser p;

-  int status;

-  ptrdiff_t oldtopr = savestack(L, L->top);  /* save current top */

-  p.z = z; p.bin = bin;

-  luaZ_initbuffer(L, &p.buff);

-  status = luaD_rawrunprotected(L, f_parser, &p);

-  luaZ_freebuffer(L, &p.buff);

-  if (status != 0) {  /* error? */

-    StkId oldtop = restorestack(L, oldtopr);

-    seterrorobj(L, status, oldtop);

-  }

-  return status;

-}

-

-

+/*
+** $Id: ldo.c,v 1.5 2004-11-27 21:46:07 pixel Exp $
+** Stack and Call structure of Lua
+** See Copyright Notice in lua.h
+*/
+
+
+#include <setjmp.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define ldo_c
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lgc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lparser.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+#include "lundump.h"
+#include "lvm.h"
+#include "lzio.h"
+
+
+
+
+/*
+** {======================================================
+** Error-recovery functions (based on long jumps)
+** =======================================================
+*/
+
+
+/* chain list of long jump buffers */
+struct lua_longjmp {
+  struct lua_longjmp *previous;
+  jmp_buf b;
+  volatile int status;  /* error code */
+};
+
+
+static void seterrorobj (lua_State *L, int errcode, StkId oldtop) {
+  switch (errcode) {
+    case LUA_ERRMEM: {
+      setsvalue2s(oldtop, luaS_new(L, MEMERRMSG));
+      break;
+    }
+    case LUA_ERRERR: {
+      setsvalue2s(oldtop, luaS_new(L, "error in error handling"));
+      break;
+    }
+    case LUA_ERRSYNTAX:
+    case LUA_ERRRUN: {
+      setobjs2s(oldtop, L->top - 1);  /* error message on current top */
+      break;
+    }
+  }
+  L->top = oldtop + 1;
+}
+
+
+void luaD_throw (lua_State *L, int errcode) {
+  if (L->errorJmp) {
+    L->errorJmp->status = errcode;
+    longjmp(L->errorJmp->b, 1);
+  }
+  else {
+    G(L)->panic(L);
+    exit(EXIT_FAILURE);
+  }
+}
+
+
+int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud) {
+  struct lua_longjmp lj;
+  lj.status = 0;
+  lj.previous = L->errorJmp;  /* chain new error handler */
+  L->errorJmp = &lj;
+  if (setjmp(lj.b) == 0)
+    (*f)(L, ud);
+  L->errorJmp = lj.previous;  /* restore old error handler */
+  return lj.status;
+}
+
+
+static void restore_stack_limit (lua_State *L) {
+  L->stack_last = L->stack+L->stacksize-1;
+  if (L->size_ci > LUA_MAXCALLS) {  /* there was an overflow? */
+    int inuse = (L->ci - L->base_ci);
+    if (inuse + 1 < LUA_MAXCALLS)  /* can `undo' overflow? */
+      luaD_reallocCI(L, LUA_MAXCALLS);
+  }
+}
+
+/* }====================================================== */
+
+
+static void correctstack (lua_State *L, TObject *oldstack) {
+  CallInfo *ci;
+  GCObject *up;
+  L->top = (L->top - oldstack) + L->stack;
+  for (up = L->openupval; up != NULL; up = up->gch.next)
+    gcotouv(up)->v = (gcotouv(up)->v - oldstack) + L->stack;
+  for (ci = L->base_ci; ci <= L->ci; ci++) {
+    ci->top = (ci->top - oldstack) + L->stack;
+    ci->base = (ci->base - oldstack) + L->stack;
+  }
+  L->base = L->ci->base;
+}
+
+
+void luaD_reallocstack (lua_State *L, int newsize) {
+  TObject *oldstack = L->stack;
+  luaM_reallocvector(L, L->stack, L->stacksize, newsize, TObject);
+  L->stacksize = newsize;
+  L->stack_last = L->stack+newsize-1-EXTRA_STACK;
+  correctstack(L, oldstack);
+}
+
+
+void luaD_reallocCI (lua_State *L, int newsize) {
+  CallInfo *oldci = L->base_ci;
+  luaM_reallocvector(L, L->base_ci, L->size_ci, newsize, CallInfo);
+  L->size_ci = cast(unsigned short, newsize);
+  L->ci = (L->ci - oldci) + L->base_ci;
+  L->end_ci = L->base_ci + L->size_ci;
+}
+
+
+void luaD_growstack (lua_State *L, int n) {
+  if (n <= L->stacksize)  /* double size is enough? */
+    luaD_reallocstack(L, 2*L->stacksize);
+  else
+    luaD_reallocstack(L, L->stacksize + n + EXTRA_STACK);
+}
+
+
+static void luaD_growCI (lua_State *L) {
+  if (L->size_ci > LUA_MAXCALLS)  /* overflow while handling overflow? */
+    luaD_throw(L, LUA_ERRERR);
+  else {
+    luaD_reallocCI(L, 2*L->size_ci);
+    if (L->size_ci > LUA_MAXCALLS)
+      luaG_runerror(L, "stack overflow");
+  }
+}
+
+
+void luaD_callhook (lua_State *L, int event, int line) {
+  lua_Hook hook = L->hook;
+  if (hook && L->allowhook) {
+    ptrdiff_t top = savestack(L, L->top);
+    ptrdiff_t ci_top = savestack(L, L->ci->top);
+    lua_Debug ar;
+    ar.event = event;
+    ar.currentline = line;
+    if (event == LUA_HOOKTAILRET)
+      ar.i_ci = 0;  /* tail call; no debug information about it */
+    else
+      ar.i_ci = L->ci - L->base_ci;
+    luaD_checkstack(L, LUA_MINSTACK);  /* ensure minimum stack size */
+    L->ci->top = L->top + LUA_MINSTACK;
+    L->allowhook = 0;  /* cannot call hooks inside a hook */
+    lua_unlock(L);
+    (*hook)(L, &ar);
+    lua_lock(L);
+    lua_assert(!L->allowhook);
+    L->allowhook = 1;
+    L->ci->top = restorestack(L, ci_top);
+    L->top = restorestack(L, top);
+  }
+}
+
+
+static void adjust_varargs (lua_State *L, int nfixargs, StkId base) {
+  int i;
+  Table *htab;
+  TObject nname;
+  int actual = L->top - base;  /* actual number of arguments */
+  if (actual < nfixargs) {
+    luaD_checkstack(L, nfixargs - actual);
+    for (; actual < nfixargs; ++actual)
+      setnilvalue(L->top++);
+  }
+  actual -= nfixargs;  /* number of extra arguments */
+  htab = luaH_new(L, actual, 1);  /* create `arg' table */
+  for (i=0; i<actual; i++)  /* put extra arguments into `arg' table */
+    setobj2n(luaH_setnum(L, htab, i+1), L->top - actual + i);
+  /* store counter in field `n' */
+  setsvalue(&nname, luaS_newliteral(L, "n"));
+  setnvalue(luaH_set(L, htab, &nname), cast(lua_Number, actual));
+  L->top -= actual;  /* remove extra elements from the stack */
+  sethvalue(L->top, htab);
+  incr_top(L);
+}
+
+
+static StkId tryfuncTM (lua_State *L, StkId func) {
+  const TObject *tm = luaT_gettmbyobj(L, func, TM_CALL);
+  StkId p;
+  ptrdiff_t funcr = savestack(L, func);
+  if (!ttisfunction(tm))
+    luaG_typeerror(L, func, "call");
+  /* Open a hole inside the stack at `func' */
+  for (p = L->top; p > func; p--) setobjs2s(p, p-1);
+  incr_top(L);
+  func = restorestack(L, funcr);  /* previous call may change stack */
+  setobj2s(func, tm);  /* tag method is the new function to be called */
+  return func;
+}
+
+
+StkId luaD_precall (lua_State *L, StkId func) {
+  LClosure *cl;
+  ptrdiff_t funcr = savestack(L, func);
+  if (!ttisfunction(func)) /* `func' is not a function? */
+    func = tryfuncTM(L, func);  /* check the `function' tag method */
+  if (L->ci + 1 == L->end_ci) luaD_growCI(L);
+  else condhardstacktests(luaD_reallocCI(L, L->size_ci));
+  cl = &clvalue(func)->l;
+  if (!cl->isC) {  /* Lua function? prepare its call */
+    CallInfo *ci;
+    Proto *p = cl->p;
+    if (p->is_vararg)  /* varargs? */
+      adjust_varargs(L, p->numparams, func+1);
+    luaD_checkstack(L, p->maxstacksize);
+    ci = ++L->ci;  /* now `enter' new function */
+    L->base = L->ci->base = restorestack(L, funcr) + 1;
+    ci->top = L->base + p->maxstacksize;
+    ci->u.l.savedpc = p->code;  /* starting point */
+    ci->u.l.tailcalls = 0;
+    ci->state = CI_SAVEDPC;
+    while (L->top < ci->top)
+      setnilvalue(L->top++);
+    L->top = ci->top;
+    return NULL;
+  }
+  else {  /* if is a C function, call it */
+    CallInfo *ci;
+    int n;
+    luaD_checkstack(L, LUA_MINSTACK);  /* ensure minimum stack size */
+    ci = ++L->ci;  /* now `enter' new function */
+    L->base = L->ci->base = restorestack(L, funcr) + 1;
+    ci->top = L->top + LUA_MINSTACK;
+    ci->state = CI_C;  /* a C function */
+    if (L->hookmask & LUA_MASKCALL)
+      luaD_callhook(L, LUA_HOOKCALL, -1);
+    lua_unlock(L);
+#ifdef LUA_COMPATUPVALUES
+    lua_pushupvalues(L);
+#endif
+    n = (*clvalue(L->base - 1)->c.f)(L);  /* do the actual call */
+    lua_lock(L);
+    return L->top - n;
+  }
+}
+
+
+static StkId callrethooks (lua_State *L, StkId firstResult) {
+  ptrdiff_t fr = savestack(L, firstResult);  /* next call may change stack */
+  luaD_callhook(L, LUA_HOOKRET, -1);
+  if (!(L->ci->state & CI_C)) {  /* Lua function? */
+    while (L->ci->u.l.tailcalls--)  /* call hook for eventual tail calls */
+      luaD_callhook(L, LUA_HOOKTAILRET, -1);
+  }
+  return restorestack(L, fr);
+}
+
+
+void luaD_poscall (lua_State *L, int wanted, StkId firstResult) { 
+  StkId res;
+  if (L->hookmask & LUA_MASKRET)
+    firstResult = callrethooks(L, firstResult);
+  res = L->base - 1;  /* res == final position of 1st result */
+  L->ci--;
+  L->base = L->ci->base;  /* restore base */
+  /* move results to correct place */
+  while (wanted != 0 && firstResult < L->top) {
+    setobjs2s(res++, firstResult++);
+    wanted--;
+  }
+  while (wanted-- > 0)
+    setnilvalue(res++);
+  L->top = res;
+}
+
+
+/*
+** Call a function (C or Lua). The function to be called is at *func.
+** The arguments are on the stack, right after the function.
+** When returns, all the results are on the stack, starting at the original
+** function position.
+*/ 
+void luaD_call (lua_State *L, StkId func, int nResults) {
+  StkId firstResult;
+  lua_assert(!(L->ci->state & CI_CALLING));
+  if (++L->nCcalls >= LUA_MAXCCALLS) {
+    if (L->nCcalls == LUA_MAXCCALLS)
+      luaG_runerror(L, "C stack overflow");
+    else if (L->nCcalls >= (LUA_MAXCCALLS + (LUA_MAXCCALLS>>3)))
+      luaD_throw(L, LUA_ERRERR);  /* error while handing stack error */
+  }
+  firstResult = luaD_precall(L, func);
+  if (firstResult == NULL)  /* is a Lua function? */
+    firstResult = luaV_execute(L);  /* call it */
+  luaD_poscall(L, nResults, firstResult);
+  L->nCcalls--;
+  luaC_checkGC(L);
+}
+
+
+static void resume (lua_State *L, void *ud) {
+  StkId firstResult;
+  int nargs = *cast(int *, ud);
+  CallInfo *ci = L->ci;
+  if (ci == L->base_ci) {  /* no activation record? */
+    if (nargs >= L->top - L->base)
+      luaG_runerror(L, "cannot resume dead coroutine");
+    luaD_precall(L, L->top - (nargs + 1));  /* start coroutine */
+  }
+  else if (ci->state & CI_YIELD) {  /* inside a yield? */
+    if (ci->state & CI_C) {  /* `common' yield? */
+      /* finish interrupted execution of `OP_CALL' */
+      int nresults;
+      lua_assert((ci-1)->state & CI_SAVEDPC);
+      lua_assert(GET_OPCODE(*((ci-1)->u.l.savedpc - 1)) == OP_CALL ||
+                 GET_OPCODE(*((ci-1)->u.l.savedpc - 1)) == OP_TAILCALL);
+      nresults = GETARG_C(*((ci-1)->u.l.savedpc - 1)) - 1;
+      luaD_poscall(L, nresults, L->top - nargs);  /* complete it */
+      if (nresults >= 0) L->top = L->ci->top;
+    }
+    else {  /* yielded inside a hook: just continue its execution */
+      ci->state &= ~CI_YIELD;
+    }
+  }
+  else
+    luaG_runerror(L, "cannot resume non-suspended coroutine");
+  firstResult = luaV_execute(L);
+  if (firstResult != NULL)   /* return? */
+    luaD_poscall(L, LUA_MULTRET, firstResult);  /* finalize this coroutine */
+}
+
+
+LUA_API int lua_resume (lua_State *L, int nargs) {
+  int status;
+  lu_byte old_allowhooks;
+  lua_lock(L);
+  old_allowhooks = L->allowhook;
+  lua_assert(L->errfunc == 0 && L->nCcalls == 0);
+  status = luaD_rawrunprotected(L, resume, &nargs);
+  if (status != 0) {  /* error? */
+    L->ci = L->base_ci;  /* go back to initial level */
+    L->base = L->ci->base;
+    L->nCcalls = 0;
+    luaF_close(L, L->base);  /* close eventual pending closures */
+    seterrorobj(L, status, L->base);
+    L->allowhook = old_allowhooks;
+    restore_stack_limit(L);
+  }
+  lua_unlock(L);
+  return status;
+}
+
+
+LUA_API int lua_yield (lua_State *L, int nresults) {
+  CallInfo *ci;
+  lua_lock(L);
+  ci = L->ci;
+  if (L->nCcalls > 0)
+    luaG_runerror(L, "attempt to yield across metamethod/C-call boundary");
+  if (ci->state & CI_C) {  /* usual yield */
+    if ((ci-1)->state & CI_C)
+      luaG_runerror(L, "cannot yield a C function");
+    if (L->top - nresults > L->base) {  /* is there garbage in the stack? */
+      int i;
+      for (i=0; i<nresults; i++)  /* move down results */
+        setobjs2s(L->base + i, L->top - nresults + i);
+      L->top = L->base + nresults;
+    }
+  } /* else it's an yield inside a hook: nothing to do */
+  ci->state |= CI_YIELD;
+  lua_unlock(L);
+  return -1;
+}
+
+LUA_API void lua_break (lua_State *L) {
+  CallInfo * ci;
+  lua_lock(L);
+  ci = L->ci;
+  ci->state |= CI_BREAK;
+  lua_unlock(L);
+}
+
+int luaD_pcall (lua_State *L, Pfunc func, void *u,
+                ptrdiff_t old_top, ptrdiff_t ef) {
+  int status;
+  unsigned short oldnCcalls = L->nCcalls;
+  ptrdiff_t old_ci = saveci(L, L->ci);
+  lu_byte old_allowhooks = L->allowhook;
+  ptrdiff_t old_errfunc = L->errfunc;
+  L->errfunc = ef;
+  status = luaD_rawrunprotected(L, func, u);
+  if (status != 0) {  /* an error occurred? */
+    StkId oldtop = restorestack(L, old_top);
+    luaF_close(L, oldtop);  /* close eventual pending closures */
+    seterrorobj(L, status, oldtop);
+    L->nCcalls = oldnCcalls;
+    L->ci = restoreci(L, old_ci);
+    L->base = L->ci->base;
+    L->allowhook = old_allowhooks;
+    restore_stack_limit(L);
+  }
+  L->errfunc = old_errfunc;
+  return status;
+}
+
+
+
+/*
+** Execute a protected parser.
+*/
+struct SParser {  /* data to `f_parser' */
+  ZIO *z;
+  Mbuffer buff;  /* buffer to be used by the scanner */
+  int bin;
+};
+
+static void f_parser (lua_State *L, void *ud) {
+  struct SParser *p;
+  Proto *tf;
+  Closure *cl;
+  luaC_checkGC(L);
+  p = cast(struct SParser *, ud);
+  tf = p->bin ? luaU_undump(L, p->z, &p->buff) : luaY_parser(L, p->z, &p->buff);
+  cl = luaF_newLclosure(L, 0, gt(L));
+  cl->l.p = tf;
+  setclvalue(L->top, cl);
+  incr_top(L);
+}
+
+
+int luaD_protectedparser (lua_State *L, ZIO *z, int bin) {
+  struct SParser p;
+  int status;
+  ptrdiff_t oldtopr = savestack(L, L->top);  /* save current top */
+  p.z = z; p.bin = bin;
+  luaZ_initbuffer(L, &p.buff);
+  status = luaD_rawrunprotected(L, f_parser, &p);
+  luaZ_freebuffer(L, &p.buff);
+  if (status != 0) {  /* error? */
+    StkId oldtop = restorestack(L, oldtopr);
+    seterrorobj(L, status, oldtop);
+  }
+  return status;
+}
+
+
diff --git a/lib/lua/src/ldump.c b/lib/lua/src/ldump.c
index 47a2140..2bcfd5d 100644
--- a/lib/lua/src/ldump.c
+++ b/lib/lua/src/ldump.c
@@ -1,170 +1,170 @@
-/*

-** $Id: ldump.c,v 1.3 2004-11-27 21:35:20 pixel Exp $

-** save bytecodes

-** See Copyright Notice in lua.h

-*/

-

-#include <stddef.h>

-

-#define ldump_c

-

-#include "lua.h"

-

-#include "lobject.h"

-#include "lopcodes.h"

-#include "lstate.h"

-#include "lundump.h"

-

-#define DumpVector(b,n,size,D)	DumpBlock(b,(n)*(size),D)

-#define DumpLiteral(s,D)	DumpBlock("" s,(sizeof(s))-1,D)

-

-typedef struct {

- lua_State* L;

- lua_Chunkwriter write;

- void* data;

-} DumpState;

-

-static void DumpBlock(const void* b, size_t size, DumpState* D)

-{

- lua_unlock(D->L);

- (*D->write)(D->L,b,size,D->data);

- lua_lock(D->L);

-}

-

-static void DumpByte(int y, DumpState* D)

-{

- char x=(char)y;

- DumpBlock(&x,sizeof(x),D);

-}

-

-static void DumpInt(int x, DumpState* D)

-{

- DumpBlock(&x,sizeof(x),D);

-}

-

-static void DumpSize(size_t x, DumpState* D)

-{

- DumpBlock(&x,sizeof(x),D);

-}

-

-static void DumpNumber(lua_Number x, DumpState* D)

-{

- DumpBlock(&x,sizeof(x),D);

-}

-

-static void DumpString(TString* s, DumpState* D)

-{

- if (s==NULL || getstr(s)==NULL)

-  DumpSize(0,D);

- else

- {

-  size_t size=s->tsv.len+1;		/* include trailing '\0' */

-  DumpSize(size,D);

-  DumpBlock(getstr(s),size,D);

- }

-}

-

-static void DumpCode(const Proto* f, DumpState* D)

-{

- DumpInt(f->sizecode,D);

- DumpVector(f->code,f->sizecode,sizeof(*f->code),D);

-}

-

-static void DumpLocals(const Proto* f, DumpState* D)

-{

- int i,n=f->sizelocvars;

- DumpInt(n,D);

- for (i=0; i<n; i++)

- {

-  DumpString(f->locvars[i].varname,D);

-  DumpInt(f->locvars[i].startpc,D);

-  DumpInt(f->locvars[i].endpc,D);

- }

-}

-

-static void DumpLines(const Proto* f, DumpState* D)

-{

- DumpInt(f->sizelineinfo,D);

- DumpVector(f->lineinfo,f->sizelineinfo,sizeof(*f->lineinfo),D);

-}

-

-static void DumpUpvalues(const Proto* f, DumpState* D)

-{

- int i,n=f->sizeupvalues;

- DumpInt(n,D);

- for (i=0; i<n; i++) DumpString(f->upvalues[i],D);

-}

-

-static void DumpFunction(const Proto* f, const TString* p, DumpState* D);

-

-static void DumpConstants(const Proto* f, DumpState* D)

-{

- int i,n;

- DumpInt(n=f->sizek,D);

- for (i=0; i<n; i++)

- {

-  const TObject* o=&f->k[i];

-  DumpByte(ttype(o),D);

-  switch (ttype(o))

-  {

-   case LUA_TNUMBER:

-	DumpNumber(nvalue(o),D);

-	break;

-   case LUA_TSTRING:

-	DumpString(tsvalue(o),D);

-	break;

-   case LUA_TNIL:

-	break;

-   default:

-	lua_assert(0);			/* cannot happen */

-	break;

-  }

- }

- DumpInt(n=f->sizep,D);

- for (i=0; i<n; i++) DumpFunction(f->p[i],f->source,D);

-}

-

-static void DumpFunction(const Proto* f, const TString* p, DumpState* D)

-{

- DumpString((f->source==p) ? NULL : f->source,D);

- DumpInt(f->lineDefined,D);

- DumpByte(f->nups,D);

- DumpByte(f->numparams,D);

- DumpByte(f->is_vararg,D);

- DumpByte(f->maxstacksize,D);

- DumpLines(f,D);

- DumpLocals(f,D);

- DumpUpvalues(f,D);

- DumpConstants(f,D);

- DumpCode(f,D);

-}

-

-static void DumpHeader(DumpState* D)

-{

- DumpLiteral(LUA_SIGNATURE,D);

- DumpByte(VERSION,D);

- DumpByte(luaU_endianness(),D);

- DumpByte(sizeof(int),D);

- DumpByte(sizeof(size_t),D);

- DumpByte(sizeof(Instruction),D);

- DumpByte(SIZE_OP,D);

- DumpByte(SIZE_A,D);

- DumpByte(SIZE_B,D);

- DumpByte(SIZE_C,D);

- DumpByte(sizeof(lua_Number),D);

- DumpNumber(TEST_NUMBER,D);

-}

-

-/*

-** dump function as precompiled chunk

-*/

-void luaU_dump (lua_State* L, const Proto* Main, lua_Chunkwriter w, void* data)

-{

- DumpState D;

- D.L=L;

- D.write=w;

- D.data=data;

- DumpHeader(&D);

- DumpFunction(Main,NULL,&D);

-}

-

+/*
+** $Id: ldump.c,v 1.4 2004-11-27 21:46:07 pixel Exp $
+** save bytecodes
+** See Copyright Notice in lua.h
+*/
+
+#include <stddef.h>
+
+#define ldump_c
+
+#include "lua.h"
+
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lstate.h"
+#include "lundump.h"
+
+#define DumpVector(b,n,size,D)	DumpBlock(b,(n)*(size),D)
+#define DumpLiteral(s,D)	DumpBlock("" s,(sizeof(s))-1,D)
+
+typedef struct {
+ lua_State* L;
+ lua_Chunkwriter write;
+ void* data;
+} DumpState;
+
+static void DumpBlock(const void* b, size_t size, DumpState* D)
+{
+ lua_unlock(D->L);
+ (*D->write)(D->L,b,size,D->data);
+ lua_lock(D->L);
+}
+
+static void DumpByte(int y, DumpState* D)
+{
+ char x=(char)y;
+ DumpBlock(&x,sizeof(x),D);
+}
+
+static void DumpInt(int x, DumpState* D)
+{
+ DumpBlock(&x,sizeof(x),D);
+}
+
+static void DumpSize(size_t x, DumpState* D)
+{
+ DumpBlock(&x,sizeof(x),D);
+}
+
+static void DumpNumber(lua_Number x, DumpState* D)
+{
+ DumpBlock(&x,sizeof(x),D);
+}
+
+static void DumpString(TString* s, DumpState* D)
+{
+ if (s==NULL || getstr(s)==NULL)
+  DumpSize(0,D);
+ else
+ {
+  size_t size=s->tsv.len+1;		/* include trailing '\0' */
+  DumpSize(size,D);
+  DumpBlock(getstr(s),size,D);
+ }
+}
+
+static void DumpCode(const Proto* f, DumpState* D)
+{
+ DumpInt(f->sizecode,D);
+ DumpVector(f->code,f->sizecode,sizeof(*f->code),D);
+}
+
+static void DumpLocals(const Proto* f, DumpState* D)
+{
+ int i,n=f->sizelocvars;
+ DumpInt(n,D);
+ for (i=0; i<n; i++)
+ {
+  DumpString(f->locvars[i].varname,D);
+  DumpInt(f->locvars[i].startpc,D);
+  DumpInt(f->locvars[i].endpc,D);
+ }
+}
+
+static void DumpLines(const Proto* f, DumpState* D)
+{
+ DumpInt(f->sizelineinfo,D);
+ DumpVector(f->lineinfo,f->sizelineinfo,sizeof(*f->lineinfo),D);
+}
+
+static void DumpUpvalues(const Proto* f, DumpState* D)
+{
+ int i,n=f->sizeupvalues;
+ DumpInt(n,D);
+ for (i=0; i<n; i++) DumpString(f->upvalues[i],D);
+}
+
+static void DumpFunction(const Proto* f, const TString* p, DumpState* D);
+
+static void DumpConstants(const Proto* f, DumpState* D)
+{
+ int i,n;
+ DumpInt(n=f->sizek,D);
+ for (i=0; i<n; i++)
+ {
+  const TObject* o=&f->k[i];
+  DumpByte(ttype(o),D);
+  switch (ttype(o))
+  {
+   case LUA_TNUMBER:
+	DumpNumber(nvalue(o),D);
+	break;
+   case LUA_TSTRING:
+	DumpString(tsvalue(o),D);
+	break;
+   case LUA_TNIL:
+	break;
+   default:
+	lua_assert(0);			/* cannot happen */
+	break;
+  }
+ }
+ DumpInt(n=f->sizep,D);
+ for (i=0; i<n; i++) DumpFunction(f->p[i],f->source,D);
+}
+
+static void DumpFunction(const Proto* f, const TString* p, DumpState* D)
+{
+ DumpString((f->source==p) ? NULL : f->source,D);
+ DumpInt(f->lineDefined,D);
+ DumpByte(f->nups,D);
+ DumpByte(f->numparams,D);
+ DumpByte(f->is_vararg,D);
+ DumpByte(f->maxstacksize,D);
+ DumpLines(f,D);
+ DumpLocals(f,D);
+ DumpUpvalues(f,D);
+ DumpConstants(f,D);
+ DumpCode(f,D);
+}
+
+static void DumpHeader(DumpState* D)
+{
+ DumpLiteral(LUA_SIGNATURE,D);
+ DumpByte(VERSION,D);
+ DumpByte(luaU_endianness(),D);
+ DumpByte(sizeof(int),D);
+ DumpByte(sizeof(size_t),D);
+ DumpByte(sizeof(Instruction),D);
+ DumpByte(SIZE_OP,D);
+ DumpByte(SIZE_A,D);
+ DumpByte(SIZE_B,D);
+ DumpByte(SIZE_C,D);
+ DumpByte(sizeof(lua_Number),D);
+ DumpNumber(TEST_NUMBER,D);
+}
+
+/*
+** dump function as precompiled chunk
+*/
+void luaU_dump (lua_State* L, const Proto* Main, lua_Chunkwriter w, void* data)
+{
+ DumpState D;
+ D.L=L;
+ D.write=w;
+ D.data=data;
+ DumpHeader(&D);
+ DumpFunction(Main,NULL,&D);
+}
+
diff --git a/lib/lua/src/lfunc.c b/lib/lua/src/lfunc.c
index 4e72e53..7dc41e2 100644
--- a/lib/lua/src/lfunc.c
+++ b/lib/lua/src/lfunc.c
@@ -1,135 +1,135 @@
-/*

-** $Id: lfunc.c,v 1.3 2004-11-27 21:35:20 pixel Exp $

-** Auxiliary functions to manipulate prototypes and closures

-** See Copyright Notice in lua.h

-*/

-

-

-#include <stdlib.h>

-

-#define lfunc_c

-

-#include "lua.h"

-

-#include "lfunc.h"

-#include "lgc.h"

-#include "lmem.h"

-#include "lobject.h"

-#include "lstate.h"

-

-

-#define sizeCclosure(n)	(cast(int, sizeof(CClosure)) + \

-                         cast(int, sizeof(TObject)*((n)-1)))

-

-#define sizeLclosure(n)	(cast(int, sizeof(LClosure)) + \

-                         cast(int, sizeof(TObject *)*((n)-1)))

-

-

-

-Closure *luaF_newCclosure (lua_State *L, int nelems) {

-  Closure *c = cast(Closure *, luaM_malloc(L, sizeCclosure(nelems)));

-  luaC_link(L, valtogco(c), LUA_TFUNCTION);

-  c->c.isC = 1;

-  c->c.nupvalues = cast(lu_byte, nelems);

-  return c;

-}

-

-

-Closure *luaF_newLclosure (lua_State *L, int nelems, TObject *e) {

-  Closure *c = cast(Closure *, luaM_malloc(L, sizeLclosure(nelems)));

-  luaC_link(L, valtogco(c), LUA_TFUNCTION);

-  c->l.isC = 0;

-  c->l.g = *e;

-  c->l.nupvalues = cast(lu_byte, nelems);

-  return c;

-}

-

-

-UpVal *luaF_findupval (lua_State *L, StkId level) {

-  GCObject **pp = &L->openupval;

-  UpVal *p;

-  UpVal *v;

-  while ((p = ngcotouv(*pp)) != NULL && p->v >= level) {

-    if (p->v == level) return p;

-    pp = &p->next;

-  }

-  v = luaM_new(L, UpVal);  /* not found: create a new one */

-  v->tt = LUA_TUPVAL;

-  v->marked = 1;  /* open upvalues should not be collected */

-  v->v = level;  /* current value lives in the stack */

-  v->next = *pp;  /* chain it in the proper position */

-  *pp = valtogco(v);

-  return v;

-}

-

-

-void luaF_close (lua_State *L, StkId level) {

-  UpVal *p;

-  while ((p = ngcotouv(L->openupval)) != NULL && p->v >= level) {

-    setobj(&p->value, p->v);  /* save current value (write barrier) */

-    p->v = &p->value;  /* now current value lives here */

-    L->openupval = p->next;  /* remove from `open' list */

-    luaC_link(L, valtogco(p), LUA_TUPVAL);

-  }

-}

-

-

-Proto *luaF_newproto (lua_State *L) {

-  Proto *f = luaM_new(L, Proto);

-  luaC_link(L, valtogco(f), LUA_TPROTO);

-  f->k = NULL;

-  f->sizek = 0;

-  f->p = NULL;

-  f->sizep = 0;

-  f->code = NULL;

-  f->sizecode = 0;

-  f->sizelineinfo = 0;

-  f->sizeupvalues = 0;

-  f->nups = 0;

-  f->upvalues = NULL;

-  f->numparams = 0;

-  f->is_vararg = 0;

-  f->maxstacksize = 0;

-  f->lineinfo = NULL;

-  f->sizelocvars = 0;

-  f->locvars = NULL;

-  f->lineDefined = 0;

-  f->source = NULL;

-  return f;

-}

-

-

-void luaF_freeproto (lua_State *L, Proto *f) {

-  luaM_freearray(L, f->code, f->sizecode, Instruction);

-  luaM_freearray(L, f->p, f->sizep, Proto *);

-  luaM_freearray(L, f->k, f->sizek, TObject);

-  luaM_freearray(L, f->lineinfo, f->sizelineinfo, int);

-  luaM_freearray(L, f->locvars, f->sizelocvars, struct LocVar);

-  luaM_freearray(L, f->upvalues, f->sizeupvalues, TString *);

-  luaM_freelem(L, f);

-}

-

-

-void luaF_freeclosure (lua_State *L, Closure *c) {

-  int size = (c->c.isC) ? sizeCclosure(c->c.nupvalues) :

-                          sizeLclosure(c->l.nupvalues);

-  luaM_free(L, c, size);

-}

-

-

-/*

-** Look for n-th local variable at line `line' in function `func'.

-** Returns NULL if not found.

-*/

-const char *luaF_getlocalname (const Proto *f, int local_number, int pc) {

-  int i;

-  for (i = 0; i<f->sizelocvars && f->locvars[i].startpc <= pc; i++) {

-    if (pc < f->locvars[i].endpc) {  /* is variable active? */

-      local_number--;

-      if (local_number == 0)

-        return getstr(f->locvars[i].varname);

-    }

-  }

-  return NULL;  /* not found */

-}

-

+/*
+** $Id: lfunc.c,v 1.4 2004-11-27 21:46:07 pixel Exp $
+** Auxiliary functions to manipulate prototypes and closures
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdlib.h>
+
+#define lfunc_c
+
+#include "lua.h"
+
+#include "lfunc.h"
+#include "lgc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+
+
+#define sizeCclosure(n)	(cast(int, sizeof(CClosure)) + \
+                         cast(int, sizeof(TObject)*((n)-1)))
+
+#define sizeLclosure(n)	(cast(int, sizeof(LClosure)) + \
+                         cast(int, sizeof(TObject *)*((n)-1)))
+
+
+
+Closure *luaF_newCclosure (lua_State *L, int nelems) {
+  Closure *c = cast(Closure *, luaM_malloc(L, sizeCclosure(nelems)));
+  luaC_link(L, valtogco(c), LUA_TFUNCTION);
+  c->c.isC = 1;
+  c->c.nupvalues = cast(lu_byte, nelems);
+  return c;
+}
+
+
+Closure *luaF_newLclosure (lua_State *L, int nelems, TObject *e) {
+  Closure *c = cast(Closure *, luaM_malloc(L, sizeLclosure(nelems)));
+  luaC_link(L, valtogco(c), LUA_TFUNCTION);
+  c->l.isC = 0;
+  c->l.g = *e;
+  c->l.nupvalues = cast(lu_byte, nelems);
+  return c;
+}
+
+
+UpVal *luaF_findupval (lua_State *L, StkId level) {
+  GCObject **pp = &L->openupval;
+  UpVal *p;
+  UpVal *v;
+  while ((p = ngcotouv(*pp)) != NULL && p->v >= level) {
+    if (p->v == level) return p;
+    pp = &p->next;
+  }
+  v = luaM_new(L, UpVal);  /* not found: create a new one */
+  v->tt = LUA_TUPVAL;
+  v->marked = 1;  /* open upvalues should not be collected */
+  v->v = level;  /* current value lives in the stack */
+  v->next = *pp;  /* chain it in the proper position */
+  *pp = valtogco(v);
+  return v;
+}
+
+
+void luaF_close (lua_State *L, StkId level) {
+  UpVal *p;
+  while ((p = ngcotouv(L->openupval)) != NULL && p->v >= level) {
+    setobj(&p->value, p->v);  /* save current value (write barrier) */
+    p->v = &p->value;  /* now current value lives here */
+    L->openupval = p->next;  /* remove from `open' list */
+    luaC_link(L, valtogco(p), LUA_TUPVAL);
+  }
+}
+
+
+Proto *luaF_newproto (lua_State *L) {
+  Proto *f = luaM_new(L, Proto);
+  luaC_link(L, valtogco(f), LUA_TPROTO);
+  f->k = NULL;
+  f->sizek = 0;
+  f->p = NULL;
+  f->sizep = 0;
+  f->code = NULL;
+  f->sizecode = 0;
+  f->sizelineinfo = 0;
+  f->sizeupvalues = 0;
+  f->nups = 0;
+  f->upvalues = NULL;
+  f->numparams = 0;
+  f->is_vararg = 0;
+  f->maxstacksize = 0;
+  f->lineinfo = NULL;
+  f->sizelocvars = 0;
+  f->locvars = NULL;
+  f->lineDefined = 0;
+  f->source = NULL;
+  return f;
+}
+
+
+void luaF_freeproto (lua_State *L, Proto *f) {
+  luaM_freearray(L, f->code, f->sizecode, Instruction);
+  luaM_freearray(L, f->p, f->sizep, Proto *);
+  luaM_freearray(L, f->k, f->sizek, TObject);
+  luaM_freearray(L, f->lineinfo, f->sizelineinfo, int);
+  luaM_freearray(L, f->locvars, f->sizelocvars, struct LocVar);
+  luaM_freearray(L, f->upvalues, f->sizeupvalues, TString *);
+  luaM_freelem(L, f);
+}
+
+
+void luaF_freeclosure (lua_State *L, Closure *c) {
+  int size = (c->c.isC) ? sizeCclosure(c->c.nupvalues) :
+                          sizeLclosure(c->l.nupvalues);
+  luaM_free(L, c, size);
+}
+
+
+/*
+** Look for n-th local variable at line `line' in function `func'.
+** Returns NULL if not found.
+*/
+const char *luaF_getlocalname (const Proto *f, int local_number, int pc) {
+  int i;
+  for (i = 0; i<f->sizelocvars && f->locvars[i].startpc <= pc; i++) {
+    if (pc < f->locvars[i].endpc) {  /* is variable active? */
+      local_number--;
+      if (local_number == 0)
+        return getstr(f->locvars[i].varname);
+    }
+  }
+  return NULL;  /* not found */
+}
+
diff --git a/lib/lua/src/lgc.c b/lib/lua/src/lgc.c
index f565df6..15ddbb6 100644
--- a/lib/lua/src/lgc.c
+++ b/lib/lua/src/lgc.c
@@ -1,493 +1,493 @@
-/*

-** $Id: lgc.c,v 1.3 2004-11-27 21:35:20 pixel Exp $

-** Garbage Collector

-** See Copyright Notice in lua.h

-*/

-

-#include <string.h>

-

-#define lgc_c

-

-#include "lua.h"

-

-#include "ldebug.h"

-#include "ldo.h"

-#include "lfunc.h"

-#include "lgc.h"

-#include "lmem.h"

-#include "lobject.h"

-#include "lstate.h"

-#include "lstring.h"

-#include "ltable.h"

-#include "ltm.h"

-

-

-typedef struct GCState {

-  GCObject *tmark;  /* list of marked objects to be traversed */

-  GCObject *wk;  /* list of traversed key-weak tables (to be cleared) */

-  GCObject *wv;  /* list of traversed value-weak tables */

-  GCObject *wkv;  /* list of traversed key-value weak tables */

-  global_State *g;

-} GCState;

-

-

-/*

-** some userful bit tricks

-*/

-#define setbit(x,b)	((x) |= (1<<(b)))

-#define resetbit(x,b)	((x) &= cast(lu_byte, ~(1<<(b))))

-#define testbit(x,b)	((x) & (1<<(b)))

-

-#define unmark(x)	resetbit((x)->gch.marked, 0)

-#define ismarked(x)	((x)->gch.marked & ((1<<4)|1))

-

-#define stringmark(s)	setbit((s)->tsv.marked, 0)

-

-

-#define isfinalized(u)		(!testbit((u)->uv.marked, 1))

-#define markfinalized(u)	resetbit((u)->uv.marked, 1)

-

-

-#define KEYWEAKBIT    1

-#define VALUEWEAKBIT  2

-#define KEYWEAK         (1<<KEYWEAKBIT)

-#define VALUEWEAK       (1<<VALUEWEAKBIT)

-

-

-

-#define markobject(st,o) { checkconsistency(o); \

-  if (iscollectable(o) && !ismarked(gcvalue(o))) reallymarkobject(st,gcvalue(o)); }

-

-#define condmarkobject(st,o,c) { checkconsistency(o); \

-  if (iscollectable(o) && !ismarked(gcvalue(o)) && (c)) \

-    reallymarkobject(st,gcvalue(o)); }

-

-#define markvalue(st,t) { if (!ismarked(valtogco(t))) \

-		reallymarkobject(st, valtogco(t)); }

-

-

-

-static void reallymarkobject (GCState *st, GCObject *o) {

-  lua_assert(!ismarked(o));

-  setbit(o->gch.marked, 0);  /* mark object */

-  switch (o->gch.tt) {

-    case LUA_TUSERDATA: {

-      markvalue(st, gcotou(o)->uv.metatable);

-      break;

-    }

-    case LUA_TFUNCTION: {

-      gcotocl(o)->c.gclist = st->tmark;

-      st->tmark = o;

-      break;

-    }

-    case LUA_TTABLE: {

-      gcotoh(o)->gclist = st->tmark;

-      st->tmark = o;

-      break;

-    }

-    case LUA_TTHREAD: {

-      gcototh(o)->gclist = st->tmark;

-      st->tmark = o;

-      break;

-    }

-    case LUA_TPROTO: {

-      gcotop(o)->gclist = st->tmark;

-      st->tmark = o;

-      break;

-    }

-    default: lua_assert(o->gch.tt == LUA_TSTRING);

-  }

-}

-

-

-static void marktmu (GCState *st) {

-  GCObject *u;

-  for (u = st->g->tmudata; u; u = u->gch.next) {

-    unmark(u);  /* may be marked, if left from previous GC */

-    reallymarkobject(st, u);

-  }

-}

-

-

-/* move `dead' udata that need finalization to list `tmudata' */

-void luaC_separateudata (lua_State *L) {

-  GCObject **p = &G(L)->rootudata;

-  GCObject *curr;

-  GCObject *collected = NULL;  /* to collect udata with gc event */

-  GCObject **lastcollected = &collected;

-  while ((curr = *p) != NULL) {

-    lua_assert(curr->gch.tt == LUA_TUSERDATA);

-    if (ismarked(curr) || isfinalized(gcotou(curr)))

-      p = &curr->gch.next;  /* don't bother with them */

-

-    else if (fasttm(L, gcotou(curr)->uv.metatable, TM_GC) == NULL) {

-      markfinalized(gcotou(curr));  /* don't need finalization */

-      p = &curr->gch.next;

-    }

-    else {  /* must call its gc method */

-      *p = curr->gch.next;

-      curr->gch.next = NULL;  /* link `curr' at the end of `collected' list */

-      *lastcollected = curr;

-      lastcollected = &curr->gch.next;

-    }

-  }

-  /* insert collected udata with gc event into `tmudata' list */

-  *lastcollected = G(L)->tmudata;

-  G(L)->tmudata = collected;

-}

-

-

-static void removekey (Node *n) {

-  setnilvalue(gval(n));  /* remove corresponding value ... */

-  if (iscollectable(gkey(n)))

-    setttype(gkey(n), LUA_TNONE);  /* dead key; remove it */

-}

-

-

-static void traversetable (GCState *st, Table *h) {

-  int i;

-  int weakkey = 0;

-  int weakvalue = 0;

-  const TObject *mode;

-  markvalue(st, h->metatable);

-  lua_assert(h->lsizenode || h->node == st->g->dummynode);

-  mode = gfasttm(st->g, h->metatable, TM_MODE);

-  if (mode && ttisstring(mode)) {  /* is there a weak mode? */

-    weakkey = (strchr(svalue(mode), 'k') != NULL);

-    weakvalue = (strchr(svalue(mode), 'v') != NULL);

-    if (weakkey || weakvalue) {  /* is really weak? */

-      GCObject **weaklist;

-      h->marked &= ~(KEYWEAK | VALUEWEAK);  /* clear bits */

-      h->marked |= cast(lu_byte, (weakkey << KEYWEAKBIT) |

-                                 (weakvalue << VALUEWEAKBIT));

-      weaklist = (weakkey && weakvalue) ? &st->wkv :

-                              (weakkey) ? &st->wk :

-                                          &st->wv;

-      h->gclist = *weaklist;  /* must be cleared after GC, ... */

-      *weaklist = valtogco(h);  /* ... so put in the appropriate list */

-    }

-  }

-  if (!weakvalue) {

-    i = h->sizearray;

-    while (i--)

-      markobject(st, &h->array[i]);

-  }

-  i = sizenode(h);

-  while (i--) {

-    Node *n = gnode(h, i);

-    if (!ttisnil(gval(n))) {

-      lua_assert(!ttisnil(gkey(n)));

-      condmarkobject(st, gkey(n), !weakkey);

-      condmarkobject(st, gval(n), !weakvalue);

-    }

-  }

-}

-

-

-static void traverseproto (GCState *st, Proto *f) {

-  int i;

-  stringmark(f->source);

-  for (i=0; i<f->sizek; i++) {  /* mark literal strings */

-    if (ttisstring(f->k+i))

-      stringmark(tsvalue(f->k+i));

-  }

-  for (i=0; i<f->sizeupvalues; i++)  /* mark upvalue names */

-    stringmark(f->upvalues[i]);

-  for (i=0; i<f->sizep; i++)  /* mark nested protos */

-    markvalue(st, f->p[i]);

-  for (i=0; i<f->sizelocvars; i++)  /* mark local-variable names */

-    stringmark(f->locvars[i].varname);

-  lua_assert(luaG_checkcode(f));

-}

-

-

-

-static void traverseclosure (GCState *st, Closure *cl) {

-  if (cl->c.isC) {

-    int i;

-    for (i=0; i<cl->c.nupvalues; i++)  /* mark its upvalues */

-      markobject(st, &cl->c.upvalue[i]);

-  }

-  else {

-    int i;

-    lua_assert(cl->l.nupvalues == cl->l.p->nups);

-    markvalue(st, hvalue(&cl->l.g));

-    markvalue(st, cl->l.p);

-    for (i=0; i<cl->l.nupvalues; i++) {  /* mark its upvalues */

-      UpVal *u = cl->l.upvals[i];

-      if (!u->marked) {

-        markobject(st, &u->value);

-        u->marked = 1;

-      }

-    }

-  }

-}

-

-

-static void checkstacksizes (lua_State *L, StkId max) {

-  int used = L->ci - L->base_ci;  /* number of `ci' in use */

-  if (4*used < L->size_ci && 2*BASIC_CI_SIZE < L->size_ci)

-    luaD_reallocCI(L, L->size_ci/2);  /* still big enough... */

-  else condhardstacktests(luaD_reallocCI(L, L->size_ci));

-  used = max - L->stack;  /* part of stack in use */

-  if (4*used < L->stacksize && 2*(BASIC_STACK_SIZE+EXTRA_STACK) < L->stacksize)

-    luaD_reallocstack(L, L->stacksize/2);  /* still big enough... */

-  else condhardstacktests(luaD_reallocstack(L, L->stacksize));

-}

-

-

-static void traversestack (GCState *st, lua_State *L1) {

-  StkId o, lim;

-  CallInfo *ci;

-  markobject(st, gt(L1));

-  lim = L1->top;

-  for (ci = L1->base_ci; ci <= L1->ci; ci++) {

-    lua_assert(ci->top <= L1->stack_last);

-    lua_assert(ci->state & (CI_C | CI_HASFRAME | CI_SAVEDPC));

-    if (!(ci->state & CI_C) && lim < ci->top)

-      lim = ci->top;

-  }

-  for (o = L1->stack; o < L1->top; o++)

-    markobject(st, o);

-  for (; o <= lim; o++)

-    setnilvalue(o);

-  checkstacksizes(L1, lim);

-}

-

-

-static void propagatemarks (GCState *st) {

-  while (st->tmark) {  /* traverse marked objects */

-    switch (st->tmark->gch.tt) {

-      case LUA_TTABLE: {

-        Table *h = gcotoh(st->tmark);

-        st->tmark = h->gclist;

-        traversetable(st, h);

-        break;

-      }

-      case LUA_TFUNCTION: {

-        Closure *cl = gcotocl(st->tmark);

-        st->tmark = cl->c.gclist;

-        traverseclosure(st, cl);

-        break;

-      }

-      case LUA_TTHREAD: {

-        lua_State *th = gcototh(st->tmark);

-        st->tmark = th->gclist;

-        traversestack(st, th);

-        break;

-      }

-      case LUA_TPROTO: {

-        Proto *p = gcotop(st->tmark);

-        st->tmark = p->gclist;

-        traverseproto(st, p);

-        break;

-      }

-      default: lua_assert(0);

-    }

-  }

-}

-

-

-static int valismarked (const TObject *o) {

-  if (ttisstring(o))

-    stringmark(tsvalue(o));  /* strings are `values', so are never weak */

-  return !iscollectable(o) || testbit(o->value.gc->gch.marked, 0);

-}

-

-

-/*

-** clear collected keys from weaktables

-*/

-static void cleartablekeys (GCObject *l) {

-  while (l) {

-    Table *h = gcotoh(l);

-    int i = sizenode(h);

-    lua_assert(h->marked & KEYWEAK);

-    while (i--) {

-      Node *n = gnode(h, i);

-      if (!valismarked(gkey(n)))  /* key was collected? */

-        removekey(n);  /* remove entry from table */

-    }

-    l = h->gclist;

-  }

-}

-

-

-/*

-** clear collected values from weaktables

-*/

-static void cleartablevalues (GCObject *l) {

-  while (l) {

-    Table *h = gcotoh(l);

-    int i = h->sizearray;

-    lua_assert(h->marked & VALUEWEAK);

-    while (i--) {

-      TObject *o = &h->array[i];

-      if (!valismarked(o))  /* value was collected? */

-        setnilvalue(o);  /* remove value */

-    }

-    i = sizenode(h);

-    while (i--) {

-      Node *n = gnode(h, i);

-      if (!valismarked(gval(n)))  /* value was collected? */

-        removekey(n);  /* remove entry from table */

-    }

-    l = h->gclist;

-  }

-}

-

-

-static void freeobj (lua_State *L, GCObject *o) {

-  switch (o->gch.tt) {

-    case LUA_TPROTO: luaF_freeproto(L, gcotop(o)); break;

-    case LUA_TFUNCTION: luaF_freeclosure(L, gcotocl(o)); break;

-    case LUA_TUPVAL: luaM_freelem(L, gcotouv(o)); break;

-    case LUA_TTABLE: luaH_free(L, gcotoh(o)); break;

-    case LUA_TTHREAD: {

-      lua_assert(gcototh(o) != L && gcototh(o) != G(L)->mainthread);

-      luaE_freethread(L, gcototh(o));

-      break;

-    }

-    case LUA_TSTRING: {

-      luaM_free(L, o, sizestring(gcotots(o)->tsv.len));

-      break;

-    }

-    case LUA_TUSERDATA: {

-      luaM_free(L, o, sizeudata(gcotou(o)->uv.len));

-      break;

-    }

-    default: lua_assert(0);

-  }

-}

-

-

-static int sweeplist (lua_State *L, GCObject **p, int limit) {

-  GCObject *curr;

-  int count = 0;  /* number of collected items */

-  while ((curr = *p) != NULL) {

-    if (curr->gch.marked > limit) {

-      unmark(curr);

-      p = &curr->gch.next;

-    }

-    else {

-      count++;

-      *p = curr->gch.next;

-      freeobj(L, curr);

-    }

-  }

-  return count;

-}

-

-

-static void sweepstrings (lua_State *L, int all) {

-  int i;

-  for (i=0; i<G(L)->strt.size; i++) {  /* for each list */

-    G(L)->strt.nuse -= sweeplist(L, &G(L)->strt.hash[i], all);

-  }

-}

-

-

-static void checkSizes (lua_State *L) {

-  /* check size of string hash */

-  if (G(L)->strt.nuse < cast(ls_nstr, G(L)->strt.size/4) &&

-      G(L)->strt.size > MINSTRTABSIZE*2)

-    luaS_resize(L, G(L)->strt.size/2);  /* table is too big */

-  /* check size of buffer */

-  if (luaZ_sizebuffer(&G(L)->buff) > LUA_MINBUFFER*2) {  /* buffer too big? */

-    size_t newsize = luaZ_sizebuffer(&G(L)->buff) / 2;

-    luaZ_resizebuffer(L, &G(L)->buff, newsize);

-  }

-  G(L)->GCthreshold = 2*G(L)->nblocks;  /* new threshold */

-}

-

-

-static void do1gcTM (lua_State *L, Udata *udata) {

-  const TObject *tm = fasttm(L, udata->uv.metatable, TM_GC);

-  if (tm != NULL) {

-    setobj2s(L->top, tm);

-    setuvalue(L->top+1, udata);

-    L->top += 2;

-    luaD_call(L, L->top - 2, 0);

-  }

-}

-

-

-void luaC_callGCTM (lua_State *L) {

-  lu_byte oldah = L->allowhook;

-  L->allowhook = 0;  /* stop debug hooks during GC tag methods */

-  L->top++;  /* reserve space to keep udata while runs its gc method */

-  while (G(L)->tmudata != NULL) {

-    GCObject *o = G(L)->tmudata;

-    Udata *udata = gcotou(o);

-    G(L)->tmudata = udata->uv.next;  /* remove udata from `tmudata' */

-    udata->uv.next = G(L)->rootudata;  /* return it to `root' list */

-    G(L)->rootudata = o;

-    setuvalue(L->top - 1, udata);  /* keep a reference to it */

-    unmark(o);

-    markfinalized(udata);

-    do1gcTM(L, udata);

-  }

-  L->top--;

