diff options
Diffstat (limited to 'lib/lua')
30 files changed, 12431 insertions, 12436 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;
+}
+
diff --git a/lib/lua/src/lapi.c b/lib/lua/src/lapi.c index 0473cab..48646b9 100644 --- a/lib/lua/src/lapi.c +++ b/lib/lua/src/lapi.c @@ -1,922 +1,922 @@ -/* -** $Id: lapi.c,v 1.2 2003-12-11 16:53:30 pixel Exp $ -** Lua API -** See Copyright Notice in lua.h -*/ - - -#include <assert.h> -#include <string.h> - -#define lapi_c - -#include "lua.h" - -#include "lapi.h" -#include "ldebug.h" -#include "ldo.h" -#include "lfunc.h" -#include "lgc.h" -#include "lmem.h" -#include "lobject.h" -#include "lstate.h" -#include "lstring.h" -#include "ltable.h" -#include "ltm.h" -#include "lundump.h" -#include "lvm.h" - - -const char lua_ident[] = - "$Lua: " LUA_VERSION " " LUA_COPYRIGHT " $\n" - "$Authors: " LUA_AUTHORS " $\n" - "$URL: www.lua.org $\n"; - - - -#ifndef api_check -#define api_check(L, o) /*{ assert(o); }*/ -#endif - -#define api_checknelems(L, n) api_check(L, (n) <= (L->top - L->base)) - -#define api_incr_top(L) {api_check(L, L->top < L->ci->top); L->top++;} - - - - -static TObject *negindex (lua_State *L, int idx) { - if (idx > LUA_REGISTRYINDEX) { - api_check(L, idx != 0 && -idx <= L->top - L->base); - return L->top+idx; - } - else switch (idx) { /* pseudo-indices */ - case LUA_REGISTRYINDEX: return registry(L); - case LUA_GLOBALSINDEX: return gt(L); - default: { - TObject *func = (L->base - 1); - idx = LUA_GLOBALSINDEX - idx; - lua_assert(iscfunction(func)); - return (idx <= clvalue(func)->c.nupvalues) - ? &clvalue(func)->c.upvalue[idx-1] - : NULL; - } - } -} - - -static TObject *luaA_index (lua_State *L, int idx) { - if (idx > 0) { - api_check(L, idx <= L->top - L->base); - return L->base + idx - 1; - } - else { - TObject *o = negindex(L, idx); - api_check(L, o != NULL); - return o; - } -} - - -static TObject *luaA_indexAcceptable (lua_State *L, int idx) { - if (idx > 0) { - TObject *o = L->base+(idx-1); - api_check(L, idx <= L->stack_last - L->base); - if (o >= L->top) return NULL; - else return o; - } - else - return negindex(L, idx); -} - - -void luaA_pushobject (lua_State *L, const TObject *o) { - setobj2s(L->top, o); - incr_top(L); -} - - -LUA_API int lua_checkstack (lua_State *L, int size) { - int res; - lua_lock(L); - if ((L->top - L->base + size) > LUA_MAXCSTACK) - res = 0; /* stack overflow */ - else { - luaD_checkstack(L, size); - if (L->ci->top < L->top + size) - L->ci->top = L->top + size; - res = 1; - } - lua_unlock(L); - return res; -} - - -LUA_API void lua_xmove (lua_State *from, lua_State *to, int n) { - int i; - lua_lock(to); - api_checknelems(from, n); - from->top -= n; - for (i = 0; i < n; i++) { - setobj2s(to->top, from->top + i); - api_incr_top(to); - } - lua_unlock(to); -} - - -LUA_API lua_CFunction lua_atpanic (lua_State *L, lua_CFunction panicf) { - lua_CFunction old; - lua_lock(L); - old = G(L)->panic; - G(L)->panic = panicf; - lua_unlock(L); - return old; -} - - -LUA_API lua_State *lua_newthread (lua_State *L) { - lua_State *L1; - lua_lock(L); - luaC_checkGC(L); - L1 = luaE_newthread(L); - setthvalue(L->top, L1); - api_incr_top(L); - lua_unlock(L); - lua_userstateopen(L1); - return L1; -} - - - -/* -** basic stack manipulation -*/ - - -LUA_API int lua_gettop (lua_State *L) { - return (L->top - L->base); -} - - -LUA_API void lua_settop (lua_State *L, int idx) { - lua_lock(L); - if (idx >= 0) { - api_check(L, idx <= L->stack_last - L->base); - while (L->top < L->base + idx) - setnilvalue(L->top++); - L->top = L->base + idx; - } - else { - api_check(L, -(idx+1) <= (L->top - L->base)); - L->top += idx+1; /* `subtract' index (index is negative) */ - } - lua_unlock(L); -} - - -LUA_API void lua_remove (lua_State *L, int idx) { - StkId p; - lua_lock(L); - p = luaA_index(L, idx); - while (++p < L->top) setobjs2s(p-1, p); - L->top--; - lua_unlock(L); -} - - -LUA_API void lua_insert (lua_State *L, int idx) { - StkId p; - StkId q; - lua_lock(L); - p = luaA_index(L, idx); - for (q = L->top; q>p; q--) setobjs2s(q, q-1); - setobjs2s(p, L->top); - lua_unlock(L); -} - - -LUA_API void lua_replace (lua_State *L, int idx) { - lua_lock(L); - api_checknelems(L, 1); - setobj(luaA_index(L, idx), L->top - 1); /* write barrier */ - L->top--; - lua_unlock(L); -} - - -LUA_API void lua_pushvalue (lua_State *L, int idx) { - lua_lock(L); - setobj2s(L->top, luaA_index(L, idx)); - api_incr_top(L); - lua_unlock(L); -} - - - -/* -** access functions (stack -> C) -*/ - - -LUA_API int lua_type (lua_State *L, int idx) { - StkId o = luaA_indexAcceptable(L, idx); - return (o == NULL) ? LUA_TNONE : ttype(o); -} - - -LUA_API const char *lua_typename (lua_State *L, int t) { - UNUSED(L); - return (t == LUA_TNONE) ? "no value" : luaT_typenames[t]; -} - - -LUA_API int lua_iscfunction (lua_State *L, int idx) { - StkId o = luaA_indexAcceptable(L, idx); - return (o == NULL) ? 0 : iscfunction(o); -} - - -LUA_API int lua_isnumber (lua_State *L, int idx) { - TObject n; - const TObject *o = luaA_indexAcceptable(L, idx); - return (o != NULL && tonumber(o, &n)); -} - - -LUA_API int lua_isstring (lua_State *L, int idx) { - int t = lua_type(L, idx); - return (t == LUA_TSTRING || t == LUA_TNUMBER); -} - - -LUA_API int lua_isuserdata (lua_State *L, int idx) { - const TObject *o = luaA_indexAcceptable(L, idx); - return (o != NULL && (ttisuserdata(o) || ttislightuserdata(o))); -} - - -LUA_API int lua_rawequal (lua_State *L, int index1, int index2) { - StkId o1 = luaA_indexAcceptable(L, index1); - StkId o2 = luaA_indexAcceptable(L, index2); - return (o1 == NULL || o2 == NULL) ? 0 /* index out of range */ - : luaO_rawequalObj(o1, o2); -} - - -LUA_API int lua_equal (lua_State *L, int index1, int index2) { - StkId o1, o2; - int i; - lua_lock(L); /* may call tag method */ - o1 = luaA_indexAcceptable(L, index1); - o2 = luaA_indexAcceptable(L, index2); - i = (o1 == NULL || o2 == NULL) ? 0 /* index out of range */ - : equalobj(L, o1, o2); - lua_unlock(L); - return i; -} - - -LUA_API int lua_lessthan (lua_State *L, int index1, int index2) { - StkId o1, o2; - int i; - lua_lock(L); /* may call tag method */ - o1 = luaA_indexAcceptable(L, index1); - o2 = luaA_indexAcceptable(L, index2); - i = (o1 == NULL || o2 == NULL) ? 0 /* index out-of-range */ - : luaV_lessthan(L, o1, o2); - lua_unlock(L); - return i; -} - - - -LUA_API lua_Number lua_tonumber (lua_State *L, int idx) { - TObject n; - const TObject *o = luaA_indexAcceptable(L, idx); - if (o != NULL && tonumber(o, &n)) - return nvalue(o); - else - return 0; -} - - -LUA_API int lua_toboolean (lua_State *L, int idx) { - const TObject *o = luaA_indexAcceptable(L, idx); - return (o != NULL) && !l_isfalse(o); -} - - -LUA_API const char *lua_tostring (lua_State *L, int idx) { - StkId o = luaA_indexAcceptable(L, idx); - if (o == NULL) - return NULL; - else if (ttisstring(o)) - return svalue(o); - else { - const char *s; - lua_lock(L); /* `luaV_tostring' may create a new string */ - s = (luaV_tostring(L, o) ? svalue(o) : NULL); - luaC_checkGC(L); - lua_unlock(L); - return s; - } -} - - -LUA_API size_t lua_strlen (lua_State *L, int idx) { - StkId o = luaA_indexAcceptable(L, idx); - if (o == NULL) - return 0; - else if (ttisstring(o)) - return tsvalue(o)->tsv.len; - else { - size_t l; - lua_lock(L); /* `luaV_tostring' may create a new string */ - l = (luaV_tostring(L, o) ? tsvalue(o)->tsv.len : 0); - lua_unlock(L); - return l; - } -} - - -LUA_API lua_CFunction lua_tocfunction (lua_State *L, int idx) { - StkId o = luaA_indexAcceptable(L, idx); - return (o == NULL || !iscfunction(o)) ? NULL : clvalue(o)->c.f; -} - - -LUA_API void *lua_touserdata (lua_State *L, int idx) { - StkId o = luaA_indexAcceptable(L, idx); - if (o == NULL) return NULL; - switch (ttype(o)) { - case LUA_TUSERDATA: return (uvalue(o) + 1); - case LUA_TLIGHTUSERDATA: return pvalue(o); - default: return NULL; - } -} - - -LUA_API lua_State *lua_tothread (lua_State *L, int idx) { - StkId o = luaA_indexAcceptable(L, idx); - return (o == NULL || !ttisthread(o)) ? NULL : thvalue(o); -} - - -LUA_API const void *lua_topointer (lua_State *L, int idx) { - StkId o = luaA_indexAcceptable(L, idx); - if (o == NULL) return NULL; - else { - switch (ttype(o)) { - case LUA_TTABLE: return hvalue(o); - case LUA_TFUNCTION: return clvalue(o); - case LUA_TTHREAD: return thvalue(o); - case LUA_TUSERDATA: - case LUA_TLIGHTUSERDATA: - return lua_touserdata(L, idx); - default: return NULL; - } - } -} - - - -/* -** push functions (C -> stack) -*/ - - -LUA_API void lua_pushnil (lua_State *L) { - lua_lock(L); - setnilvalue(L->top); - api_incr_top(L); - lua_unlock(L); -} - - -LUA_API void lua_pushnumber (lua_State *L, lua_Number n) { - lua_lock(L); - setnvalue(L->top, n); - api_incr_top(L); - lua_unlock(L); -} - - -LUA_API void lua_pushlstring (lua_State *L, const char *s, size_t len) { - lua_lock(L); - luaC_checkGC(L); - setsvalue2s(L->top, luaS_newlstr(L, s, len)); - api_incr_top(L); - lua_unlock(L); -} - - -LUA_API void lua_pushstring (lua_State *L, const char *s) { - if (s == NULL) - lua_pushnil(L); - else - lua_pushlstring(L, s, strlen(s)); -} - - -LUA_API const char *lua_pushvfstring (lua_State *L, const char *fmt, - va_list argp) { - const char *ret; - lua_lock(L); - luaC_checkGC(L); - ret = luaO_pushvfstring(L, fmt, argp); - lua_unlock(L); - return ret; -} - - -LUA_API const char *lua_pushfstring (lua_State *L, const char *fmt, ...) { - const char *ret; - va_list argp; - lua_lock(L); - luaC_checkGC(L); - va_start(argp, fmt); - ret = luaO_pushvfstring(L, fmt, argp); - va_end(argp); - lua_unlock(L); - return ret; -} - - -LUA_API void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n) { - Closure *cl; - lua_lock(L); - luaC_checkGC(L); - api_checknelems(L, n); - cl = luaF_newCclosure(L, n); - cl->c.f = fn; - L->top -= n; - while (n--) - setobj2n(&cl->c.upvalue[n], L->top+n); - setclvalue(L->top, cl); - api_incr_top(L); - lua_unlock(L); -} - - -LUA_API void lua_pushboolean (lua_State *L, int b) { - lua_lock(L); - setbvalue(L->top, (b != 0)); /* ensure that true is 1 */ - api_incr_top(L); - lua_unlock(L); -} - - -LUA_API void lua_pushlightuserdata (lua_State *L, void *p) { - lua_lock(L); - setpvalue(L->top, p); - api_incr_top(L); - lua_unlock(L); -} - - - -/* -** get functions (Lua -> stack) -*/ - - -LUA_API void lua_gettable (lua_State *L, int idx) { - StkId t; - lua_lock(L); - t = luaA_index(L, idx); - setobj2s(L->top - 1, luaV_gettable(L, t, L->top - 1, 0)); - lua_unlock(L); -} - - -LUA_API void lua_rawget (lua_State *L, int idx) { - StkId t; - lua_lock(L); - t = luaA_index(L, idx); - api_check(L, ttistable(t)); - setobj2s(L->top - 1, luaH_get(hvalue(t), L->top - 1)); - lua_unlock(L); -} - - -LUA_API void lua_rawgeti (lua_State *L, int idx, int n) { - StkId o; - lua_lock(L); - o = luaA_index(L, idx); - api_check(L, ttistable(o)); - setobj2s(L->top, luaH_getnum(hvalue(o), n)); - api_incr_top(L); - lua_unlock(L); -} - - -LUA_API void lua_newtable (lua_State *L) { - lua_lock(L); - luaC_checkGC(L); - sethvalue(L->top, luaH_new(L, 0, 0)); - api_incr_top(L); - lua_unlock(L); -} - - -LUA_API int lua_getmetatable (lua_State *L, int objindex) { - const TObject *obj; - Table *mt = NULL; - int res; - lua_lock(L); - obj = luaA_indexAcceptable(L, objindex); - if (obj != NULL) { - switch (ttype(obj)) { - case LUA_TTABLE: - mt = hvalue(obj)->metatable; - break; - case LUA_TUSERDATA: - mt = uvalue(obj)->uv.metatable; - break; - } - } - if (mt == NULL || mt == hvalue(defaultmeta(L))) - res = 0; - else { - sethvalue(L->top, mt); - api_incr_top(L); - res = 1; - } - lua_unlock(L); - return res; -} - - -LUA_API void lua_getfenv (lua_State *L, int idx) { - StkId o; - lua_lock(L); - o = luaA_index(L, idx); - setobj2s(L->top, isLfunction(o) ? &clvalue(o)->l.g : gt(L)); - api_incr_top(L); - lua_unlock(L); -} - - -/* -** set functions (stack -> Lua) -*/ - - -LUA_API void lua_settable (lua_State *L, int idx) { - StkId t; - lua_lock(L); - api_checknelems(L, 2); - t = luaA_index(L, idx); - luaV_settable(L, t, L->top - 2, L->top - 1); - L->top -= 2; /* pop index and value */ - lua_unlock(L); -} - - -LUA_API void lua_rawset (lua_State *L, int idx) { - StkId t; - lua_lock(L); - api_checknelems(L, 2); - t = luaA_index(L, idx); - api_check(L, ttistable(t)); - setobj2t(luaH_set(L, hvalue(t), L->top-2), L->top-1); /* write barrier */ - L->top -= 2; - lua_unlock(L); -} - - -LUA_API void lua_rawseti (lua_State *L, int idx, int n) { - StkId o; - lua_lock(L); - api_checknelems(L, 1); - o = luaA_index(L, idx); - api_check(L, ttistable(o)); - setobj2t(luaH_setnum(L, hvalue(o), n), L->top-1); /* write barrier */ - L->top--; - lua_unlock(L); -} - - -LUA_API int lua_setmetatable (lua_State *L, int objindex) { - TObject *obj, *mt; - int res = 1; - lua_lock(L); - api_checknelems(L, 1); - obj = luaA_index(L, objindex); - mt = (!ttisnil(L->top - 1)) ? L->top - 1 : defaultmeta(L); - api_check(L, ttistable(mt)); - switch (ttype(obj)) { - case LUA_TTABLE: { - hvalue(obj)->metatable = hvalue(mt); /* write barrier */ - break; - } - case LUA_TUSERDATA: { - uvalue(obj)->uv.metatable = hvalue(mt); /* write barrier */ - break; - } - default: { - res = 0; /* cannot set */ - break; - } - } - L->top--; - lua_unlock(L); - return res; -} - - -LUA_API int lua_setfenv (lua_State *L, int idx) { - StkId o; - int res = 0; - lua_lock(L); - api_checknelems(L, 1); - o = luaA_index(L, idx); - L->top--; - api_check(L, ttistable(L->top)); - if (isLfunction(o)) { - res = 1; - clvalue(o)->l.g = *(L->top); - } - lua_unlock(L); - return res; -} - - -/* -** `load' and `call' functions (run Lua code) -*/ - -LUA_API void lua_call (lua_State *L, int nargs, int nresults) { - StkId func; - lua_lock(L); - api_checknelems(L, nargs+1); - func = L->top - (nargs+1); - luaD_call(L, func, nresults); - lua_unlock(L); -} - - - -/* -** Execute a protected call. -*/ -struct CallS { /* data to `f_call' */ - StkId func; - int nresults; -}; - - -static void f_call (lua_State *L, void *ud) { - struct CallS *c = cast(struct CallS *, ud); - luaD_call(L, c->func, c->nresults); -} - - - -LUA_API int lua_pcall (lua_State *L, int nargs, int nresults, int errfunc) { - struct CallS c; - int status; - ptrdiff_t func; - lua_lock(L); - func = (errfunc == 0) ? 0 : savestack(L, luaA_index(L, errfunc)); - c.func = L->top - (nargs+1); /* function to be called */ - c.nresults = nresults; - status = luaD_pcall(L, f_call, &c, savestack(L, c.func), func); - lua_unlock(L); - return status; -} - - -/* -** Execute a protected C call. -*/ -struct CCallS { /* data to `f_Ccall' */ - lua_CFunction func; - void *ud; -}; - - -static void f_Ccall (lua_State *L, void *ud) { - struct CCallS *c = cast(struct CCallS *, ud); - Closure *cl; - cl = luaF_newCclosure(L, 0); - cl->c.f = c->func; - setclvalue(L->top, cl); /* push function */ - incr_top(L); - setpvalue(L->top, c->ud); /* push only argument */ - incr_top(L); - luaD_call(L, L->top - 2, 0); -} - - -LUA_API int lua_cpcall (lua_State *L, lua_CFunction func, void *ud) { - struct CCallS c; - int status; - lua_lock(L); - c.func = func; - c.ud = ud; - status = luaD_pcall(L, f_Ccall, &c, savestack(L, L->top), 0); - lua_unlock(L); - return status; -} - - -LUA_API int lua_load (lua_State *L, lua_Chunkreader reader, void *data, - const char *chunkname) { - ZIO z; - int status; - int c; - lua_lock(L); - if (!chunkname) chunkname = "?"; - luaZ_init(&z, reader, data, chunkname); - c = luaZ_lookahead(&z); - status = luaD_protectedparser(L, &z, (c == LUA_SIGNATURE[0])); - lua_unlock(L); - return status; -} - - -LUA_API int lua_dump (lua_State *L, lua_Chunkwriter writer, void *data) { - int status; - TObject *o; - lua_lock(L); - api_checknelems(L, 1); - o = L->top - 1; - if (isLfunction(o) && clvalue(o)->l.nupvalues == 0) { - luaU_dump(L, clvalue(o)->l.p, writer, data); - status = 1; - } - else - status = 0; - lua_unlock(L); - return status; -} - - -/* -** Garbage-collection functions -*/ - -/* GC values are expressed in Kbytes: #bytes/2^10 */ -#define GCscalel(x) ((x)>>10) -#define GCscale(x) (cast(int, GCscalel(x))) -#define GCunscale(x) (cast(lu_mem, x)<<10) - -LUA_API int lua_getgcthreshold (lua_State *L) { - int threshold; - lua_lock(L); - threshold = GCscale(G(L)->GCthreshold); - lua_unlock(L); - return threshold; -} - -LUA_API int lua_getgccount (lua_State *L) { - int count; - lua_lock(L); - count = GCscale(G(L)->nblocks); - lua_unlock(L); - return count; -} - -LUA_API void lua_setgcthreshold (lua_State *L, int newthreshold) { - lua_lock(L); - if (cast(lu_mem, newthreshold) > GCscalel(MAX_LUMEM)) - G(L)->GCthreshold = MAX_LUMEM; - else - G(L)->GCthreshold = GCunscale(newthreshold); - luaC_checkGC(L); - lua_unlock(L); -} - - -/* -** miscellaneous functions -*/ - - -LUA_API const char *lua_version (void) { - return LUA_VERSION; -} - - -LUA_API int lua_error (lua_State *L) { - lua_lock(L); - api_checknelems(L, 1); - luaG_errormsg(L); - lua_unlock(L); - return 0; /* to avoid warnings */ -} - - -LUA_API int lua_next (lua_State *L, int idx) { - StkId t; - int more; - lua_lock(L); - t = luaA_index(L, idx); - api_check(L, ttistable(t)); - more = luaH_next(L, hvalue(t), L->top - 1); - if (more) { - api_incr_top(L); - } - else /* no more elements */ - L->top -= 1; /* remove key */ - lua_unlock(L); - return more; -} - - -LUA_API void lua_concat (lua_State *L, int n) { - lua_lock(L); - luaC_checkGC(L); - api_checknelems(L, n); - if (n >= 2) { - luaV_concat(L, n, L->top - L->base - 1); - L->top -= (n-1); - } - else if (n == 0) { /* push empty string */ - setsvalue2s(L->top, luaS_newlstr(L, NULL, 0)); - api_incr_top(L); - } - /* else n == 1; nothing to do */ - lua_unlock(L); -} - - -LUA_API void *lua_newuserdata (lua_State *L, size_t size) { - Udata *u; - lua_lock(L); - luaC_checkGC(L); - u = luaS_newudata(L, size); - setuvalue(L->top, u); - api_incr_top(L); - lua_unlock(L); - return u + 1; -} - - -LUA_API int lua_pushupvalues (lua_State *L) { - Closure *func; - int n, i; - lua_lock(L); - api_check(L, iscfunction(L->base - 1)); - func = clvalue(L->base - 1); - n = func->c.nupvalues; - luaD_checkstack(L, n + LUA_MINSTACK); - for (i=0; i<n; i++) { - setobj2s(L->top, &func->c.upvalue[i]); - L->top++; - } - lua_unlock(L); - return n; -} - - -static const char *aux_upvalue (lua_State *L, int funcindex, int n, - TObject **val) { - Closure *f; - StkId fi = luaA_index(L, funcindex); - if (!ttisfunction(fi)) return NULL; - f = clvalue(fi); - if (f->c.isC) { - if (n > f->c.nupvalues) return NULL; - *val = &f->c.upvalue[n-1]; - return ""; - } - else { - Proto *p = f->l.p; - if (n > p->sizeupvalues) return NULL; - *val = f->l.upvals[n-1]->v; - return getstr(p->upvalues[n-1]); - } -} - - -LUA_API const char *lua_getupvalue (lua_State *L, int funcindex, int n) { - const char *name; - TObject *val; - lua_lock(L); - name = aux_upvalue(L, funcindex, n, &val); - if (name) { - setobj2s(L->top, val); - api_incr_top(L); - } - lua_unlock(L); - return name; -} - - -LUA_API const char *lua_setupvalue (lua_State *L, int funcindex, int n) { - const char *name; - TObject *val; - lua_lock(L); - api_checknelems(L, 1); - name = aux_upvalue(L, funcindex, n, &val); - if (name) { - L->top--; - setobj(val, L->top); /* write barrier */ - } - lua_unlock(L); - return name; -} - +/*
+** $Id: lapi.c,v 1.3 2004-11-27 21:35:20 pixel Exp $
+** Lua API
+** See Copyright Notice in lua.h
+*/
+
+
+#include <assert.h>
+#include <string.h>
+
+#define lapi_c
+
+#include "lua.h"
+
+#include "lapi.h"
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lgc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+#include "lundump.h"
+#include "lvm.h"
+
+
+const char lua_ident[] =
+ "$Lua: " LUA_VERSION " " LUA_COPYRIGHT " $\n"
+ "$Authors: " LUA_AUTHORS " $\n"
+ "$URL: www.lua.org $\n";
+
+
+
+#ifndef api_check
+#define api_check(L, o) /*{ assert(o); }*/
+#endif
+
+#define api_checknelems(L, n) api_check(L, (n) <= (L->top - L->base))
+
+#define api_incr_top(L) {api_check(L, L->top < L->ci->top); L->top++;}
+
+
+
+
+static TObject *negindex (lua_State *L, int idx) {
+ if (idx > LUA_REGISTRYINDEX) {
+ api_check(L, idx != 0 && -idx <= L->top - L->base);
+ return L->top+idx;
+ }
+ else switch (idx) { /* pseudo-indices */
+ case LUA_REGISTRYINDEX: return registry(L);
+ case LUA_GLOBALSINDEX: return gt(L);
+ default: {
+ TObject *func = (L->base - 1);
+ idx = LUA_GLOBALSINDEX - idx;
+ lua_assert(iscfunction(func));
+ return (idx <= clvalue(func)->c.nupvalues)
+ ? &clvalue(func)->c.upvalue[idx-1]
+ : NULL;
+ }
+ }
+}
+
+
+static TObject *luaA_index (lua_State *L, int idx) {
+ if (idx > 0) {
+ api_check(L, idx <= L->top - L->base);
+ return L->base + idx - 1;
+ }
+ else {
+ TObject *o = negindex(L, idx);
+ api_check(L, o != NULL);
+ return o;
+ }
+}
+
+
+static TObject *luaA_indexAcceptable (lua_State *L, int idx) {
+ if (idx > 0) {
+ TObject *o = L->base+(idx-1);
+ api_check(L, idx <= L->stack_last - L->base);
+ if (o >= L->top) return NULL;
+ else return o;
+ }
+ else
+ return negindex(L, idx);
+}
+
+
+void luaA_pushobject (lua_State *L, const TObject *o) {
+ setobj2s(L->top, o);
+ incr_top(L);
+}
+
+
+LUA_API int lua_checkstack (lua_State *L, int size) {
+ int res;
+ lua_lock(L);
+ if ((L->top - L->base + size) > LUA_MAXCSTACK)
+ res = 0; /* stack overflow */
+ else {
+ luaD_checkstack(L, size);
+ if (L->ci->top < L->top + size)
+ L->ci->top = L->top + size;
+ res = 1;
+ }
+ lua_unlock(L);
+ return res;
+}
+
+
+LUA_API void lua_xmove (lua_State *from, lua_State *to, int n) {
+ int i;
+ lua_lock(to);
+ api_checknelems(from, n);
+ from->top -= n;
+ for (i = 0; i < n; i++) {
+ setobj2s(to->top, from->top + i);
+ api_incr_top(to);
+ }
+ lua_unlock(to);
+}
+
+
+LUA_API lua_CFunction lua_atpanic (lua_State *L, lua_CFunction panicf) {
+ lua_CFunction old;
+ lua_lock(L);
+ old = G(L)->panic;
+ G(L)->panic = panicf;
+ lua_unlock(L);
+ return old;
+}
+
+
+LUA_API lua_State *lua_newthread (lua_State *L) {
+ lua_State *L1;
+ lua_lock(L);
+ luaC_checkGC(L);
+ L1 = luaE_newthread(L);
+ setthvalue(L->top, L1);
+ api_incr_top(L);
+ lua_unlock(L);
+ lua_userstateopen(L1);
+ return L1;
+}
+
+
+
+/*
+** basic stack manipulation
+*/
+
+
+LUA_API int lua_gettop (lua_State *L) {
+ return (L->top - L->base);
+}
+
+
+LUA_API void lua_settop (lua_State *L, int idx) {
+ lua_lock(L);
+ if (idx >= 0) {
+ api_check(L, idx <= L->stack_last - L->base);
+ while (L->top < L->base + idx)
+ setnilvalue(L->top++);
+ L->top = L->base + idx;
+ }
+ else {
+ api_check(L, -(idx+1) <= (L->top - L->base));
+ L->top += idx+1; /* `subtract' index (index is negative) */
+ }
+ lua_unlock(L);
+}
+
+
+LUA_API void lua_remove (lua_State *L, int idx) {
+ StkId p;
+ lua_lock(L);
+ p = luaA_index(L, idx);
+ while (++p < L->top) setobjs2s(p-1, p);
+ L->top--;
+ lua_unlock(L);
+}
+
+
+LUA_API void lua_insert (lua_State *L, int idx) {
+ StkId p;
+ StkId q;
+ lua_lock(L);
+ p = luaA_index(L, idx);
+ for (q = L->top; q>p; q--) setobjs2s(q, q-1);
+ setobjs2s(p, L->top);
+ lua_unlock(L);
+}
+
+
+LUA_API void lua_replace (lua_State *L, int idx) {
+ lua_lock(L);
+ api_checknelems(L, 1);
+ setobj(luaA_index(L, idx), L->top - 1); /* write barrier */
+ L->top--;
+ lua_unlock(L);
+}
+
+
+LUA_API void lua_pushvalue (lua_State *L, int idx) {
+ lua_lock(L);
+ setobj2s(L->top, luaA_index(L, idx));
+ api_incr_top(L);
+ lua_unlock(L);
+}
+
+
+
+/*
+** access functions (stack -> C)
+*/
+
+
+LUA_API int lua_type (lua_State *L, int idx) {
+ StkId o = luaA_indexAcceptable(L, idx);
+ return (o == NULL) ? LUA_TNONE : ttype(o);
+}
+
+
+LUA_API const char *lua_typename (lua_State *L, int t) {
+ UNUSED(L);
+ return (t == LUA_TNONE) ? "no value" : luaT_typenames[t];
+}
+
+
+LUA_API int lua_iscfunction (lua_State *L, int idx) {
+ StkId o = luaA_indexAcceptable(L, idx);
+ return (o == NULL) ? 0 : iscfunction(o);
+}
+
+
+LUA_API int lua_isnumber (lua_State *L, int idx) {
+ TObject n;
+ const TObject *o = luaA_indexAcceptable(L, idx);
+ return (o != NULL && tonumber(o, &n));
+}
+
+
+LUA_API int lua_isstring (lua_State *L, int idx) {
+ int t = lua_type(L, idx);
+ return (t == LUA_TSTRING || t == LUA_TNUMBER);
+}
+
+
+LUA_API int lua_isuserdata (lua_State *L, int idx) {
+ const TObject *o = luaA_indexAcceptable(L, idx);
+ return (o != NULL && (ttisuserdata(o) || ttislightuserdata(o)));
+}
+
+
+LUA_API int lua_rawequal (lua_State *L, int index1, int index2) {
+ StkId o1 = luaA_indexAcceptable(L, index1);
+ StkId o2 = luaA_indexAcceptable(L, index2);
+ return (o1 == NULL || o2 == NULL) ? 0 /* index out of range */
+ : luaO_rawequalObj(o1, o2);
+}
+
+
+LUA_API int lua_equal (lua_State *L, int index1, int index2) {
+ StkId o1, o2;
+ int i;
+ lua_lock(L); /* may call tag method */
+ o1 = luaA_indexAcceptable(L, index1);
+ o2 = luaA_indexAcceptable(L, index2);
+ i = (o1 == NULL || o2 == NULL) ? 0 /* index out of range */
+ : equalobj(L, o1, o2);
+ lua_unlock(L);
+ return i;
+}
+
+
+LUA_API int lua_lessthan (lua_State *L, int index1, int index2) {
+ StkId o1, o2;
+ int i;
+ lua_lock(L); /* may call tag method */
+ o1 = luaA_indexAcceptable(L, index1);
+ o2 = luaA_indexAcceptable(L, index2);
+ i = (o1 == NULL || o2 == NULL) ? 0 /* index out-of-range */
+ : luaV_lessthan(L, o1, o2);
+ lua_unlock(L);
+ return i;
+}
+
+
+
+LUA_API lua_Number lua_tonumber (lua_State *L, int idx) {
+ TObject n;
+ const TObject *o = luaA_indexAcceptable(L, idx);
+ if (o != NULL && tonumber(o, &n))
+ return nvalue(o);
+ else
+ return 0;
+}
+
+
+LUA_API int lua_toboolean (lua_State *L, int idx) {
+ const TObject *o = luaA_indexAcceptable(L, idx);
+ return (o != NULL) && !l_isfalse(o);
+}
+
+
+LUA_API const char *lua_tostring (lua_State *L, int idx) {
+ StkId o = luaA_indexAcceptable(L, idx);
+ if (o == NULL)
+ return NULL;
+ else if (ttisstring(o))
+ return svalue(o);
+ else {
+ const char *s;
+ lua_lock(L); /* `luaV_tostring' may create a new string */
+ s = (luaV_tostring(L, o) ? svalue(o) : NULL);
+ luaC_checkGC(L);
+ lua_unlock(L);
+ return s;
+ }
+}
+
+
+LUA_API size_t lua_strlen (lua_State *L, int idx) {
+ StkId o = luaA_indexAcceptable(L, idx);
+ if (o == NULL)
+ return 0;
+ else if (ttisstring(o))
+ return tsvalue(o)->tsv.len;
+ else {
+ size_t l;
+ lua_lock(L); /* `luaV_tostring' may create a new string */
+ l = (luaV_tostring(L, o) ? tsvalue(o)->tsv.len : 0);
+ lua_unlock(L);
+ return l;
+ }
+}
+
+
+LUA_API lua_CFunction lua_tocfunction (lua_State *L, int idx) {
+ StkId o = luaA_indexAcceptable(L, idx);
+ return (o == NULL || !iscfunction(o)) ? NULL : clvalue(o)->c.f;
+}
+
+
+LUA_API void *lua_touserdata (lua_State *L, int idx) {
+ StkId o = luaA_indexAcceptable(L, idx);
+ if (o == NULL) return NULL;
+ switch (ttype(o)) {
+ case LUA_TUSERDATA: return (uvalue(o) + 1);
+ case LUA_TLIGHTUSERDATA: return pvalue(o);
+ default: return NULL;
+ }
+}
+
+
+LUA_API lua_State *lua_tothread (lua_State *L, int idx) {
+ StkId o = luaA_indexAcceptable(L, idx);
+ return (o == NULL || !ttisthread(o)) ? NULL : thvalue(o);
+}
+
+
+LUA_API const void *lua_topointer (lua_State *L, int idx) {
+ StkId o = luaA_indexAcceptable(L, idx);
+ if (o == NULL) return NULL;
+ else {
+ switch (ttype(o)) {
+ case LUA_TTABLE: return hvalue(o);
+ case LUA_TFUNCTION: return clvalue(o);
+ case LUA_TTHREAD: return thvalue(o);
+ case LUA_TUSERDATA:
+ case LUA_TLIGHTUSERDATA:
+ return lua_touserdata(L, idx);
+ default: return NULL;
+ }
+ }
+}
+
+
+
+/*
+** push functions (C -> stack)
+*/
+
+
+LUA_API void lua_pushnil (lua_State *L) {
+ lua_lock(L);
+ setnilvalue(L->top);
+ api_incr_top(L);
+ lua_unlock(L);
+}
+
+
+LUA_API void lua_pushnumber (lua_State *L, lua_Number n) {
+ lua_lock(L);
+ setnvalue(L->top, n);
+ api_incr_top(L);
+ lua_unlock(L);
+}
+
+
+LUA_API void lua_pushlstring (lua_State *L, const char *s, size_t len) {
+ lua_lock(L);
+ luaC_checkGC(L);
+ setsvalue2s(L->top, luaS_newlstr(L, s, len));
+ api_incr_top(L);
+ lua_unlock(L);
+}
+
+
+LUA_API void lua_pushstring (lua_State *L, const char *s) {
+ if (s == NULL)
+ lua_pushnil(L);
+ else
+ lua_pushlstring(L, s, strlen(s));
+}
+
+
+LUA_API const char *lua_pushvfstring (lua_State *L, const char *fmt,
+ va_list argp) {
+ const char *ret;
+ lua_lock(L);
+ luaC_checkGC(L);
+ ret = luaO_pushvfstring(L, fmt, argp);
+ lua_unlock(L);
+ return ret;
+}
+
+
+LUA_API const char *lua_pushfstring (lua_State *L, const char *fmt, ...) {
+ const char *ret;
+ va_list argp;
+ lua_lock(L);
+ luaC_checkGC(L);
+ va_start(argp, fmt);
+ ret = luaO_pushvfstring(L, fmt, argp);
+ va_end(argp);
+ lua_unlock(L);
+ return ret;
+}
+
+
+LUA_API void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n) {
+ Closure *cl;
+ lua_lock(L);
+ luaC_checkGC(L);
+ api_checknelems(L, n);
+ cl = luaF_newCclosure(L, n);
+ cl->c.f = fn;
+ L->top -= n;
+ while (n--)
+ setobj2n(&cl->c.upvalue[n], L->top+n);
+ setclvalue(L->top, cl);
+ api_incr_top(L);
+ lua_unlock(L);
+}
+
+
+LUA_API void lua_pushboolean (lua_State *L, int b) {
+ lua_lock(L);
+ setbvalue(L->top, (b != 0)); /* ensure that true is 1 */
+ api_incr_top(L);
+ lua_unlock(L);
+}
+
+
+LUA_API void lua_pushlightuserdata (lua_State *L, void *p) {
+ lua_lock(L);
+ setpvalue(L->top, p);
+ api_incr_top(L);
+ lua_unlock(L);
+}
+
+
+
+/*
+** get functions (Lua -> stack)
+*/
+
+
+LUA_API void lua_gettable (lua_State *L, int idx) {
+ StkId t;
+ lua_lock(L);
+ t = luaA_index(L, idx);
+ setobj2s(L->top - 1, luaV_gettable(L, t, L->top - 1, 0));
+ lua_unlock(L);
+}
+
+
+LUA_API void lua_rawget (lua_State *L, int idx) {
+ StkId t;
+ lua_lock(L);
+ t = luaA_index(L, idx);
+ api_check(L, ttistable(t));
+ setobj2s(L->top - 1, luaH_get(hvalue(t), L->top - 1));
+ lua_unlock(L);
+}
+
+
+LUA_API void lua_rawgeti (lua_State *L, int idx, int n) {
+ StkId o;
+ lua_lock(L);
+ o = luaA_index(L, idx);
+ api_check(L, ttistable(o));
+ setobj2s(L->top, luaH_getnum(hvalue(o), n));
+ api_incr_top(L);
+ lua_unlock(L);
+}
+
+
+LUA_API void lua_newtable (lua_State *L) {
+ lua_lock(L);
+ luaC_checkGC(L);
+ sethvalue(L->top, luaH_new(L, 0, 0));
+ api_incr_top(L);
+ lua_unlock(L);
+}
+
+
+LUA_API int lua_getmetatable (lua_State *L, int objindex) {
+ const TObject *obj;
+ Table *mt = NULL;
+ int res;
+ lua_lock(L);
+ obj = luaA_indexAcceptable(L, objindex);
+ if (obj != NULL) {
+ switch (ttype(obj)) {
+ case LUA_TTABLE:
+ mt = hvalue(obj)->metatable;
+ break;
+ case LUA_TUSERDATA:
+ mt = uvalue(obj)->uv.metatable;
+ break;
+ }
+ }
+ if (mt == NULL || mt == hvalue(defaultmeta(L)))
+ res = 0;
+ else {
+ sethvalue(L->top, mt);
+ api_incr_top(L);
+ res = 1;
+ }
+ lua_unlock(L);
+ return res;
+}
+
+
+LUA_API void lua_getfenv (lua_State *L, int idx) {
+ StkId o;
+ lua_lock(L);
+ o = luaA_index(L, idx);
+ setobj2s(L->top, isLfunction(o) ? &clvalue(o)->l.g : gt(L));
+ api_incr_top(L);
+ lua_unlock(L);
+}
+
+
+/*
+** set functions (stack -> Lua)
+*/
+
+
+LUA_API void lua_settable (lua_State *L, int idx) {
+ StkId t;
+ lua_lock(L);
+ api_checknelems(L, 2);
+ t = luaA_index(L, idx);
+ luaV_settable(L, t, L->top - 2, L->top - 1);
+ L->top -= 2; /* pop index and value */
+ lua_unlock(L);
+}
+
+
+LUA_API void lua_rawset (lua_State *L, int idx) {
+ StkId t;
+ lua_lock(L);
+ api_checknelems(L, 2);
+ t = luaA_index(L, idx);
+ api_check(L, ttistable(t));
+ setobj2t(luaH_set(L, hvalue(t), L->top-2), L->top-1); /* write barrier */
+ L->top -= 2;
+ lua_unlock(L);
+}
+
+
+LUA_API void lua_rawseti (lua_State *L, int idx, int n) {
+ StkId o;
+ lua_lock(L);
+ api_checknelems(L, 1);
+ o = luaA_index(L, idx);
+ api_check(L, ttistable(o));
+ setobj2t(luaH_setnum(L, hvalue(o), n), L->top-1); /* write barrier */
+ L->top--;
+ lua_unlock(L);
+}
+
+
+LUA_API int lua_setmetatable (lua_State *L, int objindex) {
+ TObject *obj, *mt;
+ int res = 1;
+ lua_lock(L);
+ api_checknelems(L, 1);
+ obj = luaA_index(L, objindex);
+ mt = (!ttisnil(L->top - 1)) ? L->top - 1 : defaultmeta(L);
+ api_check(L, ttistable(mt));
+ switch (ttype(obj)) {
+ case LUA_TTABLE: {
+ hvalue(obj)->metatable = hvalue(mt); /* write barrier */
+ break;
+ }
+ case LUA_TUSERDATA: {
+ uvalue(obj)->uv.metatable = hvalue(mt); /* write barrier */
+ break;
+ }
+ default: {
+ res = 0; /* cannot set */
+ break;
+ }
+ }
+ L->top--;
+ lua_unlock(L);
+ return res;
+}
+
+
+LUA_API int lua_setfenv (lua_State *L, int idx) {
+ StkId o;
+ int res = 0;
+ lua_lock(L);
+ api_checknelems(L, 1);
+ o = luaA_index(L, idx);
+ L->top--;
+ api_check(L, ttistable(L->top));
+ if (isLfunction(o)) {
+ res = 1;
+ clvalue(o)->l.g = *(L->top);
+ }
+ lua_unlock(L);
+ return res;
+}
+
+
+/*
+** `load' and `call' functions (run Lua code)
+*/
+
+LUA_API void lua_call (lua_State *L, int nargs, int nresults) {
+ StkId func;
+ lua_lock(L);
+ api_checknelems(L, nargs+1);
+ func = L->top - (nargs+1);
+ luaD_call(L, func, nresults);
+ lua_unlock(L);
+}
+
+
+
+/*
+** Execute a protected call.
+*/
+struct CallS { /* data to `f_call' */
+ StkId func;
+ int nresults;
+};
+
+
+static void f_call (lua_State *L, void *ud) {
+ struct CallS *c = cast(struct CallS *, ud);
+ luaD_call(L, c->func, c->nresults);
+}
+
+
+
+LUA_API int lua_pcall (lua_State *L, int nargs, int nresults, int errfunc) {
+ struct CallS c;
+ int status;
+ ptrdiff_t func;
+ lua_lock(L);
+ func = (errfunc == 0) ? 0 : savestack(L, luaA_index(L, errfunc));
+ c.func = L->top - (nargs+1); /* function to be called */
+ c.nresults = nresults;
+ status = luaD_pcall(L, f_call, &c, savestack(L, c.func), func);
+ lua_unlock(L);
+ return status;
+}
+
+
+/*
+** Execute a protected C call.
