Large dos2unix commit...

9 files changed, 3799 insertions, 3804 deletions

diff --git a/lib/lua/src/LuaLib/lauxlib.c b/lib/lua/src/LuaLib/lauxlib.c
index 85b64ce..c4b24a7 100644
--- a/lib/lua/src/LuaLib/lauxlib.c
+++ b/lib/lua/src/LuaLib/lauxlib.c
@@ -1,591 +1,591 @@
-/*
-** $Id: lauxlib.c,v 1.2 2003-12-11 16:53:32 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 1.3 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);

+}

+

+/* }====================================================== */

diff --git a/lib/lua/src/LuaLib/lbaselib.c b/lib/lua/src/LuaLib/lbaselib.c
index 5a3245a..6c928b5 100644
--- a/lib/lua/src/LuaLib/lbaselib.c
+++ b/lib/lua/src/LuaLib/lbaselib.c
@@ -1,674 +1,674 @@
-/*
-** $Id: lbaselib.c,v 1.2 2003-12-11 16:53:32 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 1.3 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;

+}

+

diff --git a/lib/lua/src/LuaLib/ldblib.c b/lib/lua/src/LuaLib/ldblib.c
index fcc35e4..455b89f 100644
--- a/lib/lua/src/LuaLib/ldblib.c
+++ b/lib/lua/src/LuaLib/ldblib.c
@@ -1,299 +1,299 @@
-/*
-** $Id: ldblib.c,v 1.2 2003-12-11 16:53:32 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 1.3 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;

+}

+

diff --git a/lib/lua/src/LuaLib/ldirlib.c b/lib/lua/src/LuaLib/ldirlib.c
index b6760da..4e221b4 100644
--- a/lib/lua/src/LuaLib/ldirlib.c
+++ b/lib/lua/src/LuaLib/ldirlib.c
@@ -1,19 +1,14 @@
-#include <stdlib.h>
+#include <stdlib.h>

 #include <dirent.h>

-#include <errno.h>
-#ifdef _WIN32
-#include <sys/stat.h>
-#else
-#include <sys/stat.h>
-#include <sys/type.h>
-#endif
-
-#define ldirlib_c
-
-#include "lua.h"
-
-#include "lauxlib.h"
-#include "lualib.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);

@@ -73,13 +68,13 @@ static int dir_gc (lua_State *L) {
     if (d) closedir(d);

     return 0;

 }

-
-static const luaL_reg dirlib[] = {
-  {NULL, NULL}
+

+static const luaL_reg dirlib[] = {

+  {NULL, NULL}

 };

 

 int luaopen_dir (lua_State *L) {

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

     luaL_newmetatable(L, "LuaBook.dir");

 

     /* set its __gc field */

diff --git a/lib/lua/src/LuaLib/liolib.c b/lib/lua/src/LuaLib/liolib.c
index 100b3b7..3eeb05f 100644
--- a/lib/lua/src/LuaLib/liolib.c
+++ b/lib/lua/src/LuaLib/liolib.c
@@ -1,750 +1,750 @@
-/*
-** $Id: liolib.c,v 1.2 2003-12-11 16:53:32 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 1.3 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;

+}

+

diff --git a/lib/lua/src/LuaLib/lmathlib.c b/lib/lua/src/LuaLib/lmathlib.c
index b0f4ac7..2352fca 100644
--- a/lib/lua/src/LuaLib/lmathlib.c
+++ b/lib/lua/src/LuaLib/lmathlib.c
@@ -1,246 +1,246 @@
-/*
-** $Id: lmathlib.c,v 1.2 2003-12-11 16:53:32 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 1.3 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;

+}

+

diff --git a/lib/lua/src/LuaLib/loadlib.c b/lib/lua/src/LuaLib/loadlib.c
index b13c690..dc83283 100644
--- a/lib/lua/src/LuaLib/loadlib.c
+++ b/lib/lua/src/LuaLib/loadlib.c
@@ -1,205 +1,205 @@
-/*
-** $Id: loadlib.c,v 1.2 2003-12-11 16:53:32 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 1.3 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/

+*

+*/

diff --git a/lib/lua/src/LuaLib/lstrlib.c b/lib/lua/src/LuaLib/lstrlib.c
index 1bffbfb..9b5fe8a 100644
--- a/lib/lua/src/LuaLib/lstrlib.c
+++ b/lib/lua/src/LuaLib/lstrlib.c
@@ -1,770 +1,770 @@
-/*
-** $Id: lstrlib.c,v 1.2 2003-12-11 16:53:32 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 1.3 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;

+}

+

diff --git a/lib/lua/src/LuaLib/ltablib.c b/lib/lua/src/LuaLib/ltablib.c
index 165f8b1..fc6c380 100644
--- a/lib/lua/src/LuaLib/ltablib.c
+++ b/lib/lua/src/LuaLib/ltablib.c
@@ -1,250 +1,250 @@
-/*
-** $Id: ltablib.c,v 1.2 2003-12-11 16:53:32 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 1.3 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;

+}

+