-  L->allowhook = oldah;  /* restore hooks */

-}

-

-

-void luaC_sweep (lua_State *L, int all) {

-  if (all) all = 256;  /* larger than any mark */

-  sweeplist(L, &G(L)->rootudata, all);

-  sweepstrings(L, all);

-  sweeplist(L, &G(L)->rootgc, all);

-}

-

-

-/* mark root set */

-static void markroot (GCState *st, lua_State *L) {

-  global_State *g = st->g;

-  markobject(st, defaultmeta(L));

-  markobject(st, registry(L));

-  traversestack(st, g->mainthread);

-  if (L != g->mainthread)  /* another thread is running? */

-    markvalue(st, L);  /* cannot collect it */

-}

-

-

-static void mark (lua_State *L) {

-  GCState st;

-  GCObject *wkv;

-  st.g = G(L);

-  st.tmark = NULL;

-  st.wkv = st.wk = st.wv = NULL;

-  markroot(&st, L);

-  propagatemarks(&st);  /* mark all reachable objects */

-  cleartablevalues(st.wkv);

-  cleartablevalues(st.wv);

-  wkv = st.wkv;  /* keys must be cleared after preserving udata */

-  st.wkv = NULL;

-  st.wv = NULL;

-  luaC_separateudata(L);  /* separate userdata to be preserved */

-  marktmu(&st);  /* mark `preserved' userdata */

-  propagatemarks(&st);  /* remark, to propagate `preserveness' */

-  cleartablekeys(wkv);

-  /* `propagatemarks' may resuscitate some weak tables; clear them too */

-  cleartablekeys(st.wk);

-  cleartablevalues(st.wv);

-  cleartablekeys(st.wkv);

-  cleartablevalues(st.wkv);

-}

-

-

-void luaC_collectgarbage (lua_State *L) {

-  mark(L);

-  luaC_sweep(L, 0);

-  checkSizes(L);

-  luaC_callGCTM(L);

-}

-

-

-void luaC_link (lua_State *L, GCObject *o, lu_byte tt) {

-  o->gch.next = G(L)->rootgc;

-  G(L)->rootgc = o;

-  o->gch.marked = 0;

-  o->gch.tt = tt;

-}

-

+/*
+** $Id: lgc.c,v 1.4 2004-11-27 21:46:07 pixel Exp $
+** Garbage Collector
+** See Copyright Notice in lua.h
+*/
+
+#include <string.h>
+
+#define lgc_c
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lgc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+
+
+typedef struct GCState {
+  GCObject *tmark;  /* list of marked objects to be traversed */
+  GCObject *wk;  /* list of traversed key-weak tables (to be cleared) */
+  GCObject *wv;  /* list of traversed value-weak tables */
+  GCObject *wkv;  /* list of traversed key-value weak tables */
+  global_State *g;
+} GCState;
+
+
+/*
+** some userful bit tricks
+*/
+#define setbit(x,b)	((x) |= (1<<(b)))
+#define resetbit(x,b)	((x) &= cast(lu_byte, ~(1<<(b))))
+#define testbit(x,b)	((x) & (1<<(b)))
+
+#define unmark(x)	resetbit((x)->gch.marked, 0)
+#define ismarked(x)	((x)->gch.marked & ((1<<4)|1))
+
+#define stringmark(s)	setbit((s)->tsv.marked, 0)
+
+
+#define isfinalized(u)		(!testbit((u)->uv.marked, 1))
+#define markfinalized(u)	resetbit((u)->uv.marked, 1)
+
+
+#define KEYWEAKBIT    1
+#define VALUEWEAKBIT  2
+#define KEYWEAK         (1<<KEYWEAKBIT)
+#define VALUEWEAK       (1<<VALUEWEAKBIT)
+
+
+
+#define markobject(st,o) { checkconsistency(o); \
+  if (iscollectable(o) && !ismarked(gcvalue(o))) reallymarkobject(st,gcvalue(o)); }
+
+#define condmarkobject(st,o,c) { checkconsistency(o); \
+  if (iscollectable(o) && !ismarked(gcvalue(o)) && (c)) \
+    reallymarkobject(st,gcvalue(o)); }
+
+#define markvalue(st,t) { if (!ismarked(valtogco(t))) \
+		reallymarkobject(st, valtogco(t)); }
+
+
+
+static void reallymarkobject (GCState *st, GCObject *o) {
+  lua_assert(!ismarked(o));
+  setbit(o->gch.marked, 0);  /* mark object */
+  switch (o->gch.tt) {
+    case LUA_TUSERDATA: {
+      markvalue(st, gcotou(o)->uv.metatable);
+      break;
+    }
+    case LUA_TFUNCTION: {
+      gcotocl(o)->c.gclist = st->tmark;
+      st->tmark = o;
+      break;
+    }
+    case LUA_TTABLE: {
+      gcotoh(o)->gclist = st->tmark;
+      st->tmark = o;
+      break;
+    }
+    case LUA_TTHREAD: {
+      gcototh(o)->gclist = st->tmark;
+      st->tmark = o;
+      break;
+    }
+    case LUA_TPROTO: {
+      gcotop(o)->gclist = st->tmark;
+      st->tmark = o;
+      break;
+    }
+    default: lua_assert(o->gch.tt == LUA_TSTRING);
+  }
+}
+
+
+static void marktmu (GCState *st) {
+  GCObject *u;
+  for (u = st->g->tmudata; u; u = u->gch.next) {
+    unmark(u);  /* may be marked, if left from previous GC */
+    reallymarkobject(st, u);
+  }
+}
+
+
+/* move `dead' udata that need finalization to list `tmudata' */
+void luaC_separateudata (lua_State *L) {
+  GCObject **p = &G(L)->rootudata;
+  GCObject *curr;
+  GCObject *collected = NULL;  /* to collect udata with gc event */
+  GCObject **lastcollected = &collected;
+  while ((curr = *p) != NULL) {
+    lua_assert(curr->gch.tt == LUA_TUSERDATA);
+    if (ismarked(curr) || isfinalized(gcotou(curr)))
+      p = &curr->gch.next;  /* don't bother with them */
+
+    else if (fasttm(L, gcotou(curr)->uv.metatable, TM_GC) == NULL) {
+      markfinalized(gcotou(curr));  /* don't need finalization */
+      p = &curr->gch.next;
+    }
+    else {  /* must call its gc method */
+      *p = curr->gch.next;
+      curr->gch.next = NULL;  /* link `curr' at the end of `collected' list */
+      *lastcollected = curr;
+      lastcollected = &curr->gch.next;
+    }
+  }
+  /* insert collected udata with gc event into `tmudata' list */
+  *lastcollected = G(L)->tmudata;
+  G(L)->tmudata = collected;
+}
+
+
+static void removekey (Node *n) {
+  setnilvalue(gval(n));  /* remove corresponding value ... */
+  if (iscollectable(gkey(n)))
+    setttype(gkey(n), LUA_TNONE);  /* dead key; remove it */
+}
+
+
+static void traversetable (GCState *st, Table *h) {
+  int i;
+  int weakkey = 0;
+  int weakvalue = 0;
+  const TObject *mode;
+  markvalue(st, h->metatable);
+  lua_assert(h->lsizenode || h->node == st->g->dummynode);
+  mode = gfasttm(st->g, h->metatable, TM_MODE);
+  if (mode && ttisstring(mode)) {  /* is there a weak mode? */
+    weakkey = (strchr(svalue(mode), 'k') != NULL);
+    weakvalue = (strchr(svalue(mode), 'v') != NULL);
+    if (weakkey || weakvalue) {  /* is really weak? */
+      GCObject **weaklist;
+      h->marked &= ~(KEYWEAK | VALUEWEAK);  /* clear bits */
+      h->marked |= cast(lu_byte, (weakkey << KEYWEAKBIT) |
+                                 (weakvalue << VALUEWEAKBIT));
+      weaklist = (weakkey && weakvalue) ? &st->wkv :
+                              (weakkey) ? &st->wk :
+                                          &st->wv;
+      h->gclist = *weaklist;  /* must be cleared after GC, ... */
+      *weaklist = valtogco(h);  /* ... so put in the appropriate list */
+    }
+  }
+  if (!weakvalue) {
+    i = h->sizearray;
+    while (i--)
+      markobject(st, &h->array[i]);
+  }
+  i = sizenode(h);
+  while (i--) {
+    Node *n = gnode(h, i);
+    if (!ttisnil(gval(n))) {
+      lua_assert(!ttisnil(gkey(n)));
+      condmarkobject(st, gkey(n), !weakkey);
+      condmarkobject(st, gval(n), !weakvalue);
+    }
+  }
+}
+
+
+static void traverseproto (GCState *st, Proto *f) {
+  int i;
+  stringmark(f->source);
+  for (i=0; i<f->sizek; i++) {  /* mark literal strings */
+    if (ttisstring(f->k+i))
+      stringmark(tsvalue(f->k+i));
+  }
+  for (i=0; i<f->sizeupvalues; i++)  /* mark upvalue names */
+    stringmark(f->upvalues[i]);
+  for (i=0; i<f->sizep; i++)  /* mark nested protos */
+    markvalue(st, f->p[i]);
+  for (i=0; i<f->sizelocvars; i++)  /* mark local-variable names */
+    stringmark(f->locvars[i].varname);
+  lua_assert(luaG_checkcode(f));
+}
+
+
+
+static void traverseclosure (GCState *st, Closure *cl) {
+  if (cl->c.isC) {
+    int i;
+    for (i=0; i<cl->c.nupvalues; i++)  /* mark its upvalues */
+      markobject(st, &cl->c.upvalue[i]);
+  }
+  else {
+    int i;
+    lua_assert(cl->l.nupvalues == cl->l.p->nups);
+    markvalue(st, hvalue(&cl->l.g));
+    markvalue(st, cl->l.p);
+    for (i=0; i<cl->l.nupvalues; i++) {  /* mark its upvalues */
+      UpVal *u = cl->l.upvals[i];
+      if (!u->marked) {
+        markobject(st, &u->value);
+        u->marked = 1;
+      }
+    }
+  }
+}
+
+
+static void checkstacksizes (lua_State *L, StkId max) {
+  int used = L->ci - L->base_ci;  /* number of `ci' in use */
+  if (4*used < L->size_ci && 2*BASIC_CI_SIZE < L->size_ci)
+    luaD_reallocCI(L, L->size_ci/2);  /* still big enough... */
+  else condhardstacktests(luaD_reallocCI(L, L->size_ci));
+  used = max - L->stack;  /* part of stack in use */
+  if (4*used < L->stacksize && 2*(BASIC_STACK_SIZE+EXTRA_STACK) < L->stacksize)
+    luaD_reallocstack(L, L->stacksize/2);  /* still big enough... */
+  else condhardstacktests(luaD_reallocstack(L, L->stacksize));
+}
+
+
+static void traversestack (GCState *st, lua_State *L1) {
+  StkId o, lim;
+  CallInfo *ci;
+  markobject(st, gt(L1));
+  lim = L1->top;
+  for (ci = L1->base_ci; ci <= L1->ci; ci++) {
+    lua_assert(ci->top <= L1->stack_last);
+    lua_assert(ci->state & (CI_C | CI_HASFRAME | CI_SAVEDPC));
+    if (!(ci->state & CI_C) && lim < ci->top)
+      lim = ci->top;
+  }
+  for (o = L1->stack; o < L1->top; o++)
+    markobject(st, o);
+  for (; o <= lim; o++)
+    setnilvalue(o);
+  checkstacksizes(L1, lim);
+}
+
+
+static void propagatemarks (GCState *st) {
+  while (st->tmark) {  /* traverse marked objects */
+    switch (st->tmark->gch.tt) {
+      case LUA_TTABLE: {
+        Table *h = gcotoh(st->tmark);
+        st->tmark = h->gclist;
+        traversetable(st, h);
+        break;
+      }
+      case LUA_TFUNCTION: {
+        Closure *cl = gcotocl(st->tmark);
+        st->tmark = cl->c.gclist;
+        traverseclosure(st, cl);
+        break;
+      }
+      case LUA_TTHREAD: {
+        lua_State *th = gcototh(st->tmark);
+        st->tmark = th->gclist;
+        traversestack(st, th);
+        break;
+      }
+      case LUA_TPROTO: {
+        Proto *p = gcotop(st->tmark);
+        st->tmark = p->gclist;
+        traverseproto(st, p);
+        break;
+      }
+      default: lua_assert(0);
+    }
+  }
+}
+
+
+static int valismarked (const TObject *o) {
+  if (ttisstring(o))
+    stringmark(tsvalue(o));  /* strings are `values', so are never weak */
+  return !iscollectable(o) || testbit(o->value.gc->gch.marked, 0);
+}
+
+
+/*
+** clear collected keys from weaktables
+*/
+static void cleartablekeys (GCObject *l) {
+  while (l) {
+    Table *h = gcotoh(l);
+    int i = sizenode(h);
+    lua_assert(h->marked & KEYWEAK);
+    while (i--) {
+      Node *n = gnode(h, i);
+      if (!valismarked(gkey(n)))  /* key was collected? */
+        removekey(n);  /* remove entry from table */
+    }
+    l = h->gclist;
+  }
+}
+
+
+/*
+** clear collected values from weaktables
+*/
+static void cleartablevalues (GCObject *l) {
+  while (l) {
+    Table *h = gcotoh(l);
+    int i = h->sizearray;
+    lua_assert(h->marked & VALUEWEAK);
+    while (i--) {
+      TObject *o = &h->array[i];
+      if (!valismarked(o))  /* value was collected? */
+        setnilvalue(o);  /* remove value */
+    }
+    i = sizenode(h);
+    while (i--) {
+      Node *n = gnode(h, i);
+      if (!valismarked(gval(n)))  /* value was collected? */
+        removekey(n);  /* remove entry from table */
+    }
+    l = h->gclist;
+  }
+}
+
+
+static void freeobj (lua_State *L, GCObject *o) {
+  switch (o->gch.tt) {
+    case LUA_TPROTO: luaF_freeproto(L, gcotop(o)); break;
+    case LUA_TFUNCTION: luaF_freeclosure(L, gcotocl(o)); break;
+    case LUA_TUPVAL: luaM_freelem(L, gcotouv(o)); break;
+    case LUA_TTABLE: luaH_free(L, gcotoh(o)); break;
+    case LUA_TTHREAD: {
+      lua_assert(gcototh(o) != L && gcototh(o) != G(L)->mainthread);
+      luaE_freethread(L, gcototh(o));
+      break;
+    }
+    case LUA_TSTRING: {
+      luaM_free(L, o, sizestring(gcotots(o)->tsv.len));
+      break;
+    }
+    case LUA_TUSERDATA: {
+      luaM_free(L, o, sizeudata(gcotou(o)->uv.len));
+      break;
+    }
+    default: lua_assert(0);
+  }
+}
+
+
+static int sweeplist (lua_State *L, GCObject **p, int limit) {
+  GCObject *curr;
+  int count = 0;  /* number of collected items */
+  while ((curr = *p) != NULL) {
+    if (curr->gch.marked > limit) {
+      unmark(curr);
+      p = &curr->gch.next;
+    }
+    else {
+      count++;
+      *p = curr->gch.next;
+      freeobj(L, curr);
+    }
+  }
+  return count;
+}
+
+
+static void sweepstrings (lua_State *L, int all) {
+  int i;
+  for (i=0; i<G(L)->strt.size; i++) {  /* for each list */
+    G(L)->strt.nuse -= sweeplist(L, &G(L)->strt.hash[i], all);
+  }
+}
+
+
+static void checkSizes (lua_State *L) {
+  /* check size of string hash */
+  if (G(L)->strt.nuse < cast(ls_nstr, G(L)->strt.size/4) &&
+      G(L)->strt.size > MINSTRTABSIZE*2)
+    luaS_resize(L, G(L)->strt.size/2);  /* table is too big */
+  /* check size of buffer */
+  if (luaZ_sizebuffer(&G(L)->buff) > LUA_MINBUFFER*2) {  /* buffer too big? */
+    size_t newsize = luaZ_sizebuffer(&G(L)->buff) / 2;
+    luaZ_resizebuffer(L, &G(L)->buff, newsize);
+  }
+  G(L)->GCthreshold = 2*G(L)->nblocks;  /* new threshold */
+}
+
+
+static void do1gcTM (lua_State *L, Udata *udata) {
+  const TObject *tm = fasttm(L, udata->uv.metatable, TM_GC);
+  if (tm != NULL) {
+    setobj2s(L->top, tm);
+    setuvalue(L->top+1, udata);
+    L->top += 2;
+    luaD_call(L, L->top - 2, 0);
+  }
+}
+
+
+void luaC_callGCTM (lua_State *L) {
+  lu_byte oldah = L->allowhook;
+  L->allowhook = 0;  /* stop debug hooks during GC tag methods */
+  L->top++;  /* reserve space to keep udata while runs its gc method */
+  while (G(L)->tmudata != NULL) {
+    GCObject *o = G(L)->tmudata;
+    Udata *udata = gcotou(o);
+    G(L)->tmudata = udata->uv.next;  /* remove udata from `tmudata' */
+    udata->uv.next = G(L)->rootudata;  /* return it to `root' list */
+    G(L)->rootudata = o;
+    setuvalue(L->top - 1, udata);  /* keep a reference to it */
+    unmark(o);
+    markfinalized(udata);
+    do1gcTM(L, udata);
+  }
+  L->top--;
+  L->allowhook = oldah;  /* restore hooks */
+}
+
+
+void luaC_sweep (lua_State *L, int all) {
+  if (all) all = 256;  /* larger than any mark */
+  sweeplist(L, &G(L)->rootudata, all);
+  sweepstrings(L, all);
+  sweeplist(L, &G(L)->rootgc, all);
+}
+
+
+/* mark root set */
+static void markroot (GCState *st, lua_State *L) {
+  global_State *g = st->g;
+  markobject(st, defaultmeta(L));
+  markobject(st, registry(L));
+  traversestack(st, g->mainthread);
+  if (L != g->mainthread)  /* another thread is running? */
+    markvalue(st, L);  /* cannot collect it */
+}
+
+
+static void mark (lua_State *L) {
+  GCState st;
+  GCObject *wkv;
+  st.g = G(L);
+  st.tmark = NULL;
+  st.wkv = st.wk = st.wv = NULL;
+  markroot(&st, L);
+  propagatemarks(&st);  /* mark all reachable objects */
+  cleartablevalues(st.wkv);
+  cleartablevalues(st.wv);
+  wkv = st.wkv;  /* keys must be cleared after preserving udata */
+  st.wkv = NULL;
+  st.wv = NULL;
+  luaC_separateudata(L);  /* separate userdata to be preserved */
+  marktmu(&st);  /* mark `preserved' userdata */
+  propagatemarks(&st);  /* remark, to propagate `preserveness' */
+  cleartablekeys(wkv);
+  /* `propagatemarks' may resuscitate some weak tables; clear them too */
+  cleartablekeys(st.wk);
+  cleartablevalues(st.wv);
+  cleartablekeys(st.wkv);
+  cleartablevalues(st.wkv);
+}
+
+
+void luaC_collectgarbage (lua_State *L) {
+  mark(L);
+  luaC_sweep(L, 0);
+  checkSizes(L);
+  luaC_callGCTM(L);
+}
+
+
+void luaC_link (lua_State *L, GCObject *o, lu_byte tt) {
+  o->gch.next = G(L)->rootgc;
+  G(L)->rootgc = o;
+  o->gch.marked = 0;
+  o->gch.tt = tt;
+}
+
diff --git a/lib/lua/src/llex.c b/lib/lua/src/llex.c
index 6382cce..ff88f92 100644
--- a/lib/lua/src/llex.c
+++ b/lib/lua/src/llex.c
@@ -1,442 +1,442 @@
-/*

-** $Id: llex.c,v 1.4 2004-11-27 21:35:20 pixel Exp $

-** Lexical Analyzer

-** See Copyright Notice in lua.h

-*/

-

-

-#include <ctype.h>

-#include <string.h>

-

-#define llex_c

-

-#include "lua.h"

-

-#include "ldo.h"

-#include "llex.h"

-#include "lobject.h"

-#include "lparser.h"

-#include "lstate.h"

-#include "lstring.h"

-#include "lzio.h"

-

-

-

-#define next(LS) (LS->current = zgetc(LS->z))

-

-

-

-/* ORDER RESERVED */

-static const char *const token2string [] = {

-    "and", "break", "do", "else", "elseif",

-    "end", "false", "for", "function", "if",

-    "in", "local", "nil", "not", "or", "repeat",

-    "return", "then", "true", "until", "while", "*name",

-    "..", "...", "==", ">=", "<=", "~=",

-    "*number", "*string", "<eof>"

-};

-

-

-void luaX_init (lua_State *L) {

-  int i;

-  for (i=0; i<NUM_RESERVED; i++) {

-    TString *ts = luaS_new(L, token2string[i]);

-    luaS_fix(ts);  /* reserved words are never collected */

-    lua_assert(strlen(token2string[i])+1 <= TOKEN_LEN);

-    ts->tsv.reserved = cast(lu_byte, i+1);  /* reserved word */

-  }

-}

-

-

-#define MAXSRC          80

-

-

-void luaX_checklimit (LexState *ls, int val, int limit, const char *msg) {

-  if (val > limit) {

-    msg = luaO_pushfstring(ls->L, "too many %s (limit=%d)", msg, limit);

-    luaX_syntaxerror(ls, msg);

-  }

-}

-

-

-void luaX_errorline (LexState *ls, const char *s, const char *token, int line) {

-  lua_State *L = ls->L;

-  char buff[MAXSRC];

-  luaO_chunkid(buff, getstr(ls->source), MAXSRC);

-  luaO_pushfstring(L, "%s:%d: %s near `%s'", buff, line, s, token); 

-  luaD_throw(L, LUA_ERRSYNTAX);

-}

-

-

-static void luaX_error (LexState *ls, const char *s, const char *token) {

-  luaX_errorline(ls, s, token, ls->linenumber);

-}

-

-

-void luaX_syntaxerror (LexState *ls, const char *msg) {

-  const char *lasttoken;

-  switch (ls->t.token) {

-    case TK_NAME:

-      lasttoken = getstr(ls->t.seminfo.ts);

-      break;

-    case TK_STRING:

-    case TK_NUMBER:

-      lasttoken = luaZ_buffer(ls->buff);

-      break;

-    default:

-      lasttoken = luaX_token2str(ls, ls->t.token);

-      break;

-  }

-  luaX_error(ls, msg, lasttoken);

-}

-

-

-const char *luaX_token2str (LexState *ls, int token) {

-  if (token < FIRST_RESERVED) {

-    lua_assert(token == (unsigned char)token);

-    return luaO_pushfstring(ls->L, "%c", token);

-  }

-  else

-    return token2string[token-FIRST_RESERVED];

-}

-

-

-static void luaX_lexerror (LexState *ls, const char *s, int token) {

-  if (token == TK_EOS)

-    luaX_error(ls, s, luaX_token2str(ls, token));

-  else

-    luaX_error(ls, s, luaZ_buffer(ls->buff));

-}

-

-

-static void inclinenumber (LexState *LS) {

-  next(LS);  /* skip `\n' */

-  ++LS->linenumber;

-  luaX_checklimit(LS, LS->linenumber, MAX_INT, "lines in a chunk");

-}

-

-

-void luaX_setinput (lua_State *L, LexState *LS, ZIO *z, TString *source) {

-  LS->L = L;

-  LS->lookahead.token = TK_EOS;  /* no look-ahead token */

-  LS->z = z;

-  LS->fs = NULL;

-  LS->linenumber = 1;

-  LS->lastline = 1;

-  LS->source = source;

-  next(LS);  /* read first char */

-  if (LS->current == '#') {

-    do {  /* skip first line */

-      next(LS);

-    } while (LS->current != '\n' && LS->current != EOZ);

-  }

-}

-

-

-

-/*

-** =======================================================

-** LEXICAL ANALYZER

-** =======================================================

-*/

-

-

-/* use buffer to store names, literal strings and numbers */

-

-/* extra space to allocate when growing buffer */

-#define EXTRABUFF	32

-

-/* maximum number of chars that can be read without checking buffer size */

-#define MAXNOCHECK	5

-

-#define checkbuffer(LS, len)	\

-    if (((len)+MAXNOCHECK)*sizeof(char) > luaZ_sizebuffer((LS)->buff)) \

-      luaZ_openspace((LS)->L, (LS)->buff, (len)+EXTRABUFF)

-

-#define save(LS, c, l) \

-	(luaZ_buffer((LS)->buff)[l++] = cast(char, c))

-#define save_and_next(LS, l)  (save(LS, LS->current, l), next(LS))

-

-

-static size_t readname (LexState *LS) {

-  size_t l = 0;

-  checkbuffer(LS, l);

-  do {

-    checkbuffer(LS, l);

-    save_and_next(LS, l);

-  } while (isalnum(LS->current) || LS->current == '_');

-  save(LS, '\0', l);

-  return l-1;

-}

-

-

-/* LUA_NUMBER */

-static void read_numeral (LexState *LS, int comma, SemInfo *seminfo) {

-  int oct = 0, hex = 0;

-  size_t l = 0;

-  checkbuffer(LS, l);

-  if (comma) save(LS, '.', l);

-  else if (LS->current == '0') {

-    oct = 1;

-    checkbuffer(LS, 1);

-    save_and_next(LS, l);

-    if (LS->current == 'x') {

-      oct = 0;

-      hex = 1;

-      checkbuffer(LS, 1);

-      save_and_next(LS, l);

-    }

-  }

-  while (isdigit(LS->current) || (hex && isxdigit(LS->current))) {

-    checkbuffer(LS, l);

-    save_and_next(LS, l);

-  }

-  checkbuffer(LS, 1);

-  if (LS->current == '.') {

-    save_and_next(LS, l);

-    if (hex || oct) {

-      save(LS, '\0', l);

-      luaX_lexerror(LS,

-	            "error in number, mixing decimal point with octal or hexadecimal",

-	            TK_NUMBER);

-    }

-    if (LS->current == '.') {

-      save_and_next(LS, l);

-      save(LS, '\0', l);

-      luaX_lexerror(LS,

-                 "ambiguous syntax (decimal point x string concatenation)",

-                 TK_NUMBER);

-    }

-  }

-  while (isdigit(LS->current)) {

-    checkbuffer(LS, l);

-    save_and_next(LS, l);

-  }

-  if (LS->current == 'e' || LS->current == 'E') {

-    save_and_next(LS, l);  /* read `E' */

-    if (hex || oct) {

-      save(LS, '\0', l);

-      luaX_lexerror(LS,

-	            "error in number, mixing exponential with octal or hexadecimal",

-	            TK_NUMBER);

-    }

-    if (LS->current == '+' || LS->current == '-')

-      save_and_next(LS, l);  /* optional exponent sign */

-    while (isdigit(LS->current)) {

-      checkbuffer(LS, l);

-      save_and_next(LS, l);

-    }

-  }

-  save(LS, '\0', l);

-  if (!luaO_str2d(luaZ_buffer(LS->buff), &seminfo->r))

-    luaX_lexerror(LS, "malformed number", TK_NUMBER);

-}

-

-

-static void read_long_string (LexState *LS, SemInfo *seminfo) {

-  int cont = 0;

-  size_t l = 0;

-  checkbuffer(LS, l);

-  save(LS, '[', l);  /* save first `[' */

-  save_and_next(LS, l);  /* pass the second `[' */

-  if (LS->current == '\n')  /* string starts with a newline? */

-    inclinenumber(LS);  /* skip it */

-  for (;;) {

-    checkbuffer(LS, l);

-    switch (LS->current) {

-      case EOZ:

-        save(LS, '\0', l);

-        luaX_lexerror(LS, (seminfo) ? "unfinished long string" :

-                                   "unfinished long comment", TK_EOS);

-        break;  /* to avoid warnings */

-      case '[':

-        save_and_next(LS, l);

-        if (LS->current == '[') {

-          cont++;

-          save_and_next(LS, l);

-        }

-        continue;

-      case ']':

-        save_and_next(LS, l);

-        if (LS->current == ']') {

-          if (cont == 0) goto endloop;

-          cont--;

-          save_and_next(LS, l);

-        }

-        continue;

-      case '\n':

-        save(LS, '\n', l);

-        inclinenumber(LS);

-        if (!seminfo) l = 0;  /* reset buffer to avoid wasting space */

-        continue;

-      default:

-        save_and_next(LS, l);

-    }

-  } endloop:

-  save_and_next(LS, l);  /* skip the second `]' */

-  save(LS, '\0', l);

-  if (seminfo)

-    seminfo->ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff) + 2, l - 5);

-}

-

-

-static void read_string (LexState *LS, int del, SemInfo *seminfo) {

-  size_t l = 0;

-  checkbuffer(LS, l);

-  save_and_next(LS, l);

-  while (LS->current != del) {

-    checkbuffer(LS, l);

-    switch (LS->current) {

-      case EOZ:

-        save(LS, '\0', l);

-        luaX_lexerror(LS, "unfinished string", TK_EOS);

-        break;  /* to avoid warnings */

-      case '\n':

-        save(LS, '\0', l);

-        luaX_lexerror(LS, "unfinished string", TK_STRING);

-        break;  /* to avoid warnings */

-      case '\\':

-        next(LS);  /* do not save the `\' */

-        switch (LS->current) {

-          case 'a': save(LS, '\a', l); next(LS); break;

-          case 'b': save(LS, '\b', l); next(LS); break;

-          case 'f': save(LS, '\f', l); next(LS); break;

-          case 'n': save(LS, '\n', l); next(LS); break;

-          case 'r': save(LS, '\r', l); next(LS); break;

-          case 't': save(LS, '\t', l); next(LS); break;

-          case 'v': save(LS, '\v', l); next(LS); break;

-          case '\n': save(LS, '\n', l); inclinenumber(LS); break;

-          case EOZ: break;  /* will raise an error next loop */

-          default: {

-            if (!isdigit(LS->current))

-              save_and_next(LS, l);  /* handles \\, \", \', and \? */

-            else {  /* \xxx */

-              int c = 0;

-              int i = 0;

-              do {

-                c = 10*c + (LS->current-'0');

-                next(LS);

-              } while (++i<3 && isdigit(LS->current));

-              if (c > UCHAR_MAX) {

-                save(LS, '\0', l);

-                luaX_lexerror(LS, "escape sequence too large", TK_STRING);

-              }

-              save(LS, c, l);

-            }

-          }

-        }

-        break;

-      default:

-        save_and_next(LS, l);

-    }

-  }

-  save_and_next(LS, l);  /* skip delimiter */

-  save(LS, '\0', l);

-  seminfo->ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff) + 1, l - 3);

-}

-

-

-int luaX_lex (LexState *LS, SemInfo *seminfo) {

-  for (;;) {

-    switch (LS->current) {

-

-      case '\n': {

-        inclinenumber(LS);

-        continue;

-      }

-      case '-': {

-        next(LS);

-        if (LS->current != '-') return '-';

-        /* else is a comment */

-        next(LS);

-        if (LS->current == '[' && (next(LS), LS->current == '['))

-          read_long_string(LS, NULL);  /* long comment */

-        else  /* short comment */

-          while (LS->current != '\n' && LS->current != EOZ)

-            next(LS);

-        continue;

-      }

-      case '[': {

-        next(LS);

-        if (LS->current != '[') return '[';

-        else {

-          read_long_string(LS, seminfo);

-          return TK_STRING;

-        }

-      }

-      case '=': {

-        next(LS);

-        if (LS->current != '=') return '=';

-        else { next(LS); return TK_EQ; }

-      }

-      case '<': {

-        next(LS);

-        if (LS->current != '=') return '<';

-        else { next(LS); return TK_LE; }

-      }

-      case '>': {

-        next(LS);

-        if (LS->current != '=') return '>';

-        else { next(LS); return TK_GE; }

-      }

-      case '~': {

-        next(LS);

-        if (LS->current != '=') return '~';

-        else { next(LS); return TK_NE; }

-      }

-      case '"':

-      case '\'': {

-        read_string(LS, LS->current, seminfo);

-        return TK_STRING;

-      }

-      case '.': {

-        next(LS);

-        if (LS->current == '.') {

-          next(LS);

-          if (LS->current == '.') {

-            next(LS);

-            return TK_DOTS;   /* ... */

-          }

-          else return TK_CONCAT;   /* .. */

-        }

-        else if (!isdigit(LS->current)) return '.';

-        else {

-          read_numeral(LS, 1, seminfo);

-          return TK_NUMBER;

-        }

-      }

-      case EOZ: {

-        return TK_EOS;

-      }

-      default: {

-        if (isspace(LS->current)) {

-          next(LS);

-          continue;

-        }

-        else if (isdigit(LS->current)) {

-          read_numeral(LS, 0, seminfo);

-          return TK_NUMBER;

-        }

-        else if (isalpha(LS->current) || LS->current == '_') {

-          /* identifier or reserved word */

-          size_t l = readname(LS);

-          TString *ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff), l);

-          if (ts->tsv.reserved > 0)  /* reserved word? */

-            return ts->tsv.reserved - 1 + FIRST_RESERVED;

-          seminfo->ts = ts;

-          return TK_NAME;

-        }

-        else {

-          int c = LS->current;

-          if (iscntrl(c))

-            luaX_error(LS, "invalid control char",

-                           luaO_pushfstring(LS->L, "char(%d)", c));

-          next(LS);

-          return c;  /* single-char tokens (+ - / ...) */

-        }

-      }

-    }

-  }

-}

-

-#undef next

+/*
+** $Id: llex.c,v 1.5 2004-11-27 21:46:07 pixel Exp $
+** Lexical Analyzer
+** See Copyright Notice in lua.h
+*/
+
+
+#include <ctype.h>
+#include <string.h>
+
+#define llex_c
+
+#include "lua.h"
+
+#include "ldo.h"
+#include "llex.h"
+#include "lobject.h"
+#include "lparser.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "lzio.h"
+
+
+
+#define next(LS) (LS->current = zgetc(LS->z))
+
+
+
+/* ORDER RESERVED */
+static const char *const token2string [] = {
+    "and", "break", "do", "else", "elseif",
+    "end", "false", "for", "function", "if",
+    "in", "local", "nil", "not", "or", "repeat",
+    "return", "then", "true", "until", "while", "*name",
+    "..", "...", "==", ">=", "<=", "~=",
+    "*number", "*string", "<eof>"
+};
+
+
+void luaX_init (lua_State *L) {
+  int i;
+  for (i=0; i<NUM_RESERVED; i++) {
+    TString *ts = luaS_new(L, token2string[i]);
+    luaS_fix(ts);  /* reserved words are never collected */
+    lua_assert(strlen(token2string[i])+1 <= TOKEN_LEN);
+    ts->tsv.reserved = cast(lu_byte, i+1);  /* reserved word */
+  }
+}
+
+
+#define MAXSRC          80
+
+
+void luaX_checklimit (LexState *ls, int val, int limit, const char *msg) {
+  if (val > limit) {
+    msg = luaO_pushfstring(ls->L, "too many %s (limit=%d)", msg, limit);
+    luaX_syntaxerror(ls, msg);
+  }
+}
+
+
+void luaX_errorline (LexState *ls, const char *s, const char *token, int line) {
+  lua_State *L = ls->L;
+  char buff[MAXSRC];
+  luaO_chunkid(buff, getstr(ls->source), MAXSRC);
+  luaO_pushfstring(L, "%s:%d: %s near `%s'", buff, line, s, token); 
+  luaD_throw(L, LUA_ERRSYNTAX);
+}
+
+
+static void luaX_error (LexState *ls, const char *s, const char *token) {
+  luaX_errorline(ls, s, token, ls->linenumber);
+}
+
+
+void luaX_syntaxerror (LexState *ls, const char *msg) {
+  const char *lasttoken;
+  switch (ls->t.token) {
+    case TK_NAME:
+      lasttoken = getstr(ls->t.seminfo.ts);
+      break;
+    case TK_STRING:
+    case TK_NUMBER:
+      lasttoken = luaZ_buffer(ls->buff);
+      break;
+    default:
+      lasttoken = luaX_token2str(ls, ls->t.token);
+      break;
+  }
+  luaX_error(ls, msg, lasttoken);
+}
+
+
+const char *luaX_token2str (LexState *ls, int token) {
+  if (token < FIRST_RESERVED) {
+    lua_assert(token == (unsigned char)token);
+    return luaO_pushfstring(ls->L, "%c", token);
+  }
+  else
+    return token2string[token-FIRST_RESERVED];
+}
+
+
+static void luaX_lexerror (LexState *ls, const char *s, int token) {
+  if (token == TK_EOS)
+    luaX_error(ls, s, luaX_token2str(ls, token));
+  else
+    luaX_error(ls, s, luaZ_buffer(ls->buff));
+}
+
+
+static void inclinenumber (LexState *LS) {
+  next(LS);  /* skip `\n' */
+  ++LS->linenumber;
+  luaX_checklimit(LS, LS->linenumber, MAX_INT, "lines in a chunk");
+}
+
+
+void luaX_setinput (lua_State *L, LexState *LS, ZIO *z, TString *source) {
+  LS->L = L;
+  LS->lookahead.token = TK_EOS;  /* no look-ahead token */
+  LS->z = z;
+  LS->fs = NULL;
+  LS->linenumber = 1;
+  LS->lastline = 1;
+  LS->source = source;
+  next(LS);  /* read first char */
+  if (LS->current == '#') {
+    do {  /* skip first line */
+      next(LS);
+    } while (LS->current != '\n' && LS->current != EOZ);
+  }
+}
+
+
+
+/*
+** =======================================================
+** LEXICAL ANALYZER
+** =======================================================
+*/
+
+
+/* use buffer to store names, literal strings and numbers */
+
+/* extra space to allocate when growing buffer */
+#define EXTRABUFF	32
+
+/* maximum number of chars that can be read without checking buffer size */
+#define MAXNOCHECK	5
+
+#define checkbuffer(LS, len)	\
+    if (((len)+MAXNOCHECK)*sizeof(char) > luaZ_sizebuffer((LS)->buff)) \
+      luaZ_openspace((LS)->L, (LS)->buff, (len)+EXTRABUFF)
+
+#define save(LS, c, l) \
+	(luaZ_buffer((LS)->buff)[l++] = cast(char, c))
+#define save_and_next(LS, l)  (save(LS, LS->current, l), next(LS))
+
+
+static size_t readname (LexState *LS) {
+  size_t l = 0;
+  checkbuffer(LS, l);
+  do {
+    checkbuffer(LS, l);
+    save_and_next(LS, l);
+  } while (isalnum(LS->current) || LS->current == '_');
+  save(LS, '\0', l);
+  return l-1;
+}
+
+
+/* LUA_NUMBER */
+static void read_numeral (LexState *LS, int comma, SemInfo *seminfo) {
+  int oct = 0, hex = 0;
+  size_t l = 0;
+  checkbuffer(LS, l);
+  if (comma) save(LS, '.', l);
+  else if (LS->current == '0') {
+    oct = 1;
+    checkbuffer(LS, 1);
+    save_and_next(LS, l);
+    if (LS->current == 'x') {
+      oct = 0;
+      hex = 1;
+      checkbuffer(LS, 1);
+      save_and_next(LS, l);
+    }
+  }
+  while (isdigit(LS->current) || (hex && isxdigit(LS->current))) {
+    checkbuffer(LS, l);
+    save_and_next(LS, l);
+  }
+  checkbuffer(LS, 1);
+  if (LS->current == '.') {
+    save_and_next(LS, l);
+    if (hex || oct) {
+      save(LS, '\0', l);
+      luaX_lexerror(LS,
+	            "error in number, mixing decimal point with octal or hexadecimal",
+	            TK_NUMBER);
+    }
+    if (LS->current == '.') {
+      save_and_next(LS, l);
+      save(LS, '\0', l);
+      luaX_lexerror(LS,
+                 "ambiguous syntax (decimal point x string concatenation)",
+                 TK_NUMBER);
+    }
+  }
+  while (isdigit(LS->current)) {
+    checkbuffer(LS, l);
+    save_and_next(LS, l);
+  }
+  if (LS->current == 'e' || LS->current == 'E') {
+    save_and_next(LS, l);  /* read `E' */
+    if (hex || oct) {
+      save(LS, '\0', l);
+      luaX_lexerror(LS,
+	            "error in number, mixing exponential with octal or hexadecimal",
+	            TK_NUMBER);
+    }
+    if (LS->current == '+' || LS->current == '-')
+      save_and_next(LS, l);  /* optional exponent sign */
+    while (isdigit(LS->current)) {
+      checkbuffer(LS, l);
+      save_and_next(LS, l);
+    }
+  }
+  save(LS, '\0', l);
+  if (!luaO_str2d(luaZ_buffer(LS->buff), &seminfo->r))
+    luaX_lexerror(LS, "malformed number", TK_NUMBER);
+}
+
+
+static void read_long_string (LexState *LS, SemInfo *seminfo) {
+  int cont = 0;
+  size_t l = 0;
+  checkbuffer(LS, l);
+  save(LS, '[', l);  /* save first `[' */
+  save_and_next(LS, l);  /* pass the second `[' */
+  if (LS->current == '\n')  /* string starts with a newline? */
+    inclinenumber(LS);  /* skip it */
+  for (;;) {
+    checkbuffer(LS, l);
+    switch (LS->current) {
+      case EOZ:
+        save(LS, '\0', l);
+        luaX_lexerror(LS, (seminfo) ? "unfinished long string" :
+                                   "unfinished long comment", TK_EOS);
+        break;  /* to avoid warnings */
+      case '[':
+        save_and_next(LS, l);
+        if (LS->current == '[') {
+          cont++;
+          save_and_next(LS, l);
+        }
+        continue;
+      case ']':
+        save_and_next(LS, l);
+        if (LS->current == ']') {
+          if (cont == 0) goto endloop;
+          cont--;
+          save_and_next(LS, l);
+        }
+        continue;
+      case '\n':
+        save(LS, '\n', l);
+        inclinenumber(LS);
+        if (!seminfo) l = 0;  /* reset buffer to avoid wasting space */
+        continue;
+      default:
+        save_and_next(LS, l);
+    }
+  } endloop:
+  save_and_next(LS, l);  /* skip the second `]' */
+  save(LS, '\0', l);
+  if (seminfo)
+    seminfo->ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff) + 2, l - 5);
+}
+
+
+static void read_string (LexState *LS, int del, SemInfo *seminfo) {
+  size_t l = 0;
+  checkbuffer(LS, l);
+  save_and_next(LS, l);
+  while (LS->current != del) {
+    checkbuffer(LS, l);
+    switch (LS->current) {
+      case EOZ:
+        save(LS, '\0', l);
+        luaX_lexerror(LS, "unfinished string", TK_EOS);
+        break;  /* to avoid warnings */
+      case '\n':
+        save(LS, '\0', l);
+        luaX_lexerror(LS, "unfinished string", TK_STRING);
+        break;  /* to avoid warnings */
+      case '\\':
+        next(LS);  /* do not save the `\' */
+        switch (LS->current) {
+          case 'a': save(LS, '\a', l); next(LS); break;
+          case 'b': save(LS, '\b', l); next(LS); break;
+          case 'f': save(LS, '\f', l); next(LS); break;
+          case 'n': save(LS, '\n', l); next(LS); break;
+          case 'r': save(LS, '\r', l); next(LS); break;
+          case 't': save(LS, '\t', l); next(LS); break;
+          case 'v': save(LS, '\v', l); next(LS); break;
+          case '\n': save(LS, '\n', l); inclinenumber(LS); break;
+          case EOZ: break;  /* will raise an error next loop */
+          default: {
+            if (!isdigit(LS->current))
+              save_and_next(LS, l);  /* handles \\, \", \', and \? */
+            else {  /* \xxx */
+              int c = 0;
+              int i = 0;
+              do {
+                c = 10*c + (LS->current-'0');
+                next(LS);
+              } while (++i<3 && isdigit(LS->current));
+              if (c > UCHAR_MAX) {
+                save(LS, '\0', l);
+                luaX_lexerror(LS, "escape sequence too large", TK_STRING);
+              }
+              save(LS, c, l);
+            }
+          }
+        }
+        break;
+      default:
+        save_and_next(LS, l);
+    }
+  }
+  save_and_next(LS, l);  /* skip delimiter */
+  save(LS, '\0', l);
+  seminfo->ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff) + 1, l - 3);
+}
+
+
+int luaX_lex (LexState *LS, SemInfo *seminfo) {
+  for (;;) {
+    switch (LS->current) {
+
+      case '\n': {
+        inclinenumber(LS);
+        continue;
+      }
+      case '-': {
+        next(LS);
+        if (LS->current != '-') return '-';
+        /* else is a comment */
+        next(LS);
+        if (LS->current == '[' && (next(LS), LS->current == '['))
+          read_long_string(LS, NULL);  /* long comment */
+        else  /* short comment */
+          while (LS->current != '\n' && LS->current != EOZ)
+            next(LS);
+        continue;
+      }
+      case '[': {
+        next(LS);
+        if (LS->current != '[') return '[';
+        else {
+          read_long_string(LS, seminfo);
+          return TK_STRING;
+        }
+      }
+      case '=': {
+        next(LS);
+        if (LS->current != '=') return '=';
+        else { next(LS); return TK_EQ; }
+      }
+      case '<': {
+        next(LS);
+        if (LS->current != '=') return '<';
+        else { next(LS); return TK_LE; }
+      }
+      case '>': {
+        next(LS);
+        if (LS->current != '=') return '>';
+        else { next(LS); return TK_GE; }
+      }
+      case '~': {
+        next(LS);
+        if (LS->current != '=') return '~';
+        else { next(LS); return TK_NE; }
+      }
+      case '"':
+      case '\'': {
+        read_string(LS, LS->current, seminfo);
+        return TK_STRING;
+      }
+      case '.': {
+        next(LS);
+        if (LS->current == '.') {
+          next(LS);
+          if (LS->current == '.') {
+            next(LS);
+            return TK_DOTS;   /* ... */
+          }
+          else return TK_CONCAT;   /* .. */
+        }
+        else if (!isdigit(LS->current)) return '.';
+        else {
+          read_numeral(LS, 1, seminfo);
+          return TK_NUMBER;
+        }
+      }
+      case EOZ: {
+        return TK_EOS;
+      }
+      default: {
+        if (isspace(LS->current)) {
+          next(LS);
+          continue;
+        }
+        else if (isdigit(LS->current)) {
+          read_numeral(LS, 0, seminfo);
+          return TK_NUMBER;
+        }
+        else if (isalpha(LS->current) || LS->current == '_') {
+          /* identifier or reserved word */
+          size_t l = readname(LS);
+          TString *ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff), l);
+          if (ts->tsv.reserved > 0)  /* reserved word? */
+            return ts->tsv.reserved - 1 + FIRST_RESERVED;
+          seminfo->ts = ts;
+          return TK_NAME;
+        }
+        else {
+          int c = LS->current;
+          if (iscntrl(c))
+            luaX_error(LS, "invalid control char",
+                           luaO_pushfstring(LS->L, "char(%d)", c));
+          next(LS);
+          return c;  /* single-char tokens (+ - / ...) */
+        }
+      }
+    }
+  }
+}
+
+#undef next
diff --git a/lib/lua/src/lmem.c b/lib/lua/src/lmem.c
index e14f798..b10ec3f 100644
--- a/lib/lua/src/lmem.c
+++ b/lib/lua/src/lmem.c
@@ -1,91 +1,91 @@
-/*

-** $Id: lmem.c,v 1.3 2004-11-27 21:35:20 pixel Exp $

-** Interface to Memory Manager

-** See Copyright Notice in lua.h

-*/

-

-

-#include <stdlib.h>

-

-#define lmem_c

-

-#include "lua.h"

-

-#include "ldebug.h"

-#include "ldo.h"

-#include "lmem.h"

-#include "lobject.h"

-#include "lstate.h"

-

-

-

-/*

-** definition for realloc function. It must assure that l_realloc(NULL,

-** 0, x) allocates a new block (ANSI C assures that). (`os' is the old

-** block size; some allocators may use that.)

-*/

-#ifndef l_realloc

-#define l_realloc(b,os,s)	realloc(b,s)

-#endif

-

-/*

-** definition for free function. (`os' is the old block size; some

-** allocators may use that.)

-*/

-#ifndef l_free

-#define l_free(b,os)	free(b)

-#endif

-

-

-#define MINSIZEARRAY	4

-

-

-void *luaM_growaux (lua_State *L, void *block, int *size, int size_elems,

-                    int limit, const char *errormsg) {

-  void *newblock;

-  int newsize = (*size)*2;

-  if (newsize < MINSIZEARRAY)

-    newsize = MINSIZEARRAY;  /* minimum size */

-  else if (*size >= limit/2) {  /* cannot double it? */

-    if (*size < limit - MINSIZEARRAY)  /* try something smaller... */

-      newsize = limit;  /* still have at least MINSIZEARRAY free places */

-    else luaG_runerror(L, errormsg);

-  }

-  newblock = luaM_realloc(L, block,

-                          cast(lu_mem, *size)*cast(lu_mem, size_elems),

-                          cast(lu_mem, newsize)*cast(lu_mem, size_elems));

-  *size = newsize;  /* update only when everything else is OK */

-  return newblock;

-}

-

-

-/*

-** generic allocation routine.