+*/
+struct CCallS { /* data to `f_Ccall' */
+ lua_CFunction func;
+ void *ud;
+};
+
+
+static void f_Ccall (lua_State *L, void *ud) {
+ struct CCallS *c = cast(struct CCallS *, ud);
+ Closure *cl;
+ cl = luaF_newCclosure(L, 0);
+ cl->c.f = c->func;
+ setclvalue(L->top, cl); /* push function */
+ incr_top(L);
+ setpvalue(L->top, c->ud); /* push only argument */
+ incr_top(L);
+ luaD_call(L, L->top - 2, 0);
+}
+
+
+LUA_API int lua_cpcall (lua_State *L, lua_CFunction func, void *ud) {
+ struct CCallS c;
+ int status;
+ lua_lock(L);
+ c.func = func;
+ c.ud = ud;
+ status = luaD_pcall(L, f_Ccall, &c, savestack(L, L->top), 0);
+ lua_unlock(L);
+ return status;
+}
+
+
+LUA_API int lua_load (lua_State *L, lua_Chunkreader reader, void *data,
+ const char *chunkname) {
+ ZIO z;
+ int status;
+ int c;
+ lua_lock(L);
+ if (!chunkname) chunkname = "?";
+ luaZ_init(&z, reader, data, chunkname);
+ c = luaZ_lookahead(&z);
+ status = luaD_protectedparser(L, &z, (c == LUA_SIGNATURE[0]));
+ lua_unlock(L);
+ return status;
+}
+
+
+LUA_API int lua_dump (lua_State *L, lua_Chunkwriter writer, void *data) {
+ int status;
+ TObject *o;
+ lua_lock(L);
+ api_checknelems(L, 1);
+ o = L->top - 1;
+ if (isLfunction(o) && clvalue(o)->l.nupvalues == 0) {
+ luaU_dump(L, clvalue(o)->l.p, writer, data);
+ status = 1;
+ }
+ else
+ status = 0;
+ lua_unlock(L);
+ return status;
+}
+
+
+/*
+** Garbage-collection functions
+*/
+
+/* GC values are expressed in Kbytes: #bytes/2^10 */
+#define GCscalel(x) ((x)>>10)
+#define GCscale(x) (cast(int, GCscalel(x)))
+#define GCunscale(x) (cast(lu_mem, x)<<10)
+
+LUA_API int lua_getgcthreshold (lua_State *L) {
+ int threshold;
+ lua_lock(L);
+ threshold = GCscale(G(L)->GCthreshold);
+ lua_unlock(L);
+ return threshold;
+}
+
+LUA_API int lua_getgccount (lua_State *L) {
+ int count;
+ lua_lock(L);
+ count = GCscale(G(L)->nblocks);
+ lua_unlock(L);
+ return count;
+}
+
+LUA_API void lua_setgcthreshold (lua_State *L, int newthreshold) {
+ lua_lock(L);
+ if (cast(lu_mem, newthreshold) > GCscalel(MAX_LUMEM))
+ G(L)->GCthreshold = MAX_LUMEM;
+ else
+ G(L)->GCthreshold = GCunscale(newthreshold);
+ luaC_checkGC(L);
+ lua_unlock(L);
+}
+
+
+/*
+** miscellaneous functions
+*/
+
+
+LUA_API const char *lua_version (void) {
+ return LUA_VERSION;
+}
+
+
+LUA_API int lua_error (lua_State *L) {
+ lua_lock(L);
+ api_checknelems(L, 1);
+ luaG_errormsg(L);
+ lua_unlock(L);
+ return 0; /* to avoid warnings */
+}
+
+
+LUA_API int lua_next (lua_State *L, int idx) {
+ StkId t;
+ int more;
+ lua_lock(L);
+ t = luaA_index(L, idx);
+ api_check(L, ttistable(t));
+ more = luaH_next(L, hvalue(t), L->top - 1);
+ if (more) {
+ api_incr_top(L);
+ }
+ else /* no more elements */
+ L->top -= 1; /* remove key */
+ lua_unlock(L);
+ return more;
+}
+
+
+LUA_API void lua_concat (lua_State *L, int n) {
+ lua_lock(L);
+ luaC_checkGC(L);
+ api_checknelems(L, n);
+ if (n >= 2) {
+ luaV_concat(L, n, L->top - L->base - 1);
+ L->top -= (n-1);
+ }
+ else if (n == 0) { /* push empty string */
+ setsvalue2s(L->top, luaS_newlstr(L, NULL, 0));
+ api_incr_top(L);
+ }
+ /* else n == 1; nothing to do */
+ lua_unlock(L);
+}
+
+
+LUA_API void *lua_newuserdata (lua_State *L, size_t size) {
+ Udata *u;
+ lua_lock(L);
+ luaC_checkGC(L);
+ u = luaS_newudata(L, size);
+ setuvalue(L->top, u);
+ api_incr_top(L);
+ lua_unlock(L);
+ return u + 1;
+}
+
+
+LUA_API int lua_pushupvalues (lua_State *L) {
+ Closure *func;
+ int n, i;
+ lua_lock(L);
+ api_check(L, iscfunction(L->base - 1));
+ func = clvalue(L->base - 1);
+ n = func->c.nupvalues;
+ luaD_checkstack(L, n + LUA_MINSTACK);
+ for (i=0; i<n; i++) {
+ setobj2s(L->top, &func->c.upvalue[i]);
+ L->top++;
+ }
+ lua_unlock(L);
+ return n;
+}
+
+
+static const char *aux_upvalue (lua_State *L, int funcindex, int n,
+ TObject **val) {
+ Closure *f;
+ StkId fi = luaA_index(L, funcindex);
+ if (!ttisfunction(fi)) return NULL;
+ f = clvalue(fi);
+ if (f->c.isC) {
+ if (n > f->c.nupvalues) return NULL;
+ *val = &f->c.upvalue[n-1];
+ return "";
+ }
+ else {
+ Proto *p = f->l.p;
+ if (n > p->sizeupvalues) return NULL;
+ *val = f->l.upvals[n-1]->v;
+ return getstr(p->upvalues[n-1]);
+ }
+}
+
+
+LUA_API const char *lua_getupvalue (lua_State *L, int funcindex, int n) {
+ const char *name;
+ TObject *val;
+ lua_lock(L);
+ name = aux_upvalue(L, funcindex, n, &val);
+ if (name) {
+ setobj2s(L->top, val);
+ api_incr_top(L);
+ }
+ lua_unlock(L);
+ return name;
+}
+
+
+LUA_API const char *lua_setupvalue (lua_State *L, int funcindex, int n) {
+ const char *name;
+ TObject *val;
+ lua_lock(L);
+ api_checknelems(L, 1);
+ name = aux_upvalue(L, funcindex, n, &val);
+ if (name) {
+ L->top--;
+ setobj(val, L->top); /* write barrier */
+ }
+ lua_unlock(L);
+ return name;
+}
+
diff --git a/lib/lua/src/lcode.c b/lib/lua/src/lcode.c index fc4a146..a873ed8 100644 --- a/lib/lua/src/lcode.c +++ b/lib/lua/src/lcode.c @@ -1,714 +1,714 @@ -/* -** $Id: lcode.c,v 1.2 2003-12-11 16:53:30 pixel Exp $ -** Code generator for Lua -** See Copyright Notice in lua.h -*/ - - -#include <stdlib.h> - -#define lcode_c - -#include "lua.h" - -#include "lcode.h" -#include "ldebug.h" -#include "ldo.h" -#include "llex.h" -#include "lmem.h" -#include "lobject.h" -#include "lopcodes.h" -#include "lparser.h" -#include "ltable.h" - - -#define hasjumps(e) ((e)->t != (e)->f) - - -void luaK_nil (FuncState *fs, int from, int n) { - Instruction *previous; - if (fs->pc > fs->lasttarget && /* no jumps to current position? */ - GET_OPCODE(*(previous = &fs->f->code[fs->pc-1])) == OP_LOADNIL) { - int pfrom = GETARG_A(*previous); - int pto = GETARG_B(*previous); - if (pfrom <= from && from <= pto+1) { /* can connect both? */ - if (from+n-1 > pto) - SETARG_B(*previous, from+n-1); - return; - } - } - luaK_codeABC(fs, OP_LOADNIL, from, from+n-1, 0); /* else no optimization */ -} - - -int luaK_jump (FuncState *fs) { - int jpc = fs->jpc; /* save list of jumps to here */ - int j; - fs->jpc = NO_JUMP; - j = luaK_codeAsBx(fs, OP_JMP, 0, NO_JUMP); - luaK_concat(fs, &j, jpc); /* keep them on hold */ - return j; -} - - -static int luaK_condjump (FuncState *fs, OpCode op, int A, int B, int C) { - luaK_codeABC(fs, op, A, B, C); - return luaK_jump(fs); -} - - -static void luaK_fixjump (FuncState *fs, int pc, int dest) { - Instruction *jmp = &fs->f->code[pc]; - int offset = dest-(pc+1); - lua_assert(dest != NO_JUMP); - if (abs(offset) > MAXARG_sBx) - luaX_syntaxerror(fs->ls, "control structure too long"); - SETARG_sBx(*jmp, offset); -} - - -/* -** returns current `pc' and marks it as a jump target (to avoid wrong -** optimizations with consecutive instructions not in the same basic block). -*/ -int luaK_getlabel (FuncState *fs) { - fs->lasttarget = fs->pc; - return fs->pc; -} - - -static int luaK_getjump (FuncState *fs, int pc) { - int offset = GETARG_sBx(fs->f->code[pc]); - if (offset == NO_JUMP) /* point to itself represents end of list */ - return NO_JUMP; /* end of list */ - else - return (pc+1)+offset; /* turn offset into absolute position */ -} - - -static Instruction *getjumpcontrol (FuncState *fs, int pc) { - Instruction *pi = &fs->f->code[pc]; - if (pc >= 1 && testOpMode(GET_OPCODE(*(pi-1)), OpModeT)) - return pi-1; - else - return pi; -} - - -/* -** check whether list has any jump that do not produce a value -** (or produce an inverted value) -*/ -static int need_value (FuncState *fs, int list, int cond) { - for (; list != NO_JUMP; list = luaK_getjump(fs, list)) { - Instruction i = *getjumpcontrol(fs, list); - if (GET_OPCODE(i) != OP_TEST || GETARG_C(i) != cond) return 1; - } - return 0; /* not found */ -} - - -static void patchtestreg (Instruction *i, int reg) { - if (reg == NO_REG) reg = GETARG_B(*i); - SETARG_A(*i, reg); -} - - -static void luaK_patchlistaux (FuncState *fs, int list, - int ttarget, int treg, int ftarget, int freg, int dtarget) { - while (list != NO_JUMP) { - int next = luaK_getjump(fs, list); - Instruction *i = getjumpcontrol(fs, list); - if (GET_OPCODE(*i) != OP_TEST) { - lua_assert(dtarget != NO_JUMP); - luaK_fixjump(fs, list, dtarget); /* jump to default target */ - } - else { - if (GETARG_C(*i)) { - lua_assert(ttarget != NO_JUMP); - patchtestreg(i, treg); - luaK_fixjump(fs, list, ttarget); - } - else { - lua_assert(ftarget != NO_JUMP); - patchtestreg(i, freg); - luaK_fixjump(fs, list, ftarget); - } - } - list = next; - } -} - - -static void luaK_dischargejpc (FuncState *fs) { - luaK_patchlistaux(fs, fs->jpc, fs->pc, NO_REG, fs->pc, NO_REG, fs->pc); - fs->jpc = NO_JUMP; -} - - -void luaK_patchlist (FuncState *fs, int list, int target) { - if (target == fs->pc) - luaK_patchtohere(fs, list); - else { - lua_assert(target < fs->pc); - luaK_patchlistaux(fs, list, target, NO_REG, target, NO_REG, target); - } -} - - -void luaK_patchtohere (FuncState *fs, int list) { - luaK_getlabel(fs); - luaK_concat(fs, &fs->jpc, list); -} - - -void luaK_concat (FuncState *fs, int *l1, int l2) { - if (l2 == NO_JUMP) return; - else if (*l1 == NO_JUMP) - *l1 = l2; - else { - int list = *l1; - int next; - while ((next = luaK_getjump(fs, list)) != NO_JUMP) /* find last element */ - list = next; - luaK_fixjump(fs, list, l2); - } -} - - -void luaK_checkstack (FuncState *fs, int n) { - int newstack = fs->freereg + n; - if (newstack > fs->f->maxstacksize) { - if (newstack >= MAXSTACK) - luaX_syntaxerror(fs->ls, "function or expression too complex"); - fs->f->maxstacksize = cast(lu_byte, newstack); - } -} - - -void luaK_reserveregs (FuncState *fs, int n) { - luaK_checkstack(fs, n); - fs->freereg += n; -} - - -static void freereg (FuncState *fs, int reg) { - if (reg >= fs->nactvar && reg < MAXSTACK) { - fs->freereg--; - lua_assert(reg == fs->freereg); - } -} - - -static void freeexp (FuncState *fs, expdesc *e) { - if (e->k == VNONRELOC) - freereg(fs, e->info); -} - - -static int addk (FuncState *fs, TObject *k, TObject *v) { - const TObject *idx = luaH_get(fs->h, k); - if (ttisnumber(idx)) { - lua_assert(luaO_rawequalObj(&fs->f->k[cast(int, nvalue(idx))], v)); - return cast(int, nvalue(idx)); - } - else { /* constant not found; create a new entry */ - Proto *f = fs->f; - luaM_growvector(fs->L, f->k, fs->nk, f->sizek, TObject, - MAXARG_Bx, "constant table overflow"); - setobj2n(&f->k[fs->nk], v); - setnvalue(luaH_set(fs->L, fs->h, k), cast(lua_Number, fs->nk)); - return fs->nk++; - } -} - - -int luaK_stringK (FuncState *fs, TString *s) { - TObject o; - setsvalue(&o, s); - return addk(fs, &o, &o); -} - - -int luaK_numberK (FuncState *fs, lua_Number r) { - TObject o; - setnvalue(&o, r); - return addk(fs, &o, &o); -} - - -static int nil_constant (FuncState *fs) { - TObject k, v; - setnilvalue(&v); - sethvalue(&k, fs->h); /* cannot use nil as key; instead use table itself */ - return addk(fs, &k, &v); -} - - -void luaK_setcallreturns (FuncState *fs, expdesc *e, int nresults) { - if (e->k == VCALL) { /* expression is an open function call? */ - SETARG_C(getcode(fs, e), nresults+1); - if (nresults == 1) { /* `regular' expression? */ - e->k = VNONRELOC; - e->info = GETARG_A(getcode(fs, e)); - } - } -} - - -void luaK_dischargevars (FuncState *fs, expdesc *e) { - switch (e->k) { - case VLOCAL: { - e->k = VNONRELOC; - break; - } - case VUPVAL: { - e->info = luaK_codeABC(fs, OP_GETUPVAL, 0, e->info, 0); - e->k = VRELOCABLE; - break; - } - case VGLOBAL: { - e->info = luaK_codeABx(fs, OP_GETGLOBAL, 0, e->info); - e->k = VRELOCABLE; - break; - } - case VINDEXED: { - freereg(fs, e->aux); - freereg(fs, e->info); - e->info = luaK_codeABC(fs, OP_GETTABLE, 0, e->info, e->aux); - e->k = VRELOCABLE; - break; - } - case VCALL: { - luaK_setcallreturns(fs, e, 1); - break; - } - default: break; /* there is one value available (somewhere) */ - } -} - - -static int code_label (FuncState *fs, int A, int b, int jump) { - luaK_getlabel(fs); /* those instructions may be jump targets */ - return luaK_codeABC(fs, OP_LOADBOOL, A, b, jump); -} - - -static void discharge2reg (FuncState *fs, expdesc *e, int reg) { - luaK_dischargevars(fs, e); - switch (e->k) { - case VNIL: { - luaK_nil(fs, reg, 1); - break; - } - case VFALSE: case VTRUE: { - luaK_codeABC(fs, OP_LOADBOOL, reg, e->k == VTRUE, 0); - break; - } - case VK: { - luaK_codeABx(fs, OP_LOADK, reg, e->info); - break; - } - case VRELOCABLE: { - Instruction *pc = &getcode(fs, e); - SETARG_A(*pc, reg); - break; - } - case VNONRELOC: { - if (reg != e->info) - luaK_codeABC(fs, OP_MOVE, reg, e->info, 0); - break; - } - default: { - lua_assert(e->k == VVOID || e->k == VJMP); - return; /* nothing to do... */ - } - } - e->info = reg; - e->k = VNONRELOC; -} - - -static void discharge2anyreg (FuncState *fs, expdesc *e) { - if (e->k != VNONRELOC) { - luaK_reserveregs(fs, 1); - discharge2reg(fs, e, fs->freereg-1); - } -} - - -static void luaK_exp2reg (FuncState *fs, expdesc *e, int reg) { - discharge2reg(fs, e, reg); - if (e->k == VJMP) - luaK_concat(fs, &e->t, e->info); /* put this jump in `t' list */ - if (hasjumps(e)) { - int final; /* position after whole expression */ - int p_f = NO_JUMP; /* position of an eventual LOAD false */ - int p_t = NO_JUMP; /* position of an eventual LOAD true */ - if (need_value(fs, e->t, 1) || need_value(fs, e->f, 0)) { - int fj = NO_JUMP; /* first jump (over LOAD ops.) */ - if (e->k != VJMP) - fj = luaK_jump(fs); - p_f = code_label(fs, reg, 0, 1); - p_t = code_label(fs, reg, 1, 0); - luaK_patchtohere(fs, fj); - } - final = luaK_getlabel(fs); - luaK_patchlistaux(fs, e->f, p_f, NO_REG, final, reg, p_f); - luaK_patchlistaux(fs, e->t, final, reg, p_t, NO_REG, p_t); - } - e->f = e->t = NO_JUMP; - e->info = reg; - e->k = VNONRELOC; -} - - -void luaK_exp2nextreg (FuncState *fs, expdesc *e) { - luaK_dischargevars(fs, e); - freeexp(fs, e); - luaK_reserveregs(fs, 1); - luaK_exp2reg(fs, e, fs->freereg - 1); -} - - -int luaK_exp2anyreg (FuncState *fs, expdesc *e) { - luaK_dischargevars(fs, e); - if (e->k == VNONRELOC) { - if (!hasjumps(e)) return e->info; /* exp is already in a register */ - if (e->info >= fs->nactvar) { /* reg. is not a local? */ - luaK_exp2reg(fs, e, e->info); /* put value on it */ - return e->info; - } - } - luaK_exp2nextreg(fs, e); /* default */ - return e->info; -} - - -void luaK_exp2val (FuncState *fs, expdesc *e) { - if (hasjumps(e)) - luaK_exp2anyreg(fs, e); - else - luaK_dischargevars(fs, e); -} - - -int luaK_exp2RK (FuncState *fs, expdesc *e) { - luaK_exp2val(fs, e); - switch (e->k) { - case VNIL: { - if (fs->nk + MAXSTACK <= MAXARG_C) { /* constant fit in argC? */ - e->info = nil_constant(fs); - e->k = VK; - return e->info + MAXSTACK; - } - else break; - } - case VK: { - if (e->info + MAXSTACK <= MAXARG_C) /* constant fit in argC? */ - return e->info + MAXSTACK; - else break; - } - default: break; - } - /* not a constant in the right range: put it in a register */ - return luaK_exp2anyreg(fs, e); -} - - -void luaK_storevar (FuncState *fs, expdesc *var, expdesc *exp) { - switch (var->k) { - case VLOCAL: { - freeexp(fs, exp); - luaK_exp2reg(fs, exp, var->info); - return; - } - case VUPVAL: { - int e = luaK_exp2anyreg(fs, exp); - luaK_codeABC(fs, OP_SETUPVAL, e, var->info, 0); - break; - } - case VGLOBAL: { - int e = luaK_exp2anyreg(fs, exp); - luaK_codeABx(fs, OP_SETGLOBAL, e, var->info); - break; - } - case VINDEXED: { - int e = luaK_exp2RK(fs, exp); - luaK_codeABC(fs, OP_SETTABLE, var->info, var->aux, e); - break; - } - default: { - lua_assert(0); /* invalid var kind to store */ - break; - } - } - freeexp(fs, exp); -} - - -void luaK_self (FuncState *fs, expdesc *e, expdesc *key) { - int func; - luaK_exp2anyreg(fs, e); - freeexp(fs, e); - func = fs->freereg; - luaK_reserveregs(fs, 2); - luaK_codeABC(fs, OP_SELF, func, e->info, luaK_exp2RK(fs, key)); - freeexp(fs, key); - e->info = func; - e->k = VNONRELOC; -} - - -static void invertjump (FuncState *fs, expdesc *e) { - Instruction *pc = getjumpcontrol(fs, e->info); - lua_assert(testOpMode(GET_OPCODE(*pc), OpModeT) && - GET_OPCODE(*pc) != OP_TEST); - SETARG_A(*pc, !(GETARG_A(*pc))); -} - - -static int jumponcond (FuncState *fs, expdesc *e, int cond) { - if (e->k == VRELOCABLE) { - Instruction ie = getcode(fs, e); - if (GET_OPCODE(ie) == OP_NOT) { - fs->pc--; /* remove previous OP_NOT */ - return luaK_condjump(fs, OP_TEST, NO_REG, GETARG_B(ie), !cond); - } - /* else go through */ - } - discharge2anyreg(fs, e); - freeexp(fs, e); - return luaK_condjump(fs, OP_TEST, NO_REG, e->info, cond); -} - - -void luaK_goiftrue (FuncState *fs, expdesc *e) { - int pc; /* pc of last jump */ - luaK_dischargevars(fs, e); - switch (e->k) { - case VK: case VTRUE: { - pc = NO_JUMP; /* always true; do nothing */ - break; - } - case VFALSE: { - pc = luaK_jump(fs); /* always jump */ - break; - } - case VJMP: { - invertjump(fs, e); - pc = e->info; - break; - } - default: { - pc = jumponcond(fs, e, 0); - break; - } - } - luaK_concat(fs, &e->f, pc); /* insert last jump in `f' list */ -} - - -void luaK_goiffalse (FuncState *fs, expdesc *e) { - int pc; /* pc of last jump */ - luaK_dischargevars(fs, e); - switch (e->k) { - case VNIL: case VFALSE: { - pc = NO_JUMP; /* always false; do nothing */ - break; - } - case VTRUE: { - pc = luaK_jump(fs); /* always jump */ - break; - } - case VJMP: { - pc = e->info; - break; - } - default: { - pc = jumponcond(fs, e, 1); - break; - } - } - luaK_concat(fs, &e->t, pc); /* insert last jump in `t' list */ -} - - -static void codenot (FuncState *fs, expdesc *e) { - luaK_dischargevars(fs, e); - switch (e->k) { - case VNIL: case VFALSE: { - e->k = VTRUE; - break; - } - case VK: case VTRUE: { - e->k = VFALSE; - break; - } - case VJMP: { - invertjump(fs, e); - break; - } - case VRELOCABLE: - case VNONRELOC: { - discharge2anyreg(fs, e); - freeexp(fs, e); - e->info = luaK_codeABC(fs, OP_NOT, 0, e->info, 0); - e->k = VRELOCABLE; - break; - } - default: { - lua_assert(0); /* cannot happen */ - break; - } - } - /* interchange true and false lists */ - { int temp = e->f; e->f = e->t; e->t = temp; } -} - - -void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k) { - t->aux = luaK_exp2RK(fs, k); - t->k = VINDEXED; -} - - -void luaK_prefix (FuncState *fs, UnOpr op, expdesc *e) { - if (op == OPR_MINUS) { - luaK_exp2val(fs, e); - if (e->k == VK && ttisnumber(&fs->f->k[e->info])) - e->info = luaK_numberK(fs, -nvalue(&fs->f->k[e->info])); - else { - luaK_exp2anyreg(fs, e); - freeexp(fs, e); - e->info = luaK_codeABC(fs, OP_UNM, 0, e->info, 0); - e->k = VRELOCABLE; - } - } - else /* op == NOT */ - codenot(fs, e); -} - - -void luaK_infix (FuncState *fs, BinOpr op, expdesc *v) { - switch (op) { - case OPR_AND: { - luaK_goiftrue(fs, v); - luaK_patchtohere(fs, v->t); - v->t = NO_JUMP; - break; - } - case OPR_OR: { - luaK_goiffalse(fs, v); - luaK_patchtohere(fs, v->f); - v->f = NO_JUMP; - break; - } - case OPR_CONCAT: { - luaK_exp2nextreg(fs, v); /* operand must be on the `stack' */ - break; - } - default: { - luaK_exp2RK(fs, v); - break; - } - } -} - - -static void codebinop (FuncState *fs, expdesc *res, BinOpr op, - int o1, int o2) { - if (op <= OPR_POW) { /* arithmetic operator? */ - OpCode opc = cast(OpCode, (op - OPR_ADD) + OP_ADD); /* ORDER OP */ - res->info = luaK_codeABC(fs, opc, 0, o1, o2); - res->k = VRELOCABLE; - } - else { /* test operator */ - static const OpCode ops[] = {OP_EQ, OP_EQ, OP_LT, OP_LE, OP_LT, OP_LE}; - int cond = 1; - if (op >= OPR_GT) { /* `>' or `>='? */ - int temp; /* exchange args and replace by `<' or `<=' */ - temp = o1; o1 = o2; o2 = temp; /* o1 <==> o2 */ - } - else if (op == OPR_NE) cond = 0; - res->info = luaK_condjump(fs, ops[op - OPR_NE], cond, o1, o2); - res->k = VJMP; - } -} - - -void luaK_posfix (FuncState *fs, BinOpr op, expdesc *e1, expdesc *e2) { - switch (op) { - case OPR_AND: { - lua_assert(e1->t == NO_JUMP); /* list must be closed */ - luaK_dischargevars(fs, e2); - luaK_concat(fs, &e1->f, e2->f); - e1->k = e2->k; e1->info = e2->info; e1->aux = e2->aux; e1->t = e2->t; - break; - } - case OPR_OR: { - lua_assert(e1->f == NO_JUMP); /* list must be closed */ - luaK_dischargevars(fs, e2); - luaK_concat(fs, &e1->t, e2->t); - e1->k = e2->k; e1->info = e2->info; e1->aux = e2->aux; e1->f = e2->f; - break; - } - case OPR_CONCAT: { - luaK_exp2val(fs, e2); - if (e2->k == VRELOCABLE && GET_OPCODE(getcode(fs, e2)) == OP_CONCAT) { - lua_assert(e1->info == GETARG_B(getcode(fs, e2))-1); - freeexp(fs, e1); - SETARG_B(getcode(fs, e2), e1->info); - e1->k = e2->k; e1->info = e2->info; - } - else { - luaK_exp2nextreg(fs, e2); - freeexp(fs, e2); - freeexp(fs, e1); - e1->info = luaK_codeABC(fs, OP_CONCAT, 0, e1->info, e2->info); - e1->k = VRELOCABLE; - } - break; - } - default: { - int o1 = luaK_exp2RK(fs, e1); - int o2 = luaK_exp2RK(fs, e2); - freeexp(fs, e2); - freeexp(fs, e1); - codebinop(fs, e1, op, o1, o2); - } - } -} - - -void luaK_fixline (FuncState *fs, int line) { - fs->f->lineinfo[fs->pc - 1] = line; -} - - -int luaK_code (FuncState *fs, Instruction i, int line) { - Proto *f = fs->f; - luaK_dischargejpc(fs); /* `pc' will change */ - /* put new instruction in code array */ - luaM_growvector(fs->L, f->code, fs->pc, f->sizecode, Instruction, - MAX_INT, "code size overflow"); - f->code[fs->pc] = i; - /* save corresponding line information */ - luaM_growvector(fs->L, f->lineinfo, fs->pc, f->sizelineinfo, int, - MAX_INT, "code size overflow"); - f->lineinfo[fs->pc] = line; - return fs->pc++; -} - - -int luaK_codeABC (FuncState *fs, OpCode o, int a, int b, int c) { - lua_assert(getOpMode(o) == iABC); - return luaK_code(fs, CREATE_ABC(o, a, b, c), fs->ls->lastline); -} - - -int luaK_codeABx (FuncState *fs, OpCode o, int a, unsigned int bc) { - lua_assert(getOpMode(o) == iABx || getOpMode(o) == iAsBx); - return luaK_code(fs, CREATE_ABx(o, a, bc), fs->ls->lastline); -} - +/*
+** $Id: lcode.c,v 1.3 2004-11-27 21:35:20 pixel Exp $
+** Code generator for Lua
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdlib.h>
+
+#define lcode_c
+
+#include "lua.h"
+
+#include "lcode.h"
+#include "ldebug.h"
+#include "ldo.h"
+#include "llex.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lparser.h"
+#include "ltable.h"
+
+
+#define hasjumps(e) ((e)->t != (e)->f)
+
+
+void luaK_nil (FuncState *fs, int from, int n) {
+ Instruction *previous;
+ if (fs->pc > fs->lasttarget && /* no jumps to current position? */
+ GET_OPCODE(*(previous = &fs->f->code[fs->pc-1])) == OP_LOADNIL) {
+ int pfrom = GETARG_A(*previous);
+ int pto = GETARG_B(*previous);
+ if (pfrom <= from && from <= pto+1) { /* can connect both? */
+ if (from+n-1 > pto)
+ SETARG_B(*previous, from+n-1);
+ return;
+ }
+ }
+ luaK_codeABC(fs, OP_LOADNIL, from, from+n-1, 0); /* else no optimization */
+}
+
+
+int luaK_jump (FuncState *fs) {
+ int jpc = fs->jpc; /* save list of jumps to here */
+ int j;
+ fs->jpc = NO_JUMP;
+ j = luaK_codeAsBx(fs, OP_JMP, 0, NO_JUMP);
+ luaK_concat(fs, &j, jpc); /* keep them on hold */
+ return j;
+}
+
+
+static int luaK_condjump (FuncState *fs, OpCode op, int A, int B, int C) {
+ luaK_codeABC(fs, op, A, B, C);
+ return luaK_jump(fs);
+}
+
+
+static void luaK_fixjump (FuncState *fs, int pc, int dest) {
+ Instruction *jmp = &fs->f->code[pc];
+ int offset = dest-(pc+1);
+ lua_assert(dest != NO_JUMP);
+ if (abs(offset) > MAXARG_sBx)
+ luaX_syntaxerror(fs->ls, "control structure too long");
+ SETARG_sBx(*jmp, offset);
+}
+
+
+/*
+** returns current `pc' and marks it as a jump target (to avoid wrong
+** optimizations with consecutive instructions not in the same basic block).
+*/
+int luaK_getlabel (FuncState *fs) {
+ fs->lasttarget = fs->pc;
+ return fs->pc;
+}
+
+
+static int luaK_getjump (FuncState *fs, int pc) {
+ int offset = GETARG_sBx(fs->f->code[pc]);
+ if (offset == NO_JUMP) /* point to itself represents end of list */
+ return NO_JUMP; /* end of list */
+ else
+ return (pc+1)+offset; /* turn offset into absolute position */
+}
+
+
+static Instruction *getjumpcontrol (FuncState *fs, int pc) {
+ Instruction *pi = &fs->f->code[pc];
+ if (pc >= 1 && testOpMode(GET_OPCODE(*(pi-1)), OpModeT))
+ return pi-1;
+ else
+ return pi;
+}
+
+
+/*
+** check whether list has any jump that do not produce a value
+** (or produce an inverted value)
+*/
+static int need_value (FuncState *fs, int list, int cond) {
+ for (; list != NO_JUMP; list = luaK_getjump(fs, list)) {
+ Instruction i = *getjumpcontrol(fs, list);
+ if (GET_OPCODE(i) != OP_TEST || GETARG_C(i) != cond) return 1;
+ }
+ return 0; /* not found */
+}
+
+
+static void patchtestreg (Instruction *i, int reg) {
+ if (reg == NO_REG) reg = GETARG_B(*i);
+ SETARG_A(*i, reg);
+}
+
+
+static void luaK_patchlistaux (FuncState *fs, int list,
+ int ttarget, int treg, int ftarget, int freg, int dtarget) {
+ while (list != NO_JUMP) {
+ int next = luaK_getjump(fs, list);
+ Instruction *i = getjumpcontrol(fs, list);
+ if (GET_OPCODE(*i) != OP_TEST) {
+ lua_assert(dtarget != NO_JUMP);
+ luaK_fixjump(fs, list, dtarget); /* jump to default target */
+ }
+ else {
+ if (GETARG_C(*i)) {
+ lua_assert(ttarget != NO_JUMP);
+ patchtestreg(i, treg);
+ luaK_fixjump(fs, list, ttarget);
+ }
+ else {
+ lua_assert(ftarget != NO_JUMP);
+ patchtestreg(i, freg);
+ luaK_fixjump(fs, list, ftarget);
+ }
+ }
+ list = next;
+ }
+}
+
+
+static void luaK_dischargejpc (FuncState *fs) {
+ luaK_patchlistaux(fs, fs->jpc, fs->pc, NO_REG, fs->pc, NO_REG, fs->pc);
+ fs->jpc = NO_JUMP;
+}
+
+
+void luaK_patchlist (FuncState *fs, int list, int target) {
+ if (target == fs->pc)
+ luaK_patchtohere(fs, list);
+ else {
+ lua_assert(target < fs->pc);
+ luaK_patchlistaux(fs, list, target, NO_REG, target, NO_REG, target);
+ }
+}
+
+
+void luaK_patchtohere (FuncState *fs, int list) {
+ luaK_getlabel(fs);
+ luaK_concat(fs, &fs->jpc, list);
+}
+
+
+void luaK_concat (FuncState *fs, int *l1, int l2) {
+ if (l2 == NO_JUMP) return;
+ else if (*l1 == NO_JUMP)
+ *l1 = l2;
+ else {
+ int list = *l1;
+ int next;
+ while ((next = luaK_getjump(fs, list)) != NO_JUMP) /* find last element */
+ list = next;
+ luaK_fixjump(fs, list, l2);
+ }
+}
+
+
+void luaK_checkstack (FuncState *fs, int n) {
+ int newstack = fs->freereg + n;
+ if (newstack > fs->f->maxstacksize) {
+ if (newstack >= MAXSTACK)
+ luaX_syntaxerror(fs->ls, "function or expression too complex");
+ fs->f->maxstacksize = cast(lu_byte, newstack);
+ }
+}
+
+
+void luaK_reserveregs (FuncState *fs, int n) {
+ luaK_checkstack(fs, n);
+ fs->freereg += n;
+}
+
+
+static void freereg (FuncState *fs, int reg) {
+ if (reg >= fs->nactvar && reg < MAXSTACK) {
+ fs->freereg--;
+ lua_assert(reg == fs->freereg);
+ }
+}
+
+
+static void freeexp (FuncState *fs, expdesc *e) {
+ if (e->k == VNONRELOC)
+ freereg(fs, e->info);
+}
+
+
+static int addk (FuncState *fs, TObject *k, TObject *v) {
+ const TObject *idx = luaH_get(fs->h, k);
+ if (ttisnumber(idx)) {
+ lua_assert(luaO_rawequalObj(&fs->f->k[cast(int, nvalue(idx))], v));
+ return cast(int, nvalue(idx));
+ }
+ else { /* constant not found; create a new entry */
+ Proto *f = fs->f;
+ luaM_growvector(fs->L, f->k, fs->nk, f->sizek, TObject,
+ MAXARG_Bx, "constant table overflow");
+ setobj2n(&f->k[fs->nk], v);
+ setnvalue(luaH_set(fs->L, fs->h, k), cast(lua_Number, fs->nk));
+ return fs->nk++;
+ }
+}
+
+
+int luaK_stringK (FuncState *fs, TString *s) {
+ TObject o;
+ setsvalue(&o, s);
+ return addk(fs, &o, &o);
+}
+
+
+int luaK_numberK (FuncState *fs, lua_Number r) {
+ TObject o;
+ setnvalue(&o, r);
+ return addk(fs, &o, &o);
+}
+
+
+static int nil_constant (FuncState *fs) {
+ TObject k, v;
+ setnilvalue(&v);
+ sethvalue(&k, fs->h); /* cannot use nil as key; instead use table itself */
+ return addk(fs, &k, &v);
+}
+
+
+void luaK_setcallreturns (FuncState *fs, expdesc *e, int nresults) {
+ if (e->k == VCALL) { /* expression is an open function call? */
+ SETARG_C(getcode(fs, e), nresults+1);
+ if (nresults == 1) { /* `regular' expression? */
+ e->k = VNONRELOC;
+ e->info = GETARG_A(getcode(fs, e));
+ }
+ }
+}
+
+
+void luaK_dischargevars (FuncState *fs, expdesc *e) {
+ switch (e->k) {
+ case VLOCAL: {
+ e->k = VNONRELOC;
+ break;
+ }
+ case VUPVAL: {
+ e->info = luaK_codeABC(fs, OP_GETUPVAL, 0, e->info, 0);
+ e->k = VRELOCABLE;
+ break;
+ }
+ case VGLOBAL: {
+ e->info = luaK_codeABx(fs, OP_GETGLOBAL, 0, e->info);
+ e->k = VRELOCABLE;
+ break;
+ }
+ case VINDEXED: {
+ freereg(fs, e->aux);
+ freereg(fs, e->info);
+ e->info = luaK_codeABC(fs, OP_GETTABLE, 0, e->info, e->aux);
+ e->k = VRELOCABLE;
+ break;
+ }
+ case VCALL: {
+ luaK_setcallreturns(fs, e, 1);
+ break;
+ }
+ default: break; /* there is one value available (somewhere) */
+ }
+}
+
+
+static int code_label (FuncState *fs, int A, int b, int jump) {
+ luaK_getlabel(fs); /* those instructions may be jump targets */
+ return luaK_codeABC(fs, OP_LOADBOOL, A, b, jump);
+}
+
+
+static void discharge2reg (FuncState *fs, expdesc *e, int reg) {
+ luaK_dischargevars(fs, e);
+ switch (e->k) {
+ case VNIL: {
+ luaK_nil(fs, reg, 1);
+ break;
+ }
+ case VFALSE: case VTRUE: {
+ luaK_codeABC(fs, OP_LOADBOOL, reg, e->k == VTRUE, 0);
+ break;
+ }
+ case VK: {
+ luaK_codeABx(fs, OP_LOADK, reg, e->info);
+ break;
+ }
+ case VRELOCABLE: {
+ Instruction *pc = &getcode(fs, e);
+ SETARG_A(*pc, reg);
+ break;
+ }
+ case VNONRELOC: {
+ if (reg != e->info)
+ luaK_codeABC(fs, OP_MOVE, reg, e->info, 0);
+ break;
+ }
+ default: {
+ lua_assert(e->k == VVOID || e->k == VJMP);
+ return; /* nothing to do... */
+ }
+ }
+ e->info = reg;
+ e->k = VNONRELOC;
+}
+
+
+static void discharge2anyreg (FuncState *fs, expdesc *e) {
+ if (e->k != VNONRELOC) {
+ luaK_reserveregs(fs, 1);
+ discharge2reg(fs, e, fs->freereg-1);
+ }
+}
+
+
+static void luaK_exp2reg (FuncState *fs, expdesc *e, int reg) {
+ discharge2reg(fs, e, reg);
+ if (e->k == VJMP)
+ luaK_concat(fs, &e->t, e->info); /* put this jump in `t' list */
+ if (hasjumps(e)) {
+ int final; /* position after whole expression */
+ int p_f = NO_JUMP; /* position of an eventual LOAD false */
+ int p_t = NO_JUMP; /* position of an eventual LOAD true */
+ if (need_value(fs, e->t, 1) || need_value(fs, e->f, 0)) {
+ int fj = NO_JUMP; /* first jump (over LOAD ops.) */
+ if (e->k != VJMP)
+ fj = luaK_jump(fs);
+ p_f = code_label(fs, reg, 0, 1);
+ p_t = code_label(fs, reg, 1, 0);
+ luaK_patchtohere(fs, fj);
+ }
+ final = luaK_getlabel(fs);
+ luaK_patchlistaux(fs, e->f, p_f, NO_REG, final, reg, p_f);
+ luaK_patchlistaux(fs, e->t, final, reg, p_t, NO_REG, p_t);
+ }
+ e->f = e->t = NO_JUMP;
+ e->info = reg;
+ e->k = VNONRELOC;
+}
+
+
+void luaK_exp2nextreg (FuncState *fs, expdesc *e) {
+ luaK_dischargevars(fs, e);
+ freeexp(fs, e);
+ luaK_reserveregs(fs, 1);
+ luaK_exp2reg(fs, e, fs->freereg - 1);
+}
+
+
+int luaK_exp2anyreg (FuncState *fs, expdesc *e) {
+ luaK_dischargevars(fs, e);
+ if (e->k == VNONRELOC) {
+ if (!hasjumps(e)) return e->info; /* exp is already in a register */
+ if (e->info >= fs->nactvar) { /* reg. is not a local? */
+ luaK_exp2reg(fs, e, e->info); /* put value on it */
+ return e->info;
+ }
+ }
+ luaK_exp2nextreg(fs, e); /* default */
+ return e->info;
+}
+
+
+void luaK_exp2val (FuncState *fs, expdesc *e) {
+ if (hasjumps(e))
+ luaK_exp2anyreg(fs, e);
+ else
+ luaK_dischargevars(fs, e);
+}
+
+
+int luaK_exp2RK (FuncState *fs, expdesc *e) {
+ luaK_exp2val(fs, e);
+ switch (e->k) {
+ case VNIL: {
+ if (fs->nk + MAXSTACK <= MAXARG_C) { /* constant fit in argC? */
+ e->info = nil_constant(fs);
+ e->k = VK;
+ return e->info + MAXSTACK;
+ }
+ else break;
+ }
+ case VK: {
+ if (e->info + MAXSTACK <= MAXARG_C) /* constant fit in argC? */
+ return e->info + MAXSTACK;
+ else break;
+ }
+ default: break;
+ }
+ /* not a constant in the right range: put it in a register */
+ return luaK_exp2anyreg(fs, e);
+}
+
+
+void luaK_storevar (FuncState *fs, expdesc *var, expdesc *exp) {
+ switch (var->k) {
+ case VLOCAL: {
+ freeexp(fs, exp);
+ luaK_exp2reg(fs, exp, var->info);
+ return;
+ }
+ case VUPVAL: {
+ int e = luaK_exp2anyreg(fs, exp);
+ luaK_codeABC(fs, OP_SETUPVAL, e, var->info, 0);
+ break;
+ }
+ case VGLOBAL: {
+ int e = luaK_exp2anyreg(fs, exp);
+ luaK_codeABx(fs, OP_SETGLOBAL, e, var->info);
+ break;
+ }
+ case VINDEXED: {
+ int e = luaK_exp2RK(fs, exp);
+ luaK_codeABC(fs, OP_SETTABLE, var->info, var->aux, e);
+ break;
+ }
+ default: {
+ lua_assert(0); /* invalid var kind to store */
+ break;
+ }
+ }
+ freeexp(fs, exp);
+}
+
+
+void luaK_self (FuncState *fs, expdesc *e, expdesc *key) {
+ int func;
+ luaK_exp2anyreg(fs, e);
+ freeexp(fs, e);
+ func = fs->freereg;
+ luaK_reserveregs(fs, 2);
+ luaK_codeABC(fs, OP_SELF, func, e->info, luaK_exp2RK(fs, key));
+ freeexp(fs, key);
+ e->info = func;
+ e->k = VNONRELOC;
+}
+
+
+static void invertjump (FuncState *fs, expdesc *e) {
+ Instruction *pc = getjumpcontrol(fs, e->info);
+ lua_assert(testOpMode(GET_OPCODE(*pc), OpModeT) &&
+ GET_OPCODE(*pc) != OP_TEST);
+ SETARG_A(*pc, !(GETARG_A(*pc)));
+}
+
+
+static int jumponcond (FuncState *fs, expdesc *e, int cond) {
+ if (e->k == VRELOCABLE) {
+ Instruction ie = getcode(fs, e);
+ if (GET_OPCODE(ie) == OP_NOT) {
+ fs->pc--; /* remove previous OP_NOT */
+ return luaK_condjump(fs, OP_TEST, NO_REG, GETARG_B(ie), !cond);
+ }
+ /* else go through */
+ }
+ discharge2anyreg(fs, e);
+ freeexp(fs, e);
+ return luaK_condjump(fs, OP_TEST, NO_REG, e->info, cond);
+}
+
+
+void luaK_goiftrue (FuncState *fs, expdesc *e) {
+ int pc; /* pc of last jump */
+ luaK_dischargevars(fs, e);
+ switch (e->k) {
+ case VK: case VTRUE: {
+ pc = NO_JUMP; /* always true; do nothing */
+ break;
+ }
+ case VFALSE: {
+ pc = luaK_jump(fs); /* always jump */
+ break;
+ }
+ case VJMP: {
+ invertjump(fs, e);
+ pc = e->info;
+ break;
+ }
+ default: {
+ pc = jumponcond(fs, e, 0);
+ break;
+ }
+ }
+ luaK_concat(fs, &e->f, pc); /* insert last jump in `f' list */
+}
+
+
+void luaK_goiffalse (FuncState *fs, expdesc *e) {
+ int pc; /* pc of last jump */
+ luaK_dischargevars(fs, e);
+ switch (e->k) {
+ case VNIL: case VFALSE: {
+ pc = NO_JUMP; /* always false; do nothing */
+ break;
+ }
+ case VTRUE: {
+ pc = luaK_jump(fs); /* always jump */
+ break;
+ }
+ case VJMP: {
+ pc = e->info;
+ break;
+ }
+ default: {
+ pc = jumponcond(fs, e, 1);
+ break;
+ }
+ }
+ luaK_concat(fs, &e->t, pc); /* insert last jump in `t' list */
+}
+
+
+static void codenot (FuncState *fs, expdesc *e) {
+ luaK_dischargevars(fs, e);
+ switch (e->k) {
+ case VNIL: case VFALSE: {
+ e->k = VTRUE;
+ break;
+ }
+ case VK: case VTRUE: {
+ e->k = VFALSE;
+ break;
+ }
+ case VJMP: {
+ invertjump(fs, e);
+ break;
+ }
+ case VRELOCABLE:
+ case VNONRELOC: {
+ discharge2anyreg(fs, e);
+ freeexp(fs, e);
+ e->info = luaK_codeABC(fs, OP_NOT, 0, e->info, 0);
+ e->k = VRELOCABLE;
+ break;
+ }
+ default: {
+ lua_assert(0); /* cannot happen */
+ break;
+ }
+ }
+ /* interchange true and false lists */
+ { int temp = e->f; e->f = e->t; e->t = temp; }
+}
+
+
+void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k) {
+ t->aux = luaK_exp2RK(fs, k);
+ t->k = VINDEXED;
+}
+
+
+void luaK_prefix (FuncState *fs, UnOpr op, expdesc *e) {
+ if (op == OPR_MINUS) {
+ luaK_exp2val(fs, e);
+ if (e->k == VK && ttisnumber(&fs->f->k[e->info]))
+ e->info = luaK_numberK(fs, -nvalue(&fs->f->k[e->info]));
+ else {
+ luaK_exp2anyreg(fs, e);
+ freeexp(fs, e);
+ e->info = luaK_codeABC(fs, OP_UNM, 0, e->info, 0);
+ e->k = VRELOCABLE;
+ }
+ }
+ else /* op == NOT */
+ codenot(fs, e);
+}
+
+
+void luaK_infix (FuncState *fs, BinOpr op, expdesc *v) {
+ switch (op) {
+ case OPR_AND: {
+ luaK_goiftrue(fs, v);
+ luaK_patchtohere(fs, v->t);
+ v->t = NO_JUMP;
+ break;
+ }
+ case OPR_OR: {
+ luaK_goiffalse(fs, v);
+ luaK_patchtohere(fs, v->f);
+ v->f = NO_JUMP;
+ break;
+ }
+ case OPR_CONCAT: {
+ luaK_exp2nextreg(fs, v); /* operand must be on the `stack' */
+ break;
+ }
+ default: {
+ luaK_exp2RK(fs, v);
+ break;
+ }
+ }
+}
+
+
+static void codebinop (FuncState *fs, expdesc *res, BinOpr op,
+ int o1, int o2) {
+ if (op <= OPR_POW) { /* arithmetic operator? */
+ OpCode opc = cast(OpCode, (op - OPR_ADD) + OP_ADD); /* ORDER OP */
+ res->info = luaK_codeABC(fs, opc, 0, o1, o2);
+ res->k = VRELOCABLE;
+ }
+ else { /* test operator */
+ static const OpCode ops[] = {OP_EQ, OP_EQ, OP_LT, OP_LE, OP_LT, OP_LE};
+ int cond = 1;
+ if (op >= OPR_GT) { /* `>' or `>='? */
+ int temp; /* exchange args and replace by `<' or `<=' */
+ temp = o1; o1 = o2; o2 = temp; /* o1 <==> o2 */
+ }
+ else if (op == OPR_NE) cond = 0;
+ res->info = luaK_condjump(fs, ops[op - OPR_NE], cond, o1, o2);
+ res->k = VJMP;
+ }
+}
+
+
+void luaK_posfix (FuncState *fs, BinOpr op, expdesc *e1, expdesc *e2) {
+ switch (op) {
+ case OPR_AND: {
+ lua_assert(e1->t == NO_JUMP); /* list must be closed */
+ luaK_dischargevars(fs, e2);
+ luaK_concat(fs, &e1->f, e2->f);
+ e1->k = e2->k; e1->info = e2->info; e1->aux = e2->aux; e1->t = e2->t;
+ break;
+ }
+ case OPR_OR: {
+ lua_assert(e1->f == NO_JUMP); /* list must be closed */
+ luaK_dischargevars(fs, e2);
+ luaK_concat(fs, &e1->t, e2->t);
+ e1->k = e2->k; e1->info = e2->info; e1->aux = e2->aux; e1->f = e2->f;
+ break;
+ }
+ case OPR_CONCAT: {
+ luaK_exp2val(fs, e2);
+ if (e2->k == VRELOCABLE && GET_OPCODE(getcode(fs, e2)) == OP_CONCAT) {
+ lua_assert(e1->info == GETARG_B(getcode(fs, e2))-1);
+ freeexp(fs, e1);
+ SETARG_B(getcode(fs, e2), e1->info);
+ e1->k = e2->k; e1->info = e2->info;
+ }
+ else {
+ luaK_exp2nextreg(fs, e2);
+ freeexp(fs, e2);
+ freeexp(fs, e1);
+ e1->info = luaK_codeABC(fs, OP_CONCAT, 0, e1->info, e2->info);
+ e1->k = VRELOCABLE;
+ }
+ break;
+ }
+ default: {
+ int o1 = luaK_exp2RK(fs, e1);
+ int o2 = luaK_exp2RK(fs, e2);
+ freeexp(fs, e2);
+ freeexp(fs, e1);
+ codebinop(fs, e1, op, o1, o2);
+ }
+ }
+}
+
+
+void luaK_fixline (FuncState *fs, int line) {
+ fs->f->lineinfo[fs->pc - 1] = line;
+}
+
+
+int luaK_code (FuncState *fs, Instruction i, int line) {
+ Proto *f = fs->f;
+ luaK_dischargejpc(fs); /* `pc' will change */
+ /* put new instruction in code array */
+ luaM_growvector(fs->L, f->code, fs->pc, f->sizecode, Instruction,
+ MAX_INT, "code size overflow");
+ f->code[fs->pc] = i;
+ /* save corresponding line information */
+ luaM_growvector(fs->L, f->lineinfo, fs->pc, f->sizelineinfo, int,
+ MAX_INT, "code size overflow");
+ f->lineinfo[fs->pc] = line;
+ return fs->pc++;
+}
+
+
+int luaK_codeABC (FuncState *fs, OpCode o, int a, int b, int c) {
+ lua_assert(getOpMode(o) == iABC);
+ return luaK_code(fs, CREATE_ABC(o, a, b, c), fs->ls->lastline);
+}
+
+
+int luaK_codeABx (FuncState *fs, OpCode o, int a, unsigned int bc) {
+ lua_assert(getOpMode(o) == iABx || getOpMode(o) == iAsBx);
+ return luaK_code(fs, CREATE_ABx(o, a, bc), fs->ls->lastline);
+}
+
diff --git a/lib/lua/src/ldebug.c b/lib/lua/src/ldebug.c index c78ca4f..0b8e987 100644 --- a/lib/lua/src/ldebug.c +++ b/lib/lua/src/ldebug.c @@ -1,585 +1,585 @@ -/* -** $Id: ldebug.c,v 1.2 2003-12-11 16:53:30 pixel Exp $ -** Debug Interface -** See Copyright Notice in lua.h -*/ - - -#include <stdlib.h> -#include <string.h> - -#define ldebug_c - -#include "lua.h" - -#include "lapi.h" -#include "lcode.h" -#include "ldebug.h" -#include "ldo.h" -#include "lfunc.h" -#include "lobject.h" -#include "lopcodes.h" -#include "lstate.h" -#include "lstring.h" -#include "ltable.h" -#include "ltm.h" -#include "lvm.h" - - - -static const char *getfuncname (CallInfo *ci, const char **name); - - -#define isLua(ci) (!((ci)->state & CI_C)) - - -static int currentpc (CallInfo *ci) { - if (!isLua(ci)) return -1; /* function is not a Lua function? */ - if (ci->state & CI_HASFRAME) /* function has a frame? */ - ci->u.l.savedpc = *ci->u.l.pc; /* use `pc' from there */ - /* function's pc is saved */ - return pcRel(ci->u.l.savedpc, ci_func(ci)->l.p); -} - - -static int currentline (CallInfo *ci) { - int pc = currentpc(ci); - if (pc < 0) - return -1; /* only active lua functions have current-line information */ - else - return getline(ci_func(ci)->l.p, pc); -} - - -void luaG_inithooks (lua_State *L) { - CallInfo *ci; - for (ci = L->ci; ci != L->base_ci; ci--) /* update all `savedpc's */ - currentpc(ci); - L->hookinit = 1; -} - - -/* -** this function can be called asynchronous (e.g. during a signal) -*/ -LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count) { - if (func == NULL || mask == 0) { /* turn off hooks? */ - mask = 0; - func = NULL; - } - L->hook = func; - L->basehookcount = count; - resethookcount(L); - L->hookmask = cast(lu_byte, mask); - L->hookinit = 0; - return 1; -} - - -LUA_API lua_Hook lua_gethook (lua_State *L) { - return L->hook; -} - - -LUA_API int lua_gethookmask (lua_State *L) { - return L->hookmask; -} - - -LUA_API int lua_gethookcount (lua_State *L) { - return L->basehookcount; -} - - -LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) { - int status; - CallInfo *ci; - lua_lock(L); - for (ci = L->ci; level > 0 && ci > L->base_ci; ci--) { - level--; - if (!(ci->state & CI_C)) /* Lua function? */ - level -= ci->u.l.tailcalls; /* skip lost tail calls */ - } - if (level > 0 || ci == L->base_ci) status = 0; /* there is no such level */ - else if (level < 0) { /* level is of a lost tail call */ - status = 1; - ar->i_ci = 0; - } - else { - status = 1; - ar->i_ci = ci - L->base_ci; - } - lua_unlock(L); - return status; -} - - -static Proto *getluaproto (CallInfo *ci) { - return (isLua(ci) ? ci_func(ci)->l.p : NULL); -} - - -LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) { - const char *name; - CallInfo *ci; - Proto *fp; - lua_lock(L); - name = NULL; - ci = L->base_ci + ar->i_ci; - fp = getluaproto(ci); - if (fp) { /* is a Lua function? */ - name = luaF_getlocalname(fp, n, currentpc(ci)); - if (name) - luaA_pushobject(L, ci->base+(n-1)); /* push value */ - } - lua_unlock(L); - return name; -} - - -LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) { - const char *name; - CallInfo *ci; - Proto *fp; - lua_lock(L); - name = NULL; - ci = L->base_ci + ar->i_ci; - fp = getluaproto(ci); - L->top--; /* pop new value */ - if (fp) { /* is a Lua function? */ - name = luaF_getlocalname(fp, n, currentpc(ci)); - if (!name || name[0] == '(') /* `(' starts private locals */ - name = NULL; - else - setobjs2s(ci->base+(n-1), L->top); - } - lua_unlock(L); - return name; -} - - -static void funcinfo (lua_Debug *ar, StkId func) { - Closure *cl = clvalue(func); - if (cl->c.isC) { - ar->source = "=[C]"; - ar->linedefined = -1; - ar->what = "C"; - } - else { - ar->source = getstr(cl->l.p->source); - ar->linedefined = cl->l.p->lineDefined; - ar->what = (ar->linedefined == 0) ? "main" : "Lua"; - } - luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE); -} - - -static const char *travglobals (lua_State *L, const TObject *o) { - Table *g = hvalue(gt(L)); - int i = sizenode(g); - while (i--) { - Node *n = gnode(g, i); - if (luaO_rawequalObj(o, gval(n)) && ttisstring(gkey(n))) - return getstr(tsvalue(gkey(n))); - } - return NULL; -} - - -static void info_tailcall (lua_State *L, lua_Debug *ar) { - ar->name = ar->namewhat = ""; - ar->what = "tail"; - ar->linedefined = ar->currentline = -1; - ar->source = "=(tail call)"; - luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE); - ar->nups = 0; - setnilvalue(L->top); -} - - -static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar, - StkId f, CallInfo *ci) { - int status = 1; - for (; *what; what++) { - switch (*what) { - case 'S': { - funcinfo(ar, f); - break; - } - case 'l': { - ar->currentline = (ci) ? currentline(ci) : -1; - break; - } - case 'u': { - ar->nups = clvalue(f)->c.nupvalues; - break; - } - case 'n': { - ar->namewhat = (ci) ? getfuncname(ci, &ar->name) : NULL; - if (ar->namewhat == NULL) { - /* try to find a global name */ - if ((ar->name = travglobals(L, f)) != NULL) - ar->namewhat = "global"; - else ar->namewhat = ""; /* not found */ - } - break; - } - case 'f': { - setobj2s(L->top, f); - break; - } - default: status = 0; /* invalid option */ - } - } - return status; -} - - -LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) { - int status = 1; - lua_lock(L); - if (*what == '>') { - StkId f = L->top - 1; - if (!ttisfunction(f)) - luaG_runerror(L, "value for `lua_getinfo' is not a function"); - status = auxgetinfo(L, what + 1, ar, f, NULL); - L->top--; /* pop function */ - } - else if (ar->i_ci != 0) { /* no tail call? */ - CallInfo *ci = L->base_ci + ar->i_ci; - lua_assert(ttisfunction(ci->base - 1)); - status = auxgetinfo(L, what, ar, ci->base - 1, ci); - } - else - info_tailcall(L, ar); - if (strchr(what, 'f')) incr_top(L); - lua_unlock(L); - return status; -} - - -/* -** {====================================================== -** Symbolic Execution and code checker -** ======================================================= -*/ - -#define check(x) if (!(x)) return 0; - -#define checkjump(pt,pc) check(0 <= pc && pc < pt->sizecode) - -#define checkreg(pt,reg) check((reg) < (pt)->maxstacksize) - - - -static int precheck (const Proto *pt) { - check(pt->maxstacksize <= MAXSTACK); - check(pt->sizelineinfo == pt->sizecode || pt->sizelineinfo == 0); - lua_assert(pt->numparams+pt->is_vararg <= pt->maxstacksize); - check(GET_OPCODE(pt->code[pt->sizecode-1]) == OP_RETURN); - return 1; -} - - -static int checkopenop (const Proto *pt, int pc) { - Instruction i = pt->code[pc+1]; - switch (GET_OPCODE(i)) { - case OP_CALL: - case OP_TAILCALL: - case OP_RETURN: { - check(GETARG_B(i) == 0); - return 1; - } - case OP_SETLISTO: return 1; - default: return 0; /* invalid instruction after an open call */ - } -} - - -static int checkRK (const Proto *pt, int r) { - return (r < pt->maxstacksize || (r >= MAXSTACK && r-MAXSTACK < pt->sizek)); -} - - -static Instruction luaG_symbexec (const Proto *pt, int lastpc, int reg) { - int pc; - int last; /* stores position of last instruction that changed `reg' */ - last = pt->sizecode-1; /* points to final return (a `neutral' instruction) */ - check(precheck(pt)); - for (pc = 0; pc < lastpc; pc++) { - const Instruction i = pt->code[pc]; - OpCode op = GET_OPCODE(i); - int a = GETARG_A(i); - int b = 0; - int c = 0; - checkreg(pt, a); - switch (getOpMode(op)) { - case iABC: { - b = GETARG_B(i); - c = GETARG_C(i); - if (testOpMode(op, OpModeBreg)) { - checkreg(pt, b); - } - else if (testOpMode(op, OpModeBrk)) - check(checkRK(pt, b)); - if (testOpMode(op, OpModeCrk)) - check(checkRK(pt, c)); - break; - } - case iABx: { - b = GETARG_Bx(i); - if (testOpMode(op, OpModeK)) check(b < pt->sizek); - break; - } - case iAsBx: { - b = GETARG_sBx(i); - break; - } - } - if (testOpMode(op, OpModesetA)) { - if (a == reg) last = pc; /* change register `a' */ - } - if (testOpMode(op, OpModeT)) { - check(pc+2 < pt->sizecode); /* check skip */ - check(GET_OPCODE(pt->code[pc+1]) == OP_JMP); - } - switch (op) { - case OP_LOADBOOL: { - check(c == 0 || pc+2 < pt->sizecode); /* check its jump */ - break; - } - case OP_LOADNIL: { - if (a <= reg && reg <= b) - last = pc; /* set registers from `a' to `b' */ - break; - } - case OP_GETUPVAL: - case OP_SETUPVAL: { - check(b < pt->nups); - break; - } - case OP_GETGLOBAL: - case OP_SETGLOBAL: { - check(ttisstring(&pt->k[b])); - break; - } - case OP_SELF: { - checkreg(pt, a+1); - if (reg == a+1) last = pc; - break; - } - case OP_CONCAT: { - /* `c' is a register, and at least two operands */ - check(c < MAXSTACK && b < c); - break; - } - case OP_TFORLOOP: - checkreg(pt, a+c+5); - if (reg >= a) last = pc; /* affect all registers above base */ - /* go through */ - case OP_FORLOOP: - checkreg(pt, a+2); - /* go through */ - case OP_JMP: { - int dest = pc+1+b; - check(0 <= dest && dest < pt->sizecode); - /* not full check and jump is forward and do not skip `lastpc'? */ - if (reg != NO_REG && pc < dest && dest <= lastpc) - pc += b; /* do the jump */ - break; - } - case OP_CALL: - case OP_TAILCALL: { - if (b != 0) { - checkreg(pt, a+b-1); - } - c--; /* c = num. returns */ - if (c == LUA_MULTRET) { - check(checkopenop(pt, pc)); - } - else if (c != 0) - checkreg(pt, a+c-1); - if (reg >= a) last = pc; /* affect all registers above base */ - break; - } - case OP_RETURN: { - b--; /* b = num. returns */ - if (b > 0) checkreg(pt, a+b-1); - break; - } - case OP_SETLIST: { - checkreg(pt, a + (b&(LFIELDS_PER_FLUSH-1)) + 1); - break; - } - case OP_CLOSURE: { - int nup; - check(b < pt->sizep); - nup = pt->p[b]->nups; - check(pc + nup < pt->sizecode); - for (; nup>0; nup--) { - OpCode op1 = GET_OPCODE(pt->code[pc+nup]); - check(op1 == OP_GETUPVAL || op1 == OP_MOVE); - } - break; - } - default: break; - } - } - return pt->code[last]; -} - -#undef check -#undef checkjump -#undef checkreg - -/* }====================================================== */ - - -int luaG_checkcode (const Proto *pt) { - return luaG_symbexec(pt, pt->sizecode, NO_REG); -} - - -static const char *kname (Proto *p, int c) { - c = c - MAXSTACK; - if (c >= 0 && ttisstring(&p->k[c])) - return svalue(&p->k[c]); - else - return "?"; -} - - -static const char *getobjname (CallInfo *ci, int stackpos, const char **name) { - if (isLua(ci)) { /* a Lua function? */ - Proto *p = ci_func(ci)->l.p; - int pc = currentpc(ci); - Instruction i; - *name = luaF_getlocalname(p, stackpos+1, pc); - if (*name) /* is a local? */ - return "local"; - i = luaG_symbexec(p, pc, stackpos); /* try symbolic execution */ - lua_assert(pc != -1); - switch (GET_OPCODE(i)) { - case OP_GETGLOBAL: { - int g = GETARG_Bx(i); /* global index */ - lua_assert(ttisstring(&p->k[g])); - *name = svalue(&p->k[g]); - return "global"; - } - case OP_MOVE: { - int a = GETARG_A(i); - int b = GETARG_B(i); /* move from `b' to `a' */ - if (b < a) - return getobjname(ci, b, name); /* get name for `b' */ - break; - } - case OP_GETTABLE: { - int k = GETARG_C(i); /* key index */ - *name = kname(p, k); - return "field"; - } - case OP_SELF: { - int k = GETARG_C(i); /* key index */ - *name = kname(p, k); - return "method"; - } - default: break; - } - } - return NULL; /* no useful name found */ -} - - -static const char *getfuncname (CallInfo *ci, const char **name) { - Instruction i; - if ((isLua(ci) && ci->u.l.tailcalls > 0) || !isLua(ci - 1)) - return NULL; /* calling function is not Lua (or is unknown) */ - ci--; /* calling function */ - i = ci_func(ci)->l.p->code[currentpc(ci)]; - if (GET_OPCODE(i) == OP_CALL || GET_OPCODE(i) == OP_TAILCALL) - return getobjname(ci, GETARG_A(i), name); - else - return NULL; /* no useful name can be found */ -} - - -/* only ANSI way to check whether a pointer points to an array */ -static int isinstack (CallInfo *ci, const TObject *o) { - StkId p; - for (p = ci->base; p < ci->top; p++) - if (o == p) return 1; - return 0; -} - - -void luaG_typeerror (lua_State *L, const TObject *o, const char *op) { - const char *name = NULL; - const char *t = luaT_typenames[ttype(o)]; - const char *kind = (isinstack(L->ci, o)) ? - getobjname(L->ci, o - L->base, &name) : NULL; - if (kind) - luaG_runerror(L, "attempt to %s %s `%s' (a %s value)", - op, kind, name, t); - else - luaG_runerror(L, "attempt to %s a %s value", op, t); -} - - -void luaG_concaterror (lua_State *L, StkId p1, StkId p2) { - if (ttisstring(p1)) p1 = p2; - lua_assert(!ttisstring(p1)); - luaG_typeerror(L, p1, "concatenate"); -} - - -void luaG_aritherror (lua_State *L, const TObject *p1, const TObject *p2) { - TObject temp; - if (luaV_tonumber(p1, &temp) == NULL) - p2 = p1; /* first operand is wrong */ - luaG_typeerror(L, p2, "perform arithmetic on"); -} - - -int luaG_ordererror (lua_State *L, const TObject *p1, const TObject *p2) { - const char *t1 = luaT_typenames[ttype(p1)]; - const char *t2 = luaT_typenames[ttype(p2)]; - if (t1[2] == t2[2]) - luaG_runerror(L, "attempt to compare two %s values", t1); - else - luaG_runerror(L, "attempt to compare %s with %s", t1, t2); - return 0; -} - - -static void addinfo (lua_State *L, const char *msg) { - CallInfo *ci = L->ci; - if (isLua(ci)) { /* is Lua code? */ - char buff[LUA_IDSIZE]; /* add file:line information */ - int line = currentline(ci); - luaO_chunkid(buff, getstr(getluaproto(ci)->source), LUA_IDSIZE); - luaO_pushfstring(L, "%s:%d: %s", buff, line, msg); - } -} - - -void luaG_errormsg (lua_State *L) { - if (L->errfunc != 0) { /* is there an error handling function? */ - StkId errfunc = restorestack(L, L->errfunc); - if (!ttisfunction(errfunc)) luaD_throw(L, LUA_ERRERR); - setobjs2s(L->top, L->top - 1); /* move argument */ - setobjs2s(L->top - 1, errfunc); /* push function */ - incr_top(L); - luaD_call(L, L->top - 2, 1); /* call it */ - } - luaD_throw(L, LUA_ERRRUN); -} - - -void luaG_runerror (lua_State *L, const char *fmt, ...) { - va_list argp; - va_start(argp, fmt); - addinfo(L, luaO_pushvfstring(L, fmt, argp)); - va_end(argp); - luaG_errormsg(L); -} - +/*
+** $Id: ldebug.c,v 1.3 2004-11-27 21:35:20 pixel Exp $
+** Debug Interface
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdlib.h>
+#include <string.h>
+
+#define ldebug_c
+
+#include "lua.h"
+
+#include "lapi.h"
+#include "lcode.h"
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+#include "lvm.h"
+
+
+
+static const char *getfuncname (CallInfo *ci, const char **name);
+
+
+#define isLua(ci) (!((ci)->state & CI_C))
+
+
+static int currentpc (CallInfo *ci) {
+ if (!isLua(ci)) return -1; /* function is not a Lua function? */
+ if (ci->state & CI_HASFRAME) /* function has a frame? */
+ ci->u.l.savedpc = *ci->u.l.pc; /* use `pc' from there */
+ /* function's pc is saved */
+ return pcRel(ci->u.l.savedpc, ci_func(ci)->l.p);
+}
+
+
+static int currentline (CallInfo *ci) {
+ int pc = currentpc(ci);
+ if (pc < 0)
+ return -1; /* only active lua functions have current-line information */
+ else
+ return getline(ci_func(ci)->l.p, pc);
+}
+
+
+void luaG_inithooks (lua_State *L) {
+ CallInfo *ci;
+ for (ci = L->ci; ci != L->base_ci; ci--) /* update all `savedpc's */
+ currentpc(ci);
+ L->hookinit = 1;
+}
+
+
+/*
+** this function can be called asynchronous (e.g. during a signal)
+*/
+LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
+ if (func == NULL || mask == 0) { /* turn off hooks? */
+ mask = 0;
+ func = NULL;
+ }
+ L->hook = func;
+ L->basehookcount = count;
+ resethookcount(L);
+ L->hookmask = cast(lu_byte, mask);
+ L->hookinit = 0;
+ return 1;
+}
+
+
+LUA_API lua_Hook lua_gethook (lua_State *L) {
+ return L->hook;
+}
+
+
+LUA_API int lua_gethookmask (lua_State *L) {
+ return L->hookmask;
+}
+
+
+LUA_API int lua_gethookcount (lua_State *L) {
+ return L->basehookcount;
+}
+
+
+LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
+ int status;
+ CallInfo *ci;
+ lua_lock(L);
+ for (ci = L->ci; level > 0 && ci > L->base_ci; ci--) {
+ level--;
+ if (!(ci->state & CI_C)) /* Lua function? */
+ level -= ci->u.l.tailcalls; /* skip lost tail calls */
+ }
+ if (level > 0 || ci == L->base_ci) status = 0; /* there is no such level */
+ else if (level < 0) { /* level is of a lost tail call */
+ status = 1;
+ ar->i_ci = 0;
+ }
+ else {
+ status = 1;
+ ar->i_ci = ci - L->base_ci;
+ }
+ lua_unlock(L);
+ return status;
+}
+
+
+static Proto *getluaproto (CallInfo *ci) {
+ return (isLua(ci) ? ci_func(ci)->l.p : NULL);
+}
+
+
+LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
+ const char *name;
+ CallInfo *ci;
+ Proto *fp;
+ lua_lock(L);
+ name = NULL;
+ ci = L->base_ci + ar->i_ci;
+ fp = getluaproto(ci);
+ if (fp) { /* is a Lua function? */
+ name = luaF_getlocalname(fp, n, currentpc(ci));
+ if (name)
+ luaA_pushobject(L, ci->base+(n-1)); /* push value */
+ }
+ lua_unlock(L);
+ return name;
+}
+
+
+LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
+ const char *name;
+ CallInfo *ci;
+ Proto *fp;
+ lua_lock(L);
+ name = NULL;
+ ci = L->base_ci + ar->i_ci;
+ fp = getluaproto(ci);
+ L->top--; /* pop new value */
+ if (fp) { /* is a Lua function? */
+ name = luaF_getlocalname(fp, n, currentpc(ci));
+ if (!name || name[0] == '(') /* `(' starts private locals */
+ name = NULL;
+ else
+ setobjs2s(ci->base+(n-1), L->top);
+ }
+ lua_unlock(L);
+ return name;
+}
+
+
+static void funcinfo (lua_Debug *ar, StkId func) {
+ Closure *cl = clvalue(func);
+ if (cl->c.isC) {
+ ar->source = "=[C]";
+ ar->linedefined = -1;
+ ar->what = "C";
+ }
+ else {
+ ar->source = getstr(cl->l.p->source);
+ ar->linedefined = cl->l.p->lineDefined;
+ ar->what = (ar->linedefined == 0) ? "main" : "Lua";
+ }
+ luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
+}
+
+
+static const char *travglobals (lua_State *L, const TObject *o) {
+ Table *g = hvalue(gt(L));
+ int i = sizenode(g);
+ while (i--) {
+ Node *n = gnode(g, i);
+ if (luaO_rawequalObj(o, gval(n)) && ttisstring(gkey(n)))
+ return getstr(tsvalue(gkey(n)));
+ }
+ return NULL;
+}
+
+
+static void info_tailcall (lua_State *L, lua_Debug *ar) {
+ ar->name = ar->namewhat = "";
+ ar->what = "tail";
+ ar->linedefined = ar->currentline = -1;
+ ar->source = "=(tail call)";
+ luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
+ ar->nups = 0;
+ setnilvalue(L->top);
+}
+
+
+static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
+ StkId f, CallInfo *ci) {
+ int status = 1;
+ for (; *what; what++) {
+ switch (*what) {
+ case 'S': {
+ funcinfo(ar, f);
+ break;
+ }
+ case 'l': {
+ ar->currentline = (ci) ? currentline(ci) : -1;
+ break;
+ }
+ case 'u': {
+ ar->nups = clvalue(f)->c.nupvalues;
+ break;
+ }
+ case 'n': {
+ ar->namewhat = (ci) ? getfuncname(ci, &ar->name) : NULL;
+ if (ar->namewhat == NULL) {
+ /* try to find a global name */
+ if ((ar->name = travglobals(L, f)) != NULL)
+ ar->namewhat = "global";
+ else ar->namewhat = ""; /* not found */
+ }
+ break;
+ }
+ case 'f': {
+ setobj2s(L->top, f);
+ break;
+ }
+ default: status = 0; /* invalid option */
+ }
+ }
+ return status;
+}
+
+
+LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
+ int status = 1;
+ lua_lock(L);
+ if (*what == '>') {
+ StkId f = L->top - 1;
+ if (!ttisfunction(f))
+ luaG_runerror(L, "value for `lua_getinfo' is not a function");
+ status = auxgetinfo(L, what + 1, ar, f, NULL);
+ L->top--; /* pop function */
+ }
+ else if (ar->i_ci != 0) { /* no tail call? */
+ CallInfo *ci = L->base_ci + ar->i_ci;
+ lua_assert(ttisfunction(ci->base - 1));
+ status = auxgetinfo(L, what, ar, ci->base - 1, ci);
+ }
+ else
+ info_tailcall(L, ar);
+ if (strchr(what, 'f')) incr_top(L);
+ lua_unlock(L);
+ return status;
+}
+
+
+/*
+** {======================================================
+** Symbolic Execution and code checker
+** =======================================================
+*/
+
+#define check(x) if (!(x)) return 0;
+
+#define checkjump(pt,pc) check(0 <= pc && pc < pt->sizecode)
+
+#define checkreg(pt,reg) check((reg) < (pt)->maxstacksize)
+
+
+
+static int precheck (const Proto *pt) {
+ check(pt->maxstacksize <= MAXSTACK);
+ check(pt->sizelineinfo == pt->sizecode || pt->sizelineinfo == 0);
+ lua_assert(pt->numparams+pt->is_vararg <= pt->maxstacksize);
+ check(GET_OPCODE(pt->code[pt->sizecode-1]) == OP_RETURN);
+ return 1;
+}
+
+
+static int checkopenop (const Proto *pt, int pc) {
+ Instruction i = pt->code[pc+1];
+ switch (GET_OPCODE(i)) {
+ case OP_CALL:
+ case OP_TAILCALL:
+ case OP_RETURN: {
+ check(GETARG_B(i) == 0);
+ return 1;
+ }
+ case OP_SETLISTO: return 1;
+ default: return 0; /* invalid instruction after an open call */
+ }
+}
+
+
+static int checkRK (const Proto *pt, int r) {
+ return (r < pt->maxstacksize || (r >= MAXSTACK && r-MAXSTACK < pt->sizek));
+}
+
+
+static Instruction luaG_symbexec (const Proto *pt, int lastpc, int reg) {
+ int pc;
+ int last; /* stores position of last instruction that changed `reg' */
+ last = pt->sizecode-1; /* points to final return (a `neutral' instruction) */
+ check(precheck(pt));
+ for (pc = 0; pc < lastpc; pc++) {
+ const Instruction i = pt->code[pc];
+ OpCode op = GET_OPCODE(i);
+ int a = GETARG_A(i);
+ int b = 0;
+ int c = 0;
+ checkreg(pt, a);
+ switch (getOpMode(op)) {
+ case iABC: {
+ b = GETARG_B(i);
+ c = GETARG_C(i);
+ if (testOpMode(op, OpModeBreg)) {
+ checkreg(pt, b);
+ }
+ else if (testOpMode(op, OpModeBrk))
+ check(checkRK(pt, b));
+ if (testOpMode(op, OpModeCrk))
+ check(checkRK(pt, c));
+ break;
+ }
+ case iABx: {
+ b = GETARG_Bx(i);
+ if (testOpMode(op, OpModeK)) check(b < pt->sizek);
+ break;
+ }
+ case iAsBx: {
+ b = GETARG_sBx(i);
+ break;
+ }
+ }
+ if (testOpMode(op, OpModesetA)) {
+ if (a == reg) last = pc; /* change register `a' */
+ }
+ if (testOpMode(op, OpModeT)) {
+ check(pc+2 < pt->sizecode); /* check skip */
+ check(GET_OPCODE(pt->code[pc+1]) == OP_JMP);
+ }
+ switch (op) {
+ case OP_LOADBOOL: {
+ check(c == 0 || pc+2 < pt->sizecode); /* check its jump */
+ break;
+ }
+ case OP_LOADNIL: {
+ if (a <= reg && reg <= b)
+ last = pc; /* set registers from `a' to `b' */
+ break;
+ }
+ case OP_GETUPVAL:
+ case OP_SETUPVAL: {
+ check(b < pt->nups);
+ break;
+ }
+ case OP_GETGLOBAL:
+ case OP_SETGLOBAL: {
+ check(ttisstring(&pt->k[b]));
+ break;
+ }
+ case OP_SELF: {
+ checkreg(pt, a+1);
+ if (reg == a+1) last = pc;
+ break;
+ }
+ case OP_CONCAT: {
+ /* `c' is a register, and at least two operands */
+ check(c < MAXSTACK && b < c);
+ break;
+ }
+ case OP_TFORLOOP:
+ checkreg(pt, a+c+5);
+ if (reg >= a) last = pc; /* affect all registers above base */
+ /* go through */
+ case OP_FORLOOP:
+ checkreg(pt, a+2);
+ /* go through */
+ case OP_JMP: {
+ int dest = pc+1+b;
+ check(0 <= dest && dest < pt->sizecode);
+ /* not full check and jump is forward and do not skip `lastpc'? */
+ if (reg != NO_REG && pc < dest && dest <= lastpc)
+ pc += b; /* do the jump */
+ break;
+ }
+ case OP_CALL:
+ case OP_TAILCALL: {
+ if (b != 0) {
+ checkreg(pt, a+b-1);
+ }
+ c--; /* c = num. returns */
+ if (c == LUA_MULTRET) {
+ check(checkopenop(pt, pc));
+ }
+ else if (c != 0)
+ checkreg(pt, a+c-1);
+ if (reg >= a) last = pc; /* affect all registers above base */
+ break;
+ }
+ case OP_RETURN: {
+ b--; /* b = num. returns */
+ if (b > 0) checkreg(pt, a+b-1);
+ break;
+ }
+ case OP_SETLIST: {
+ checkreg(pt, a + (b&(LFIELDS_PER_FLUSH-1)) + 1);
+ break;
+ }
+ case OP_CLOSURE: {
+ int nup;
+ check(b < pt->sizep);
+ nup = pt->p[b]->nups;
+ check(pc + nup < pt->sizecode);
+ for (; nup>0; nup--) {
+ OpCode op1 = GET_OPCODE(pt->code[pc+nup]);
+ check(op1 == OP_GETUPVAL || op1 == OP_MOVE);
+ }
+ break;
+ }
+ default: break;
+ }
+ }
+ return pt->code[last];
+}
+
+#undef check
+#undef checkjump
+#undef checkreg
+
+/* }====================================================== */
+
+
+int luaG_checkcode (const Proto *pt) {
+ return luaG_symbexec(pt, pt->sizecode, NO_REG);
+}
+
+
+static const char *kname (Proto *p, int c) {
+ c = c - MAXSTACK;
+ if (c >= 0 && ttisstring(&p->k[c]))
+ return svalue(&p->k[c]);
+ else
+ return "?";
+}
+
+
+static const char *getobjname (CallInfo *ci, int stackpos, const char **name) {
+ if (isLua(ci)) { /* a Lua function? */
+ Proto *p = ci_func(ci)->l.p;
+ int pc = currentpc(ci);
+ Instruction i;
+ *name = luaF_getlocalname(p, stackpos+1, pc);
+ if (*name) /* is a local? */
+ return "local";
+ i = luaG_symbexec(p, pc, stackpos); /* try symbolic execution */
+ lua_assert(pc != -1);
+ switch (GET_OPCODE(i)) {
+ case OP_GETGLOBAL: {
+ int g = GETARG_Bx(i); /* global index */
+ lua_assert(ttisstring(&p->k[g]));
+ *name = svalue(&p->k[g]);
+ return "global";
+ }
+ case OP_MOVE: {
+ int a = GETARG_A(i);
+ int b = GETARG_B(i); /* move from `b' to `a' */
+ if (b < a)
+ return getobjname(ci, b, name); /* get name for `b' */
+ break;
+ }
+ case OP_GETTABLE: {
+ int k = GETARG_C(i); /* key index */
+ *name = kname(p, k);
+ return "field";
+ }
+ case OP_SELF: {
+ int k = GETARG_C(i); /* key index */
+ *name = kname(p, k);
+ return "method";
+ }
+ default: break;
+ }
+ }
+ return NULL; /* no useful name found */
+}
+
+
+static const char *getfuncname (CallInfo *ci, const char **name) {
+ Instruction i;
+ if ((isLua(ci) && ci->u.l.tailcalls > 0) || !isLua(ci - 1))
+ return NULL; /* calling function is not Lua (or is unknown) */
+ ci--; /* calling function */
+ i = ci_func(ci)->l.p->code[currentpc(ci)];
+ if (GET_OPCODE(i) == OP_CALL || GET_OPCODE(i) == OP_TAILCALL)
+ return getobjname(ci, GETARG_A(i), name);
+ else
+ return NULL; /* no useful name can be found */
+}
+
+
+/* only ANSI way to check whether a pointer points to an array */
+static int isinstack (CallInfo *ci, const TObject *o) {
+ StkId p;
+ for (p = ci->base; p < ci->top; p++)
+ if (o == p) return 1;
+ return 0;
+}
+
+
+void luaG_typeerror (lua_State *L, const TObject *o, const char *op) {
+ const char *name = NULL;
+ const char *t = luaT_typenames[ttype(o)];
+ const char *kind = (isinstack(L->ci, o)) ?