-*/

-void *luaM_realloc (lua_State *L, void *block, lu_mem oldsize, lu_mem size) {

-  lua_assert((oldsize == 0) == (block == NULL));

-  if (size == 0) {

-    if (block != NULL) {

-      l_free(block, oldsize);

-      block = NULL;

-    }

-    else return NULL;  /* avoid `nblocks' computations when oldsize==size==0 */

-  }

-  else if (size >= MAX_SIZET)

-    luaG_runerror(L, "memory allocation error: block too big");

-  else {

-    block = l_realloc(block, oldsize, size);

-    if (block == NULL) {

-      if (L)

-        luaD_throw(L, LUA_ERRMEM);

-      else return NULL;  /* error before creating state! */

-    }

-  }

-  if (L) {

-    lua_assert(G(L) != NULL && G(L)->nblocks > 0);

-    G(L)->nblocks -= oldsize;

-    G(L)->nblocks += size;

-  }

-  return block;

-}

-

+/*
+** $Id: lmem.c,v 1.4 2004-11-27 21:46:07 pixel Exp $
+** Interface to Memory Manager
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdlib.h>
+
+#define lmem_c
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+
+
+
+/*
+** definition for realloc function. It must assure that l_realloc(NULL,
+** 0, x) allocates a new block (ANSI C assures that). (`os' is the old
+** block size; some allocators may use that.)
+*/
+#ifndef l_realloc
+#define l_realloc(b,os,s)	realloc(b,s)
+#endif
+
+/*
+** definition for free function. (`os' is the old block size; some
+** allocators may use that.)
+*/
+#ifndef l_free
+#define l_free(b,os)	free(b)
+#endif
+
+
+#define MINSIZEARRAY	4
+
+
+void *luaM_growaux (lua_State *L, void *block, int *size, int size_elems,
+                    int limit, const char *errormsg) {
+  void *newblock;
+  int newsize = (*size)*2;
+  if (newsize < MINSIZEARRAY)
+    newsize = MINSIZEARRAY;  /* minimum size */
+  else if (*size >= limit/2) {  /* cannot double it? */
+    if (*size < limit - MINSIZEARRAY)  /* try something smaller... */
+      newsize = limit;  /* still have at least MINSIZEARRAY free places */
+    else luaG_runerror(L, errormsg);
+  }
+  newblock = luaM_realloc(L, block,
+                          cast(lu_mem, *size)*cast(lu_mem, size_elems),
+                          cast(lu_mem, newsize)*cast(lu_mem, size_elems));
+  *size = newsize;  /* update only when everything else is OK */
+  return newblock;
+}
+
+
+/*
+** generic allocation routine.
+*/
+void *luaM_realloc (lua_State *L, void *block, lu_mem oldsize, lu_mem size) {
+  lua_assert((oldsize == 0) == (block == NULL));
+  if (size == 0) {
+    if (block != NULL) {
+      l_free(block, oldsize);
+      block = NULL;
+    }
+    else return NULL;  /* avoid `nblocks' computations when oldsize==size==0 */
+  }
+  else if (size >= MAX_SIZET)
+    luaG_runerror(L, "memory allocation error: block too big");
+  else {
+    block = l_realloc(block, oldsize, size);
+    if (block == NULL) {
+      if (L)
+        luaD_throw(L, LUA_ERRMEM);
+      else return NULL;  /* error before creating state! */
+    }
+  }
+  if (L) {
+    lua_assert(G(L) != NULL && G(L)->nblocks > 0);
+    G(L)->nblocks -= oldsize;
+    G(L)->nblocks += size;
+  }
+  return block;
+}
+
diff --git a/lib/lua/src/lobject.c b/lib/lua/src/lobject.c
index 7153a1c..bdc83b3 100644
--- a/lib/lua/src/lobject.c
+++ b/lib/lua/src/lobject.c
@@ -1,198 +1,198 @@
-/*

-** $Id: lobject.c,v 1.4 2004-11-27 21:35:20 pixel Exp $

-** Some generic functions over Lua objects

-** See Copyright Notice in lua.h

-*/

-

-#include <ctype.h>

-#include <stdarg.h>

-#include <stdlib.h>

-#include <string.h>

-

-#define lobject_c

-

-#include "lua.h"

-

-#include "ldo.h"

-#include "lmem.h"

-#include "lobject.h"

-#include "lstate.h"

-#include "lstring.h"

-#include "lvm.h"

-

-const TObject luaO_nilobject = {LUA_TNIL, {NULL}};

-

-

-/*

-** converts an integer to a "floating point byte", represented as

-** (mmmmmxxx), where the real value is (xxx) * 2^(mmmmm)

-*/

-int luaO_int2fb (unsigned int x) {

-  int m = 0;  /* mantissa */

-  while (x >= (1<<3)) {

-    x = (x+1) >> 1;

-    m++;

-  }

-  return (m << 3) | cast(int, x);

-}

-

-

-int luaO_log2 (unsigned int x) {

-  static const lu_byte log_8[255] = {

-    0,

-    1,1,

-    2,2,2,2,

-    3,3,3,3,3,3,3,3,

-    4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,

-    5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,

-    6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,

-    6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,

-    7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,

-    7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,

-    7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,

-    7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7

-  };

-  if (x >= 0x00010000) {

-    if (x >= 0x01000000) return log_8[((x>>24) & 0xff) - 1]+24;

-    else return log_8[((x>>16) & 0xff) - 1]+16;

-  }

-  else {

-    if (x >= 0x00000100) return log_8[((x>>8) & 0xff) - 1]+8;

-    else if (x) return log_8[(x & 0xff) - 1];

-    return -1;  /* special `log' for 0 */

-  }

-}

-

-

-int luaO_rawequalObj (const TObject *t1, const TObject *t2) {

-  if (ttype(t1) != ttype(t2)) return 0;

-  else switch (ttype(t1)) {

-    case LUA_TNIL:

-      return 1;

-    case LUA_TNUMBER:

-      return nvalue(t1) == nvalue(t2);

-    case LUA_TBOOLEAN:

-      return bvalue(t1) == bvalue(t2);  /* boolean true must be 1 !! */

-    case LUA_TLIGHTUSERDATA:

-      return pvalue(t1) == pvalue(t2);

-    default:

-      lua_assert(iscollectable(t1));

-      return gcvalue(t1) == gcvalue(t2);

-  }

-}

-

-

-int luaO_str2d (const char *s, lua_Number *result) {

-  char *endptr;

-  size_t l = strlen(s);

-  lua_Number res;

-  if ((l > 0) && (s[0] == '0')) {

-    if ((l > 2) && (s[1] == 'x')) {

-      res = strtol(s + 2, &endptr, 16);

-    } else {

-      res = strtol(s + 1, &endptr, 8);

-    }

-  } else {

-    res = strtod(s, &endptr);

-  }

-  if (endptr == s) return 0;  /* no conversion */

-  while (isspace((unsigned char)(*endptr))) endptr++;

-  if (*endptr != '\0') return 0;  /* invalid trailing characters? */

-  *result = res;

-  return 1;

-}

-

-

-

-static void pushstr (lua_State *L, const char *str) {

-  setsvalue2s(L->top, luaS_new(L, str));

-  incr_top(L);

-}

-

-

-/* this function handles only `%d', `%c', %f, and `%s' formats */

-const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {

-  int n = 1;

-  pushstr(L, "");

-  for (;;) {

-    const char *e = strchr(fmt, '%');

-    if (e == NULL) break;

-    setsvalue2s(L->top, luaS_newlstr(L, fmt, e-fmt));

-    incr_top(L);

-    switch (*(e+1)) {

-      case 's':

-        pushstr(L, va_arg(argp, char *));

-        break;

-      case 'c': {

-        char buff[2];

-        buff[0] = cast(char, va_arg(argp, int));

-        buff[1] = '\0';

-        pushstr(L, buff);

-        break;

-      }

-      case 'd':

-        setnvalue(L->top, cast(lua_Number, va_arg(argp, int)));

-        incr_top(L);

-        break;

-      case 'f':

-        setnvalue(L->top, cast(lua_Number, va_arg(argp, l_uacNumber)));

-        incr_top(L);

-        break;

-      case '%':

-        pushstr(L, "%");

-        break;

-      default: lua_assert(0);

-    }

-    n += 2;

-    fmt = e+2;

-  }

-  pushstr(L, fmt);

-  luaV_concat(L, n+1, L->top - L->base - 1);

-  L->top -= n;

-  return svalue(L->top - 1);

-}

-

-

-const char *luaO_pushfstring (lua_State *L, const char *fmt, ...) {

-  const char *msg;

-  va_list argp;

-  va_start(argp, fmt);

-  msg = luaO_pushvfstring(L, fmt, argp);

-  va_end(argp);

-  return msg;

-}

-

-

-void luaO_chunkid (char *out, const char *source, int bufflen) {

-  if (*source == '=') {

-    strncpy(out, source+1, bufflen);  /* remove first char */

-    out[bufflen-1] = '\0';  /* ensures null termination */

-  }

-  else {  /* out = "source", or "...source" */

-    if (*source == '@') {

-      int l;

-      source++;  /* skip the `@' */

-      bufflen -= sizeof(" `...' ");

-      l = strlen(source);

-      strcpy(out, "");

-      if (l>bufflen) {

-        source += (l-bufflen);  /* get last part of file name */

-        strcat(out, "...");

-      }

-      strcat(out, source);

-    }

-    else {  /* out = [string "string"] */

-      int len = strcspn(source, "\n");  /* stop at first newline */

-      bufflen -= sizeof(" [string \"...\"] ");

-      if (len > bufflen) len = bufflen;

-      strcpy(out, "[string \"");

-      if (source[len] != '\0') {  /* must truncate? */

-        strncat(out, source, len);

-        strcat(out, "...");

-      }

-      else

-        strcat(out, source);

-      strcat(out, "\"]");

-    }

-  }

-}

+/*
+** $Id: lobject.c,v 1.5 2004-11-27 21:46:07 pixel Exp $
+** Some generic functions over Lua objects
+** See Copyright Notice in lua.h
+*/
+
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define lobject_c
+
+#include "lua.h"
+
+#include "ldo.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "lvm.h"
+
+const TObject luaO_nilobject = {LUA_TNIL, {NULL}};
+
+
+/*
+** converts an integer to a "floating point byte", represented as
+** (mmmmmxxx), where the real value is (xxx) * 2^(mmmmm)
+*/
+int luaO_int2fb (unsigned int x) {
+  int m = 0;  /* mantissa */
+  while (x >= (1<<3)) {
+    x = (x+1) >> 1;
+    m++;
+  }
+  return (m << 3) | cast(int, x);
+}
+
+
+int luaO_log2 (unsigned int x) {
+  static const lu_byte log_8[255] = {
+    0,
+    1,1,
+    2,2,2,2,
+    3,3,3,3,3,3,3,3,
+    4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
+    5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
+    6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
+    6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
+    7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+    7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+    7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+    7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
+  };
+  if (x >= 0x00010000) {
+    if (x >= 0x01000000) return log_8[((x>>24) & 0xff) - 1]+24;
+    else return log_8[((x>>16) & 0xff) - 1]+16;
+  }
+  else {
+    if (x >= 0x00000100) return log_8[((x>>8) & 0xff) - 1]+8;
+    else if (x) return log_8[(x & 0xff) - 1];
+    return -1;  /* special `log' for 0 */
+  }
+}
+
+
+int luaO_rawequalObj (const TObject *t1, const TObject *t2) {
+  if (ttype(t1) != ttype(t2)) return 0;
+  else switch (ttype(t1)) {
+    case LUA_TNIL:
+      return 1;
+    case LUA_TNUMBER:
+      return nvalue(t1) == nvalue(t2);
+    case LUA_TBOOLEAN:
+      return bvalue(t1) == bvalue(t2);  /* boolean true must be 1 !! */
+    case LUA_TLIGHTUSERDATA:
+      return pvalue(t1) == pvalue(t2);
+    default:
+      lua_assert(iscollectable(t1));
+      return gcvalue(t1) == gcvalue(t2);
+  }
+}
+
+
+int luaO_str2d (const char *s, lua_Number *result) {
+  char *endptr;
+  size_t l = strlen(s);
+  lua_Number res;
+  if ((l > 0) && (s[0] == '0')) {
+    if ((l > 2) && (s[1] == 'x')) {
+      res = strtol(s + 2, &endptr, 16);
+    } else {
+      res = strtol(s + 1, &endptr, 8);
+    }
+  } else {
+    res = strtod(s, &endptr);
+  }
+  if (endptr == s) return 0;  /* no conversion */
+  while (isspace((unsigned char)(*endptr))) endptr++;
+  if (*endptr != '\0') return 0;  /* invalid trailing characters? */
+  *result = res;
+  return 1;
+}
+
+
+
+static void pushstr (lua_State *L, const char *str) {
+  setsvalue2s(L->top, luaS_new(L, str));
+  incr_top(L);
+}
+
+
+/* this function handles only `%d', `%c', %f, and `%s' formats */
+const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
+  int n = 1;
+  pushstr(L, "");
+  for (;;) {
+    const char *e = strchr(fmt, '%');
+    if (e == NULL) break;
+    setsvalue2s(L->top, luaS_newlstr(L, fmt, e-fmt));
+    incr_top(L);
+    switch (*(e+1)) {
+      case 's':
+        pushstr(L, va_arg(argp, char *));
+        break;
+      case 'c': {
+        char buff[2];
+        buff[0] = cast(char, va_arg(argp, int));
+        buff[1] = '\0';
+        pushstr(L, buff);
+        break;
+      }
+      case 'd':
+        setnvalue(L->top, cast(lua_Number, va_arg(argp, int)));
+        incr_top(L);
+        break;
+      case 'f':
+        setnvalue(L->top, cast(lua_Number, va_arg(argp, l_uacNumber)));
+        incr_top(L);
+        break;
+      case '%':
+        pushstr(L, "%");
+        break;
+      default: lua_assert(0);
+    }
+    n += 2;
+    fmt = e+2;
+  }
+  pushstr(L, fmt);
+  luaV_concat(L, n+1, L->top - L->base - 1);
+  L->top -= n;
+  return svalue(L->top - 1);
+}
+
+
+const char *luaO_pushfstring (lua_State *L, const char *fmt, ...) {
+  const char *msg;
+  va_list argp;
+  va_start(argp, fmt);
+  msg = luaO_pushvfstring(L, fmt, argp);
+  va_end(argp);
+  return msg;
+}
+
+
+void luaO_chunkid (char *out, const char *source, int bufflen) {
+  if (*source == '=') {
+    strncpy(out, source+1, bufflen);  /* remove first char */
+    out[bufflen-1] = '\0';  /* ensures null termination */
+  }
+  else {  /* out = "source", or "...source" */
+    if (*source == '@') {
+      int l;
+      source++;  /* skip the `@' */
+      bufflen -= sizeof(" `...' ");
+      l = strlen(source);
+      strcpy(out, "");
+      if (l>bufflen) {
+        source += (l-bufflen);  /* get last part of file name */
+        strcat(out, "...");
+      }
+      strcat(out, source);
+    }
+    else {  /* out = [string "string"] */
+      int len = strcspn(source, "\n");  /* stop at first newline */
+      bufflen -= sizeof(" [string \"...\"] ");
+      if (len > bufflen) len = bufflen;
+      strcpy(out, "[string \"");
+      if (source[len] != '\0') {  /* must truncate? */
+        strncat(out, source, len);
+        strcat(out, "...");
+      }
+      else
+        strcat(out, source);
+      strcat(out, "\"]");
+    }
+  }
+}
diff --git a/lib/lua/src/lopcodes.c b/lib/lua/src/lopcodes.c
index 6d405d4..c018ea8 100644
--- a/lib/lua/src/lopcodes.c
+++ b/lib/lua/src/lopcodes.c
@@ -1,102 +1,102 @@
-/*

-** $Id: lopcodes.c,v 1.3 2004-11-27 21:35:20 pixel Exp $

-** extracted automatically from lopcodes.h by mkprint.lua

-** DO NOT EDIT

-** See Copyright Notice in lua.h

-*/

-

-

-#define lopcodes_c

-

-#include "lua.h"

-

-#include "lobject.h"

-#include "lopcodes.h"

-

-

-#ifdef LUA_OPNAMES

-

-const char *const luaP_opnames[] = {

-  "MOVE",

-  "LOADK",

-  "LOADBOOL",

-  "LOADNIL",

-  "GETUPVAL",

-  "GETGLOBAL",

-  "GETTABLE",

-  "SETGLOBAL",

-  "SETUPVAL",

-  "SETTABLE",

-  "NEWTABLE",

-  "SELF",

-  "ADD",

-  "SUB",

-  "MUL",

-  "DIV",

-  "POW",

-  "UNM",

-  "NOT",

-  "CONCAT",

-  "JMP",

-  "EQ",

-  "LT",

-  "LE",

-  "TEST",

-  "CALL",

-  "TAILCALL",

-  "RETURN",

-  "FORLOOP",

-  "TFORLOOP",

-  "TFORPREP",

-  "SETLIST",

-  "SETLISTO",

-  "CLOSE",

-  "CLOSURE"

-};

-

-#endif

-

-#define opmode(t,b,bk,ck,sa,k,m) (((t)<<OpModeT) | \

-   ((b)<<OpModeBreg) | ((bk)<<OpModeBrk) | ((ck)<<OpModeCrk) | \

-   ((sa)<<OpModesetA) | ((k)<<OpModeK) | (m))

-

-

-const lu_byte luaP_opmodes[NUM_OPCODES] = {

-/*       T  B Bk Ck sA  K  mode			   opcode    */

-  opmode(0, 1, 0, 0, 1, 0, iABC)		/* OP_MOVE */

- ,opmode(0, 0, 0, 0, 1, 1, iABx)		/* OP_LOADK */

- ,opmode(0, 0, 0, 0, 1, 0, iABC)		/* OP_LOADBOOL */

- ,opmode(0, 1, 0, 0, 1, 0, iABC)		/* OP_LOADNIL */

- ,opmode(0, 0, 0, 0, 1, 0, iABC)		/* OP_GETUPVAL */

- ,opmode(0, 0, 0, 0, 1, 1, iABx)		/* OP_GETGLOBAL */

- ,opmode(0, 1, 0, 1, 1, 0, iABC)		/* OP_GETTABLE */

- ,opmode(0, 0, 0, 0, 0, 1, iABx)		/* OP_SETGLOBAL */

- ,opmode(0, 0, 0, 0, 0, 0, iABC)		/* OP_SETUPVAL */

- ,opmode(0, 0, 1, 1, 0, 0, iABC)		/* OP_SETTABLE */

- ,opmode(0, 0, 0, 0, 1, 0, iABC)		/* OP_NEWTABLE */

- ,opmode(0, 1, 0, 1, 1, 0, iABC)		/* OP_SELF */

- ,opmode(0, 0, 1, 1, 1, 0, iABC)		/* OP_ADD */

- ,opmode(0, 0, 1, 1, 1, 0, iABC)		/* OP_SUB */

- ,opmode(0, 0, 1, 1, 1, 0, iABC)		/* OP_MUL */

- ,opmode(0, 0, 1, 1, 1, 0, iABC)		/* OP_DIV */

- ,opmode(0, 0, 1, 1, 1, 0, iABC)		/* OP_POW */

- ,opmode(0, 1, 0, 0, 1, 0, iABC)		/* OP_UNM */

- ,opmode(0, 1, 0, 0, 1, 0, iABC)		/* OP_NOT */

- ,opmode(0, 1, 0, 1, 1, 0, iABC)		/* OP_CONCAT */

- ,opmode(0, 0, 0, 0, 0, 0, iAsBx)		/* OP_JMP */

- ,opmode(1, 0, 1, 1, 0, 0, iABC)		/* OP_EQ */

- ,opmode(1, 0, 1, 1, 0, 0, iABC)		/* OP_LT */

- ,opmode(1, 0, 1, 1, 0, 0, iABC)		/* OP_LE */

- ,opmode(1, 1, 0, 0, 1, 0, iABC)		/* OP_TEST */

- ,opmode(0, 0, 0, 0, 0, 0, iABC)		/* OP_CALL */

- ,opmode(0, 0, 0, 0, 0, 0, iABC)		/* OP_TAILCALL */

- ,opmode(0, 0, 0, 0, 0, 0, iABC)		/* OP_RETURN */

- ,opmode(0, 0, 0, 0, 0, 0, iAsBx)		/* OP_FORLOOP */

- ,opmode(1, 0, 0, 0, 0, 0, iABC)		/* OP_TFORLOOP */

- ,opmode(0, 0, 0, 0, 0, 0, iAsBx)		/* OP_TFORPREP */

- ,opmode(0, 0, 0, 0, 0, 0, iABx)		/* OP_SETLIST */

- ,opmode(0, 0, 0, 0, 0, 0, iABx)		/* OP_SETLISTO */

- ,opmode(0, 0, 0, 0, 0, 0, iABC)		/* OP_CLOSE */

- ,opmode(0, 0, 0, 0, 1, 0, iABx)		/* OP_CLOSURE */

-};

-

+/*
+** $Id: lopcodes.c,v 1.4 2004-11-27 21:46:07 pixel Exp $
+** extracted automatically from lopcodes.h by mkprint.lua
+** DO NOT EDIT
+** See Copyright Notice in lua.h
+*/
+
+
+#define lopcodes_c
+
+#include "lua.h"
+
+#include "lobject.h"
+#include "lopcodes.h"
+
+
+#ifdef LUA_OPNAMES
+
+const char *const luaP_opnames[] = {
+  "MOVE",
+  "LOADK",
+  "LOADBOOL",
+  "LOADNIL",
+  "GETUPVAL",
+  "GETGLOBAL",
+  "GETTABLE",
+  "SETGLOBAL",
+  "SETUPVAL",
+  "SETTABLE",
+  "NEWTABLE",
+  "SELF",
+  "ADD",
+  "SUB",
+  "MUL",
+  "DIV",
+  "POW",
+  "UNM",
+  "NOT",
+  "CONCAT",
+  "JMP",
+  "EQ",
+  "LT",
+  "LE",
+  "TEST",
+  "CALL",
+  "TAILCALL",
+  "RETURN",
+  "FORLOOP",
+  "TFORLOOP",
+  "TFORPREP",
+  "SETLIST",
+  "SETLISTO",
+  "CLOSE",
+  "CLOSURE"
+};
+
+#endif
+
+#define opmode(t,b,bk,ck,sa,k,m) (((t)<<OpModeT) | \
+   ((b)<<OpModeBreg) | ((bk)<<OpModeBrk) | ((ck)<<OpModeCrk) | \
+   ((sa)<<OpModesetA) | ((k)<<OpModeK) | (m))
+
+
+const lu_byte luaP_opmodes[NUM_OPCODES] = {
+/*       T  B Bk Ck sA  K  mode			   opcode    */
+  opmode(0, 1, 0, 0, 1, 0, iABC)		/* OP_MOVE */
+ ,opmode(0, 0, 0, 0, 1, 1, iABx)		/* OP_LOADK */
+ ,opmode(0, 0, 0, 0, 1, 0, iABC)		/* OP_LOADBOOL */
+ ,opmode(0, 1, 0, 0, 1, 0, iABC)		/* OP_LOADNIL */
+ ,opmode(0, 0, 0, 0, 1, 0, iABC)		/* OP_GETUPVAL */
+ ,opmode(0, 0, 0, 0, 1, 1, iABx)		/* OP_GETGLOBAL */
+ ,opmode(0, 1, 0, 1, 1, 0, iABC)		/* OP_GETTABLE */
+ ,opmode(0, 0, 0, 0, 0, 1, iABx)		/* OP_SETGLOBAL */
+ ,opmode(0, 0, 0, 0, 0, 0, iABC)		/* OP_SETUPVAL */
+ ,opmode(0, 0, 1, 1, 0, 0, iABC)		/* OP_SETTABLE */
+ ,opmode(0, 0, 0, 0, 1, 0, iABC)		/* OP_NEWTABLE */
+ ,opmode(0, 1, 0, 1, 1, 0, iABC)		/* OP_SELF */
+ ,opmode(0, 0, 1, 1, 1, 0, iABC)		/* OP_ADD */
+ ,opmode(0, 0, 1, 1, 1, 0, iABC)		/* OP_SUB */
+ ,opmode(0, 0, 1, 1, 1, 0, iABC)		/* OP_MUL */
+ ,opmode(0, 0, 1, 1, 1, 0, iABC)		/* OP_DIV */
+ ,opmode(0, 0, 1, 1, 1, 0, iABC)		/* OP_POW */
+ ,opmode(0, 1, 0, 0, 1, 0, iABC)		/* OP_UNM */
+ ,opmode(0, 1, 0, 0, 1, 0, iABC)		/* OP_NOT */
+ ,opmode(0, 1, 0, 1, 1, 0, iABC)		/* OP_CONCAT */
+ ,opmode(0, 0, 0, 0, 0, 0, iAsBx)		/* OP_JMP */
+ ,opmode(1, 0, 1, 1, 0, 0, iABC)		/* OP_EQ */
+ ,opmode(1, 0, 1, 1, 0, 0, iABC)		/* OP_LT */
+ ,opmode(1, 0, 1, 1, 0, 0, iABC)		/* OP_LE */
+ ,opmode(1, 1, 0, 0, 1, 0, iABC)		/* OP_TEST */
+ ,opmode(0, 0, 0, 0, 0, 0, iABC)		/* OP_CALL */
+ ,opmode(0, 0, 0, 0, 0, 0, iABC)		/* OP_TAILCALL */
+ ,opmode(0, 0, 0, 0, 0, 0, iABC)		/* OP_RETURN */
+ ,opmode(0, 0, 0, 0, 0, 0, iAsBx)		/* OP_FORLOOP */
+ ,opmode(1, 0, 0, 0, 0, 0, iABC)		/* OP_TFORLOOP */
+ ,opmode(0, 0, 0, 0, 0, 0, iAsBx)		/* OP_TFORPREP */
+ ,opmode(0, 0, 0, 0, 0, 0, iABx)		/* OP_SETLIST */
+ ,opmode(0, 0, 0, 0, 0, 0, iABx)		/* OP_SETLISTO */
+ ,opmode(0, 0, 0, 0, 0, 0, iABC)		/* OP_CLOSE */
+ ,opmode(0, 0, 0, 0, 1, 0, iABx)		/* OP_CLOSURE */
+};
+
diff --git a/lib/lua/src/lparser.c b/lib/lua/src/lparser.c
index 2b557d4..a242338 100644
--- a/lib/lua/src/lparser.c
+++ b/lib/lua/src/lparser.c
@@ -1,1329 +1,1329 @@
-/*

-** $Id: lparser.c,v 1.3 2004-11-27 21:35:20 pixel Exp $

-** Lua Parser

-** See Copyright Notice in lua.h

-*/

-

-

-#include <string.h>

-

-#define lparser_c

-

-#include "lua.h"

-

-#include "lcode.h"

-#include "ldebug.h"

-#include "lfunc.h"

-#include "llex.h"

-#include "lmem.h"

-#include "lobject.h"

-#include "lopcodes.h"

-#include "lparser.h"

-#include "lstate.h"

-#include "lstring.h"

-

-

-

-

-#define getlocvar(fs, i)	((fs)->f->locvars[(fs)->actvar[i]])

-

-

-#define enterlevel(ls)	if (++(ls)->nestlevel > LUA_MAXPARSERLEVEL) \

-		luaX_syntaxerror(ls, "too many syntax levels");

-#define leavelevel(ls)	((ls)->nestlevel--)

-

-

-/*

-** nodes for block list (list of active blocks)

-*/

-typedef struct BlockCnt {

-  struct BlockCnt *previous;  /* chain */

-  int breaklist;  /* list of jumps out of this loop */

-  int nactvar;  /* # active local variables outside the breakable structure */

-  int upval;  /* true if some variable in the block is an upvalue */

-  int isbreakable;  /* true if `block' is a loop */

-} BlockCnt;

-

-

-

-/*

-** prototypes for recursive non-terminal functions

-*/

-static void chunk (LexState *ls);

-static void expr (LexState *ls, expdesc *v);

-

-

-

-static void next (LexState *ls) {

-  ls->lastline = ls->linenumber;

-  if (ls->lookahead.token != TK_EOS) {  /* is there a look-ahead token? */

-    ls->t = ls->lookahead;  /* use this one */

-    ls->lookahead.token = TK_EOS;  /* and discharge it */

-  }

-  else

-    ls->t.token = luaX_lex(ls, &ls->t.seminfo);  /* read next token */

-}

-

-

-static void lookahead (LexState *ls) {

-  lua_assert(ls->lookahead.token == TK_EOS);

-  ls->lookahead.token = luaX_lex(ls, &ls->lookahead.seminfo);

-}

-

-

-static void error_expected (LexState *ls, int token) {

-  luaX_syntaxerror(ls,

-         luaO_pushfstring(ls->L, "`%s' expected", luaX_token2str(ls, token)));

-}

-

-

-static int testnext (LexState *ls, int c) {

-  if (ls->t.token == c) {

-    next(ls);

-    return 1;

-  }

-  else return 0;

-}

-

-

-static void check (LexState *ls, int c) {

-  if (!testnext(ls, c))

-    error_expected(ls, c);

-}

-

-

-#define check_condition(ls,c,msg)	{ if (!(c)) luaX_syntaxerror(ls, msg); }

-

-

-

-static void check_match (LexState *ls, int what, int who, int where) {

-  if (!testnext(ls, what)) {

-    if (where == ls->linenumber)

-      error_expected(ls, what);

-    else {

-      luaX_syntaxerror(ls, luaO_pushfstring(ls->L,

-             "`%s' expected (to close `%s' at line %d)",

-              luaX_token2str(ls, what), luaX_token2str(ls, who), where));

-    }

-  }

-}

-

-

-static TString *str_checkname (LexState *ls) {

-  TString *ts;

-  check_condition(ls, (ls->t.token == TK_NAME), "<name> expected");

-  ts = ls->t.seminfo.ts;

-  next(ls);

-  return ts;

-}

-

-

-static void init_exp (expdesc *e, expkind k, int i) {

-  e->f = e->t = NO_JUMP;

-  e->k = k;

-  e->info = i;

-}

-

-

-static void codestring (LexState *ls, expdesc *e, TString *s) {

-  init_exp(e, VK, luaK_stringK(ls->fs, s));

-}

-

-

-static void checkname(LexState *ls, expdesc *e) {

-  codestring(ls, e, str_checkname(ls));

-}

-

-

-static int luaI_registerlocalvar (LexState *ls, TString *varname) {

-  FuncState *fs = ls->fs;

-  Proto *f = fs->f;

-  luaM_growvector(ls->L, f->locvars, fs->nlocvars, f->sizelocvars,

-                  LocVar, MAX_INT, "");

-  f->locvars[fs->nlocvars].varname = varname;

-  return fs->nlocvars++;

-}

-

-

-static void new_localvar (LexState *ls, TString *name, int n) {

-  FuncState *fs = ls->fs;

-  luaX_checklimit(ls, fs->nactvar+n+1, MAXVARS, "local variables");

-  fs->actvar[fs->nactvar+n] = luaI_registerlocalvar(ls, name);

-}

-

-

-static void adjustlocalvars (LexState *ls, int nvars) {

-  FuncState *fs = ls->fs;

-  fs->nactvar += nvars;

-  for (; nvars; nvars--) {

-    getlocvar(fs, fs->nactvar - nvars).startpc = fs->pc;

-  }

-}

-

-

-static void removevars (LexState *ls, int tolevel) {

-  FuncState *fs = ls->fs;

-  while (fs->nactvar > tolevel)

-    getlocvar(fs, --fs->nactvar).endpc = fs->pc;

-}

-

-

-static void new_localvarstr (LexState *ls, const char *name, int n) {

-  new_localvar(ls, luaS_new(ls->L, name), n);

-}

-

-

-static void create_local (LexState *ls, const char *name) {

-  new_localvarstr(ls, name, 0);

-  adjustlocalvars(ls, 1);

-}

-

-

-static int indexupvalue (FuncState *fs, TString *name, expdesc *v) {

-  int i;

-  Proto *f = fs->f;

-  for (i=0; i<f->nups; i++) {

-    if (fs->upvalues[i].k == v->k && fs->upvalues[i].info == v->info) {

-      lua_assert(fs->f->upvalues[i] == name);

-      return i;

-    }

-  }

-  /* new one */

-  luaX_checklimit(fs->ls, f->nups + 1, MAXUPVALUES, "upvalues");

-  luaM_growvector(fs->L, fs->f->upvalues, f->nups, fs->f->sizeupvalues,

-                  TString *, MAX_INT, "");

-  fs->f->upvalues[f->nups] = name;

-  fs->upvalues[f->nups] = *v;

-  return f->nups++;

-}

-

-

-static int searchvar (FuncState *fs, TString *n) {

-  int i;

-  for (i=fs->nactvar-1; i >= 0; i--) {

-    if (n == getlocvar(fs, i).varname)

-      return i;

-  }

-  return -1;  /* not found */

-}

-

-

-static void markupval (FuncState *fs, int level) {

-  BlockCnt *bl = fs->bl;

-  while (bl && bl->nactvar > level) bl = bl->previous;

-  if (bl) bl->upval = 1;

-}

-

-

-static void singlevaraux (FuncState *fs, TString *n, expdesc *var, int base) {

-  if (fs == NULL)  /* no more levels? */

-    init_exp(var, VGLOBAL, NO_REG);  /* default is global variable */

-  else {

-    int v = searchvar(fs, n);  /* look up at current level */

-    if (v >= 0) {

-      init_exp(var, VLOCAL, v);

-      if (!base)

-        markupval(fs, v);  /* local will be used as an upval */

-    }

-    else {  /* not found at current level; try upper one */

-      singlevaraux(fs->prev, n, var, 0);

-      if (var->k == VGLOBAL) {

-        if (base)

-          var->info = luaK_stringK(fs, n);  /* info points to global name */

-      }

-      else {  /* LOCAL or UPVAL */

-        var->info = indexupvalue(fs, n, var);

-        var->k = VUPVAL;  /* upvalue in this level */

-      }

-    }

-  }

-}

-

-

-static TString *singlevar (LexState *ls, expdesc *var, int base) {

-  TString *varname = str_checkname(ls);

-  singlevaraux(ls->fs, varname, var, base);

-  return varname;

-}

-

-

-static void adjust_assign (LexState *ls, int nvars, int nexps, expdesc *e) {

-  FuncState *fs = ls->fs;

-  int extra = nvars - nexps;

-  if (e->k == VCALL) {

-    extra++;  /* includes call itself */

-    if (extra <= 0) extra = 0;

-    else luaK_reserveregs(fs, extra-1);

-    luaK_setcallreturns(fs, e, extra);  /* call provides the difference */

-  }

-  else {

-    if (e->k != VVOID) luaK_exp2nextreg(fs, e);  /* close last expression */

-    if (extra > 0) {

-      int reg = fs->freereg;

-      luaK_reserveregs(fs, extra);

-      luaK_nil(fs, reg, extra);

-    }

-  }

-}

-

-

-static void code_params (LexState *ls, int nparams, int dots) {

-  FuncState *fs = ls->fs;

-  adjustlocalvars(ls, nparams);

-  luaX_checklimit(ls, fs->nactvar, MAXPARAMS, "parameters");

-  fs->f->numparams = cast(lu_byte, fs->nactvar);

-  fs->f->is_vararg = cast(lu_byte, dots);

-  if (dots)

-    create_local(ls, "arg");

-  luaK_reserveregs(fs, fs->nactvar);  /* reserve register for parameters */

-}

-

-

-static void enterblock (FuncState *fs, BlockCnt *bl, int isbreakable) {

-  bl->breaklist = NO_JUMP;

-  bl->isbreakable = isbreakable;

-  bl->nactvar = fs->nactvar;

-  bl->upval = 0;

-  bl->previous = fs->bl;

-  fs->bl = bl;

-  lua_assert(fs->freereg == fs->nactvar);

-}

-

-

-static void leaveblock (FuncState *fs) {

-  BlockCnt *bl = fs->bl;

-  fs->bl = bl->previous;

-  removevars(fs->ls, bl->nactvar);

-  if (bl->upval)

-    luaK_codeABC(fs, OP_CLOSE, bl->nactvar, 0, 0);

-  lua_assert(bl->nactvar == fs->nactvar);

-  fs->freereg = fs->nactvar;  /* free registers */

-  luaK_patchtohere(fs, bl->breaklist);

-}

-

-

-static void pushclosure (LexState *ls, FuncState *func, expdesc *v) {

-  FuncState *fs = ls->fs;

-  Proto *f = fs->f;

-  int i;

-  luaM_growvector(ls->L, f->p, fs->np, f->sizep, Proto *,

-                  MAXARG_Bx, "constant table overflow");

-  f->p[fs->np++] = func->f;

-  init_exp(v, VRELOCABLE, luaK_codeABx(fs, OP_CLOSURE, 0, fs->np-1));

-  for (i=0; i<func->f->nups; i++) {

-    OpCode o = (func->upvalues[i].k == VLOCAL) ? OP_MOVE : OP_GETUPVAL;

-    luaK_codeABC(fs, o, 0, func->upvalues[i].info, 0);

-  }

-}

-

-

-static void open_func (LexState *ls, FuncState *fs) {

-  Proto *f = luaF_newproto(ls->L);

-  fs->f = f;

-  fs->prev = ls->fs;  /* linked list of funcstates */

-  fs->ls = ls;

-  fs->L = ls->L;

-  ls->fs = fs;

-  fs->pc = 0;

-  fs->lasttarget = 0;

-  fs->jpc = NO_JUMP;

-  fs->freereg = 0;

-  fs->nk = 0;

-  fs->h = luaH_new(ls->L, 0, 0);

-  fs->np = 0;

-  fs->nlocvars = 0;

-  fs->nactvar = 0;

-  fs->bl = NULL;

-  f->source = ls->source;

-  f->maxstacksize = 2;  /* registers 0/1 are always valid */

-}

-

-

-static void close_func (LexState *ls) {

-  lua_State *L = ls->L;

-  FuncState *fs = ls->fs;

-  Proto *f = fs->f;

-  removevars(ls, 0);

-  luaK_codeABC(fs, OP_RETURN, 0, 1, 0);  /* final return */

-  luaM_reallocvector(L, f->code, f->sizecode, fs->pc, Instruction);

-  f->sizecode = fs->pc;

-  luaM_reallocvector(L, f->lineinfo, f->sizelineinfo, fs->pc, int);

-  f->sizelineinfo = fs->pc;

-  luaM_reallocvector(L, f->k, f->sizek, fs->nk, TObject);

-  f->sizek = fs->nk;

-  luaM_reallocvector(L, f->p, f->sizep, fs->np, Proto *);

-  f->sizep = fs->np;

-  luaM_reallocvector(L, f->locvars, f->sizelocvars, fs->nlocvars, LocVar);

-  f->sizelocvars = fs->nlocvars;

-  luaM_reallocvector(L, f->upvalues, f->sizeupvalues, f->nups, TString *);

-  f->sizeupvalues = f->nups;

-  lua_assert(luaG_checkcode(f));

-  lua_assert(fs->bl == NULL);

-  ls->fs = fs->prev;

-}

-

-

-Proto *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff) {

-  struct LexState lexstate;

-  struct FuncState funcstate;

-  lexstate.buff = buff;

-  lexstate.nestlevel = 0;

-  luaX_setinput(L, &lexstate, z, luaS_new(L, zname(z)));

-  open_func(&lexstate, &funcstate);

-  next(&lexstate);  /* read first token */

-  chunk(&lexstate);

-  check_condition(&lexstate, (lexstate.t.token == TK_EOS), "<eof> expected");

-  close_func(&lexstate);

-  lua_assert(funcstate.prev == NULL);

-  lua_assert(funcstate.f->nups == 0);

-  lua_assert(lexstate.nestlevel == 0);

-  return funcstate.f;

-}

-

-

-

-/*============================================================*/

-/* GRAMMAR RULES */

-/*============================================================*/

-

-

-static void luaY_field (LexState *ls, expdesc *v) {

-  /* field -> ['.' | ':'] NAME */

-  FuncState *fs = ls->fs;

-  expdesc key;

-  luaK_exp2anyreg(fs, v);

-  next(ls);  /* skip the dot or colon */

-  checkname(ls, &key);

-  luaK_indexed(fs, v, &key);

-}

-

-

-static void luaY_index (LexState *ls, expdesc *v) {

-  /* index -> '[' expr ']' */

-  next(ls);  /* skip the '[' */

-  expr(ls, v);

-  luaK_exp2val(ls->fs, v);

-  check(ls, ']');

-}

-

-

-/*

-** {======================================================================

-** Rules for Constructors

-** =======================================================================

-*/

-

-

-struct ConsControl {

-  expdesc v;  /* last list item read */

-  expdesc *t;  /* table descriptor */

-  int nh;  /* total number of `record' elements */

-  int na;  /* total number of array elements */

-  int tostore;  /* number of array elements pending to be stored */

-};

-

-

-static void recfield (LexState *ls, struct ConsControl *cc) {

-  /* recfield -> (NAME | `['exp1`]') = exp1 */

-  FuncState *fs = ls->fs;

-  int reg = ls->fs->freereg;

-  expdesc key, val;

-  if (ls->t.token == TK_NAME) {

-    luaX_checklimit(ls, cc->nh, MAX_INT, "items in a constructor");

-    cc->nh++;

-    checkname(ls, &key);

-  }

-  else  /* ls->t.token == '[' */

-    luaY_index(ls, &key);

-  check(ls, '=');

-  luaK_exp2RK(fs, &key);

-  expr(ls, &val);

-  luaK_codeABC(fs, OP_SETTABLE, cc->t->info, luaK_exp2RK(fs, &key),

-                                             luaK_exp2RK(fs, &val));

-  fs->freereg = reg;  /* free registers */

-}

-

-

-static void closelistfield (FuncState *fs, struct ConsControl *cc) {

-  if (cc->v.k == VVOID) return;  /* there is no list item */

-  luaK_exp2nextreg(fs, &cc->v);

-  cc->v.k = VVOID;

-  if (cc->tostore == LFIELDS_PER_FLUSH) {

-    luaK_codeABx(fs, OP_SETLIST, cc->t->info, cc->na-1);  /* flush */

-    cc->tostore = 0;  /* no more items pending */

-    fs->freereg = cc->t->info + 1;  /* free registers */

-  }

-}

-

-

-static void lastlistfield (FuncState *fs, struct ConsControl *cc) {

-  if (cc->tostore == 0) return;

-  if (cc->v.k == VCALL) {

-    luaK_setcallreturns(fs, &cc->v, LUA_MULTRET);

-    luaK_codeABx(fs, OP_SETLISTO, cc->t->info, cc->na-1);

-  }

-  else {

-    if (cc->v.k != VVOID)

-      luaK_exp2nextreg(fs, &cc->v);

-    luaK_codeABx(fs, OP_SETLIST, cc->t->info, cc->na-1);

-  }

-  fs->freereg = cc->t->info + 1;  /* free registers */

-}

-

-

-static void listfield (LexState *ls, struct ConsControl *cc) {

-  expr(ls, &cc->v);

-  luaX_checklimit(ls, cc->na, MAXARG_Bx, "items in a constructor");

-  cc->na++;

-  cc->tostore++;

-}

-

-

-static void constructor (LexState *ls, expdesc *t) {

-  /* constructor -> ?? */

-  FuncState *fs = ls->fs;

-  int line = ls->linenumber;

-  int pc = luaK_codeABC(fs, OP_NEWTABLE, 0, 0, 0);

-  struct ConsControl cc;

-  cc.na = cc.nh = cc.tostore = 0;

-  cc.t = t;

-  init_exp(t, VRELOCABLE, pc);

-  init_exp(&cc.v, VVOID, 0);  /* no value (yet) */

-  luaK_exp2nextreg(ls->fs, t);  /* fix it at stack top (for gc) */

-  check(ls, '{');

-  do {

-    lua_assert(cc.v.k == VVOID || cc.tostore > 0);

-    testnext(ls, ';');  /* compatibility only */

-    if (ls->t.token == '}') break;

-    closelistfield(fs, &cc);

-    switch(ls->t.token) {

-      case TK_NAME: {  /* may be listfields or recfields */

-        lookahead(ls);

-        if (ls->lookahead.token != '=')  /* expression? */

-          listfield(ls, &cc);

-        else

-          recfield(ls, &cc);

-        break;

-      }

-      case '[': {  /* constructor_item -> recfield */

-        recfield(ls, &cc);

-        break;

-      }

-      default: {  /* constructor_part -> listfield */

-        listfield(ls, &cc);

-        break;

-      }

-    }

-  } while (testnext(ls, ',') || testnext(ls, ';'));

-  check_match(ls, '}', '{', line);

-  lastlistfield(fs, &cc);

-  SETARG_B(fs->f->code[pc], luaO_int2fb(cc.na)); /* set initial array size */

-  SETARG_C(fs->f->code[pc], luaO_log2(cc.nh)+1);  /* set initial table size */

-}

-

-/* }====================================================================== */

-

-

-

-static void parlist (LexState *ls) {

-  /* parlist -> [ param { `,' param } ] */

-  int nparams = 0;

-  int dots = 0;

-  if (ls->t.token != ')') {  /* is `parlist' not empty? */

-    do {

-      switch (ls->t.token) {

-        case TK_DOTS: dots = 1; next(ls); break;

-        case TK_NAME: new_localvar(ls, str_checkname(ls), nparams++); break;

-        default: luaX_syntaxerror(ls, "<name> or `...' expected");

-      }

-    } while (!dots && testnext(ls, ','));

-  }

-  code_params(ls, nparams, dots);

-}

-

-

-static void body (LexState *ls, expdesc *e, int needself, int line) {

-  /* body ->  `(' parlist `)' chunk END */

-  FuncState new_fs;

-  open_func(ls, &new_fs);

-  new_fs.f->lineDefined = line;

-  check(ls, '(');

-  if (needself)

-    create_local(ls, "self");

-  parlist(ls);

-  check(ls, ')');

-  chunk(ls);

-  check_match(ls, TK_END, TK_FUNCTION, line);

-  close_func(ls);

-  pushclosure(ls, &new_fs, e);

-}

-

-

-static int explist1 (LexState *ls, expdesc *v) {

-  /* explist1 -> expr { `,' expr } */

-  int n = 1;  /* at least one expression */

-  expr(ls, v);

-  while (testnext(ls, ',')) {

-    luaK_exp2nextreg(ls->fs, v);

-    expr(ls, v);

-    n++;

-  }

-  return n;

-}

-

-

-static void funcargs (LexState *ls, expdesc *f) {

-  FuncState *fs = ls->fs;

-  expdesc args;

-  int base, nparams;

-  int line = ls->linenumber;

-  switch (ls->t.token) {

-    case '(': {  /* funcargs -> `(' [ explist1 ] `)' */

-      if (line != ls->lastline)

-        luaX_syntaxerror(ls,"ambiguous syntax (function call x new statement)");

-      next(ls);

-      if (ls->t.token == ')')  /* arg list is empty? */

-        args.k = VVOID;

-      else {

-        explist1(ls, &args);

-        luaK_setcallreturns(fs, &args, LUA_MULTRET);

-      }

-      check_match(ls, ')', '(', line);

-      break;

-    }

-    case '{': {  /* funcargs -> constructor */

-      constructor(ls, &args);

-      break;

-    }

-    case TK_STRING: {  /* funcargs -> STRING */

-      codestring(ls, &args, ls->t.seminfo.ts);

-      next(ls);  /* must use `seminfo' before `next' */

-      break;

-    }

-    default: {

-      luaX_syntaxerror(ls, "function arguments expected");

-      return;

-    }

-  }

-  lua_assert(f->k == VNONRELOC);

-  base = f->info;  /* base register for call */

-  if (args.k == VCALL)

-    nparams = LUA_MULTRET;  /* open call */

-  else {

-    if (args.k != VVOID)

-      luaK_exp2nextreg(fs, &args);  /* close last argument */

-    nparams = fs->freereg - (base+1);

-  }

-  init_exp(f, VCALL, luaK_codeABC(fs, OP_CALL, base, nparams+1, 2));

-  luaK_fixline(fs, line);

-  fs->freereg = base+1;  /* call remove function and arguments and leaves

-                            (unless changed) one result */

-}

-

-

-

-

-/*

-** {======================================================================

-** Expression parsing

-** =======================================================================

-*/

-

-

-static void prefixexp (LexState *ls, expdesc *v) {

-  /* prefixexp -> NAME | '(' expr ')' */

-  switch (ls->t.token) {

-    case '(': {

-      int line = ls->linenumber;

-      next(ls);

-      expr(ls, v);

-      check_match(ls, ')', '(', line);

-      luaK_dischargevars(ls->fs, v);

-      return;

-    }

-    case TK_NAME: {

-      singlevar(ls, v, 1);

-      return;

-    }

-#ifdef LUA_COMPATUPSYNTAX

-    case '%': {  /* for compatibility only */

-      TString *varname;

-      int line = ls->linenumber;

-      next(ls);  /* skip `%' */

-      varname = singlevar(ls, v, 1);

-      if (v->k != VUPVAL)

-        luaX_errorline(ls, "global upvalues are obsolete",

-                           getstr(varname), line);

-      return;

-    }

-#endif

-    default: {

-      luaX_syntaxerror(ls, "unexpected symbol");

-      return;

-    }

-  }

-}

-

-

-static void primaryexp (LexState *ls, expdesc *v) {

-  /* primaryexp ->

-        prefixexp { `.' NAME | `[' exp `]' | `:' NAME funcargs | funcargs } */

-  FuncState *fs = ls->fs;

-  prefixexp(ls, v);

-  for (;;) {

-    switch (ls->t.token) {

-      case '.': {  /* field */

-        luaY_field(ls, v);

-        break;

-      }

-      case '[': {  /* `[' exp1 `]' */

-        expdesc key;

-        luaK_exp2anyreg(fs, v);

-        luaY_index(ls, &key);

-        luaK_indexed(fs, v, &key);

-        break;

-      }

-      case ':': {  /* `:' NAME funcargs */

-        expdesc key;

-        next(ls);

-        checkname(ls, &key);

-        luaK_self(fs, v, &key);

-        funcargs(ls, v);

-        break;

-      }

-      case '(': case TK_STRING: case '{': {  /* funcargs */

-        luaK_exp2nextreg(fs, v);

-        funcargs(ls, v);

-        break;

-      }

-      default: return;

-    }

-  }

-}

-

-

-static void simpleexp (LexState *ls, expdesc *v) {

-  /* simpleexp -> NUMBER | STRING | NIL | constructor | FUNCTION body

-               | primaryexp */

-  switch (ls->t.token) {

-    case TK_NUMBER: {

-      init_exp(v, VK, luaK_numberK(ls->fs, ls->t.seminfo.r));

-      next(ls);  /* must use `seminfo' before `next' */

-      break;

-    }

-    case TK_STRING: {

-      codestring(ls, v, ls->t.seminfo.ts);

-      next(ls);  /* must use `seminfo' before `next' */

-      break;

-    }

-    case TK_NIL: {

-      init_exp(v, VNIL, 0);

-      next(ls);

-      break;

-    }

-    case TK_TRUE: {

-      init_exp(v, VTRUE, 0);

-      next(ls);

-      break;

-    }

-    case TK_FALSE: {

-      init_exp(v, VFALSE, 0);

-      next(ls);

-      break;

-    }

-    case '{': {  /* constructor */

-      constructor(ls, v);

-      break;

-    }

-    case TK_FUNCTION: {

-      next(ls);

-      body(ls, v, 0, ls->linenumber);

-      break;

-    }

-    default: {

-      primaryexp(ls, v);

-      break;

-    }

-  }

-}

-

-

-static UnOpr getunopr (int op) {

-  switch (op) {

-    case TK_NOT: return OPR_NOT;

-    case '-': return OPR_MINUS;

-    default: return OPR_NOUNOPR;

-  }

-}

-

-

-static BinOpr getbinopr (int op) {

-  switch (op) {

-    case '+': return OPR_ADD;

-    case '-': return OPR_SUB;

-    case '*': return OPR_MULT;

-    case '/': return OPR_DIV;

-    case '^': return OPR_POW;

-    case TK_CONCAT: return OPR_CONCAT;

-    case TK_NE: return OPR_NE;

-    case TK_EQ: return OPR_EQ;

-    case '<': return OPR_LT;

-    case TK_LE: return OPR_LE;

-    case '>': return OPR_GT;

-    case TK_GE: return OPR_GE;

-    case TK_AND: return OPR_AND;

-    case TK_OR: return OPR_OR;

-    default: return OPR_NOBINOPR;

-  }

-}

-

-

-static const struct {

-  lu_byte left;  /* left priority for each binary operator */

-  lu_byte right; /* right priority */

-} priority[] = {  /* ORDER OPR */

-   {6, 6}, {6, 6}, {7, 7}, {7, 7},  /* arithmetic */

-   {10, 9}, {5, 4},                 /* power and concat (right associative) */

-   {3, 3}, {3, 3},                  /* equality */

-   {3, 3}, {3, 3}, {3, 3}, {3, 3},  /* order */

-   {2, 2}, {1, 1}                   /* logical (and/or) */

-};

-

-#define UNARY_PRIORITY	8  /* priority for unary operators */

-

-

-/*

-** subexpr -> (simplexep | unop subexpr) { binop subexpr }

-** where `binop' is any binary operator with a priority higher than `limit'

-*/

-static BinOpr subexpr (LexState *ls, expdesc *v, int limit) {

-  BinOpr op;

-  UnOpr uop;

-  enterlevel(ls);

-  uop = getunopr(ls->t.token);

-  if (uop != OPR_NOUNOPR) {

-    next(ls);

-    subexpr(ls, v, UNARY_PRIORITY);

-    luaK_prefix(ls->fs, uop, v);

-  }

-  else simpleexp(ls, v);

-  /* expand while operators have priorities higher than `limit' */

-  op = getbinopr(ls->t.token);

-  while (op != OPR_NOBINOPR && cast(int, priority[op].left) > limit) {

-    expdesc v2;

-    BinOpr nextop;

-    next(ls);

-    luaK_infix(ls->fs, op, v);

-    /* read sub-expression with higher priority */

-    nextop = subexpr(ls, &v2, cast(int, priority[op].right));

-    luaK_posfix(ls->fs, op, v, &v2);

-    op = nextop;

-  }

-  leavelevel(ls);

-  return op;  /* return first untreated operator */

-}

-

-

-static void expr (LexState *ls, expdesc *v) {

-  subexpr(ls, v, -1);

-}

-

-/* }==================================================================== */

-

-

-

-/*

-** {======================================================================

-** Rules for Statements

-** =======================================================================

-*/

-

-

-static int block_follow (int token) {

-  switch (token) {

-    case TK_ELSE: case TK_ELSEIF: case TK_END:

-    case TK_UNTIL: case TK_EOS:

-      return 1;

-    default: return 0;

-  }

-}

-

-

-static void block (LexState *ls) {

-  /* block -> chunk */

-  FuncState *fs = ls->fs;

-  BlockCnt bl;

-  enterblock(fs, &bl, 0);

-  chunk(ls);

-  lua_assert(bl.breaklist == NO_JUMP);

-  leaveblock(fs);

-}

-

-

-/*

-** structure to chain all variables in the left-hand side of an

-** assignment

-*/

-struct LHS_assign {

-  struct LHS_assign *prev;

-  expdesc v;  /* variable (global, local, upvalue, or indexed) */

-};

-

-

-/*

-** check whether, in an assignment to a local variable, the local variable

-** is needed in a previous assignment (to a table). If so, save original

-** local value in a safe place and use this safe copy in the previous

-** assignment.

-*/

-static void check_conflict (LexState *ls, struct LHS_assign *lh, expdesc *v) {

-  FuncState *fs = ls->fs;

-  int extra = fs->freereg;  /* eventual position to save local variable */

-  int conflict = 0;

-  for (; lh; lh = lh->prev) {

-    if (lh->v.k == VINDEXED) {

-      if (lh->v.info == v->info) {  /* conflict? */

-        conflict = 1;

-        lh->v.info = extra;  /* previous assignment will use safe copy */

-      }

-      if (lh->v.aux == v->info) {  /* conflict? */

-        conflict = 1;

-        lh->v.aux = extra;  /* previous assignment will use safe copy */

-      }

-    }

-  }

-  if (conflict) {

-    luaK_codeABC(fs, OP_MOVE, fs->freereg, v->info, 0);  /* make copy */

-    luaK_reserveregs(fs, 1);

-  }

-}

-

-

-static void assignment (LexState *ls, struct LHS_assign *lh, int nvars) {

-  expdesc e;

-  check_condition(ls, VLOCAL <= lh->v.k && lh->v.k <= VINDEXED,

-                      "syntax error");

-  if (testnext(ls, ',')) {  /* assignment -> `,' primaryexp assignment */

-    struct LHS_assign nv;

-    nv.prev = lh;

-    primaryexp(ls, &nv.v);

-    if (nv.v.k == VLOCAL)

-      check_conflict(ls, lh, &nv.v);

-    assignment(ls, &nv, nvars+1);

-  }

-  else {  /* assignment -> `=' explist1 */

-    int nexps;

-    check(ls, '=');

-    nexps = explist1(ls, &e);

-    if (nexps != nvars) {

-      adjust_assign(ls, nvars, nexps, &e);

-      if (nexps > nvars)

-        ls->fs->freereg -= nexps - nvars;  /* remove extra values */

-    }

-    else {

-      luaK_setcallreturns(ls->fs, &e, 1);  /* close last expression */

-      luaK_storevar(ls->fs, &lh->v, &e);

-      return;  /* avoid default */

-    }

-  }

-  init_exp(&e, VNONRELOC, ls->fs->freereg-1);  /* default assignment */

-  luaK_storevar(ls->fs, &lh->v, &e);

-}

-

-

-static void cond (LexState *ls, expdesc *v) {

-  /* cond -> exp */

-  expr(ls, v);  /* read condition */

-  if (v->k == VNIL) v->k = VFALSE;  /* `falses' are all equal here */

-  luaK_goiftrue(ls->fs, v);

-  luaK_patchtohere(ls->fs, v->t);

-}

-

-

-/*

-** The while statement optimizes its code by coding the condition

-** after its body (and thus avoiding one jump in the loop).