+ getobjname(L->ci, o - L->base, &name) : NULL;
+ if (kind)
+ luaG_runerror(L, "attempt to %s %s `%s' (a %s value)",
+ op, kind, name, t);
+ else
+ luaG_runerror(L, "attempt to %s a %s value", op, t);
+}
+
+
+void luaG_concaterror (lua_State *L, StkId p1, StkId p2) {
+ if (ttisstring(p1)) p1 = p2;
+ lua_assert(!ttisstring(p1));
+ luaG_typeerror(L, p1, "concatenate");
+}
+
+
+void luaG_aritherror (lua_State *L, const TObject *p1, const TObject *p2) {
+ TObject temp;
+ if (luaV_tonumber(p1, &temp) == NULL)
+ p2 = p1; /* first operand is wrong */
+ luaG_typeerror(L, p2, "perform arithmetic on");
+}
+
+
+int luaG_ordererror (lua_State *L, const TObject *p1, const TObject *p2) {
+ const char *t1 = luaT_typenames[ttype(p1)];
+ const char *t2 = luaT_typenames[ttype(p2)];
+ if (t1[2] == t2[2])
+ luaG_runerror(L, "attempt to compare two %s values", t1);
+ else
+ luaG_runerror(L, "attempt to compare %s with %s", t1, t2);
+ return 0;
+}
+
+
+static void addinfo (lua_State *L, const char *msg) {
+ CallInfo *ci = L->ci;
+ if (isLua(ci)) { /* is Lua code? */
+ char buff[LUA_IDSIZE]; /* add file:line information */
+ int line = currentline(ci);
+ luaO_chunkid(buff, getstr(getluaproto(ci)->source), LUA_IDSIZE);
+ luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
+ }
+}
+
+
+void luaG_errormsg (lua_State *L) {
+ if (L->errfunc != 0) { /* is there an error handling function? */
+ StkId errfunc = restorestack(L, L->errfunc);
+ if (!ttisfunction(errfunc)) luaD_throw(L, LUA_ERRERR);
+ setobjs2s(L->top, L->top - 1); /* move argument */
+ setobjs2s(L->top - 1, errfunc); /* push function */
+ incr_top(L);
+ luaD_call(L, L->top - 2, 1); /* call it */
+ }
+ luaD_throw(L, LUA_ERRRUN);
+}
+
+
+void luaG_runerror (lua_State *L, const char *fmt, ...) {
+ va_list argp;
+ va_start(argp, fmt);
+ addinfo(L, luaO_pushvfstring(L, fmt, argp));
+ va_end(argp);
+ luaG_errormsg(L);
+}
+
diff --git a/lib/lua/src/ldo.c b/lib/lua/src/ldo.c index 44bba83..8c64852 100644 --- a/lib/lua/src/ldo.c +++ b/lib/lua/src/ldo.c @@ -1,465 +1,465 @@ -/* -** $Id: ldo.c,v 1.3 2004-07-23 13:08:23 pixel Exp $ -** Stack and Call structure of Lua -** See Copyright Notice in lua.h -*/ - - -#include <setjmp.h> -#include <stdlib.h> -#include <string.h> - -#define ldo_c - -#include "lua.h" - -#include "ldebug.h" -#include "ldo.h" -#include "lfunc.h" -#include "lgc.h" -#include "lmem.h" -#include "lobject.h" -#include "lopcodes.h" -#include "lparser.h" -#include "lstate.h" -#include "lstring.h" -#include "ltable.h" -#include "ltm.h" -#include "lundump.h" -#include "lvm.h" -#include "lzio.h" - - - - -/* -** {====================================================== -** Error-recovery functions (based on long jumps) -** ======================================================= -*/ - - -/* chain list of long jump buffers */ -struct lua_longjmp { - struct lua_longjmp *previous; - jmp_buf b; - volatile int status; /* error code */ -}; - - -static void seterrorobj (lua_State *L, int errcode, StkId oldtop) { - switch (errcode) { - case LUA_ERRMEM: { - setsvalue2s(oldtop, luaS_new(L, MEMERRMSG)); - break; - } - case LUA_ERRERR: { - setsvalue2s(oldtop, luaS_new(L, "error in error handling")); - break; - } - case LUA_ERRSYNTAX: - case LUA_ERRRUN: { - setobjs2s(oldtop, L->top - 1); /* error message on current top */ - break; - } - } - L->top = oldtop + 1; -} - - -void luaD_throw (lua_State *L, int errcode) { - if (L->errorJmp) { - L->errorJmp->status = errcode; - longjmp(L->errorJmp->b, 1); - } - else { - G(L)->panic(L); - exit(EXIT_FAILURE); - } -} - - -int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud) { - struct lua_longjmp lj; - lj.status = 0; - lj.previous = L->errorJmp; /* chain new error handler */ - L->errorJmp = &lj; - if (setjmp(lj.b) == 0) - (*f)(L, ud); - L->errorJmp = lj.previous; /* restore old error handler */ - return lj.status; -} - - -static void restore_stack_limit (lua_State *L) { - L->stack_last = L->stack+L->stacksize-1; - if (L->size_ci > LUA_MAXCALLS) { /* there was an overflow? */ - int inuse = (L->ci - L->base_ci); - if (inuse + 1 < LUA_MAXCALLS) /* can `undo' overflow? */ - luaD_reallocCI(L, LUA_MAXCALLS); - } -} - -/* }====================================================== */ - - -static void correctstack (lua_State *L, TObject *oldstack) { - CallInfo *ci; - GCObject *up; - L->top = (L->top - oldstack) + L->stack; - for (up = L->openupval; up != NULL; up = up->gch.next) - gcotouv(up)->v = (gcotouv(up)->v - oldstack) + L->stack; - for (ci = L->base_ci; ci <= L->ci; ci++) { - ci->top = (ci->top - oldstack) + L->stack; - ci->base = (ci->base - oldstack) + L->stack; - } - L->base = L->ci->base; -} - - -void luaD_reallocstack (lua_State *L, int newsize) { - TObject *oldstack = L->stack; - luaM_reallocvector(L, L->stack, L->stacksize, newsize, TObject); - L->stacksize = newsize; - L->stack_last = L->stack+newsize-1-EXTRA_STACK; - correctstack(L, oldstack); -} - - -void luaD_reallocCI (lua_State *L, int newsize) { - CallInfo *oldci = L->base_ci; - luaM_reallocvector(L, L->base_ci, L->size_ci, newsize, CallInfo); - L->size_ci = cast(unsigned short, newsize); - L->ci = (L->ci - oldci) + L->base_ci; - L->end_ci = L->base_ci + L->size_ci; -} - - -void luaD_growstack (lua_State *L, int n) { - if (n <= L->stacksize) /* double size is enough? */ - luaD_reallocstack(L, 2*L->stacksize); - else - luaD_reallocstack(L, L->stacksize + n + EXTRA_STACK); -} - - -static void luaD_growCI (lua_State *L) { - if (L->size_ci > LUA_MAXCALLS) /* overflow while handling overflow? */ - luaD_throw(L, LUA_ERRERR); - else { - luaD_reallocCI(L, 2*L->size_ci); - if (L->size_ci > LUA_MAXCALLS) - luaG_runerror(L, "stack overflow"); - } -} - - -void luaD_callhook (lua_State *L, int event, int line) { - lua_Hook hook = L->hook; - if (hook && L->allowhook) { - ptrdiff_t top = savestack(L, L->top); - ptrdiff_t ci_top = savestack(L, L->ci->top); - lua_Debug ar; - ar.event = event; - ar.currentline = line; - if (event == LUA_HOOKTAILRET) - ar.i_ci = 0; /* tail call; no debug information about it */ - else - ar.i_ci = L->ci - L->base_ci; - luaD_checkstack(L, LUA_MINSTACK); /* ensure minimum stack size */ - L->ci->top = L->top + LUA_MINSTACK; - L->allowhook = 0; /* cannot call hooks inside a hook */ - lua_unlock(L); - (*hook)(L, &ar); - lua_lock(L); - lua_assert(!L->allowhook); - L->allowhook = 1; - L->ci->top = restorestack(L, ci_top); - L->top = restorestack(L, top); - } -} - - -static void adjust_varargs (lua_State *L, int nfixargs, StkId base) { - int i; - Table *htab; - TObject nname; - int actual = L->top - base; /* actual number of arguments */ - if (actual < nfixargs) { - luaD_checkstack(L, nfixargs - actual); - for (; actual < nfixargs; ++actual) - setnilvalue(L->top++); - } - actual -= nfixargs; /* number of extra arguments */ - htab = luaH_new(L, actual, 1); /* create `arg' table */ - for (i=0; i<actual; i++) /* put extra arguments into `arg' table */ - setobj2n(luaH_setnum(L, htab, i+1), L->top - actual + i); - /* store counter in field `n' */ - setsvalue(&nname, luaS_newliteral(L, "n")); - setnvalue(luaH_set(L, htab, &nname), cast(lua_Number, actual)); - L->top -= actual; /* remove extra elements from the stack */ - sethvalue(L->top, htab); - incr_top(L); -} - - -static StkId tryfuncTM (lua_State *L, StkId func) { - const TObject *tm = luaT_gettmbyobj(L, func, TM_CALL); - StkId p; - ptrdiff_t funcr = savestack(L, func); - if (!ttisfunction(tm)) - luaG_typeerror(L, func, "call"); - /* Open a hole inside the stack at `func' */ - for (p = L->top; p > func; p--) setobjs2s(p, p-1); - incr_top(L); - func = restorestack(L, funcr); /* previous call may change stack */ - setobj2s(func, tm); /* tag method is the new function to be called */ - return func; -} - - -StkId luaD_precall (lua_State *L, StkId func) { - LClosure *cl; - ptrdiff_t funcr = savestack(L, func); - if (!ttisfunction(func)) /* `func' is not a function? */ - func = tryfuncTM(L, func); /* check the `function' tag method */ - if (L->ci + 1 == L->end_ci) luaD_growCI(L); - else condhardstacktests(luaD_reallocCI(L, L->size_ci)); - cl = &clvalue(func)->l; - if (!cl->isC) { /* Lua function? prepare its call */ - CallInfo *ci; - Proto *p = cl->p; - if (p->is_vararg) /* varargs? */ - adjust_varargs(L, p->numparams, func+1); - luaD_checkstack(L, p->maxstacksize); - ci = ++L->ci; /* now `enter' new function */ - L->base = L->ci->base = restorestack(L, funcr) + 1; - ci->top = L->base + p->maxstacksize; - ci->u.l.savedpc = p->code; /* starting point */ - ci->u.l.tailcalls = 0; - ci->state = CI_SAVEDPC; - while (L->top < ci->top) - setnilvalue(L->top++); - L->top = ci->top; - return NULL; - } - else { /* if is a C function, call it */ - CallInfo *ci; - int n; - luaD_checkstack(L, LUA_MINSTACK); /* ensure minimum stack size */ - ci = ++L->ci; /* now `enter' new function */ - L->base = L->ci->base = restorestack(L, funcr) + 1; - ci->top = L->top + LUA_MINSTACK; - ci->state = CI_C; /* a C function */ - if (L->hookmask & LUA_MASKCALL) - luaD_callhook(L, LUA_HOOKCALL, -1); - lua_unlock(L); -#ifdef LUA_COMPATUPVALUES - lua_pushupvalues(L); -#endif - n = (*clvalue(L->base - 1)->c.f)(L); /* do the actual call */ - lua_lock(L); - return L->top - n; - } -} - - -static StkId callrethooks (lua_State *L, StkId firstResult) { - ptrdiff_t fr = savestack(L, firstResult); /* next call may change stack */ - luaD_callhook(L, LUA_HOOKRET, -1); - if (!(L->ci->state & CI_C)) { /* Lua function? */ - while (L->ci->u.l.tailcalls--) /* call hook for eventual tail calls */ - luaD_callhook(L, LUA_HOOKTAILRET, -1); - } - return restorestack(L, fr); -} - - -void luaD_poscall (lua_State *L, int wanted, StkId firstResult) { - StkId res; - if (L->hookmask & LUA_MASKRET) - firstResult = callrethooks(L, firstResult); - res = L->base - 1; /* res == final position of 1st result */ - L->ci--; - L->base = L->ci->base; /* restore base */ - /* move results to correct place */ - while (wanted != 0 && firstResult < L->top) { - setobjs2s(res++, firstResult++); - wanted--; - } - while (wanted-- > 0) - setnilvalue(res++); - L->top = res; -} - - -/* -** Call a function (C or Lua). The function to be called is at *func. -** The arguments are on the stack, right after the function. -** When returns, all the results are on the stack, starting at the original -** function position. -*/ -void luaD_call (lua_State *L, StkId func, int nResults) { - StkId firstResult; - lua_assert(!(L->ci->state & CI_CALLING)); - if (++L->nCcalls >= LUA_MAXCCALLS) { - if (L->nCcalls == LUA_MAXCCALLS) - luaG_runerror(L, "C stack overflow"); - else if (L->nCcalls >= (LUA_MAXCCALLS + (LUA_MAXCCALLS>>3))) - luaD_throw(L, LUA_ERRERR); /* error while handing stack error */ - } - firstResult = luaD_precall(L, func); - if (firstResult == NULL) /* is a Lua function? */ - firstResult = luaV_execute(L); /* call it */ - luaD_poscall(L, nResults, firstResult); - L->nCcalls--; - luaC_checkGC(L); -} - - -static void resume (lua_State *L, void *ud) { - StkId firstResult; - int nargs = *cast(int *, ud); - CallInfo *ci = L->ci; - if (ci == L->base_ci) { /* no activation record? */ - if (nargs >= L->top - L->base) - luaG_runerror(L, "cannot resume dead coroutine"); - luaD_precall(L, L->top - (nargs + 1)); /* start coroutine */ - } - else if (ci->state & CI_YIELD) { /* inside a yield? */ - if (ci->state & CI_C) { /* `common' yield? */ - /* finish interrupted execution of `OP_CALL' */ - int nresults; - lua_assert((ci-1)->state & CI_SAVEDPC); - lua_assert(GET_OPCODE(*((ci-1)->u.l.savedpc - 1)) == OP_CALL || - GET_OPCODE(*((ci-1)->u.l.savedpc - 1)) == OP_TAILCALL); - nresults = GETARG_C(*((ci-1)->u.l.savedpc - 1)) - 1; - luaD_poscall(L, nresults, L->top - nargs); /* complete it */ - if (nresults >= 0) L->top = L->ci->top; - } - else { /* yielded inside a hook: just continue its execution */ - ci->state &= ~CI_YIELD; - } - } - else - luaG_runerror(L, "cannot resume non-suspended coroutine"); - firstResult = luaV_execute(L); - if (firstResult != NULL) /* return? */ - luaD_poscall(L, LUA_MULTRET, firstResult); /* finalize this coroutine */ -} - - -LUA_API int lua_resume (lua_State *L, int nargs) { - int status; - lu_byte old_allowhooks; - lua_lock(L); - old_allowhooks = L->allowhook; - lua_assert(L->errfunc == 0 && L->nCcalls == 0); - status = luaD_rawrunprotected(L, resume, &nargs); - if (status != 0) { /* error? */ - L->ci = L->base_ci; /* go back to initial level */ - L->base = L->ci->base; - L->nCcalls = 0; - luaF_close(L, L->base); /* close eventual pending closures */ - seterrorobj(L, status, L->base); - L->allowhook = old_allowhooks; - restore_stack_limit(L); - } - lua_unlock(L); - return status; -} - - -LUA_API int lua_yield (lua_State *L, int nresults) { - CallInfo *ci; - lua_lock(L); - ci = L->ci; - if (L->nCcalls > 0) - luaG_runerror(L, "attempt to yield across metamethod/C-call boundary"); - if (ci->state & CI_C) { /* usual yield */ - if ((ci-1)->state & CI_C) - luaG_runerror(L, "cannot yield a C function"); - if (L->top - nresults > L->base) { /* is there garbage in the stack? */ - int i; - for (i=0; i<nresults; i++) /* move down results */ - setobjs2s(L->base + i, L->top - nresults + i); - L->top = L->base + nresults; - } - } /* else it's an yield inside a hook: nothing to do */ - ci->state |= CI_YIELD; - lua_unlock(L); - return -1; -} - -LUA_API void lua_break (lua_State *L) { - CallInfo * ci; - lua_lock(L); - ci = L->ci; - ci->state |= CI_BREAK; - lua_unlock(L); -} - -int luaD_pcall (lua_State *L, Pfunc func, void *u, - ptrdiff_t old_top, ptrdiff_t ef) { - int status; - unsigned short oldnCcalls = L->nCcalls; - ptrdiff_t old_ci = saveci(L, L->ci); - lu_byte old_allowhooks = L->allowhook; - ptrdiff_t old_errfunc = L->errfunc; - L->errfunc = ef; - status = luaD_rawrunprotected(L, func, u); - if (status != 0) { /* an error occurred? */ - StkId oldtop = restorestack(L, old_top); - luaF_close(L, oldtop); /* close eventual pending closures */ - seterrorobj(L, status, oldtop); - L->nCcalls = oldnCcalls; - L->ci = restoreci(L, old_ci); - L->base = L->ci->base; - L->allowhook = old_allowhooks; - restore_stack_limit(L); - } - L->errfunc = old_errfunc; - return status; -} - - - -/* -** Execute a protected parser. -*/ -struct SParser { /* data to `f_parser' */ - ZIO *z; - Mbuffer buff; /* buffer to be used by the scanner */ - int bin; -}; - -static void f_parser (lua_State *L, void *ud) { - struct SParser *p; - Proto *tf; - Closure *cl; - luaC_checkGC(L); - p = cast(struct SParser *, ud); - tf = p->bin ? luaU_undump(L, p->z, &p->buff) : luaY_parser(L, p->z, &p->buff); - cl = luaF_newLclosure(L, 0, gt(L)); - cl->l.p = tf; - setclvalue(L->top, cl); - incr_top(L); -} - - -int luaD_protectedparser (lua_State *L, ZIO *z, int bin) { - struct SParser p; - int status; - ptrdiff_t oldtopr = savestack(L, L->top); /* save current top */ - p.z = z; p.bin = bin; - luaZ_initbuffer(L, &p.buff); - status = luaD_rawrunprotected(L, f_parser, &p); - luaZ_freebuffer(L, &p.buff); - if (status != 0) { /* error? */ - StkId oldtop = restorestack(L, oldtopr); - seterrorobj(L, status, oldtop); - } - return status; -} - - +/*
+** $Id: ldo.c,v 1.4 2004-11-27 21:35:20 pixel Exp $
+** Stack and Call structure of Lua
+** See Copyright Notice in lua.h
+*/
+
+
+#include <setjmp.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define ldo_c
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lgc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lparser.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+#include "lundump.h"
+#include "lvm.h"
+#include "lzio.h"
+
+
+
+
+/*
+** {======================================================
+** Error-recovery functions (based on long jumps)
+** =======================================================
+*/
+
+
+/* chain list of long jump buffers */
+struct lua_longjmp {
+ struct lua_longjmp *previous;
+ jmp_buf b;
+ volatile int status; /* error code */
+};
+
+
+static void seterrorobj (lua_State *L, int errcode, StkId oldtop) {
+ switch (errcode) {
+ case LUA_ERRMEM: {
+ setsvalue2s(oldtop, luaS_new(L, MEMERRMSG));
+ break;
+ }
+ case LUA_ERRERR: {
+ setsvalue2s(oldtop, luaS_new(L, "error in error handling"));
+ break;
+ }
+ case LUA_ERRSYNTAX:
+ case LUA_ERRRUN: {
+ setobjs2s(oldtop, L->top - 1); /* error message on current top */
+ break;
+ }
+ }
+ L->top = oldtop + 1;
+}
+
+
+void luaD_throw (lua_State *L, int errcode) {
+ if (L->errorJmp) {
+ L->errorJmp->status = errcode;
+ longjmp(L->errorJmp->b, 1);
+ }
+ else {
+ G(L)->panic(L);
+ exit(EXIT_FAILURE);
+ }
+}
+
+
+int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud) {
+ struct lua_longjmp lj;
+ lj.status = 0;
+ lj.previous = L->errorJmp; /* chain new error handler */
+ L->errorJmp = &lj;
+ if (setjmp(lj.b) == 0)
+ (*f)(L, ud);
+ L->errorJmp = lj.previous; /* restore old error handler */
+ return lj.status;
+}
+
+
+static void restore_stack_limit (lua_State *L) {
+ L->stack_last = L->stack+L->stacksize-1;
+ if (L->size_ci > LUA_MAXCALLS) { /* there was an overflow? */
+ int inuse = (L->ci - L->base_ci);
+ if (inuse + 1 < LUA_MAXCALLS) /* can `undo' overflow? */
+ luaD_reallocCI(L, LUA_MAXCALLS);
+ }
+}
+
+/* }====================================================== */
+
+
+static void correctstack (lua_State *L, TObject *oldstack) {
+ CallInfo *ci;
+ GCObject *up;
+ L->top = (L->top - oldstack) + L->stack;
+ for (up = L->openupval; up != NULL; up = up->gch.next)
+ gcotouv(up)->v = (gcotouv(up)->v - oldstack) + L->stack;
+ for (ci = L->base_ci; ci <= L->ci; ci++) {
+ ci->top = (ci->top - oldstack) + L->stack;
+ ci->base = (ci->base - oldstack) + L->stack;
+ }
+ L->base = L->ci->base;
+}
+
+
+void luaD_reallocstack (lua_State *L, int newsize) {
+ TObject *oldstack = L->stack;
+ luaM_reallocvector(L, L->stack, L->stacksize, newsize, TObject);
+ L->stacksize = newsize;
+ L->stack_last = L->stack+newsize-1-EXTRA_STACK;
+ correctstack(L, oldstack);
+}
+
+
+void luaD_reallocCI (lua_State *L, int newsize) {
+ CallInfo *oldci = L->base_ci;
+ luaM_reallocvector(L, L->base_ci, L->size_ci, newsize, CallInfo);
+ L->size_ci = cast(unsigned short, newsize);
+ L->ci = (L->ci - oldci) + L->base_ci;
+ L->end_ci = L->base_ci + L->size_ci;
+}
+
+
+void luaD_growstack (lua_State *L, int n) {
+ if (n <= L->stacksize) /* double size is enough? */
+ luaD_reallocstack(L, 2*L->stacksize);
+ else
+ luaD_reallocstack(L, L->stacksize + n + EXTRA_STACK);
+}
+
+
+static void luaD_growCI (lua_State *L) {
+ if (L->size_ci > LUA_MAXCALLS) /* overflow while handling overflow? */
+ luaD_throw(L, LUA_ERRERR);
+ else {
+ luaD_reallocCI(L, 2*L->size_ci);
+ if (L->size_ci > LUA_MAXCALLS)
+ luaG_runerror(L, "stack overflow");
+ }
+}
+
+
+void luaD_callhook (lua_State *L, int event, int line) {
+ lua_Hook hook = L->hook;
+ if (hook && L->allowhook) {
+ ptrdiff_t top = savestack(L, L->top);
+ ptrdiff_t ci_top = savestack(L, L->ci->top);
+ lua_Debug ar;
+ ar.event = event;
+ ar.currentline = line;
+ if (event == LUA_HOOKTAILRET)
+ ar.i_ci = 0; /* tail call; no debug information about it */
+ else
+ ar.i_ci = L->ci - L->base_ci;
+ luaD_checkstack(L, LUA_MINSTACK); /* ensure minimum stack size */
+ L->ci->top = L->top + LUA_MINSTACK;
+ L->allowhook = 0; /* cannot call hooks inside a hook */
+ lua_unlock(L);
+ (*hook)(L, &ar);
+ lua_lock(L);
+ lua_assert(!L->allowhook);
+ L->allowhook = 1;
+ L->ci->top = restorestack(L, ci_top);
+ L->top = restorestack(L, top);
+ }
+}
+
+
+static void adjust_varargs (lua_State *L, int nfixargs, StkId base) {
+ int i;
+ Table *htab;
+ TObject nname;
+ int actual = L->top - base; /* actual number of arguments */
+ if (actual < nfixargs) {
+ luaD_checkstack(L, nfixargs - actual);
+ for (; actual < nfixargs; ++actual)
+ setnilvalue(L->top++);
+ }
+ actual -= nfixargs; /* number of extra arguments */
+ htab = luaH_new(L, actual, 1); /* create `arg' table */
+ for (i=0; i<actual; i++) /* put extra arguments into `arg' table */
+ setobj2n(luaH_setnum(L, htab, i+1), L->top - actual + i);
+ /* store counter in field `n' */
+ setsvalue(&nname, luaS_newliteral(L, "n"));
+ setnvalue(luaH_set(L, htab, &nname), cast(lua_Number, actual));
+ L->top -= actual; /* remove extra elements from the stack */
+ sethvalue(L->top, htab);
+ incr_top(L);
+}
+
+
+static StkId tryfuncTM (lua_State *L, StkId func) {
+ const TObject *tm = luaT_gettmbyobj(L, func, TM_CALL);
+ StkId p;
+ ptrdiff_t funcr = savestack(L, func);
+ if (!ttisfunction(tm))
+ luaG_typeerror(L, func, "call");
+ /* Open a hole inside the stack at `func' */
+ for (p = L->top; p > func; p--) setobjs2s(p, p-1);
+ incr_top(L);
+ func = restorestack(L, funcr); /* previous call may change stack */
+ setobj2s(func, tm); /* tag method is the new function to be called */
+ return func;
+}
+
+
+StkId luaD_precall (lua_State *L, StkId func) {
+ LClosure *cl;
+ ptrdiff_t funcr = savestack(L, func);
+ if (!ttisfunction(func)) /* `func' is not a function? */
+ func = tryfuncTM(L, func); /* check the `function' tag method */
+ if (L->ci + 1 == L->end_ci) luaD_growCI(L);
+ else condhardstacktests(luaD_reallocCI(L, L->size_ci));
+ cl = &clvalue(func)->l;
+ if (!cl->isC) { /* Lua function? prepare its call */
+ CallInfo *ci;
+ Proto *p = cl->p;
+ if (p->is_vararg) /* varargs? */
+ adjust_varargs(L, p->numparams, func+1);
+ luaD_checkstack(L, p->maxstacksize);
+ ci = ++L->ci; /* now `enter' new function */
+ L->base = L->ci->base = restorestack(L, funcr) + 1;
+ ci->top = L->base + p->maxstacksize;
+ ci->u.l.savedpc = p->code; /* starting point */
+ ci->u.l.tailcalls = 0;
+ ci->state = CI_SAVEDPC;
+ while (L->top < ci->top)
+ setnilvalue(L->top++);
+ L->top = ci->top;
+ return NULL;
+ }
+ else { /* if is a C function, call it */
+ CallInfo *ci;
+ int n;
+ luaD_checkstack(L, LUA_MINSTACK); /* ensure minimum stack size */
+ ci = ++L->ci; /* now `enter' new function */
+ L->base = L->ci->base = restorestack(L, funcr) + 1;
+ ci->top = L->top + LUA_MINSTACK;
+ ci->state = CI_C; /* a C function */
+ if (L->hookmask & LUA_MASKCALL)
+ luaD_callhook(L, LUA_HOOKCALL, -1);
+ lua_unlock(L);
+#ifdef LUA_COMPATUPVALUES
+ lua_pushupvalues(L);
+#endif
+ n = (*clvalue(L->base - 1)->c.f)(L); /* do the actual call */
+ lua_lock(L);
+ return L->top - n;
+ }
+}
+
+
+static StkId callrethooks (lua_State *L, StkId firstResult) {
+ ptrdiff_t fr = savestack(L, firstResult); /* next call may change stack */
+ luaD_callhook(L, LUA_HOOKRET, -1);
+ if (!(L->ci->state & CI_C)) { /* Lua function? */
+ while (L->ci->u.l.tailcalls--) /* call hook for eventual tail calls */
+ luaD_callhook(L, LUA_HOOKTAILRET, -1);
+ }
+ return restorestack(L, fr);
+}
+
+
+void luaD_poscall (lua_State *L, int wanted, StkId firstResult) {
+ StkId res;
+ if (L->hookmask & LUA_MASKRET)
+ firstResult = callrethooks(L, firstResult);
+ res = L->base - 1; /* res == final position of 1st result */
+ L->ci--;
+ L->base = L->ci->base; /* restore base */
+ /* move results to correct place */
+ while (wanted != 0 && firstResult < L->top) {
+ setobjs2s(res++, firstResult++);
+ wanted--;
+ }
+ while (wanted-- > 0)
+ setnilvalue(res++);
+ L->top = res;
+}
+
+
+/*
+** Call a function (C or Lua). The function to be called is at *func.
+** The arguments are on the stack, right after the function.
+** When returns, all the results are on the stack, starting at the original
+** function position.
+*/
+void luaD_call (lua_State *L, StkId func, int nResults) {
+ StkId firstResult;
+ lua_assert(!(L->ci->state & CI_CALLING));
+ if (++L->nCcalls >= LUA_MAXCCALLS) {
+ if (L->nCcalls == LUA_MAXCCALLS)
+ luaG_runerror(L, "C stack overflow");
+ else if (L->nCcalls >= (LUA_MAXCCALLS + (LUA_MAXCCALLS>>3)))
+ luaD_throw(L, LUA_ERRERR); /* error while handing stack error */
+ }
+ firstResult = luaD_precall(L, func);
+ if (firstResult == NULL) /* is a Lua function? */
+ firstResult = luaV_execute(L); /* call it */
+ luaD_poscall(L, nResults, firstResult);
+ L->nCcalls--;
+ luaC_checkGC(L);
+}
+
+
+static void resume (lua_State *L, void *ud) {
+ StkId firstResult;
+ int nargs = *cast(int *, ud);
+ CallInfo *ci = L->ci;
+ if (ci == L->base_ci) { /* no activation record? */
+ if (nargs >= L->top - L->base)
+ luaG_runerror(L, "cannot resume dead coroutine");
+ luaD_precall(L, L->top - (nargs + 1)); /* start coroutine */
+ }
+ else if (ci->state & CI_YIELD) { /* inside a yield? */
+ if (ci->state & CI_C) { /* `common' yield? */
+ /* finish interrupted execution of `OP_CALL' */
+ int nresults;
+ lua_assert((ci-1)->state & CI_SAVEDPC);
+ lua_assert(GET_OPCODE(*((ci-1)->u.l.savedpc - 1)) == OP_CALL ||
+ GET_OPCODE(*((ci-1)->u.l.savedpc - 1)) == OP_TAILCALL);
+ nresults = GETARG_C(*((ci-1)->u.l.savedpc - 1)) - 1;
+ luaD_poscall(L, nresults, L->top - nargs); /* complete it */
+ if (nresults >= 0) L->top = L->ci->top;
+ }
+ else { /* yielded inside a hook: just continue its execution */
+ ci->state &= ~CI_YIELD;
+ }
+ }
+ else
+ luaG_runerror(L, "cannot resume non-suspended coroutine");
+ firstResult = luaV_execute(L);
+ if (firstResult != NULL) /* return? */
+ luaD_poscall(L, LUA_MULTRET, firstResult); /* finalize this coroutine */
+}
+
+
+LUA_API int lua_resume (lua_State *L, int nargs) {
+ int status;
+ lu_byte old_allowhooks;
+ lua_lock(L);
+ old_allowhooks = L->allowhook;
+ lua_assert(L->errfunc == 0 && L->nCcalls == 0);
+ status = luaD_rawrunprotected(L, resume, &nargs);
+ if (status != 0) { /* error? */
+ L->ci = L->base_ci; /* go back to initial level */
+ L->base = L->ci->base;
+ L->nCcalls = 0;
+ luaF_close(L, L->base); /* close eventual pending closures */
+ seterrorobj(L, status, L->base);
+ L->allowhook = old_allowhooks;
+ restore_stack_limit(L);
+ }
+ lua_unlock(L);
+ return status;
+}
+
+
+LUA_API int lua_yield (lua_State *L, int nresults) {
+ CallInfo *ci;
+ lua_lock(L);
+ ci = L->ci;
+ if (L->nCcalls > 0)
+ luaG_runerror(L, "attempt to yield across metamethod/C-call boundary");
+ if (ci->state & CI_C) { /* usual yield */
+ if ((ci-1)->state & CI_C)
+ luaG_runerror(L, "cannot yield a C function");
+ if (L->top - nresults > L->base) { /* is there garbage in the stack? */
+ int i;
+ for (i=0; i<nresults; i++) /* move down results */
+ setobjs2s(L->base + i, L->top - nresults + i);
+ L->top = L->base + nresults;
+ }
+ } /* else it's an yield inside a hook: nothing to do */
+ ci->state |= CI_YIELD;
+ lua_unlock(L);
+ return -1;
+}
+
+LUA_API void lua_break (lua_State *L) {
+ CallInfo * ci;
+ lua_lock(L);
+ ci = L->ci;
+ ci->state |= CI_BREAK;
+ lua_unlock(L);
+}
+
+int luaD_pcall (lua_State *L, Pfunc func, void *u,
+ ptrdiff_t old_top, ptrdiff_t ef) {
+ int status;
+ unsigned short oldnCcalls = L->nCcalls;
+ ptrdiff_t old_ci = saveci(L, L->ci);
+ lu_byte old_allowhooks = L->allowhook;
+ ptrdiff_t old_errfunc = L->errfunc;
+ L->errfunc = ef;
+ status = luaD_rawrunprotected(L, func, u);
+ if (status != 0) { /* an error occurred? */
+ StkId oldtop = restorestack(L, old_top);
+ luaF_close(L, oldtop); /* close eventual pending closures */
+ seterrorobj(L, status, oldtop);
+ L->nCcalls = oldnCcalls;
+ L->ci = restoreci(L, old_ci);
+ L->base = L->ci->base;
+ L->allowhook = old_allowhooks;
+ restore_stack_limit(L);
+ }
+ L->errfunc = old_errfunc;
+ return status;
+}
+
+
+
+/*
+** Execute a protected parser.
+*/
+struct SParser { /* data to `f_parser' */
+ ZIO *z;
+ Mbuffer buff; /* buffer to be used by the scanner */
+ int bin;
+};
+
+static void f_parser (lua_State *L, void *ud) {
+ struct SParser *p;
+ Proto *tf;
+ Closure *cl;
+ luaC_checkGC(L);
+ p = cast(struct SParser *, ud);
+ tf = p->bin ? luaU_undump(L, p->z, &p->buff) : luaY_parser(L, p->z, &p->buff);
+ cl = luaF_newLclosure(L, 0, gt(L));
+ cl->l.p = tf;
+ setclvalue(L->top, cl);
+ incr_top(L);
+}
+
+
+int luaD_protectedparser (lua_State *L, ZIO *z, int bin) {
+ struct SParser p;
+ int status;
+ ptrdiff_t oldtopr = savestack(L, L->top); /* save current top */
+ p.z = z; p.bin = bin;
+ luaZ_initbuffer(L, &p.buff);
+ status = luaD_rawrunprotected(L, f_parser, &p);
+ luaZ_freebuffer(L, &p.buff);
+ if (status != 0) { /* error? */
+ StkId oldtop = restorestack(L, oldtopr);
+ seterrorobj(L, status, oldtop);
+ }
+ return status;
+}
+
+
diff --git a/lib/lua/src/ldump.c b/lib/lua/src/ldump.c index 8af848b..47a2140 100644 --- a/lib/lua/src/ldump.c +++ b/lib/lua/src/ldump.c @@ -1,170 +1,170 @@ -/* -** $Id: ldump.c,v 1.2 2003-12-11 16:53:30 pixel Exp $ -** save bytecodes -** See Copyright Notice in lua.h -*/ - -#include <stddef.h> - -#define ldump_c - -#include "lua.h" - -#include "lobject.h" -#include "lopcodes.h" -#include "lstate.h" -#include "lundump.h" - -#define DumpVector(b,n,size,D) DumpBlock(b,(n)*(size),D) -#define DumpLiteral(s,D) DumpBlock("" s,(sizeof(s))-1,D) - -typedef struct { - lua_State* L; - lua_Chunkwriter write; - void* data; -} DumpState; - -static void DumpBlock(const void* b, size_t size, DumpState* D) -{ - lua_unlock(D->L); - (*D->write)(D->L,b,size,D->data); - lua_lock(D->L); -} - -static void DumpByte(int y, DumpState* D) -{ - char x=(char)y; - DumpBlock(&x,sizeof(x),D); -} - -static void DumpInt(int x, DumpState* D) -{ - DumpBlock(&x,sizeof(x),D); -} - -static void DumpSize(size_t x, DumpState* D) -{ - DumpBlock(&x,sizeof(x),D); -} - -static void DumpNumber(lua_Number x, DumpState* D) -{ - DumpBlock(&x,sizeof(x),D); -} - -static void DumpString(TString* s, DumpState* D) -{ - if (s==NULL || getstr(s)==NULL) - DumpSize(0,D); - else - { - size_t size=s->tsv.len+1; /* include trailing '\0' */ - DumpSize(size,D); - DumpBlock(getstr(s),size,D); - } -} - -static void DumpCode(const Proto* f, DumpState* D) -{ - DumpInt(f->sizecode,D); - DumpVector(f->code,f->sizecode,sizeof(*f->code),D); -} - -static void DumpLocals(const Proto* f, DumpState* D) -{ - int i,n=f->sizelocvars; - DumpInt(n,D); - for (i=0; i<n; i++) - { - DumpString(f->locvars[i].varname,D); - DumpInt(f->locvars[i].startpc,D); - DumpInt(f->locvars[i].endpc,D); - } -} - -static void DumpLines(const Proto* f, DumpState* D) -{ - DumpInt(f->sizelineinfo,D); - DumpVector(f->lineinfo,f->sizelineinfo,sizeof(*f->lineinfo),D); -} - -static void DumpUpvalues(const Proto* f, DumpState* D) -{ - int i,n=f->sizeupvalues; - DumpInt(n,D); - for (i=0; i<n; i++) DumpString(f->upvalues[i],D); -} - -static void DumpFunction(const Proto* f, const TString* p, DumpState* D); - -static void DumpConstants(const Proto* f, DumpState* D) -{ - int i,n; - DumpInt(n=f->sizek,D); - for (i=0; i<n; i++) - { - const TObject* o=&f->k[i]; - DumpByte(ttype(o),D); - switch (ttype(o)) - { - case LUA_TNUMBER: - DumpNumber(nvalue(o),D); - break; - case LUA_TSTRING: - DumpString(tsvalue(o),D); - break; - case LUA_TNIL: - break; - default: - lua_assert(0); /* cannot happen */ - break; - } - } - DumpInt(n=f->sizep,D); - for (i=0; i<n; i++) DumpFunction(f->p[i],f->source,D); -} - -static void DumpFunction(const Proto* f, const TString* p, DumpState* D) -{ - DumpString((f->source==p) ? NULL : f->source,D); - DumpInt(f->lineDefined,D); - DumpByte(f->nups,D); - DumpByte(f->numparams,D); - DumpByte(f->is_vararg,D); - DumpByte(f->maxstacksize,D); - DumpLines(f,D); - DumpLocals(f,D); - DumpUpvalues(f,D); - DumpConstants(f,D); - DumpCode(f,D); -} - -static void DumpHeader(DumpState* D) -{ - DumpLiteral(LUA_SIGNATURE,D); - DumpByte(VERSION,D); - DumpByte(luaU_endianness(),D); - DumpByte(sizeof(int),D); - DumpByte(sizeof(size_t),D); - DumpByte(sizeof(Instruction),D); - DumpByte(SIZE_OP,D); - DumpByte(SIZE_A,D); - DumpByte(SIZE_B,D); - DumpByte(SIZE_C,D); - DumpByte(sizeof(lua_Number),D); - DumpNumber(TEST_NUMBER,D); -} - -/* -** dump function as precompiled chunk -*/ -void luaU_dump (lua_State* L, const Proto* Main, lua_Chunkwriter w, void* data) -{ - DumpState D; - D.L=L; - D.write=w; - D.data=data; - DumpHeader(&D); - DumpFunction(Main,NULL,&D); -} - +/*
+** $Id: ldump.c,v 1.3 2004-11-27 21:35:20 pixel Exp $
+** save bytecodes
+** See Copyright Notice in lua.h
+*/
+
+#include <stddef.h>
+
+#define ldump_c
+
+#include "lua.h"
+
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lstate.h"
+#include "lundump.h"
+
+#define DumpVector(b,n,size,D) DumpBlock(b,(n)*(size),D)
+#define DumpLiteral(s,D) DumpBlock("" s,(sizeof(s))-1,D)
+
+typedef struct {
+ lua_State* L;
+ lua_Chunkwriter write;
+ void* data;
+} DumpState;
+
+static void DumpBlock(const void* b, size_t size, DumpState* D)
+{
+ lua_unlock(D->L);
+ (*D->write)(D->L,b,size,D->data);
+ lua_lock(D->L);
+}
+
+static void DumpByte(int y, DumpState* D)
+{
+ char x=(char)y;
+ DumpBlock(&x,sizeof(x),D);
+}
+
+static void DumpInt(int x, DumpState* D)
+{
+ DumpBlock(&x,sizeof(x),D);
+}
+
+static void DumpSize(size_t x, DumpState* D)
+{
+ DumpBlock(&x,sizeof(x),D);
+}
+
+static void DumpNumber(lua_Number x, DumpState* D)
+{
+ DumpBlock(&x,sizeof(x),D);
+}
+
+static void DumpString(TString* s, DumpState* D)
+{
+ if (s==NULL || getstr(s)==NULL)
+ DumpSize(0,D);
+ else
+ {
+ size_t size=s->tsv.len+1; /* include trailing '\0' */
+ DumpSize(size,D);
+ DumpBlock(getstr(s),size,D);
+ }
+}
+
+static void DumpCode(const Proto* f, DumpState* D)
+{
+ DumpInt(f->sizecode,D);
+ DumpVector(f->code,f->sizecode,sizeof(*f->code),D);
+}
+
+static void DumpLocals(const Proto* f, DumpState* D)
+{
+ int i,n=f->sizelocvars;
+ DumpInt(n,D);
+ for (i=0; i<n; i++)
+ {
+ DumpString(f->locvars[i].varname,D);
+ DumpInt(f->locvars[i].startpc,D);
+ DumpInt(f->locvars[i].endpc,D);
+ }
+}
+
+static void DumpLines(const Proto* f, DumpState* D)
+{
+ DumpInt(f->sizelineinfo,D);
+ DumpVector(f->lineinfo,f->sizelineinfo,sizeof(*f->lineinfo),D);
+}
+
+static void DumpUpvalues(const Proto* f, DumpState* D)
+{
+ int i,n=f->sizeupvalues;
+ DumpInt(n,D);
+ for (i=0; i<n; i++) DumpString(f->upvalues[i],D);
+}
+
+static void DumpFunction(const Proto* f, const TString* p, DumpState* D);
+
+static void DumpConstants(const Proto* f, DumpState* D)
+{
+ int i,n;
+ DumpInt(n=f->sizek,D);
+ for (i=0; i<n; i++)
+ {
+ const TObject* o=&f->k[i];
+ DumpByte(ttype(o),D);
+ switch (ttype(o))
+ {
+ case LUA_TNUMBER:
+ DumpNumber(nvalue(o),D);
+ break;
+ case LUA_TSTRING:
+ DumpString(tsvalue(o),D);
+ break;
+ case LUA_TNIL:
+ break;
+ default:
+ lua_assert(0); /* cannot happen */
+ break;
+ }
+ }
+ DumpInt(n=f->sizep,D);
+ for (i=0; i<n; i++) DumpFunction(f->p[i],f->source,D);
+}
+
+static void DumpFunction(const Proto* f, const TString* p, DumpState* D)
+{
+ DumpString((f->source==p) ? NULL : f->source,D);
+ DumpInt(f->lineDefined,D);
+ DumpByte(f->nups,D);
+ DumpByte(f->numparams,D);
+ DumpByte(f->is_vararg,D);
+ DumpByte(f->maxstacksize,D);
+ DumpLines(f,D);
+ DumpLocals(f,D);
+ DumpUpvalues(f,D);
+ DumpConstants(f,D);
+ DumpCode(f,D);
+}
+
+static void DumpHeader(DumpState* D)
+{
+ DumpLiteral(LUA_SIGNATURE,D);
+ DumpByte(VERSION,D);
+ DumpByte(luaU_endianness(),D);
+ DumpByte(sizeof(int),D);
+ DumpByte(sizeof(size_t),D);
+ DumpByte(sizeof(Instruction),D);
+ DumpByte(SIZE_OP,D);
+ DumpByte(SIZE_A,D);
+ DumpByte(SIZE_B,D);
+ DumpByte(SIZE_C,D);
+ DumpByte(sizeof(lua_Number),D);
+ DumpNumber(TEST_NUMBER,D);
+}
+
+/*
+** dump function as precompiled chunk
+*/
+void luaU_dump (lua_State* L, const Proto* Main, lua_Chunkwriter w, void* data)
+{
+ DumpState D;
+ D.L=L;
+ D.write=w;
+ D.data=data;
+ DumpHeader(&D);
+ DumpFunction(Main,NULL,&D);
+}
+
diff --git a/lib/lua/src/lfunc.c b/lib/lua/src/lfunc.c index eafd953..4e72e53 100644 --- a/lib/lua/src/lfunc.c +++ b/lib/lua/src/lfunc.c @@ -1,135 +1,135 @@ -/* -** $Id: lfunc.c,v 1.2 2003-12-11 16:53:30 pixel Exp $ -** Auxiliary functions to manipulate prototypes and closures -** See Copyright Notice in lua.h -*/ - - -#include <stdlib.h> - -#define lfunc_c - -#include "lua.h" - -#include "lfunc.h" -#include "lgc.h" -#include "lmem.h" -#include "lobject.h" -#include "lstate.h" - - -#define sizeCclosure(n) (cast(int, sizeof(CClosure)) + \ - cast(int, sizeof(TObject)*((n)-1))) - -#define sizeLclosure(n) (cast(int, sizeof(LClosure)) + \ - cast(int, sizeof(TObject *)*((n)-1))) - - - -Closure *luaF_newCclosure (lua_State *L, int nelems) { - Closure *c = cast(Closure *, luaM_malloc(L, sizeCclosure(nelems))); - luaC_link(L, valtogco(c), LUA_TFUNCTION); - c->c.isC = 1; - c->c.nupvalues = cast(lu_byte, nelems); - return c; -} - - -Closure *luaF_newLclosure (lua_State *L, int nelems, TObject *e) { - Closure *c = cast(Closure *, luaM_malloc(L, sizeLclosure(nelems))); - luaC_link(L, valtogco(c), LUA_TFUNCTION); - c->l.isC = 0; - c->l.g = *e; - c->l.nupvalues = cast(lu_byte, nelems); - return c; -} - - -UpVal *luaF_findupval (lua_State *L, StkId level) { - GCObject **pp = &L->openupval; - UpVal *p; - UpVal *v; - while ((p = ngcotouv(*pp)) != NULL && p->v >= level) { - if (p->v == level) return p; - pp = &p->next; - } - v = luaM_new(L, UpVal); /* not found: create a new one */ - v->tt = LUA_TUPVAL; - v->marked = 1; /* open upvalues should not be collected */ - v->v = level; /* current value lives in the stack */ - v->next = *pp; /* chain it in the proper position */ - *pp = valtogco(v); - return v; -} - - -void luaF_close (lua_State *L, StkId level) { - UpVal *p; - while ((p = ngcotouv(L->openupval)) != NULL && p->v >= level) { - setobj(&p->value, p->v); /* save current value (write barrier) */ - p->v = &p->value; /* now current value lives here */ - L->openupval = p->next; /* remove from `open' list */ - luaC_link(L, valtogco(p), LUA_TUPVAL); - } -} - - -Proto *luaF_newproto (lua_State *L) { - Proto *f = luaM_new(L, Proto); - luaC_link(L, valtogco(f), LUA_TPROTO); - f->k = NULL; - f->sizek = 0; - f->p = NULL; - f->sizep = 0; - f->code = NULL; - f->sizecode = 0; - f->sizelineinfo = 0; - f->sizeupvalues = 0; - f->nups = 0; - f->upvalues = NULL; - f->numparams = 0; - f->is_vararg = 0; - f->maxstacksize = 0; - f->lineinfo = NULL; - f->sizelocvars = 0; - f->locvars = NULL; - f->lineDefined = 0; - f->source = NULL; - return f; -} - - -void luaF_freeproto (lua_State *L, Proto *f) { - luaM_freearray(L, f->code, f->sizecode, Instruction); - luaM_freearray(L, f->p, f->sizep, Proto *); - luaM_freearray(L, f->k, f->sizek, TObject); - luaM_freearray(L, f->lineinfo, f->sizelineinfo, int); - luaM_freearray(L, f->locvars, f->sizelocvars, struct LocVar); - luaM_freearray(L, f->upvalues, f->sizeupvalues, TString *); - luaM_freelem(L, f); -} - - -void luaF_freeclosure (lua_State *L, Closure *c) { - int size = (c->c.isC) ? sizeCclosure(c->c.nupvalues) : - sizeLclosure(c->l.nupvalues); - luaM_free(L, c, size); -} - - -/* -** Look for n-th local variable at line `line' in function `func'. -** Returns NULL if not found. -*/ -const char *luaF_getlocalname (const Proto *f, int local_number, int pc) { - int i; - for (i = 0; i<f->sizelocvars && f->locvars[i].startpc <= pc; i++) { - if (pc < f->locvars[i].endpc) { /* is variable active? */ - local_number--; - if (local_number == 0) - return getstr(f->locvars[i].varname); - } - } - return NULL; /* not found */ -} - +/*
+** $Id: lfunc.c,v 1.3 2004-11-27 21:35:20 pixel Exp $
+** Auxiliary functions to manipulate prototypes and closures
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdlib.h>
+
+#define lfunc_c
+
+#include "lua.h"
+
+#include "lfunc.h"
+#include "lgc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+
+
+#define sizeCclosure(n) (cast(int, sizeof(CClosure)) + \
+ cast(int, sizeof(TObject)*((n)-1)))
+
+#define sizeLclosure(n) (cast(int, sizeof(LClosure)) + \
+ cast(int, sizeof(TObject *)*((n)-1)))
+
+
+
+Closure *luaF_newCclosure (lua_State *L, int nelems) {
+ Closure *c = cast(Closure *, luaM_malloc(L, sizeCclosure(nelems)));
+ luaC_link(L, valtogco(c), LUA_TFUNCTION);
+ c->c.isC = 1;
+ c->c.nupvalues = cast(lu_byte, nelems);
+ return c;
+}
+
+
+Closure *luaF_newLclosure (lua_State *L, int nelems, TObject *e) {
+ Closure *c = cast(Closure *, luaM_malloc(L, sizeLclosure(nelems)));
+ luaC_link(L, valtogco(c), LUA_TFUNCTION);
+ c->l.isC = 0;
+ c->l.g = *e;
+ c->l.nupvalues = cast(lu_byte, nelems);
+ return c;
+}
+
+
+UpVal *luaF_findupval (lua_State *L, StkId level) {
+ GCObject **pp = &L->openupval;
+ UpVal *p;
+ UpVal *v;
+ while ((p = ngcotouv(*pp)) != NULL && p->v >= level) {
+ if (p->v == level) return p;
+ pp = &p->next;
+ }
+ v = luaM_new(L, UpVal); /* not found: create a new one */
+ v->tt = LUA_TUPVAL;
+ v->marked = 1; /* open upvalues should not be collected */
+ v->v = level; /* current value lives in the stack */
+ v->next = *pp; /* chain it in the proper position */
+ *pp = valtogco(v);
+ return v;
+}
+
+
+void luaF_close (lua_State *L, StkId level) {
+ UpVal *p;
+ while ((p = ngcotouv(L->openupval)) != NULL && p->v >= level) {
+ setobj(&p->value, p->v); /* save current value (write barrier) */
+ p->v = &p->value; /* now current value lives here */
+ L->openupval = p->next; /* remove from `open' list */
+ luaC_link(L, valtogco(p), LUA_TUPVAL);
+ }
+}
+
+
+Proto *luaF_newproto (lua_State *L) {
+ Proto *f = luaM_new(L, Proto);
+ luaC_link(L, valtogco(f), LUA_TPROTO);
+ f->k = NULL;
+ f->sizek = 0;
+ f->p = NULL;
+ f->sizep = 0;
+ f->code = NULL;
+ f->sizecode = 0;
+ f->sizelineinfo = 0;
+ f->sizeupvalues = 0;
+ f->nups = 0;
+ f->upvalues = NULL;
+ f->numparams = 0;
+ f->is_vararg = 0;
+ f->maxstacksize = 0;
+ f->lineinfo = NULL;
+ f->sizelocvars = 0;
+ f->locvars = NULL;
+ f->lineDefined = 0;
+ f->source = NULL;
+ return f;
+}
+
+
+void luaF_freeproto (lua_State *L, Proto *f) {
+ luaM_freearray(L, f->code, f->sizecode, Instruction);
+ luaM_freearray(L, f->p, f->sizep, Proto *);
+ luaM_freearray(L, f->k, f->sizek, TObject);
+ luaM_freearray(L, f->lineinfo, f->sizelineinfo, int);
+ luaM_freearray(L, f->locvars, f->sizelocvars, struct LocVar);
+ luaM_freearray(L, f->upvalues, f->sizeupvalues, TString *);
+ luaM_freelem(L, f);
+}
+
+
+void luaF_freeclosure (lua_State *L, Closure *c) {
+ int size = (c->c.isC) ? sizeCclosure(c->c.nupvalues) :
+ sizeLclosure(c->l.nupvalues);
+ luaM_free(L, c, size);
+}
+
+
+/*
+** Look for n-th local variable at line `line' in function `func'.
+** Returns NULL if not found.
+*/
+const char *luaF_getlocalname (const Proto *f, int local_number, int pc) {
+ int i;
+ for (i = 0; i<f->sizelocvars && f->locvars[i].startpc <= pc; i++) {
+ if (pc < f->locvars[i].endpc) { /* is variable active? */
+ local_number--;
+ if (local_number == 0)
+ return getstr(f->locvars[i].varname);
+ }
+ }
+ return NULL; /* not found */
+}
+
diff --git a/lib/lua/src/lgc.c b/lib/lua/src/lgc.c index 078cffa..f565df6 100644 --- a/lib/lua/src/lgc.c +++ b/lib/lua/src/lgc.c @@ -1,493 +1,493 @@ -/* -** $Id: lgc.c,v 1.2 2003-12-11 16:53:30 pixel Exp $ -** Garbage Collector -** See Copyright Notice in lua.h -*/ - -#include <string.h> - -#define lgc_c - -#include "lua.h" - -#include "ldebug.h" -#include "ldo.h" -#include "lfunc.h" -#include "lgc.h" -#include "lmem.h" -#include "lobject.h" -#include "lstate.h" -#include "lstring.h" -#include "ltable.h" -#include "ltm.h" - - -typedef struct GCState { - GCObject *tmark; /* list of marked objects to be traversed */ - GCObject *wk; /* list of traversed key-weak tables (to be cleared) */ - GCObject *wv; /* list of traversed value-weak tables */ - GCObject *wkv; /* list of traversed key-value weak tables */ - global_State *g; -} GCState; - - -/* -** some userful bit tricks -*/ -#define setbit(x,b) ((x) |= (1<<(b))) -#define resetbit(x,b) ((x) &= cast(lu_byte, ~(1<<(b)))) -#define testbit(x,b) ((x) & (1<<(b))) - -#define unmark(x) resetbit((x)->gch.marked, 0) -#define ismarked(x) ((x)->gch.marked & ((1<<4)|1)) - -#define stringmark(s) setbit((s)->tsv.marked, 0) - - -#define isfinalized(u) (!testbit((u)->uv.marked, 1)) -#define markfinalized(u) resetbit((u)->uv.marked, 1) - - -#define KEYWEAKBIT 1 -#define VALUEWEAKBIT 2 -#define KEYWEAK (1<<KEYWEAKBIT) -#define VALUEWEAK (1<<VALUEWEAKBIT) - - - -#define markobject(st,o) { checkconsistency(o); \ - if (iscollectable(o) && !ismarked(gcvalue(o))) reallymarkobject(st,gcvalue(o)); } - -#define condmarkobject(st,o,c) { checkconsistency(o); \ - if (iscollectable(o) && !ismarked(gcvalue(o)) && (c)) \ - reallymarkobject(st,gcvalue(o)); } - -#define markvalue(st,t) { if (!ismarked(valtogco(t))) \ - reallymarkobject(st, valtogco(t)); } - - - -static void reallymarkobject (GCState *st, GCObject *o) { - lua_assert(!ismarked(o)); - setbit(o->gch.marked, 0); /* mark object */ - switch (o->gch.tt) { - case LUA_TUSERDATA: { - markvalue(st, gcotou(o)->uv.metatable); - break; - } - case LUA_TFUNCTION: { - gcotocl(o)->c.gclist = st->tmark; - st->tmark = o; - break; - } - case LUA_TTABLE: { - gcotoh(o)->gclist = st->tmark; - st->tmark = o; - break; - } - case LUA_TTHREAD: { - gcototh(o)->gclist = st->tmark; - st->tmark = o; - break; - } - case LUA_TPROTO: { - gcotop(o)->gclist = st->tmark; - st->tmark = o; - break; - } - default: lua_assert(o->gch.tt == LUA_TSTRING); - } -} - - -static void marktmu (GCState *st) { - GCObject *u; - for (u = st->g->tmudata; u; u = u->gch.next) { - unmark(u); /* may be marked, if left from previous GC */ - reallymarkobject(st, u); - } -} - - -/* move `dead' udata that need finalization to list `tmudata' */ -void luaC_separateudata (lua_State *L) { - GCObject **p = &G(L)->rootudata; - GCObject *curr; - GCObject *collected = NULL; /* to collect udata with gc event */ - GCObject **lastcollected = &collected; - while ((curr = *p) != NULL) { - lua_assert(curr->gch.tt == LUA_TUSERDATA); - if (ismarked(curr) || isfinalized(gcotou(curr))) - p = &curr->gch.next; /* don't bother with them */ - - else if (fasttm(L, gcotou(curr)->uv.metatable, TM_GC) == NULL) { - markfinalized(gcotou(curr)); /* don't need finalization */ - p = &curr->gch.next; - } - else { /* must call its gc method */ - *p = curr->gch.next; - curr->gch.next = NULL; /* link `curr' at the end of `collected' list */ - *lastcollected = curr; - lastcollected = &curr->gch.next; - } - } - /* insert collected udata with gc event into `tmudata' list */ - *lastcollected = G(L)->tmudata; - G(L)->tmudata = collected; -} - - -static void removekey (Node *n) { - setnilvalue(gval(n)); /* remove corresponding value ... */ - if (iscollectable(gkey(n))) - setttype(gkey(n), LUA_TNONE); /* dead key; remove it */ -} - - -static void traversetable (GCState *st, Table *h) { - int i; - int weakkey = 0; - int weakvalue = 0; - const TObject *mode; - markvalue(st, h->metatable); - lua_assert(h->lsizenode || h->node == st->g->dummynode); - mode = gfasttm(st->g, h->metatable, TM_MODE); - if (mode && ttisstring(mode)) { /* is there a weak mode? */ - weakkey = (strchr(svalue(mode), 'k') != NULL); - weakvalue = (strchr(svalue(mode), 'v') != NULL); - if (weakkey || weakvalue) { /* is really weak? */ - GCObject **weaklist; - h->marked &= ~(KEYWEAK | VALUEWEAK); /* clear bits */ - h->marked |= cast(lu_byte, (weakkey << KEYWEAKBIT) | - (weakvalue << VALUEWEAKBIT)); - weaklist = (weakkey && weakvalue) ? &st->wkv : - (weakkey) ? &st->wk : - &st->wv; - h->gclist = *weaklist; /* must be cleared after GC, ... */ - *weaklist = valtogco(h); /* ... so put in the appropriate list */ - } - } - if (!weakvalue) { - i = h->sizearray; - while (i--) - markobject(st, &h->array[i]); - } - i = sizenode(h); - while (i--) { - Node *n = gnode(h, i); - if (!ttisnil(gval(n))) { - lua_assert(!ttisnil(gkey(n))); - condmarkobject(st, gkey(n), !weakkey); - condmarkobject(st, gval(n), !weakvalue); - } - } -} - - -static void traverseproto (GCState *st, Proto *f) { - int i; - stringmark(f->source); - for (i=0; i<f->sizek; i++) { /* mark literal strings */ - if (ttisstring(f->k+i)) - stringmark(tsvalue(f->k+i)); - } - for (i=0; i<f->sizeupvalues; i++) /* mark upvalue names */ - stringmark(f->upvalues[i]); - for (i=0; i<f->sizep; i++) /* mark nested protos */ - markvalue(st, f->p[i]); - for (i=0; i<f->sizelocvars; i++) /* mark local-variable names */ - stringmark(f->locvars[i].varname); - lua_assert(luaG_checkcode(f)); -} - - - -static void traverseclosure (GCState *st, Closure *cl) { - if (cl->c.isC) { - int i; - for (i=0; i<cl->c.nupvalues; i++) /* mark its upvalues */ - markobject(st, &cl->c.upvalue[i]); - } - else { - int i; - lua_assert(cl->l.nupvalues == cl->l.p->nups); - markvalue(st, hvalue(&cl->l.g)); - markvalue(st, cl->l.p); - for (i=0; i<cl->l.nupvalues; i++) { /* mark its upvalues */ - UpVal *u = cl->l.upvals[i]; - if (!u->marked) { - markobject(st, &u->value); - u->marked = 1; - } - } - } -} - - -static void checkstacksizes (lua_State *L, StkId max) { - int used = L->ci - L->base_ci; /* number of `ci' in use */ - if (4*used < L->size_ci && 2*BASIC_CI_SIZE < L->size_ci) - luaD_reallocCI(L, L->size_ci/2); /* still big enough... */ - else condhardstacktests(luaD_reallocCI(L, L->size_ci)); - used = max - L->stack; /* part of stack in use */ - if (4*used < L->stacksize && 2*(BASIC_STACK_SIZE+EXTRA_STACK) < L->stacksize) - luaD_reallocstack(L, L->stacksize/2); /* still big enough... */ - else condhardstacktests(luaD_reallocstack(L, L->stacksize)); -} - - -static void traversestack (GCState *st, lua_State *L1) { - StkId o, lim; - CallInfo *ci; - markobject(st, gt(L1)); - lim = L1->top; - for (ci = L1->base_ci; ci <= L1->ci; ci++) { - lua_assert(ci->top <= L1->stack_last); - lua_assert(ci->state & (CI_C | CI_HASFRAME | CI_SAVEDPC)); - if (!(ci->state & CI_C) && lim < ci->top) - lim = ci->top; - } - for (o = L1->stack; o < L1->top; o++) - markobject(st, o); - for (; o <= lim; o++) - setnilvalue(o); - checkstacksizes(L1, lim); -} - - -static void propagatemarks (GCState *st) { - while (st->tmark) { /* traverse marked objects */ - switch (st->tmark->gch.tt) { - case LUA_TTABLE: { - Table *h = gcotoh(st->tmark); - st->tmark = h->gclist; - traversetable(st, h); - break; - } - case LUA_TFUNCTION: { - Closure *cl = gcotocl(st->tmark); - st->tmark = cl->c.gclist; - traverseclosure(st, cl); - break; - } - case LUA_TTHREAD: { - lua_State *th = gcototh(st->tmark); - st->tmark = th->gclist; - traversestack(st, th); - break; - } - case LUA_TPROTO: { - Proto *p = gcotop(st->tmark); - st->tmark = p->gclist; - traverseproto(st, p); - break; - } - default: lua_assert(0); - } - } -} - - -static int valismarked (const TObject *o) { - if (ttisstring(o)) - stringmark(tsvalue(o)); /* strings are `values', so are never weak */ - return !iscollectable(o) || testbit(o->value.gc->gch.marked, 0); -} - - -/* -** clear collected keys from weaktables -*/ -static void cleartablekeys (GCObject *l) { - while (l) { - Table *h = gcotoh(l); - int i = sizenode(h); - lua_assert(h->marked & KEYWEAK); - while (i--) { - Node *n = gnode(h, i); - if (!valismarked(gkey(n))) /* key was collected? */ - removekey(n); /* remove entry from table */ - } - l = h->gclist; - } -} - - -/* -** clear collected values from weaktables -*/ -static void cleartablevalues (GCObject *l) { - while (l) { - Table *h = gcotoh(l); - int i = h->sizearray; - lua_assert(h->marked & VALUEWEAK); - while (i--) { - TObject *o = &h->array[i]; - if (!valismarked(o)) /* value was collected? */ - setnilvalue(o); /* remove value */ - } - i = sizenode(h); - while (i--) { - Node *n = gnode(h, i); - if (!valismarked(gval(n))) /* value was collected? */ - removekey(n); /* remove entry from table */ - } - l = h->gclist; - } -} - - -static void freeobj (lua_State *L, GCObject *o) { - switch (o->gch.tt) { - case LUA_TPROTO: luaF_freeproto(L, gcotop(o)); break; - case LUA_TFUNCTION: luaF_freeclosure(L, gcotocl(o)); break; - case LUA_TUPVAL: luaM_freelem(L, gcotouv(o)); break; - case LUA_TTABLE: luaH_free(L, gcotoh(o)); break; - case LUA_TTHREAD: { - lua_assert(gcototh(o) != L && gcototh(o) != G(L)->mainthread); - luaE_freethread(L, gcototh(o)); - break; - } - case LUA_TSTRING: { - luaM_free(L, o, sizestring(gcotots(o)->tsv.len)); - break; - } - case LUA_TUSERDATA: { - luaM_free(L, o, sizeudata(gcotou(o)->uv.len)); - break; - } - default: lua_assert(0); - } -} - - -static int sweeplist (lua_State *L, GCObject **p, int limit) { - GCObject *curr; - int count = 0; /* number of collected items */ - while ((curr = *p) != NULL) { - if (curr->gch.marked > limit) { - unmark(curr); - p = &curr->gch.next; - } - else { - count++; - *p = curr->gch.next; - freeobj(L, curr); - } - } - return count; -} - - -static void sweepstrings (lua_State *L, int all) { - int i; - for (i=0; i<G(L)->strt.size; i++) { /* for each list */ - G(L)->strt.nuse -= sweeplist(L, &G(L)->strt.hash[i], all); - } -} - - -static void checkSizes (lua_State *L) { - /* check size of string hash */ - if (G(L)->strt.nuse < cast(ls_nstr, G(L)->strt.size/4) && - G(L)->strt.size > MINSTRTABSIZE*2) - luaS_resize(L, G(L)->strt.size/2); /* table is too big */ - /* check size of buffer */ - if (luaZ_sizebuffer(&G(L)->buff) > LUA_MINBUFFER*2) { /* buffer too big? */ - size_t newsize = luaZ_sizebuffer(&G(L)->buff) / 2; - luaZ_resizebuffer(L, &G(L)->buff, newsize); - } - G(L)->GCthreshold = 2*G(L)->nblocks; /* new threshold */ -} - - -static void do1gcTM (lua_State *L, Udata *udata) { - const TObject *tm = fasttm(L, udata->uv.metatable, TM_GC); - if (tm != NULL) { - setobj2s(L->top, tm); - setuvalue(L->top+1, udata); - L->top += 2; - luaD_call(L, L->top - 2, 0); - } -} - - -void luaC_callGCTM (lua_State *L) { - lu_byte oldah = L->allowhook; - L->allowhook = 0; /* stop debug hooks during GC tag methods */ - L->top++; /* reserve space to keep udata while runs its gc method */ - while (G(L)->tmudata != NULL) { - GCObject *o = G(L)->tmudata; - Udata *udata = gcotou(o); - G(L)->tmudata = udata->uv.next; /* remove udata from `tmudata' */ - udata->uv.next = G(L)->rootudata; /* return it to `root' list */ - G(L)->rootudata = o; - setuvalue(L->top - 1, udata); /* keep a reference to it */ - unmark(o); - markfinalized(udata); - do1gcTM(L, udata); - } - L->top--; - L->allowhook = oldah; /* restore hooks */ -} - - -void luaC_sweep (lua_State *L, int all) { - if (all) all = 256; /* larger than any mark */ - sweeplist(L, &G(L)->rootudata, all); - sweepstrings(L, all); - sweeplist(L, &G(L)->rootgc, all); -} - - -/* mark root set */ -static void markroot (GCState *st, lua_State *L) { - global_State *g = st->g; - markobject(st, defaultmeta(L)); - markobject(st, registry(L)); - traversestack(st, g->mainthread); - if (L != g->mainthread) /* another thread is running? */ - markvalue(st, L); /* cannot collect it */ -} - - -static void mark (lua_State *L) { - GCState st; - GCObject *wkv; - st.g = G(L); - st.tmark = NULL; - st.wkv = st.wk = st.wv = NULL; - markroot(&st, L); - propagatemarks(&st); /* mark all reachable objects */ - cleartablevalues(st.wkv); - cleartablevalues(st.wv); - wkv = st.wkv; /* keys must be cleared after preserving udata */ - st.wkv = NULL; - st.wv = NULL; - luaC_separateudata(L); /* separate userdata to be preserved */ - marktmu(&st); /* mark `preserved' userdata */ - propagatemarks(&st); /* remark, to propagate `preserveness' */ - cleartablekeys(wkv); - /* `propagatemarks' may resuscitate some weak tables; clear them too */ - cleartablekeys(st.wk); - cleartablevalues(st.wv); - cleartablekeys(st.wkv); - cleartablevalues(st.wkv); -} - - -void luaC_collectgarbage (lua_State *L) { - mark(L); - luaC_sweep(L, 0); - checkSizes(L); - luaC_callGCTM(L); -} - - -void luaC_link (lua_State *L, GCObject *o, lu_byte tt) { - o->gch.next = G(L)->rootgc; - G(L)->rootgc = o; - o->gch.marked = 0; - o->gch.tt = tt; -} - +/*
+** $Id: lgc.c,v 1.3 2004-11-27 21:35:20 pixel Exp $
+** Garbage Collector
+** See Copyright Notice in lua.h
+*/
+
+#include <string.h>
+
+#define lgc_c
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lgc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+
+
+typedef struct GCState {
+ GCObject *tmark; /* list of marked objects to be traversed */
+ GCObject *wk; /* list of traversed key-weak tables (to be cleared) */
+ GCObject *wv; /* list of traversed value-weak tables */
+ GCObject *wkv; /* list of traversed key-value weak tables */
+ global_State *g;
+} GCState;
+
+
+/*
+** some userful bit tricks
+*/
+#define setbit(x,b) ((x) |= (1<<(b)))
+#define resetbit(x,b) ((x) &= cast(lu_byte, ~(1<<(b))))
+#define testbit(x,b) ((x) & (1<<(b)))
+
+#define unmark(x) resetbit((x)->gch.marked, 0)
+#define ismarked(x) ((x)->gch.marked & ((1<<4)|1))
+
+#define stringmark(s) setbit((s)->tsv.marked, 0)
+
+
+#define isfinalized(u) (!testbit((u)->uv.marked, 1))
+#define markfinalized(u) resetbit((u)->uv.marked, 1)
+
+
+#define KEYWEAKBIT 1
+#define VALUEWEAKBIT 2
+#define KEYWEAK (1<<KEYWEAKBIT)
+#define VALUEWEAK (1<<VALUEWEAKBIT)
+
+
+
+#define markobject(st,o) { checkconsistency(o); \
+ if (iscollectable(o) && !ismarked(gcvalue(o))) reallymarkobject(st,gcvalue(o)); }
+
+#define condmarkobject(st,o,c) { checkconsistency(o); \
+ if (iscollectable(o) && !ismarked(gcvalue(o)) && (c)) \
+ reallymarkobject(st,gcvalue(o)); }
+
+#define markvalue(st,t) { if (!ismarked(valtogco(t))) \
+ reallymarkobject(st, valtogco(t)); }
+
+
+
+static void reallymarkobject (GCState *st, GCObject *o) {
+ lua_assert(!ismarked(o));
+ setbit(o->gch.marked, 0); /* mark object */
+ switch (o->gch.tt) {
+ case LUA_TUSERDATA: {
+ markvalue(st, gcotou(o)->uv.metatable);
+ break;
+ }
+ case LUA_TFUNCTION: {
+ gcotocl(o)->c.gclist = st->tmark;
+ st->tmark = o;
+ break;
+ }
+ case LUA_TTABLE: {
+ gcotoh(o)->gclist = st->tmark;
+ st->tmark = o;
+ break;
+ }
+ case LUA_TTHREAD: {
+ gcototh(o)->gclist = st->tmark;
+ st->tmark = o;
+ break;
+ }
+ case LUA_TPROTO: {
+ gcotop(o)->gclist = st->tmark;
+ st->tmark = o;
+ break;
+ }
+ default: lua_assert(o->gch.tt == LUA_TSTRING);
+ }
+}
+
+
+static void marktmu (GCState *st) {
+ GCObject *u;
+ for (u = st->g->tmudata; u; u = u->gch.next) {
+ unmark(u); /* may be marked, if left from previous GC */
+ reallymarkobject(st, u);
+ }
+}
+
+
+/* move `dead' udata that need finalization to list `tmudata' */
+void luaC_separateudata (lua_State *L) {
+ GCObject **p = &G(L)->rootudata;
+ GCObject *curr;
+ GCObject *collected = NULL; /* to collect udata with gc event */
+ GCObject **lastcollected = &collected;
+ while ((curr = *p) != NULL) {
+ lua_assert(curr->gch.tt == LUA_TUSERDATA);
+ if (ismarked(curr) || isfinalized(gcotou(curr)))
+ p = &curr->gch.next; /* don't bother with them */
+
+ else if (fasttm(L, gcotou(curr)->uv.metatable, TM_GC) == NULL) {
+ markfinalized(gcotou(curr)); /* don't need finalization */
+ p = &curr->gch.next;
+ }
+ else { /* must call its gc method */
+ *p = curr->gch.next;
+ curr->gch.next = NULL; /* link `curr' at the end of `collected' list */
+ *lastcollected = curr;
+ lastcollected = &curr->gch.next;
+ }
+ }
+ /* insert collected udata with gc event into `tmudata' list */
+ *lastcollected = G(L)->tmudata;
+ G(L)->tmudata = collected;
+}
+
+
+static void removekey (Node *n) {
+ setnilvalue(gval(n)); /* remove corresponding value ... */
+ if (iscollectable(gkey(n)))
+ setttype(gkey(n), LUA_TNONE); /* dead key; remove it */
+}
+
+
+static void traversetable (GCState *st, Table *h) {
+ int i;
+ int weakkey = 0;
+ int weakvalue = 0;
+ const TObject *mode;
+ markvalue(st, h->metatable);
+ lua_assert(h->lsizenode || h->node == st->g->dummynode);
+ mode = gfasttm(st->g, h->metatable, TM_MODE);
+ if (mode && ttisstring(mode)) { /* is there a weak mode? */
+ weakkey = (strchr(svalue(mode), 'k') != NULL);
+ weakvalue = (strchr(svalue(mode), 'v') != NULL);
+ if (weakkey || weakvalue) { /* is really weak? */
+ GCObject **weaklist;
+ h->marked &= ~(KEYWEAK | VALUEWEAK); /* clear bits */
+ h->marked |= cast(lu_byte, (weakkey << KEYWEAKBIT) |
+ (weakvalue << VALUEWEAKBIT));
+ weaklist = (weakkey && weakvalue) ? &st->wkv :
+ (weakkey) ? &st->wk :
+ &st->wv;
+ h->gclist = *weaklist; /* must be cleared after GC, ... */
+ *weaklist = valtogco(h); /* ... so put in the appropriate list */
+ }
+ }
+ if (!weakvalue) {
+ i = h->sizearray;
+ while (i--)
+ markobject(st, &h->array[i]);
+ }
+ i = sizenode(h);
+ while (i--) {
+ Node *n = gnode(h, i);
+ if (!ttisnil(gval(n))) {
+ lua_assert(!ttisnil(gkey(n)));
+ condmarkobject(st, gkey(n), !weakkey);
+ condmarkobject(st, gval(n), !weakvalue);
+ }
+ }
+}
+
+
+static void traverseproto (GCState *st, Proto *f) {
+ int i;
+ stringmark(f->source);
+ for (i=0; i<f->sizek; i++) { /* mark literal strings */
+ if (ttisstring(f->k+i))
+ stringmark(tsvalue(f->k+i));
+ }
+ for (i=0; i<f->sizeupvalues; i++) /* mark upvalue names */
+ stringmark(f->upvalues[i]);
+ for (i=0; i<f->sizep; i++) /* mark nested protos */
+ markvalue(st, f->p[i]);
+ for (i=0; i<f->sizelocvars; i++) /* mark local-variable names */
+ stringmark(f->locvars[i].varname);
+ lua_assert(luaG_checkcode(f));
+}
+
+
+
+static void traverseclosure (GCState *st, Closure *cl) {
+ if (cl->c.isC) {
+ int i;
+ for (i=0; i<cl->c.nupvalues; i++) /* mark its upvalues */
+ markobject(st, &cl->c.upvalue[i]);
+ }
+ else {
+ int i;
+ lua_assert(cl->l.nupvalues == cl->l.p->nups);
+ markvalue(st, hvalue(&cl->l.g));
+ markvalue(st, cl->l.p);
+ for (i=0; i<cl->l.nupvalues; i++) { /* mark its upvalues */
+ UpVal *u = cl->l.upvals[i];
+ if (!u->marked) {
+ markobject(st, &u->value);
+ u->marked = 1;
+ }
+ }
+ }
+}
+
+
+static void checkstacksizes (lua_State *L, StkId max) {
+ int used = L->ci - L->base_ci; /* number of `ci' in use */
+ if (4*used < L->size_ci && 2*BASIC_CI_SIZE < L->size_ci)
+ luaD_reallocCI(L, L->size_ci/2); /* still big enough... */
+ else condhardstacktests(luaD_reallocCI(L, L->size_ci));
+ used = max - L->stack; /* part of stack in use */
+ if (4*used < L->stacksize && 2*(BASIC_STACK_SIZE+EXTRA_STACK) < L->stacksize)
+ luaD_reallocstack(L, L->stacksize/2); /* still big enough... */
+ else condhardstacktests(luaD_reallocstack(L, L->stacksize));
+}
+
+
+static void traversestack (GCState *st, lua_State *L1) {
+ StkId o, lim;
+ CallInfo *ci;
+ markobject(st, gt(L1));
+ lim = L1->top;
+ for (ci = L1->base_ci; ci <= L1->ci; ci++) {
+ lua_assert(ci->top <= L1->stack_last);
+ lua_assert(ci->state & (CI_C | CI_HASFRAME | CI_SAVEDPC));
+ if (!(ci->state & CI_C) && lim < ci->top)
+ lim = ci->top;
+ }
+ for (o = L1->stack; o < L1->top; o++)
+ markobject(st, o);
+ for (; o <= lim; o++)
+ setnilvalue(o);
+ checkstacksizes(L1, lim);
+}
+
+
+static void propagatemarks (GCState *st) {
+ while (st->tmark) { /* traverse marked objects */
+ switch (st->tmark->gch.tt) {
+ case LUA_TTABLE: {
+ Table *h = gcotoh(st->tmark);
+ st->tmark = h->gclist;
+ traversetable(st, h);
+ break;
+ }
+ case LUA_TFUNCTION: {
+ Closure *cl = gcotocl(st->tmark);
+ st->tmark = cl->c.gclist;
+ traverseclosure(st, cl);
+ break;
+ }
+ case LUA_TTHREAD: {
+ lua_State *th = gcototh(st->tmark);
+ st->tmark = th->gclist;
+ traversestack(st, th);
+ break;
+ }
+ case LUA_TPROTO: {
+ Proto *p = gcotop(st->tmark);
+ st->tmark = p->gclist;
+ traverseproto(st, p);
+ break;
+ }
+ default: lua_assert(0);
+ }
+ }
+}
+
+
+static int valismarked (const TObject *o) {
+ if (ttisstring(o))
+ stringmark(tsvalue(o)); /* strings are `values', so are never weak */
+ return !iscollectable(o) || testbit(o->value.gc->gch.marked, 0);
+}
+
+
+/*
+** clear collected keys from weaktables
+*/
+static void cleartablekeys (GCObject *l) {
+ while (l) {
+ Table *h = gcotoh(l);
+ int i = sizenode(h);
+ lua_assert(h->marked & KEYWEAK);
+ while (i--) {
+ Node *n = gnode(h, i);
+ if (!valismarked(gkey(n))) /* key was collected? */
+ removekey(n); /* remove entry from table */
+ }
+ l = h->gclist;
+ }
+}
+
+
+/*
+** clear collected values from weaktables
+*/
+static void cleartablevalues (GCObject *l) {
+ while (l) {
+ Table *h = gcotoh(l);
+ int i = h->sizearray;
+ lua_assert(h->marked & VALUEWEAK);
+ while (i--) {
+ TObject *o = &h->array[i];
+ if (!valismarked(o)) /* value was collected? */
+ setnilvalue(o); /* remove value */
+ }
+ i = sizenode(h);
+ while (i--) {
+ Node *n = gnode(h, i);
+ if (!valismarked(gval(n))) /* value was collected? */
+ removekey(n); /* remove entry from table */
+ }
+ l = h->gclist;
+ }
+}
+
+
+static void freeobj (lua_State *L, GCObject *o) {
+ switch (o->gch.tt) {
+ case LUA_TPROTO: luaF_freeproto(L, gcotop(o)); break;
+ case LUA_TFUNCTION: luaF_freeclosure(L, gcotocl(o)); break;
+ case LUA_TUPVAL: luaM_freelem(L, gcotouv(o)); break;
+ case LUA_TTABLE: luaH_free(L, gcotoh(o)); break;
+ case LUA_TTHREAD: {
+ lua_assert(gcototh(o) != L && gcototh(o) != G(L)->mainthread);
+ luaE_freethread(L, gcototh(o));
+ break;
+ }
+ case LUA_TSTRING: {
+ luaM_free(L, o, sizestring(gcotots(o)->tsv.len));
+ break;
+ }
+ case LUA_TUSERDATA: {
+ luaM_free(L, o, sizeudata(gcotou(o)->uv.len));
+ break;
+ }
+ default: lua_assert(0);
+ }
+}
+
+
+static int sweeplist (lua_State *L, GCObject **p, int limit) {
+ GCObject *curr;
+ int count = 0; /* number of collected items */
+ while ((curr = *p) != NULL) {
+ if (curr->gch.marked > limit) {
+ unmark(curr);
+ p = &curr->gch.next;
+ }
+ else {
+ count++;
+ *p = curr->gch.next;
+ freeobj(L, curr);
+ }
+ }
+ return count;
+}
+
+
+static void sweepstrings (lua_State *L, int all) {
+ int i;
+ for (i=0; i<G(L)->strt.size; i++) { /* for each list */
+ G(L)->strt.nuse -= sweeplist(L, &G(L)->strt.hash[i], all);
+ }
+}
+
+
+static void checkSizes (lua_State *L) {
+ /* check size of string hash */
+ if (G(L)->strt.nuse < cast(ls_nstr, G(L)->strt.size/4) &&
+ G(L)->strt.size > MINSTRTABSIZE*2)
+ luaS_resize(L, G(L)->strt.size/2); /* table is too big */
+ /* check size of buffer */
+ if (luaZ_sizebuffer(&G(L)->buff) > LUA_MINBUFFER*2) { /* buffer too big? */
+ size_t newsize = luaZ_sizebuffer(&G(L)->buff) / 2;
+ luaZ_resizebuffer(L, &G(L)->buff, newsize);
+ }
+ G(L)->GCthreshold = 2*G(L)->nblocks; /* new threshold */
+}
+
+
+static void do1gcTM (lua_State *L, Udata *udata) {
+ const TObject *tm = fasttm(L, udata->uv.metatable, TM_GC);
+ if (tm != NULL) {
+ setobj2s(L->top, tm);
+ setuvalue(L->top+1, udata);
+ L->top += 2;
+ luaD_call(L, L->top - 2, 0);
+ }
+}
+
+
+void luaC_callGCTM (lua_State *L) {
+ lu_byte oldah = L->allowhook;
+ L->allowhook = 0; /* stop debug hooks during GC tag methods */
+ L->top++; /* reserve space to keep udata while runs its gc method */
+ while (G(L)->tmudata != NULL) {
+ GCObject *o = G(L)->tmudata;
+ Udata *udata = gcotou(o);
+ G(L)->tmudata = udata->uv.next; /* remove udata from `tmudata' */
+ udata->uv.next = G(L)->rootudata; /* return it to `root' list */
+ G(L)->rootudata = o;
+ setuvalue(L->top - 1, udata); /* keep a reference to it */
+ unmark(o);
+ markfinalized(udata);
+ do1gcTM(L, udata);
+ }
+ L->top--;
+ L->allowhook = oldah; /* restore hooks */
+}
+
+
+void luaC_sweep (lua_State *L, int all) {
+ if (all) all = 256; /* larger than any mark */
+ sweeplist(L, &G(L)->rootudata, all);
+ sweepstrings(L, all);
+ sweeplist(L, &G(L)->rootgc, all);
+}
+
+
+/* mark root set */
+static void markroot (GCState *st, lua_State *L) {
+ global_State *g = st->g;
+ markobject(st, defaultmeta(L));
+ markobject(st, registry(L));
+ traversestack(st, g->mainthread);
+ if (L != g->mainthread) /* another thread is running? */
+ markvalue(st, L); /* cannot collect it */
+}
+
+
+static void mark (lua_State *L) {
+ GCState st;
+ GCObject *wkv;
+ st.g = G(L);
+ st.tmark = NULL;
+ st.wkv = st.wk = st.wv = NULL;
+ markroot(&st, L);
+ propagatemarks(&st); /* mark all reachable objects */
+ cleartablevalues(st.wkv);
+ cleartablevalues(st.wv);
+ wkv = st.wkv; /* keys must be cleared after preserving udata */
+ st.wkv = NULL;
+ st.wv = NULL;
+ luaC_separateudata(L); /* separate userdata to be preserved */
+ marktmu(&st); /* mark `preserved' userdata */
+ propagatemarks(&st); /* remark, to propagate `preserveness' */
+ cleartablekeys(wkv);
+ /* `propagatemarks' may resuscitate some weak tables; clear them too */
+ cleartablekeys(st.wk);
+ cleartablevalues(st.wv);
+ cleartablekeys(st.wkv);
+ cleartablevalues(st.wkv);
+}
+
+
+void luaC_collectgarbage (lua_State *L) {
+ mark(L);
+ luaC_sweep(L, 0);
+ checkSizes(L);
+ luaC_callGCTM(L);
+}
+
+
+void luaC_link (lua_State *L, GCObject *o, lu_byte tt) {
+ o->gch.next = G(L)->rootgc;
+ G(L)->rootgc = o;
+ o->gch.marked = 0;
+ o->gch.tt = tt;
+}
+
diff --git a/lib/lua/src/llex.c b/lib/lua/src/llex.c index f7a5a26..6382cce 100644 --- a/lib/lua/src/llex.c +++ b/lib/lua/src/llex.c @@ -1,442 +1,442 @@ -/* -** $Id: llex.c,v 1.3 2003-12-11 16:53:30 pixel Exp $ -** Lexical Analyzer -** See Copyright Notice in lua.h -*/ - - -#include <ctype.h> -#include <string.h> - -#define llex_c - -#include "lua.h" - -#include "ldo.h" -#include "llex.h" -#include "lobject.h" -#include "lparser.h" -#include "lstate.h" -#include "lstring.h" -#include "lzio.h" - - - -#define next(LS) (LS->current = zgetc(LS->z)) - - - -/* ORDER RESERVED */ -static const char *const token2string [] = { - "and", "break", "do", "else", "elseif", - "end", "false", "for", "function", "if", - "in", "local", "nil", "not", "or", "repeat", - "return", "then", "true", "until", "while", "*name", - "..", "...", "==", ">=", "<=", "~=", - "*number", "*string", "<eof>" -}; - - -void luaX_init (lua_State *L) { - int i; - for (i=0; i<NUM_RESERVED; i++) { - TString *ts = luaS_new(L, token2string[i]); - luaS_fix(ts); /* reserved words are never collected */ - lua_assert(strlen(token2string[i])+1 <= TOKEN_LEN); - ts->tsv.reserved = cast(lu_byte, i+1); /* reserved word */ - } -} - - -#define MAXSRC 80 - - -void luaX_checklimit (LexState *ls, int val, int limit, const char *msg) { - if (val > limit) { - msg = luaO_pushfstring(ls->L, "too many %s (limit=%d)", msg, limit); - luaX_syntaxerror(ls, msg); - } -} - - -void luaX_errorline (LexState *ls, const char *s, const char *token, int line) { - lua_State *L = ls->L; - char buff[MAXSRC]; - luaO_chunkid(buff, getstr(ls->source), MAXSRC); - luaO_pushfstring(L, "%s:%d: %s near `%s'", buff, line, s, token); - luaD_throw(L, LUA_ERRSYNTAX); -} - - -static void luaX_error (LexState *ls, const char *s, const char *token) { - luaX_errorline(ls, s, token, ls->linenumber); -} - - -void luaX_syntaxerror (LexState *ls, const char *msg) { - const char *lasttoken; - switch (ls->t.token) { - case TK_NAME: - lasttoken = getstr(ls->t.seminfo.ts); - break; - case TK_STRING: - case TK_NUMBER: - lasttoken = luaZ_buffer(ls->buff); - break; - default: - lasttoken = luaX_token2str(ls, ls->t.token); - break; - } - luaX_error(ls, msg, lasttoken); -} - - -const char *luaX_token2str (LexState *ls, int token) { - if (token < FIRST_RESERVED) { - lua_assert(token == (unsigned char)token); - return luaO_pushfstring(ls->L, "%c", token); - } - else - return token2string[token-FIRST_RESERVED]; -} - - -static void luaX_lexerror (LexState *ls, const char *s, int token) { - if (token == TK_EOS) - luaX_error(ls, s, luaX_token2str(ls, token)); - else - luaX_error(ls, s, luaZ_buffer(ls->buff)); -} - - -static void inclinenumber (LexState *LS) { - next(LS); /* skip `\n' */ - ++LS->linenumber; - luaX_checklimit(LS, LS->linenumber, MAX_INT, "lines in a chunk"); -} - - -void luaX_setinput (lua_State *L, LexState *LS, ZIO *z, TString *source) { - LS->L = L; - LS->lookahead.token = TK_EOS; /* no look-ahead token */ - LS->z = z; - LS->fs = NULL; - LS->linenumber = 1; - LS->lastline = 1; - LS->source = source; - next(LS); /* read first char */ - if (LS->current == '#') { - do { /* skip first line */ - next(LS); - } while (LS->current != '\n' && LS->current != EOZ); - } -} - - - -/* -** ======================================================= -** LEXICAL ANALYZER -** ======================================================= -*/ - - -/* use buffer to store names, literal strings and numbers */ - -/* extra space to allocate when growing buffer */ -#define EXTRABUFF 32 - -/* maximum number of chars that can be read without checking buffer size */ -#define MAXNOCHECK 5 - -#define checkbuffer(LS, len) \ - if (((len)+MAXNOCHECK)*sizeof(char) > luaZ_sizebuffer((LS)->buff)) \ - luaZ_openspace((LS)->L, (LS)->buff, (len)+EXTRABUFF) - -#define save(LS, c, l) \ - (luaZ_buffer((LS)->buff)[l++] = cast(char, c)) -#define save_and_next(LS, l) (save(LS, LS->current, l), next(LS)) - - -static size_t readname (LexState *LS) { - size_t l = 0; - checkbuffer(LS, l); - do { - checkbuffer(LS, l); - save_and_next(LS, l); - } while (isalnum(LS->current) || LS->current == '_'); - save(LS, '\0', l); - return l-1; -} - - -/* LUA_NUMBER */ -static void read_numeral (LexState *LS, int comma, SemInfo *seminfo) { - int oct = 0, hex = 0; - size_t l = 0; - checkbuffer(LS, l); - if (comma) save(LS, '.', l); - else if (LS->current == '0') { - oct = 1; - checkbuffer(LS, 1); - save_and_next(LS, l); - if (LS->current == 'x') { - oct = 0; - hex = 1; - checkbuffer(LS, 1); - save_and_next(LS, l); - } - } - while (isdigit(LS->current) || (hex && isxdigit(LS->current))) { - checkbuffer(LS, l); - save_and_next(LS, l); - } - checkbuffer(LS, 1); - if (LS->current == '.') { - save_and_next(LS, l); - if (hex || oct) { - save(LS, '\0', l); - luaX_lexerror(LS, - "error in number, mixing decimal point with octal or hexadecimal", - TK_NUMBER); - } - if (LS->current == '.') { - save_and_next(LS, l); - save(LS, '\0', l); - luaX_lexerror(LS, - "ambiguous syntax (decimal point x string concatenation)", - TK_NUMBER); - } - } - while (isdigit(LS->current)) { - checkbuffer(LS, l); - save_and_next(LS, l); - } - if (LS->current == 'e' || LS->current == 'E') { - save_and_next(LS, l); /* read `E' */ - if (hex || oct) { - save(LS, '\0', l); - luaX_lexerror(LS, - "error in number, mixing exponential with octal or hexadecimal", - TK_NUMBER); - } - if (LS->current == '+' || LS->current == '-') - save_and_next(LS, l); /* optional exponent sign */ - while (isdigit(LS->current)) { - checkbuffer(LS, l); - save_and_next(LS, l); - } - } - save(LS, '\0', l); - if (!luaO_str2d(luaZ_buffer(LS->buff), &seminfo->r)) - luaX_lexerror(LS, "malformed number", TK_NUMBER); -} - - -static void read_long_string (LexState *LS, SemInfo *seminfo) { - int cont = 0; - size_t l = 0; - checkbuffer(LS, l); - save(LS, '[', l); /* save first `[' */ - save_and_next(LS, l); /* pass the second `[' */ - if (LS->current == '\n') /* string starts with a newline? */ - inclinenumber(LS); /* skip it */ - for (;;) { - checkbuffer(LS, l); - switch (LS->current) { - case EOZ: - save(LS, '\0', l); - luaX_lexerror(LS, (seminfo) ? "unfinished long string" : - "unfinished long comment", TK_EOS); - break; /* to avoid warnings */ - case '[': - save_and_next(LS, l); - if (LS->current == '[') { - cont++; - save_and_next(LS, l); - } - continue; - case ']': - save_and_next(LS, l); - if (LS->current == ']') { - if (cont == 0) goto endloop; - cont--; - save_and_next(LS, l); - } - continue; - case '\n': - save(LS, '\n', l); - inclinenumber(LS); - if (!seminfo) l = 0; /* reset buffer to avoid wasting space */ - continue; - default: - save_and_next(LS, l); - } - } endloop: - save_and_next(LS, l); /* skip the second `]' */ - save(LS, '\0', l); - if (seminfo) - seminfo->ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff) + 2, l - 5); -} - - -static void read_string (LexState *LS, int del, SemInfo *seminfo) { - size_t l = 0; - checkbuffer(LS, l); - save_and_next(LS, l); - while (LS->current != del) { - checkbuffer(LS, l); - switch (LS->current) { - case EOZ: - save(LS, '\0', l); - luaX_lexerror(LS, "unfinished string", TK_EOS); - break; /* to avoid warnings */ - case '\n': - save(LS, '\0', l); - luaX_lexerror(LS, "unfinished string", TK_STRING); - break; /* to avoid warnings */ - case '\\': - next(LS); /* do not save the `\' */ - switch (LS->current) { - case 'a': save(LS, '\a', l); next(LS); break; - case 'b': save(LS, '\b', l); next(LS); break; - case 'f': save(LS, '\f', l); next(LS); break; - case 'n': save(LS, '\n', l); next(LS); break; - case 'r': save(LS, '\r', l); next(LS); break; - case 't': save(LS, '\t', l); next(LS); break; - case 'v': save(LS, '\v', l); next(LS); break; - case '\n': save(LS, '\n', l); inclinenumber(LS); break; - case EOZ: break; /* will raise an error next loop */ - default: { - if (!isdigit(LS->current)) - save_and_next(LS, l); /* handles \\, \", \', and \? */ - else { /* \xxx */ - int c = 0; - int i = 0; - do { - c = 10*c + (LS->current-'0'); - next(LS); - } while (++i<3 && isdigit(LS->current)); - if (c > UCHAR_MAX) { - save(LS, '\0', l); - luaX_lexerror(LS, "escape sequence too large", TK_STRING); - } - save(LS, c, l); - } - } - } - break; - default: - save_and_next(LS, l); - } - } - save_and_next(LS, l); /* skip delimiter */ - save(LS, '\0', l); - seminfo->ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff) + 1, l - 3); -} - - -int luaX_lex (LexState *LS, SemInfo *seminfo) { - for (;;) { - switch (LS->current) { - - case '\n': { - inclinenumber(LS); - continue; - } - case '-': { - next(LS); - if (LS->current != '-') return '-'; - /* else is a comment */ - next(LS); - if (LS->current == '[' && (next(LS), LS->current == '[')) - read_long_string(LS, NULL); /* long comment */ - else /* short comment */ - while (LS->current != '\n' && LS->current != EOZ) - next(LS); - continue; - } - case '[': { - next(LS); - if (LS->current != '[') return '['; - else { - read_long_string(LS, seminfo); - return TK_STRING; - } - } - case '=': { - next(LS); - if (LS->current != '=') return '='; - else { next(LS); return TK_EQ; } - } - case '<': { - next(LS); - if (LS->current != '=') return '<'; - else { next(LS); return TK_LE; } - } - case '>': { - next(LS); - if (LS->current != '=') return '>'; - else { next(LS); return TK_GE; } - } - case '~': { - next(LS); - if (LS->current != '=') return '~'; - else { next(LS); return TK_NE; } - } - case '"': - case '\'': { - read_string(LS, LS->current, seminfo); - return TK_STRING; - } - case '.': { - next(LS); - if (LS->current == '.') { - next(LS); - if (LS->current == '.') { - next(LS); - return TK_DOTS; /* ... */ - } - else return TK_CONCAT; /* .. */ - } - else if (!isdigit(LS->current)) return '.'; - else { - read_numeral(LS, 1, seminfo); - return TK_NUMBER; - } - } - case EOZ: { - return TK_EOS; - } - default: { - if (isspace(LS->current)) { - next(LS); - continue; - } - else if (isdigit(LS->current)) { - read_numeral(LS, 0, seminfo); - return TK_NUMBER; - } - else if (isalpha(LS->current) || LS->current == '_') { - /* identifier or reserved word */ - size_t l = readname(LS); - TString *ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff), l); - if (ts->tsv.reserved > 0) /* reserved word? */ - return ts->tsv.reserved - 1 + FIRST_RESERVED; - seminfo->ts = ts; - return TK_NAME; - } - else { - int c = LS->current; - if (iscntrl(c)) - luaX_error(LS, "invalid control char", - luaO_pushfstring(LS->L, "char(%d)", c)); - next(LS); - return c; /* single-char tokens (+ - / ...) */ - } - } - } - } -} - -#undef next +/*