-*/

-

-/*

-** maximum size of expressions for optimizing `while' code

-*/

-#ifndef MAXEXPWHILE

-#define MAXEXPWHILE	100

-#endif

-

-/*

-** the call `luaK_goiffalse' may grow the size of an expression by

-** at most this:

-*/

-#define EXTRAEXP	5

-

-static void whilestat (LexState *ls, int line) {

-  /* whilestat -> WHILE cond DO block END */

-  Instruction codeexp[MAXEXPWHILE + EXTRAEXP];

-  int lineexp;

-  int i;

-  int sizeexp;

-  FuncState *fs = ls->fs;

-  int whileinit, blockinit, expinit;

-  expdesc v;

-  BlockCnt bl;

-  next(ls);  /* skip WHILE */

-  whileinit = luaK_jump(fs);  /* jump to condition (which will be moved) */

-  expinit = luaK_getlabel(fs);

-  expr(ls, &v);  /* parse condition */

-  if (v.k == VK) v.k = VTRUE;  /* `trues' are all equal here */

-  lineexp = ls->linenumber;

-  luaK_goiffalse(fs, &v);

-  luaK_concat(fs, &v.f, fs->jpc);

-  fs->jpc = NO_JUMP;

-  sizeexp = fs->pc - expinit;  /* size of expression code */

-  if (sizeexp > MAXEXPWHILE) 

-    luaX_syntaxerror(ls, "`while' condition too complex");

-  for (i = 0; i < sizeexp; i++)  /* save `exp' code */

-    codeexp[i] = fs->f->code[expinit + i];

-  fs->pc = expinit;  /* remove `exp' code */

-  enterblock(fs, &bl, 1);

-  check(ls, TK_DO);

-  blockinit = luaK_getlabel(fs);

-  block(ls);

-  luaK_patchtohere(fs, whileinit);  /* initial jump jumps to here */

-  /* move `exp' back to code */

-  if (v.t != NO_JUMP) v.t += fs->pc - expinit;

-  if (v.f != NO_JUMP) v.f += fs->pc - expinit;

-  for (i=0; i<sizeexp; i++)

-    luaK_code(fs, codeexp[i], lineexp);

-  check_match(ls, TK_END, TK_WHILE, line);

-  leaveblock(fs);

-  luaK_patchlist(fs, v.t, blockinit);  /* true conditions go back to loop */

-  luaK_patchtohere(fs, v.f);  /* false conditions finish the loop */

-}

-

-

-static void repeatstat (LexState *ls, int line) {

-  /* repeatstat -> REPEAT block UNTIL cond */

-  FuncState *fs = ls->fs;

-  int repeat_init = luaK_getlabel(fs);

-  expdesc v;

-  BlockCnt bl;

-  enterblock(fs, &bl, 1);

-  next(ls);

-  block(ls);

-  check_match(ls, TK_UNTIL, TK_REPEAT, line);

-  cond(ls, &v);

-  luaK_patchlist(fs, v.f, repeat_init);

-  leaveblock(fs);

-}

-

-

-static int exp1 (LexState *ls) {

-  expdesc e;

-  int k;

-  expr(ls, &e);

-  k = e.k;

-  luaK_exp2nextreg(ls->fs, &e);

-  return k;

-}

-

-

-static void forbody (LexState *ls, int base, int line, int nvars, int isnum) {

-  BlockCnt bl;

-  FuncState *fs = ls->fs;

-  int prep, endfor;

-  adjustlocalvars(ls, nvars);  /* scope for all variables */

-  check(ls, TK_DO);

-  enterblock(fs, &bl, 1);  /* loop block */

-  prep = luaK_getlabel(fs);

-  block(ls);

-  luaK_patchtohere(fs, prep-1);

-  endfor = (isnum) ? luaK_codeAsBx(fs, OP_FORLOOP, base, NO_JUMP) :

-                     luaK_codeABC(fs, OP_TFORLOOP, base, 0, nvars - 3);

-  luaK_fixline(fs, line);  /* pretend that `OP_FOR' starts the loop */

-  luaK_patchlist(fs, (isnum) ? endfor : luaK_jump(fs), prep);

-  leaveblock(fs);

-}

-

-

-static void fornum (LexState *ls, TString *varname, int line) {

-  /* fornum -> NAME = exp1,exp1[,exp1] DO body */

-  FuncState *fs = ls->fs;

-  int base = fs->freereg;

-  new_localvar(ls, varname, 0);

-  new_localvarstr(ls, "(for limit)", 1);

-  new_localvarstr(ls, "(for step)", 2);

-  check(ls, '=');

-  exp1(ls);  /* initial value */

-  check(ls, ',');

-  exp1(ls);  /* limit */

-  if (testnext(ls, ','))

-    exp1(ls);  /* optional step */

-  else {  /* default step = 1 */

-    luaK_codeABx(fs, OP_LOADK, fs->freereg, luaK_numberK(fs, 1));

-    luaK_reserveregs(fs, 1);

-  }

-  luaK_codeABC(fs, OP_SUB, fs->freereg - 3, fs->freereg - 3, fs->freereg - 1);

-  luaK_jump(fs);

-  forbody(ls, base, line, 3, 1);

-}

-

-

-static void forlist (LexState *ls, TString *indexname) {

-  /* forlist -> NAME {,NAME} IN explist1 DO body */

-  FuncState *fs = ls->fs;

-  expdesc e;

-  int nvars = 0;

-  int line;

-  int base = fs->freereg;

-  new_localvarstr(ls, "(for generator)", nvars++);

-  new_localvarstr(ls, "(for state)", nvars++);

-  new_localvar(ls, indexname, nvars++);

-  while (testnext(ls, ','))

-    new_localvar(ls, str_checkname(ls), nvars++);

-  check(ls, TK_IN);

-  line = ls->linenumber;

-  adjust_assign(ls, nvars, explist1(ls, &e), &e);

-  luaK_checkstack(fs, 3);  /* extra space to call generator */

-  luaK_codeAsBx(fs, OP_TFORPREP, base, NO_JUMP);

-  forbody(ls, base, line, nvars, 0);

-}

-

-

-static void forstat (LexState *ls, int line) {

-  /* forstat -> fornum | forlist */

-  FuncState *fs = ls->fs;

-  TString *varname;

-  BlockCnt bl;

-  enterblock(fs, &bl, 0);  /* block to control variable scope */

-  next(ls);  /* skip `for' */

-  varname = str_checkname(ls);  /* first variable name */

-  switch (ls->t.token) {

-    case '=': fornum(ls, varname, line); break;

-    case ',': case TK_IN: forlist(ls, varname); break;

-    default: luaX_syntaxerror(ls, "`=' or `in' expected");

-  }

-  check_match(ls, TK_END, TK_FOR, line);

-  leaveblock(fs);

-}

-

-

-static void test_then_block (LexState *ls, expdesc *v) {

-  /* test_then_block -> [IF | ELSEIF] cond THEN block */

-  next(ls);  /* skip IF or ELSEIF */

-  cond(ls, v);

-  check(ls, TK_THEN);

-  block(ls);  /* `then' part */

-}

-

-

-static void ifstat (LexState *ls, int line) {

-  /* ifstat -> IF cond THEN block {ELSEIF cond THEN block} [ELSE block] END */

-  FuncState *fs = ls->fs;

-  expdesc v;

-  int escapelist = NO_JUMP;

-  test_then_block(ls, &v);  /* IF cond THEN block */

-  while (ls->t.token == TK_ELSEIF) {

-    luaK_concat(fs, &escapelist, luaK_jump(fs));

-    luaK_patchtohere(fs, v.f);

-    test_then_block(ls, &v);  /* ELSEIF cond THEN block */

-  }

-  if (ls->t.token == TK_ELSE) {

-    luaK_concat(fs, &escapelist, luaK_jump(fs));

-    luaK_patchtohere(fs, v.f);

-    next(ls);  /* skip ELSE (after patch, for correct line info) */

-    block(ls);  /* `else' part */

-  }

-  else

-    luaK_concat(fs, &escapelist, v.f);

-  luaK_patchtohere(fs, escapelist);

-  check_match(ls, TK_END, TK_IF, line);

-}

-

-

-static void localfunc (LexState *ls) {

-  expdesc v, b;

-  new_localvar(ls, str_checkname(ls), 0);

-  init_exp(&v, VLOCAL, ls->fs->freereg++);

-  adjustlocalvars(ls, 1);

-  body(ls, &b, 0, ls->linenumber);

-  luaK_storevar(ls->fs, &v, &b);

-}

-

-

-static void localstat (LexState *ls) {

-  /* stat -> LOCAL NAME {`,' NAME} [`=' explist1] */

-  int nvars = 0;

-  int nexps;

-  expdesc e;

-  do {

-    new_localvar(ls, str_checkname(ls), nvars++);

-  } while (testnext(ls, ','));

-  if (testnext(ls, '='))

-    nexps = explist1(ls, &e);

-  else {

-    e.k = VVOID;

-    nexps = 0;

-  }

-  adjust_assign(ls, nvars, nexps, &e);

-  adjustlocalvars(ls, nvars);

-}

-

-

-static int funcname (LexState *ls, expdesc *v) {

-  /* funcname -> NAME {field} [`:' NAME] */

-  int needself = 0;

-  singlevar(ls, v, 1);

-  while (ls->t.token == '.')

-    luaY_field(ls, v);

-  if (ls->t.token == ':') {

-    needself = 1;

-    luaY_field(ls, v);

-  }

-  return needself;

-}

-

-

-static void funcstat (LexState *ls, int line) {

-  /* funcstat -> FUNCTION funcname body */

-  int needself;

-  expdesc v, b;

-  next(ls);  /* skip FUNCTION */

-  needself = funcname(ls, &v);

-  body(ls, &b, needself, line);

-  luaK_storevar(ls->fs, &v, &b);

-  luaK_fixline(ls->fs, line);  /* definition `happens' in the first line */

-}

-

-

-static void exprstat (LexState *ls) {

-  /* stat -> func | assignment */

-  FuncState *fs = ls->fs;

-  struct LHS_assign v;

-  primaryexp(ls, &v.v);

-  if (v.v.k == VCALL) {  /* stat -> func */

-    luaK_setcallreturns(fs, &v.v, 0);  /* call statement uses no results */

-  }

-  else {  /* stat -> assignment */

-    v.prev = NULL;

-    assignment(ls, &v, 1);

-  }

-}

-

-

-static void retstat (LexState *ls) {

-  /* stat -> RETURN explist */

-  FuncState *fs = ls->fs;

-  expdesc e;

-  int first, nret;  /* registers with returned values */

-  next(ls);  /* skip RETURN */

-  if (block_follow(ls->t.token) || ls->t.token == ';')

-    first = nret = 0;  /* return no values */

-  else {

-    nret = explist1(ls, &e);  /* optional return values */

-    if (e.k == VCALL) {

-      luaK_setcallreturns(fs, &e, LUA_MULTRET);

-      if (nret == 1) {  /* tail call? */

-        SET_OPCODE(getcode(fs,&e), OP_TAILCALL);

-        lua_assert(GETARG_A(getcode(fs,&e)) == fs->nactvar);

-      }

-      first = fs->nactvar;

-      nret = LUA_MULTRET;  /* return all values */

-    }

-    else {

-      if (nret == 1)  /* only one single value? */

-        first = luaK_exp2anyreg(fs, &e);

-      else {

-        luaK_exp2nextreg(fs, &e);  /* values must go to the `stack' */

-        first = fs->nactvar;  /* return all `active' values */

-        lua_assert(nret == fs->freereg - first);

-      }

-    }

-  }

-  luaK_codeABC(fs, OP_RETURN, first, nret+1, 0);

-}

-

-

-static void breakstat (LexState *ls) {

-  /* stat -> BREAK [NAME] */

-  FuncState *fs = ls->fs;

-  BlockCnt *bl = fs->bl;

-  int upval = 0;

-  next(ls);  /* skip BREAK */

-  while (bl && !bl->isbreakable) {

-    upval |= bl->upval;

-    bl = bl->previous;

-  }

-  if (!bl)

-    luaX_syntaxerror(ls, "no loop to break");

-  if (upval)

-    luaK_codeABC(fs, OP_CLOSE, bl->nactvar, 0, 0);

-  luaK_concat(fs, &bl->breaklist, luaK_jump(fs));

-}

-

-

-static int statement (LexState *ls) {

-  int line = ls->linenumber;  /* may be needed for error messages */

-  switch (ls->t.token) {

-    case TK_IF: {  /* stat -> ifstat */

-      ifstat(ls, line);

-      return 0;

-    }

-    case TK_WHILE: {  /* stat -> whilestat */

-      whilestat(ls, line);

-      return 0;

-    }

-    case TK_DO: {  /* stat -> DO block END */

-      next(ls);  /* skip DO */

-      block(ls);

-      check_match(ls, TK_END, TK_DO, line);

-      return 0;

-    }

-    case TK_FOR: {  /* stat -> forstat */

-      forstat(ls, line);

-      return 0;

-    }

-    case TK_REPEAT: {  /* stat -> repeatstat */

-      repeatstat(ls, line);

-      return 0;

-    }

-    case TK_FUNCTION: {

-      funcstat(ls, line);  /* stat -> funcstat */

-      return 0;

-    }

-    case TK_LOCAL: {  /* stat -> localstat */

-      next(ls);  /* skip LOCAL */

-      if (testnext(ls, TK_FUNCTION))  /* local function? */

-        localfunc(ls);

-      else

-        localstat(ls);

-      return 0;

-    }

-    case TK_RETURN: {  /* stat -> retstat */

-      retstat(ls);

-      return 1;  /* must be last statement */

-    }

-    case TK_BREAK: {  /* stat -> breakstat */

-      breakstat(ls);

-      return 1;  /* must be last statement */

-    }

-    default: {

-      exprstat(ls);

-      return 0;  /* to avoid warnings */

-    }

-  }

-}

-

-

-static void chunk (LexState *ls) {

-  /* chunk -> { stat [`;'] } */

-  int islast = 0;

-  enterlevel(ls);

-  while (!islast && !block_follow(ls->t.token)) {

-    islast = statement(ls);

-    testnext(ls, ';');

-    lua_assert(ls->fs->freereg >= ls->fs->nactvar);

-    ls->fs->freereg = ls->fs->nactvar;  /* free registers */

-  }

-  leavelevel(ls);

-}

-

-/* }====================================================================== */

+/*
+** $Id: lparser.c,v 1.4 2004-11-27 21:46:07 pixel Exp $
+** Lua Parser
+** See Copyright Notice in lua.h
+*/
+
+
+#include <string.h>
+
+#define lparser_c
+
+#include "lua.h"
+
+#include "lcode.h"
+#include "ldebug.h"
+#include "lfunc.h"
+#include "llex.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lparser.h"
+#include "lstate.h"
+#include "lstring.h"
+
+
+
+
+#define getlocvar(fs, i)	((fs)->f->locvars[(fs)->actvar[i]])
+
+
+#define enterlevel(ls)	if (++(ls)->nestlevel > LUA_MAXPARSERLEVEL) \
+		luaX_syntaxerror(ls, "too many syntax levels");
+#define leavelevel(ls)	((ls)->nestlevel--)
+
+
+/*
+** nodes for block list (list of active blocks)
+*/
+typedef struct BlockCnt {
+  struct BlockCnt *previous;  /* chain */
+  int breaklist;  /* list of jumps out of this loop */
+  int nactvar;  /* # active local variables outside the breakable structure */
+  int upval;  /* true if some variable in the block is an upvalue */
+  int isbreakable;  /* true if `block' is a loop */
+} BlockCnt;
+
+
+
+/*
+** prototypes for recursive non-terminal functions
+*/
+static void chunk (LexState *ls);
+static void expr (LexState *ls, expdesc *v);
+
+
+
+static void next (LexState *ls) {
+  ls->lastline = ls->linenumber;
+  if (ls->lookahead.token != TK_EOS) {  /* is there a look-ahead token? */
+    ls->t = ls->lookahead;  /* use this one */
+    ls->lookahead.token = TK_EOS;  /* and discharge it */
+  }
+  else
+    ls->t.token = luaX_lex(ls, &ls->t.seminfo);  /* read next token */
+}
+
+
+static void lookahead (LexState *ls) {
+  lua_assert(ls->lookahead.token == TK_EOS);
+  ls->lookahead.token = luaX_lex(ls, &ls->lookahead.seminfo);
+}
+
+
+static void error_expected (LexState *ls, int token) {
+  luaX_syntaxerror(ls,
+         luaO_pushfstring(ls->L, "`%s' expected", luaX_token2str(ls, token)));
+}
+
+
+static int testnext (LexState *ls, int c) {
+  if (ls->t.token == c) {
+    next(ls);
+    return 1;
+  }
+  else return 0;
+}
+
+
+static void check (LexState *ls, int c) {
+  if (!testnext(ls, c))
+    error_expected(ls, c);
+}
+
+
+#define check_condition(ls,c,msg)	{ if (!(c)) luaX_syntaxerror(ls, msg); }
+
+
+
+static void check_match (LexState *ls, int what, int who, int where) {
+  if (!testnext(ls, what)) {
+    if (where == ls->linenumber)
+      error_expected(ls, what);
+    else {
+      luaX_syntaxerror(ls, luaO_pushfstring(ls->L,
+             "`%s' expected (to close `%s' at line %d)",
+              luaX_token2str(ls, what), luaX_token2str(ls, who), where));
+    }
+  }
+}
+
+
+static TString *str_checkname (LexState *ls) {
+  TString *ts;
+  check_condition(ls, (ls->t.token == TK_NAME), "<name> expected");
+  ts = ls->t.seminfo.ts;
+  next(ls);
+  return ts;
+}
+
+
+static void init_exp (expdesc *e, expkind k, int i) {
+  e->f = e->t = NO_JUMP;
+  e->k = k;
+  e->info = i;
+}
+
+
+static void codestring (LexState *ls, expdesc *e, TString *s) {
+  init_exp(e, VK, luaK_stringK(ls->fs, s));
+}
+
+
+static void checkname(LexState *ls, expdesc *e) {
+  codestring(ls, e, str_checkname(ls));
+}
+
+
+static int luaI_registerlocalvar (LexState *ls, TString *varname) {
+  FuncState *fs = ls->fs;
+  Proto *f = fs->f;
+  luaM_growvector(ls->L, f->locvars, fs->nlocvars, f->sizelocvars,
+                  LocVar, MAX_INT, "");
+  f->locvars[fs->nlocvars].varname = varname;
+  return fs->nlocvars++;
+}
+
+
+static void new_localvar (LexState *ls, TString *name, int n) {
+  FuncState *fs = ls->fs;
+  luaX_checklimit(ls, fs->nactvar+n+1, MAXVARS, "local variables");
+  fs->actvar[fs->nactvar+n] = luaI_registerlocalvar(ls, name);
+}
+
+
+static void adjustlocalvars (LexState *ls, int nvars) {
+  FuncState *fs = ls->fs;
+  fs->nactvar += nvars;
+  for (; nvars; nvars--) {
+    getlocvar(fs, fs->nactvar - nvars).startpc = fs->pc;
+  }
+}
+
+
+static void removevars (LexState *ls, int tolevel) {
+  FuncState *fs = ls->fs;
+  while (fs->nactvar > tolevel)
+    getlocvar(fs, --fs->nactvar).endpc = fs->pc;
+}
+
+
+static void new_localvarstr (LexState *ls, const char *name, int n) {
+  new_localvar(ls, luaS_new(ls->L, name), n);
+}
+
+
+static void create_local (LexState *ls, const char *name) {
+  new_localvarstr(ls, name, 0);
+  adjustlocalvars(ls, 1);
+}
+
+
+static int indexupvalue (FuncState *fs, TString *name, expdesc *v) {
+  int i;
+  Proto *f = fs->f;
+  for (i=0; i<f->nups; i++) {
+    if (fs->upvalues[i].k == v->k && fs->upvalues[i].info == v->info) {
+      lua_assert(fs->f->upvalues[i] == name);
+      return i;
+    }
+  }
+  /* new one */
+  luaX_checklimit(fs->ls, f->nups + 1, MAXUPVALUES, "upvalues");
+  luaM_growvector(fs->L, fs->f->upvalues, f->nups, fs->f->sizeupvalues,
+                  TString *, MAX_INT, "");
+  fs->f->upvalues[f->nups] = name;
+  fs->upvalues[f->nups] = *v;
+  return f->nups++;
+}
+
+
+static int searchvar (FuncState *fs, TString *n) {
+  int i;
+  for (i=fs->nactvar-1; i >= 0; i--) {
+    if (n == getlocvar(fs, i).varname)
+      return i;
+  }
+  return -1;  /* not found */
+}
+
+
+static void markupval (FuncState *fs, int level) {
+  BlockCnt *bl = fs->bl;
+  while (bl && bl->nactvar > level) bl = bl->previous;
+  if (bl) bl->upval = 1;
+}
+
+
+static void singlevaraux (FuncState *fs, TString *n, expdesc *var, int base) {
+  if (fs == NULL)  /* no more levels? */
+    init_exp(var, VGLOBAL, NO_REG);  /* default is global variable */
+  else {
+    int v = searchvar(fs, n);  /* look up at current level */
+    if (v >= 0) {
+      init_exp(var, VLOCAL, v);
+      if (!base)
+        markupval(fs, v);  /* local will be used as an upval */
+    }
+    else {  /* not found at current level; try upper one */
+      singlevaraux(fs->prev, n, var, 0);
+      if (var->k == VGLOBAL) {
+        if (base)
+          var->info = luaK_stringK(fs, n);  /* info points to global name */
+      }
+      else {  /* LOCAL or UPVAL */
+        var->info = indexupvalue(fs, n, var);
+        var->k = VUPVAL;  /* upvalue in this level */
+      }
+    }
+  }
+}
+
+
+static TString *singlevar (LexState *ls, expdesc *var, int base) {
+  TString *varname = str_checkname(ls);
+  singlevaraux(ls->fs, varname, var, base);
+  return varname;
+}
+
+
+static void adjust_assign (LexState *ls, int nvars, int nexps, expdesc *e) {
+  FuncState *fs = ls->fs;
+  int extra = nvars - nexps;
+  if (e->k == VCALL) {
+    extra++;  /* includes call itself */
+    if (extra <= 0) extra = 0;
+    else luaK_reserveregs(fs, extra-1);
+    luaK_setcallreturns(fs, e, extra);  /* call provides the difference */
+  }
+  else {
+    if (e->k != VVOID) luaK_exp2nextreg(fs, e);  /* close last expression */
+    if (extra > 0) {
+      int reg = fs->freereg;
+      luaK_reserveregs(fs, extra);
+      luaK_nil(fs, reg, extra);
+    }
+  }
+}
+
+
+static void code_params (LexState *ls, int nparams, int dots) {
+  FuncState *fs = ls->fs;
+  adjustlocalvars(ls, nparams);
+  luaX_checklimit(ls, fs->nactvar, MAXPARAMS, "parameters");
+  fs->f->numparams = cast(lu_byte, fs->nactvar);
+  fs->f->is_vararg = cast(lu_byte, dots);
+  if (dots)
+    create_local(ls, "arg");
+  luaK_reserveregs(fs, fs->nactvar);  /* reserve register for parameters */
+}
+
+
+static void enterblock (FuncState *fs, BlockCnt *bl, int isbreakable) {
+  bl->breaklist = NO_JUMP;
+  bl->isbreakable = isbreakable;
+  bl->nactvar = fs->nactvar;
+  bl->upval = 0;
+  bl->previous = fs->bl;
+  fs->bl = bl;
+  lua_assert(fs->freereg == fs->nactvar);
+}
+
+
+static void leaveblock (FuncState *fs) {
+  BlockCnt *bl = fs->bl;
+  fs->bl = bl->previous;
+  removevars(fs->ls, bl->nactvar);
+  if (bl->upval)
+    luaK_codeABC(fs, OP_CLOSE, bl->nactvar, 0, 0);
+  lua_assert(bl->nactvar == fs->nactvar);
+  fs->freereg = fs->nactvar;  /* free registers */
+  luaK_patchtohere(fs, bl->breaklist);
+}
+
+
+static void pushclosure (LexState *ls, FuncState *func, expdesc *v) {
+  FuncState *fs = ls->fs;
+  Proto *f = fs->f;
+  int i;
+  luaM_growvector(ls->L, f->p, fs->np, f->sizep, Proto *,
+                  MAXARG_Bx, "constant table overflow");
+  f->p[fs->np++] = func->f;
+  init_exp(v, VRELOCABLE, luaK_codeABx(fs, OP_CLOSURE, 0, fs->np-1));
+  for (i=0; i<func->f->nups; i++) {
+    OpCode o = (func->upvalues[i].k == VLOCAL) ? OP_MOVE : OP_GETUPVAL;
+    luaK_codeABC(fs, o, 0, func->upvalues[i].info, 0);
+  }
+}
+
+
+static void open_func (LexState *ls, FuncState *fs) {
+  Proto *f = luaF_newproto(ls->L);
+  fs->f = f;
+  fs->prev = ls->fs;  /* linked list of funcstates */
+  fs->ls = ls;
+  fs->L = ls->L;
+  ls->fs = fs;
+  fs->pc = 0;
+  fs->lasttarget = 0;
+  fs->jpc = NO_JUMP;
+  fs->freereg = 0;
+  fs->nk = 0;
+  fs->h = luaH_new(ls->L, 0, 0);
+  fs->np = 0;
+  fs->nlocvars = 0;
+  fs->nactvar = 0;
+  fs->bl = NULL;
+  f->source = ls->source;
+  f->maxstacksize = 2;  /* registers 0/1 are always valid */
+}
+
+
+static void close_func (LexState *ls) {
+  lua_State *L = ls->L;
+  FuncState *fs = ls->fs;
+  Proto *f = fs->f;
+  removevars(ls, 0);
+  luaK_codeABC(fs, OP_RETURN, 0, 1, 0);  /* final return */
+  luaM_reallocvector(L, f->code, f->sizecode, fs->pc, Instruction);
+  f->sizecode = fs->pc;
+  luaM_reallocvector(L, f->lineinfo, f->sizelineinfo, fs->pc, int);
+  f->sizelineinfo = fs->pc;
+  luaM_reallocvector(L, f->k, f->sizek, fs->nk, TObject);
+  f->sizek = fs->nk;
+  luaM_reallocvector(L, f->p, f->sizep, fs->np, Proto *);
+  f->sizep = fs->np;
+  luaM_reallocvector(L, f->locvars, f->sizelocvars, fs->nlocvars, LocVar);
+  f->sizelocvars = fs->nlocvars;
+  luaM_reallocvector(L, f->upvalues, f->sizeupvalues, f->nups, TString *);
+  f->sizeupvalues = f->nups;
+  lua_assert(luaG_checkcode(f));
+  lua_assert(fs->bl == NULL);
+  ls->fs = fs->prev;
+}
+
+
+Proto *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff) {
+  struct LexState lexstate;
+  struct FuncState funcstate;
+  lexstate.buff = buff;
+  lexstate.nestlevel = 0;
+  luaX_setinput(L, &lexstate, z, luaS_new(L, zname(z)));
+  open_func(&lexstate, &funcstate);
+  next(&lexstate);  /* read first token */
+  chunk(&lexstate);
+  check_condition(&lexstate, (lexstate.t.token == TK_EOS), "<eof> expected");
+  close_func(&lexstate);
+  lua_assert(funcstate.prev == NULL);
+  lua_assert(funcstate.f->nups == 0);
+  lua_assert(lexstate.nestlevel == 0);
+  return funcstate.f;
+}
+
+
+
+/*============================================================*/
+/* GRAMMAR RULES */
+/*============================================================*/
+
+
+static void luaY_field (LexState *ls, expdesc *v) {
+  /* field -> ['.' | ':'] NAME */
+  FuncState *fs = ls->fs;
+  expdesc key;
+  luaK_exp2anyreg(fs, v);
+  next(ls);  /* skip the dot or colon */
+  checkname(ls, &key);
+  luaK_indexed(fs, v, &key);
+}
+
+
+static void luaY_index (LexState *ls, expdesc *v) {
+  /* index -> '[' expr ']' */
+  next(ls);  /* skip the '[' */
+  expr(ls, v);
+  luaK_exp2val(ls->fs, v);
+  check(ls, ']');
+}
+
+
+/*
+** {======================================================================
+** Rules for Constructors
+** =======================================================================
+*/
+
+
+struct ConsControl {
+  expdesc v;  /* last list item read */
+  expdesc *t;  /* table descriptor */
+  int nh;  /* total number of `record' elements */
+  int na;  /* total number of array elements */
+  int tostore;  /* number of array elements pending to be stored */
+};
+
+
+static void recfield (LexState *ls, struct ConsControl *cc) {
+  /* recfield -> (NAME | `['exp1`]') = exp1 */
+  FuncState *fs = ls->fs;
+  int reg = ls->fs->freereg;
+  expdesc key, val;
+  if (ls->t.token == TK_NAME) {
+    luaX_checklimit(ls, cc->nh, MAX_INT, "items in a constructor");
+    cc->nh++;
+    checkname(ls, &key);
+  }
+  else  /* ls->t.token == '[' */
+    luaY_index(ls, &key);
+  check(ls, '=');
+  luaK_exp2RK(fs, &key);
+  expr(ls, &val);
+  luaK_codeABC(fs, OP_SETTABLE, cc->t->info, luaK_exp2RK(fs, &key),
+                                             luaK_exp2RK(fs, &val));
+  fs->freereg = reg;  /* free registers */
+}
+
+
+static void closelistfield (FuncState *fs, struct ConsControl *cc) {
+  if (cc->v.k == VVOID) return;  /* there is no list item */
+  luaK_exp2nextreg(fs, &cc->v);
+  cc->v.k = VVOID;
+  if (cc->tostore == LFIELDS_PER_FLUSH) {
+    luaK_codeABx(fs, OP_SETLIST, cc->t->info, cc->na-1);  /* flush */
+    cc->tostore = 0;  /* no more items pending */
+    fs->freereg = cc->t->info + 1;  /* free registers */
+  }
+}
+
+
+static void lastlistfield (FuncState *fs, struct ConsControl *cc) {
+  if (cc->tostore == 0) return;
+  if (cc->v.k == VCALL) {
+    luaK_setcallreturns(fs, &cc->v, LUA_MULTRET);
+    luaK_codeABx(fs, OP_SETLISTO, cc->t->info, cc->na-1);
+  }
+  else {
+    if (cc->v.k != VVOID)
+      luaK_exp2nextreg(fs, &cc->v);
+    luaK_codeABx(fs, OP_SETLIST, cc->t->info, cc->na-1);
+  }
+  fs->freereg = cc->t->info + 1;  /* free registers */
+}
+
+
+static void listfield (LexState *ls, struct ConsControl *cc) {
+  expr(ls, &cc->v);
+  luaX_checklimit(ls, cc->na, MAXARG_Bx, "items in a constructor");
+  cc->na++;
+  cc->tostore++;
+}
+
+
+static void constructor (LexState *ls, expdesc *t) {
+  /* constructor -> ?? */
+  FuncState *fs = ls->fs;
+  int line = ls->linenumber;
+  int pc = luaK_codeABC(fs, OP_NEWTABLE, 0, 0, 0);
+  struct ConsControl cc;
+  cc.na = cc.nh = cc.tostore = 0;
+  cc.t = t;
+  init_exp(t, VRELOCABLE, pc);
+  init_exp(&cc.v, VVOID, 0);  /* no value (yet) */
+  luaK_exp2nextreg(ls->fs, t);  /* fix it at stack top (for gc) */
+  check(ls, '{');
+  do {
+    lua_assert(cc.v.k == VVOID || cc.tostore > 0);
+    testnext(ls, ';');  /* compatibility only */
+    if (ls->t.token == '}') break;
+    closelistfield(fs, &cc);
+    switch(ls->t.token) {
+      case TK_NAME: {  /* may be listfields or recfields */
+        lookahead(ls);
+        if (ls->lookahead.token != '=')  /* expression? */
+          listfield(ls, &cc);
+        else
+          recfield(ls, &cc);
+        break;
+      }
+      case '[': {  /* constructor_item -> recfield */
+        recfield(ls, &cc);
+        break;
+      }
+      default: {  /* constructor_part -> listfield */
+        listfield(ls, &cc);
+        break;
+      }
+    }
+  } while (testnext(ls, ',') || testnext(ls, ';'));
+  check_match(ls, '}', '{', line);
+  lastlistfield(fs, &cc);
+  SETARG_B(fs->f->code[pc], luaO_int2fb(cc.na)); /* set initial array size */
+  SETARG_C(fs->f->code[pc], luaO_log2(cc.nh)+1);  /* set initial table size */
+}
+
+/* }====================================================================== */
+
+
+
+static void parlist (LexState *ls) {
+  /* parlist -> [ param { `,' param } ] */
+  int nparams = 0;
+  int dots = 0;
+  if (ls->t.token != ')') {  /* is `parlist' not empty? */
+    do {
+      switch (ls->t.token) {
+        case TK_DOTS: dots = 1; next(ls); break;
+        case TK_NAME: new_localvar(ls, str_checkname(ls), nparams++); break;
+        default: luaX_syntaxerror(ls, "<name> or `...' expected");
+      }
+    } while (!dots && testnext(ls, ','));
+  }
+  code_params(ls, nparams, dots);
+}
+
+
+static void body (LexState *ls, expdesc *e, int needself, int line) {
+  /* body ->  `(' parlist `)' chunk END */
+  FuncState new_fs;
+  open_func(ls, &new_fs);
+  new_fs.f->lineDefined = line;
+  check(ls, '(');
+  if (needself)
+    create_local(ls, "self");
+  parlist(ls);
+  check(ls, ')');
+  chunk(ls);
+  check_match(ls, TK_END, TK_FUNCTION, line);
+  close_func(ls);
+  pushclosure(ls, &new_fs, e);
+}
+
+
+static int explist1 (LexState *ls, expdesc *v) {
+  /* explist1 -> expr { `,' expr } */
+  int n = 1;  /* at least one expression */
+  expr(ls, v);
+  while (testnext(ls, ',')) {
+    luaK_exp2nextreg(ls->fs, v);
+    expr(ls, v);
+    n++;
+  }
+  return n;
+}
+
+
+static void funcargs (LexState *ls, expdesc *f) {
+  FuncState *fs = ls->fs;
+  expdesc args;
+  int base, nparams;
+  int line = ls->linenumber;
+  switch (ls->t.token) {
+    case '(': {  /* funcargs -> `(' [ explist1 ] `)' */
+      if (line != ls->lastline)
+        luaX_syntaxerror(ls,"ambiguous syntax (function call x new statement)");
+      next(ls);
+      if (ls->t.token == ')')  /* arg list is empty? */
+        args.k = VVOID;
+      else {
+        explist1(ls, &args);
+        luaK_setcallreturns(fs, &args, LUA_MULTRET);
+      }
+      check_match(ls, ')', '(', line);
+      break;
+    }
+    case '{': {  /* funcargs -> constructor */
+      constructor(ls, &args);
+      break;
+    }
+    case TK_STRING: {  /* funcargs -> STRING */
+      codestring(ls, &args, ls->t.seminfo.ts);
+      next(ls);  /* must use `seminfo' before `next' */
+      break;
+    }
+    default: {
+      luaX_syntaxerror(ls, "function arguments expected");
+      return;
+    }
+  }
+  lua_assert(f->k == VNONRELOC);
+  base = f->info;  /* base register for call */
+  if (args.k == VCALL)
+    nparams = LUA_MULTRET;  /* open call */
+  else {
+    if (args.k != VVOID)
+      luaK_exp2nextreg(fs, &args);  /* close last argument */
+    nparams = fs->freereg - (base+1);
+  }
+  init_exp(f, VCALL, luaK_codeABC(fs, OP_CALL, base, nparams+1, 2));
+  luaK_fixline(fs, line);
+  fs->freereg = base+1;  /* call remove function and arguments and leaves
+                            (unless changed) one result */
+}
+
+
+
+
+/*
+** {======================================================================
+** Expression parsing
+** =======================================================================
+*/
+
+
+static void prefixexp (LexState *ls, expdesc *v) {
+  /* prefixexp -> NAME | '(' expr ')' */
+  switch (ls->t.token) {
+    case '(': {
+      int line = ls->linenumber;
+      next(ls);
+      expr(ls, v);
+      check_match(ls, ')', '(', line);
+      luaK_dischargevars(ls->fs, v);
+      return;
+    }
+    case TK_NAME: {
+      singlevar(ls, v, 1);
+      return;
+    }
+#ifdef LUA_COMPATUPSYNTAX
+    case '%': {  /* for compatibility only */
+      TString *varname;
+      int line = ls->linenumber;
+      next(ls);  /* skip `%' */
+      varname = singlevar(ls, v, 1);
+      if (v->k != VUPVAL)
+        luaX_errorline(ls, "global upvalues are obsolete",
+                           getstr(varname), line);
+      return;
+    }
+#endif
+    default: {
+      luaX_syntaxerror(ls, "unexpected symbol");
+      return;
+    }
+  }
+}
+
+
+static void primaryexp (LexState *ls, expdesc *v) {
+  /* primaryexp ->
+        prefixexp { `.' NAME | `[' exp `]' | `:' NAME funcargs | funcargs } */
+  FuncState *fs = ls->fs;
+  prefixexp(ls, v);
+  for (;;) {
+    switch (ls->t.token) {
+      case '.': {  /* field */
+        luaY_field(ls, v);
+        break;
+      }
+      case '[': {  /* `[' exp1 `]' */
+        expdesc key;
+        luaK_exp2anyreg(fs, v);
+        luaY_index(ls, &key);
+        luaK_indexed(fs, v, &key);
+        break;
+      }
+      case ':': {  /* `:' NAME funcargs */
+        expdesc key;
+        next(ls);
+        checkname(ls, &key);
+        luaK_self(fs, v, &key);
+        funcargs(ls, v);
+        break;
+      }
+      case '(': case TK_STRING: case '{': {  /* funcargs */
+        luaK_exp2nextreg(fs, v);
+        funcargs(ls, v);
+        break;
+      }
+      default: return;
+    }
+  }
+}
+
+
+static void simpleexp (LexState *ls, expdesc *v) {
+  /* simpleexp -> NUMBER | STRING | NIL | constructor | FUNCTION body
+               | primaryexp */
+  switch (ls->t.token) {
+    case TK_NUMBER: {
+      init_exp(v, VK, luaK_numberK(ls->fs, ls->t.seminfo.r));
+      next(ls);  /* must use `seminfo' before `next' */
+      break;
+    }
+    case TK_STRING: {
+      codestring(ls, v, ls->t.seminfo.ts);
+      next(ls);  /* must use `seminfo' before `next' */
+      break;
+    }
+    case TK_NIL: {
+      init_exp(v, VNIL, 0);
+      next(ls);
+      break;
+    }
+    case TK_TRUE: {
+      init_exp(v, VTRUE, 0);
+      next(ls);
+      break;
+    }
+    case TK_FALSE: {
+      init_exp(v, VFALSE, 0);
+      next(ls);
+      break;
+    }
+    case '{': {  /* constructor */
+      constructor(ls, v);
+      break;
+    }
+    case TK_FUNCTION: {
+      next(ls);
+      body(ls, v, 0, ls->linenumber);
+      break;
+    }
+    default: {
+      primaryexp(ls, v);
+      break;
+    }
+  }
+}
+
+
+static UnOpr getunopr (int op) {
+  switch (op) {
+    case TK_NOT: return OPR_NOT;
+    case '-': return OPR_MINUS;
+    default: return OPR_NOUNOPR;
+  }
+}
+
+
+static BinOpr getbinopr (int op) {
+  switch (op) {
+    case '+': return OPR_ADD;
+    case '-': return OPR_SUB;
+    case '*': return OPR_MULT;
+    case '/': return OPR_DIV;
+    case '^': return OPR_POW;
+    case TK_CONCAT: return OPR_CONCAT;
+    case TK_NE: return OPR_NE;
+    case TK_EQ: return OPR_EQ;
+    case '<': return OPR_LT;
+    case TK_LE: return OPR_LE;
+    case '>': return OPR_GT;
+    case TK_GE: return OPR_GE;
+    case TK_AND: return OPR_AND;
+    case TK_OR: return OPR_OR;
+    default: return OPR_NOBINOPR;
+  }
+}
+
+
+static const struct {
+  lu_byte left;  /* left priority for each binary operator */
+  lu_byte right; /* right priority */
+} priority[] = {  /* ORDER OPR */
+   {6, 6}, {6, 6}, {7, 7}, {7, 7},  /* arithmetic */
+   {10, 9}, {5, 4},                 /* power and concat (right associative) */
+   {3, 3}, {3, 3},                  /* equality */
+   {3, 3}, {3, 3}, {3, 3}, {3, 3},  /* order */
+   {2, 2}, {1, 1}                   /* logical (and/or) */
+};
+
+#define UNARY_PRIORITY	8  /* priority for unary operators */
+
+
+/*
+** subexpr -> (simplexep | unop subexpr) { binop subexpr }
+** where `binop' is any binary operator with a priority higher than `limit'
+*/
+static BinOpr subexpr (LexState *ls, expdesc *v, int limit) {
+  BinOpr op;
+  UnOpr uop;
+  enterlevel(ls);
+  uop = getunopr(ls->t.token);
+  if (uop != OPR_NOUNOPR) {
+    next(ls);
+    subexpr(ls, v, UNARY_PRIORITY);
+    luaK_prefix(ls->fs, uop, v);
+  }
+  else simpleexp(ls, v);
+  /* expand while operators have priorities higher than `limit' */
+  op = getbinopr(ls->t.token);
+  while (op != OPR_NOBINOPR && cast(int, priority[op].left) > limit) {
+    expdesc v2;
+    BinOpr nextop;
+    next(ls);
+    luaK_infix(ls->fs, op, v);
+    /* read sub-expression with higher priority */
+    nextop = subexpr(ls, &v2, cast(int, priority[op].right));
+    luaK_posfix(ls->fs, op, v, &v2);
+    op = nextop;
+  }
+  leavelevel(ls);
+  return op;  /* return first untreated operator */
+}
+
+
+static void expr (LexState *ls, expdesc *v) {
+  subexpr(ls, v, -1);
+}
+
+/* }==================================================================== */
+
+
+
+/*
+** {======================================================================
+** Rules for Statements
+** =======================================================================
+*/
+
+
+static int block_follow (int token) {
+  switch (token) {
+    case TK_ELSE: case TK_ELSEIF: case TK_END:
+    case TK_UNTIL: case TK_EOS:
+      return 1;
+    default: return 0;
+  }
+}
+
+
+static void block (LexState *ls) {
+  /* block -> chunk */
+  FuncState *fs = ls->fs;
+  BlockCnt bl;
+  enterblock(fs, &bl, 0);
+  chunk(ls);
+  lua_assert(bl.breaklist == NO_JUMP);
+  leaveblock(fs);
+}
+
+
+/*
+** structure to chain all variables in the left-hand side of an
+** assignment
+*/
+struct LHS_assign {
+  struct LHS_assign *prev;
+  expdesc v;  /* variable (global, local, upvalue, or indexed) */
+};
+
+
+/*
+** check whether, in an assignment to a local variable, the local variable
+** is needed in a previous assignment (to a table). If so, save original
+** local value in a safe place and use this safe copy in the previous
+** assignment.
+*/
+static void check_conflict (LexState *ls, struct LHS_assign *lh, expdesc *v) {
+  FuncState *fs = ls->fs;
+  int extra = fs->freereg;  /* eventual position to save local variable */
+  int conflict = 0;
+  for (; lh; lh = lh->prev) {
+    if (lh->v.k == VINDEXED) {
+      if (lh->v.info == v->info) {  /* conflict? */
+        conflict = 1;
+        lh->v.info = extra;  /* previous assignment will use safe copy */
+      }
+      if (lh->v.aux == v->info) {  /* conflict? */
+        conflict = 1;
+        lh->v.aux = extra;  /* previous assignment will use safe copy */
+      }
+    }
+  }
+  if (conflict) {
+    luaK_codeABC(fs, OP_MOVE, fs->freereg, v->info, 0);  /* make copy */
+    luaK_reserveregs(fs, 1);
+  }
+}
+
+
+static void assignment (LexState *ls, struct LHS_assign *lh, int nvars) {
+  expdesc e;
+  check_condition(ls, VLOCAL <= lh->v.k && lh->v.k <= VINDEXED,
+                      "syntax error");
+  if (testnext(ls, ',')) {  /* assignment -> `,' primaryexp assignment */
+    struct LHS_assign nv;
+    nv.prev = lh;
+    primaryexp(ls, &nv.v);
+    if (nv.v.k == VLOCAL)
+      check_conflict(ls, lh, &nv.v);
+    assignment(ls, &nv, nvars+1);
+  }
+  else {  /* assignment -> `=' explist1 */
+    int nexps;
+    check(ls, '=');
+    nexps = explist1(ls, &e);
+    if (nexps != nvars) {
+      adjust_assign(ls, nvars, nexps, &e);
+      if (nexps > nvars)
+        ls->fs->freereg -= nexps - nvars;  /* remove extra values */
+    }
+    else {
+      luaK_setcallreturns(ls->fs, &e, 1);  /* close last expression */
+      luaK_storevar(ls->fs, &lh->v, &e);
+      return;  /* avoid default */
+    }
+  }
+  init_exp(&e, VNONRELOC, ls->fs->freereg-1);  /* default assignment */
+  luaK_storevar(ls->fs, &lh->v, &e);
+}
+
+
+static void cond (LexState *ls, expdesc *v) {
+  /* cond -> exp */
+  expr(ls, v);  /* read condition */
+  if (v->k == VNIL) v->k = VFALSE;  /* `falses' are all equal here */
+  luaK_goiftrue(ls->fs, v);
+  luaK_patchtohere(ls->fs, v->t);
+}
+
+
+/*
+** The while statement optimizes its code by coding the condition
+** after its body (and thus avoiding one jump in the loop).
+*/
+
+/*
+** maximum size of expressions for optimizing `while' code
+*/
+#ifndef MAXEXPWHILE
+#define MAXEXPWHILE	100
+#endif
+
+/*
+** the call `luaK_goiffalse' may grow the size of an expression by
+** at most this:
+*/
+#define EXTRAEXP	5
+
+static void whilestat (LexState *ls, int line) {
+  /* whilestat -> WHILE cond DO block END */
+  Instruction codeexp[MAXEXPWHILE + EXTRAEXP];
+  int lineexp;
+  int i;
+  int sizeexp;
+  FuncState *fs = ls->fs;
+  int whileinit, blockinit, expinit;
+  expdesc v;
+  BlockCnt bl;
+  next(ls);  /* skip WHILE */
+  whileinit = luaK_jump(fs);  /* jump to condition (which will be moved) */
+  expinit = luaK_getlabel(fs);
+  expr(ls, &v);  /* parse condition */
+  if (v.k == VK) v.k = VTRUE;  /* `trues' are all equal here */
+  lineexp = ls->linenumber;
+  luaK_goiffalse(fs, &v);
+  luaK_concat(fs, &v.f, fs->jpc);
+  fs->jpc = NO_JUMP;
+  sizeexp = fs->pc - expinit;  /* size of expression code */
+  if (sizeexp > MAXEXPWHILE) 
+    luaX_syntaxerror(ls, "`while' condition too complex");
+  for (i = 0; i < sizeexp; i++)  /* save `exp' code */
+    codeexp[i] = fs->f->code[expinit + i];
+  fs->pc = expinit;  /* remove `exp' code */
+  enterblock(fs, &bl, 1);
+  check(ls, TK_DO);
+  blockinit = luaK_getlabel(fs);
+  block(ls);
+  luaK_patchtohere(fs, whileinit);  /* initial jump jumps to here */
+  /* move `exp' back to code */
+  if (v.t != NO_JUMP) v.t += fs->pc - expinit;
+  if (v.f != NO_JUMP) v.f += fs->pc - expinit;
+  for (i=0; i<sizeexp; i++)
+    luaK_code(fs, codeexp[i], lineexp);
+  check_match(ls, TK_END, TK_WHILE, line);
+  leaveblock(fs);
+  luaK_patchlist(fs, v.t, blockinit);  /* true conditions go back to loop */
+  luaK_patchtohere(fs, v.f);  /* false conditions finish the loop */
+}
+
+
+static void repeatstat (LexState *ls, int line) {
+  /* repeatstat -> REPEAT block UNTIL cond */
+  FuncState *fs = ls->fs;
+  int repeat_init = luaK_getlabel(fs);
+  expdesc v;
+  BlockCnt bl;
+  enterblock(fs, &bl, 1);
+  next(ls);
+  block(ls);
+  check_match(ls, TK_UNTIL, TK_REPEAT, line);
+  cond(ls, &v);
+  luaK_patchlist(fs, v.f, repeat_init);
+  leaveblock(fs);
+}
+
+
+static int exp1 (LexState *ls) {
+  expdesc e;
+  int k;
+  expr(ls, &e);
+  k = e.k;
+  luaK_exp2nextreg(ls->fs, &e);
+  return k;
+}
+
+
+static void forbody (LexState *ls, int base, int line, int nvars, int isnum) {
+  BlockCnt bl;
+  FuncState *fs = ls->fs;
+  int prep, endfor;
+  adjustlocalvars(ls, nvars);  /* scope for all variables */
+  check(ls, TK_DO);
+  enterblock(fs, &bl, 1);  /* loop block */
+  prep = luaK_getlabel(fs);
+  block(ls);
+  luaK_patchtohere(fs, prep-1);
+  endfor = (isnum) ? luaK_codeAsBx(fs, OP_FORLOOP, base, NO_JUMP) :
+                     luaK_codeABC(fs, OP_TFORLOOP, base, 0, nvars - 3);
+  luaK_fixline(fs, line);  /* pretend that `OP_FOR' starts the loop */
+  luaK_patchlist(fs, (isnum) ? endfor : luaK_jump(fs), prep);
+  leaveblock(fs);
+}
+
+
+static void fornum (LexState *ls, TString *varname, int line) {
+  /* fornum -> NAME = exp1,exp1[,exp1] DO body */
+  FuncState *fs = ls->fs;
+  int base = fs->freereg;
+  new_localvar(ls, varname, 0);
+  new_localvarstr(ls, "(for limit)", 1);
+  new_localvarstr(ls, "(for step)", 2);
+  check(ls, '=');
+  exp1(ls);  /* initial value */
+  check(ls, ',');
+  exp1(ls);  /* limit */
+  if (testnext(ls, ','))
+    exp1(ls);  /* optional step */
+  else {  /* default step = 1 */
+    luaK_codeABx(fs, OP_LOADK, fs->freereg, luaK_numberK(fs, 1));
+    luaK_reserveregs(fs, 1);
+  }
+  luaK_codeABC(fs, OP_SUB, fs->freereg - 3, fs->freereg - 3, fs->freereg - 1);
+  luaK_jump(fs);
+  forbody(ls, base, line, 3, 1);
+}
+
+
+static void forlist (LexState *ls, TString *indexname) {
+  /* forlist -> NAME {,NAME} IN explist1 DO body */
+  FuncState *fs = ls->fs;
+  expdesc e;
+  int nvars = 0;
+  int line;
+  int base = fs->freereg;
+  new_localvarstr(ls, "(for generator)", nvars++);
+  new_localvarstr(ls, "(for state)", nvars++);
+  new_localvar(ls, indexname, nvars++);
+  while (testnext(ls, ','))
+    new_localvar(ls, str_checkname(ls), nvars++);
+  check(ls, TK_IN);
+  line = ls->linenumber;
+  adjust_assign(ls, nvars, explist1(ls, &e), &e);
+  luaK_checkstack(fs, 3);  /* extra space to call generator */
+  luaK_codeAsBx(fs, OP_TFORPREP, base, NO_JUMP);
+  forbody(ls, base, line, nvars, 0);
+}
+
+
+static void forstat (LexState *ls, int line) {
+  /* forstat -> fornum | forlist */
+  FuncState *fs = ls->fs;
+  TString *varname;
+  BlockCnt bl;
+  enterblock(fs, &bl, 0);  /* block to control variable scope */
+  next(ls);  /* skip `for' */
+  varname = str_checkname(ls);  /* first variable name */
+  switch (ls->t.token) {
+    case '=': fornum(ls, varname, line); break;
+    case ',': case TK_IN: forlist(ls, varname); break;
+    default: luaX_syntaxerror(ls, "`=' or `in' expected");
+  }
+  check_match(ls, TK_END, TK_FOR, line);
+  leaveblock(fs);
+}
+
+
+static void test_then_block (LexState *ls, expdesc *v) {
+  /* test_then_block -> [IF | ELSEIF] cond THEN block */
+  next(ls);  /* skip IF or ELSEIF */
+  cond(ls, v);
+  check(ls, TK_THEN);
+  block(ls);  /* `then' part */
+}
+
+
+static void ifstat (LexState *ls, int line) {
+  /* ifstat -> IF cond THEN block {ELSEIF cond THEN block} [ELSE block] END */
+  FuncState *fs = ls->fs;
+  expdesc v;
+  int escapelist = NO_JUMP;
+  test_then_block(ls, &v);  /* IF cond THEN block */
+  while (ls->t.token == TK_ELSEIF) {
+    luaK_concat(fs, &escapelist, luaK_jump(fs));
+    luaK_patchtohere(fs, v.f);
+    test_then_block(ls, &v);  /* ELSEIF cond THEN block */
+  }
+  if (ls->t.token == TK_ELSE) {
+    luaK_concat(fs, &escapelist, luaK_jump(fs));
+    luaK_patchtohere(fs, v.f);
+    next(ls);  /* skip ELSE (after patch, for correct line info) */
+    block(ls);  /* `else' part */
+  }
+  else
+    luaK_concat(fs, &escapelist, v.f);
+  luaK_patchtohere(fs, escapelist);
+  check_match(ls, TK_END, TK_IF, line);
+}
+
+
+static void localfunc (LexState *ls) {
+  expdesc v, b;
+  new_localvar(ls, str_checkname(ls), 0);
+  init_exp(&v, VLOCAL, ls->fs->freereg++);
+  adjustlocalvars(ls, 1);
+  body(ls, &b, 0, ls->linenumber);
+  luaK_storevar(ls->fs, &v, &b);
+}
+
+
+static void localstat (LexState *ls) {
+  /* stat -> LOCAL NAME {`,' NAME} [`=' explist1] */
+  int nvars = 0;
+  int nexps;
+  expdesc e;
+  do {
+    new_localvar(ls, str_checkname(ls), nvars++);
+  } while (testnext(ls, ','));
+  if (testnext(ls, '='))
+    nexps = explist1(ls, &e);
+  else {
+    e.k = VVOID;
+    nexps = 0;
+  }
+  adjust_assign(ls, nvars, nexps, &e);
+  adjustlocalvars(ls, nvars);
+}
+
+
+static int funcname (LexState *ls, expdesc *v) {
+  /* funcname -> NAME {field} [`:' NAME] */
+  int needself = 0;
+  singlevar(ls, v, 1);
+  while (ls->t.token == '.')
+    luaY_field(ls, v);
+  if (ls->t.token == ':') {
+    needself = 1;
+    luaY_field(ls, v);
+  }
+  return needself;
+}
+
+
+static void funcstat (LexState *ls, int line) {
+  /* funcstat -> FUNCTION funcname body */
+  int needself;
+  expdesc v, b;
+  next(ls);  /* skip FUNCTION */
+  needself = funcname(ls, &v);
+  body(ls, &b, needself, line);
+  luaK_storevar(ls->fs, &v, &b);
+  luaK_fixline(ls->fs, line);  /* definition `happens' in the first line */
+}
+
+
+static void exprstat (LexState *ls) {
+  /* stat -> func | assignment */
+  FuncState *fs = ls->fs;
+  struct LHS_assign v;
+  primaryexp(ls, &v.v);
+  if (v.v.k == VCALL) {  /* stat -> func */
+    luaK_setcallreturns(fs, &v.v, 0);  /* call statement uses no results */
+  }
+  else {  /* stat -> assignment */
+    v.prev = NULL;
+    assignment(ls, &v, 1);
+  }
+}
+
+
+static void retstat (LexState *ls) {
+  /* stat -> RETURN explist */
+  FuncState *fs = ls->fs;
+  expdesc e;
+  int first, nret;  /* registers with returned values */
+  next(ls);  /* skip RETURN */
+  if (block_follow(ls->t.token) || ls->t.token == ';')
+    first = nret = 0;  /* return no values */
+  else {
+    nret = explist1(ls, &e);  /* optional return values */
+    if (e.k == VCALL) {
+      luaK_setcallreturns(fs, &e, LUA_MULTRET);
+      if (nret == 1) {  /* tail call? */
+        SET_OPCODE(getcode(fs,&e), OP_TAILCALL);
+        lua_assert(GETARG_A(getcode(fs,&e)) == fs->nactvar);
+      }
+      first = fs->nactvar;
+      nret = LUA_MULTRET;  /* return all values */
+    }
+    else {
+      if (nret == 1)  /* only one single value? */
+        first = luaK_exp2anyreg(fs, &e);
+      else {
+        luaK_exp2nextreg(fs, &e);  /* values must go to the `stack' */
+        first = fs->nactvar;  /* return all `active' values */
+        lua_assert(nret == fs->freereg - first);
+      }
+    }
+  }
+  luaK_codeABC(fs, OP_RETURN, first, nret+1, 0);
+}
+
+
+static void breakstat (LexState *ls) {
+  /* stat -> BREAK [NAME] */
+  FuncState *fs = ls->fs;
+  BlockCnt *bl = fs->bl;
+  int upval = 0;
+  next(ls);  /* skip BREAK */
+  while (bl && !bl->isbreakable) {
+    upval |= bl->upval;
+    bl = bl->previous;
+  }
+  if (!bl)
+    luaX_syntaxerror(ls, "no loop to break");
+  if (upval)
+    luaK_codeABC(fs, OP_CLOSE, bl->nactvar, 0, 0);
+  luaK_concat(fs, &bl->breaklist, luaK_jump(fs));
+}
+
+
+static int statement (LexState *ls) {
+  int line = ls->linenumber;  /* may be needed for error messages */
+  switch (ls->t.token) {
+    case TK_IF: {  /* stat -> ifstat */
+      ifstat(ls, line);
+      return 0;
+    }
+    case TK_WHILE: {  /* stat -> whilestat */
+      whilestat(ls, line);
+      return 0;
+    }
+    case TK_DO: {  /* stat -> DO block END */
+      next(ls);  /* skip DO */
+      block(ls);
+      check_match(ls, TK_END, TK_DO, line);
+      return 0;
+    }
+    case TK_FOR: {  /* stat -> forstat */
+      forstat(ls, line);
+      return 0;
+    }
+    case TK_REPEAT: {  /* stat -> repeatstat */
+      repeatstat(ls, line);
+      return 0;
+    }
+    case TK_FUNCTION: {
+      funcstat(ls, line);  /* stat -> funcstat */
+      return 0;
+    }
+    case TK_LOCAL: {  /* stat -> localstat */
+      next(ls);  /* skip LOCAL */
+      if (testnext(ls, TK_FUNCTION))  /* local function? */
+        localfunc(ls);
+      else
+        localstat(ls);
+      return 0;
+    }
+    case TK_RETURN: {  /* stat -> retstat */
+      retstat(ls);
+      return 1;  /* must be last statement */
+    }
+    case TK_BREAK: {  /* stat -> breakstat */
+      breakstat(ls);
+      return 1;  /* must be last statement */
+    }
+    default: {
+      exprstat(ls);
+      return 0;  /* to avoid warnings */
+    }
+  }
+}
+
+
+static void chunk (LexState *ls) {
+  /* chunk -> { stat [`;'] } */
+  int islast = 0;
+  enterlevel(ls);
+  while (!islast && !block_follow(ls->t.token)) {
+    islast = statement(ls);
+    testnext(ls, ';');
+    lua_assert(ls->fs->freereg >= ls->fs->nactvar);
+    ls->fs->freereg = ls->fs->nactvar;  /* free registers */
+  }
+  leavelevel(ls);
+}
+
+/* }====================================================================== */
diff --git a/lib/lua/src/lstate.c b/lib/lua/src/lstate.c
index 53eb6aa..ccd6aeb 100644
--- a/lib/lua/src/lstate.c
+++ b/lib/lua/src/lstate.c
@@ -1,220 +1,220 @@
-/*