+** $Id: llex.c,v 1.4 2004-11-27 21:35:20 pixel Exp $
+** Lexical Analyzer
+** See Copyright Notice in lua.h
+*/
+
+
+#include <ctype.h>
+#include <string.h>
+
+#define llex_c
+
+#include "lua.h"
+
+#include "ldo.h"
+#include "llex.h"
+#include "lobject.h"
+#include "lparser.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "lzio.h"
+
+
+
+#define next(LS) (LS->current = zgetc(LS->z))
+
+
+
+/* ORDER RESERVED */
+static const char *const token2string [] = {
+ "and", "break", "do", "else", "elseif",
+ "end", "false", "for", "function", "if",
+ "in", "local", "nil", "not", "or", "repeat",
+ "return", "then", "true", "until", "while", "*name",
+ "..", "...", "==", ">=", "<=", "~=",
+ "*number", "*string", "<eof>"
+};
+
+
+void luaX_init (lua_State *L) {
+ int i;
+ for (i=0; i<NUM_RESERVED; i++) {
+ TString *ts = luaS_new(L, token2string[i]);
+ luaS_fix(ts); /* reserved words are never collected */
+ lua_assert(strlen(token2string[i])+1 <= TOKEN_LEN);
+ ts->tsv.reserved = cast(lu_byte, i+1); /* reserved word */
+ }
+}
+
+
+#define MAXSRC 80
+
+
+void luaX_checklimit (LexState *ls, int val, int limit, const char *msg) {
+ if (val > limit) {
+ msg = luaO_pushfstring(ls->L, "too many %s (limit=%d)", msg, limit);
+ luaX_syntaxerror(ls, msg);
+ }
+}
+
+
+void luaX_errorline (LexState *ls, const char *s, const char *token, int line) {
+ lua_State *L = ls->L;
+ char buff[MAXSRC];
+ luaO_chunkid(buff, getstr(ls->source), MAXSRC);
+ luaO_pushfstring(L, "%s:%d: %s near `%s'", buff, line, s, token);
+ luaD_throw(L, LUA_ERRSYNTAX);
+}
+
+
+static void luaX_error (LexState *ls, const char *s, const char *token) {
+ luaX_errorline(ls, s, token, ls->linenumber);
+}
+
+
+void luaX_syntaxerror (LexState *ls, const char *msg) {
+ const char *lasttoken;
+ switch (ls->t.token) {
+ case TK_NAME:
+ lasttoken = getstr(ls->t.seminfo.ts);
+ break;
+ case TK_STRING:
+ case TK_NUMBER:
+ lasttoken = luaZ_buffer(ls->buff);
+ break;
+ default:
+ lasttoken = luaX_token2str(ls, ls->t.token);
+ break;
+ }
+ luaX_error(ls, msg, lasttoken);
+}
+
+
+const char *luaX_token2str (LexState *ls, int token) {
+ if (token < FIRST_RESERVED) {
+ lua_assert(token == (unsigned char)token);
+ return luaO_pushfstring(ls->L, "%c", token);
+ }
+ else
+ return token2string[token-FIRST_RESERVED];
+}
+
+
+static void luaX_lexerror (LexState *ls, const char *s, int token) {
+ if (token == TK_EOS)
+ luaX_error(ls, s, luaX_token2str(ls, token));
+ else
+ luaX_error(ls, s, luaZ_buffer(ls->buff));
+}
+
+
+static void inclinenumber (LexState *LS) {
+ next(LS); /* skip `\n' */
+ ++LS->linenumber;
+ luaX_checklimit(LS, LS->linenumber, MAX_INT, "lines in a chunk");
+}
+
+
+void luaX_setinput (lua_State *L, LexState *LS, ZIO *z, TString *source) {
+ LS->L = L;
+ LS->lookahead.token = TK_EOS; /* no look-ahead token */
+ LS->z = z;
+ LS->fs = NULL;
+ LS->linenumber = 1;
+ LS->lastline = 1;
+ LS->source = source;
+ next(LS); /* read first char */
+ if (LS->current == '#') {
+ do { /* skip first line */
+ next(LS);
+ } while (LS->current != '\n' && LS->current != EOZ);
+ }
+}
+
+
+
+/*
+** =======================================================
+** LEXICAL ANALYZER
+** =======================================================
+*/
+
+
+/* use buffer to store names, literal strings and numbers */
+
+/* extra space to allocate when growing buffer */
+#define EXTRABUFF 32
+
+/* maximum number of chars that can be read without checking buffer size */
+#define MAXNOCHECK 5
+
+#define checkbuffer(LS, len) \
+ if (((len)+MAXNOCHECK)*sizeof(char) > luaZ_sizebuffer((LS)->buff)) \
+ luaZ_openspace((LS)->L, (LS)->buff, (len)+EXTRABUFF)
+
+#define save(LS, c, l) \
+ (luaZ_buffer((LS)->buff)[l++] = cast(char, c))
+#define save_and_next(LS, l) (save(LS, LS->current, l), next(LS))
+
+
+static size_t readname (LexState *LS) {
+ size_t l = 0;
+ checkbuffer(LS, l);
+ do {
+ checkbuffer(LS, l);
+ save_and_next(LS, l);
+ } while (isalnum(LS->current) || LS->current == '_');
+ save(LS, '\0', l);
+ return l-1;
+}
+
+
+/* LUA_NUMBER */
+static void read_numeral (LexState *LS, int comma, SemInfo *seminfo) {
+ int oct = 0, hex = 0;
+ size_t l = 0;
+ checkbuffer(LS, l);
+ if (comma) save(LS, '.', l);
+ else if (LS->current == '0') {
+ oct = 1;
+ checkbuffer(LS, 1);
+ save_and_next(LS, l);
+ if (LS->current == 'x') {
+ oct = 0;
+ hex = 1;
+ checkbuffer(LS, 1);
+ save_and_next(LS, l);
+ }
+ }
+ while (isdigit(LS->current) || (hex && isxdigit(LS->current))) {
+ checkbuffer(LS, l);
+ save_and_next(LS, l);
+ }
+ checkbuffer(LS, 1);
+ if (LS->current == '.') {
+ save_and_next(LS, l);
+ if (hex || oct) {
+ save(LS, '\0', l);
+ luaX_lexerror(LS,
+ "error in number, mixing decimal point with octal or hexadecimal",
+ TK_NUMBER);
+ }
+ if (LS->current == '.') {
+ save_and_next(LS, l);
+ save(LS, '\0', l);
+ luaX_lexerror(LS,
+ "ambiguous syntax (decimal point x string concatenation)",
+ TK_NUMBER);
+ }
+ }
+ while (isdigit(LS->current)) {
+ checkbuffer(LS, l);
+ save_and_next(LS, l);
+ }
+ if (LS->current == 'e' || LS->current == 'E') {
+ save_and_next(LS, l); /* read `E' */
+ if (hex || oct) {
+ save(LS, '\0', l);
+ luaX_lexerror(LS,
+ "error in number, mixing exponential with octal or hexadecimal",
+ TK_NUMBER);
+ }
+ if (LS->current == '+' || LS->current == '-')
+ save_and_next(LS, l); /* optional exponent sign */
+ while (isdigit(LS->current)) {
+ checkbuffer(LS, l);
+ save_and_next(LS, l);
+ }
+ }
+ save(LS, '\0', l);
+ if (!luaO_str2d(luaZ_buffer(LS->buff), &seminfo->r))
+ luaX_lexerror(LS, "malformed number", TK_NUMBER);
+}
+
+
+static void read_long_string (LexState *LS, SemInfo *seminfo) {
+ int cont = 0;
+ size_t l = 0;
+ checkbuffer(LS, l);
+ save(LS, '[', l); /* save first `[' */
+ save_and_next(LS, l); /* pass the second `[' */
+ if (LS->current == '\n') /* string starts with a newline? */
+ inclinenumber(LS); /* skip it */
+ for (;;) {
+ checkbuffer(LS, l);
+ switch (LS->current) {
+ case EOZ:
+ save(LS, '\0', l);
+ luaX_lexerror(LS, (seminfo) ? "unfinished long string" :
+ "unfinished long comment", TK_EOS);
+ break; /* to avoid warnings */
+ case '[':
+ save_and_next(LS, l);
+ if (LS->current == '[') {
+ cont++;
+ save_and_next(LS, l);
+ }
+ continue;
+ case ']':
+ save_and_next(LS, l);
+ if (LS->current == ']') {
+ if (cont == 0) goto endloop;
+ cont--;
+ save_and_next(LS, l);
+ }
+ continue;
+ case '\n':
+ save(LS, '\n', l);
+ inclinenumber(LS);
+ if (!seminfo) l = 0; /* reset buffer to avoid wasting space */
+ continue;
+ default:
+ save_and_next(LS, l);
+ }
+ } endloop:
+ save_and_next(LS, l); /* skip the second `]' */
+ save(LS, '\0', l);
+ if (seminfo)
+ seminfo->ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff) + 2, l - 5);
+}
+
+
+static void read_string (LexState *LS, int del, SemInfo *seminfo) {
+ size_t l = 0;
+ checkbuffer(LS, l);
+ save_and_next(LS, l);
+ while (LS->current != del) {
+ checkbuffer(LS, l);
+ switch (LS->current) {
+ case EOZ:
+ save(LS, '\0', l);
+ luaX_lexerror(LS, "unfinished string", TK_EOS);
+ break; /* to avoid warnings */
+ case '\n':
+ save(LS, '\0', l);
+ luaX_lexerror(LS, "unfinished string", TK_STRING);
+ break; /* to avoid warnings */
+ case '\\':
+ next(LS); /* do not save the `\' */
+ switch (LS->current) {
+ case 'a': save(LS, '\a', l); next(LS); break;
+ case 'b': save(LS, '\b', l); next(LS); break;
+ case 'f': save(LS, '\f', l); next(LS); break;
+ case 'n': save(LS, '\n', l); next(LS); break;
+ case 'r': save(LS, '\r', l); next(LS); break;
+ case 't': save(LS, '\t', l); next(LS); break;
+ case 'v': save(LS, '\v', l); next(LS); break;
+ case '\n': save(LS, '\n', l); inclinenumber(LS); break;
+ case EOZ: break; /* will raise an error next loop */
+ default: {
+ if (!isdigit(LS->current))
+ save_and_next(LS, l); /* handles \\, \", \', and \? */
+ else { /* \xxx */
+ int c = 0;
+ int i = 0;
+ do {
+ c = 10*c + (LS->current-'0');
+ next(LS);
+ } while (++i<3 && isdigit(LS->current));
+ if (c > UCHAR_MAX) {
+ save(LS, '\0', l);
+ luaX_lexerror(LS, "escape sequence too large", TK_STRING);
+ }
+ save(LS, c, l);
+ }
+ }
+ }
+ break;
+ default:
+ save_and_next(LS, l);
+ }
+ }
+ save_and_next(LS, l); /* skip delimiter */
+ save(LS, '\0', l);
+ seminfo->ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff) + 1, l - 3);
+}
+
+
+int luaX_lex (LexState *LS, SemInfo *seminfo) {
+ for (;;) {
+ switch (LS->current) {
+
+ case '\n': {
+ inclinenumber(LS);
+ continue;
+ }
+ case '-': {
+ next(LS);
+ if (LS->current != '-') return '-';
+ /* else is a comment */
+ next(LS);
+ if (LS->current == '[' && (next(LS), LS->current == '['))
+ read_long_string(LS, NULL); /* long comment */
+ else /* short comment */
+ while (LS->current != '\n' && LS->current != EOZ)
+ next(LS);
+ continue;
+ }
+ case '[': {
+ next(LS);
+ if (LS->current != '[') return '[';
+ else {
+ read_long_string(LS, seminfo);
+ return TK_STRING;
+ }
+ }
+ case '=': {
+ next(LS);
+ if (LS->current != '=') return '=';
+ else { next(LS); return TK_EQ; }
+ }
+ case '<': {
+ next(LS);
+ if (LS->current != '=') return '<';
+ else { next(LS); return TK_LE; }
+ }
+ case '>': {
+ next(LS);
+ if (LS->current != '=') return '>';
+ else { next(LS); return TK_GE; }
+ }
+ case '~': {
+ next(LS);
+ if (LS->current != '=') return '~';
+ else { next(LS); return TK_NE; }
+ }
+ case '"':
+ case '\'': {
+ read_string(LS, LS->current, seminfo);
+ return TK_STRING;
+ }
+ case '.': {
+ next(LS);
+ if (LS->current == '.') {
+ next(LS);
+ if (LS->current == '.') {
+ next(LS);
+ return TK_DOTS; /* ... */
+ }
+ else return TK_CONCAT; /* .. */
+ }
+ else if (!isdigit(LS->current)) return '.';
+ else {
+ read_numeral(LS, 1, seminfo);
+ return TK_NUMBER;
+ }
+ }
+ case EOZ: {
+ return TK_EOS;
+ }
+ default: {
+ if (isspace(LS->current)) {
+ next(LS);
+ continue;
+ }
+ else if (isdigit(LS->current)) {
+ read_numeral(LS, 0, seminfo);
+ return TK_NUMBER;
+ }
+ else if (isalpha(LS->current) || LS->current == '_') {
+ /* identifier or reserved word */
+ size_t l = readname(LS);
+ TString *ts = luaS_newlstr(LS->L, luaZ_buffer(LS->buff), l);
+ if (ts->tsv.reserved > 0) /* reserved word? */
+ return ts->tsv.reserved - 1 + FIRST_RESERVED;
+ seminfo->ts = ts;
+ return TK_NAME;
+ }
+ else {
+ int c = LS->current;
+ if (iscntrl(c))
+ luaX_error(LS, "invalid control char",
+ luaO_pushfstring(LS->L, "char(%d)", c));
+ next(LS);
+ return c; /* single-char tokens (+ - / ...) */
+ }
+ }
+ }
+ }
+}
+
+#undef next
diff --git a/lib/lua/src/lmem.c b/lib/lua/src/lmem.c index 9f047b9..e14f798 100644 --- a/lib/lua/src/lmem.c +++ b/lib/lua/src/lmem.c @@ -1,91 +1,91 @@ -/* -** $Id: lmem.c,v 1.2 2003-12-11 16:53:30 pixel Exp $ -** Interface to Memory Manager -** See Copyright Notice in lua.h -*/ - - -#include <stdlib.h> - -#define lmem_c - -#include "lua.h" - -#include "ldebug.h" -#include "ldo.h" -#include "lmem.h" -#include "lobject.h" -#include "lstate.h" - - - -/* -** definition for realloc function. It must assure that l_realloc(NULL, -** 0, x) allocates a new block (ANSI C assures that). (`os' is the old -** block size; some allocators may use that.) -*/ -#ifndef l_realloc -#define l_realloc(b,os,s) realloc(b,s) -#endif - -/* -** definition for free function. (`os' is the old block size; some -** allocators may use that.) -*/ -#ifndef l_free -#define l_free(b,os) free(b) -#endif - - -#define MINSIZEARRAY 4 - - -void *luaM_growaux (lua_State *L, void *block, int *size, int size_elems, - int limit, const char *errormsg) { - void *newblock; - int newsize = (*size)*2; - if (newsize < MINSIZEARRAY) - newsize = MINSIZEARRAY; /* minimum size */ - else if (*size >= limit/2) { /* cannot double it? */ - if (*size < limit - MINSIZEARRAY) /* try something smaller... */ - newsize = limit; /* still have at least MINSIZEARRAY free places */ - else luaG_runerror(L, errormsg); - } - newblock = luaM_realloc(L, block, - cast(lu_mem, *size)*cast(lu_mem, size_elems), - cast(lu_mem, newsize)*cast(lu_mem, size_elems)); - *size = newsize; /* update only when everything else is OK */ - return newblock; -} - - -/* -** generic allocation routine. -*/ -void *luaM_realloc (lua_State *L, void *block, lu_mem oldsize, lu_mem size) { - lua_assert((oldsize == 0) == (block == NULL)); - if (size == 0) { - if (block != NULL) { - l_free(block, oldsize); - block = NULL; - } - else return NULL; /* avoid `nblocks' computations when oldsize==size==0 */ - } - else if (size >= MAX_SIZET) - luaG_runerror(L, "memory allocation error: block too big"); - else { - block = l_realloc(block, oldsize, size); - if (block == NULL) { - if (L) - luaD_throw(L, LUA_ERRMEM); - else return NULL; /* error before creating state! */ - } - } - if (L) { - lua_assert(G(L) != NULL && G(L)->nblocks > 0); - G(L)->nblocks -= oldsize; - G(L)->nblocks += size; - } - return block; -} - +/*
+** $Id: lmem.c,v 1.3 2004-11-27 21:35:20 pixel Exp $
+** Interface to Memory Manager
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdlib.h>
+
+#define lmem_c
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+
+
+
+/*
+** definition for realloc function. It must assure that l_realloc(NULL,
+** 0, x) allocates a new block (ANSI C assures that). (`os' is the old
+** block size; some allocators may use that.)
+*/
+#ifndef l_realloc
+#define l_realloc(b,os,s) realloc(b,s)
+#endif
+
+/*
+** definition for free function. (`os' is the old block size; some
+** allocators may use that.)
+*/
+#ifndef l_free
+#define l_free(b,os) free(b)
+#endif
+
+
+#define MINSIZEARRAY 4
+
+
+void *luaM_growaux (lua_State *L, void *block, int *size, int size_elems,
+ int limit, const char *errormsg) {
+ void *newblock;
+ int newsize = (*size)*2;
+ if (newsize < MINSIZEARRAY)
+ newsize = MINSIZEARRAY; /* minimum size */
+ else if (*size >= limit/2) { /* cannot double it? */
+ if (*size < limit - MINSIZEARRAY) /* try something smaller... */
+ newsize = limit; /* still have at least MINSIZEARRAY free places */
+ else luaG_runerror(L, errormsg);
+ }
+ newblock = luaM_realloc(L, block,
+ cast(lu_mem, *size)*cast(lu_mem, size_elems),
+ cast(lu_mem, newsize)*cast(lu_mem, size_elems));
+ *size = newsize; /* update only when everything else is OK */
+ return newblock;
+}
+
+
+/*
+** generic allocation routine.
+*/
+void *luaM_realloc (lua_State *L, void *block, lu_mem oldsize, lu_mem size) {
+ lua_assert((oldsize == 0) == (block == NULL));
+ if (size == 0) {
+ if (block != NULL) {
+ l_free(block, oldsize);
+ block = NULL;
+ }
+ else return NULL; /* avoid `nblocks' computations when oldsize==size==0 */
+ }
+ else if (size >= MAX_SIZET)
+ luaG_runerror(L, "memory allocation error: block too big");
+ else {
+ block = l_realloc(block, oldsize, size);
+ if (block == NULL) {
+ if (L)
+ luaD_throw(L, LUA_ERRMEM);
+ else return NULL; /* error before creating state! */
+ }
+ }
+ if (L) {
+ lua_assert(G(L) != NULL && G(L)->nblocks > 0);
+ G(L)->nblocks -= oldsize;
+ G(L)->nblocks += size;
+ }
+ return block;
+}
+
diff --git a/lib/lua/src/lobject.c b/lib/lua/src/lobject.c index 6a968eb..7153a1c 100644 --- a/lib/lua/src/lobject.c +++ b/lib/lua/src/lobject.c @@ -1,198 +1,198 @@ -/* -** $Id: lobject.c,v 1.3 2003-12-11 16:53:30 pixel Exp $ -** Some generic functions over Lua objects -** See Copyright Notice in lua.h -*/ - -#include <ctype.h> -#include <stdarg.h> -#include <stdlib.h> -#include <string.h> - -#define lobject_c - -#include "lua.h" - -#include "ldo.h" -#include "lmem.h" -#include "lobject.h" -#include "lstate.h" -#include "lstring.h" -#include "lvm.h" - -const TObject luaO_nilobject = {LUA_TNIL, {NULL}}; - - -/* -** converts an integer to a "floating point byte", represented as -** (mmmmmxxx), where the real value is (xxx) * 2^(mmmmm) -*/ -int luaO_int2fb (unsigned int x) { - int m = 0; /* mantissa */ - while (x >= (1<<3)) { - x = (x+1) >> 1; - m++; - } - return (m << 3) | cast(int, x); -} - - -int luaO_log2 (unsigned int x) { - static const lu_byte log_8[255] = { - 0, - 1,1, - 2,2,2,2, - 3,3,3,3,3,3,3,3, - 4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4, - 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5, - 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, - 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, - 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, - 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, - 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, - 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7 - }; - if (x >= 0x00010000) { - if (x >= 0x01000000) return log_8[((x>>24) & 0xff) - 1]+24; - else return log_8[((x>>16) & 0xff) - 1]+16; - } - else { - if (x >= 0x00000100) return log_8[((x>>8) & 0xff) - 1]+8; - else if (x) return log_8[(x & 0xff) - 1]; - return -1; /* special `log' for 0 */ - } -} - - -int luaO_rawequalObj (const TObject *t1, const TObject *t2) { - if (ttype(t1) != ttype(t2)) return 0; - else switch (ttype(t1)) { - case LUA_TNIL: - return 1; - case LUA_TNUMBER: - return nvalue(t1) == nvalue(t2); - case LUA_TBOOLEAN: - return bvalue(t1) == bvalue(t2); /* boolean true must be 1 !! */ - case LUA_TLIGHTUSERDATA: - return pvalue(t1) == pvalue(t2); - default: - lua_assert(iscollectable(t1)); - return gcvalue(t1) == gcvalue(t2); - } -} - - -int luaO_str2d (const char *s, lua_Number *result) { - char *endptr; - size_t l = strlen(s); - lua_Number res; - if ((l > 0) && (s[0] == '0')) { - if ((l > 2) && (s[1] == 'x')) { - res = strtol(s + 2, &endptr, 16); - } else { - res = strtol(s + 1, &endptr, 8); - } - } else { - res = strtod(s, &endptr); - } - if (endptr == s) return 0; /* no conversion */ - while (isspace((unsigned char)(*endptr))) endptr++; - if (*endptr != '\0') return 0; /* invalid trailing characters? */ - *result = res; - return 1; -} - - - -static void pushstr (lua_State *L, const char *str) { - setsvalue2s(L->top, luaS_new(L, str)); - incr_top(L); -} - - -/* this function handles only `%d', `%c', %f, and `%s' formats */ -const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) { - int n = 1; - pushstr(L, ""); - for (;;) { - const char *e = strchr(fmt, '%'); - if (e == NULL) break; - setsvalue2s(L->top, luaS_newlstr(L, fmt, e-fmt)); - incr_top(L); - switch (*(e+1)) { - case 's': - pushstr(L, va_arg(argp, char *)); - break; - case 'c': { - char buff[2]; - buff[0] = cast(char, va_arg(argp, int)); - buff[1] = '\0'; - pushstr(L, buff); - break; - } - case 'd': - setnvalue(L->top, cast(lua_Number, va_arg(argp, int))); - incr_top(L); - break; - case 'f': - setnvalue(L->top, cast(lua_Number, va_arg(argp, l_uacNumber))); - incr_top(L); - break; - case '%': - pushstr(L, "%"); - break; - default: lua_assert(0); - } - n += 2; - fmt = e+2; - } - pushstr(L, fmt); - luaV_concat(L, n+1, L->top - L->base - 1); - L->top -= n; - return svalue(L->top - 1); -} - - -const char *luaO_pushfstring (lua_State *L, const char *fmt, ...) { - const char *msg; - va_list argp; - va_start(argp, fmt); - msg = luaO_pushvfstring(L, fmt, argp); - va_end(argp); - return msg; -} - - -void luaO_chunkid (char *out, const char *source, int bufflen) { - if (*source == '=') { - strncpy(out, source+1, bufflen); /* remove first char */ - out[bufflen-1] = '\0'; /* ensures null termination */ - } - else { /* out = "source", or "...source" */ - if (*source == '@') { - int l; - source++; /* skip the `@' */ - bufflen -= sizeof(" `...' "); - l = strlen(source); - strcpy(out, ""); - if (l>bufflen) { - source += (l-bufflen); /* get last part of file name */ - strcat(out, "..."); - } - strcat(out, source); - } - else { /* out = [string "string"] */ - int len = strcspn(source, "\n"); /* stop at first newline */ - bufflen -= sizeof(" [string \"...\"] "); - if (len > bufflen) len = bufflen; - strcpy(out, "[string \""); - if (source[len] != '\0') { /* must truncate? */ - strncat(out, source, len); - strcat(out, "..."); - } - else - strcat(out, source); - strcat(out, "\"]"); - } - } -} +/*
+** $Id: lobject.c,v 1.4 2004-11-27 21:35:20 pixel Exp $
+** Some generic functions over Lua objects
+** See Copyright Notice in lua.h
+*/
+
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define lobject_c
+
+#include "lua.h"
+
+#include "ldo.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "lvm.h"
+
+const TObject luaO_nilobject = {LUA_TNIL, {NULL}};
+
+
+/*
+** converts an integer to a "floating point byte", represented as
+** (mmmmmxxx), where the real value is (xxx) * 2^(mmmmm)
+*/
+int luaO_int2fb (unsigned int x) {
+ int m = 0; /* mantissa */
+ while (x >= (1<<3)) {
+ x = (x+1) >> 1;
+ m++;
+ }
+ return (m << 3) | cast(int, x);
+}
+
+
+int luaO_log2 (unsigned int x) {
+ static const lu_byte log_8[255] = {
+ 0,
+ 1,1,
+ 2,2,2,2,
+ 3,3,3,3,3,3,3,3,
+ 4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
+ 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
+ 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
+ 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
+ 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+ 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+ 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+ 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
+ };
+ if (x >= 0x00010000) {
+ if (x >= 0x01000000) return log_8[((x>>24) & 0xff) - 1]+24;
+ else return log_8[((x>>16) & 0xff) - 1]+16;
+ }
+ else {
+ if (x >= 0x00000100) return log_8[((x>>8) & 0xff) - 1]+8;
+ else if (x) return log_8[(x & 0xff) - 1];
+ return -1; /* special `log' for 0 */
+ }
+}
+
+
+int luaO_rawequalObj (const TObject *t1, const TObject *t2) {
+ if (ttype(t1) != ttype(t2)) return 0;
+ else switch (ttype(t1)) {
+ case LUA_TNIL:
+ return 1;
+ case LUA_TNUMBER:
+ return nvalue(t1) == nvalue(t2);
+ case LUA_TBOOLEAN:
+ return bvalue(t1) == bvalue(t2); /* boolean true must be 1 !! */
+ case LUA_TLIGHTUSERDATA:
+ return pvalue(t1) == pvalue(t2);
+ default:
+ lua_assert(iscollectable(t1));
+ return gcvalue(t1) == gcvalue(t2);
+ }
+}
+
+
+int luaO_str2d (const char *s, lua_Number *result) {
+ char *endptr;
+ size_t l = strlen(s);
+ lua_Number res;
+ if ((l > 0) && (s[0] == '0')) {
+ if ((l > 2) && (s[1] == 'x')) {
+ res = strtol(s + 2, &endptr, 16);
+ } else {
+ res = strtol(s + 1, &endptr, 8);
+ }
+ } else {
+ res = strtod(s, &endptr);
+ }
+ if (endptr == s) return 0; /* no conversion */
+ while (isspace((unsigned char)(*endptr))) endptr++;
+ if (*endptr != '\0') return 0; /* invalid trailing characters? */
+ *result = res;
+ return 1;
+}
+
+
+
+static void pushstr (lua_State *L, const char *str) {
+ setsvalue2s(L->top, luaS_new(L, str));
+ incr_top(L);
+}
+
+
+/* this function handles only `%d', `%c', %f, and `%s' formats */
+const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
+ int n = 1;
+ pushstr(L, "");
+ for (;;) {
+ const char *e = strchr(fmt, '%');
+ if (e == NULL) break;
+ setsvalue2s(L->top, luaS_newlstr(L, fmt, e-fmt));
+ incr_top(L);
+ switch (*(e+1)) {
+ case 's':
+ pushstr(L, va_arg(argp, char *));
+ break;
+ case 'c': {
+ char buff[2];
+ buff[0] = cast(char, va_arg(argp, int));
+ buff[1] = '\0';
+ pushstr(L, buff);
+ break;
+ }
+ case 'd':
+ setnvalue(L->top, cast(lua_Number, va_arg(argp, int)));
+ incr_top(L);
+ break;
+ case 'f':
+ setnvalue(L->top, cast(lua_Number, va_arg(argp, l_uacNumber)));
+ incr_top(L);
+ break;
+ case '%':
+ pushstr(L, "%");
+ break;
+ default: lua_assert(0);
+ }
+ n += 2;
+ fmt = e+2;
+ }
+ pushstr(L, fmt);
+ luaV_concat(L, n+1, L->top - L->base - 1);
+ L->top -= n;
+ return svalue(L->top - 1);
+}
+
+
+const char *luaO_pushfstring (lua_State *L, const char *fmt, ...) {
+ const char *msg;
+ va_list argp;
+ va_start(argp, fmt);
+ msg = luaO_pushvfstring(L, fmt, argp);
+ va_end(argp);
+ return msg;
+}
+
+
+void luaO_chunkid (char *out, const char *source, int bufflen) {
+ if (*source == '=') {
+ strncpy(out, source+1, bufflen); /* remove first char */
+ out[bufflen-1] = '\0'; /* ensures null termination */
+ }
+ else { /* out = "source", or "...source" */
+ if (*source == '@') {
+ int l;
+ source++; /* skip the `@' */
+ bufflen -= sizeof(" `...' ");
+ l = strlen(source);
+ strcpy(out, "");
+ if (l>bufflen) {
+ source += (l-bufflen); /* get last part of file name */
+ strcat(out, "...");
+ }
+ strcat(out, source);
+ }
+ else { /* out = [string "string"] */
+ int len = strcspn(source, "\n"); /* stop at first newline */
+ bufflen -= sizeof(" [string \"...\"] ");
+ if (len > bufflen) len = bufflen;
+ strcpy(out, "[string \"");
+ if (source[len] != '\0') { /* must truncate? */
+ strncat(out, source, len);
+ strcat(out, "...");
+ }
+ else
+ strcat(out, source);
+ strcat(out, "\"]");
+ }
+ }
+}
diff --git a/lib/lua/src/lopcodes.c b/lib/lua/src/lopcodes.c index 264b468..6d405d4 100644 --- a/lib/lua/src/lopcodes.c +++ b/lib/lua/src/lopcodes.c @@ -1,102 +1,102 @@ -/* -** $Id: lopcodes.c,v 1.2 2003-12-11 16:53:30 pixel Exp $ -** extracted automatically from lopcodes.h by mkprint.lua -** DO NOT EDIT -** See Copyright Notice in lua.h -*/ - - -#define lopcodes_c - -#include "lua.h" - -#include "lobject.h" -#include "lopcodes.h" - - -#ifdef LUA_OPNAMES - -const char *const luaP_opnames[] = { - "MOVE", - "LOADK", - "LOADBOOL", - "LOADNIL", - "GETUPVAL", - "GETGLOBAL", - "GETTABLE", - "SETGLOBAL", - "SETUPVAL", - "SETTABLE", - "NEWTABLE", - "SELF", - "ADD", - "SUB", - "MUL", - "DIV", - "POW", - "UNM", - "NOT", - "CONCAT", - "JMP", - "EQ", - "LT", - "LE", - "TEST", - "CALL", - "TAILCALL", - "RETURN", - "FORLOOP", - "TFORLOOP", - "TFORPREP", - "SETLIST", - "SETLISTO", - "CLOSE", - "CLOSURE" -}; - -#endif - -#define opmode(t,b,bk,ck,sa,k,m) (((t)<<OpModeT) | \ - ((b)<<OpModeBreg) | ((bk)<<OpModeBrk) | ((ck)<<OpModeCrk) | \ - ((sa)<<OpModesetA) | ((k)<<OpModeK) | (m)) - - -const lu_byte luaP_opmodes[NUM_OPCODES] = { -/* T B Bk Ck sA K mode opcode */ - opmode(0, 1, 0, 0, 1, 0, iABC) /* OP_MOVE */ - ,opmode(0, 0, 0, 0, 1, 1, iABx) /* OP_LOADK */ - ,opmode(0, 0, 0, 0, 1, 0, iABC) /* OP_LOADBOOL */ - ,opmode(0, 1, 0, 0, 1, 0, iABC) /* OP_LOADNIL */ - ,opmode(0, 0, 0, 0, 1, 0, iABC) /* OP_GETUPVAL */ - ,opmode(0, 0, 0, 0, 1, 1, iABx) /* OP_GETGLOBAL */ - ,opmode(0, 1, 0, 1, 1, 0, iABC) /* OP_GETTABLE */ - ,opmode(0, 0, 0, 0, 0, 1, iABx) /* OP_SETGLOBAL */ - ,opmode(0, 0, 0, 0, 0, 0, iABC) /* OP_SETUPVAL */ - ,opmode(0, 0, 1, 1, 0, 0, iABC) /* OP_SETTABLE */ - ,opmode(0, 0, 0, 0, 1, 0, iABC) /* OP_NEWTABLE */ - ,opmode(0, 1, 0, 1, 1, 0, iABC) /* OP_SELF */ - ,opmode(0, 0, 1, 1, 1, 0, iABC) /* OP_ADD */ - ,opmode(0, 0, 1, 1, 1, 0, iABC) /* OP_SUB */ - ,opmode(0, 0, 1, 1, 1, 0, iABC) /* OP_MUL */ - ,opmode(0, 0, 1, 1, 1, 0, iABC) /* OP_DIV */ - ,opmode(0, 0, 1, 1, 1, 0, iABC) /* OP_POW */ - ,opmode(0, 1, 0, 0, 1, 0, iABC) /* OP_UNM */ - ,opmode(0, 1, 0, 0, 1, 0, iABC) /* OP_NOT */ - ,opmode(0, 1, 0, 1, 1, 0, iABC) /* OP_CONCAT */ - ,opmode(0, 0, 0, 0, 0, 0, iAsBx) /* OP_JMP */ - ,opmode(1, 0, 1, 1, 0, 0, iABC) /* OP_EQ */ - ,opmode(1, 0, 1, 1, 0, 0, iABC) /* OP_LT */ - ,opmode(1, 0, 1, 1, 0, 0, iABC) /* OP_LE */ - ,opmode(1, 1, 0, 0, 1, 0, iABC) /* OP_TEST */ - ,opmode(0, 0, 0, 0, 0, 0, iABC) /* OP_CALL */ - ,opmode(0, 0, 0, 0, 0, 0, iABC) /* OP_TAILCALL */ - ,opmode(0, 0, 0, 0, 0, 0, iABC) /* OP_RETURN */ - ,opmode(0, 0, 0, 0, 0, 0, iAsBx) /* OP_FORLOOP */ - ,opmode(1, 0, 0, 0, 0, 0, iABC) /* OP_TFORLOOP */ - ,opmode(0, 0, 0, 0, 0, 0, iAsBx) /* OP_TFORPREP */ - ,opmode(0, 0, 0, 0, 0, 0, iABx) /* OP_SETLIST */ - ,opmode(0, 0, 0, 0, 0, 0, iABx) /* OP_SETLISTO */ - ,opmode(0, 0, 0, 0, 0, 0, iABC) /* OP_CLOSE */ - ,opmode(0, 0, 0, 0, 1, 0, iABx) /* OP_CLOSURE */ -}; - +/*
+** $Id: lopcodes.c,v 1.3 2004-11-27 21:35:20 pixel Exp $
+** extracted automatically from lopcodes.h by mkprint.lua
+** DO NOT EDIT
+** See Copyright Notice in lua.h
+*/
+
+
+#define lopcodes_c
+
+#include "lua.h"
+
+#include "lobject.h"
+#include "lopcodes.h"
+
+
+#ifdef LUA_OPNAMES
+
+const char *const luaP_opnames[] = {
+ "MOVE",
+ "LOADK",
+ "LOADBOOL",
+ "LOADNIL",
+ "GETUPVAL",
+ "GETGLOBAL",
+ "GETTABLE",
+ "SETGLOBAL",
+ "SETUPVAL",
+ "SETTABLE",
+ "NEWTABLE",
+ "SELF",
+ "ADD",
+ "SUB",
+ "MUL",
+ "DIV",
+ "POW",
+ "UNM",
+ "NOT",
+ "CONCAT",
+ "JMP",
+ "EQ",
+ "LT",
+ "LE",
+ "TEST",
+ "CALL",
+ "TAILCALL",
+ "RETURN",
+ "FORLOOP",
+ "TFORLOOP",
+ "TFORPREP",
+ "SETLIST",
+ "SETLISTO",
+ "CLOSE",
+ "CLOSURE"
+};
+
+#endif
+
+#define opmode(t,b,bk,ck,sa,k,m) (((t)<<OpModeT) | \
+ ((b)<<OpModeBreg) | ((bk)<<OpModeBrk) | ((ck)<<OpModeCrk) | \
+ ((sa)<<OpModesetA) | ((k)<<OpModeK) | (m))
+
+
+const lu_byte luaP_opmodes[NUM_OPCODES] = {
+/* T B Bk Ck sA K mode opcode */
+ opmode(0, 1, 0, 0, 1, 0, iABC) /* OP_MOVE */
+ ,opmode(0, 0, 0, 0, 1, 1, iABx) /* OP_LOADK */
+ ,opmode(0, 0, 0, 0, 1, 0, iABC) /* OP_LOADBOOL */
+ ,opmode(0, 1, 0, 0, 1, 0, iABC) /* OP_LOADNIL */
+ ,opmode(0, 0, 0, 0, 1, 0, iABC) /* OP_GETUPVAL */
+ ,opmode(0, 0, 0, 0, 1, 1, iABx) /* OP_GETGLOBAL */
+ ,opmode(0, 1, 0, 1, 1, 0, iABC) /* OP_GETTABLE */
+ ,opmode(0, 0, 0, 0, 0, 1, iABx) /* OP_SETGLOBAL */
+ ,opmode(0, 0, 0, 0, 0, 0, iABC) /* OP_SETUPVAL */
+ ,opmode(0, 0, 1, 1, 0, 0, iABC) /* OP_SETTABLE */
+ ,opmode(0, 0, 0, 0, 1, 0, iABC) /* OP_NEWTABLE */
+ ,opmode(0, 1, 0, 1, 1, 0, iABC) /* OP_SELF */
+ ,opmode(0, 0, 1, 1, 1, 0, iABC) /* OP_ADD */
+ ,opmode(0, 0, 1, 1, 1, 0, iABC) /* OP_SUB */
+ ,opmode(0, 0, 1, 1, 1, 0, iABC) /* OP_MUL */
+ ,opmode(0, 0, 1, 1, 1, 0, iABC) /* OP_DIV */
+ ,opmode(0, 0, 1, 1, 1, 0, iABC) /* OP_POW */
+ ,opmode(0, 1, 0, 0, 1, 0, iABC) /* OP_UNM */
+ ,opmode(0, 1, 0, 0, 1, 0, iABC) /* OP_NOT */
+ ,opmode(0, 1, 0, 1, 1, 0, iABC) /* OP_CONCAT */
+ ,opmode(0, 0, 0, 0, 0, 0, iAsBx) /* OP_JMP */
+ ,opmode(1, 0, 1, 1, 0, 0, iABC) /* OP_EQ */
+ ,opmode(1, 0, 1, 1, 0, 0, iABC) /* OP_LT */
+ ,opmode(1, 0, 1, 1, 0, 0, iABC) /* OP_LE */
+ ,opmode(1, 1, 0, 0, 1, 0, iABC) /* OP_TEST */
+ ,opmode(0, 0, 0, 0, 0, 0, iABC) /* OP_CALL */
+ ,opmode(0, 0, 0, 0, 0, 0, iABC) /* OP_TAILCALL */
+ ,opmode(0, 0, 0, 0, 0, 0, iABC) /* OP_RETURN */
+ ,opmode(0, 0, 0, 0, 0, 0, iAsBx) /* OP_FORLOOP */
+ ,opmode(1, 0, 0, 0, 0, 0, iABC) /* OP_TFORLOOP */
+ ,opmode(0, 0, 0, 0, 0, 0, iAsBx) /* OP_TFORPREP */
+ ,opmode(0, 0, 0, 0, 0, 0, iABx) /* OP_SETLIST */
+ ,opmode(0, 0, 0, 0, 0, 0, iABx) /* OP_SETLISTO */
+ ,opmode(0, 0, 0, 0, 0, 0, iABC) /* OP_CLOSE */
+ ,opmode(0, 0, 0, 0, 1, 0, iABx) /* OP_CLOSURE */
+};
+
diff --git a/lib/lua/src/lparser.c b/lib/lua/src/lparser.c index 0645de3..2b557d4 100644 --- a/lib/lua/src/lparser.c +++ b/lib/lua/src/lparser.c @@ -1,1329 +1,1329 @@ -/* -** $Id: lparser.c,v 1.2 2003-12-11 16:53:30 pixel Exp $ -** Lua Parser -** See Copyright Notice in lua.h -*/ - - -#include <string.h> - -#define lparser_c - -#include "lua.h" - -#include "lcode.h" -#include "ldebug.h" -#include "lfunc.h" -#include "llex.h" -#include "lmem.h" -#include "lobject.h" -#include "lopcodes.h" -#include "lparser.h" -#include "lstate.h" -#include "lstring.h" - - - - -#define getlocvar(fs, i) ((fs)->f->locvars[(fs)->actvar[i]]) - - -#define enterlevel(ls) if (++(ls)->nestlevel > LUA_MAXPARSERLEVEL) \ - luaX_syntaxerror(ls, "too many syntax levels"); -#define leavelevel(ls) ((ls)->nestlevel--) - - -/* -** nodes for block list (list of active blocks) -*/ -typedef struct BlockCnt { - struct BlockCnt *previous; /* chain */ - int breaklist; /* list of jumps out of this loop */ - int nactvar; /* # active local variables outside the breakable structure */ - int upval; /* true if some variable in the block is an upvalue */ - int isbreakable; /* true if `block' is a loop */ -} BlockCnt; - - - -/* -** prototypes for recursive non-terminal functions -*/ -static void chunk (LexState *ls); -static void expr (LexState *ls, expdesc *v); - - - -static void next (LexState *ls) { - ls->lastline = ls->linenumber; - if (ls->lookahead.token != TK_EOS) { /* is there a look-ahead token? */ - ls->t = ls->lookahead; /* use this one */ - ls->lookahead.token = TK_EOS; /* and discharge it */ - } - else - ls->t.token = luaX_lex(ls, &ls->t.seminfo); /* read next token */ -} - - -static void lookahead (LexState *ls) { - lua_assert(ls->lookahead.token == TK_EOS); - ls->lookahead.token = luaX_lex(ls, &ls->lookahead.seminfo); -} - - -static void error_expected (LexState *ls, int token) { - luaX_syntaxerror(ls, - luaO_pushfstring(ls->L, "`%s' expected", luaX_token2str(ls, token))); -} - - -static int testnext (LexState *ls, int c) { - if (ls->t.token == c) { - next(ls); - return 1; - } - else return 0; -} - - -static void check (LexState *ls, int c) { - if (!testnext(ls, c)) - error_expected(ls, c); -} - - -#define check_condition(ls,c,msg) { if (!(c)) luaX_syntaxerror(ls, msg); } - - - -static void check_match (LexState *ls, int what, int who, int where) { - if (!testnext(ls, what)) { - if (where == ls->linenumber) - error_expected(ls, what); - else { - luaX_syntaxerror(ls, luaO_pushfstring(ls->L, - "`%s' expected (to close `%s' at line %d)", - luaX_token2str(ls, what), luaX_token2str(ls, who), where)); - } - } -} - - -static TString *str_checkname (LexState *ls) { - TString *ts; - check_condition(ls, (ls->t.token == TK_NAME), "<name> expected"); - ts = ls->t.seminfo.ts; - next(ls); - return ts; -} - - -static void init_exp (expdesc *e, expkind k, int i) { - e->f = e->t = NO_JUMP; - e->k = k; - e->info = i; -} - - -static void codestring (LexState *ls, expdesc *e, TString *s) { - init_exp(e, VK, luaK_stringK(ls->fs, s)); -} - - -static void checkname(LexState *ls, expdesc *e) { - codestring(ls, e, str_checkname(ls)); -} - - -static int luaI_registerlocalvar (LexState *ls, TString *varname) { - FuncState *fs = ls->fs; - Proto *f = fs->f; - luaM_growvector(ls->L, f->locvars, fs->nlocvars, f->sizelocvars, - LocVar, MAX_INT, ""); - f->locvars[fs->nlocvars].varname = varname; - return fs->nlocvars++; -} - - -static void new_localvar (LexState *ls, TString *name, int n) { - FuncState *fs = ls->fs; - luaX_checklimit(ls, fs->nactvar+n+1, MAXVARS, "local variables"); - fs->actvar[fs->nactvar+n] = luaI_registerlocalvar(ls, name); -} - - -static void adjustlocalvars (LexState *ls, int nvars) { - FuncState *fs = ls->fs; - fs->nactvar += nvars; - for (; nvars; nvars--) { - getlocvar(fs, fs->nactvar - nvars).startpc = fs->pc; - } -} - - -static void removevars (LexState *ls, int tolevel) { - FuncState *fs = ls->fs; - while (fs->nactvar > tolevel) - getlocvar(fs, --fs->nactvar).endpc = fs->pc; -} - - -static void new_localvarstr (LexState *ls, const char *name, int n) { - new_localvar(ls, luaS_new(ls->L, name), n); -} - - -static void create_local (LexState *ls, const char *name) { - new_localvarstr(ls, name, 0); - adjustlocalvars(ls, 1); -} - - -static int indexupvalue (FuncState *fs, TString *name, expdesc *v) { - int i; - Proto *f = fs->f; - for (i=0; i<f->nups; i++) { - if (fs->upvalues[i].k == v->k && fs->upvalues[i].info == v->info) { - lua_assert(fs->f->upvalues[i] == name); - return i; - } - } - /* new one */ - luaX_checklimit(fs->ls, f->nups + 1, MAXUPVALUES, "upvalues"); - luaM_growvector(fs->L, fs->f->upvalues, f->nups, fs->f->sizeupvalues, - TString *, MAX_INT, ""); - fs->f->upvalues[f->nups] = name; - fs->upvalues[f->nups] = *v; - return f->nups++; -} - - -static int searchvar (FuncState *fs, TString *n) { - int i; - for (i=fs->nactvar-1; i >= 0; i--) { - if (n == getlocvar(fs, i).varname) - return i; - } - return -1; /* not found */ -} - - -static void markupval (FuncState *fs, int level) { - BlockCnt *bl = fs->bl; - while (bl && bl->nactvar > level) bl = bl->previous; - if (bl) bl->upval = 1; -} - - -static void singlevaraux (FuncState *fs, TString *n, expdesc *var, int base) { - if (fs == NULL) /* no more levels? */ - init_exp(var, VGLOBAL, NO_REG); /* default is global variable */ - else { - int v = searchvar(fs, n); /* look up at current level */ - if (v >= 0) { - init_exp(var, VLOCAL, v); - if (!base) - markupval(fs, v); /* local will be used as an upval */ - } - else { /* not found at current level; try upper one */ - singlevaraux(fs->prev, n, var, 0); - if (var->k == VGLOBAL) { - if (base) - var->info = luaK_stringK(fs, n); /* info points to global name */ - } - else { /* LOCAL or UPVAL */ - var->info = indexupvalue(fs, n, var); - var->k = VUPVAL; /* upvalue in this level */ - } - } - } -} - - -static TString *singlevar (LexState *ls, expdesc *var, int base) { - TString *varname = str_checkname(ls); - singlevaraux(ls->fs, varname, var, base); - return varname; -} - - -static void adjust_assign (LexState *ls, int nvars, int nexps, expdesc *e) { - FuncState *fs = ls->fs; - int extra = nvars - nexps; - if (e->k == VCALL) { - extra++; /* includes call itself */ - if (extra <= 0) extra = 0; - else luaK_reserveregs(fs, extra-1); - luaK_setcallreturns(fs, e, extra); /* call provides the difference */ - } - else { - if (e->k != VVOID) luaK_exp2nextreg(fs, e); /* close last expression */ - if (extra > 0) { - int reg = fs->freereg; - luaK_reserveregs(fs, extra); - luaK_nil(fs, reg, extra); - } - } -} - - -static void code_params (LexState *ls, int nparams, int dots) { - FuncState *fs = ls->fs; - adjustlocalvars(ls, nparams); - luaX_checklimit(ls, fs->nactvar, MAXPARAMS, "parameters"); - fs->f->numparams = cast(lu_byte, fs->nactvar); - fs->f->is_vararg = cast(lu_byte, dots); - if (dots) - create_local(ls, "arg"); - luaK_reserveregs(fs, fs->nactvar); /* reserve register for parameters */ -} - - -static void enterblock (FuncState *fs, BlockCnt *bl, int isbreakable) { - bl->breaklist = NO_JUMP; - bl->isbreakable = isbreakable; - bl->nactvar = fs->nactvar; - bl->upval = 0; - bl->previous = fs->bl; - fs->bl = bl; - lua_assert(fs->freereg == fs->nactvar); -} - - -static void leaveblock (FuncState *fs) { - BlockCnt *bl = fs->bl; - fs->bl = bl->previous; - removevars(fs->ls, bl->nactvar); - if (bl->upval) - luaK_codeABC(fs, OP_CLOSE, bl->nactvar, 0, 0); - lua_assert(bl->nactvar == fs->nactvar); - fs->freereg = fs->nactvar; /* free registers */ - luaK_patchtohere(fs, bl->breaklist); -} - - -static void pushclosure (LexState *ls, FuncState *func, expdesc *v) { - FuncState *fs = ls->fs; - Proto *f = fs->f; - int i; - luaM_growvector(ls->L, f->p, fs->np, f->sizep, Proto *, - MAXARG_Bx, "constant table overflow"); - f->p[fs->np++] = func->f; - init_exp(v, VRELOCABLE, luaK_codeABx(fs, OP_CLOSURE, 0, fs->np-1)); - for (i=0; i<func->f->nups; i++) { - OpCode o = (func->upvalues[i].k == VLOCAL) ? OP_MOVE : OP_GETUPVAL; - luaK_codeABC(fs, o, 0, func->upvalues[i].info, 0); - } -} - - -static void open_func (LexState *ls, FuncState *fs) { - Proto *f = luaF_newproto(ls->L); - fs->f = f; - fs->prev = ls->fs; /* linked list of funcstates */ - fs->ls = ls; - fs->L = ls->L; - ls->fs = fs; - fs->pc = 0; - fs->lasttarget = 0; - fs->jpc = NO_JUMP; - fs->freereg = 0; - fs->nk = 0; - fs->h = luaH_new(ls->L, 0, 0); - fs->np = 0; - fs->nlocvars = 0; - fs->nactvar = 0; - fs->bl = NULL; - f->source = ls->source; - f->maxstacksize = 2; /* registers 0/1 are always valid */ -} - - -static void close_func (LexState *ls) { - lua_State *L = ls->L; - FuncState *fs = ls->fs; - Proto *f = fs->f; - removevars(ls, 0); - luaK_codeABC(fs, OP_RETURN, 0, 1, 0); /* final return */ - luaM_reallocvector(L, f->code, f->sizecode, fs->pc, Instruction); - f->sizecode = fs->pc; - luaM_reallocvector(L, f->lineinfo, f->sizelineinfo, fs->pc, int); - f->sizelineinfo = fs->pc; - luaM_reallocvector(L, f->k, f->sizek, fs->nk, TObject); - f->sizek = fs->nk; - luaM_reallocvector(L, f->p, f->sizep, fs->np, Proto *); - f->sizep = fs->np; - luaM_reallocvector(L, f->locvars, f->sizelocvars, fs->nlocvars, LocVar); - f->sizelocvars = fs->nlocvars; - luaM_reallocvector(L, f->upvalues, f->sizeupvalues, f->nups, TString *); - f->sizeupvalues = f->nups; - lua_assert(luaG_checkcode(f)); - lua_assert(fs->bl == NULL); - ls->fs = fs->prev; -} - - -Proto *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff) { - struct LexState lexstate; - struct FuncState funcstate; - lexstate.buff = buff; - lexstate.nestlevel = 0; - luaX_setinput(L, &lexstate, z, luaS_new(L, zname(z))); - open_func(&lexstate, &funcstate); - next(&lexstate); /* read first token */ - chunk(&lexstate); - check_condition(&lexstate, (lexstate.t.token == TK_EOS), "<eof> expected"); - close_func(&lexstate); - lua_assert(funcstate.prev == NULL); - lua_assert(funcstate.f->nups == 0); - lua_assert(lexstate.nestlevel == 0); - return funcstate.f; -} - - - -/*============================================================*/ -/* GRAMMAR RULES */ -/*============================================================*/ - - -static void luaY_field (LexState *ls, expdesc *v) { - /* field -> ['.' | ':'] NAME */ - FuncState *fs = ls->fs; - expdesc key; - luaK_exp2anyreg(fs, v); - next(ls); /* skip the dot or colon */ - checkname(ls, &key); - luaK_indexed(fs, v, &key); -} - - -static void luaY_index (LexState *ls, expdesc *v) { - /* index -> '[' expr ']' */ - next(ls); /* skip the '[' */ - expr(ls, v); - luaK_exp2val(ls->fs, v); - check(ls, ']'); -} - - -/* -** {====================================================================== -** Rules for Constructors -** ======================================================================= -*/ - - -struct ConsControl { - expdesc v; /* last list item read */ - expdesc *t; /* table descriptor */ - int nh; /* total number of `record' elements */ - int na; /* total number of array elements */ - int tostore; /* number of array elements pending to be stored */ -}; - - -static void recfield (LexState *ls, struct ConsControl *cc) { - /* recfield -> (NAME | `['exp1`]') = exp1 */ - FuncState *fs = ls->fs; - int reg = ls->fs->freereg; - expdesc key, val; - if (ls->t.token == TK_NAME) { - luaX_checklimit(ls, cc->nh, MAX_INT, "items in a constructor"); - cc->nh++; - checkname(ls, &key); - } - else /* ls->t.token == '[' */ - luaY_index(ls, &key); - check(ls, '='); - luaK_exp2RK(fs, &key); - expr(ls, &val); - luaK_codeABC(fs, OP_SETTABLE, cc->t->info, luaK_exp2RK(fs, &key), - luaK_exp2RK(fs, &val)); - fs->freereg = reg; /* free registers */ -} - - -static void closelistfield (FuncState *fs, struct ConsControl *cc) { - if (cc->v.k == VVOID) return; /* there is no list item */ - luaK_exp2nextreg(fs, &cc->v); - cc->v.k = VVOID; - if (cc->tostore == LFIELDS_PER_FLUSH) { - luaK_codeABx(fs, OP_SETLIST, cc->t->info, cc->na-1); /* flush */ - cc->tostore = 0; /* no more items pending */ - fs->freereg = cc->t->info + 1; /* free registers */ - } -} - - -static void lastlistfield (FuncState *fs, struct ConsControl *cc) { - if (cc->tostore == 0) return; - if (cc->v.k == VCALL) { - luaK_setcallreturns(fs, &cc->v, LUA_MULTRET); - luaK_codeABx(fs, OP_SETLISTO, cc->t->info, cc->na-1); - } - else { - if (cc->v.k != VVOID) - luaK_exp2nextreg(fs, &cc->v); - luaK_codeABx(fs, OP_SETLIST, cc->t->info, cc->na-1); - } - fs->freereg = cc->t->info + 1; /* free registers */ -} - - -static void listfield (LexState *ls, struct ConsControl *cc) { - expr(ls, &cc->v); - luaX_checklimit(ls, cc->na, MAXARG_Bx, "items in a constructor"); - cc->na++; - cc->tostore++; -} - - -static void constructor (LexState *ls, expdesc *t) { - /* constructor -> ?? */ - FuncState *fs = ls->fs; - int line = ls->linenumber; - int pc = luaK_codeABC(fs, OP_NEWTABLE, 0, 0, 0); - struct ConsControl cc; - cc.na = cc.nh = cc.tostore = 0; - cc.t = t; - init_exp(t, VRELOCABLE, pc); - init_exp(&cc.v, VVOID, 0); /* no value (yet) */ - luaK_exp2nextreg(ls->fs, t); /* fix it at stack top (for gc) */ - check(ls, '{'); - do { - lua_assert(cc.v.k == VVOID || cc.tostore > 0); - testnext(ls, ';'); /* compatibility only */ - if (ls->t.token == '}') break; - closelistfield(fs, &cc); - switch(ls->t.token) { - case TK_NAME: { /* may be listfields or recfields */ - lookahead(ls); - if (ls->lookahead.token != '=') /* expression? */ - listfield(ls, &cc); - else - recfield(ls, &cc); - break; - } - case '[': { /* constructor_item -> recfield */ - recfield(ls, &cc); - break; - } - default: { /* constructor_part -> listfield */ - listfield(ls, &cc); - break; - } - } - } while (testnext(ls, ',') || testnext(ls, ';')); - check_match(ls, '}', '{', line); - lastlistfield(fs, &cc); - SETARG_B(fs->f->code[pc], luaO_int2fb(cc.na)); /* set initial array size */ - SETARG_C(fs->f->code[pc], luaO_log2(cc.nh)+1); /* set initial table size */ -} - -/* }====================================================================== */ - - - -static void parlist (LexState *ls) { - /* parlist -> [ param { `,' param } ] */ - int nparams = 0; - int dots = 0; - if (ls->t.token != ')') { /* is `parlist' not empty? */ - do { - switch (ls->t.token) { - case TK_DOTS: dots = 1; next(ls); break; - case TK_NAME: new_localvar(ls, str_checkname(ls), nparams++); break; - default: luaX_syntaxerror(ls, "<name> or `...' expected"); - } - } while (!dots && testnext(ls, ',')); - } - code_params(ls, nparams, dots); -} - - -static void body (LexState *ls, expdesc *e, int needself, int line) { - /* body -> `(' parlist `)' chunk END */ - FuncState new_fs; - open_func(ls, &new_fs); - new_fs.f->lineDefined = line; - check(ls, '('); - if (needself) - create_local(ls, "self"); - parlist(ls); - check(ls, ')'); - chunk(ls); - check_match(ls, TK_END, TK_FUNCTION, line); - close_func(ls); - pushclosure(ls, &new_fs, e); -} - - -static int explist1 (LexState *ls, expdesc *v) { - /* explist1 -> expr { `,' expr } */ - int n = 1; /* at least one expression */ - expr(ls, v); - while (testnext(ls, ',')) { - luaK_exp2nextreg(ls->fs, v); - expr(ls, v); - n++; - } - return n; -} - - -static void funcargs (LexState *ls, expdesc *f) { - FuncState *fs = ls->fs; - expdesc args; - int base, nparams; - int line = ls->linenumber; - switch (ls->t.token) { - case '(': { /* funcargs -> `(' [ explist1 ] `)' */ - if (line != ls->lastline) - luaX_syntaxerror(ls,"ambiguous syntax (function call x new statement)"); - next(ls); - if (ls->t.token == ')') /* arg list is empty? */ - args.k = VVOID; - else { - explist1(ls, &args); - luaK_setcallreturns(fs, &args, LUA_MULTRET); - } - check_match(ls, ')', '(', line); - break; - } - case '{': { /* funcargs -> constructor */ - constructor(ls, &args); - break; - } - case TK_STRING: { /* funcargs -> STRING */ - codestring(ls, &args, ls->t.seminfo.ts); - next(ls); /* must use `seminfo' before `next' */ - break; - } - default: { - luaX_syntaxerror(ls, "function arguments expected"); - return; - } - } - lua_assert(f->k == VNONRELOC); - base = f->info; /* base register for call */ - if (args.k == VCALL) - nparams = LUA_MULTRET; /* open call */ - else { - if (args.k != VVOID) - luaK_exp2nextreg(fs, &args); /* close last argument */ - nparams = fs->freereg - (base+1); - } - init_exp(f, VCALL, luaK_codeABC(fs, OP_CALL, base, nparams+1, 2)); - luaK_fixline(fs, line); - fs->freereg = base+1; /* call remove function and arguments and leaves - (unless changed) one result */ -} - - - - -/* -** {====================================================================== -** Expression parsing -** ======================================================================= -*/ - - -static void prefixexp (LexState *ls, expdesc *v) { - /* prefixexp -> NAME | '(' expr ')' */ - switch (ls->t.token) { - case '(': { - int line = ls->linenumber; - next(ls); - expr(ls, v); - check_match(ls, ')', '(', line); - luaK_dischargevars(ls->fs, v); - return; - } - case TK_NAME: { - singlevar(ls, v, 1); - return; - } -#ifdef LUA_COMPATUPSYNTAX - case '%': { /* for compatibility only */ - TString *varname; - int line = ls->linenumber; - next(ls); /* skip `%' */ - varname = singlevar(ls, v, 1); - if (v->k != VUPVAL) - luaX_errorline(ls, "global upvalues are obsolete", - getstr(varname), line); - return; - } -#endif - default: { - luaX_syntaxerror(ls, "unexpected symbol"); - return; - } - } -} - - -static void primaryexp (LexState *ls, expdesc *v) { - /* primaryexp -> - prefixexp { `.' NAME | `[' exp `]' | `:' NAME funcargs | funcargs } */ - FuncState *fs = ls->fs; - prefixexp(ls, v); - for (;;) { - switch (ls->t.token) { - case '.': { /* field */ - luaY_field(ls, v); - break; - } - case '[': { /* `[' exp1 `]' */ - expdesc key; - luaK_exp2anyreg(fs, v); - luaY_index(ls, &key); - luaK_indexed(fs, v, &key); - break; - } - case ':': { /* `:' NAME funcargs */ - expdesc key; - next(ls); - checkname(ls, &key); - luaK_self(fs, v, &key); - funcargs(ls, v); - break; - } - case '(': case TK_STRING: case '{': { /* funcargs */ - luaK_exp2nextreg(fs, v); - funcargs(ls, v); - break; - } - default: return; - } - } -} - - -static void simpleexp (LexState *ls, expdesc *v) { - /* simpleexp -> NUMBER | STRING | NIL | constructor | FUNCTION body - | primaryexp */ - switch (ls->t.token) { - case TK_NUMBER: { - init_exp(v, VK, luaK_numberK(ls->fs, ls->t.seminfo.r)); - next(ls); /* must use `seminfo' before `next' */ - break; - } - case TK_STRING: { - codestring(ls, v, ls->t.seminfo.ts); - next(ls); /* must use `seminfo' before `next' */ - break; - } - case TK_NIL: { - init_exp(v, VNIL, 0); - next(ls); - break; - } - case TK_TRUE: { - init_exp(v, VTRUE, 0); - next(ls); - break; - } - case TK_FALSE: { - init_exp(v, VFALSE, 0); - next(ls); - break; - } - case '{': { /* constructor */ - constructor(ls, v); - break; - } - case TK_FUNCTION: { - next(ls); - body(ls, v, 0, ls->linenumber); - break; - } - default: { - primaryexp(ls, v); - break; - } - } -} - - -static UnOpr getunopr (int op) { - switch (op) { - case TK_NOT: return OPR_NOT; - case '-': return OPR_MINUS; - default: return OPR_NOUNOPR; - } -} - - -static BinOpr getbinopr (int op) { - switch (op) { - case '+': return OPR_ADD; - case '-': return OPR_SUB; - case '*': return OPR_MULT; - case '/': return OPR_DIV; - case '^': return OPR_POW; - case TK_CONCAT: return OPR_CONCAT; - case TK_NE: return OPR_NE; - case TK_EQ: return OPR_EQ; - case '<': return OPR_LT; - case TK_LE: return OPR_LE; - case '>': return OPR_GT; - case TK_GE: return OPR_GE; - case TK_AND: return OPR_AND; - case TK_OR: return OPR_OR; - default: return OPR_NOBINOPR; - } -} - - -static const struct { - lu_byte left; /* left priority for each binary operator */ - lu_byte right; /* right priority */ -} priority[] = { /* ORDER OPR */ - {6, 6}, {6, 6}, {7, 7}, {7, 7}, /* arithmetic */ - {10, 9}, {5, 4}, /* power and concat (right associative) */ - {3, 3}, {3, 3}, /* equality */ - {3, 3}, {3, 3}, {3, 3}, {3, 3}, /* order */ - {2, 2}, {1, 1} /* logical (and/or) */ -}; - -#define UNARY_PRIORITY 8 /* priority for unary operators */ - - -/* -** subexpr -> (simplexep | unop subexpr) { binop subexpr } -** where `binop' is any binary operator with a priority higher than `limit' -*/ -static BinOpr subexpr (LexState *ls, expdesc *v, int limit) { - BinOpr op; - UnOpr uop; - enterlevel(ls); - uop = getunopr(ls->t.token); - if (uop != OPR_NOUNOPR) { - next(ls); - subexpr(ls, v, UNARY_PRIORITY); - luaK_prefix(ls->fs, uop, v); - } - else simpleexp(ls, v); - /* expand while operators have priorities higher than `limit' */ - op = getbinopr(ls->t.token); - while (op != OPR_NOBINOPR && cast(int, priority[op].left) > limit) { - expdesc v2; - BinOpr nextop; - next(ls); - luaK_infix(ls->fs, op, v); - /* read sub-expression with higher priority */ - nextop = subexpr(ls, &v2, cast(int, priority[op].right)); - luaK_posfix(ls->fs, op, v, &v2); - op = nextop; - } - leavelevel(ls); - return op; /* return first untreated operator */ -} - - -static void expr (LexState *ls, expdesc *v) { - subexpr(ls, v, -1); -} - -/* }==================================================================== */ - - - -/* -** {====================================================================== -** Rules for Statements -** ======================================================================= -*/ - - -static int block_follow (int token) { - switch (token) { - case TK_ELSE: case TK_ELSEIF: case TK_END: - case TK_UNTIL: case TK_EOS: - return 1; - default: return 0; - } -} - - -static void block (LexState *ls) { - /* block -> chunk */ - FuncState *fs = ls->fs; - BlockCnt bl; - enterblock(fs, &bl, 0); - chunk(ls); - lua_assert(bl.breaklist == NO_JUMP); - leaveblock(fs); -} - - -/* -** structure to chain all variables in the left-hand side of an -** assignment -*/ -struct LHS_assign { - struct LHS_assign *prev; - expdesc v; /* variable (global, local, upvalue, or indexed) */ -}; - - -/* -** check whether, in an assignment to a local variable, the local variable -** is needed in a previous assignment (to a table). If so, save original -** local value in a safe place and use this safe copy in the previous -** assignment. -*/ -static void check_conflict (LexState *ls, struct LHS_assign *lh, expdesc *v) { - FuncState *fs = ls->fs; - int extra = fs->freereg; /* eventual position to save local variable */ - int conflict = 0; - for (; lh; lh = lh->prev) { - if (lh->v.k == VINDEXED) { - if (lh->v.info == v->info) { /* conflict? */ - conflict = 1; - lh->v.info = extra; /* previous assignment will use safe copy */ - } - if (lh->v.aux == v->info) { /* conflict? */ - conflict = 1; - lh->v.aux = extra; /* previous assignment will use safe copy */ - } - } - } - if (conflict) { - luaK_codeABC(fs, OP_MOVE, fs->freereg, v->info, 0); /* make copy */ - luaK_reserveregs(fs, 1); - } -} - - -static void assignment (LexState *ls, struct LHS_assign *lh, int nvars) { - expdesc e; - check_condition(ls, VLOCAL <= lh->v.k && lh->v.k <= VINDEXED, - "syntax error"); - if (testnext(ls, ',')) { /* assignment -> `,' primaryexp assignment */ - struct LHS_assign nv; - nv.prev = lh; - primaryexp(ls, &nv.v); - if (nv.v.k == VLOCAL) - check_conflict(ls, lh, &nv.v); - assignment(ls, &nv, nvars+1); - } - else { /* assignment -> `=' explist1 */ - int nexps; - check(ls, '='); - nexps = explist1(ls, &e); - if (nexps != nvars) { - adjust_assign(ls, nvars, nexps, &e); - if (nexps > nvars) - ls->fs->freereg -= nexps - nvars; /* remove extra values */ - } - else { - luaK_setcallreturns(ls->fs, &e, 1); /* close last expression */ - luaK_storevar(ls->fs, &lh->v, &e); - return; /* avoid default */ - } - } - init_exp(&e, VNONRELOC, ls->fs->freereg-1); /* default assignment */ - luaK_storevar(ls->fs, &lh->v, &e); -} - - -static void cond (LexState *ls, expdesc *v) { - /* cond -> exp */ - expr(ls, v); /* read condition */ - if (v->k == VNIL) v->k = VFALSE; /* `falses' are all equal here */ - luaK_goiftrue(ls->fs, v); - luaK_patchtohere(ls->fs, v->t); -} - - -/* -** The while statement optimizes its code by coding the condition -** after its body (and thus avoiding one jump in the loop). -*/ - -/* -** maximum size of expressions for optimizing `while' code -*/ -#ifndef MAXEXPWHILE -#define MAXEXPWHILE 100 -#endif - -/* -** the call `luaK_goiffalse' may grow the size of an expression by -** at most this: -*/ -#define EXTRAEXP 5 - -static void whilestat (LexState *ls, int line) { - /* whilestat -> WHILE cond DO block END */ - Instruction codeexp[MAXEXPWHILE + EXTRAEXP]; - int lineexp; - int i; - int sizeexp; - FuncState *fs = ls->fs; - int whileinit, blockinit, expinit; - expdesc v; - BlockCnt bl; - next(ls); /* skip WHILE */ - whileinit = luaK_jump(fs); /* jump to condition (which will be moved) */ - expinit = luaK_getlabel(fs); - expr(ls, &v); /* parse condition */ - if (v.k == VK) v.k = VTRUE; /* `trues' are all equal here */ - lineexp = ls->linenumber; - luaK_goiffalse(fs, &v); - luaK_concat(fs, &v.f, fs->jpc); - fs->jpc = NO_JUMP; - sizeexp = fs->pc - expinit; /* size of expression code */ - if (sizeexp > MAXEXPWHILE) - luaX_syntaxerror(ls, "`while' condition too complex"); - for (i = 0; i < sizeexp; i++) /* save `exp' code */ - codeexp[i] = fs->f->code[expinit + i]; - fs->pc = expinit; /* remove `exp' code */ - enterblock(fs, &bl, 1); - check(ls, TK_DO); - blockinit = luaK_getlabel(fs); - block(ls); - luaK_patchtohere(fs, whileinit); /* initial jump jumps to here */ - /* move `exp' back to code */ - if (v.t != NO_JUMP) v.t += fs->pc - expinit; - if (v.f != NO_JUMP) v.f += fs->pc - expinit; - for (i=0; i<sizeexp; i++) - luaK_code(fs, codeexp[i], lineexp); - check_match(ls, TK_END, TK_WHILE, line); - leaveblock(fs); - luaK_patchlist(fs, v.t, blockinit); /* true conditions go back to loop */ - luaK_patchtohere(fs, v.f); /* false conditions finish the loop */ -} - - -static void repeatstat (LexState *ls, int line) { - /* repeatstat -> REPEAT block UNTIL cond */ - FuncState *fs = ls->fs; - int repeat_init = luaK_getlabel(fs); - expdesc v; - BlockCnt bl; - enterblock(fs, &bl, 1); - next(ls); - block(ls); - check_match(ls, TK_UNTIL, TK_REPEAT, line); - cond(ls, &v); - luaK_patchlist(fs, v.f, repeat_init); - leaveblock(fs); -} - - -static int exp1 (LexState *ls) { - expdesc e; - int k; - expr(ls, &e); - k = e.k; - luaK_exp2nextreg(ls->fs, &e); - return k; -} - - -static void forbody (LexState *ls, int base, int line, int nvars, int isnum) { - BlockCnt bl; - FuncState *fs = ls->fs; - int prep, endfor; - adjustlocalvars(ls, nvars); /* scope for all variables */ - check(ls, TK_DO); - enterblock(fs, &bl, 1); /* loop block */ - prep = luaK_getlabel(fs); - block(ls); - luaK_patchtohere(fs, prep-1); - endfor = (isnum) ? luaK_codeAsBx(fs, OP_FORLOOP, base, NO_JUMP) : - luaK_codeABC(fs, OP_TFORLOOP, base, 0, nvars - 3); - luaK_fixline(fs, line); /* pretend that `OP_FOR' starts the loop */ - luaK_patchlist(fs, (isnum) ? endfor : luaK_jump(fs), prep); - leaveblock(fs); -} - - -static void fornum (LexState *ls, TString *varname, int line) { - /* fornum -> NAME = exp1,exp1[,exp1] DO body */ - FuncState *fs = ls->fs; - int base = fs->freereg; - new_localvar(ls, varname, 0); - new_localvarstr(ls, "(for limit)", 1); - new_localvarstr(ls, "(for step)", 2); - check(ls, '='); - exp1(ls); /* initial value */ - check(ls, ','); - exp1(ls); /* limit */ - if (testnext(ls, ',')) - exp1(ls); /* optional step */ - else { /* default step = 1 */ - luaK_codeABx(fs, OP_LOADK, fs->freereg, luaK_numberK(fs, 1)); - luaK_reserveregs(fs, 1); - } - luaK_codeABC(fs, OP_SUB, fs->freereg - 3, fs->freereg - 3, fs->freereg - 1); - luaK_jump(fs); - forbody(ls, base, line, 3, 1); -} - - -static void forlist (LexState *ls, TString *indexname) { - /* forlist -> NAME {,NAME} IN explist1 DO body */ - FuncState *fs = ls->fs; - expdesc e; - int nvars = 0; - int line; - int base = fs->freereg; - new_localvarstr(ls, "(for generator)", nvars++); - new_localvarstr(ls, "(for state)", nvars++); - new_localvar(ls, indexname, nvars++); - while (testnext(ls, ',')) - new_localvar(ls, str_checkname(ls), nvars++); - check(ls, TK_IN); - line = ls->linenumber; - adjust_assign(ls, nvars, explist1(ls, &e), &e); - luaK_checkstack(fs, 3); /* extra space to call generator */ - luaK_codeAsBx(fs, OP_TFORPREP, base, NO_JUMP); - forbody(ls, base, line, nvars, 0); -} - - -static void forstat (LexState *ls, int line) { - /* forstat -> fornum | forlist */ - FuncState *fs = ls->fs; - TString *varname; - BlockCnt bl; - enterblock(fs, &bl, 0); /* block to control variable scope */ - next(ls); /* skip `for' */ - varname = str_checkname(ls); /* first variable name */ - switch (ls->t.token) { - case '=': fornum(ls, varname, line); break; - case ',': case TK_IN: forlist(ls, varname); break; - default: luaX_syntaxerror(ls, "`=' or `in' expected"); - } - check_match(ls, TK_END, TK_FOR, line); - leaveblock(fs); -} - - -static void test_then_block (LexState *ls, expdesc *v) { - /* test_then_block -> [IF | ELSEIF] cond THEN block */ - next(ls); /* skip IF or ELSEIF */ - cond(ls, v); - check(ls, TK_THEN); - block(ls); /* `then' part */ -} - - -static void ifstat (LexState *ls, int line) { - /* ifstat -> IF cond THEN block {ELSEIF cond THEN block} [ELSE block] END */ - FuncState *fs = ls->fs; - expdesc v; - int escapelist = NO_JUMP; - test_then_block(ls, &v); /* IF cond THEN block */ - while (ls->t.token == TK_ELSEIF) { - luaK_concat(fs, &escapelist, luaK_jump(fs)); - luaK_patchtohere(fs, v.f); - test_then_block(ls, &v); /* ELSEIF cond THEN block */ - } - if (ls->t.token == TK_ELSE) { - luaK_concat(fs, &escapelist, luaK_jump(fs)); - luaK_patchtohere(fs, v.f); - next(ls); /* skip ELSE (after patch, for correct line info) */ - block(ls); /* `else' part */ - } - else - luaK_concat(fs, &escapelist, v.f); - luaK_patchtohere(fs, escapelist); - check_match(ls, TK_END, TK_IF, line); -} - - -static void localfunc (LexState *ls) { - expdesc v, b; - new_localvar(ls, str_checkname(ls), 0); - init_exp(&v, VLOCAL, ls->fs->freereg++); - adjustlocalvars(ls, 1); - body(ls, &b, 0, ls->linenumber); - luaK_storevar(ls->fs, &v, &b); -} - - -static void localstat (LexState *ls) { - /* stat -> LOCAL NAME {`,' NAME} [`=' explist1] */ - int nvars = 0; - int nexps; - expdesc e; - do { - new_localvar(ls, str_checkname(ls), nvars++); - } while (testnext(ls, ',')); - if (testnext(ls, '=')) - nexps = explist1(ls, &e); - else { - e.k = VVOID; - nexps = 0; - } - adjust_assign(ls, nvars, nexps, &e); - adjustlocalvars(ls, nvars); -} - - -static int funcname (LexState *ls, expdesc *v) { - /* funcname -> NAME {field} [`:' NAME] */ - int needself = 0; - singlevar(ls, v, 1); - while (ls->t.token == '.') - luaY_field(ls, v); - if (ls->t.token == ':') { - needself = 1; - luaY_field(ls, v); - } - return needself; -} - - -static void funcstat (LexState *ls, int line) { - /* funcstat -> FUNCTION funcname body */ - int needself; - expdesc v, b; - next(ls); /* skip FUNCTION */ - needself = funcname(ls, &v); - body(ls, &b, needself, line); - luaK_storevar(ls->fs, &v, &b); - luaK_fixline(ls->fs, line); /* definition `happens' in the first line */ -} - - -static void exprstat (LexState *ls) { - /* stat -> func | assignment */ - FuncState *fs = ls->fs; - struct LHS_assign v; - primaryexp(ls, &v.v); - if (v.v.k == VCALL) { /* stat -> func */ - luaK_setcallreturns(fs, &v.v, 0); /* call statement uses no results */ - } - else { /* stat -> assignment */ - v.prev = NULL; - assignment(ls, &v, 1); - } -} - - -static void retstat (LexState *ls) { - /* stat -> RETURN explist */ - FuncState *fs = ls->fs; - expdesc e; - int first, nret; /* registers with returned values */ - next(ls); /* skip RETURN */ - if (block_follow(ls->t.token) || ls->t.token == ';') - first = nret = 0; /* return no values */ - else { - nret = explist1(ls, &e); /* optional return values */ - if (e.k == VCALL) { - luaK_setcallreturns(fs, &e, LUA_MULTRET); - if (nret == 1) { /* tail call? */ - SET_OPCODE(getcode(fs,&e), OP_TAILCALL); - lua_assert(GETARG_A(getcode(fs,&e)) == fs->nactvar); - } - first = fs->nactvar; - nret = LUA_MULTRET; /* return all values */ - } - else { - if (nret == 1) /* only one single value? */ - first = luaK_exp2anyreg(fs, &e); - else { - luaK_exp2nextreg(fs, &e); /* values must go to the `stack' */ - first = fs->nactvar; /* return all `active' values */ - lua_assert(nret == fs->freereg - first); - } - } - } - luaK_codeABC(fs, OP_RETURN, first, nret+1, 0); -} - - -static void breakstat (LexState *ls) { - /* stat -> BREAK [NAME] */ - FuncState *fs = ls->fs; - BlockCnt *bl = fs->bl; - int upval = 0; - next(ls); /* skip BREAK */ - while (bl && !bl->isbreakable) { - upval |= bl->upval; - bl = bl->previous; - } - if (!bl) - luaX_syntaxerror(ls, "no loop to break"); - if (upval) - luaK_codeABC(fs, OP_CLOSE, bl->nactvar, 0, 0); - luaK_concat(fs, &bl->breaklist, luaK_jump(fs)); -} - - -static int statement (LexState *ls) { - int line = ls->linenumber; /* may be needed for error messages */ - switch (ls->t.token) { - case TK_IF: { /* stat -> ifstat */ - ifstat(ls, line); - return 0; - } - case TK_WHILE: { /* stat -> whilestat */ - whilestat(ls, line); - return 0; - } - case TK_DO: { /* stat -> DO block END */ - next(ls); /* skip DO */ - block(ls); - check_match(ls, TK_END, TK_DO, line); - return 0; - } - case TK_FOR: { /* stat -> forstat */ - forstat(ls, line); - return 0; - } - case TK_REPEAT: { /* stat -> repeatstat */ - repeatstat(ls, line); - return 0; - } - case TK_FUNCTION: { - funcstat(ls, line); /* stat -> funcstat */ - return 0; - } - case TK_LOCAL: { /* stat -> localstat */ - next(ls); /* skip LOCAL */ - if (testnext(ls, TK_FUNCTION)) /* local function? */ - localfunc(ls); - else - localstat(ls); - return 0; - } - case TK_RETURN: { /* stat -> retstat */ - retstat(ls); - return 1; /* must be last statement */ - } - case TK_BREAK: { /* stat -> breakstat */ - breakstat(ls); - return 1; /* must be last statement */ - } - default: { - exprstat(ls); - return 0; /* to avoid warnings */ - } - } -} - - -static void chunk (LexState *ls) { - /* chunk -> { stat [`;'] } */ - int islast = 0; - enterlevel(ls); - while (!islast && !block_follow(ls->t.token)) { - islast = statement(ls); - testnext(ls, ';'); - lua_assert(ls->fs->freereg >= ls->fs->nactvar); - ls->fs->freereg = ls->fs->nactvar; /* free registers */ - } - leavelevel(ls); -} - -/* }====================================================================== */ +/*