-** $Id: lstate.c,v 1.3 2004-11-27 21:35:20 pixel Exp $

-** Global State

-** See Copyright Notice in lua.h

-*/

-

-

-#include <stdlib.h>

-

-#define lstate_c

-

-#include "lua.h"

-

-#include "ldebug.h"

-#include "ldo.h"

-#include "lfunc.h"

-#include "lgc.h"

-#include "llex.h"

-#include "lmem.h"

-#include "lstate.h"

-#include "lstring.h"

-#include "ltable.h"

-#include "ltm.h"

-

-

-/*

-** macro to allow the inclusion of user information in Lua state

-*/

-#ifndef LUA_USERSTATE

-#define EXTRASPACE	0

-#else

-union UEXTRASPACE {L_Umaxalign a; LUA_USERSTATE b;};

-#define EXTRASPACE (sizeof(union UEXTRASPACE))

-#endif

-

-

-

-/*

-** you can change this function through the official API:

-** call `lua_setpanicf'

-*/

-static int default_panic (lua_State *L) {

-  UNUSED(L);

-  return 0;

-}

-

-

-static lua_State *mallocstate (lua_State *L) {

-  lu_byte *block = (lu_byte *)luaM_malloc(L, sizeof(lua_State) + EXTRASPACE);

-  if (block == NULL) return NULL;

-  else {

-    block += EXTRASPACE;

-    return cast(lua_State *, block);

-  }

-}

-

-

-static void freestate (lua_State *L, lua_State *L1) {

-  luaM_free(L, cast(lu_byte *, L1) - EXTRASPACE,

-               sizeof(lua_State) + EXTRASPACE);

-}

-

-

-static void stack_init (lua_State *L1, lua_State *L) {

-  L1->stack = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, TObject);

-  L1->stacksize = BASIC_STACK_SIZE + EXTRA_STACK;

-  L1->top = L1->stack;

-  L1->stack_last = L1->stack+(L1->stacksize - EXTRA_STACK)-1;

-  L1->base_ci = luaM_newvector(L, BASIC_CI_SIZE, CallInfo);

-  L1->ci = L1->base_ci;

-  L1->ci->state = CI_C;  /*  not a Lua function */

-  setnilvalue(L1->top++);  /* `function' entry for this `ci' */

-  L1->base = L1->ci->base = L1->top;

-  L1->ci->top = L1->top + LUA_MINSTACK;

-  L1->size_ci = BASIC_CI_SIZE;

-  L1->end_ci = L1->base_ci + L1->size_ci;

-}

-

-

-static void freestack (lua_State *L, lua_State *L1) {

-  luaM_freearray(L, L1->base_ci, L1->size_ci, CallInfo);

-  luaM_freearray(L, L1->stack, L1->stacksize, TObject);

-}

-

-

-/*

-** open parts that may cause memory-allocation errors

-*/

-static void f_luaopen (lua_State *L, void *ud) {

-  /* create a new global state */

-  global_State *g = luaM_new(NULL, global_State);

-  UNUSED(ud);

-  if (g == NULL) luaD_throw(L, LUA_ERRMEM);

-  L->l_G = g;

-  g->mainthread = L;

-  g->GCthreshold = 0;  /* mark it as unfinished state */

-  g->strt.size = 0;

-  g->strt.nuse = 0;

-  g->strt.hash = NULL;

-  setnilvalue(defaultmeta(L));

-  setnilvalue(registry(L));

-  luaZ_initbuffer(L, &g->buff);

-  g->panic = default_panic;

-  g->rootgc = NULL;

-  g->rootudata = NULL;

-  g->tmudata = NULL;

-  setnilvalue(gkey(g->dummynode));

-  setnilvalue(gval(g->dummynode));

-  g->dummynode->next = NULL;

-  g->nblocks = sizeof(lua_State) + sizeof(global_State);

-  stack_init(L, L);  /* init stack */

-  /* create default meta table with a dummy table, and then close the loop */

-  defaultmeta(L)->tt = LUA_TTABLE;

-  sethvalue(defaultmeta(L), luaH_new(L, 0, 0));

-  hvalue(defaultmeta(L))->metatable = hvalue(defaultmeta(L));

-  sethvalue(gt(L), luaH_new(L, 0, 4));  /* table of globals */

-  sethvalue(registry(L), luaH_new(L, 4, 4));  /* registry */

-  luaS_resize(L, MINSTRTABSIZE);  /* initial size of string table */

-  luaT_init(L);

-  luaX_init(L);

-  luaS_fix(luaS_newliteral(L, MEMERRMSG));

-  g->GCthreshold = 4*G(L)->nblocks;

-}

-

-

-static void preinit_state (lua_State *L) {

-  L->stack = NULL;

-  L->stacksize = 0;

-  L->errorJmp = NULL;

-  L->hook = NULL;

-  L->hookmask = L->hookinit = 0;

-  L->basehookcount = 0;

-  L->allowhook = 1;

-  resethookcount(L);

-  L->openupval = NULL;

-  L->size_ci = 0;

-  L->nCcalls = 0;

-  L->base_ci = L->ci = NULL;

-  L->errfunc = 0;

-  setnilvalue(gt(L));

-}

-

-

-static void close_state (lua_State *L) {

-  luaF_close(L, L->stack);  /* close all upvalues for this thread */

-  if (G(L)) {  /* close global state */

-    luaC_sweep(L, 1);  /* collect all elements */

-    lua_assert(G(L)->rootgc == NULL);

-    lua_assert(G(L)->rootudata == NULL);

-    luaS_freeall(L);

-    luaZ_freebuffer(L, &G(L)->buff);

-  }

-  freestack(L, L);

-  if (G(L)) {

-    lua_assert(G(L)->nblocks == sizeof(lua_State) + sizeof(global_State));

-    luaM_freelem(NULL, G(L));

-  }

-  freestate(NULL, L);

-}

-

-

-lua_State *luaE_newthread (lua_State *L) {

-  lua_State *L1 = mallocstate(L);

-  luaC_link(L, valtogco(L1), LUA_TTHREAD);

-  preinit_state(L1);

-  L1->l_G = L->l_G;

-  stack_init(L1, L);  /* init stack */

-  setobj2n(gt(L1), gt(L));  /* share table of globals */

-  return L1;

-}

-

-

-void luaE_freethread (lua_State *L, lua_State *L1) {

-  luaF_close(L1, L1->stack);  /* close all upvalues for this thread */

-  lua_assert(L1->openupval == NULL);

-  freestack(L, L1);

-  freestate(L, L1);

-}

-

-

-LUA_API lua_State *lua_open (void) {

-  lua_State *L = mallocstate(NULL);

-  if (L) {  /* allocation OK? */

-    L->tt = LUA_TTHREAD;

-    L->marked = 0;

-    L->next = L->gclist = NULL;

-    preinit_state(L);

-    L->l_G = NULL;

-    if (luaD_rawrunprotected(L, f_luaopen, NULL) != 0) {

-      /* memory allocation error: free partial state */

-      close_state(L);

-      L = NULL;

-    }

-  }

-  lua_userstateopen(L);

-  return L;

-}

-

-

-static void callallgcTM (lua_State *L, void *ud) {

-  UNUSED(ud);

-  luaC_callGCTM(L);  /* call GC metamethods for all udata */

-}

-

-

-LUA_API void lua_close (lua_State *L) {

-  lua_lock(L);

-  L = G(L)->mainthread;  /* only the main thread can be closed */

-  luaF_close(L, L->stack);  /* close all upvalues for this thread */

-  luaC_separateudata(L);  /* separate udata that have GC metamethods */

-  L->errfunc = 0;  /* no error function during GC metamethods */

-  do {  /* repeat until no more errors */

-    L->ci = L->base_ci;

-    L->base = L->top = L->ci->base;

-    L->nCcalls = 0;

-  } while (luaD_rawrunprotected(L, callallgcTM, NULL) != 0);

-  lua_assert(G(L)->tmudata == NULL);

-  close_state(L);

-}

-

+/*
+** $Id: lstate.c,v 1.4 2004-11-27 21:46:07 pixel Exp $
+** Global State
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdlib.h>
+
+#define lstate_c
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lgc.h"
+#include "llex.h"
+#include "lmem.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+
+
+/*
+** macro to allow the inclusion of user information in Lua state
+*/
+#ifndef LUA_USERSTATE
+#define EXTRASPACE	0
+#else
+union UEXTRASPACE {L_Umaxalign a; LUA_USERSTATE b;};
+#define EXTRASPACE (sizeof(union UEXTRASPACE))
+#endif
+
+
+
+/*
+** you can change this function through the official API:
+** call `lua_setpanicf'
+*/
+static int default_panic (lua_State *L) {
+  UNUSED(L);
+  return 0;
+}
+
+
+static lua_State *mallocstate (lua_State *L) {
+  lu_byte *block = (lu_byte *)luaM_malloc(L, sizeof(lua_State) + EXTRASPACE);
+  if (block == NULL) return NULL;
+  else {
+    block += EXTRASPACE;
+    return cast(lua_State *, block);
+  }
+}
+
+
+static void freestate (lua_State *L, lua_State *L1) {
+  luaM_free(L, cast(lu_byte *, L1) - EXTRASPACE,
+               sizeof(lua_State) + EXTRASPACE);
+}
+
+
+static void stack_init (lua_State *L1, lua_State *L) {
+  L1->stack = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, TObject);
+  L1->stacksize = BASIC_STACK_SIZE + EXTRA_STACK;
+  L1->top = L1->stack;
+  L1->stack_last = L1->stack+(L1->stacksize - EXTRA_STACK)-1;
+  L1->base_ci = luaM_newvector(L, BASIC_CI_SIZE, CallInfo);
+  L1->ci = L1->base_ci;
+  L1->ci->state = CI_C;  /*  not a Lua function */
+  setnilvalue(L1->top++);  /* `function' entry for this `ci' */
+  L1->base = L1->ci->base = L1->top;
+  L1->ci->top = L1->top + LUA_MINSTACK;
+  L1->size_ci = BASIC_CI_SIZE;
+  L1->end_ci = L1->base_ci + L1->size_ci;
+}
+
+
+static void freestack (lua_State *L, lua_State *L1) {
+  luaM_freearray(L, L1->base_ci, L1->size_ci, CallInfo);
+  luaM_freearray(L, L1->stack, L1->stacksize, TObject);
+}
+
+
+/*
+** open parts that may cause memory-allocation errors
+*/
+static void f_luaopen (lua_State *L, void *ud) {
+  /* create a new global state */
+  global_State *g = luaM_new(NULL, global_State);
+  UNUSED(ud);
+  if (g == NULL) luaD_throw(L, LUA_ERRMEM);
+  L->l_G = g;
+  g->mainthread = L;
+  g->GCthreshold = 0;  /* mark it as unfinished state */
+  g->strt.size = 0;
+  g->strt.nuse = 0;
+  g->strt.hash = NULL;
+  setnilvalue(defaultmeta(L));
+  setnilvalue(registry(L));
+  luaZ_initbuffer(L, &g->buff);
+  g->panic = default_panic;
+  g->rootgc = NULL;
+  g->rootudata = NULL;
+  g->tmudata = NULL;
+  setnilvalue(gkey(g->dummynode));
+  setnilvalue(gval(g->dummynode));
+  g->dummynode->next = NULL;
+  g->nblocks = sizeof(lua_State) + sizeof(global_State);
+  stack_init(L, L);  /* init stack */
+  /* create default meta table with a dummy table, and then close the loop */
+  defaultmeta(L)->tt = LUA_TTABLE;
+  sethvalue(defaultmeta(L), luaH_new(L, 0, 0));
+  hvalue(defaultmeta(L))->metatable = hvalue(defaultmeta(L));
+  sethvalue(gt(L), luaH_new(L, 0, 4));  /* table of globals */
+  sethvalue(registry(L), luaH_new(L, 4, 4));  /* registry */
+  luaS_resize(L, MINSTRTABSIZE);  /* initial size of string table */
+  luaT_init(L);
+  luaX_init(L);
+  luaS_fix(luaS_newliteral(L, MEMERRMSG));
+  g->GCthreshold = 4*G(L)->nblocks;
+}
+
+
+static void preinit_state (lua_State *L) {
+  L->stack = NULL;
+  L->stacksize = 0;
+  L->errorJmp = NULL;
+  L->hook = NULL;
+  L->hookmask = L->hookinit = 0;
+  L->basehookcount = 0;
+  L->allowhook = 1;
+  resethookcount(L);
+  L->openupval = NULL;
+  L->size_ci = 0;
+  L->nCcalls = 0;
+  L->base_ci = L->ci = NULL;
+  L->errfunc = 0;
+  setnilvalue(gt(L));
+}
+
+
+static void close_state (lua_State *L) {
+  luaF_close(L, L->stack);  /* close all upvalues for this thread */
+  if (G(L)) {  /* close global state */
+    luaC_sweep(L, 1);  /* collect all elements */
+    lua_assert(G(L)->rootgc == NULL);
+    lua_assert(G(L)->rootudata == NULL);
+    luaS_freeall(L);
+    luaZ_freebuffer(L, &G(L)->buff);
+  }
+  freestack(L, L);
+  if (G(L)) {
+    lua_assert(G(L)->nblocks == sizeof(lua_State) + sizeof(global_State));
+    luaM_freelem(NULL, G(L));
+  }
+  freestate(NULL, L);
+}
+
+
+lua_State *luaE_newthread (lua_State *L) {
+  lua_State *L1 = mallocstate(L);
+  luaC_link(L, valtogco(L1), LUA_TTHREAD);
+  preinit_state(L1);
+  L1->l_G = L->l_G;
+  stack_init(L1, L);  /* init stack */
+  setobj2n(gt(L1), gt(L));  /* share table of globals */
+  return L1;
+}
+
+
+void luaE_freethread (lua_State *L, lua_State *L1) {
+  luaF_close(L1, L1->stack);  /* close all upvalues for this thread */
+  lua_assert(L1->openupval == NULL);
+  freestack(L, L1);
+  freestate(L, L1);
+}
+
+
+LUA_API lua_State *lua_open (void) {
+  lua_State *L = mallocstate(NULL);
+  if (L) {  /* allocation OK? */
+    L->tt = LUA_TTHREAD;
+    L->marked = 0;
+    L->next = L->gclist = NULL;
+    preinit_state(L);
+    L->l_G = NULL;
+    if (luaD_rawrunprotected(L, f_luaopen, NULL) != 0) {
+      /* memory allocation error: free partial state */
+      close_state(L);
+      L = NULL;
+    }
+  }
+  lua_userstateopen(L);
+  return L;
+}
+
+
+static void callallgcTM (lua_State *L, void *ud) {
+  UNUSED(ud);
+  luaC_callGCTM(L);  /* call GC metamethods for all udata */
+}
+
+
+LUA_API void lua_close (lua_State *L) {
+  lua_lock(L);
+  L = G(L)->mainthread;  /* only the main thread can be closed */
+  luaF_close(L, L->stack);  /* close all upvalues for this thread */
+  luaC_separateudata(L);  /* separate udata that have GC metamethods */
+  L->errfunc = 0;  /* no error function during GC metamethods */
+  do {  /* repeat until no more errors */
+    L->ci = L->base_ci;
+    L->base = L->top = L->ci->base;
+    L->nCcalls = 0;
+  } while (luaD_rawrunprotected(L, callallgcTM, NULL) != 0);
+  lua_assert(G(L)->tmudata == NULL);
+  close_state(L);
+}
+
diff --git a/lib/lua/src/lstring.c b/lib/lua/src/lstring.c
index 863f510..56df94e 100644
--- a/lib/lua/src/lstring.c
+++ b/lib/lua/src/lstring.c
@@ -1,102 +1,102 @@
-/*

-** $Id: lstring.c,v 1.3 2004-11-27 21:35:20 pixel Exp $

-** String table (keeps all strings handled by Lua)

-** See Copyright Notice in lua.h

-*/

-

-

-#include <string.h>

-

-#define lstring_c

-

-#include "lua.h"

-

-#include "lmem.h"

-#include "lobject.h"

-#include "lstate.h"

-#include "lstring.h"

-

-

-

-void luaS_freeall (lua_State *L) {

-  lua_assert(G(L)->strt.nuse==0);

-  luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size, TString *);

-}

-

-

-void luaS_resize (lua_State *L, int newsize) {

-  GCObject **newhash = luaM_newvector(L, newsize, GCObject *);

-  stringtable *tb = &G(L)->strt;

-  int i;

-  for (i=0; i<newsize; i++) newhash[i] = NULL;

-  /* rehash */

-  for (i=0; i<tb->size; i++) {

-    GCObject *p = tb->hash[i];

-    while (p) {  /* for each node in the list */

-      GCObject *next = p->gch.next;  /* save next */

-      lu_hash h = gcotots(p)->tsv.hash;

-      int h1 = lmod(h, newsize);  /* new position */

-      lua_assert(cast(int, h%newsize) == lmod(h, newsize));

-      p->gch.next = newhash[h1];  /* chain it */

-      newhash[h1] = p;

-      p = next;

-    }

-  }

-  luaM_freearray(L, tb->hash, tb->size, TString *);

-  tb->size = newsize;

-  tb->hash = newhash;

-}

-

-

-static TString *newlstr (lua_State *L, const char *str, size_t l, lu_hash h) {

-  TString *ts = cast(TString *, luaM_malloc(L, sizestring(l)));

-  stringtable *tb;

-  ts->tsv.len = l;

-  ts->tsv.hash = h;

-  ts->tsv.marked = 0;

-  ts->tsv.tt = LUA_TSTRING;

-  ts->tsv.reserved = 0;

-  memcpy(ts+1, str, l*sizeof(char));

-  ((char *)(ts+1))[l] = '\0';  /* ending 0 */

-  tb = &G(L)->strt;

-  h = lmod(h, tb->size);

-  ts->tsv.next = tb->hash[h];  /* chain new entry */

-  tb->hash[h] = valtogco(ts);

-  tb->nuse++;

-  if (tb->nuse > cast(ls_nstr, tb->size) && tb->size <= MAX_INT/2)

-    luaS_resize(L, tb->size*2);  /* too crowded */

-  return ts;

-}

-

-

-TString *luaS_newlstr (lua_State *L, const char *str, size_t l) {

-  GCObject *o;

-  lu_hash h = (lu_hash)l;  /* seed */

-  size_t step = (l>>5)+1;  /* if string is too long, don't hash all its chars */

-  size_t l1;

-  for (l1=l; l1>=step; l1-=step)  /* compute hash */

-    h = h ^ ((h<<5)+(h>>2)+(unsigned char)(str[l1-1]));

-  for (o = G(L)->strt.hash[lmod(h, G(L)->strt.size)];

-       o != NULL;

-       o = o->gch.next) {

-    TString *ts = gcotots(o);

-    if (ts->tsv.len == l && (memcmp(str, getstr(ts), l) == 0))

-      return ts;

-  }

-  return newlstr(L, str, l, h);  /* not found */

-}

-

-

-Udata *luaS_newudata (lua_State *L, size_t s) {

-  Udata *u;

-  u = cast(Udata *, luaM_malloc(L, sizeudata(s)));

-  u->uv.marked = (1<<1);  /* is not finalized */

-  u->uv.tt = LUA_TUSERDATA;

-  u->uv.len = s;

-  u->uv.metatable = hvalue(defaultmeta(L));

-  /* chain it on udata list */

-  u->uv.next = G(L)->rootudata;

-  G(L)->rootudata = valtogco(u);

-  return u;

-}

-

+/*
+** $Id: lstring.c,v 1.4 2004-11-27 21:46:07 pixel Exp $
+** String table (keeps all strings handled by Lua)
+** See Copyright Notice in lua.h
+*/
+
+
+#include <string.h>
+
+#define lstring_c
+
+#include "lua.h"
+
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+
+
+
+void luaS_freeall (lua_State *L) {
+  lua_assert(G(L)->strt.nuse==0);
+  luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size, TString *);
+}
+
+
+void luaS_resize (lua_State *L, int newsize) {
+  GCObject **newhash = luaM_newvector(L, newsize, GCObject *);
+  stringtable *tb = &G(L)->strt;
+  int i;
+  for (i=0; i<newsize; i++) newhash[i] = NULL;
+  /* rehash */
+  for (i=0; i<tb->size; i++) {
+    GCObject *p = tb->hash[i];
+    while (p) {  /* for each node in the list */
+      GCObject *next = p->gch.next;  /* save next */
+      lu_hash h = gcotots(p)->tsv.hash;
+      int h1 = lmod(h, newsize);  /* new position */
+      lua_assert(cast(int, h%newsize) == lmod(h, newsize));
+      p->gch.next = newhash[h1];  /* chain it */
+      newhash[h1] = p;
+      p = next;
+    }
+  }
+  luaM_freearray(L, tb->hash, tb->size, TString *);
+  tb->size = newsize;
+  tb->hash = newhash;
+}
+
+
+static TString *newlstr (lua_State *L, const char *str, size_t l, lu_hash h) {
+  TString *ts = cast(TString *, luaM_malloc(L, sizestring(l)));
+  stringtable *tb;
+  ts->tsv.len = l;
+  ts->tsv.hash = h;
+  ts->tsv.marked = 0;
+  ts->tsv.tt = LUA_TSTRING;
+  ts->tsv.reserved = 0;
+  memcpy(ts+1, str, l*sizeof(char));
+  ((char *)(ts+1))[l] = '\0';  /* ending 0 */
+  tb = &G(L)->strt;
+  h = lmod(h, tb->size);
+  ts->tsv.next = tb->hash[h];  /* chain new entry */
+  tb->hash[h] = valtogco(ts);
+  tb->nuse++;
+  if (tb->nuse > cast(ls_nstr, tb->size) && tb->size <= MAX_INT/2)
+    luaS_resize(L, tb->size*2);  /* too crowded */
+  return ts;
+}
+
+
+TString *luaS_newlstr (lua_State *L, const char *str, size_t l) {
+  GCObject *o;
+  lu_hash h = (lu_hash)l;  /* seed */
+  size_t step = (l>>5)+1;  /* if string is too long, don't hash all its chars */
+  size_t l1;
+  for (l1=l; l1>=step; l1-=step)  /* compute hash */
+    h = h ^ ((h<<5)+(h>>2)+(unsigned char)(str[l1-1]));
+  for (o = G(L)->strt.hash[lmod(h, G(L)->strt.size)];
+       o != NULL;
+       o = o->gch.next) {
+    TString *ts = gcotots(o);
+    if (ts->tsv.len == l && (memcmp(str, getstr(ts), l) == 0))
+      return ts;
+  }
+  return newlstr(L, str, l, h);  /* not found */
+}
+
+
+Udata *luaS_newudata (lua_State *L, size_t s) {
+  Udata *u;
+  u = cast(Udata *, luaM_malloc(L, sizeudata(s)));
+  u->uv.marked = (1<<1);  /* is not finalized */
+  u->uv.tt = LUA_TUSERDATA;
+  u->uv.len = s;
+  u->uv.metatable = hvalue(defaultmeta(L));
+  /* chain it on udata list */
+  u->uv.next = G(L)->rootudata;
+  G(L)->rootudata = valtogco(u);
+  return u;
+}
+
diff --git a/lib/lua/src/ltable.c b/lib/lua/src/ltable.c
index 9f4cb6c..4969d84 100644
--- a/lib/lua/src/ltable.c
+++ b/lib/lua/src/ltable.c
@@ -1,509 +1,509 @@
-/*

-** $Id: ltable.c,v 1.3 2004-11-27 21:35:20 pixel Exp $

-** Lua tables (hash)

-** See Copyright Notice in lua.h

-*/

-

-

-/*

-** Implementation of tables (aka arrays, objects, or hash tables).

-** Tables keep its elements in two parts: an array part and a hash part.

-** Non-negative integer keys are all candidates to be kept in the array

-** part. The actual size of the array is the largest `n' such that at

-** least half the slots between 0 and n are in use.

-** Hash uses a mix of chained scatter table with Brent's variation.

-** A main invariant of these tables is that, if an element is not

-** in its main position (i.e. the `original' position that its hash gives

-** to it), then the colliding element is in its own main position.

-** In other words, there are collisions only when two elements have the

-** same main position (i.e. the same hash values for that table size).

-** Because of that, the load factor of these tables can be 100% without

-** performance penalties.

-*/

-

-#include <string.h>

-

-#define ltable_c

-

-#include "lua.h"

-

-#include "ldebug.h"

-#include "ldo.h"

-#include "lgc.h"

-#include "lmem.h"

-#include "lobject.h"

-#include "lstate.h"

-#include "ltable.h"

-

-

-/*

-** max size of array part is 2^MAXBITS

-*/

-#if BITS_INT > 26

-#define MAXBITS		24

-#else

-#define MAXBITS		(BITS_INT-2)

-#endif

-

-/* check whether `x' < 2^MAXBITS */

-#define toobig(x)	((((x)-1) >> MAXBITS) != 0)

-

-

-/* function to convert a lua_Number to int (with any rounding method) */

-#ifndef lua_number2int

-#define lua_number2int(i,n)	((i)=(int)(n))

-#endif

-

-

-#define hashpow2(t,n)      (gnode(t, lmod((n), sizenode(t))))

-  

-#define hashstr(t,str)  hashpow2(t, (str)->tsv.hash)

-#define hashboolean(t,p)        hashpow2(t, p)

-

-

-/*

-** for some types, it is better to avoid modulus by power of 2, as

-** they tend to have many 2 factors.

-*/

-#define hashmod(t,n)	(gnode(t, ((n) % ((sizenode(t)-1)|1))))

-

-

-#define hashpointer(t,p)	hashmod(t, IntPoint(p))

-

-

-/*

-** number of ints inside a lua_Number

-*/

-#define numints		cast(int, sizeof(lua_Number)/sizeof(int))

-

-

-/*

-** hash for lua_Numbers

-*/

-static Node *hashnum (const Table *t, lua_Number n) {

-  unsigned int a[numints];

-  int i;

-  n += 1;  /* normalize number (avoid -0) */

-  lua_assert(sizeof(a) <= sizeof(n));

-  memcpy(a, &n, sizeof(a));

-  for (i = 1; i < numints; i++) a[0] += a[i];

-  return hashmod(t, cast(lu_hash, a[0]));

-}

-

-

-

-/*

-** returns the `main' position of an element in a table (that is, the index

-** of its hash value)

-*/

-Node *luaH_mainposition (const Table *t, const TObject *key) {

-  switch (ttype(key)) {

-    case LUA_TNUMBER:

-      return hashnum(t, nvalue(key));

-    case LUA_TSTRING:

-      return hashstr(t, tsvalue(key));

-    case LUA_TBOOLEAN:

-      return hashboolean(t, bvalue(key));

-    case LUA_TLIGHTUSERDATA:

-      return hashpointer(t, pvalue(key));

-    default:

-      return hashpointer(t, gcvalue(key));

-  }

-}

-

-

-/*

-** returns the index for `key' if `key' is an appropriate key to live in

-** the array part of the table, -1 otherwise.

-*/

-static int arrayindex (const TObject *key) {

-  if (ttisnumber(key)) {

-    int k;

-    lua_number2int(k, (nvalue(key)));

-    if (cast(lua_Number, k) == nvalue(key) && k >= 1 && !toobig(k))

-      return k;

-  }

-  return -1;  /* `key' did not match some condition */

-}

-

-

-/*

-** returns the index of a `key' for table traversals. First goes all

-** elements in the array part, then elements in the hash part. The

-** beginning and end of a traversal are signalled by -1.

-*/

-static int luaH_index (lua_State *L, Table *t, StkId key) {

-  int i;

-  if (ttisnil(key)) return -1;  /* first iteration */

-  i = arrayindex(key);

-  if (0 <= i && i <= t->sizearray) {  /* is `key' inside array part? */

-    return i-1;  /* yes; that's the index (corrected to C) */

-  }

-  else {

-    const TObject *v = luaH_get(t, key);

-    if (v == &luaO_nilobject)

-      luaG_runerror(L, "invalid key for `next'");

-    i = cast(int, (cast(const lu_byte *, v) -

-                   cast(const lu_byte *, gval(gnode(t, 0)))) / sizeof(Node));

-    return i + t->sizearray;  /* hash elements are numbered after array ones */

-  }

-}

-

-

-int luaH_next (lua_State *L, Table *t, StkId key) {

-  int i = luaH_index(L, t, key);  /* find original element */

-  for (i++; i < t->sizearray; i++) {  /* try first array part */

-    if (!ttisnil(&t->array[i])) {  /* a non-nil value? */

-      setnvalue(key, cast(lua_Number, i+1));

-      setobj2s(key+1, &t->array[i]);

-      return 1;

-    }

-  }

-  for (i -= t->sizearray; i < sizenode(t); i++) {  /* then hash part */

-    if (!ttisnil(gval(gnode(t, i)))) {  /* a non-nil value? */

-      setobj2s(key, gkey(gnode(t, i)));

-      setobj2s(key+1, gval(gnode(t, i)));

-      return 1;

-    }

-  }

-  return 0;  /* no more elements */

-}

-

-

-/*

-** {=============================================================

-** Rehash

-** ==============================================================

-*/

-

-

-static void computesizes  (int nums[], int ntotal, int *narray, int *nhash) {

-  int i;

-  int a = nums[0];  /* number of elements smaller than 2^i */

-  int na = a;  /* number of elements to go to array part */

-  int n = (na == 0) ? -1 : 0;  /* (log of) optimal size for array part */

-  for (i = 1; a < *narray && *narray >= twoto(i-1); i++) {

-    if (nums[i] > 0) {

-      a += nums[i];

-      if (a >= twoto(i-1)) {  /* more than half elements in use? */

-        n = i;

-        na = a;

-      }

-    }

-  }

-  lua_assert(na <= *narray && *narray <= ntotal);

-  *nhash = ntotal - na;

-  *narray = (n == -1) ? 0 : twoto(n);

-  lua_assert(na <= *narray && na >= *narray/2);

-}

-

-

-static void numuse (const Table *t, int *narray, int *nhash) {

-  int nums[MAXBITS+1];

-  int i, lg;

-  int totaluse = 0;

-  /* count elements in array part */

-  for (i=0, lg=0; lg<=MAXBITS; lg++) {  /* for each slice [2^(lg-1) to 2^lg) */

-    int ttlg = twoto(lg);  /* 2^lg */

-    if (ttlg > t->sizearray) {

-      ttlg = t->sizearray;

-      if (i >= ttlg) break;

-    }

-    nums[lg] = 0;

-    for (; i<ttlg; i++) {

-      if (!ttisnil(&t->array[i])) {

-        nums[lg]++;

-        totaluse++;

-      }

-    }

-  }

-  for (; lg<=MAXBITS; lg++) nums[lg] = 0;  /* reset other counts */

-  *narray = totaluse;  /* all previous uses were in array part */

-  /* count elements in hash part */

-  i = sizenode(t);

-  while (i--) {

-    Node *n = &t->node[i];

-    if (!ttisnil(gval(n))) {

-      int k = arrayindex(gkey(n));

-      if (k >= 0) {  /* is `key' an appropriate array index? */

-        nums[luaO_log2(k-1)+1]++;  /* count as such */

-        (*narray)++;

-      }

-      totaluse++;

-    }

-  }

-  computesizes(nums, totaluse, narray, nhash);

-}

-

-

-static void setarrayvector (lua_State *L, Table *t, int size) {

-  int i;

-  luaM_reallocvector(L, t->array, t->sizearray, size, TObject);

-  for (i=t->sizearray; i<size; i++)

-     setnilvalue(&t->array[i]);

-  t->sizearray = size;

-}

-

-

-static void setnodevector (lua_State *L, Table *t, int lsize) {

-  int i;

-  int size = twoto(lsize);

-  if (lsize > MAXBITS)

-    luaG_runerror(L, "table overflow");

-  if (lsize == 0) {  /* no elements to hash part? */

-    t->node = G(L)->dummynode;  /* use common `dummynode' */

-    lua_assert(ttisnil(gkey(t->node)));  /* assert invariants: */

-    lua_assert(ttisnil(gval(t->node)));

-    lua_assert(t->node->next == NULL);  /* (`dummynode' must be empty) */

-  }

-  else {

-    t->node = luaM_newvector(L, size, Node);

-    for (i=0; i<size; i++) {

-      t->node[i].next = NULL;

-      setnilvalue(gkey(gnode(t, i)));

-      setnilvalue(gval(gnode(t, i)));

-    }

-  }

-  t->lsizenode = cast(lu_byte, lsize);

-  t->firstfree = gnode(t, size-1);  /* first free position to be used */

-}

-

-

-static void resize (lua_State *L, Table *t, int nasize, int nhsize) {

-  int i;

-  int oldasize = t->sizearray;

-  int oldhsize = t->lsizenode;

-  Node *nold;

-  Node temp[1];

-  if (oldhsize)

-    nold = t->node;  /* save old hash ... */

-  else {  /* old hash is `dummynode' */

-    lua_assert(t->node == G(L)->dummynode);

-    temp[0] = t->node[0];  /* copy it to `temp' */

-    nold = temp;

-    setnilvalue(gkey(G(L)->dummynode));  /* restate invariant */

-    setnilvalue(gval(G(L)->dummynode));

-    lua_assert(G(L)->dummynode->next == NULL);

-  }

-  if (nasize > oldasize)  /* array part must grow? */

-    setarrayvector(L, t, nasize);

-  /* create new hash part with appropriate size */

-  setnodevector(L, t, nhsize);  

-  /* re-insert elements */

-  if (nasize < oldasize) {  /* array part must shrink? */

-    t->sizearray = nasize;

-    /* re-insert elements from vanishing slice */

-    for (i=nasize; i<oldasize; i++) {

-      if (!ttisnil(&t->array[i]))

-        setobjt2t(luaH_setnum(L, t, i+1), &t->array[i]);

-    }

-    /* shrink array */

-    luaM_reallocvector(L, t->array, oldasize, nasize, TObject);

-  }

-  /* re-insert elements in hash part */

-  for (i = twoto(oldhsize) - 1; i >= 0; i--) {

-    Node *old = nold+i;

-    if (!ttisnil(gval(old)))

-      setobjt2t(luaH_set(L, t, gkey(old)), gval(old));

-  }

-  if (oldhsize)

-    luaM_freearray(L, nold, twoto(oldhsize), Node);  /* free old array */

-}

-

-

-static void rehash (lua_State *L, Table *t) {

-  int nasize, nhsize;

-  numuse(t, &nasize, &nhsize);  /* compute new sizes for array and hash parts */

-  resize(L, t, nasize, luaO_log2(nhsize)+1);

-}

-

-

-

-/*

-** }=============================================================

-*/

-

-

-Table *luaH_new (lua_State *L, int narray, int lnhash) {

-  Table *t = luaM_new(L, Table);

-  luaC_link(L, valtogco(t), LUA_TTABLE);

-  t->metatable = hvalue(defaultmeta(L));

-  t->flags = cast(lu_byte, ~0);

-  /* temporary values (kept only if some malloc fails) */

-  t->array = NULL;

-  t->sizearray = 0;

-  t->lsizenode = 0;

-  t->node = NULL;

-  setarrayvector(L, t, narray);

-  setnodevector(L, t, lnhash);

-  return t;

-}

-

-

-void luaH_free (lua_State *L, Table *t) {

-  if (t->lsizenode)

-    luaM_freearray(L, t->node, sizenode(t), Node);

-  luaM_freearray(L, t->array, t->sizearray, TObject);

-  luaM_freelem(L, t);

-}

-

-

-#if 0

-/*

-** try to remove an element from a hash table; cannot move any element

-** (because gc can call `remove' during a table traversal)

-*/

-void luaH_remove (Table *t, Node *e) {

-  Node *mp = luaH_mainposition(t, gkey(e));

-  if (e != mp) {  /* element not in its main position? */

-    while (mp->next != e) mp = mp->next;  /* find previous */

-    mp->next = e->next;  /* remove `e' from its list */

-  }

-  else {

-    if (e->next != NULL) ??

-  }

-  lua_assert(ttisnil(gval(node)));

-  setnilvalue(gkey(e));  /* clear node `e' */

-  e->next = NULL;

-}

-#endif

-

-

-/*

-** inserts a new key into a hash table; first, check whether key's main 

-** position is free. If not, check whether colliding node is in its main 

-** position or not: if it is not, move colliding node to an empty place and 

-** put new key in its main position; otherwise (colliding node is in its main 

-** position), new key goes to an empty position. 

-*/

-static TObject *newkey (lua_State *L, Table *t, const TObject *key) {

-  TObject *val;

-  Node *mp = luaH_mainposition(t, key);

-  if (!ttisnil(gval(mp))) {  /* main position is not free? */

-    Node *othern = luaH_mainposition(t, gkey(mp));  /* `mp' of colliding node */

-    Node *n = t->firstfree;  /* get a free place */

-    if (othern != mp) {  /* is colliding node out of its main position? */

-      /* yes; move colliding node into free position */

-      while (othern->next != mp) othern = othern->next;  /* find previous */

-      othern->next = n;  /* redo the chain with `n' in place of `mp' */

-      *n = *mp;  /* copy colliding node into free pos. (mp->next also goes) */

-      mp->next = NULL;  /* now `mp' is free */

-      setnilvalue(gval(mp));

-    }

-    else {  /* colliding node is in its own main position */

-      /* new node will go into free position */

-      n->next = mp->next;  /* chain new position */

-      mp->next = n;

-      mp = n;

-    }

-  }

-  setobj2t(gkey(mp), key);  /* write barrier */

-  lua_assert(ttisnil(gval(mp)));

-  for (;;) {  /* correct `firstfree' */

-    if (ttisnil(gkey(t->firstfree)))

-      return gval(mp);  /* OK; table still has a free place */

-    else if (t->firstfree == t->node) break;  /* cannot decrement from here */

-    else (t->firstfree)--;

-  }

-  /* no more free places; must create one */

-  setbvalue(gval(mp), 0);  /* avoid new key being removed */

-  rehash(L, t);  /* grow table */

-  val = cast(TObject *, luaH_get(t, key));  /* get new position */

-  lua_assert(ttisboolean(val));

-  setnilvalue(val);

-  return val;

-}

-

-

-/*

-** generic search function

-*/

-static const TObject *luaH_getany (Table *t, const TObject *key) {

-  if (ttisnil(key)) return &luaO_nilobject;

-  else {

-    Node *n = luaH_mainposition(t, key);

-    do {  /* check whether `key' is somewhere in the chain */

-      if (luaO_rawequalObj(gkey(n), key)) return gval(n);  /* that's it */

-      else n = n->next;

-    } while (n);

-    return &luaO_nilobject;

-  }

-}

-

-

-/*

-** search function for integers

-*/

-const TObject *luaH_getnum (Table *t, int key) {

-  if (1 <= key && key <= t->sizearray)

-    return &t->array[key-1];

-  else {

-    lua_Number nk = cast(lua_Number, key);

-    Node *n = hashnum(t, nk);

-    do {  /* check whether `key' is somewhere in the chain */

-      if (ttisnumber(gkey(n)) && nvalue(gkey(n)) == nk)

-        return gval(n);  /* that's it */

-      else n = n->next;

-    } while (n);

-    return &luaO_nilobject;

-  }

-}

-

-

-/*

-** search function for strings

-*/

-const TObject *luaH_getstr (Table *t, TString *key) {

-  Node *n = hashstr(t, key);

-  do {  /* check whether `key' is somewhere in the chain */

-    if (ttisstring(gkey(n)) && tsvalue(gkey(n)) == key)

-      return gval(n);  /* that's it */

-    else n = n->next;

-  } while (n);

-  return &luaO_nilobject;

-}

-

-

-/*

-** main search function

-*/

-const TObject *luaH_get (Table *t, const TObject *key) {

-  switch (ttype(key)) {

-    case LUA_TSTRING: return luaH_getstr(t, tsvalue(key));

-    case LUA_TNUMBER: {

-      int k;

-      lua_number2int(k, (nvalue(key)));

-      if (cast(lua_Number, k) == nvalue(key))  /* is an integer index? */

-        return luaH_getnum(t, k);  /* use specialized version */

-      /* else go through */

-    }

-    default: return luaH_getany(t, key);

-  }

-}

-

-

-TObject *luaH_set (lua_State *L, Table *t, const TObject *key) {

-  const TObject *p = luaH_get(t, key);

-  t->flags = 0;

-  if (p != &luaO_nilobject)

-    return cast(TObject *, p);

-  else {

-    if (ttisnil(key)) luaG_runerror(L, "table index is nil");

-    else if (ttisnumber(key) && nvalue(key) != nvalue(key))

-      luaG_runerror(L, "table index is NaN");

-    return newkey(L, t, key);

-  }

-}

-

-

-TObject *luaH_setnum (lua_State *L, Table *t, int key) {

-  const TObject *p = luaH_getnum(t, key);

-  if (p != &luaO_nilobject)

-    return cast(TObject *, p);

-  else {

-    TObject k;

-    setnvalue(&k, cast(lua_Number, key));

-    return newkey(L, t, &k);

-  }

-}

-

+/*
+** $Id: ltable.c,v 1.4 2004-11-27 21:46:07 pixel Exp $
+** Lua tables (hash)
+** See Copyright Notice in lua.h
+*/
+
+
+/*
+** Implementation of tables (aka arrays, objects, or hash tables).
+** Tables keep its elements in two parts: an array part and a hash part.
+** Non-negative integer keys are all candidates to be kept in the array
+** part. The actual size of the array is the largest `n' such that at
+** least half the slots between 0 and n are in use.
+** Hash uses a mix of chained scatter table with Brent's variation.
+** A main invariant of these tables is that, if an element is not
+** in its main position (i.e. the `original' position that its hash gives
+** to it), then the colliding element is in its own main position.
+** In other words, there are collisions only when two elements have the
+** same main position (i.e. the same hash values for that table size).
+** Because of that, the load factor of these tables can be 100% without
+** performance penalties.
+*/
+
+#include <string.h>
+
+#define ltable_c
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lgc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "ltable.h"
+
+
+/*
+** max size of array part is 2^MAXBITS
+*/
+#if BITS_INT > 26
+#define MAXBITS		24
+#else
+#define MAXBITS		(BITS_INT-2)
+#endif
+
+/* check whether `x' < 2^MAXBITS */
+#define toobig(x)	((((x)-1) >> MAXBITS) != 0)
+
+
+/* function to convert a lua_Number to int (with any rounding method) */
+#ifndef lua_number2int
+#define lua_number2int(i,n)	((i)=(int)(n))
+#endif
+
+
+#define hashpow2(t,n)      (gnode(t, lmod((n), sizenode(t))))
+  
+#define hashstr(t,str)  hashpow2(t, (str)->tsv.hash)
+#define hashboolean(t,p)        hashpow2(t, p)
+
+
+/*
+** for some types, it is better to avoid modulus by power of 2, as
+** they tend to have many 2 factors.
+*/
+#define hashmod(t,n)	(gnode(t, ((n) % ((sizenode(t)-1)|1))))
+
+
+#define hashpointer(t,p)	hashmod(t, IntPoint(p))
+
+
+/*
+** number of ints inside a lua_Number
+*/
+#define numints		cast(int, sizeof(lua_Number)/sizeof(int))
+
+
+/*
+** hash for lua_Numbers
+*/
+static Node *hashnum (const Table *t, lua_Number n) {
+  unsigned int a[numints];
+  int i;
+  n += 1;  /* normalize number (avoid -0) */
+  lua_assert(sizeof(a) <= sizeof(n));
+  memcpy(a, &n, sizeof(a));
+  for (i = 1; i < numints; i++) a[0] += a[i];
+  return hashmod(t, cast(lu_hash, a[0]));
+}
+
+
+
+/*
+** returns the `main' position of an element in a table (that is, the index
+** of its hash value)
+*/
+Node *luaH_mainposition (const Table *t, const TObject *key) {
+  switch (ttype(key)) {
+    case LUA_TNUMBER:
+      return hashnum(t, nvalue(key));
+    case LUA_TSTRING:
+      return hashstr(t, tsvalue(key));
+    case LUA_TBOOLEAN:
+      return hashboolean(t, bvalue(key));
+    case LUA_TLIGHTUSERDATA:
+      return hashpointer(t, pvalue(key));
+    default:
+      return hashpointer(t, gcvalue(key));
+  }
+}
+
+
+/*
+** returns the index for `key' if `key' is an appropriate key to live in
+** the array part of the table, -1 otherwise.
+*/
+static int arrayindex (const TObject *key) {
+  if (ttisnumber(key)) {
+    int k;
+    lua_number2int(k, (nvalue(key)));
+    if (cast(lua_Number, k) == nvalue(key) && k >= 1 && !toobig(k))
+      return k;
+  }
+  return -1;  /* `key' did not match some condition */
+}
+
+
+/*
+** returns the index of a `key' for table traversals. First goes all
+** elements in the array part, then elements in the hash part. The
+** beginning and end of a traversal are signalled by -1.
+*/
+static int luaH_index (lua_State *L, Table *t, StkId key) {
+  int i;
+  if (ttisnil(key)) return -1;  /* first iteration */
+  i = arrayindex(key);
+  if (0 <= i && i <= t->sizearray) {  /* is `key' inside array part? */
+    return i-1;  /* yes; that's the index (corrected to C) */
+  }
+  else {
+    const TObject *v = luaH_get(t, key);
+    if (v == &luaO_nilobject)
+      luaG_runerror(L, "invalid key for `next'");
+    i = cast(int, (cast(const lu_byte *, v) -
+                   cast(const lu_byte *, gval(gnode(t, 0)))) / sizeof(Node));
+    return i + t->sizearray;  /* hash elements are numbered after array ones */
+  }
+}
+
+
+int luaH_next (lua_State *L, Table *t, StkId key) {
+  int i = luaH_index(L, t, key);  /* find original element */
+  for (i++; i < t->sizearray; i++) {  /* try first array part */
+    if (!ttisnil(&t->array[i])) {  /* a non-nil value? */
+      setnvalue(key, cast(lua_Number, i+1));
+      setobj2s(key+1, &t->array[i]);
+      return 1;
+    }
+  }
+  for (i -= t->sizearray; i < sizenode(t); i++) {  /* then hash part */
+    if (!ttisnil(gval(gnode(t, i)))) {  /* a non-nil value? */
+      setobj2s(key, gkey(gnode(t, i)));
+      setobj2s(key+1, gval(gnode(t, i)));
+      return 1;
+    }
+  }
+  return 0;  /* no more elements */
+}
+
+
+/*
+** {=============================================================
+** Rehash
+** ==============================================================
+*/
+
+
+static void computesizes  (int nums[], int ntotal, int *narray, int *nhash) {
+  int i;
+  int a = nums[0];  /* number of elements smaller than 2^i */
+  int na = a;  /* number of elements to go to array part */
+  int n = (na == 0) ? -1 : 0;  /* (log of) optimal size for array part */
+  for (i = 1; a < *narray && *narray >= twoto(i-1); i++) {
+    if (nums[i] > 0) {
+      a += nums[i];
+      if (a >= twoto(i-1)) {  /* more than half elements in use? */
+        n = i;
+        na = a;
+      }
+    }
+  }
+  lua_assert(na <= *narray && *narray <= ntotal);
+  *nhash = ntotal - na;
+  *narray = (n == -1) ? 0 : twoto(n);
+  lua_assert(na <= *narray && na >= *narray/2);
+}
+
+
+static void numuse (const Table *t, int *narray, int *nhash) {
+  int nums[MAXBITS+1];
+  int i, lg;
+  int totaluse = 0;
+  /* count elements in array part */
+  for (i=0, lg=0; lg<=MAXBITS; lg++) {  /* for each slice [2^(lg-1) to 2^lg) */
+    int ttlg = twoto(lg);  /* 2^lg */
+    if (ttlg > t->sizearray) {
+      ttlg = t->sizearray;
+      if (i >= ttlg) break;
+    }
+    nums[lg] = 0;
+    for (; i<ttlg; i++) {
+      if (!ttisnil(&t->array[i])) {
+        nums[lg]++;
+        totaluse++;
+      }
+    }
+  }
+  for (; lg<=MAXBITS; lg++) nums[lg] = 0;  /* reset other counts */
+  *narray = totaluse;  /* all previous uses were in array part */
+  /* count elements in hash part */
+  i = sizenode(t);
+  while (i--) {
+    Node *n = &t->node[i];
+    if (!ttisnil(gval(n))) {
+      int k = arrayindex(gkey(n));
+      if (k >= 0) {  /* is `key' an appropriate array index? */
+        nums[luaO_log2(k-1)+1]++;  /* count as such */
+        (*narray)++;
+      }
+      totaluse++;
+    }
+  }
+  computesizes(nums, totaluse, narray, nhash);
+}
+
+
+static void setarrayvector (lua_State *L, Table *t, int size) {
+  int i;
+  luaM_reallocvector(L, t->array, t->sizearray, size, TObject);
+  for (i=t->sizearray; i<size; i++)
+     setnilvalue(&t->array[i]);
+  t->sizearray = size;
+}
+
+
+static void setnodevector (lua_State *L, Table *t, int lsize) {
+  int i;
+  int size = twoto(lsize);
+  if (lsize > MAXBITS)
+    luaG_runerror(L, "table overflow");
+  if (lsize == 0) {  /* no elements to hash part? */
+    t->node = G(L)->dummynode;  /* use common `dummynode' */
+    lua_assert(ttisnil(gkey(t->node)));  /* assert invariants: */
+    lua_assert(ttisnil(gval(t->node)));
+    lua_assert(t->node->next == NULL);  /* (`dummynode' must be empty) */
+  }
+  else {
+    t->node = luaM_newvector(L, size, Node);
+    for (i=0; i<size; i++) {
+      t->node[i].next = NULL;
+      setnilvalue(gkey(gnode(t, i)));
+      setnilvalue(gval(gnode(t, i)));
+    }
+  }
+  t->lsizenode = cast(lu_byte, lsize);
+  t->firstfree = gnode(t, size-1);  /* first free position to be used */
+}
+
+
+static void resize (lua_State *L, Table *t, int nasize, int nhsize) {
+  int i;
+  int oldasize = t->sizearray;
+  int oldhsize = t->lsizenode;
+  Node *nold;
+  Node temp[1];
+  if (oldhsize)
+    nold = t->node;  /* save old hash ... */
+  else {  /* old hash is `dummynode' */
+    lua_assert(t->node == G(L)->dummynode);
+    temp[0] = t->node[0];  /* copy it to `temp' */
+    nold = temp;
+    setnilvalue(gkey(G(L)->dummynode));  /* restate invariant */
+    setnilvalue(gval(G(L)->dummynode));
+    lua_assert(G(L)->dummynode->next == NULL);
+  }
+  if (nasize > oldasize)  /* array part must grow? */
+    setarrayvector(L, t, nasize);
+  /* create new hash part with appropriate size */
+  setnodevector(L, t, nhsize);  
+  /* re-insert elements */
+  if (nasize < oldasize) {  /* array part must shrink? */
+    t->sizearray = nasize;
+    /* re-insert elements from vanishing slice */
+    for (i=nasize; i<oldasize; i++) {
+      if (!ttisnil(&t->array[i]))
+        setobjt2t(luaH_setnum(L, t, i+1), &t->array[i]);
+    }
+    /* shrink array */
+    luaM_reallocvector(L, t->array, oldasize, nasize, TObject);
+  }
+  /* re-insert elements in hash part */
+  for (i = twoto(oldhsize) - 1; i >= 0; i--) {
+    Node *old = nold+i;
+    if (!ttisnil(gval(old)))
+      setobjt2t(luaH_set(L, t, gkey(old)), gval(old));
+  }
+  if (oldhsize)
+    luaM_freearray(L, nold, twoto(oldhsize), Node);  /* free old array */
+}
+
+
+static void rehash (lua_State *L, Table *t) {
+  int nasize, nhsize;
+  numuse(t, &nasize, &nhsize);  /* compute new sizes for array and hash parts */
+  resize(L, t, nasize, luaO_log2(nhsize)+1);
+}
+
+
+
+/*
+** }=============================================================
+*/
+
+
+Table *luaH_new (lua_State *L, int narray, int lnhash) {
+  Table *t = luaM_new(L, Table);
+  luaC_link(L, valtogco(t), LUA_TTABLE);
+  t->metatable = hvalue(defaultmeta(L));
+  t->flags = cast(lu_byte, ~0);
+  /* temporary values (kept only if some malloc fails) */
+  t->array = NULL;
+  t->sizearray = 0;
+  t->lsizenode = 0;
+  t->node = NULL;
+  setarrayvector(L, t, narray);
+  setnodevector(L, t, lnhash);
+  return t;
+}
+
+
+void luaH_free (lua_State *L, Table *t) {
+  if (t->lsizenode)
+    luaM_freearray(L, t->node, sizenode(t), Node);
+  luaM_freearray(L, t->array, t->sizearray, TObject);
+  luaM_freelem(L, t);
+}
+
+
+#if 0
+/*
+** try to remove an element from a hash table; cannot move any element
+** (because gc can call `remove' during a table traversal)
+*/
+void luaH_remove (Table *t, Node *e) {
+  Node *mp = luaH_mainposition(t, gkey(e));
+  if (e != mp) {  /* element not in its main position? */
+    while (mp->next != e) mp = mp->next;  /* find previous */
+    mp->next = e->next;  /* remove `e' from its list */
+  }
+  else {
+    if (e->next != NULL) ??
+  }
+  lua_assert(ttisnil(gval(node)));
+  setnilvalue(gkey(e));  /* clear node `e' */
+  e->next = NULL;
+}
+#endif
+
+
+/*
+** inserts a new key into a hash table; first, check whether key's main 
+** position is free. If not, check whether colliding node is in its main 
+** position or not: if it is not, move colliding node to an empty place and 
+** put new key in its main position; otherwise (colliding node is in its main 
+** position), new key goes to an empty position. 
+*/
+static TObject *newkey (lua_State *L, Table *t, const TObject *key) {
+  TObject *val;
+  Node *mp = luaH_mainposition(t, key);
+  if (!ttisnil(gval(mp))) {  /* main position is not free? */
+    Node *othern = luaH_mainposition(t, gkey(mp));  /* `mp' of colliding node */
+    Node *n = t->firstfree;  /* get a free place */
+    if (othern != mp) {  /* is colliding node out of its main position? */
+      /* yes; move colliding node into free position */
+      while (othern->next != mp) othern = othern->next;  /* find previous */
+      othern->next = n;  /* redo the chain with `n' in place of `mp' */
+      *n = *mp;  /* copy colliding node into free pos. (mp->next also goes) */
+      mp->next = NULL;  /* now `mp' is free */
+      setnilvalue(gval(mp));
+    }
+    else {  /* colliding node is in its own main position */
+      /* new node will go into free position */
+      n->next = mp->next;  /* chain new position */
+      mp->next = n;
+      mp = n;
+    }
+  }
+  setobj2t(gkey(mp), key);  /* write barrier */
+  lua_assert(ttisnil(gval(mp)));
+  for (;;) {  /* correct `firstfree' */
+    if (ttisnil(gkey(t->firstfree)))
+      return gval(mp);  /* OK; table still has a free place */
+    else if (t->firstfree == t->node) break;  /* cannot decrement from here */
+    else (t->firstfree)--;
+  }
+  /* no more free places; must create one */
+  setbvalue(gval(mp), 0);  /* avoid new key being removed */
+  rehash(L, t);  /* grow table */
+  val = cast(TObject *, luaH_get(t, key));  /* get new position */
+  lua_assert(ttisboolean(val));
+  setnilvalue(val);
+  return val;
+}
+
+
+/*
+** generic search function
+*/
+static const TObject *luaH_getany (Table *t, const TObject *key) {
+  if (ttisnil(key)) return &luaO_nilobject;
+  else {
+    Node *n = luaH_mainposition(t, key);
+    do {  /* check whether `key' is somewhere in the chain */
+      if (luaO_rawequalObj(gkey(n), key)) return gval(n);  /* that's it */
+      else n = n->next;
+    } while (n);
+    return &luaO_nilobject;
+  }
+}
+
+
+/*
+** search function for integers
+*/
+const TObject *luaH_getnum (Table *t, int key) {
+  if (1 <= key && key <= t->sizearray)
+    return &t->array[key-1];
+  else {
+    lua_Number nk = cast(lua_Number, key);
+    Node *n = hashnum(t, nk);
+    do {  /* check whether `key' is somewhere in the chain */
+      if (ttisnumber(gkey(n)) && nvalue(gkey(n)) == nk)
+        return gval(n);  /* that's it */
+      else n = n->next;
+    } while (n);
+    return &luaO_nilobject;
+  }
+}
+
+
+/*
+** search function for strings
+*/
+const TObject *luaH_getstr (Table *t, TString *key) {
+  Node *n = hashstr(t, key);
+  do {  /* check whether `key' is somewhere in the chain */
+    if (ttisstring(gkey(n)) && tsvalue(gkey(n)) == key)
+      return gval(n);  /* that's it */
+    else n = n->next;
+  } while (n);
+  return &luaO_nilobject;
+}
+
+
+/*
+** main search function
+*/
+const TObject *luaH_get (Table *t, const TObject *key) {
+  switch (ttype(key)) {
+    case LUA_TSTRING: return luaH_getstr(t, tsvalue(key));
+    case LUA_TNUMBER: {
+      int k;
+      lua_number2int(k, (nvalue(key)));
+      if (cast(lua_Number, k) == nvalue(key))  /* is an integer index? */
+        return luaH_getnum(t, k);  /* use specialized version */
+      /* else go through */
+    }
+    default: return luaH_getany(t, key);
+  }
+}
+
+
+TObject *luaH_set (lua_State *L, Table *t, const TObject *key) {
+  const TObject *p = luaH_get(t, key);
+  t->flags = 0;
+  if (p != &luaO_nilobject)
+    return cast(TObject *, p);
+  else {
+    if (ttisnil(key)) luaG_runerror(L, "table index is nil");
+    else if (ttisnumber(key) && nvalue(key) != nvalue(key))
+      luaG_runerror(L, "table index is NaN");
+    return newkey(L, t, key);
+  }
+}
+
+
+TObject *luaH_setnum (lua_State *L, Table *t, int key) {
+  const TObject *p = luaH_getnum(t, key);
+  if (p != &luaO_nilobject)
+    return cast(TObject *, p);
+  else {
+    TObject k;
+    setnvalue(&k, cast(lua_Number, key));
+    return newkey(L, t, &k);
+  }
+}
+
diff --git a/lib/lua/src/ltests.c b/lib/lua/src/ltests.c
index 8e53314..a332684 100644
--- a/lib/lua/src/ltests.c
+++ b/lib/lua/src/ltests.c
@@ -1,852 +1,852 @@
-/*

-** $Id: ltests.c,v 1.3 2004-11-27 21:35:20 pixel Exp $

-** Internal Module for Debugging of the Lua Implementation

-** See Copyright Notice in lua.h

-*/

-

-

-#include <ctype.h>

-#include <limits.h>

-#include <stdio.h>

-#include <stdlib.h>

-#include <string.h>

-

-#define ltests_c

-

-#include "lua.h"

-

-#include "lapi.h"

-#include "lauxlib.h"

-#include "lcode.h"

-#include "ldebug.h"

-#include "ldo.h"

-#include "lfunc.h"

-#include "lmem.h"

-#include "lopcodes.h"

-#include "lstate.h"

-#include "lstring.h"

-#include "ltable.h"

-#include "lualib.h"

-

-

-

-/*

-** The whole module only makes sense with LUA_DEBUG on

-*/

-#ifdef LUA_DEBUG

-

-

-#define lua_pushintegral(L,i)	lua_pushnumber(L, cast(lua_Number, (i)))

-

-

-static lua_State *lua_state = NULL;

-

-int islocked = 0;

-

-

-#define func_at(L,k)	(L->ci->base+(k) - 1)

-

-

-static void setnameval (lua_State *L, const char *name, int val) {

-  lua_pushstring(L, name);

-  lua_pushintegral(L, val);

-  lua_settable(L, -3);

-}

-

-

-/*

-** {======================================================================

-** Controlled version for realloc.

-** =======================================================================

-*/

-

-#define MARK		0x55  /* 01010101 (a nice pattern) */

-

-#ifndef EXTERNMEMCHECK

-/* full memory check */

-#define HEADER	(sizeof(L_Umaxalign)) /* ensures maximum alignment for HEADER */

-#define MARKSIZE	16  /* size of marks after each block */

-#define blockhead(b)	(cast(char *, b) - HEADER)

-#define setsize(newblock, size)	(*cast(size_t *, newblock) = size)

-#define checkblocksize(b, size) (size == (*cast(size_t *, blockhead(b))))

-#define fillmem(mem,size)	memset(mem, -MARK, size)

-#else

-/* external memory check: don't do it twice */

-#define HEADER		0

-#define MARKSIZE	0

-#define blockhead(b)	(b)

-#define setsize(newblock, size)	/* empty */

-#define checkblocksize(b,size)	(1)

-#define fillmem(mem,size)	/* empty */

-#endif

-

-unsigned long memdebug_numblocks = 0;

-unsigned long memdebug_total = 0;

-unsigned long memdebug_maxmem = 0;

-unsigned long memdebug_memlimit = ULONG_MAX;

-

-

-static void *checkblock (void *block, size_t size) {

-  void *b = blockhead(block);

-  int i;

-  for (i=0;i<MARKSIZE;i++)

-    lua_assert(*(cast(char *, b)+HEADER+size+i) == MARK+i); /* corrupted block? */

-  return b;

-}

-

-

-static void freeblock (void *block, size_t size) {

-  if (block) {

-    lua_assert(checkblocksize(block, size));

-    block = checkblock(block, size);

-    fillmem(block, size+HEADER+MARKSIZE);  /* erase block */

-    free(block);  /* free original block */

-    memdebug_numblocks--;

-    memdebug_total -= size;

-  }

-}

-

-

-void *debug_realloc (void *block, size_t oldsize, size_t size) {

-  lua_assert(oldsize == 0 || checkblocksize(block, oldsize));

-  /* ISO does not specify what realloc(NULL, 0) does */

-  lua_assert(block != NULL || size > 0);

-  if (size == 0) {

-    freeblock(block, oldsize);

-    return NULL;

-  }

-  else if (size > oldsize && memdebug_total+size-oldsize > memdebug_memlimit)

-    return NULL;  /* to test memory allocation errors */

-  else {

-    void *newblock;

-    int i;

-    size_t realsize = HEADER+size+MARKSIZE;

-    size_t commonsize = (oldsize < size) ? oldsize : size;

-    if (realsize < size) return NULL;  /* overflow! */

-    newblock = malloc(realsize);  /* alloc a new block */

-    if (newblock == NULL) return NULL;

-    if (block) {

-      memcpy(cast(char *, newblock)+HEADER, block, commonsize);

-      freeblock(block, oldsize);  /* erase (and check) old copy */

-    }

-    /* initialize new part of the block with something `weird' */

-    fillmem(cast(char *, newblock)+HEADER+commonsize, size-commonsize);

-    memdebug_total += size;

-    if (memdebug_total > memdebug_maxmem)

-      memdebug_maxmem = memdebug_total;

-    memdebug_numblocks++;

-    setsize(newblock, size);

-    for (i=0;i<MARKSIZE;i++)

-      *(cast(char *, newblock)+HEADER+size+i) = cast(char, MARK+i);

-    return cast(char *, newblock)+HEADER;

-  }

-}

-

-

-/* }====================================================================== */

-

-

-

-/*

-** {======================================================

-** Disassembler

-** =======================================================

-*/

-

-

-static char *buildop (Proto *p, int pc, char *buff) {

-  Instruction i = p->code[pc];

-  OpCode o = GET_OPCODE(i);

-  const char *name = luaP_opnames[o];

-  int line = getline(p, pc);

-  sprintf(buff, "(%4d) %4d - ", line, pc);

-  switch (getOpMode(o)) {  

-    case iABC:

-      sprintf(buff+strlen(buff), "%-12s%4d %4d %4d", name,

-              GETARG_A(i), GETARG_B(i), GETARG_C(i));

-      break;

-    case iABx:

-      sprintf(buff+strlen(buff), "%-12s%4d %4d", name, GETARG_A(i), GETARG_Bx(i));

-      break;

-    case iAsBx:

-      sprintf(buff+strlen(buff), "%-12s%4d %4d", name, GETARG_A(i), GETARG_sBx(i));

-      break;

-  }

-  return buff;

-}

-

-

-#if 0

-void luaI_printcode (Proto *pt, int size) {

-  int pc;

-  for (pc=0; pc<size; pc++) {

-    char buff[100];

-    printf("%s\n", buildop(pt, pc, buff));

-  }

-  printf("-------\n");

-}

-#endif

-

-

-static int listcode (lua_State *L) {

-  int pc;

-  Proto *p;

-  luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),

-                 1, "Lua function expected");

-  p = clvalue(func_at(L, 1))->l.p;

-  lua_newtable(L);

-  setnameval(L, "maxstack", p->maxstacksize);

-  setnameval(L, "numparams", p->numparams);

-  for (pc=0; pc<p->sizecode; pc++) {

-    char buff[100];

-    lua_pushintegral(L, pc+1);

-    lua_pushstring(L, buildop(p, pc, buff));

-    lua_settable(L, -3);

-  }

-  return 1;

-}

-

-

-static int listk (lua_State *L) {

-  Proto *p;

-  int i;

-  luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),

-                 1, "Lua function expected");

-  p = clvalue(func_at(L, 1))->l.p;

-  lua_newtable(L);

-  for (i=0; i<p->sizek; i++) {

-    lua_pushintegral(L, i+1);

-    luaA_pushobject(L, p->k+i);

-    lua_settable(L, -3);

-  }

-  return 1;

-}

-

-

-static int listlocals (lua_State *L) {

-  Proto *p;

-  int pc = luaL_checkint(L, 2) - 1;

-  int i = 0;

-  const char *name;

-  luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),

-                 1, "Lua function expected");

-  p = clvalue(func_at(L, 1))->l.p;

-  while ((name = luaF_getlocalname(p, ++i, pc)) != NULL)

-    lua_pushstring(L, name);

-  return i-1;

-}

-

-/* }====================================================== */

-

-

-

-

-static int get_limits (lua_State *L) {

-  lua_newtable(L);

-  setnameval(L, "BITS_INT", BITS_INT);

-  setnameval(L, "LFPF", LFIELDS_PER_FLUSH);

-  setnameval(L, "MAXVARS", MAXVARS);

-  setnameval(L, "MAXPARAMS", MAXPARAMS);

-  setnameval(L, "MAXSTACK", MAXSTACK);

-  setnameval(L, "MAXUPVALUES", MAXUPVALUES);

-  return 1;

-}

-

-

-static int mem_query (lua_State *L) {

-  if (lua_isnone(L, 1)) {

-    lua_pushintegral(L, memdebug_total);

-    lua_pushintegral(L, memdebug_numblocks);

-    lua_pushintegral(L, memdebug_maxmem);

-    return 3;

-  }

-  else {

-    memdebug_memlimit = luaL_checkint(L, 1);

-    return 0;

-  }

-}

-

-

-static int hash_query (lua_State *L) {

-  if (lua_isnone(L, 2)) {

-    luaL_argcheck(L, lua_type(L, 1) == LUA_TSTRING, 1, "string expected");

-    lua_pushintegral(L, tsvalue(func_at(L, 1))->tsv.hash);

-  }

-  else {

-    TObject *o = func_at(L, 1);

-    Table *t;

-    luaL_checktype(L, 2, LUA_TTABLE);

-    t = hvalue(func_at(L, 2));

-    lua_pushintegral(L, luaH_mainposition(t, o) - t->node);

-  }

-  return 1;

-}

-

-

-static int stacklevel (lua_State *L) {

-  unsigned long a = 0;

-  lua_pushintegral(L, (int)(L->top - L->stack));

-  lua_pushintegral(L, (int)(L->stack_last - L->stack));

-  lua_pushintegral(L, (int)(L->ci - L->base_ci));

-  lua_pushintegral(L, (int)(L->end_ci - L->base_ci));

-  lua_pushintegral(L, (unsigned long)&a);

-  return 5;

-}

-

-

-static int table_query (lua_State *L) {

-  const Table *t;

-  int i = luaL_optint(L, 2, -1);

-  luaL_checktype(L, 1, LUA_TTABLE);

-  t = hvalue(func_at(L, 1));

-  if (i == -1) {

-    lua_pushintegral(L, t->sizearray);

-    lua_pushintegral(L, sizenode(t));

-    lua_pushintegral(L, t->firstfree - t->node);

-  }

-  else if (i < t->sizearray) {

-    lua_pushintegral(L, i);

-    luaA_pushobject(L, &t->array[i]);

-    lua_pushnil(L); 

-  }

-  else if ((i -= t->sizearray) < sizenode(t)) {

-    if (!ttisnil(gval(gnode(t, i))) ||

-        ttisnil(gkey(gnode(t, i))) ||

-        ttisnumber(gkey(gnode(t, i)))) {

-      luaA_pushobject(L, gkey(gnode(t, i)));

-    }

-    else

-      lua_pushstring(L, "<undef>");

-    luaA_pushobject(L, gval(gnode(t, i)));

-    if (t->node[i].next)

-      lua_pushintegral(L, t->node[i].next - t->node);

-    else

-      lua_pushnil(L);

-  }

-  return 3;

-}

-

-

-static int string_query (lua_State *L) {

-  stringtable *tb = &G(L)->strt;

-  int s = luaL_optint(L, 2, 0) - 1;

-  if (s==-1) {

-    lua_pushintegral(L ,tb->nuse);

-    lua_pushintegral(L ,tb->size);

-    return 2;

-  }

-  else if (s < tb->size) {

-    GCObject *ts;

-    int n = 0;

-    for (ts = tb->hash[s]; ts; ts = ts->gch.next) {

-      setsvalue2s(L->top, gcotots(ts));

-      incr_top(L);

-      n++;

-    }

-    return n;

-  }

-  return 0;

-}

-

-

-static int tref (lua_State *L) {

-  int level = lua_gettop(L);

-  int lock = luaL_optint(L, 2, 1);

-  luaL_checkany(L, 1);

-  lua_pushvalue(L, 1);

-  lua_pushintegral(L, lua_ref(L, lock));

-  assert(lua_gettop(L) == level+1);  /* +1 for result */

-  return 1;

-}

-

-static int getref (lua_State *L) {

-  int level = lua_gettop(L);

-  lua_getref(L, luaL_checkint(L, 1));

-  assert(lua_gettop(L) == level+1);

-  return 1;

-}

-

-static int unref (lua_State *L) {

-  int level = lua_gettop(L);

-  lua_unref(L, luaL_checkint(L, 1));

-  assert(lua_gettop(L) == level);

-  return 0;

-}

-

-static int metatable (lua_State *L) {

-  luaL_checkany(L, 1);

-  if (lua_isnone(L, 2)) {

-    if (lua_getmetatable(L, 1) == 0)

-      lua_pushnil(L);

-  }

-  else {

-    lua_settop(L, 2);

-    luaL_checktype(L, 2, LUA_TTABLE);

-    lua_setmetatable(L, 1);

-  }

-  return 1;

-}

-

-

-static int upvalue (lua_State *L) {

-  int n = luaL_checkint(L, 2);

-  luaL_checktype(L, 1, LUA_TFUNCTION);

-  if (lua_isnone(L, 3)) {

-    const char *name = lua_getupvalue(L, 1, n);

-    if (name == NULL) return 0;

-    lua_pushstring(L, name);

-    return 2;

-  }

-  else {

-    const char *name = lua_setupvalue(L, 1, n);

-    lua_pushstring(L, name);

-    return 1;

-  }

-}

-

-

-static int newuserdata (lua_State *L) {

-  size_t size = luaL_checkint(L, 1);

-  char *p = cast(char *, lua_newuserdata(L, size));

-  while (size--) *p++ = '\0';

-  return 1;

-}

-

-

-static int pushuserdata (lua_State *L) {

-  lua_pushlightuserdata(L, cast(void *, luaL_checkint(L, 1)));

-  return 1;

-}

-

-

-static int udataval (lua_State *L) {

-  lua_pushintegral(L, cast(int, lua_touserdata(L, 1)));

-  return 1;

-}

-

-

-static int doonnewstack (lua_State *L) {

-  lua_State *L1 = lua_newthread(L);

-  size_t l;

-  const char *s = luaL_checklstring(L, 1, &l);

-  int status = luaL_loadbuffer(L1, s, l, s);

-  if (status == 0)

-    status = lua_pcall(L1, 0, 0, 0);

-  lua_pushintegral(L, status);

-  return 1;

-}

-

-

-static int s2d (lua_State *L) {

-  lua_pushnumber(L, *cast(const double *, luaL_checkstring(L, 1)));

-  return 1;

-}

-

-static int d2s (lua_State *L) {

-  double d = luaL_checknumber(L, 1);

-  lua_pushlstring(L, cast(char *, &d), sizeof(d));

-  return 1;

-}

-

-

-static int newstate (lua_State *L) {

-  lua_State *L1 = lua_open();

-  if (L1) {

-    lua_userstateopen(L1);  /* init lock */

-    lua_pushintegral(L, (unsigned long)L1);

-  }

-  else

-    lua_pushnil(L);

-  return 1;

-}

-

-

-static int loadlib (lua_State *L) {

-  static const luaL_reg libs[] = {

-    {"mathlibopen", luaopen_math},

-    {"strlibopen", luaopen_string},

-    {"iolibopen", luaopen_io},

-    {"tablibopen", luaopen_table},

-    {"dblibopen", luaopen_debug},

-    {"baselibopen", luaopen_base},

-    {NULL, NULL}

-  };

-  lua_State *L1 = cast(lua_State *,

-                       cast(unsigned long, luaL_checknumber(L, 1)));

-  lua_pushvalue(L1, LUA_GLOBALSINDEX);

-  luaL_openlib(L1, NULL, libs, 0);

-  return 0;

-}

-

-static int closestate (lua_State *L) {

-  lua_State *L1 = cast(lua_State *, cast(unsigned long, luaL_checknumber(L, 1)));

-  lua_close(L1);

-  lua_unlock(L);  /* close cannot unlock that */

-  return 0;

-}

-

-static int doremote (lua_State *L) {

-  lua_State *L1 = cast(lua_State *,cast(unsigned long,luaL_checknumber(L, 1)));

-  size_t lcode;

-  const char *code = luaL_checklstring(L, 2, &lcode);

-  int status;

-  lua_settop(L1, 0);

-  status = luaL_loadbuffer(L1, code, lcode, code);

-  if (status == 0)

-    status = lua_pcall(L1, 0, LUA_MULTRET, 0);

-  if (status != 0) {

-    lua_pushnil(L);

-    lua_pushintegral(L, status);

-    lua_pushstring(L, lua_tostring(L1, -1));

-    return 3;

-  }

-  else {

-    int i = 0;

-    while (!lua_isnone(L1, ++i))

-      lua_pushstring(L, lua_tostring(L1, i));

-    lua_pop(L1, i-1);

-    return i-1;

-  }

-}

-

-

-static int log2_aux (lua_State *L) {

-  lua_pushintegral(L, luaO_log2(luaL_checkint(L, 1)));

-  return 1;

-}

-

-static int int2fb_aux (lua_State *L) {

-  int b = luaO_int2fb(luaL_checkint(L, 1));

-  lua_pushintegral(L, b);

-  lua_pushintegral(L, fb2int(b));

-  return 2;

-}

-

-

-static int test_do (lua_State *L) {

-  const char *p = luaL_checkstring(L, 1);

-  if (*p == '@')

-    lua_dofile(L, p+1);

-  else

-    lua_dostring(L, p);

-  return lua_gettop(L);

-}

-

-

-

-/*

-** {======================================================

-** function to test the API with C. It interprets a kind of assembler

-** language with calls to the API, so the test can be driven by Lua code

-** =======================================================

-*/

-

-static const char *const delimits = " \t\n,;";

-

-static void skip (const char **pc) {

-  while (**pc != '\0' && strchr(delimits, **pc)) (*pc)++;

-}

-

-static int getnum_aux (lua_State *L, const char **pc) {

-  int res = 0;

-  int sig = 1;

-  skip(pc);

-  if (**pc == '.') {

-    res = cast(int, lua_tonumber(L, -1));

-    lua_pop(L, 1);

-    (*pc)++;

-    return res;

-  }

-  else if (**pc == '-') {

-    sig = -1;

-    (*pc)++;

-  }

-  while (isdigit(cast(int, **pc))) res = res*10 + (*(*pc)++) - '0';

-  return sig*res;

-}

-  

-static const char *getname_aux (char *buff, const char **pc) {

-  int i = 0;

-  skip(pc);

-  while (**pc != '\0' && !strchr(delimits, **pc))

-    buff[i++] = *(*pc)++;

-  buff[i] = '\0';

-  return buff;

-}

-

-

-#define EQ(s1)	(strcmp(s1, inst) == 0)

-

-#define getnum	(getnum_aux(L, &pc))

-#define getname	(getname_aux(buff, &pc))

-

-

-static int testC (lua_State *L) {

-  char buff[30];

-  const char *pc = luaL_checkstring(L, 1);

-  for (;;) {

-    const char *inst = getname;

-    if EQ("") return 0;

-    else if EQ("isnumber") {

-      lua_pushintegral(L, lua_isnumber(L, getnum));

-    }

-    else if EQ("isstring") {

-      lua_pushintegral(L, lua_isstring(L, getnum));

-    }

-    else if EQ("istable") {

-      lua_pushintegral(L, lua_istable(L, getnum));

-    }

-    else if EQ("iscfunction") {

-      lua_pushintegral(L, lua_iscfunction(L, getnum));

-    }

-    else if EQ("isfunction") {

-      lua_pushintegral(L, lua_isfunction(L, getnum));

-    }

-    else if EQ("isuserdata") {

-      lua_pushintegral(L, lua_isuserdata(L, getnum));

-    }

-    else if EQ("isudataval") {

-      lua_pushintegral(L, lua_islightuserdata(L, getnum));

-    }

-    else if EQ("isnil") {

-      lua_pushintegral(L, lua_isnil(L, getnum));

-    }

-    else if EQ("isnull") {

-      lua_pushintegral(L, lua_isnone(L, getnum));

-    }

-    else if EQ("tonumber") {

-      lua_pushnumber(L, lua_tonumber(L, getnum));

-    }

-    else if EQ("tostring") {

-      const char *s = lua_tostring(L, getnum);

-      lua_pushstring(L, s);

-    }

-    else if EQ("strlen") {

-      lua_pushintegral(L, lua_strlen(L, getnum));

-    }

-    else if EQ("tocfunction") {

-      lua_pushcfunction(L, lua_tocfunction(L, getnum));

-    }

-    else if EQ("return") {

-      return getnum;

-    }

-    else if EQ("gettop") {

-      lua_pushintegral(L, lua_gettop(L));

-    }

-    else if EQ("settop") {

-      lua_settop(L, getnum);

-    }

-    else if EQ("pop") {

-      lua_pop(L, getnum);

-    }

-    else if EQ("pushnum") {

-      lua_pushintegral(L, getnum);

-    }

-    else if EQ("pushnil") {

-      lua_pushnil(L);

-    }

-    else if EQ("pushbool") {

-      lua_pushboolean(L, getnum);

-    }

-    else if EQ("tobool") {

-      lua_pushintegral(L, lua_toboolean(L, getnum));

-    }

-    else if EQ("pushvalue") {

-      lua_pushvalue(L, getnum);

-    }

-    else if EQ("pushcclosure") {

-      lua_pushcclosure(L, testC, getnum);

-    }

-    else if EQ("pushupvalues") {

-      lua_pushupvalues(L);

-    }

-    else if EQ("remove") {

-      lua_remove(L, getnum);

-    }

-    else if EQ("insert") {

-      lua_insert(L, getnum);

-    }

-    else if EQ("replace") {

-      lua_replace(L, getnum);

-    }

-    else if EQ("gettable") {

-      lua_gettable(L, getnum);

-    }

-    else if EQ("settable") {

-      lua_settable(L, getnum);

-    }

-    else if EQ("next") {

-      lua_next(L, -2);

-    }

-    else if EQ("concat") {

-      lua_concat(L, getnum);

-    }

-    else if EQ("lessthan") {

-      int a = getnum;

-      lua_pushboolean(L, lua_lessthan(L, a, getnum));

-    }

-    else if EQ("equal") {

-      int a = getnum;

-      lua_pushboolean(L, lua_equal(L, a, getnum));

-    }

-    else if EQ("rawcall") {

-      int narg = getnum;

-      int nres = getnum;

-      lua_call(L, narg, nres);

-    }

-    else if EQ("call") {

-      int narg = getnum;

-      int nres = getnum;

-      lua_pcall(L, narg, nres, 0);

-    }

-    else if EQ("loadstring") {

-      size_t sl;

-      const char *s = luaL_checklstring(L, getnum, &sl);

-      luaL_loadbuffer(L, s, sl, s);

-    }

-    else if EQ("loadfile") {

-      luaL_loadfile(L, luaL_checkstring(L, getnum));

-    }

-    else if EQ("setmetatable") {

-      lua_setmetatable(L, getnum);

-    }

-    else if EQ("getmetatable") {

-      if (lua_getmetatable(L, getnum) == 0)

-        lua_pushnil(L);

-    }

-    else if EQ("type") {

-      lua_pushstring(L, lua_typename(L, lua_type(L, getnum)));

-    }

-    else if EQ("getn") {

-      int i = getnum;

-      lua_pushintegral(L, luaL_getn(L, i));

-    }

-    else if EQ("setn") {

-      int i = getnum;

-      int n = cast(int, lua_tonumber(L, -1));

-      luaL_setn(L, i, n);

-      lua_pop(L, 1);

-    }

-    else luaL_error(L, "unknown instruction %s", buff);

-  }

-  return 0;

-}

-

-/* }====================================================== */

-

-

-/*

-** {======================================================

-** tests for yield inside hooks

-** =======================================================

-*/

-

-static void yieldf (lua_State *L, lua_Debug *ar) {

-  lua_yield(L, 0);

-}

-

-static int setyhook (lua_State *L) {

-  if (lua_isnoneornil(L, 1))

-    lua_sethook(L, NULL, 0, 0);  /* turn off hooks */

-  else {

-    const char *smask = luaL_checkstring(L, 1);

-    int count = luaL_optint(L, 2, 0);

-    int mask = 0;

-    if (strchr(smask, 'l')) mask |= LUA_MASKLINE;

-    if (count > 0) mask |= LUA_MASKCOUNT;

-    lua_sethook(L, yieldf, mask, count);

-  }

-  return 0;

-}

-

-

-static int coresume (lua_State *L) {

-  int status;

-  lua_State *co = lua_tothread(L, 1);

-  luaL_argcheck(L, co, 1, "coroutine expected");

-  status = lua_resume(co, 0);

-  if (status != 0) {

-    lua_pushboolean(L, 0);

-    lua_insert(L, -2);

-    return 2;  /* return false + error message */

-  }

-  else {

-    lua_pushboolean(L, 1);

-    return 1;

-  }

-}

-

-/* }====================================================== */

-

-

-

-static const struct luaL_reg tests_funcs[] = {

-  {"hash", hash_query},

-  {"limits", get_limits},

-  {"listcode", listcode},

-  {"listk", listk},

-  {"listlocals", listlocals},

-  {"loadlib", loadlib},

-  {"stacklevel", stacklevel},

-  {"querystr", string_query},

-  {"querytab", table_query},

-  {"doit", test_do},

-  {"testC", testC},

-  {"ref", tref},

-  {"getref", getref},

-  {"unref", unref},

-  {"d2s", d2s},

-  {"s2d", s2d},

-  {"metatable", metatable},

-  {"upvalue", upvalue},

-  {"newuserdata", newuserdata},

-  {"pushuserdata", pushuserdata},

-  {"udataval", udataval},

-  {"doonnewstack", doonnewstack},

-  {"newstate", newstate},

-  {"closestate", closestate},

-  {"doremote", doremote},

-  {"log2", log2_aux},

-  {"int2fb", int2fb_aux},

-  {"totalmem", mem_query},

-  {"resume", coresume},

-  {"setyhook", setyhook},

-  {NULL, NULL}

-};

-

-

-static void fim (void) {

-  if (!islocked)

-    lua_close(lua_state);

-  lua_assert(memdebug_numblocks == 0);

-  lua_assert(memdebug_total == 0);

-}

-

-

-static int l_panic (lua_State *L) {

-  UNUSED(L);

-  fprintf(stderr, "unable to recover; exiting\n");

-  return 0;

-}

-

-

-int luaB_opentests (lua_State *L) {

-  lua_atpanic(L, l_panic);

-  lua_userstateopen(L);  /* init lock */

-  lua_state = L;  /* keep first state to be opened */

-  luaL_openlib(L, "T", tests_funcs, 0);

-  atexit(fim);

-  return 0;

-}

-

-

-#undef main

-int main (int argc, char *argv[]) {

-  char *limit = getenv("MEMLIMIT");

-  if (limit)

-    memdebug_memlimit = strtoul(limit, NULL, 10);

-  l_main(argc, argv);

-  return 0;

-}

-

-#endif

+/*
+** $Id: ltests.c,v 1.4 2004-11-27 21:46:07 pixel Exp $
+** Internal Module for Debugging of the Lua Implementation
+** See Copyright Notice in lua.h
+*/
+
+
+#include <ctype.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define ltests_c
+
+#include "lua.h"
+
+#include "lapi.h"
+#include "lauxlib.h"
+#include "lcode.h"
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lmem.h"
+#include "lopcodes.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "lualib.h"
+
+
+
+/*
+** The whole module only makes sense with LUA_DEBUG on
+*/
+#ifdef LUA_DEBUG
+
+
+#define lua_pushintegral(L,i)	lua_pushnumber(L, cast(lua_Number, (i)))
+
+
+static lua_State *lua_state = NULL;
+
+int islocked = 0;
+
+
+#define func_at(L,k)	(L->ci->base+(k) - 1)
+
+
+static void setnameval (lua_State *L, const char *name, int val) {
+  lua_pushstring(L, name);
+  lua_pushintegral(L, val);
+  lua_settable(L, -3);
+}
+
+
+/*
+** {======================================================================
+** Controlled version for realloc.
+** =======================================================================
+*/
+
+#define MARK		0x55  /* 01010101 (a nice pattern) */
+
+#ifndef EXTERNMEMCHECK
+/* full memory check */
+#define HEADER	(sizeof(L_Umaxalign)) /* ensures maximum alignment for HEADER */
+#define MARKSIZE	16  /* size of marks after each block */
+#define blockhead(b)	(cast(char *, b) - HEADER)
+#define setsize(newblock, size)	(*cast(size_t *, newblock) = size)
+#define checkblocksize(b, size) (size == (*cast(size_t *, blockhead(b))))
+#define fillmem(mem,size)	memset(mem, -MARK, size)
+#else
+/* external memory check: don't do it twice */
+#define HEADER		0
+#define MARKSIZE	0
+#define blockhead(b)	(b)
+#define setsize(newblock, size)	/* empty */
+#define checkblocksize(b,size)	(1)
+#define fillmem(mem,size)	/* empty */
+#endif
+
+unsigned long memdebug_numblocks = 0;
+unsigned long memdebug_total = 0;
+unsigned long memdebug_maxmem = 0;
+unsigned long memdebug_memlimit = ULONG_MAX;
+
+
+static void *checkblock (void *block, size_t size) {
+  void *b = blockhead(block);
+  int i;
+  for (i=0;i<MARKSIZE;i++)
+    lua_assert(*(cast(char *, b)+HEADER+size+i) == MARK+i); /* corrupted block? */
+  return b;
+}
+
+
+static void freeblock (void *block, size_t size) {
+  if (block) {
+    lua_assert(checkblocksize(block, size));
+    block = checkblock(block, size);
+    fillmem(block, size+HEADER+MARKSIZE);  /* erase block */
+    free(block);  /* free original block */
+    memdebug_numblocks--;
+    memdebug_total -= size;
+  }
+}
+
+
+void *debug_realloc (void *block, size_t oldsize, size_t size) {
+  lua_assert(oldsize == 0 || checkblocksize(block, oldsize));
+  /* ISO does not specify what realloc(NULL, 0) does */
+  lua_assert(block != NULL || size > 0);
+  if (size == 0) {
+    freeblock(block, oldsize);
+    return NULL;
+  }
+  else if (size > oldsize && memdebug_total+size-oldsize > memdebug_memlimit)
+    return NULL;  /* to test memory allocation errors */
+  else {
+    void *newblock;
+    int i;
+    size_t realsize = HEADER+size+MARKSIZE;
+    size_t commonsize = (oldsize < size) ? oldsize : size;
+    if (realsize < size) return NULL;  /* overflow! */
+    newblock = malloc(realsize);  /* alloc a new block */
+    if (newblock == NULL) return NULL;
+    if (block) {
+      memcpy(cast(char *, newblock)+HEADER, block, commonsize);
+      freeblock(block, oldsize);  /* erase (and check) old copy */
+    }
+    /* initialize new part of the block with something `weird' */
+    fillmem(cast(char *, newblock)+HEADER+commonsize, size-commonsize);
+    memdebug_total += size;
+    if (memdebug_total > memdebug_maxmem)
+      memdebug_maxmem = memdebug_total;
+    memdebug_numblocks++;
+    setsize(newblock, size);
+    for (i=0;i<MARKSIZE;i++)
+      *(cast(char *, newblock)+HEADER+size+i) = cast(char, MARK+i);
+    return cast(char *, newblock)+HEADER;
+  }
+}
+
+
+/* }====================================================================== */
+
+
+
+/*
+** {======================================================
+** Disassembler
+** =======================================================
+*/
+
+
+static char *buildop (Proto *p, int pc, char *buff) {
+  Instruction i = p->code[pc];
+  OpCode o = GET_OPCODE(i);
+  const char *name = luaP_opnames[o];
+  int line = getline(p, pc);
+  sprintf(buff, "(%4d) %4d - ", line, pc);
+  switch (getOpMode(o)) {  
+    case iABC:
+      sprintf(buff+strlen(buff), "%-12s%4d %4d %4d", name,
+              GETARG_A(i), GETARG_B(i), GETARG_C(i));
+      break;
+    case iABx:
+      sprintf(buff+strlen(buff), "%-12s%4d %4d", name, GETARG_A(i), GETARG_Bx(i));
+      break;
+    case iAsBx:
+      sprintf(buff+strlen(buff), "%-12s%4d %4d", name, GETARG_A(i), GETARG_sBx(i));
+      break;
+  }
+  return buff;
+}
+
+
+#if 0
+void luaI_printcode (Proto *pt, int size) {
+  int pc;
+  for (pc=0; pc<size; pc++) {
+    char buff[100];
+    printf("%s\n", buildop(pt, pc, buff));
+  }
+  printf("-------\n");
+}
+#endif
+
+
+static int listcode (lua_State *L) {
+  int pc;
+  Proto *p;
+  luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
+                 1, "Lua function expected");
+  p = clvalue(func_at(L, 1))->l.p;
+  lua_newtable(L);
+  setnameval(L, "maxstack", p->maxstacksize);
+  setnameval(L, "numparams", p->numparams);
+  for (pc=0; pc<p->sizecode; pc++) {
+    char buff[100];
+    lua_pushintegral(L, pc+1);
+    lua_pushstring(L, buildop(p, pc, buff));
+    lua_settable(L, -3);
+  }
+  return 1;
+}
+
+
+static int listk (lua_State *L) {
+  Proto *p;
+  int i;
+  luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
+                 1, "Lua function expected");
+  p = clvalue(func_at(L, 1))->l.p;
+  lua_newtable(L);
+  for (i=0; i<p->sizek; i++) {
+    lua_pushintegral(L, i+1);
+    luaA_pushobject(L, p->k+i);
+    lua_settable(L, -3);
+  }
+  return 1;
+}
+
+
+static int listlocals (lua_State *L) {
+  Proto *p;
+  int pc = luaL_checkint(L, 2) - 1;
+  int i = 0;
+  const char *name;
+  luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
+                 1, "Lua function expected");
+  p = clvalue(func_at(L, 1))->l.p;
+  while ((name = luaF_getlocalname(p, ++i, pc)) != NULL)
+    lua_pushstring(L, name);
+  return i-1;
+}
+
+/* }====================================================== */
+
+
+
+
+static int get_limits (lua_State *L) {
+  lua_newtable(L);
+  setnameval(L, "BITS_INT", BITS_INT);
+  setnameval(L, "LFPF", LFIELDS_PER_FLUSH);
+  setnameval(L, "MAXVARS", MAXVARS);
+  setnameval(L, "MAXPARAMS", MAXPARAMS);
+  setnameval(L, "MAXSTACK", MAXSTACK);
+  setnameval(L, "MAXUPVALUES", MAXUPVALUES);
+  return 1;
+}
+
+
+static int mem_query (lua_State *L) {
+  if (lua_isnone(L, 1)) {
+    lua_pushintegral(L, memdebug_total);
+    lua_pushintegral(L, memdebug_numblocks);
+    lua_pushintegral(L, memdebug_maxmem);
+    return 3;
+  }
+  else {
+    memdebug_memlimit = luaL_checkint(L, 1);
+    return 0;
+  }
+}
+
+
+static int hash_query (lua_State *L) {
+  if (lua_isnone(L, 2)) {
+    luaL_argcheck(L, lua_type(L, 1) == LUA_TSTRING, 1, "string expected");
+    lua_pushintegral(L, tsvalue(func_at(L, 1))->tsv.hash);
+  }
+  else {
+    TObject *o = func_at(L, 1);
+    Table *t;
+    luaL_checktype(L, 2, LUA_TTABLE);
+    t = hvalue(func_at(L, 2));
+    lua_pushintegral(L, luaH_mainposition(t, o) - t->node);
+  }
+  return 1;
+}
+
+
+static int stacklevel (lua_State *L) {
+  unsigned long a = 0;
+  lua_pushintegral(L, (int)(L->top - L->stack));
+  lua_pushintegral(L, (int)(L->stack_last - L->stack));
+  lua_pushintegral(L, (int)(L->ci - L->base_ci));
+  lua_pushintegral(L, (int)(L->end_ci - L->base_ci));
+  lua_pushintegral(L, (unsigned long)&a);
+  return 5;
+}
+
+
+static int table_query (lua_State *L) {
+  const Table *t;
+  int i = luaL_optint(L, 2, -1);
+  luaL_checktype(L, 1, LUA_TTABLE);
+  t = hvalue(func_at(L, 1));
+  if (i == -1) {
+    lua_pushintegral(L, t->sizearray);
+    lua_pushintegral(L, sizenode(t));
+    lua_pushintegral(L, t->firstfree - t->node);
+  }
+  else if (i < t->sizearray) {
+    lua_pushintegral(L, i);
+    luaA_pushobject(L, &t->array[i]);
+    lua_pushnil(L); 
+  }
+  else if ((i -= t->sizearray) < sizenode(t)) {
+    if (!ttisnil(gval(gnode(t, i))) ||
+        ttisnil(gkey(gnode(t, i))) ||
+        ttisnumber(gkey(gnode(t, i)))) {
+      luaA_pushobject(L, gkey(gnode(t, i)));
+    }
+    else
+      lua_pushstring(L, "<undef>");
+    luaA_pushobject(L, gval(gnode(t, i)));
+    if (t->node[i].next)
+      lua_pushintegral(L, t->node[i].next - t->node);
+    else
+      lua_pushnil(L);
+  }
+  return 3;
+}
+
+
+static int string_query (lua_State *L) {
+  stringtable *tb = &G(L)->strt;
+  int s = luaL_optint(L, 2, 0) - 1;
+  if (s==-1) {
+    lua_pushintegral(L ,tb->nuse);
+    lua_pushintegral(L ,tb->size);
+    return 2;
+  }
+  else if (s < tb->size) {
+    GCObject *ts;
+    int n = 0;
+    for (ts = tb->hash[s]; ts; ts = ts->gch.next) {
+      setsvalue2s(L->top, gcotots(ts));
+      incr_top(L);
+      n++;
+    }
+    return n;
+  }
+  return 0;
+}
+
+
+static int tref (lua_State *L) {
+  int level = lua_gettop(L);
+  int lock = luaL_optint(L, 2, 1);
+  luaL_checkany(L, 1);
+  lua_pushvalue(L, 1);
+  lua_pushintegral(L, lua_ref(L, lock));
+  assert(lua_gettop(L) == level+1);  /* +1 for result */
+  return 1;
+}
+
+static int getref (lua_State *L) {
+  int level = lua_gettop(L);
+  lua_getref(L, luaL_checkint(L, 1));
+  assert(lua_gettop(L) == level+1);
+  return 1;
+}
+
+static int unref (lua_State *L) {
+  int level = lua_gettop(L);
+  lua_unref(L, luaL_checkint(L, 1));
+  assert(lua_gettop(L) == level);
+  return 0;
+}
+
+static int metatable (lua_State *L) {
+  luaL_checkany(L, 1);
+  if (lua_isnone(L, 2)) {
+    if (lua_getmetatable(L, 1) == 0)
+      lua_pushnil(L);
+  }
+  else {
+    lua_settop(L, 2);
+    luaL_checktype(L, 2, LUA_TTABLE);
+    lua_setmetatable(L, 1);
+  }
+  return 1;
+}
+
+
+static int upvalue (lua_State *L) {
+  int n = luaL_checkint(L, 2);
+  luaL_checktype(L, 1, LUA_TFUNCTION);
+  if (lua_isnone(L, 3)) {
+    const char *name = lua_getupvalue(L, 1, n);
+    if (name == NULL) return 0;
+    lua_pushstring(L, name);
+    return 2;
+  }
+  else {
+    const char *name = lua_setupvalue(L, 1, n);
+    lua_pushstring(L, name);
+    return 1;
+  }
+}
+
+
+static int newuserdata (lua_State *L) {
+  size_t size = luaL_checkint(L, 1);
+  char *p = cast(char *, lua_newuserdata(L, size));
+  while (size--) *p++ = '\0';
+  return 1;
+}
+
+
+static int pushuserdata (lua_State *L) {
+  lua_pushlightuserdata(L, cast(void *, luaL_checkint(L, 1)));
+  return 1;
+}
+
+
+static int udataval (lua_State *L) {
+  lua_pushintegral(L, cast(int, lua_touserdata(L, 1)));
+  return 1;
+}
+
+
+static int doonnewstack (lua_State *L) {
+  lua_State *L1 = lua_newthread(L);
+  size_t l;
+  const char *s = luaL_checklstring(L, 1, &l);
+  int status = luaL_loadbuffer(L1, s, l, s);
+  if (status == 0)
+    status = lua_pcall(L1, 0, 0, 0);
+  lua_pushintegral(L, status);
+  return 1;
+}
+
+
+static int s2d (lua_State *L) {
+  lua_pushnumber(L, *cast(const double *, luaL_checkstring(L, 1)));
+  return 1;
+}
+
+static int d2s (lua_State *L) {
+  double d = luaL_checknumber(L, 1);
+  lua_pushlstring(L, cast(char *, &d), sizeof(d));
+  return 1;
+}
+
+
+static int newstate (lua_State *L) {
+  lua_State *L1 = lua_open();
+  if (L1) {
+    lua_userstateopen(L1);  /* init lock */
+    lua_pushintegral(L, (unsigned long)L1);
+  }
+  else
+    lua_pushnil(L);
+  return 1;
+}
+
+
+static int loadlib (lua_State *L) {
+  static const luaL_reg libs[] = {
+    {"mathlibopen", luaopen_math},
+    {"strlibopen", luaopen_string},
+    {"iolibopen", luaopen_io},
+    {"tablibopen", luaopen_table},
+    {"dblibopen", luaopen_debug},
+    {"baselibopen", luaopen_base},
+    {NULL, NULL}
+  };
+  lua_State *L1 = cast(lua_State *,
+                       cast(unsigned long, luaL_checknumber(L, 1)));
+  lua_pushvalue(L1, LUA_GLOBALSINDEX);
+  luaL_openlib(L1, NULL, libs, 0);
+  return 0;
+}
+
+static int closestate (lua_State *L) {
+  lua_State *L1 = cast(lua_State *, cast(unsigned long, luaL_checknumber(L, 1)));
+  lua_close(L1);
+  lua_unlock(L);  /* close cannot unlock that */
+  return 0;
+}
+
+static int doremote (lua_State *L) {
+  lua_State *L1 = cast(lua_State *,cast(unsigned long,luaL_checknumber(L, 1)));
+  size_t lcode;
+  const char *code = luaL_checklstring(L, 2, &lcode);
+  int status;
+  lua_settop(L1, 0);
+  status = luaL_loadbuffer(L1, code, lcode, code);
+  if (status == 0)
+    status = lua_pcall(L1, 0, LUA_MULTRET, 0);
+  if (status != 0) {
+    lua_pushnil(L);
+    lua_pushintegral(L, status);
+    lua_pushstring(L, lua_tostring(L1, -1));
+    return 3;
+  }
+  else {
+    int i = 0;
+    while (!lua_isnone(L1, ++i))
+      lua_pushstring(L, lua_tostring(L1, i));
+    lua_pop(L1, i-1);
+    return i-1;
+  }
+}
+
+
+static int log2_aux (lua_State *L) {
+  lua_pushintegral(L, luaO_log2(luaL_checkint(L, 1)));
+  return 1;
+}
+
+static int int2fb_aux (lua_State *L) {
+  int b = luaO_int2fb(luaL_checkint(L, 1));
+  lua_pushintegral(L, b);
+  lua_pushintegral(L, fb2int(b));
+  return 2;
+}
+
+
+static int test_do (lua_State *L) {
+  const char *p = luaL_checkstring(L, 1);
+  if (*p == '@')
+    lua_dofile(L, p+1);
+  else
+    lua_dostring(L, p);
+  return lua_gettop(L);
+}
+
+
+
+/*
+** {======================================================
+** function to test the API with C. It interprets a kind of assembler
+** language with calls to the API, so the test can be driven by Lua code
+** =======================================================
+*/
+
+static const char *const delimits = " \t\n,;";
+
+static void skip (const char **pc) {
+  while (**pc != '\0' && strchr(delimits, **pc)) (*pc)++;
+}
+
+static int getnum_aux (lua_State *L, const char **pc) {
+  int res = 0;
+  int sig = 1;
+  skip(pc);
+  if (**pc == '.') {
+    res = cast(int, lua_tonumber(L, -1));
+    lua_pop(L, 1);
+    (*pc)++;
+    return res;
+  }
+  else if (**pc == '-') {
+    sig = -1;
+    (*pc)++;
+  }
+  while (isdigit(cast(int, **pc))) res = res*10 + (*(*pc)++) - '0';
+  return sig*res;
+}
+  
+static const char *getname_aux (char *buff, const char **pc) {
+  int i = 0;
+  skip(pc);
+  while (**pc != '\0' && !strchr(delimits, **pc))
+    buff[i++] = *(*pc)++;
+  buff[i] = '\0';
+  return buff;
+}
+
+
+#define EQ(s1)	(strcmp(s1, inst) == 0)
+
+#define getnum	(getnum_aux(L, &pc))
+#define getname	(getname_aux(buff, &pc))
+
+
+static int testC (lua_State *L) {
+  char buff[30];
+  const char *pc = luaL_checkstring(L, 1);
+  for (;;) {
+    const char *inst = getname;
+    if EQ("") return 0;
+    else if EQ("isnumber") {
+      lua_pushintegral(L, lua_isnumber(L, getnum));
+    }
+    else if EQ("isstring") {
+      lua_pushintegral(L, lua_isstring(L, getnum));
+    }
+    else if EQ("istable") {
+      lua_pushintegral(L, lua_istable(L, getnum));
+    }
+    else if EQ("iscfunction") {
+      lua_pushintegral(L, lua_iscfunction(L, getnum));
+    }
+    else if EQ("isfunction") {
+      lua_pushintegral(L, lua_isfunction(L, getnum));
+    }
+    else if EQ("isuserdata") {
+      lua_pushintegral(L, lua_isuserdata(L, getnum));
+    }
+    else if EQ("isudataval") {
+      lua_pushintegral(L, lua_islightuserdata(L, getnum));
+    }
+    else if EQ("isnil") {
+      lua_pushintegral(L, lua_isnil(L, getnum));
+    }
+    else if EQ("isnull") {
+      lua_pushintegral(L, lua_isnone(L, getnum));
+    }
+    else if EQ("tonumber") {
+      lua_pushnumber(L, lua_tonumber(L, getnum));
+    }
+    else if EQ("tostring") {
+      const char *s = lua_tostring(L, getnum);
+      lua_pushstring(L, s);
+    }
+    else if EQ("strlen") {
+      lua_pushintegral(L, lua_strlen(L, getnum));
+    }
+    else if EQ("tocfunction") {
+      lua_pushcfunction(L, lua_tocfunction(L, getnum));
+    }
+    else if EQ("return") {
+      return getnum;
+    }
+    else if EQ("gettop") {
+      lua_pushintegral(L, lua_gettop(L));
+    }
+    else if EQ("settop") {
+      lua_settop(L, getnum);
+    }
+    else if EQ("pop") {
+      lua_pop(L, getnum);
+    }
+    else if EQ("pushnum") {
+      lua_pushintegral(L, getnum);
+    }
+    else if EQ("pushnil") {
+      lua_pushnil(L);
+    }
+    else if EQ("pushbool") {
+      lua_pushboolean(L, getnum);
+    }
+    else if EQ("tobool") {
+      lua_pushintegral(L, lua_toboolean(L, getnum));
+    }
+    else if EQ("pushvalue") {
+      lua_pushvalue(L, getnum);
+    }
+    else if EQ("pushcclosure") {
+      lua_pushcclosure(L, testC, getnum);
+    }
+    else if EQ("pushupvalues") {
+      lua_pushupvalues(L);
+    }
+    else if EQ("remove") {
+      lua_remove(L, getnum);
+    }
+    else if EQ("insert") {
+      lua_insert(L, getnum);
+    }
+    else if EQ("replace") {
+      lua_replace(L, getnum);
+    }
+    else if EQ("gettable") {
+      lua_gettable(L, getnum);
+    }
+    else if EQ("settable") {
+      lua_settable(L, getnum);
+    }
+    else if EQ("next") {
+      lua_next(L, -2);
+    }
+    else if EQ("concat") {
+      lua_concat(L, getnum);
+    }
+    else if EQ("lessthan") {
+      int a = getnum;
+      lua_pushboolean(L, lua_lessthan(L, a, getnum));
+    }
+    else if EQ("equal") {
+      int a = getnum;
+      lua_pushboolean(L, lua_equal(L, a, getnum));
+    }
+    else if EQ("rawcall") {
+      int narg = getnum;
+      int nres = getnum;
+      lua_call(L, narg, nres);
+    }
+    else if EQ("call") {
+      int narg = getnum;
+      int nres = getnum;
+      lua_pcall(L, narg, nres, 0);
+    }
+    else if EQ("loadstring") {
+      size_t sl;
+      const char *s = luaL_checklstring(L, getnum, &sl);
+      luaL_loadbuffer(L, s, sl, s);
+    }
+    else if EQ("loadfile") {
+      luaL_loadfile(L, luaL_checkstring(L, getnum));
+    }
+    else if EQ("setmetatable") {
+      lua_setmetatable(L, getnum);
+    }
+    else if EQ("getmetatable") {
+      if (lua_getmetatable(L, getnum) == 0)
+        lua_pushnil(L);
+    }
+    else if EQ("type") {
+      lua_pushstring(L, lua_typename(L, lua_type(L, getnum)));
+    }
+    else if EQ("getn") {
+      int i = getnum;
+      lua_pushintegral(L, luaL_getn(L, i));
+    }
+    else if EQ("setn") {
+      int i = getnum;
+      int n = cast(int, lua_tonumber(L, -1));
+      luaL_setn(L, i, n);
+      lua_pop(L, 1);
+    }
+    else luaL_error(L, "unknown instruction %s", buff);
+  }
+  return 0;
+}
+
+/* }====================================================== */
+
+
+/*
+** {======================================================
+** tests for yield inside hooks
+** =======================================================
+*/
+
+static void yieldf (lua_State *L, lua_Debug *ar) {
+  lua_yield(L, 0);
+}
+
+static int setyhook (lua_State *L) {
+  if (lua_isnoneornil(L, 1))
+    lua_sethook(L, NULL, 0, 0);  /* turn off hooks */
+  else {
+    const char *smask = luaL_checkstring(L, 1);
+    int count = luaL_optint(L, 2, 0);
+    int mask = 0;
+    if (strchr(smask, 'l')) mask |= LUA_MASKLINE;
+    if (count > 0) mask |= LUA_MASKCOUNT;
+    lua_sethook(L, yieldf, mask, count);
+  }
+  return 0;
+}
+
+
+static int coresume (lua_State *L) {
+  int status;
+  lua_State *co = lua_tothread(L, 1);
+  luaL_argcheck(L, co, 1, "coroutine expected");
+  status = lua_resume(co, 0);
+  if (status != 0) {
+    lua_pushboolean(L, 0);
+    lua_insert(L, -2);
+    return 2;  /* return false + error message */
+  }
+  else {
+    lua_pushboolean(L, 1);
+    return 1;
+  }
+}
+
+/* }====================================================== */
+
+
+
+static const struct luaL_reg tests_funcs[] = {
+  {"hash", hash_query},
+  {"limits", get_limits},
+  {"listcode", listcode},
+  {"listk", listk},
+  {"listlocals", listlocals},
+  {"loadlib", loadlib},
+  {"stacklevel", stacklevel},
+  {"querystr", string_query},
+  {"querytab", table_query},
+  {"doit", test_do},
+  {"testC", testC},
+  {"ref", tref},
+  {"getref", getref},
+  {"unref", unref},
+  {"d2s", d2s},
+  {"s2d", s2d},
+  {"metatable", metatable},
+  {"upvalue", upvalue},
+  {"newuserdata", newuserdata},
+  {"pushuserdata", pushuserdata},
+  {"udataval", udataval},
+  {"doonnewstack", doonnewstack},
+  {"newstate", newstate},
+  {"closestate", closestate},
+  {"doremote", doremote},
+  {"log2", log2_aux},
+  {"int2fb", int2fb_aux},
+  {"totalmem", mem_query},
+  {"resume", coresume},
+  {"setyhook", setyhook},
+  {NULL, NULL}
+};
+
+
+static void fim (void) {
+  if (!islocked)
+    lua_close(lua_state);
+  lua_assert(memdebug_numblocks == 0);
+  lua_assert(memdebug_total == 0);
+}
+
+
+static int l_panic (lua_State *L) {
+  UNUSED(L);
+  fprintf(stderr, "unable to recover; exiting\n");
+  return 0;
+}
+
+
+int luaB_opentests (lua_State *L) {
+  lua_atpanic(L, l_panic);
+  lua_userstateopen(L);  /* init lock */
+  lua_state = L;  /* keep first state to be opened */
+  luaL_openlib(L, "T", tests_funcs, 0);
+  atexit(fim);
+  return 0;
+}
+
+
+#undef main
+int main (int argc, char *argv[]) {
+  char *limit = getenv("MEMLIMIT");
+  if (limit)
+    memdebug_memlimit = strtoul(limit, NULL, 10);
+  l_main(argc, argv);
+  return 0;
+}
+
+#endif
diff --git a/lib/lua/src/ltm.c b/lib/lua/src/ltm.c
index 204bf46..5ad7858 100644
--- a/lib/lua/src/ltm.c
+++ b/lib/lua/src/ltm.c
@@ -1,70 +1,70 @@
-/*

-** $Id: ltm.c,v 1.3 2004-11-27 21:35:20 pixel Exp $

-** Tag methods

-** See Copyright Notice in lua.h

-*/

-

-

-#include <string.h>

-

-#define ltm_c

-

-#include "lua.h"

-

-#include "lobject.h"

-#include "lstate.h"

-#include "lstring.h"

-#include "ltable.h"

-#include "ltm.h"

-

-

-

-const char *const luaT_typenames[] = {

-  "nil", "boolean", "userdata", "number",

-  "string", "table", "function", "userdata", "thread"

-};

-

-

-void luaT_init (lua_State *L) {

-  static const char *const luaT_eventname[] = {  /* ORDER TM */

-    "__index", "__newindex",

-    "__gc", "__mode", "__eq",

-    "__add", "__sub", "__mul", "__div",

-    "__pow", "__unm", "__lt", "__le",

-    "__concat", "__call"

-  };

-  int i;

-  for (i=0; i<TM_N; i++) {

-    G(L)->tmname[i] = luaS_new(L, luaT_eventname[i]);

-    luaS_fix(G(L)->tmname[i]);  /* never collect these names */

-  }

-}

-

-

-/*

-** function to be used with macro "fasttm": optimized for absence of

-** tag methods

-*/

-const TObject *luaT_gettm (Table *events, TMS event, TString *ename) {

-  const TObject *tm = luaH_getstr(events, ename);

-  lua_assert(event <= TM_EQ);

-  if (ttisnil(tm)) {  /* no tag method? */

-    events->flags |= cast(lu_byte, 1u<<event);  /* cache this fact */

-    return NULL;

-  }

-  else return tm;

-}

-

-

-const TObject *luaT_gettmbyobj (lua_State *L, const TObject *o, TMS event) {

-  TString *ename = G(L)->tmname[event];

-  switch (ttype(o)) {

-    case LUA_TTABLE:

-      return luaH_getstr(hvalue(o)->metatable, ename);

-    case LUA_TUSERDATA:

-      return luaH_getstr(uvalue(o)->uv.metatable, ename);

-    default:

-      return &luaO_nilobject;

-  }

-}

-

+/*
+** $Id: ltm.c,v 1.4 2004-11-27 21:46:07 pixel Exp $
+** Tag methods
+** See Copyright Notice in lua.h
+*/
+
+
+#include <string.h>
+
+#define ltm_c
+
+#include "lua.h"
+
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+
+
+
+const char *const luaT_typenames[] = {
+  "nil", "boolean", "userdata", "number",
+  "string", "table", "function", "userdata", "thread"
+};
+
+
+void luaT_init (lua_State *L) {
+  static const char *const luaT_eventname[] = {  /* ORDER TM */
+    "__index", "__newindex",
+    "__gc", "__mode", "__eq",
+    "__add", "__sub", "__mul", "__div",
+    "__pow", "__unm", "__lt", "__le",
+    "__concat", "__call"
+  };
+  int i;
+  for (i=0; i<TM_N; i++) {
+    G(L)->tmname[i] = luaS_new(L, luaT_eventname[i]);
+    luaS_fix(G(L)->tmname[i]);  /* never collect these names */
+  }
+}
+
+
+/*
+** function to be used with macro "fasttm": optimized for absence of
+** tag methods
+*/
+const TObject *luaT_gettm (Table *events, TMS event, TString *ename) {
+  const TObject *tm = luaH_getstr(events, ename);
+  lua_assert(event <= TM_EQ);
+  if (ttisnil(tm)) {  /* no tag method? */
+    events->flags |= cast(lu_byte, 1u<<event);  /* cache this fact */
+    return NULL;
+  }
+  else return tm;
+}
+
+
+const TObject *luaT_gettmbyobj (lua_State *L, const TObject *o, TMS event) {
+  TString *ename = G(L)->tmname[event];
+  switch (ttype(o)) {
+    case LUA_TTABLE:
+      return luaH_getstr(hvalue(o)->metatable, ename);
+    case LUA_TUSERDATA:
+      return luaH_getstr(uvalue(o)->uv.metatable, ename);
+    default:
+      return &luaO_nilobject;
+  }
+}
+
diff --git a/lib/lua/src/luacomp.c b/lib/lua/src/luacomp.c
index bac561b..87372a2 100644
--- a/lib/lua/src/luacomp.c
+++ b/lib/lua/src/luacomp.c
@@ -1,82 +1,82 @@
-/*

- ** $Id: luacomp.c,v 1.5 2004-11-27 21:35:20 pixel Exp $

- ** Lua compiler (saves bytecodes to files; also list bytecodes)

- ** Highly hacked by Nicolas "Pixel" Noble to be transformed into a

- ** small form-factor LUA compiler.

- ** See Copyright Notice in lua.h

- */

-

-#include <stdio.h>

-#include <stdlib.h>

-#include <string.h>

-

-#include "lua.h"

-#include "lauxlib.h"

-

-#include "lfunc.h"

-#include "lmem.h"

-#include "lobject.h"

-#include "lopcodes.h"

-#include "lstring.h"

-#include "lundump.h"

-

-#ifndef PROGNAME

-#define PROGNAME	"luacomp"	/* program name */

-#endif

-

-const char * progname = PROGNAME;	/* actual program name */

-

-static Proto * toproto(lua_State * L, int i) {

-    const Closure * c = (const Closure *) lua_topointer(L, i);

-

-    return c->l.p;

-}

-

-static Proto * combine(lua_State * L, int n) {

-    if (n == 1)

-	return toproto(L, -1);

-    else {

-	int i, pc = 0;

-	Proto * f = luaF_newproto(L);

-

-	f->source = luaS_newliteral(L, "=(" PROGNAME ")");

-	f->maxstacksize = 1;

-	f->p = luaM_newvector(L, n, Proto *);

-	f->sizep = n;

-	f->sizecode = 2 * n + 1;

-	f->code = luaM_newvector(L, f->sizecode, Instruction);

-	for (i = 0; i < n; i++) {

-	    f->p[i] = toproto(L, i - n);

-	    f->code[pc++] = CREATE_ABx(OP_CLOSURE, 0, i);

-	    f->code[pc++] = CREATE_ABC(OP_CALL, 0, 1, 1);

-	}

-	f->code[pc++] = CREATE_ABC(OP_RETURN, 0, 1, 0);

-	return f;

-    }

-}

-

-static void strip(lua_State * L, Proto * f) {

-    int i, n = f->sizep;

-    luaM_freearray(L, f->lineinfo, f->sizelineinfo, int);

-    luaM_freearray(L, f->locvars, f->sizelocvars, struct LocVar);

-

-    luaM_freearray(L, f->upvalues, f->sizeupvalues, TString *);

-    f->lineinfo = NULL;

-    f->sizelineinfo = 0;

-    f->locvars = NULL;

-    f->sizelocvars = 0;

-    f->upvalues = NULL;

-    f->sizeupvalues = 0;

-    f->source = luaS_newliteral(L, "=(none)");

-    for (i = 0; i < n; i++)

-	strip(L, f->p[i]);

-}

-

-void luacmain(lua_State * L, int stripping, lua_Chunkwriter w, void *uD) {

-    Proto * f;

-

-    f = combine(L, lua_gettop(L));

-    if (stripping)

-	strip(L, f);

-    luaU_dump(L, f, w, uD);

-}

+/*
+ ** $Id: luacomp.c,v 1.6 2004-11-27 21:46:07 pixel Exp $
+ ** Lua compiler (saves bytecodes to files; also list bytecodes)
+ ** Highly hacked by Nicolas "Pixel" Noble to be transformed into a
+ ** small form-factor LUA compiler.
+ ** See Copyright Notice in lua.h
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lua.h"
+#include "lauxlib.h"
+
+#include "lfunc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lstring.h"
+#include "lundump.h"
+
+#ifndef PROGNAME
+#define PROGNAME	"luacomp"	/* program name */
+#endif
+
+const char * progname = PROGNAME;	/* actual program name */
+
+static Proto * toproto(lua_State * L, int i) {
+    const Closure * c = (const Closure *) lua_topointer(L, i);
+
+    return c->l.p;
+}
+
+static Proto * combine(lua_State * L, int n) {
+    if (n == 1)
+	return toproto(L, -1);
+    else {
+	int i, pc = 0;
+	Proto * f = luaF_newproto(L);
+
+	f->source = luaS_newliteral(L, "=(" PROGNAME ")");
+	f->maxstacksize = 1;
+	f->p = luaM_newvector(L, n, Proto *);
+	f->sizep = n;
+	f->sizecode = 2 * n + 1;
+	f->code = luaM_newvector(L, f->sizecode, Instruction);
+	for (i = 0; i < n; i++) {
+	    f->p[i] = toproto(L, i - n);
+	    f->code[pc++] = CREATE_ABx(OP_CLOSURE, 0, i);
+	    f->code[pc++] = CREATE_ABC(OP_CALL, 0, 1, 1);
+	}
+	f->code[pc++] = CREATE_ABC(OP_RETURN, 0, 1, 0);
+	return f;
+    }
+}
+
+static void strip(lua_State * L, Proto * f) {
+    int i, n = f->sizep;
+    luaM_freearray(L, f->lineinfo, f->sizelineinfo, int);
+    luaM_freearray(L, f->locvars, f->sizelocvars, struct LocVar);
+
+    luaM_freearray(L, f->upvalues, f->sizeupvalues, TString *);
+    f->lineinfo = NULL;
+    f->sizelineinfo = 0;
+    f->locvars = NULL;
+    f->sizelocvars = 0;
+    f->upvalues = NULL;
+    f->sizeupvalues = 0;
+    f->source = luaS_newliteral(L, "=(none)");
+    for (i = 0; i < n; i++)
+	strip(L, f->p[i]);
+}
+
+void luacmain(lua_State * L, int stripping, lua_Chunkwriter w, void *uD) {
+    Proto * f;
+
+    f = combine(L, lua_gettop(L));
+    if (stripping)
+	strip(L, f);
+    luaU_dump(L, f, w, uD);
+}
diff --git a/lib/lua/src/lundump.c b/lib/lua/src/lundump.c
index be2b586..7d9f031 100644
--- a/lib/lua/src/lundump.c
+++ b/lib/lua/src/lundump.c
@@ -1,286 +1,286 @@
-/*

-** $Id: lundump.c,v 1.3 2004-11-27 21:35:20 pixel Exp $

-** load pre-compiled Lua chunks

-** See Copyright Notice in lua.h

-*/

-

-#define lundump_c

-

-#include "lua.h"

-

-#include "ldebug.h"

-#include "lfunc.h"

-#include "lmem.h"

-#include "lopcodes.h"

-#include "lstring.h"

-#include "lundump.h"

-#include "lzio.h"

-

-#define	LoadByte	(lu_byte) ezgetc

-

-typedef struct {

- lua_State* L;

- ZIO* Z;

- Mbuffer* b;

- int swap;

- const char* name;

-} LoadState;

-

-static void unexpectedEOZ (LoadState* S)

-{

- luaG_runerror(S->L,"unexpected end of file in %s",S->name);

-}

-

-static int ezgetc (LoadState* S)

-{

- int c=zgetc(S->Z);

- if (c==EOZ) unexpectedEOZ(S);

- return c;

-}

-

-static void ezread (LoadState* S, void* b, int n)

-{

- int r=luaZ_read(S->Z,b,n);

- if (r!=0) unexpectedEOZ(S);

-}

-

-static void LoadBlock (LoadState* S, void* b, size_t size)

-{

- if (S->swap)

- {

-  char* p=(char*) b+size-1;

-  int n=size;

-  while (n--) *p--=(char)ezgetc(S);

- }

- else

-  ezread(S,b,size);

-}

-

-static void LoadVector (LoadState* S, void* b, int m, size_t size)

-{

- if (S->swap)

- {

-  char* q=(char*) b;

-  while (m--)

-  {

-   char* p=q+size-1;

-   int n=size;

-   while (n--) *p--=(char)ezgetc(S);

-   q+=size;

-  }

- }

- else

-  ezread(S,b,m*size);

-}

-

-static int LoadInt (LoadState* S)

-{

- int x;

- LoadBlock(S,&x,sizeof(x));

- if (x<0) luaG_runerror(S->L,"bad integer in %s",S->name);

- return x;

-}

-

-static size_t LoadSize (LoadState* S)

-{

- size_t x;

- LoadBlock(S,&x,sizeof(x));

- return x;

-}

-

-static lua_Number LoadNumber (LoadState* S)

-{

- lua_Number x;

- LoadBlock(S,&x,sizeof(x));

- return x;

-}

-

-static TString* LoadString (LoadState* S)

-{

- size_t size=LoadSize(S);

- if (size==0)

-  return NULL;

- else

- {

-  char* s=luaZ_openspace(S->L,S->b,size);

-  ezread(S,s,size);

-  return luaS_newlstr(S->L,s,size-1);		/* remove trailing '\0' */

- }

-}

-

-static void LoadCode (LoadState* S, Proto* f)

-{

- int size=LoadInt(S);

- f->code=luaM_newvector(S->L,size,Instruction);

- f->sizecode=size;

- LoadVector(S,f->code,size,sizeof(*f->code));

-}

-

-static void LoadLocals (LoadState* S, Proto* f)

-{

- int i,n;

- n=LoadInt(S);

- f->locvars=luaM_newvector(S->L,n,LocVar);

- f->sizelocvars=n;

- for (i=0; i<n; i++)

- {

-  f->locvars[i].varname=LoadString(S);

-  f->locvars[i].startpc=LoadInt(S);

-  f->locvars[i].endpc=LoadInt(S);

- }

-}

-

-static void LoadLines (LoadState* S, Proto* f)

-{

- int size=LoadInt(S);

- f->lineinfo=luaM_newvector(S->L,size,int);

- f->sizelineinfo=size;

- LoadVector(S,f->lineinfo,size,sizeof(*f->lineinfo));

-}

-

-static void LoadUpvalues (LoadState* S, Proto* f)

-{

- int i,n;

- n=LoadInt(S);

- if (n!=0 && n!=f->nups) 

-  luaG_runerror(S->L,"bad nupvalues in %s: read %d; expected %d",

-		S->name,n,f->nups);

- f->upvalues=luaM_newvector(S->L,n,TString*);

- f->sizeupvalues=n;

- for (i=0; i<n; i++) f->upvalues[i]=LoadString(S);

-}

-

-static Proto* LoadFunction (LoadState* S, TString* p);

-

-static void LoadConstants (LoadState* S, Proto* f)

-{

- int i,n;

- n=LoadInt(S);

- f->k=luaM_newvector(S->L,n,TObject);

- f->sizek=n;

- for (i=0; i<n; i++)

- {

-  TObject* o=&f->k[i];

-  int t=LoadByte(S);

-  switch (t)

-  {

-   case LUA_TNUMBER:

-	setnvalue(o,LoadNumber(S));

-	break;

-   case LUA_TSTRING:

-	setsvalue2n(o,LoadString(S));

-	break;

-   case LUA_TNIL:

-   	setnilvalue(o);

-	break;

-   default:

-	luaG_runerror(S->L,"bad constant type (%d) in %s",t,S->name);

-	break;

-  }

- }

- n=LoadInt(S);

- f->p=luaM_newvector(S->L,n,Proto*);

- f->sizep=n;

- for (i=0; i<n; i++) f->p[i]=LoadFunction(S,f->source);

-}

-

-static Proto* LoadFunction (LoadState* S, TString* p)

-{

- Proto* f=luaF_newproto(S->L);

- f->source=LoadString(S); if (f->source==NULL) f->source=p;

- f->lineDefined=LoadInt(S);

- f->nups=LoadByte(S);

- f->numparams=LoadByte(S);

- f->is_vararg=LoadByte(S);

- f->maxstacksize=LoadByte(S);

- LoadLines(S,f);

- LoadLocals(S,f);

- LoadUpvalues(S,f);

- LoadConstants(S,f);

- LoadCode(S,f);

-#ifndef TRUST_BINARIES

- if (!luaG_checkcode(f)) luaG_runerror(S->L,"bad code in %s",S->name);

-#endif

- return f;

-}

-

-static void LoadSignature (LoadState* S)

-{

- const char* s=LUA_SIGNATURE;

- while (*s!=0 && ezgetc(S)==*s)

-  ++s;

- if (*s!=0) luaG_runerror(S->L,"bad signature in %s",S->name);

-}

-

-static void TestSize (LoadState* S, int s, const char* what)

-{

- int r=LoadByte(S);

- if (r!=s)

-  luaG_runerror(S->L,"virtual machine mismatch in %s: "

-	"size of %s is %d but read %d",S->name,what,s,r);

-}

-

-#define TESTSIZE(s,w)	TestSize(S,s,w)

-#define V(v)		v/16,v%16

-

-static void LoadHeader (LoadState* S)

-{

- int version;

- lua_Number x,tx=TEST_NUMBER;

- LoadSignature(S);

- version=LoadByte(S);

- if (version>VERSION)

-  luaG_runerror(S->L,"%s too new: "

-	"read version %d.%d; expected at most %d.%d",

-	S->name,V(version),V(VERSION));

- if (version<VERSION0)				/* check last major change */

-  luaG_runerror(S->L,"%s too old: "

-	"read version %d.%d; expected at least %d.%d",

-	S->name,V(version),V(VERSION0));

- S->swap=(luaU_endianness()!=LoadByte(S));	/* need to swap bytes? */

- TESTSIZE(sizeof(int),"int");

- TESTSIZE(sizeof(size_t), "size_t");

- TESTSIZE(sizeof(Instruction), "Instruction");

- TESTSIZE(SIZE_OP, "OP");

- TESTSIZE(SIZE_A, "A");

- TESTSIZE(SIZE_B, "B");

- TESTSIZE(SIZE_C, "C");

- TESTSIZE(sizeof(lua_Number), "number");

- x=LoadNumber(S);

- if ((long)x!=(long)tx)		/* disregard errors in last bits of fraction */

-  luaG_runerror(S->L,"unknown number format in %s",S->name);

-}

-

-static Proto* LoadChunk (LoadState* S)

-{

- LoadHeader(S);

- return LoadFunction(S,NULL);

-}

-

-/*

-** load precompiled chunk

-*/

-Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff)

-{

- LoadState S;

- const char* s=zname(Z);

- if (*s=='@' || *s=='=')

-  S.name=s+1;

- else if (*s==LUA_SIGNATURE[0])

-  S.name="binary string";

- else

-  S.name=s;

- S.L=L;

- S.Z=Z;

- S.b=buff;

- return LoadChunk(&S);

-}

-

-/*

-** find byte order

-*/

-int luaU_endianness (void)

-{

- int x=1;

- return *(char*)&x;

-}

+/*
+** $Id: lundump.c,v 1.4 2004-11-27 21:46:07 pixel Exp $
+** load pre-compiled Lua chunks
+** See Copyright Notice in lua.h
+*/
+
+#define lundump_c
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "lfunc.h"
+#include "lmem.h"
+#include "lopcodes.h"
+#include "lstring.h"
+#include "lundump.h"
+#include "lzio.h"
+
+#define	LoadByte	(lu_byte) ezgetc
+
+typedef struct {
+ lua_State* L;
+ ZIO* Z;
+ Mbuffer* b;
+ int swap;
+ const char* name;
+} LoadState;
+
+static void unexpectedEOZ (LoadState* S)
+{
+ luaG_runerror(S->L,"unexpected end of file in %s",S->name);
+}
+
+static int ezgetc (LoadState* S)
+{
+ int c=zgetc(S->Z);
+ if (c==EOZ) unexpectedEOZ(S);
+ return c;
+}
+
+static void ezread (LoadState* S, void* b, int n)
+{
+ int r=luaZ_read(S->Z,b,n);
+ if (r!=0) unexpectedEOZ(S);
+}
+
+static void LoadBlock (LoadState* S, void* b, size_t size)
+{
+ if (S->swap)
+ {
+  char* p=(char*) b+size-1;
+  int n=size;
+  while (n--) *p--=(char)ezgetc(S);
+ }
+ else
+  ezread(S,b,size);
+}
+
+static void LoadVector (LoadState* S, void* b, int m, size_t size)
+{
+ if (S->swap)
+ {
+  char* q=(char*) b;
+  while (m--)
+  {
+   char* p=q+size-1;
+   int n=size;
+   while (n--) *p--=(char)ezgetc(S);
+   q+=size;
+  }
+ }
+ else
+  ezread(S,b,m*size);
+}
+
+static int LoadInt (LoadState* S)
+{
+ int x;
+ LoadBlock(S,&x,sizeof(x));
+ if (x<0) luaG_runerror(S->L,"bad integer in %s",S->name);
+ return x;
+}
+
+static size_t LoadSize (LoadState* S)
+{
+ size_t x;
+ LoadBlock(S,&x,sizeof(x));
+ return x;
+}
+
+static lua_Number LoadNumber (LoadState* S)
+{
+ lua_Number x;
+ LoadBlock(S,&x,sizeof(x));
+ return x;
+}
+
+static TString* LoadString (LoadState* S)
+{
+ size_t size=LoadSize(S);
+ if (size==0)
+  return NULL;
+ else
+ {
+  char* s=luaZ_openspace(S->L,S->b,size);
+  ezread(S,s,size);
+  return luaS_newlstr(S->L,s,size-1);		/* remove trailing '\0' */
+ }
+}
+
+static void LoadCode (LoadState* S, Proto* f)
+{
+ int size=LoadInt(S);
+ f->code=luaM_newvector(S->L,size,Instruction);
+ f->sizecode=size;
+ LoadVector(S,f->code,size,sizeof(*f->code));
+}
+
+static void LoadLocals (LoadState* S, Proto* f)
+{
+ int i,n;
+ n=LoadInt(S);
+ f->locvars=luaM_newvector(S->L,n,LocVar);
+ f->sizelocvars=n;
+ for (i=0; i<n; i++)
+ {
+  f->locvars[i].varname=LoadString(S);
+  f->locvars[i].startpc=LoadInt(S);
+  f->locvars[i].endpc=LoadInt(S);
+ }
+}
+
+static void LoadLines (LoadState* S, Proto* f)
+{
+ int size=LoadInt(S);
+ f->lineinfo=luaM_newvector(S->L,size,int);
+ f->sizelineinfo=size;
+ LoadVector(S,f->lineinfo,size,sizeof(*f->lineinfo));
+}
+
+static void LoadUpvalues (LoadState* S, Proto* f)
+{
+ int i,n;
+ n=LoadInt(S);
+ if (n!=0 && n!=f->nups) 
+  luaG_runerror(S->L,"bad nupvalues in %s: read %d; expected %d",
+		S->name,n,f->nups);
+ f->upvalues=luaM_newvector(S->L,n,TString*);
+ f->sizeupvalues=n;
+ for (i=0; i<n; i++) f->upvalues[i]=LoadString(S);
+}
+
+static Proto* LoadFunction (LoadState* S, TString* p);
+
+static void LoadConstants (LoadState* S, Proto* f)
+{
+ int i,n;
+ n=LoadInt(S);
+ f->k=luaM_newvector(S->L,n,TObject);
+ f->sizek=n;
+ for (i=0; i<n; i++)
+ {
+  TObject* o=&f->k[i];
+  int t=LoadByte(S);
+  switch (t)
+  {
+   case LUA_TNUMBER:
+	setnvalue(o,LoadNumber(S));
+	break;
+   case LUA_TSTRING:
+	setsvalue2n(o,LoadString(S));
+	break;
+   case LUA_TNIL:
+   	setnilvalue(o);
+	break;
+   default:
+	luaG_runerror(S->L,"bad constant type (%d) in %s",t,S->name);
+	break;
+  }
+ }
+ n=LoadInt(S);
+ f->p=luaM_newvector(S->L,n,Proto*);
+ f->sizep=n;
+ for (i=0; i<n; i++) f->p[i]=LoadFunction(S,f->source);
+}
+
+static Proto* LoadFunction (LoadState* S, TString* p)
+{
+ Proto* f=luaF_newproto(S->L);
+ f->source=LoadString(S); if (f->source==NULL) f->source=p;
+ f->lineDefined=LoadInt(S);
+ f->nups=LoadByte(S);
+ f->numparams=LoadByte(S);
+ f->is_vararg=LoadByte(S);
+ f->maxstacksize=LoadByte(S);
+ LoadLines(S,f);
+ LoadLocals(S,f);
+ LoadUpvalues(S,f);
+ LoadConstants(S,f);
+ LoadCode(S,f);
+#ifndef TRUST_BINARIES
+ if (!luaG_checkcode(f)) luaG_runerror(S->L,"bad code in %s",S->name);
+#endif
+ return f;
+}
+
+static void LoadSignature (LoadState* S)
+{
+ const char* s=LUA_SIGNATURE;
+ while (*s!=0 && ezgetc(S)==*s)
+  ++s;
+ if (*s!=0) luaG_runerror(S->L,"bad signature in %s",S->name);
+}
+
+static void TestSize (LoadState* S, int s, const char* what)
+{
+ int r=LoadByte(S);
+ if (r!=s)
+  luaG_runerror(S->L,"virtual machine mismatch in %s: "
+	"size of %s is %d but read %d",S->name,what,s,r);
+}
+
+#define TESTSIZE(s,w)	TestSize(S,s,w)
+#define V(v)		v/16,v%16
+
+static void LoadHeader (LoadState* S)
+{
+ int version;
+ lua_Number x,tx=TEST_NUMBER;
+ LoadSignature(S);
+ version=LoadByte(S);
+ if (version>VERSION)
+  luaG_runerror(S->L,"%s too new: "
+	"read version %d.%d; expected at most %d.%d",
+	S->name,V(version),V(VERSION));
+ if (version<VERSION0)				/* check last major change */
+  luaG_runerror(S->L,"%s too old: "
+	"read version %d.%d; expected at least %d.%d",
+	S->name,V(version),V(VERSION0));
+ S->swap=(luaU_endianness()!=LoadByte(S));	/* need to swap bytes? */
+ TESTSIZE(sizeof(int),"int");
+ TESTSIZE(sizeof(size_t), "size_t");
+ TESTSIZE(sizeof(Instruction), "Instruction");
+ TESTSIZE(SIZE_OP, "OP");
+ TESTSIZE(SIZE_A, "A");
+ TESTSIZE(SIZE_B, "B");
+ TESTSIZE(SIZE_C, "C");
+ TESTSIZE(sizeof(lua_Number), "number");
+ x=LoadNumber(S);
+ if ((long)x!=(long)tx)		/* disregard errors in last bits of fraction */
+  luaG_runerror(S->L,"unknown number format in %s",S->name);
+}
+
+static Proto* LoadChunk (LoadState* S)
+{
+ LoadHeader(S);
+ return LoadFunction(S,NULL);
+}
+
+/*
+** load precompiled chunk
+*/
+Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff)
+{
+ LoadState S;
+ const char* s=zname(Z);
+ if (*s=='@' || *s=='=')
+  S.name=s+1;
+ else if (*s==LUA_SIGNATURE[0])
+  S.name="binary string";
+ else
+  S.name=s;
+ S.L=L;
+ S.Z=Z;
+ S.b=buff;
+ return LoadChunk(&S);
+}
+
+/*
+** find byte order
+*/
+int luaU_endianness (void)
+{
+ int x=1;
+ return *(char*)&x;
+}
diff --git a/lib/lua/src/lvm.c b/lib/lua/src/lvm.c
index c22c258..6c07b0f 100644
--- a/lib/lua/src/lvm.c
+++ b/lib/lua/src/lvm.c
@@ -1,784 +1,784 @@
-/*

-** $Id: lvm.c,v 1.4 2004-11-27 21:35:20 pixel Exp $

-** Lua virtual machine

-** See Copyright Notice in lua.h

-*/

-

-

-#include <stdarg.h>

-#include <stdlib.h>

-#include <string.h>

-

-/* needed only when `lua_number2str' uses `sprintf' */

-#include <stdio.h>

-

-#define lvm_c

-

-#include "lua.h"

-

-#include "ldebug.h"

-#include "ldo.h"

-#include "lfunc.h"

-#include "lgc.h"

-#include "lobject.h"

-#include "lopcodes.h"

-#include "lstate.h"

-#include "lstring.h"

-#include "ltable.h"

-#include "ltm.h"

-#include "lvm.h"

-

-

-

-/* function to convert a lua_Number to a string */

-#ifndef lua_number2str

-#define lua_number2str(s,n)     sprintf((s), LUA_NUMBER_FMT, (n))

-#endif

-

-

-/* limit for table tag-method chains (to avoid loops) */

-#define MAXTAGLOOP	100

-

-

-const TObject *luaV_tonumber (const TObject *obj, TObject *n) {

-  lua_Number num;

-  if (ttisnumber(obj)) return obj;

-  if (ttisstring(obj) && luaO_str2d(svalue(obj), &num)) {

-    setnvalue(n, num);

-    return n;

-  }

-  else

-    return NULL;

-}

-

-

-int luaV_tostring (lua_State *L, StkId obj) {

-  if (!ttisnumber(obj))

-    return 0;

-  else {

-    char s[32];  /* 16 digits, sign, point and \0  (+ some extra...) */

-    lua_number2str(s, nvalue(obj));

-    setsvalue2s(obj, luaS_new(L, s));

-    return 1;

-  }

-}

-

-

-static void traceexec (lua_State *L) {

-  lu_byte mask = L->hookmask;

-  if (mask > LUA_MASKLINE) {  /* instruction-hook set? */

-    if (L->hookcount == 0) {

-      resethookcount(L);

-      luaD_callhook(L, LUA_HOOKCOUNT, -1);

-      return;

-    }

-  }

-  if (mask & LUA_MASKLINE) {

-    CallInfo *ci = L->ci;

-    Proto *p = ci_func(ci)->l.p;

-    int newline = getline(p, pcRel(*ci->u.l.pc, p));

-    if (!L->hookinit) {

-      luaG_inithooks(L);

-      return;

-    }

-    lua_assert(ci->state & CI_HASFRAME);

-    if (pcRel(*ci->u.l.pc, p) == 0)  /* tracing may be starting now? */

-      ci->u.l.savedpc = *ci->u.l.pc;  /* initialize `savedpc' */

-    /* calls linehook when enters a new line or jumps back (loop) */

-    if (*ci->u.l.pc <= ci->u.l.savedpc ||

-        newline != getline(p, pcRel(ci->u.l.savedpc, p))) {

-      luaD_callhook(L, LUA_HOOKLINE, newline);

-      ci = L->ci;  /* previous call may reallocate `ci' */

-    }

-    ci->u.l.savedpc = *ci->u.l.pc;

-  }

-}

-

-

-static void callTMres (lua_State *L, const TObject *f,

-                       const TObject *p1, const TObject *p2) {

-  setobj2s(L->top, f);  /* push function */

-  setobj2s(L->top+1, p1);  /* 1st argument */

-  setobj2s(L->top+2, p2);  /* 2nd argument */

-  luaD_checkstack(L, 3);  /* cannot check before (could invalidate p1, p2) */

-  L->top += 3;

-  luaD_call(L, L->top - 3, 1);

-  L->top--;  /* result will be in L->top */

-}

-

-

-

-static void callTM (lua_State *L, const TObject *f,

-                    const TObject *p1, const TObject *p2, const TObject *p3) {

-  setobj2s(L->top, f);  /* push function */

-  setobj2s(L->top+1, p1);  /* 1st argument */

-  setobj2s(L->top+2, p2);  /* 2nd argument */

-  setobj2s(L->top+3, p3);  /* 3th argument */

-  luaD_checkstack(L, 4);  /* cannot check before (could invalidate p1...p3) */

-  L->top += 4;

-  luaD_call(L, L->top - 4, 0);

-}

-

-

-static const TObject *luaV_index (lua_State *L, const TObject *t,

-                                  TObject *key, int loop) {

-  const TObject *tm = fasttm(L, hvalue(t)->metatable, TM_INDEX);

-  if (tm == NULL) return &luaO_nilobject;  /* no TM */

-  if (ttisfunction(tm)) {

-    callTMres(L, tm, t, key);

-    return L->top;

-  }

-  else return luaV_gettable(L, tm, key, loop);

-}

-

-static const TObject *luaV_getnotable (lua_State *L, const TObject *t,

-                                       TObject *key, int loop) {

-  const TObject *tm = luaT_gettmbyobj(L, t, TM_INDEX);

-  if (ttisnil(tm))

-    luaG_typeerror(L, t, "index");

-  if (ttisfunction(tm)) {

-    callTMres(L, tm, t, key);

-    return L->top;

-  }

-  else return luaV_gettable(L, tm, key, loop);

-}

-

-

-/*

-** Function to index a table.

-** Receives the table at `t' and the key at `key'.

-** leaves the result at `res'.

-*/

-const TObject *luaV_gettable (lua_State *L, const TObject *t, TObject *key,

-                              int loop) {

-  if (loop > MAXTAGLOOP)

-    luaG_runerror(L, "loop in gettable");

-  if (ttistable(t)) {  /* `t' is a table? */

-    Table *h = hvalue(t);

-    const TObject *v = luaH_get(h, key);  /* do a primitive get */

-    if (!ttisnil(v)) return v;

-    else return luaV_index(L, t, key, loop+1);

-  }

-  else return luaV_getnotable(L, t, key, loop+1);

-}

-

-

-/*

-** Receives table at `t', key at `key' and value at `val'.

-*/

-void luaV_settable (lua_State *L, const TObject *t, TObject *key, StkId val) {

-  const TObject *tm;

-  int loop = 0;

-  do {

-    if (ttistable(t)) {  /* `t' is a table? */

-      Table *h = hvalue(t);

-      TObject *oldval = luaH_set(L, h, key); /* do a primitive set */

-      if (!ttisnil(oldval) ||  /* result is no nil? */

-          (tm = fasttm(L, h->metatable, TM_NEWINDEX)) == NULL) { /* or no TM? */

-        setobj2t(oldval, val);  /* write barrier */

-        return;

-      }

-      /* else will try the tag method */

-    }

-    else if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_NEWINDEX)))

-      luaG_typeerror(L, t, "index");

-    if (ttisfunction(tm)) {

-      callTM(L, tm, t, key, val);

-      return;

-    }

-    t = tm;  /* else repeat with `tm' */ 

-  } while (++loop <= MAXTAGLOOP);

-  luaG_runerror(L, "loop in settable");

-}

-

-

-static int call_binTM (lua_State *L, const TObject *p1, const TObject *p2,

-                       StkId res, TMS event) {

-  ptrdiff_t result = savestack(L, res);

-  const TObject *tm = luaT_gettmbyobj(L, p1, event);  /* try first operand */

-  if (ttisnil(tm))

-    tm = luaT_gettmbyobj(L, p2, event);  /* try second operand */

-  if (!ttisfunction(tm)) return 0;

-  callTMres(L, tm, p1, p2);

-  res = restorestack(L, result);  /* previous call may change stack */

-  setobjs2s(res, L->top);

-  return 1;

-}

-

-

-static const TObject *get_compTM (lua_State *L, Table *mt1, Table *mt2,

-                                  TMS event) {

-  const TObject *tm1 = fasttm(L, mt1, event);

-  const TObject *tm2;

-  if (tm1 == NULL) return NULL;  /* no metamethod */

-  if (mt1 == mt2) return tm1;  /* same metatables => same metamethods */

-  tm2 = fasttm(L, mt2, event);

-  if (tm2 == NULL) return NULL;  /* no metamethod */

-  if (luaO_rawequalObj(tm1, tm2))  /* same metamethods? */

-    return tm1;

-  return NULL;

-}

-

-

-static int call_orderTM (lua_State *L, const TObject *p1, const TObject *p2,

-                         TMS event) {

-  const TObject *tm1 = luaT_gettmbyobj(L, p1, event);

-  const TObject *tm2;

-  if (ttisnil(tm1)) return -1;  /* no metamethod? */

-  tm2 = luaT_gettmbyobj(L, p2, event);

-  if (!luaO_rawequalObj(tm1, tm2))  /* different metamethods? */

-    return -1;

-  callTMres(L, tm1, p1, p2);

-  return !l_isfalse(L->top);

-}

-

-

-static int luaV_strcmp (const TString *ls, const TString *rs) {

-  const char *l = getstr(ls);

-  size_t ll = ls->tsv.len;

-  const char *r = getstr(rs);

-  size_t lr = rs->tsv.len;

-  for (;;) {

-    int temp = strcoll(l, r);

-    if (temp != 0) return temp;

-    else {  /* strings are equal up to a `\0' */

-      size_t len = strlen(l);  /* index of first `\0' in both strings */

-      if (len == lr)  /* r is finished? */

-        return (len == ll) ? 0 : 1;

-      else if (len == ll)  /* l is finished? */

-        return -1;  /* l is smaller than r (because r is not finished) */

-      /* both strings longer than `len'; go on comparing (after the `\0') */

-      len++;

-      l += len; ll -= len; r += len; lr -= len;

-    }

-  }

-}

-

-

-int luaV_lessthan (lua_State *L, const TObject *l, const TObject *r) {

-  int res;

-  if (ttype(l) != ttype(r))

-    return luaG_ordererror(L, l, r);

-  else if (ttisnumber(l))

-    return nvalue(l) < nvalue(r);

-  else if (ttisstring(l))

-    return luaV_strcmp(tsvalue(l), tsvalue(r)) < 0;

-  else if ((res = call_orderTM(L, l, r, TM_LT)) != -1)

-    return res;

-  return luaG_ordererror(L, l, r);

-}

-

-

-static int luaV_lessequal (lua_State *L, const TObject *l, const TObject *r) {

-  int res;

-  if (ttype(l) != ttype(r))

-    return luaG_ordererror(L, l, r);

-  else if (ttisnumber(l))

-    return nvalue(l) <= nvalue(r);

-  else if (ttisstring(l))

-    return luaV_strcmp(tsvalue(l), tsvalue(r)) <= 0;

-  else if ((res = call_orderTM(L, l, r, TM_LE)) != -1)  /* first try `le' */

-    return res;

-  else if ((res = call_orderTM(L, r, l, TM_LT)) != -1)  /* else try `lt' */

-    return !res;

-  return luaG_ordererror(L, l, r);

-}

-

-

-int luaV_equalval (lua_State *L, const TObject *t1, const TObject *t2) {

-  const TObject *tm;

-  lua_assert(ttype(t1) == ttype(t2));

-  switch (ttype(t1)) {

-    case LUA_TNIL: return 1;

-    case LUA_TNUMBER: return nvalue(t1) == nvalue(t2);

-    case LUA_TBOOLEAN: return bvalue(t1) == bvalue(t2);  /* true must be 1 !! */

-    case LUA_TLIGHTUSERDATA: return pvalue(t1) == pvalue(t2);

-    case LUA_TUSERDATA: {

-      if (uvalue(t1) == uvalue(t2)) return 1;

-      tm = get_compTM(L, uvalue(t1)->uv.metatable, uvalue(t2)->uv.metatable,

-                         TM_EQ);

-      break;  /* will try TM */

-    }

-    case LUA_TTABLE: {

-      if (hvalue(t1) == hvalue(t2)) return 1;

-      tm = get_compTM(L, hvalue(t1)->metatable, hvalue(t2)->metatable, TM_EQ);

-      break;  /* will try TM */

-    }

-    default: return gcvalue(t1) == gcvalue(t2);

-  }

-  if (tm == NULL) return 0;  /* no TM? */

-  callTMres(L, tm, t1, t2);  /* call TM */

-  return !l_isfalse(L->top);

-}

-

-

-void luaV_concat (lua_State *L, int total, int last) {

-  do {

-    StkId top = L->base + last + 1;

-    int n = 2;  /* number of elements handled in this pass (at least 2) */

-    if (!tostring(L, top-2) || !tostring(L, top-1)) {

-      if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT))

-        luaG_concaterror(L, top-2, top-1);

-    } else if (tsvalue(top-1)->tsv.len > 0) {  /* if len=0, do nothing */

-      /* at least two string values; get as many as possible */

-      lu_mem tl = cast(lu_mem, tsvalue(top-1)->tsv.len) +

-                  cast(lu_mem, tsvalue(top-2)->tsv.len);

-      char *buffer;

-      int i;

-      while (n < total && tostring(L, top-n-1)) {  /* collect total length */

-        tl += tsvalue(top-n-1)->tsv.len;

-        n++;

-      }

-      if (tl > MAX_SIZET) luaG_runerror(L, "string size overflow");

-      buffer = luaZ_openspace(L, &G(L)->buff, tl);

-      tl = 0;

-      for (i=n; i>0; i--) {  /* concat all strings */

-        size_t l = tsvalue(top-i)->tsv.len;

-        memcpy(buffer+tl, svalue(top-i), l);

-        tl += l;

-      }

-      setsvalue2s(top-n, luaS_newlstr(L, buffer, tl));

-    }

-    total -= n-1;  /* got `n' strings to create 1 new */

-    last -= n-1;

-  } while (total > 1);  /* repeat until only 1 result left */

-}

-

-

-static void Arith (lua_State *L, StkId ra,

-                   const TObject *rb, const TObject *rc, TMS op) {

-  TObject tempb, tempc;

-  const TObject *b, *c;

-  if ((b = luaV_tonumber(rb, &tempb)) != NULL &&

-      (c = luaV_tonumber(rc, &tempc)) != NULL) {

-    switch (op) {

-      case TM_ADD: setnvalue(ra, nvalue(b) + nvalue(c)); break;

-      case TM_SUB: setnvalue(ra, nvalue(b) - nvalue(c)); break;

-      case TM_MUL: setnvalue(ra, nvalue(b) * nvalue(c)); break;

-      case TM_DIV: setnvalue(ra, nvalue(b) / nvalue(c)); break;

-      case TM_POW: {

-        const TObject *f = luaH_getstr(hvalue(gt(L)), G(L)->tmname[TM_POW]);

-        ptrdiff_t res = savestack(L, ra);

-        if (!ttisfunction(f))

-          luaG_runerror(L, "`__pow' (`^' operator) is not a function");

-        callTMres(L, f, b, c);

-        ra = restorestack(L, res);  /* previous call may change stack */

-        setobjs2s(ra, L->top);

-        break;

-      }

-      default: lua_assert(0); break;

-    }

-  }

-  else if (!call_binTM(L, rb, rc, ra, op))

-    luaG_aritherror(L, rb, rc);

-}

-

-

-

-/*

-** some macros for common tasks in `luaV_execute'

-*/

-

-#define runtime_check(L, c)	{ if (!(c)) return 0; }

-

-#define RA(i)	(base+GETARG_A(i))

-/* to be used after possible stack reallocation */

-#define XRA(i)	(L->base+GETARG_A(i))

-#define RB(i)	(base+GETARG_B(i))

-#define RKB(i)	((GETARG_B(i) < MAXSTACK) ? RB(i) : k+GETARG_B(i)-MAXSTACK)

-#define RC(i)	(base+GETARG_C(i))

-#define RKC(i)	((GETARG_C(i) < MAXSTACK) ? RC(i) : k+GETARG_C(i)-MAXSTACK)

-#define KBx(i)	(k+GETARG_Bx(i))

-

-

-#define dojump(pc, i)	((pc) += (i))

-

-

-StkId luaV_execute (lua_State *L) {

-  LClosure *cl;

-  TObject *k;

-  const Instruction *pc;

- callentry:  /* entry point when calling new functions */

-  L->ci->u.l.pc = &pc;

-  if (L->hookmask & LUA_MASKCALL)

-    luaD_callhook(L, LUA_HOOKCALL, -1);

- retentry:  /* entry point when returning to old functions */

-  lua_assert(L->ci->state == CI_SAVEDPC ||

-             L->ci->state == (CI_SAVEDPC | CI_CALLING));

-  L->ci->state = CI_HASFRAME;  /* activate frame */

-  pc = L->ci->u.l.savedpc;

-  cl = &clvalue(L->base - 1)->l;

-  k = cl->p->k;

-  /* main loop of interpreter */

-  for (;;) {

-    const Instruction i = *pc++;

-    StkId base, ra;

-    if ((L->hookmask & (LUA_MASKLINE | LUA_MASKCOUNT)) &&

-        (--L->hookcount == 0 || L->hookmask & LUA_MASKLINE)) {

-      traceexec(L);

-      if (L->ci->state & CI_YIELD) {  /* did hook yield? */

-        L->ci->u.l.savedpc = pc - 1;

-        L->ci->state = CI_YIELD | CI_SAVEDPC;

-        return NULL;

-      }

-      if (L->ci->state & CI_BREAK) {  /* did hook break? */

-        luaG_runerror(L, "breaking");

-        L->ci->state &= ~CI_BREAK;

-      }

-    }

-    /* warning!! several calls may realloc the stack and invalidate `ra' */

-    base = L->base;

-    ra = RA(i);

-    lua_assert(L->ci->state & CI_HASFRAME);

-    lua_assert(base == L->ci->base);

-    lua_assert(L->top <= L->stack + L->stacksize && L->top >= base);

-    lua_assert(L->top == L->ci->top ||

-         GET_OPCODE(i) == OP_CALL ||   GET_OPCODE(i) == OP_TAILCALL ||

-         GET_OPCODE(i) == OP_RETURN || GET_OPCODE(i) == OP_SETLISTO);

-    switch (GET_OPCODE(i)) {

-      case OP_MOVE: {

-        setobjs2s(ra, RB(i));

-        break;

-      }

-      case OP_LOADK: {

-        setobj2s(ra, KBx(i));

-        break;

-      }

-      case OP_LOADBOOL: {

-        setbvalue(ra, GETARG_B(i));

-        if (GETARG_C(i)) pc++;  /* skip next instruction (if C) */

-        break;

-      }

-      case OP_LOADNIL: {

-        TObject *rb = RB(i);

-        do {

-          setnilvalue(rb--);

-        } while (rb >= ra);

-        break;

-      }

-      case OP_GETUPVAL: {

-        int b = GETARG_B(i);

-        setobj2s(ra, cl->upvals[b]->v);

-        break;

-      }

-      case OP_GETGLOBAL: {

-        TObject *rb = KBx(i);

-        const TObject *v;

-        lua_assert(ttisstring(rb) && ttistable(&cl->g));

-        v = luaH_getstr(hvalue(&cl->g), tsvalue(rb));

-        if (!ttisnil(v)) { setobj2s(ra, v); }

-        else

-          setobj2s(XRA(i), luaV_index(L, &cl->g, rb, 0));

-        break;

-      }

-      case OP_GETTABLE: {

-        StkId rb = RB(i);

-        TObject *rc = RKC(i);

-        if (ttistable(rb)) {

-          const TObject *v = luaH_get(hvalue(rb), rc);

-          if (!ttisnil(v)) { setobj2s(ra, v); }

-          else

-            setobj2s(XRA(i), luaV_index(L, rb, rc, 0));

-        }

-        else

-          setobj2s(XRA(i), luaV_getnotable(L, rb, rc, 0));

-        break;

-      }

-      case OP_SETGLOBAL: {

-        lua_assert(ttisstring(KBx(i)) && ttistable(&cl->g));

-        luaV_settable(L, &cl->g, KBx(i), ra);

-        break;

-      }

-      case OP_SETUPVAL: {

-        int b = GETARG_B(i);

-        setobj(cl->upvals[b]->v, ra);  /* write barrier */

-        break;

-      }

-      case OP_SETTABLE: {

-        luaV_settable(L, ra, RKB(i), RKC(i));

-        break;

-      }

-      case OP_NEWTABLE: {

-        int b = GETARG_B(i);

-        b = fb2int(b);

-        sethvalue(ra, luaH_new(L, b, GETARG_C(i)));

-        luaC_checkGC(L);

-        break;

-      }

-      case OP_SELF: {

-        StkId rb = RB(i);

-        TObject *rc = RKC(i);

-        runtime_check(L, ttisstring(rc));

-        setobjs2s(ra+1, rb);

-        if (ttistable(rb)) {

-          const TObject *v = luaH_getstr(hvalue(rb), tsvalue(rc));

-          if (!ttisnil(v)) { setobj2s(ra, v); }

-          else

-            setobj2s(XRA(i), luaV_index(L, rb, rc, 0));

-        }

-        else

-          setobj2s(XRA(i), luaV_getnotable(L, rb, rc, 0));

-        break;

-      }

-      case OP_ADD: {

-        TObject *rb = RKB(i);

-        TObject *rc = RKC(i);

-        if (ttisnumber(rb) && ttisnumber(rc)) {

-          setnvalue(ra, nvalue(rb) + nvalue(rc));

-        }

-        else

-          Arith(L, ra, rb, rc, TM_ADD);

-        break;

-      }

-      case OP_SUB: {

-        TObject *rb = RKB(i);

-        TObject *rc = RKC(i);

-        if (ttisnumber(rb) && ttisnumber(rc)) {

-          setnvalue(ra, nvalue(rb) - nvalue(rc));

-        }

-        else

-          Arith(L, ra, rb, rc, TM_SUB);

-        break;

-      }

-      case OP_MUL: {

-        TObject *rb = RKB(i);

-        TObject *rc = RKC(i);

-        if (ttisnumber(rb) && ttisnumber(rc)) {

-          setnvalue(ra, nvalue(rb) * nvalue(rc));

-        }

-        else

-          Arith(L, ra, rb, rc, TM_MUL);

-        break;

-      }

-      case OP_DIV: {

-        TObject *rb = RKB(i);

-        TObject *rc = RKC(i);

-        if (ttisnumber(rb) && ttisnumber(rc)) {

-          setnvalue(ra, nvalue(rb) / nvalue(rc));

-        }

-        else

-          Arith(L, ra, rb, rc, TM_DIV);

-        break;

-      }

-      case OP_POW: {

-        Arith(L, ra, RKB(i), RKC(i), TM_POW);

-        break;

-      }

-      case OP_UNM: {

-        const TObject *rb = RB(i);

-        TObject temp;

-        if (tonumber(rb, &temp)) {

-          setnvalue(ra, -nvalue(rb));

-        }

-        else {

-          setnilvalue(&temp);

-          if (!call_binTM(L, RB(i), &temp, ra, TM_UNM))

-            luaG_aritherror(L, RB(i), &temp);

-        }

-        break;

-      }

-      case OP_NOT: {

-        int res = l_isfalse(RB(i));  /* next assignment may change this value */

-        setbvalue(ra, res);

-        break;

-      }

-      case OP_CONCAT: {

-        int b = GETARG_B(i);

-        int c = GETARG_C(i);

-        luaV_concat(L, c-b+1, c);  /* may change `base' (and `ra') */

-        base = L->base;

-        setobjs2s(RA(i), base+b);

-        luaC_checkGC(L);

-        break;

-      }

-      case OP_JMP: {

-        dojump(pc, GETARG_sBx(i));

-        break;

-      }

-      case OP_EQ: {

-        if (equalobj(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++;

-        else dojump(pc, GETARG_sBx(*pc) + 1);

-        break;

-      }

-      case OP_LT: {

-        if (luaV_lessthan(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++;

-        else dojump(pc, GETARG_sBx(*pc) + 1);

-        break;

-      }

-      case OP_LE: {

-        if (luaV_lessequal(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++;

-        else dojump(pc, GETARG_sBx(*pc) + 1);

-        break;

-      }

-      case OP_TEST: {

-        TObject *rb = RB(i);

-        if (l_isfalse(rb) == GETARG_C(i)) pc++;

-        else {

-          setobjs2s(ra, rb);

-          dojump(pc, GETARG_sBx(*pc) + 1);

-        }

-        break;

-      }

-      case OP_CALL:

-      case OP_TAILCALL: {

-        StkId firstResult;

-        int b = GETARG_B(i);

-        int nresults;

-        if (b != 0) L->top = ra+b;  /* else previous instruction set top */

-        nresults = GETARG_C(i) - 1;

-        firstResult = luaD_precall(L, ra);

-        if (firstResult) {

-          if (firstResult > L->top) {  /* yield? */

-            lua_assert(L->ci->state == (CI_C | CI_YIELD));

-            (L->ci - 1)->u.l.savedpc = pc;

-            (L->ci - 1)->state = CI_SAVEDPC;

-            return NULL;

-          }

-          /* it was a C function (`precall' called it); adjust results */

-          luaD_poscall(L, nresults, firstResult);

-          if (nresults >= 0) L->top = L->ci->top;

-        }

-        else {  /* it is a Lua function */

-          if (GET_OPCODE(i) == OP_CALL) {  /* regular call? */

-            (L->ci-1)->u.l.savedpc = pc;  /* save `pc' to return later */

-            (L->ci-1)->state = (CI_SAVEDPC | CI_CALLING);

-          }

-          else {  /* tail call: put new frame in place of previous one */

-            int aux;

-            base = (L->ci - 1)->base;  /* `luaD_precall' may change the stack */

-            ra = RA(i);

-            if (L->openupval) luaF_close(L, base);

-            for (aux = 0; ra+aux < L->top; aux++)  /* move frame down */

-              setobjs2s(base+aux-1, ra+aux);

-            (L->ci - 1)->top = L->top = base+aux;  /* correct top */

-            lua_assert(L->ci->state & CI_SAVEDPC);

-            (L->ci - 1)->u.l.savedpc = L->ci->u.l.savedpc;

-            (L->ci - 1)->u.l.tailcalls++;  /* one more call lost */

-            (L->ci - 1)->state = CI_SAVEDPC;

-            L->ci--;  /* remove new frame */

-            L->base = L->ci->base;

-          }

-          goto callentry;

-        }

-        break;

-      }

-      case OP_RETURN: {

-        CallInfo *ci = L->ci - 1;  /* previous function frame */

-        int b = GETARG_B(i);

-        if (b != 0) L->top = ra+b-1;

-        lua_assert(L->ci->state & CI_HASFRAME);

-        if (L->openupval) luaF_close(L, base);

-        L->ci->state = CI_SAVEDPC;  /* deactivate current function */

-        L->ci->u.l.savedpc = pc;

-        /* previous function was running `here'? */

-        if (!(ci->state & CI_CALLING)) {

-          lua_assert((ci->state & CI_C) || ci->u.l.pc != &pc);

-          return ra;  /* no: return */

-        }

-        else {  /* yes: continue its execution */

-          int nresults;

-          lua_assert(ci->u.l.pc == &pc &&

-                     ttisfunction(ci->base - 1) &&

-                     (ci->state & CI_SAVEDPC));

-          lua_assert(GET_OPCODE(*(ci->u.l.savedpc - 1)) == OP_CALL);

-          nresults = GETARG_C(*(ci->u.l.savedpc - 1)) - 1;

-          luaD_poscall(L, nresults, ra);

-          if (nresults >= 0) L->top = L->ci->top;

-          goto retentry;

-        }

-      }

-      case OP_FORLOOP: {

-        lua_Number step, idx, limit;

-        const TObject *plimit = ra+1;

-        const TObject *pstep = ra+2;

-        if (!ttisnumber(ra))

-          luaG_runerror(L, "`for' initial value must be a number");

-        if (!tonumber(plimit, ra+1))

-          luaG_runerror(L, "`for' limit must be a number");

-        if (!tonumber(pstep, ra+2))

-          luaG_runerror(L, "`for' step must be a number");

-        step = nvalue(pstep);

-        idx = nvalue(ra) + step;  /* increment index */

-        limit = nvalue(plimit);

-        if (step > 0 ? idx <= limit : idx >= limit) {

-          dojump(pc, GETARG_sBx(i));  /* jump back */

-          chgnvalue(ra, idx);  /* update index */

-        }

-        break;

-      }

-      case OP_TFORLOOP: {

-        int nvar = GETARG_C(i) + 1;

-        StkId cb = ra + nvar + 2;  /* call base */

-        setobjs2s(cb, ra);

-        setobjs2s(cb+1, ra+1);

-        setobjs2s(cb+2, ra+2);

-        L->top = cb+3;  /* func. + 2 args (state and index) */

-        luaD_call(L, cb, nvar);

-        L->top = L->ci->top;

-        ra = XRA(i) + 2;  /* final position of first result */

-        cb = ra + nvar;

-        do {  /* move results to proper positions */

-          nvar--;

-          setobjs2s(ra+nvar, cb+nvar);

-        } while (nvar > 0);

-        if (ttisnil(ra))  /* break loop? */

-          pc++;  /* skip jump (break loop) */

-        else

-          dojump(pc, GETARG_sBx(*pc) + 1);  /* jump back */

-        break;

-      }

-      case OP_TFORPREP: {  /* for compatibility only */

-        if (ttistable(ra)) {

-          setobjs2s(ra+1, ra);

-          setobj2s(ra, luaH_getstr(hvalue(gt(L)), luaS_new(L, "next")));

-        }

-        dojump(pc, GETARG_sBx(i));

-        break;

-      }

-      case OP_SETLIST:

-      case OP_SETLISTO: {

-        int bc;

-        int n;

-        Table *h;

-        runtime_check(L, ttistable(ra));

-        h = hvalue(ra);

-        bc = GETARG_Bx(i);

-        if (GET_OPCODE(i) == OP_SETLIST)

-          n = (bc&(LFIELDS_PER_FLUSH-1)) + 1;

-        else {

-          n = L->top - ra - 1;

-          L->top = L->ci->top;

-        }

-        bc &= ~(LFIELDS_PER_FLUSH-1);  /* bc = bc - bc%FPF */

-        for (; n > 0; n--)

-          setobj2t(luaH_setnum(L, h, bc+n), ra+n);  /* write barrier */

-        break;

-      }

-      case OP_CLOSE: {

-        luaF_close(L, ra);

-        break;

-      }

-      case OP_CLOSURE: {

-        Proto *p;

-        Closure *ncl;

-        int nup, j;

-        p = cl->p->p[GETARG_Bx(i)];

-        nup = p->nups;

-        ncl = luaF_newLclosure(L, nup, &cl->g);

-        ncl->l.p = p;

-        for (j=0; j<nup; j++, pc++) {

-          if (GET_OPCODE(*pc) == OP_GETUPVAL)

-            ncl->l.upvals[j] = cl->upvals[GETARG_B(*pc)];

-          else {

-            lua_assert(GET_OPCODE(*pc) == OP_MOVE);

-            ncl->l.upvals[j] = luaF_findupval(L, base + GETARG_B(*pc));

-          }

-        }

-        setclvalue(ra, ncl);

-        luaC_checkGC(L);

-        break;

-      }

-    }

-  }

-}

-

+/*
+** $Id: lvm.c,v 1.5 2004-11-27 21:46:07 pixel Exp $
+** Lua virtual machine
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* needed only when `lua_number2str' uses `sprintf' */
+#include <stdio.h>
+
+#define lvm_c
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lgc.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+#include "lvm.h"
+
+
+
+/* function to convert a lua_Number to a string */
+#ifndef lua_number2str
+#define lua_number2str(s,n)     sprintf((s), LUA_NUMBER_FMT, (n))
+#endif
+
+
+/* limit for table tag-method chains (to avoid loops) */
+#define MAXTAGLOOP	100
+
+
+const TObject *luaV_tonumber (const TObject *obj, TObject *n) {
+  lua_Number num;
+  if (ttisnumber(obj)) return obj;
+  if (ttisstring(obj) && luaO_str2d(svalue(obj), &num)) {
+    setnvalue(n, num);
+    return n;
+  }
+  else
+    return NULL;
+}
+
+
+int luaV_tostring (lua_State *L, StkId obj) {
+  if (!ttisnumber(obj))
+    return 0;
+  else {
+    char s[32];  /* 16 digits, sign, point and \0  (+ some extra...) */
+    lua_number2str(s, nvalue(obj));
+    setsvalue2s(obj, luaS_new(L, s));
+    return 1;
+  }
+}
+
+
+static void traceexec (lua_State *L) {
+  lu_byte mask = L->hookmask;
+  if (mask > LUA_MASKLINE) {  /* instruction-hook set? */
+    if (L->hookcount == 0) {
+      resethookcount(L);
+      luaD_callhook(L, LUA_HOOKCOUNT, -1);
+      return;
+    }
+  }
+  if (mask & LUA_MASKLINE) {
+    CallInfo *ci = L->ci;
+    Proto *p = ci_func(ci)->l.p;
+    int newline = getline(p, pcRel(*ci->u.l.pc, p));
+    if (!L->hookinit) {
+      luaG_inithooks(L);
+      return;
+    }
+    lua_assert(ci->state & CI_HASFRAME);
+    if (pcRel(*ci->u.l.pc, p) == 0)  /* tracing may be starting now? */
+      ci->u.l.savedpc = *ci->u.l.pc;  /* initialize `savedpc' */
+    /* calls linehook when enters a new line or jumps back (loop) */
+    if (*ci->u.l.pc <= ci->u.l.savedpc ||
+        newline != getline(p, pcRel(ci->u.l.savedpc, p))) {
+      luaD_callhook(L, LUA_HOOKLINE, newline);
+      ci = L->ci;  /* previous call may reallocate `ci' */
+    }
+    ci->u.l.savedpc = *ci->u.l.pc;
+  }
+}
+
+
+static void callTMres (lua_State *L, const TObject *f,
+                       const TObject *p1, const TObject *p2) {
+  setobj2s(L->top, f);  /* push function */
+  setobj2s(L->top+1, p1);  /* 1st argument */
+  setobj2s(L->top+2, p2);  /* 2nd argument */
+  luaD_checkstack(L, 3);  /* cannot check before (could invalidate p1, p2) */
+  L->top += 3;
+  luaD_call(L, L->top - 3, 1);
+  L->top--;  /* result will be in L->top */
+}
+
+
+
+static void callTM (lua_State *L, const TObject *f,
+                    const TObject *p1, const TObject *p2, const TObject *p3) {
+  setobj2s(L->top, f);  /* push function */
+  setobj2s(L->top+1, p1);  /* 1st argument */
+  setobj2s(L->top+2, p2);  /* 2nd argument */
+  setobj2s(L->top+3, p3);  /* 3th argument */
+  luaD_checkstack(L, 4);  /* cannot check before (could invalidate p1...p3) */
+  L->top += 4;
+  luaD_call(L, L->top - 4, 0);
+}
+
+
+static const TObject *luaV_index (lua_State *L, const TObject *t,
+                                  TObject *key, int loop) {
+  const TObject *tm = fasttm(L, hvalue(t)->metatable, TM_INDEX);
+  if (tm == NULL) return &luaO_nilobject;  /* no TM */
+  if (ttisfunction(tm)) {
+    callTMres(L, tm, t, key);
+    return L->top;
+  }
+  else return luaV_gettable(L, tm, key, loop);
+}
+
+static const TObject *luaV_getnotable (lua_State *L, const TObject *t,
+                                       TObject *key, int loop) {
+  const TObject *tm = luaT_gettmbyobj(L, t, TM_INDEX);
+  if (ttisnil(tm))
+    luaG_typeerror(L, t, "index");
+  if (ttisfunction(tm)) {
+    callTMres(L, tm, t, key);
+    return L->top;
+  }
+  else return luaV_gettable(L, tm, key, loop);
+}
+
+
+/*
+** Function to index a table.
+** Receives the table at `t' and the key at `key'.
+** leaves the result at `res'.
+*/
+const TObject *luaV_gettable (lua_State *L, const TObject *t, TObject *key,
+                              int loop) {
+  if (loop > MAXTAGLOOP)
+    luaG_runerror(L, "loop in gettable");
+  if (ttistable(t)) {  /* `t' is a table? */
+    Table *h = hvalue(t);
+    const TObject *v = luaH_get(h, key);  /* do a primitive get */
+    if (!ttisnil(v)) return v;
+    else return luaV_index(L, t, key, loop+1);
+  }
+  else return luaV_getnotable(L, t, key, loop+1);
+}
+
+
+/*
+** Receives table at `t', key at `key' and value at `val'.
+*/
+void luaV_settable (lua_State *L, const TObject *t, TObject *key, StkId val) {
+  const TObject *tm;
+  int loop = 0;
+  do {
+    if (ttistable(t)) {  /* `t' is a table? */
+      Table *h = hvalue(t);
+      TObject *oldval = luaH_set(L, h, key); /* do a primitive set */
+      if (!ttisnil(oldval) ||  /* result is no nil? */
+          (tm = fasttm(L, h->metatable, TM_NEWINDEX)) == NULL) { /* or no TM? */
+        setobj2t(oldval, val);  /* write barrier */
+        return;
+      }
+      /* else will try the tag method */
+    }
+    else if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_NEWINDEX)))
+      luaG_typeerror(L, t, "index");
+    if (ttisfunction(tm)) {
+      callTM(L, tm, t, key, val);
+      return;
+    }
+    t = tm;  /* else repeat with `tm' */ 
+  } while (++loop <= MAXTAGLOOP);
+  luaG_runerror(L, "loop in settable");
+}
+
+
+static int call_binTM (lua_State *L, const TObject *p1, const TObject *p2,
+                       StkId res, TMS event) {
+  ptrdiff_t result = savestack(L, res);
+  const TObject *tm = luaT_gettmbyobj(L, p1, event);  /* try first operand */
+  if (ttisnil(tm))
+    tm = luaT_gettmbyobj(L, p2, event);  /* try second operand */
+  if (!ttisfunction(tm)) return 0;
+  callTMres(L, tm, p1, p2);
+  res = restorestack(L, result);  /* previous call may change stack */
+  setobjs2s(res, L->top);
+  return 1;
+}
+
+
+static const TObject *get_compTM (lua_State *L, Table *mt1, Table *mt2,
+                                  TMS event) {
+  const TObject *tm1 = fasttm(L, mt1, event);
+  const TObject *tm2;
+  if (tm1 == NULL) return NULL;  /* no metamethod */
+  if (mt1 == mt2) return tm1;  /* same metatables => same metamethods */
+  tm2 = fasttm(L, mt2, event);
+  if (tm2 == NULL) return NULL;  /* no metamethod */
+  if (luaO_rawequalObj(tm1, tm2))  /* same metamethods? */
+    return tm1;
+  return NULL;
+}
+
+
+static int call_orderTM (lua_State *L, const TObject *p1, const TObject *p2,
+                         TMS event) {
+  const TObject *tm1 = luaT_gettmbyobj(L, p1, event);
+  const TObject *tm2;
+  if (ttisnil(tm1)) return -1;  /* no metamethod? */
+  tm2 = luaT_gettmbyobj(L, p2, event);
+  if (!luaO_rawequalObj(tm1, tm2))  /* different metamethods? */
+    return -1;
+  callTMres(L, tm1, p1, p2);
+  return !l_isfalse(L->top);
+}
+
+
+static int luaV_strcmp (const TString *ls, const TString *rs) {
+  const char *l = getstr(ls);
+  size_t ll = ls->tsv.len;
+  const char *r = getstr(rs);
+  size_t lr = rs->tsv.len;
+  for (;;) {
+    int temp = strcoll(l, r);
+    if (temp != 0) return temp;
+    else {  /* strings are equal up to a `\0' */
+      size_t len = strlen(l);  /* index of first `\0' in both strings */
+      if (len == lr)  /* r is finished? */
+        return (len == ll) ? 0 : 1;
+      else if (len == ll)  /* l is finished? */
+        return -1;  /* l is smaller than r (because r is not finished) */
+      /* both strings longer than `len'; go on comparing (after the `\0') */
+      len++;
+      l += len; ll -= len; r += len; lr -= len;
+    }
+  }
+}
+
+
+int luaV_lessthan (lua_State *L, const TObject *l, const TObject *r) {
+  int res;
+  if (ttype(l) != ttype(r))
+    return luaG_ordererror(L, l, r);
+  else if (ttisnumber(l))
+    return nvalue(l) < nvalue(r);
+  else if (ttisstring(l))
+    return luaV_strcmp(tsvalue(l), tsvalue(r)) < 0;
+  else if ((res = call_orderTM(L, l, r, TM_LT)) != -1)
+    return res;
+  return luaG_ordererror(L, l, r);
+}
+
+
+static int luaV_lessequal (lua_State *L, const TObject *l, const TObject *r) {
+  int res;
+  if (ttype(l) != ttype(r))
+    return luaG_ordererror(L, l, r);
+  else if (ttisnumber(l))
+    return nvalue(l) <= nvalue(r);
+  else if (ttisstring(l))
+    return luaV_strcmp(tsvalue(l), tsvalue(r)) <= 0;
+  else if ((res = call_orderTM(L, l, r, TM_LE)) != -1)  /* first try `le' */
+    return res;
+  else if ((res = call_orderTM(L, r, l, TM_LT)) != -1)  /* else try `lt' */
+    return !res;
+  return luaG_ordererror(L, l, r);
+}
+
+
+int luaV_equalval (lua_State *L, const TObject *t1, const TObject *t2) {
+  const TObject *tm;
+  lua_assert(ttype(t1) == ttype(t2));
+  switch (ttype(t1)) {
+    case LUA_TNIL: return 1;
+    case LUA_TNUMBER: return nvalue(t1) == nvalue(t2);
+    case LUA_TBOOLEAN: return bvalue(t1) == bvalue(t2);  /* true must be 1 !! */
+    case LUA_TLIGHTUSERDATA: return pvalue(t1) == pvalue(t2);
+    case LUA_TUSERDATA: {
+      if (uvalue(t1) == uvalue(t2)) return 1;
+      tm = get_compTM(L, uvalue(t1)->uv.metatable, uvalue(t2)->uv.metatable,
+                         TM_EQ);
+      break;  /* will try TM */
+    }
+    case LUA_TTABLE: {
+      if (hvalue(t1) == hvalue(t2)) return 1;
+      tm = get_compTM(L, hvalue(t1)->metatable, hvalue(t2)->metatable, TM_EQ);
+      break;  /* will try TM */
+    }
+    default: return gcvalue(t1) == gcvalue(t2);
+  }
+  if (tm == NULL) return 0;  /* no TM? */
+  callTMres(L, tm, t1, t2);  /* call TM */
+  return !l_isfalse(L->top);
+}
+
+
+void luaV_concat (lua_State *L, int total, int last) {
+  do {
+    StkId top = L->base + last + 1;
+    int n = 2;  /* number of elements handled in this pass (at least 2) */
+    if (!tostring(L, top-2) || !tostring(L, top-1)) {
+      if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT))
+        luaG_concaterror(L, top-2, top-1);
+    } else if (tsvalue(top-1)->tsv.len > 0) {  /* if len=0, do nothing */
+      /* at least two string values; get as many as possible */
+      lu_mem tl = cast(lu_mem, tsvalue(top-1)->tsv.len) +
+                  cast(lu_mem, tsvalue(top-2)->tsv.len);
+      char *buffer;
+      int i;
+      while (n < total && tostring(L, top-n-1)) {  /* collect total length */
+        tl += tsvalue(top-n-1)->tsv.len;
+        n++;
+      }
+      if (tl > MAX_SIZET) luaG_runerror(L, "string size overflow");
+      buffer = luaZ_openspace(L, &G(L)->buff, tl);
+      tl = 0;
+      for (i=n; i>0; i--) {  /* concat all strings */
+        size_t l = tsvalue(top-i)->tsv.len;
+        memcpy(buffer+tl, svalue(top-i), l);
+        tl += l;
+      }
+      setsvalue2s(top-n, luaS_newlstr(L, buffer, tl));
+    }
+    total -= n-1;  /* got `n' strings to create 1 new */
+    last -= n-1;
+  } while (total > 1);  /* repeat until only 1 result left */
+}
+
+
+static void Arith (lua_State *L, StkId ra,
+                   const TObject *rb, const TObject *rc, TMS op) {
+  TObject tempb, tempc;
+  const TObject *b, *c;
+  if ((b = luaV_tonumber(rb, &tempb)) != NULL &&
+      (c = luaV_tonumber(rc, &tempc)) != NULL) {
+    switch (op) {
+      case TM_ADD: setnvalue(ra, nvalue(b) + nvalue(c)); break;
+      case TM_SUB: setnvalue(ra, nvalue(b) - nvalue(c)); break;
+      case TM_MUL: setnvalue(ra, nvalue(b) * nvalue(c)); break;
+      case TM_DIV: setnvalue(ra, nvalue(b) / nvalue(c)); break;
+      case TM_POW: {
+        const TObject *f = luaH_getstr(hvalue(gt(L)), G(L)->tmname[TM_POW]);
+        ptrdiff_t res = savestack(L, ra);
+        if (!ttisfunction(f))
+          luaG_runerror(L, "`__pow' (`^' operator) is not a function");
+        callTMres(L, f, b, c);
+        ra = restorestack(L, res);  /* previous call may change stack */
+        setobjs2s(ra, L->top);
+        break;
+      }
+      default: lua_assert(0); break;
+    }
+  }
+  else if (!call_binTM(L, rb, rc, ra, op))
+    luaG_aritherror(L, rb, rc);
+}
+
+
+
+/*
+** some macros for common tasks in `luaV_execute'
+*/
+
+#define runtime_check(L, c)	{ if (!(c)) return 0; }
+
+#define RA(i)	(base+GETARG_A(i))
+/* to be used after possible stack reallocation */
+#define XRA(i)	(L->base+GETARG_A(i))
+#define RB(i)	(base+GETARG_B(i))
+#define RKB(i)	((GETARG_B(i) < MAXSTACK) ? RB(i) : k+GETARG_B(i)-MAXSTACK)
+#define RC(i)	(base+GETARG_C(i))
+#define RKC(i)	((GETARG_C(i) < MAXSTACK) ? RC(i) : k+GETARG_C(i)-MAXSTACK)
+#define KBx(i)	(k+GETARG_Bx(i))
+
+
+#define dojump(pc, i)	((pc) += (i))
+
+
+StkId luaV_execute (lua_State *L) {
+  LClosure *cl;
+  TObject *k;
+  const Instruction *pc;
+ callentry:  /* entry point when calling new functions */
+  L->ci->u.l.pc = &pc;
+  if (L->hookmask & LUA_MASKCALL)
+    luaD_callhook(L, LUA_HOOKCALL, -1);
+ retentry:  /* entry point when returning to old functions */
+  lua_assert(L->ci->state == CI_SAVEDPC ||
+             L->ci->state == (CI_SAVEDPC | CI_CALLING));
+  L->ci->state = CI_HASFRAME;  /* activate frame */
+  pc = L->ci->u.l.savedpc;
+  cl = &clvalue(L->base - 1)->l;
+  k = cl->p->k;
+  /* main loop of interpreter */
+  for (;;) {
+    const Instruction i = *pc++;
+    StkId base, ra;
+    if ((L->hookmask & (LUA_MASKLINE | LUA_MASKCOUNT)) &&
+        (--L->hookcount == 0 || L->hookmask & LUA_MASKLINE)) {
+      traceexec(L);
+      if (L->ci->state & CI_YIELD) {  /* did hook yield? */
+        L->ci->u.l.savedpc = pc - 1;
+        L->ci->state = CI_YIELD | CI_SAVEDPC;
+        return NULL;
+      }
+      if (L->ci->state & CI_BREAK) {  /* did hook break? */
+        luaG_runerror(L, "breaking");
+        L->ci->state &= ~CI_BREAK;
+      }
+    }
+    /* warning!! several calls may realloc the stack and invalidate `ra' */
+    base = L->base;
+    ra = RA(i);
+    lua_assert(L->ci->state & CI_HASFRAME);
+    lua_assert(base == L->ci->base);
+    lua_assert(L->top <= L->stack + L->stacksize && L->top >= base);
+    lua_assert(L->top == L->ci->top ||
+         GET_OPCODE(i) == OP_CALL ||   GET_OPCODE(i) == OP_TAILCALL ||
+         GET_OPCODE(i) == OP_RETURN || GET_OPCODE(i) == OP_SETLISTO);
+    switch (GET_OPCODE(i)) {
+      case OP_MOVE: {
+        setobjs2s(ra, RB(i));
+        break;
+      }
+      case OP_LOADK: {
+        setobj2s(ra, KBx(i));
+        break;
+      }
+      case OP_LOADBOOL: {
+        setbvalue(ra, GETARG_B(i));
+        if (GETARG_C(i)) pc++;  /* skip next instruction (if C) */
+        break;
+      }
+      case OP_LOADNIL: {
+        TObject *rb = RB(i);
+        do {
+          setnilvalue(rb--);
+        } while (rb >= ra);
+        break;
+      }
+      case OP_GETUPVAL: {
+        int b = GETARG_B(i);
+        setobj2s(ra, cl->upvals[b]->v);
+        break;
+      }
+      case OP_GETGLOBAL: {
+        TObject *rb = KBx(i);
+        const TObject *v;
+        lua_assert(ttisstring(rb) && ttistable(&cl->g));
+        v = luaH_getstr(hvalue(&cl->g), tsvalue(rb));
+        if (!ttisnil(v)) { setobj2s(ra, v); }
+        else
+          setobj2s(XRA(i), luaV_index(L, &cl->g, rb, 0));
+        break;
+      }
+      case OP_GETTABLE: {
+        StkId rb = RB(i);
+        TObject *rc = RKC(i);
+        if (ttistable(rb)) {
+          const TObject *v = luaH_get(hvalue(rb), rc);
+          if (!ttisnil(v)) { setobj2s(ra, v); }
+          else
+            setobj2s(XRA(i), luaV_index(L, rb, rc, 0));
+        }
+        else
+          setobj2s(XRA(i), luaV_getnotable(L, rb, rc, 0));
+        break;
+      }
+      case OP_SETGLOBAL: {
+        lua_assert(ttisstring(KBx(i)) && ttistable(&cl->g));
+        luaV_settable(L, &cl->g, KBx(i), ra);
+        break;
+      }
+      case OP_SETUPVAL: {
+        int b = GETARG_B(i);
+        setobj(cl->upvals[b]->v, ra);  /* write barrier */
+        break;
+      }
+      case OP_SETTABLE: {
+        luaV_settable(L, ra, RKB(i), RKC(i));
+        break;
+      }
+      case OP_NEWTABLE: {
+        int b = GETARG_B(i);
+        b = fb2int(b);
+        sethvalue(ra, luaH_new(L, b, GETARG_C(i)));
+        luaC_checkGC(L);
+        break;
+      }
+      case OP_SELF: {
+        StkId rb = RB(i);
+        TObject *rc = RKC(i);
+        runtime_check(L, ttisstring(rc));
+        setobjs2s(ra+1, rb);
+        if (ttistable(rb)) {
+          const TObject *v = luaH_getstr(hvalue(rb), tsvalue(rc));
+          if (!ttisnil(v)) { setobj2s(ra, v); }
+          else
+            setobj2s(XRA(i), luaV_index(L, rb, rc, 0));
+        }
+        else
+          setobj2s(XRA(i), luaV_getnotable(L, rb, rc, 0));
+        break;
+      }
+      case OP_ADD: {
+        TObject *rb = RKB(i);
+        TObject *rc = RKC(i);
+        if (ttisnumber(rb) && ttisnumber(rc)) {
+          setnvalue(ra, nvalue(rb) + nvalue(rc));
+        }
+        else
+          Arith(L, ra, rb, rc, TM_ADD);
+        break;
+      }
+      case OP_SUB: {
+        TObject *rb = RKB(i);
+        TObject *rc = RKC(i);
+        if (ttisnumber(rb) && ttisnumber(rc)) {
+          setnvalue(ra, nvalue(rb) - nvalue(rc));
+        }
+        else
+          Arith(L, ra, rb, rc, TM_SUB);
+        break;
+      }
+      case OP_MUL: {
+        TObject *rb = RKB(i);
+        TObject *rc = RKC(i);
+        if (ttisnumber(rb) && ttisnumber(rc)) {
+          setnvalue(ra, nvalue(rb) * nvalue(rc));
+        }
+        else
+          Arith(L, ra, rb, rc, TM_MUL);
+        break;
+      }
+      case OP_DIV: {
+        TObject *rb = RKB(i);
+        TObject *rc = RKC(i);
+        if (ttisnumber(rb) && ttisnumber(rc)) {
+          setnvalue(ra, nvalue(rb) / nvalue(rc));
+        }
+        else
+          Arith(L, ra, rb, rc, TM_DIV);
+        break;
+      }
+      case OP_POW: {
+        Arith(L, ra, RKB(i), RKC(i), TM_POW);
+        break;
+      }
+      case OP_UNM: {
+        const TObject *rb = RB(i);
+        TObject temp;
+        if (tonumber(rb, &temp)) {
+          setnvalue(ra, -nvalue(rb));
+        }
+        else {
+          setnilvalue(&temp);
+          if (!call_binTM(L, RB(i), &temp, ra, TM_UNM))
+            luaG_aritherror(L, RB(i), &temp);
+        }
+        break;
+      }
+      case OP_NOT: {
+        int res = l_isfalse(RB(i));  /* next assignment may change this value */
+        setbvalue(ra, res);
+        break;
+      }
+      case OP_CONCAT: {
+        int b = GETARG_B(i);
+        int c = GETARG_C(i);
+        luaV_concat(L, c-b+1, c);  /* may change `base' (and `ra') */
+        base = L->base;
+        setobjs2s(RA(i), base+b);
+        luaC_checkGC(L);
+        break;
+      }
+      case OP_JMP: {
+        dojump(pc, GETARG_sBx(i));
+        break;
+      }
+      case OP_EQ: {
+        if (equalobj(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++;
+        else dojump(pc, GETARG_sBx(*pc) + 1);
+        break;
+      }
+      case OP_LT: {
+        if (luaV_lessthan(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++;
+        else dojump(pc, GETARG_sBx(*pc) + 1);
+        break;
+      }
+      case OP_LE: {
+        if (luaV_lessequal(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++;
+        else dojump(pc, GETARG_sBx(*pc) + 1);
+        break;
+      }
+      case OP_TEST: {
+        TObject *rb = RB(i);
+        if (l_isfalse(rb) == GETARG_C(i)) pc++;
+        else {
+          setobjs2s(ra, rb);
+          dojump(pc, GETARG_sBx(*pc) + 1);
+        }
+        break;
+      }
+      case OP_CALL:
+      case OP_TAILCALL: {
+        StkId firstResult;
+        int b = GETARG_B(i);
+        int nresults;
+        if (b != 0) L->top = ra+b;  /* else previous instruction set top */
+        nresults = GETARG_C(i) - 1;
+        firstResult = luaD_precall(L, ra);
+        if (firstResult) {
+          if (firstResult > L->top) {  /* yield? */
+            lua_assert(L->ci->state == (CI_C | CI_YIELD));
+            (L->ci - 1)->u.l.savedpc = pc;
+            (L->ci - 1)->state = CI_SAVEDPC;
+            return NULL;
+          }
+          /* it was a C function (`precall' called it); adjust results */
+          luaD_poscall(L, nresults, firstResult);
+          if (nresults >= 0) L->top = L->ci->top;
+        }
+        else {  /* it is a Lua function */
+          if (GET_OPCODE(i) == OP_CALL) {  /* regular call? */
+            (L->ci-1)->u.l.savedpc = pc;  /* save `pc' to return later */
+            (L->ci-1)->state = (CI_SAVEDPC | CI_CALLING);
+          }
+          else {  /* tail call: put new frame in place of previous one */
+            int aux;
+            base = (L->ci - 1)->base;  /* `luaD_precall' may change the stack */
+            ra = RA(i);
+            if (L->openupval) luaF_close(L, base);
+            for (aux = 0; ra+aux < L->top; aux++)  /* move frame down */
+              setobjs2s(base+aux-1, ra+aux);
+            (L->ci - 1)->top = L->top = base+aux;  /* correct top */
+            lua_assert(L->ci->state & CI_SAVEDPC);
+            (L->ci - 1)->u.l.savedpc = L->ci->u.l.savedpc;
+            (L->ci - 1)->u.l.tailcalls++;  /* one more call lost */
+            (L->ci - 1)->state = CI_SAVEDPC;
+            L->ci--;  /* remove new frame */
+            L->base = L->ci->base;
+          }
+          goto callentry;
+        }
+        break;
+      }
+      case OP_RETURN: {
+        CallInfo *ci = L->ci - 1;  /* previous function frame */
+        int b = GETARG_B(i);
+        if (b != 0) L->top = ra+b-1;
+        lua_assert(L->ci->state & CI_HASFRAME);
+        if (L->openupval) luaF_close(L, base);
+        L->ci->state = CI_SAVEDPC;  /* deactivate current function */
+        L->ci->u.l.savedpc = pc;
+        /* previous function was running `here'? */
+        if (!(ci->state & CI_CALLING)) {
+          lua_assert((ci->state & CI_C) || ci->u.l.pc != &pc);
+          return ra;  /* no: return */
+        }
+        else {  /* yes: continue its execution */
+          int nresults;
+          lua_assert(ci->u.l.pc == &pc &&
+                     ttisfunction(ci->base - 1) &&
+                     (ci->state & CI_SAVEDPC));
+          lua_assert(GET_OPCODE(*(ci->u.l.savedpc - 1)) == OP_CALL);
+          nresults = GETARG_C(*(ci->u.l.savedpc - 1)) - 1;
+          luaD_poscall(L, nresults, ra);
+          if (nresults >= 0) L->top = L->ci->top;
+          goto retentry;
+        }
+      }
+      case OP_FORLOOP: {
+        lua_Number step, idx, limit;
+        const TObject *plimit = ra+1;
+        const TObject *pstep = ra+2;
+        if (!ttisnumber(ra))
+          luaG_runerror(L, "`for' initial value must be a number");
+        if (!tonumber(plimit, ra+1))
+          luaG_runerror(L, "`for' limit must be a number");
+        if (!tonumber(pstep, ra+2))
+          luaG_runerror(L, "`for' step must be a number");
+        step = nvalue(pstep);
+        idx = nvalue(ra) + step;  /* increment index */
+        limit = nvalue(plimit);
+        if (step > 0 ? idx <= limit : idx >= limit) {
+          dojump(pc, GETARG_sBx(i));  /* jump back */
+          chgnvalue(ra, idx);  /* update index */
+        }
+        break;
+      }
+      case OP_TFORLOOP: {
+        int nvar = GETARG_C(i) + 1;
+        StkId cb = ra + nvar + 2;  /* call base */
+        setobjs2s(cb, ra);
+        setobjs2s(cb+1, ra+1);
+        setobjs2s(cb+2, ra+2);
+        L->top = cb+3;  /* func. + 2 args (state and index) */
+        luaD_call(L, cb, nvar);
+        L->top = L->ci->top;
+        ra = XRA(i) + 2;  /* final position of first result */
+        cb = ra + nvar;
+        do {  /* move results to proper positions */
+          nvar--;
+          setobjs2s(ra+nvar, cb+nvar);
+        } while (nvar > 0);
+        if (ttisnil(ra))  /* break loop? */
+          pc++;  /* skip jump (break loop) */
+        else
+          dojump(pc, GETARG_sBx(*pc) + 1);  /* jump back */
+        break;
+      }
+      case OP_TFORPREP: {  /* for compatibility only */
+        if (ttistable(ra)) {
+          setobjs2s(ra+1, ra);
+          setobj2s(ra, luaH_getstr(hvalue(gt(L)), luaS_new(L, "next")));
+        }
+        dojump(pc, GETARG_sBx(i));
+        break;
+      }
+      case OP_SETLIST:
+      case OP_SETLISTO: {
+        int bc;
+        int n;
+        Table *h;
+        runtime_check(L, ttistable(ra));
+        h = hvalue(ra);
+        bc = GETARG_Bx(i);
+        if (GET_OPCODE(i) == OP_SETLIST)
+          n = (bc&(LFIELDS_PER_FLUSH-1)) + 1;
+        else {
+          n = L->top - ra - 1;
+          L->top = L->ci->top;
+        }
+        bc &= ~(LFIELDS_PER_FLUSH-1);  /* bc = bc - bc%FPF */
+        for (; n > 0; n--)
+          setobj2t(luaH_setnum(L, h, bc+n), ra+n);  /* write barrier */
+        break;
+      }
+      case OP_CLOSE: {
+        luaF_close(L, ra);
+        break;
+      }
+      case OP_CLOSURE: {
+        Proto *p;
+        Closure *ncl;
+        int nup, j;
+        p = cl->p->p[GETARG_Bx(i)];
+        nup = p->nups;
+        ncl = luaF_newLclosure(L, nup, &cl->g);
+        ncl->l.p = p;
+        for (j=0; j<nup; j++, pc++) {
+          if (GET_OPCODE(*pc) == OP_GETUPVAL)
+            ncl->l.upvals[j] = cl->upvals[GETARG_B(*pc)];
+          else {
+            lua_assert(GET_OPCODE(*pc) == OP_MOVE);
+            ncl->l.upvals[j] = luaF_findupval(L, base + GETARG_B(*pc));
+          }
+        }
+        setclvalue(ra, ncl);
+        luaC_checkGC(L);
+        break;
+      }
+    }
+  }
+}
+
diff --git a/lib/lua/src/lzio.c b/lib/lua/src/lzio.c
index e3aefa0..277a656 100644
--- a/lib/lua/src/lzio.c
+++ b/lib/lua/src/lzio.c
@@ -1,81 +1,81 @@
-/*

-** $Id: lzio.c,v 1.3 2004-11-27 21:35:20 pixel Exp $

-** a generic input stream interface

-** See Copyright Notice in lua.h

-*/

-

-

-#include <string.h>

-

-#define lzio_c

-

-#include "lua.h"

-

-#include "llimits.h"

-#include "lmem.h"

-#include "lzio.h"

-

-

-int luaZ_fill (ZIO *z) {

-  size_t size;

-  const char *buff = z->reader(NULL, z->data, &size);

-  if (buff == NULL || size == 0) return EOZ;

-  z->n = size - 1;

-  z->p = buff;

-  return char2int(*(z->p++));

-}

-

-

-int luaZ_lookahead (ZIO *z) {

-  if (z->n == 0) {

-    int c = luaZ_fill(z);

-    if (c == EOZ) return c;

-    z->n++;

-    z->p--;

-  }

-  return char2int(*z->p);

-}

-

-

-void luaZ_init (ZIO *z, lua_Chunkreader reader, void *data, const char *name) {

-  z->reader = reader;

-  z->data = data;

-  z->name = name;

-  z->n = 0;

-  z->p = NULL;

-}

-

-

-/* --------------------------------------------------------------- read --- */

-size_t luaZ_read (ZIO *z, void *b, size_t n) {

-  while (n) {

-    size_t m;

-    if (z->n == 0) {

-      if (luaZ_fill(z) == EOZ)

-        return n;  /* return number of missing bytes */

-      else {

-        ++z->n;  /* filbuf removed first byte; put back it */

-        --z->p;

-      }

-    }

-    m = (n <= z->n) ? n : z->n;  /* min. between n and z->n */

-    memcpy(b, z->p, m);

-    z->n -= m;

-    z->p += m;

-    b = (char *)b + m;

-    n -= m;

-  }

-  return 0;

-}

-

-/* ------------------------------------------------------------------------ */

-char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n) {

-  if (n > buff->buffsize) {

-    if (n < LUA_MINBUFFER) n = LUA_MINBUFFER;

-    luaM_reallocvector(L, buff->buffer, buff->buffsize, n, char);

-    buff->buffsize = n;

-  }

-  return buff->buffer;

-}

-

-

+/*
+** $Id: lzio.c,v 1.4 2004-11-27 21:46:07 pixel Exp $
+** a generic input stream interface
+** See Copyright Notice in lua.h
+*/
+
+
+#include <string.h>
+
+#define lzio_c
+
+#include "lua.h"
+
+#include "llimits.h"
+#include "lmem.h"
+#include "lzio.h"
+
+
+int luaZ_fill (ZIO *z) {
+  size_t size;
+  const char *buff = z->reader(NULL, z->data, &size);
+  if (buff == NULL || size == 0) return EOZ;
+  z->n = size - 1;
+  z->p = buff;
+  return char2int(*(z->p++));
+}
+
+
+int luaZ_lookahead (ZIO *z) {
+  if (z->n == 0) {
+    int c = luaZ_fill(z);
+    if (c == EOZ) return c;
+    z->n++;
+    z->p--;
+  }
+  return char2int(*z->p);
+}
+
+
+void luaZ_init (ZIO *z, lua_Chunkreader reader, void *data, const char *name) {
+  z->reader = reader;
+  z->data = data;
+  z->name = name;
+  z->n = 0;
+  z->p = NULL;
+}
+
+
+/* --------------------------------------------------------------- read --- */
+size_t luaZ_read (ZIO *z, void *b, size_t n) {
+  while (n) {
+    size_t m;
+    if (z->n == 0) {
+      if (luaZ_fill(z) == EOZ)
+        return n;  /* return number of missing bytes */
+      else {
+        ++z->n;  /* filbuf removed first byte; put back it */
+        --z->p;
+      }
+    }
+    m = (n <= z->n) ? n : z->n;  /* min. between n and z->n */
+    memcpy(b, z->p, m);
+    z->n -= m;
+    z->p += m;
+    b = (char *)b + m;
+    n -= m;
+  }
+  return 0;
+}
+
+/* ------------------------------------------------------------------------ */
+char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n) {
+  if (n > buff->buffsize) {
+    if (n < LUA_MINBUFFER) n = LUA_MINBUFFER;
+    luaM_reallocvector(L, buff->buffer, buff->buffsize, n, char);
+    buff->buffsize = n;
+  }
+  return buff->buffer;
+}
+
+