+** $Id: lparser.c,v 1.3 2004-11-27 21:35:20 pixel Exp $
+** Lua Parser
+** See Copyright Notice in lua.h
+*/
+
+
+#include <string.h>
+
+#define lparser_c
+
+#include "lua.h"
+
+#include "lcode.h"
+#include "ldebug.h"
+#include "lfunc.h"
+#include "llex.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lparser.h"
+#include "lstate.h"
+#include "lstring.h"
+
+
+
+
+#define getlocvar(fs, i) ((fs)->f->locvars[(fs)->actvar[i]])
+
+
+#define enterlevel(ls) if (++(ls)->nestlevel > LUA_MAXPARSERLEVEL) \
+ luaX_syntaxerror(ls, "too many syntax levels");
+#define leavelevel(ls) ((ls)->nestlevel--)
+
+
+/*
+** nodes for block list (list of active blocks)
+*/
+typedef struct BlockCnt {
+ struct BlockCnt *previous; /* chain */
+ int breaklist; /* list of jumps out of this loop */
+ int nactvar; /* # active local variables outside the breakable structure */
+ int upval; /* true if some variable in the block is an upvalue */
+ int isbreakable; /* true if `block' is a loop */
+} BlockCnt;
+
+
+
+/*
+** prototypes for recursive non-terminal functions
+*/
+static void chunk (LexState *ls);
+static void expr (LexState *ls, expdesc *v);
+
+
+
+static void next (LexState *ls) {
+ ls->lastline = ls->linenumber;
+ if (ls->lookahead.token != TK_EOS) { /* is there a look-ahead token? */
+ ls->t = ls->lookahead; /* use this one */
+ ls->lookahead.token = TK_EOS; /* and discharge it */
+ }
+ else
+ ls->t.token = luaX_lex(ls, &ls->t.seminfo); /* read next token */
+}
+
+
+static void lookahead (LexState *ls) {
+ lua_assert(ls->lookahead.token == TK_EOS);
+ ls->lookahead.token = luaX_lex(ls, &ls->lookahead.seminfo);
+}
+
+
+static void error_expected (LexState *ls, int token) {
+ luaX_syntaxerror(ls,
+ luaO_pushfstring(ls->L, "`%s' expected", luaX_token2str(ls, token)));
+}
+
+
+static int testnext (LexState *ls, int c) {
+ if (ls->t.token == c) {
+ next(ls);
+ return 1;
+ }
+ else return 0;
+}
+
+
+static void check (LexState *ls, int c) {
+ if (!testnext(ls, c))
+ error_expected(ls, c);
+}
+
+
+#define check_condition(ls,c,msg) { if (!(c)) luaX_syntaxerror(ls, msg); }
+
+
+
+static void check_match (LexState *ls, int what, int who, int where) {
+ if (!testnext(ls, what)) {
+ if (where == ls->linenumber)
+ error_expected(ls, what);
+ else {
+ luaX_syntaxerror(ls, luaO_pushfstring(ls->L,
+ "`%s' expected (to close `%s' at line %d)",
+ luaX_token2str(ls, what), luaX_token2str(ls, who), where));
+ }
+ }
+}
+
+
+static TString *str_checkname (LexState *ls) {
+ TString *ts;
+ check_condition(ls, (ls->t.token == TK_NAME), "<name> expected");
+ ts = ls->t.seminfo.ts;
+ next(ls);
+ return ts;
+}
+
+
+static void init_exp (expdesc *e, expkind k, int i) {
+ e->f = e->t = NO_JUMP;
+ e->k = k;
+ e->info = i;
+}
+
+
+static void codestring (LexState *ls, expdesc *e, TString *s) {
+ init_exp(e, VK, luaK_stringK(ls->fs, s));
+}
+
+
+static void checkname(LexState *ls, expdesc *e) {
+ codestring(ls, e, str_checkname(ls));
+}
+
+
+static int luaI_registerlocalvar (LexState *ls, TString *varname) {
+ FuncState *fs = ls->fs;
+ Proto *f = fs->f;
+ luaM_growvector(ls->L, f->locvars, fs->nlocvars, f->sizelocvars,
+ LocVar, MAX_INT, "");
+ f->locvars[fs->nlocvars].varname = varname;
+ return fs->nlocvars++;
+}
+
+
+static void new_localvar (LexState *ls, TString *name, int n) {
+ FuncState *fs = ls->fs;
+ luaX_checklimit(ls, fs->nactvar+n+1, MAXVARS, "local variables");
+ fs->actvar[fs->nactvar+n] = luaI_registerlocalvar(ls, name);
+}
+
+
+static void adjustlocalvars (LexState *ls, int nvars) {
+ FuncState *fs = ls->fs;
+ fs->nactvar += nvars;
+ for (; nvars; nvars--) {
+ getlocvar(fs, fs->nactvar - nvars).startpc = fs->pc;
+ }
+}
+
+
+static void removevars (LexState *ls, int tolevel) {
+ FuncState *fs = ls->fs;
+ while (fs->nactvar > tolevel)
+ getlocvar(fs, --fs->nactvar).endpc = fs->pc;
+}
+
+
+static void new_localvarstr (LexState *ls, const char *name, int n) {
+ new_localvar(ls, luaS_new(ls->L, name), n);
+}
+
+
+static void create_local (LexState *ls, const char *name) {
+ new_localvarstr(ls, name, 0);
+ adjustlocalvars(ls, 1);
+}
+
+
+static int indexupvalue (FuncState *fs, TString *name, expdesc *v) {
+ int i;
+ Proto *f = fs->f;
+ for (i=0; i<f->nups; i++) {
+ if (fs->upvalues[i].k == v->k && fs->upvalues[i].info == v->info) {
+ lua_assert(fs->f->upvalues[i] == name);
+ return i;
+ }
+ }
+ /* new one */
+ luaX_checklimit(fs->ls, f->nups + 1, MAXUPVALUES, "upvalues");
+ luaM_growvector(fs->L, fs->f->upvalues, f->nups, fs->f->sizeupvalues,
+ TString *, MAX_INT, "");
+ fs->f->upvalues[f->nups] = name;
+ fs->upvalues[f->nups] = *v;
+ return f->nups++;
+}
+
+
+static int searchvar (FuncState *fs, TString *n) {
+ int i;
+ for (i=fs->nactvar-1; i >= 0; i--) {
+ if (n == getlocvar(fs, i).varname)
+ return i;
+ }
+ return -1; /* not found */
+}
+
+
+static void markupval (FuncState *fs, int level) {
+ BlockCnt *bl = fs->bl;
+ while (bl && bl->nactvar > level) bl = bl->previous;
+ if (bl) bl->upval = 1;
+}
+
+
+static void singlevaraux (FuncState *fs, TString *n, expdesc *var, int base) {
+ if (fs == NULL) /* no more levels? */
+ init_exp(var, VGLOBAL, NO_REG); /* default is global variable */
+ else {
+ int v = searchvar(fs, n); /* look up at current level */
+ if (v >= 0) {
+ init_exp(var, VLOCAL, v);
+ if (!base)
+ markupval(fs, v); /* local will be used as an upval */
+ }
+ else { /* not found at current level; try upper one */
+ singlevaraux(fs->prev, n, var, 0);
+ if (var->k == VGLOBAL) {
+ if (base)
+ var->info = luaK_stringK(fs, n); /* info points to global name */
+ }
+ else { /* LOCAL or UPVAL */
+ var->info = indexupvalue(fs, n, var);
+ var->k = VUPVAL; /* upvalue in this level */
+ }
+ }
+ }
+}
+
+
+static TString *singlevar (LexState *ls, expdesc *var, int base) {
+ TString *varname = str_checkname(ls);
+ singlevaraux(ls->fs, varname, var, base);
+ return varname;
+}
+
+
+static void adjust_assign (LexState *ls, int nvars, int nexps, expdesc *e) {
+ FuncState *fs = ls->fs;
+ int extra = nvars - nexps;
+ if (e->k == VCALL) {
+ extra++; /* includes call itself */
+ if (extra <= 0) extra = 0;
+ else luaK_reserveregs(fs, extra-1);
+ luaK_setcallreturns(fs, e, extra); /* call provides the difference */
+ }
+ else {
+ if (e->k != VVOID) luaK_exp2nextreg(fs, e); /* close last expression */
+ if (extra > 0) {
+ int reg = fs->freereg;
+ luaK_reserveregs(fs, extra);
+ luaK_nil(fs, reg, extra);
+ }
+ }
+}
+
+
+static void code_params (LexState *ls, int nparams, int dots) {
+ FuncState *fs = ls->fs;
+ adjustlocalvars(ls, nparams);
+ luaX_checklimit(ls, fs->nactvar, MAXPARAMS, "parameters");
+ fs->f->numparams = cast(lu_byte, fs->nactvar);
+ fs->f->is_vararg = cast(lu_byte, dots);
+ if (dots)
+ create_local(ls, "arg");
+ luaK_reserveregs(fs, fs->nactvar); /* reserve register for parameters */
+}
+
+
+static void enterblock (FuncState *fs, BlockCnt *bl, int isbreakable) {
+ bl->breaklist = NO_JUMP;
+ bl->isbreakable = isbreakable;
+ bl->nactvar = fs->nactvar;
+ bl->upval = 0;
+ bl->previous = fs->bl;
+ fs->bl = bl;
+ lua_assert(fs->freereg == fs->nactvar);
+}
+
+
+static void leaveblock (FuncState *fs) {
+ BlockCnt *bl = fs->bl;
+ fs->bl = bl->previous;
+ removevars(fs->ls, bl->nactvar);
+ if (bl->upval)
+ luaK_codeABC(fs, OP_CLOSE, bl->nactvar, 0, 0);
+ lua_assert(bl->nactvar == fs->nactvar);
+ fs->freereg = fs->nactvar; /* free registers */
+ luaK_patchtohere(fs, bl->breaklist);
+}
+
+
+static void pushclosure (LexState *ls, FuncState *func, expdesc *v) {
+ FuncState *fs = ls->fs;
+ Proto *f = fs->f;
+ int i;
+ luaM_growvector(ls->L, f->p, fs->np, f->sizep, Proto *,
+ MAXARG_Bx, "constant table overflow");
+ f->p[fs->np++] = func->f;
+ init_exp(v, VRELOCABLE, luaK_codeABx(fs, OP_CLOSURE, 0, fs->np-1));
+ for (i=0; i<func->f->nups; i++) {
+ OpCode o = (func->upvalues[i].k == VLOCAL) ? OP_MOVE : OP_GETUPVAL;
+ luaK_codeABC(fs, o, 0, func->upvalues[i].info, 0);
+ }
+}
+
+
+static void open_func (LexState *ls, FuncState *fs) {
+ Proto *f = luaF_newproto(ls->L);
+ fs->f = f;
+ fs->prev = ls->fs; /* linked list of funcstates */
+ fs->ls = ls;
+ fs->L = ls->L;
+ ls->fs = fs;
+ fs->pc = 0;
+ fs->lasttarget = 0;
+ fs->jpc = NO_JUMP;
+ fs->freereg = 0;
+ fs->nk = 0;
+ fs->h = luaH_new(ls->L, 0, 0);
+ fs->np = 0;
+ fs->nlocvars = 0;
+ fs->nactvar = 0;
+ fs->bl = NULL;
+ f->source = ls->source;
+ f->maxstacksize = 2; /* registers 0/1 are always valid */
+}
+
+
+static void close_func (LexState *ls) {
+ lua_State *L = ls->L;
+ FuncState *fs = ls->fs;
+ Proto *f = fs->f;
+ removevars(ls, 0);
+ luaK_codeABC(fs, OP_RETURN, 0, 1, 0); /* final return */
+ luaM_reallocvector(L, f->code, f->sizecode, fs->pc, Instruction);
+ f->sizecode = fs->pc;
+ luaM_reallocvector(L, f->lineinfo, f->sizelineinfo, fs->pc, int);
+ f->sizelineinfo = fs->pc;
+ luaM_reallocvector(L, f->k, f->sizek, fs->nk, TObject);
+ f->sizek = fs->nk;
+ luaM_reallocvector(L, f->p, f->sizep, fs->np, Proto *);
+ f->sizep = fs->np;
+ luaM_reallocvector(L, f->locvars, f->sizelocvars, fs->nlocvars, LocVar);
+ f->sizelocvars = fs->nlocvars;
+ luaM_reallocvector(L, f->upvalues, f->sizeupvalues, f->nups, TString *);
+ f->sizeupvalues = f->nups;
+ lua_assert(luaG_checkcode(f));
+ lua_assert(fs->bl == NULL);
+ ls->fs = fs->prev;
+}
+
+
+Proto *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff) {
+ struct LexState lexstate;
+ struct FuncState funcstate;
+ lexstate.buff = buff;
+ lexstate.nestlevel = 0;
+ luaX_setinput(L, &lexstate, z, luaS_new(L, zname(z)));
+ open_func(&lexstate, &funcstate);
+ next(&lexstate); /* read first token */
+ chunk(&lexstate);
+ check_condition(&lexstate, (lexstate.t.token == TK_EOS), "<eof> expected");
+ close_func(&lexstate);
+ lua_assert(funcstate.prev == NULL);
+ lua_assert(funcstate.f->nups == 0);
+ lua_assert(lexstate.nestlevel == 0);
+ return funcstate.f;
+}
+
+
+
+/*============================================================*/
+/* GRAMMAR RULES */
+/*============================================================*/
+
+
+static void luaY_field (LexState *ls, expdesc *v) {
+ /* field -> ['.' | ':'] NAME */
+ FuncState *fs = ls->fs;
+ expdesc key;
+ luaK_exp2anyreg(fs, v);
+ next(ls); /* skip the dot or colon */
+ checkname(ls, &key);
+ luaK_indexed(fs, v, &key);
+}
+
+
+static void luaY_index (LexState *ls, expdesc *v) {
+ /* index -> '[' expr ']' */
+ next(ls); /* skip the '[' */
+ expr(ls, v);
+ luaK_exp2val(ls->fs, v);
+ check(ls, ']');
+}
+
+
+/*
+** {======================================================================
+** Rules for Constructors
+** =======================================================================
+*/
+
+
+struct ConsControl {
+ expdesc v; /* last list item read */
+ expdesc *t; /* table descriptor */
+ int nh; /* total number of `record' elements */
+ int na; /* total number of array elements */
+ int tostore; /* number of array elements pending to be stored */
+};
+
+
+static void recfield (LexState *ls, struct ConsControl *cc) {
+ /* recfield -> (NAME | `['exp1`]') = exp1 */
+ FuncState *fs = ls->fs;
+ int reg = ls->fs->freereg;
+ expdesc key, val;
+ if (ls->t.token == TK_NAME) {
+ luaX_checklimit(ls, cc->nh, MAX_INT, "items in a constructor");
+ cc->nh++;
+ checkname(ls, &key);
+ }
+ else /* ls->t.token == '[' */
+ luaY_index(ls, &key);
+ check(ls, '=');
+ luaK_exp2RK(fs, &key);
+ expr(ls, &val);
+ luaK_codeABC(fs, OP_SETTABLE, cc->t->info, luaK_exp2RK(fs, &key),
+ luaK_exp2RK(fs, &val));
+ fs->freereg = reg; /* free registers */
+}
+
+
+static void closelistfield (FuncState *fs, struct ConsControl *cc) {
+ if (cc->v.k == VVOID) return; /* there is no list item */
+ luaK_exp2nextreg(fs, &cc->v);
+ cc->v.k = VVOID;
+ if (cc->tostore == LFIELDS_PER_FLUSH) {
+ luaK_codeABx(fs, OP_SETLIST, cc->t->info, cc->na-1); /* flush */
+ cc->tostore = 0; /* no more items pending */
+ fs->freereg = cc->t->info + 1; /* free registers */
+ }
+}
+
+
+static void lastlistfield (FuncState *fs, struct ConsControl *cc) {
+ if (cc->tostore == 0) return;
+ if (cc->v.k == VCALL) {
+ luaK_setcallreturns(fs, &cc->v, LUA_MULTRET);
+ luaK_codeABx(fs, OP_SETLISTO, cc->t->info, cc->na-1);
+ }
+ else {
+ if (cc->v.k != VVOID)
+ luaK_exp2nextreg(fs, &cc->v);
+ luaK_codeABx(fs, OP_SETLIST, cc->t->info, cc->na-1);
+ }
+ fs->freereg = cc->t->info + 1; /* free registers */
+}
+
+
+static void listfield (LexState *ls, struct ConsControl *cc) {
+ expr(ls, &cc->v);
+ luaX_checklimit(ls, cc->na, MAXARG_Bx, "items in a constructor");
+ cc->na++;
+ cc->tostore++;
+}
+
+
+static void constructor (LexState *ls, expdesc *t) {
+ /* constructor -> ?? */
+ FuncState *fs = ls->fs;
+ int line = ls->linenumber;
+ int pc = luaK_codeABC(fs, OP_NEWTABLE, 0, 0, 0);
+ struct ConsControl cc;
+ cc.na = cc.nh = cc.tostore = 0;
+ cc.t = t;
+ init_exp(t, VRELOCABLE, pc);
+ init_exp(&cc.v, VVOID, 0); /* no value (yet) */
+ luaK_exp2nextreg(ls->fs, t); /* fix it at stack top (for gc) */
+ check(ls, '{');
+ do {
+ lua_assert(cc.v.k == VVOID || cc.tostore > 0);
+ testnext(ls, ';'); /* compatibility only */
+ if (ls->t.token == '}') break;
+ closelistfield(fs, &cc);
+ switch(ls->t.token) {
+ case TK_NAME: { /* may be listfields or recfields */
+ lookahead(ls);
+ if (ls->lookahead.token != '=') /* expression? */
+ listfield(ls, &cc);
+ else
+ recfield(ls, &cc);
+ break;
+ }
+ case '[': { /* constructor_item -> recfield */
+ recfield(ls, &cc);
+ break;
+ }
+ default: { /* constructor_part -> listfield */
+ listfield(ls, &cc);
+ break;
+ }
+ }
+ } while (testnext(ls, ',') || testnext(ls, ';'));
+ check_match(ls, '}', '{', line);
+ lastlistfield(fs, &cc);
+ SETARG_B(fs->f->code[pc], luaO_int2fb(cc.na)); /* set initial array size */
+ SETARG_C(fs->f->code[pc], luaO_log2(cc.nh)+1); /* set initial table size */
+}
+
+/* }====================================================================== */
+
+
+
+static void parlist (LexState *ls) {
+ /* parlist -> [ param { `,' param } ] */
+ int nparams = 0;
+ int dots = 0;
+ if (ls->t.token != ')') { /* is `parlist' not empty? */
+ do {
+ switch (ls->t.token) {
+ case TK_DOTS: dots = 1; next(ls); break;
+ case TK_NAME: new_localvar(ls, str_checkname(ls), nparams++); break;
+ default: luaX_syntaxerror(ls, "<name> or `...' expected");
+ }
+ } while (!dots && testnext(ls, ','));
+ }
+ code_params(ls, nparams, dots);
+}
+
+
+static void body (LexState *ls, expdesc *e, int needself, int line) {
+ /* body -> `(' parlist `)' chunk END */
+ FuncState new_fs;
+ open_func(ls, &new_fs);
+ new_fs.f->lineDefined = line;
+ check(ls, '(');
+ if (needself)
+ create_local(ls, "self");
+ parlist(ls);
+ check(ls, ')');
+ chunk(ls);
+ check_match(ls, TK_END, TK_FUNCTION, line);
+ close_func(ls);
+ pushclosure(ls, &new_fs, e);
+}
+
+
+static int explist1 (LexState *ls, expdesc *v) {
+ /* explist1 -> expr { `,' expr } */
+ int n = 1; /* at least one expression */
+ expr(ls, v);
+ while (testnext(ls, ',')) {
+ luaK_exp2nextreg(ls->fs, v);
+ expr(ls, v);
+ n++;
+ }
+ return n;
+}
+
+
+static void funcargs (LexState *ls, expdesc *f) {
+ FuncState *fs = ls->fs;
+ expdesc args;
+ int base, nparams;
+ int line = ls->linenumber;
+ switch (ls->t.token) {
+ case '(': { /* funcargs -> `(' [ explist1 ] `)' */
+ if (line != ls->lastline)
+ luaX_syntaxerror(ls,"ambiguous syntax (function call x new statement)");
+ next(ls);
+ if (ls->t.token == ')') /* arg list is empty? */
+ args.k = VVOID;
+ else {
+ explist1(ls, &args);
+ luaK_setcallreturns(fs, &args, LUA_MULTRET);
+ }
+ check_match(ls, ')', '(', line);
+ break;
+ }
+ case '{': { /* funcargs -> constructor */
+ constructor(ls, &args);
+ break;
+ }
+ case TK_STRING: { /* funcargs -> STRING */
+ codestring(ls, &args, ls->t.seminfo.ts);
+ next(ls); /* must use `seminfo' before `next' */
+ break;
+ }
+ default: {
+ luaX_syntaxerror(ls, "function arguments expected");
+ return;
+ }
+ }
+ lua_assert(f->k == VNONRELOC);
+ base = f->info; /* base register for call */
+ if (args.k == VCALL)
+ nparams = LUA_MULTRET; /* open call */
+ else {
+ if (args.k != VVOID)
+ luaK_exp2nextreg(fs, &args); /* close last argument */
+ nparams = fs->freereg - (base+1);
+ }
+ init_exp(f, VCALL, luaK_codeABC(fs, OP_CALL, base, nparams+1, 2));
+ luaK_fixline(fs, line);
+ fs->freereg = base+1; /* call remove function and arguments and leaves
+ (unless changed) one result */
+}
+
+
+
+
+/*
+** {======================================================================
+** Expression parsing
+** =======================================================================
+*/
+
+
+static void prefixexp (LexState *ls, expdesc *v) {
+ /* prefixexp -> NAME | '(' expr ')' */
+ switch (ls->t.token) {
+ case '(': {
+ int line = ls->linenumber;
+ next(ls);
+ expr(ls, v);
+ check_match(ls, ')', '(', line);
+ luaK_dischargevars(ls->fs, v);
+ return;
+ }
+ case TK_NAME: {
+ singlevar(ls, v, 1);
+ return;
+ }
+#ifdef LUA_COMPATUPSYNTAX
+ case '%': { /* for compatibility only */
+ TString *varname;
+ int line = ls->linenumber;
+ next(ls); /* skip `%' */
+ varname = singlevar(ls, v, 1);
+ if (v->k != VUPVAL)
+ luaX_errorline(ls, "global upvalues are obsolete",
+ getstr(varname), line);
+ return;
+ }
+#endif
+ default: {
+ luaX_syntaxerror(ls, "unexpected symbol");
+ return;
+ }
+ }
+}
+
+
+static void primaryexp (LexState *ls, expdesc *v) {
+ /* primaryexp ->
+ prefixexp { `.' NAME | `[' exp `]' | `:' NAME funcargs | funcargs } */
+ FuncState *fs = ls->fs;
+ prefixexp(ls, v);
+ for (;;) {
+ switch (ls->t.token) {
+ case '.': { /* field */
+ luaY_field(ls, v);
+ break;
+ }
+ case '[': { /* `[' exp1 `]' */
+ expdesc key;
+ luaK_exp2anyreg(fs, v);
+ luaY_index(ls, &key);
+ luaK_indexed(fs, v, &key);
+ break;
+ }
+ case ':': { /* `:' NAME funcargs */
+ expdesc key;
+ next(ls);
+ checkname(ls, &key);
+ luaK_self(fs, v, &key);
+ funcargs(ls, v);
+ break;
+ }
+ case '(': case TK_STRING: case '{': { /* funcargs */
+ luaK_exp2nextreg(fs, v);
+ funcargs(ls, v);
+ break;
+ }
+ default: return;
+ }
+ }
+}
+
+
+static void simpleexp (LexState *ls, expdesc *v) {
+ /* simpleexp -> NUMBER | STRING | NIL | constructor | FUNCTION body
+ | primaryexp */
+ switch (ls->t.token) {
+ case TK_NUMBER: {
+ init_exp(v, VK, luaK_numberK(ls->fs, ls->t.seminfo.r));
+ next(ls); /* must use `seminfo' before `next' */
+ break;
+ }
+ case TK_STRING: {
+ codestring(ls, v, ls->t.seminfo.ts);
+ next(ls); /* must use `seminfo' before `next' */
+ break;
+ }
+ case TK_NIL: {
+ init_exp(v, VNIL, 0);
+ next(ls);
+ break;
+ }
+ case TK_TRUE: {
+ init_exp(v, VTRUE, 0);
+ next(ls);
+ break;
+ }
+ case TK_FALSE: {
+ init_exp(v, VFALSE, 0);
+ next(ls);
+ break;
+ }
+ case '{': { /* constructor */
+ constructor(ls, v);
+ break;
+ }
+ case TK_FUNCTION: {
+ next(ls);
+ body(ls, v, 0, ls->linenumber);
+ break;
+ }
+ default: {
+ primaryexp(ls, v);
+ break;
+ }
+ }
+}
+
+
+static UnOpr getunopr (int op) {
+ switch (op) {
+ case TK_NOT: return OPR_NOT;
+ case '-': return OPR_MINUS;
+ default: return OPR_NOUNOPR;
+ }
+}
+
+
+static BinOpr getbinopr (int op) {
+ switch (op) {
+ case '+': return OPR_ADD;
+ case '-': return OPR_SUB;
+ case '*': return OPR_MULT;
+ case '/': return OPR_DIV;
+ case '^': return OPR_POW;
+ case TK_CONCAT: return OPR_CONCAT;
+ case TK_NE: return OPR_NE;
+ case TK_EQ: return OPR_EQ;
+ case '<': return OPR_LT;
+ case TK_LE: return OPR_LE;
+ case '>': return OPR_GT;
+ case TK_GE: return OPR_GE;
+ case TK_AND: return OPR_AND;
+ case TK_OR: return OPR_OR;
+ default: return OPR_NOBINOPR;
+ }
+}
+
+
+static const struct {
+ lu_byte left; /* left priority for each binary operator */
+ lu_byte right; /* right priority */
+} priority[] = { /* ORDER OPR */
+ {6, 6}, {6, 6}, {7, 7}, {7, 7}, /* arithmetic */
+ {10, 9}, {5, 4}, /* power and concat (right associative) */
+ {3, 3}, {3, 3}, /* equality */
+ {3, 3}, {3, 3}, {3, 3}, {3, 3}, /* order */
+ {2, 2}, {1, 1} /* logical (and/or) */
+};
+
+#define UNARY_PRIORITY 8 /* priority for unary operators */
+
+
+/*
+** subexpr -> (simplexep | unop subexpr) { binop subexpr }
+** where `binop' is any binary operator with a priority higher than `limit'
+*/
+static BinOpr subexpr (LexState *ls, expdesc *v, int limit) {
+ BinOpr op;
+ UnOpr uop;
+ enterlevel(ls);
+ uop = getunopr(ls->t.token);
+ if (uop != OPR_NOUNOPR) {
+ next(ls);
+ subexpr(ls, v, UNARY_PRIORITY);
+ luaK_prefix(ls->fs, uop, v);
+ }
+ else simpleexp(ls, v);
+ /* expand while operators have priorities higher than `limit' */
+ op = getbinopr(ls->t.token);
+ while (op != OPR_NOBINOPR && cast(int, priority[op].left) > limit) {
+ expdesc v2;
+ BinOpr nextop;
+ next(ls);
+ luaK_infix(ls->fs, op, v);
+ /* read sub-expression with higher priority */
+ nextop = subexpr(ls, &v2, cast(int, priority[op].right));
+ luaK_posfix(ls->fs, op, v, &v2);
+ op = nextop;
+ }
+ leavelevel(ls);
+ return op; /* return first untreated operator */
+}
+
+
+static void expr (LexState *ls, expdesc *v) {
+ subexpr(ls, v, -1);
+}
+
+/* }==================================================================== */
+
+
+
+/*
+** {======================================================================
+** Rules for Statements
+** =======================================================================
+*/
+
+
+static int block_follow (int token) {
+ switch (token) {
+ case TK_ELSE: case TK_ELSEIF: case TK_END:
+ case TK_UNTIL: case TK_EOS:
+ return 1;
+ default: return 0;
+ }
+}
+
+
+static void block (LexState *ls) {
+ /* block -> chunk */
+ FuncState *fs = ls->fs;
+ BlockCnt bl;
+ enterblock(fs, &bl, 0);
+ chunk(ls);
+ lua_assert(bl.breaklist == NO_JUMP);
+ leaveblock(fs);
+}
+
+
+/*
+** structure to chain all variables in the left-hand side of an
+** assignment
+*/
+struct LHS_assign {
+ struct LHS_assign *prev;
+ expdesc v; /* variable (global, local, upvalue, or indexed) */
+};
+
+
+/*
+** check whether, in an assignment to a local variable, the local variable
+** is needed in a previous assignment (to a table). If so, save original
+** local value in a safe place and use this safe copy in the previous
+** assignment.
+*/
+static void check_conflict (LexState *ls, struct LHS_assign *lh, expdesc *v) {
+ FuncState *fs = ls->fs;
+ int extra = fs->freereg; /* eventual position to save local variable */
+ int conflict = 0;
+ for (; lh; lh = lh->prev) {
+ if (lh->v.k == VINDEXED) {
+ if (lh->v.info == v->info) { /* conflict? */
+ conflict = 1;
+ lh->v.info = extra; /* previous assignment will use safe copy */
+ }
+ if (lh->v.aux == v->info) { /* conflict? */
+ conflict = 1;
+ lh->v.aux = extra; /* previous assignment will use safe copy */
+ }
+ }
+ }
+ if (conflict) {
+ luaK_codeABC(fs, OP_MOVE, fs->freereg, v->info, 0); /* make copy */
+ luaK_reserveregs(fs, 1);
+ }
+}
+
+
+static void assignment (LexState *ls, struct LHS_assign *lh, int nvars) {
+ expdesc e;
+ check_condition(ls, VLOCAL <= lh->v.k && lh->v.k <= VINDEXED,
+ "syntax error");
+ if (testnext(ls, ',')) { /* assignment -> `,' primaryexp assignment */
+ struct LHS_assign nv;
+ nv.prev = lh;
+ primaryexp(ls, &nv.v);
+ if (nv.v.k == VLOCAL)
+ check_conflict(ls, lh, &nv.v);
+ assignment(ls, &nv, nvars+1);
+ }
+ else { /* assignment -> `=' explist1 */
+ int nexps;
+ check(ls, '=');
+ nexps = explist1(ls, &e);
+ if (nexps != nvars) {
+ adjust_assign(ls, nvars, nexps, &e);
+ if (nexps > nvars)
+ ls->fs->freereg -= nexps - nvars; /* remove extra values */
+ }
+ else {
+ luaK_setcallreturns(ls->fs, &e, 1); /* close last expression */
+ luaK_storevar(ls->fs, &lh->v, &e);
+ return; /* avoid default */
+ }
+ }
+ init_exp(&e, VNONRELOC, ls->fs->freereg-1); /* default assignment */
+ luaK_storevar(ls->fs, &lh->v, &e);
+}
+
+
+static void cond (LexState *ls, expdesc *v) {
+ /* cond -> exp */
+ expr(ls, v); /* read condition */
+ if (v->k == VNIL) v->k = VFALSE; /* `falses' are all equal here */
+ luaK_goiftrue(ls->fs, v);
+ luaK_patchtohere(ls->fs, v->t);
+}
+
+
+/*
+** The while statement optimizes its code by coding the condition
+** after its body (and thus avoiding one jump in the loop).
+*/
+
+/*
+** maximum size of expressions for optimizing `while' code
+*/
+#ifndef MAXEXPWHILE
+#define MAXEXPWHILE 100
+#endif
+
+/*
+** the call `luaK_goiffalse' may grow the size of an expression by
+** at most this:
+*/
+#define EXTRAEXP 5
+
+static void whilestat (LexState *ls, int line) {
+ /* whilestat -> WHILE cond DO block END */
+ Instruction codeexp[MAXEXPWHILE + EXTRAEXP];
+ int lineexp;
+ int i;
+ int sizeexp;
+ FuncState *fs = ls->fs;
+ int whileinit, blockinit, expinit;
+ expdesc v;
+ BlockCnt bl;
+ next(ls); /* skip WHILE */
+ whileinit = luaK_jump(fs); /* jump to condition (which will be moved) */
+ expinit = luaK_getlabel(fs);
+ expr(ls, &v); /* parse condition */
+ if (v.k == VK) v.k = VTRUE; /* `trues' are all equal here */
+ lineexp = ls->linenumber;
+ luaK_goiffalse(fs, &v);
+ luaK_concat(fs, &v.f, fs->jpc);
+ fs->jpc = NO_JUMP;
+ sizeexp = fs->pc - expinit; /* size of expression code */
+ if (sizeexp > MAXEXPWHILE)
+ luaX_syntaxerror(ls, "`while' condition too complex");
+ for (i = 0; i < sizeexp; i++) /* save `exp' code */
+ codeexp[i] = fs->f->code[expinit + i];
+ fs->pc = expinit; /* remove `exp' code */
+ enterblock(fs, &bl, 1);
+ check(ls, TK_DO);
+ blockinit = luaK_getlabel(fs);
+ block(ls);
+ luaK_patchtohere(fs, whileinit); /* initial jump jumps to here */
+ /* move `exp' back to code */
+ if (v.t != NO_JUMP) v.t += fs->pc - expinit;
+ if (v.f != NO_JUMP) v.f += fs->pc - expinit;
+ for (i=0; i<sizeexp; i++)
+ luaK_code(fs, codeexp[i], lineexp);
+ check_match(ls, TK_END, TK_WHILE, line);
+ leaveblock(fs);
+ luaK_patchlist(fs, v.t, blockinit); /* true conditions go back to loop */
+ luaK_patchtohere(fs, v.f); /* false conditions finish the loop */
+}
+
+
+static void repeatstat (LexState *ls, int line) {
+ /* repeatstat -> REPEAT block UNTIL cond */
+ FuncState *fs = ls->fs;
+ int repeat_init = luaK_getlabel(fs);
+ expdesc v;
+ BlockCnt bl;
+ enterblock(fs, &bl, 1);
+ next(ls);
+ block(ls);
+ check_match(ls, TK_UNTIL, TK_REPEAT, line);
+ cond(ls, &v);
+ luaK_patchlist(fs, v.f, repeat_init);
+ leaveblock(fs);
+}
+
+
+static int exp1 (LexState *ls) {
+ expdesc e;
+ int k;
+ expr(ls, &e);
+ k = e.k;
+ luaK_exp2nextreg(ls->fs, &e);
+ return k;
+}
+
+
+static void forbody (LexState *ls, int base, int line, int nvars, int isnum) {
+ BlockCnt bl;
+ FuncState *fs = ls->fs;
+ int prep, endfor;
+ adjustlocalvars(ls, nvars); /* scope for all variables */
+ check(ls, TK_DO);
+ enterblock(fs, &bl, 1); /* loop block */
+ prep = luaK_getlabel(fs);
+ block(ls);
+ luaK_patchtohere(fs, prep-1);
+ endfor = (isnum) ? luaK_codeAsBx(fs, OP_FORLOOP, base, NO_JUMP) :
+ luaK_codeABC(fs, OP_TFORLOOP, base, 0, nvars - 3);
+ luaK_fixline(fs, line); /* pretend that `OP_FOR' starts the loop */
+ luaK_patchlist(fs, (isnum) ? endfor : luaK_jump(fs), prep);
+ leaveblock(fs);
+}
+
+
+static void fornum (LexState *ls, TString *varname, int line) {
+ /* fornum -> NAME = exp1,exp1[,exp1] DO body */
+ FuncState *fs = ls->fs;
+ int base = fs->freereg;
+ new_localvar(ls, varname, 0);
+ new_localvarstr(ls, "(for limit)", 1);
+ new_localvarstr(ls, "(for step)", 2);
+ check(ls, '=');
+ exp1(ls); /* initial value */
+ check(ls, ',');
+ exp1(ls); /* limit */
+ if (testnext(ls, ','))
+ exp1(ls); /* optional step */
+ else { /* default step = 1 */
+ luaK_codeABx(fs, OP_LOADK, fs->freereg, luaK_numberK(fs, 1));
+ luaK_reserveregs(fs, 1);
+ }
+ luaK_codeABC(fs, OP_SUB, fs->freereg - 3, fs->freereg - 3, fs->freereg - 1);
+ luaK_jump(fs);
+ forbody(ls, base, line, 3, 1);
+}
+
+
+static void forlist (LexState *ls, TString *indexname) {
+ /* forlist -> NAME {,NAME} IN explist1 DO body */
+ FuncState *fs = ls->fs;
+ expdesc e;
+ int nvars = 0;
+ int line;
+ int base = fs->freereg;
+ new_localvarstr(ls, "(for generator)", nvars++);
+ new_localvarstr(ls, "(for state)", nvars++);
+ new_localvar(ls, indexname, nvars++);
+ while (testnext(ls, ','))
+ new_localvar(ls, str_checkname(ls), nvars++);
+ check(ls, TK_IN);
+ line = ls->linenumber;
+ adjust_assign(ls, nvars, explist1(ls, &e), &e);
+ luaK_checkstack(fs, 3); /* extra space to call generator */
+ luaK_codeAsBx(fs, OP_TFORPREP, base, NO_JUMP);
+ forbody(ls, base, line, nvars, 0);
+}
+
+
+static void forstat (LexState *ls, int line) {
+ /* forstat -> fornum | forlist */
+ FuncState *fs = ls->fs;
+ TString *varname;
+ BlockCnt bl;
+ enterblock(fs, &bl, 0); /* block to control variable scope */
+ next(ls); /* skip `for' */
+ varname = str_checkname(ls); /* first variable name */
+ switch (ls->t.token) {
+ case '=': fornum(ls, varname, line); break;
+ case ',': case TK_IN: forlist(ls, varname); break;
+ default: luaX_syntaxerror(ls, "`=' or `in' expected");
+ }
+ check_match(ls, TK_END, TK_FOR, line);
+ leaveblock(fs);
+}
+
+
+static void test_then_block (LexState *ls, expdesc *v) {
+ /* test_then_block -> [IF | ELSEIF] cond THEN block */
+ next(ls); /* skip IF or ELSEIF */
+ cond(ls, v);
+ check(ls, TK_THEN);
+ block(ls); /* `then' part */
+}
+
+
+static void ifstat (LexState *ls, int line) {
+ /* ifstat -> IF cond THEN block {ELSEIF cond THEN block} [ELSE block] END */
+ FuncState *fs = ls->fs;
+ expdesc v;
+ int escapelist = NO_JUMP;
+ test_then_block(ls, &v); /* IF cond THEN block */
+ while (ls->t.token == TK_ELSEIF) {
+ luaK_concat(fs, &escapelist, luaK_jump(fs));
+ luaK_patchtohere(fs, v.f);
+ test_then_block(ls, &v); /* ELSEIF cond THEN block */
+ }
+ if (ls->t.token == TK_ELSE) {
+ luaK_concat(fs, &escapelist, luaK_jump(fs));
+ luaK_patchtohere(fs, v.f);
+ next(ls); /* skip ELSE (after patch, for correct line info) */
+ block(ls); /* `else' part */
+ }
+ else
+ luaK_concat(fs, &escapelist, v.f);
+ luaK_patchtohere(fs, escapelist);
+ check_match(ls, TK_END, TK_IF, line);
+}
+
+
+static void localfunc (LexState *ls) {
+ expdesc v, b;
+ new_localvar(ls, str_checkname(ls), 0);
+ init_exp(&v, VLOCAL, ls->fs->freereg++);
+ adjustlocalvars(ls, 1);
+ body(ls, &b, 0, ls->linenumber);
+ luaK_storevar(ls->fs, &v, &b);
+}
+
+
+static void localstat (LexState *ls) {
+ /* stat -> LOCAL NAME {`,' NAME} [`=' explist1] */
+ int nvars = 0;
+ int nexps;
+ expdesc e;
+ do {
+ new_localvar(ls, str_checkname(ls), nvars++);
+ } while (testnext(ls, ','));
+ if (testnext(ls, '='))
+ nexps = explist1(ls, &e);
+ else {
+ e.k = VVOID;
+ nexps = 0;
+ }
+ adjust_assign(ls, nvars, nexps, &e);
+ adjustlocalvars(ls, nvars);
+}
+
+
+static int funcname (LexState *ls, expdesc *v) {
+ /* funcname -> NAME {field} [`:' NAME] */
+ int needself = 0;
+ singlevar(ls, v, 1);
+ while (ls->t.token == '.')
+ luaY_field(ls, v);
+ if (ls->t.token == ':') {
+ needself = 1;
+ luaY_field(ls, v);
+ }
+ return needself;
+}
+
+
+static void funcstat (LexState *ls, int line) {
+ /* funcstat -> FUNCTION funcname body */
+ int needself;
+ expdesc v, b;
+ next(ls); /* skip FUNCTION */
+ needself = funcname(ls, &v);
+ body(ls, &b, needself, line);
+ luaK_storevar(ls->fs, &v, &b);
+ luaK_fixline(ls->fs, line); /* definition `happens' in the first line */
+}
+
+
+static void exprstat (LexState *ls) {
+ /* stat -> func | assignment */
+ FuncState *fs = ls->fs;
+ struct LHS_assign v;
+ primaryexp(ls, &v.v);
+ if (v.v.k == VCALL) { /* stat -> func */
+ luaK_setcallreturns(fs, &v.v, 0); /* call statement uses no results */
+ }
+ else { /* stat -> assignment */
+ v.prev = NULL;
+ assignment(ls, &v, 1);
+ }
+}
+
+
+static void retstat (LexState *ls) {
+ /* stat -> RETURN explist */
+ FuncState *fs = ls->fs;
+ expdesc e;
+ int first, nret; /* registers with returned values */
+ next(ls); /* skip RETURN */
+ if (block_follow(ls->t.token) || ls->t.token == ';')
+ first = nret = 0; /* return no values */
+ else {
+ nret = explist1(ls, &e); /* optional return values */
+ if (e.k == VCALL) {
+ luaK_setcallreturns(fs, &e, LUA_MULTRET);
+ if (nret == 1) { /* tail call? */
+ SET_OPCODE(getcode(fs,&e), OP_TAILCALL);
+ lua_assert(GETARG_A(getcode(fs,&e)) == fs->nactvar);
+ }
+ first = fs->nactvar;
+ nret = LUA_MULTRET; /* return all values */
+ }
+ else {
+ if (nret == 1) /* only one single value? */
+ first = luaK_exp2anyreg(fs, &e);
+ else {
+ luaK_exp2nextreg(fs, &e); /* values must go to the `stack' */
+ first = fs->nactvar; /* return all `active' values */
+ lua_assert(nret == fs->freereg - first);
+ }
+ }
+ }
+ luaK_codeABC(fs, OP_RETURN, first, nret+1, 0);
+}
+
+
+static void breakstat (LexState *ls) {
+ /* stat -> BREAK [NAME] */
+ FuncState *fs = ls->fs;
+ BlockCnt *bl = fs->bl;
+ int upval = 0;
+ next(ls); /* skip BREAK */
+ while (bl && !bl->isbreakable) {
+ upval |= bl->upval;
+ bl = bl->previous;
+ }
+ if (!bl)
+ luaX_syntaxerror(ls, "no loop to break");
+ if (upval)
+ luaK_codeABC(fs, OP_CLOSE, bl->nactvar, 0, 0);
+ luaK_concat(fs, &bl->breaklist, luaK_jump(fs));
+}
+
+
+static int statement (LexState *ls) {
+ int line = ls->linenumber; /* may be needed for error messages */
+ switch (ls->t.token) {
+ case TK_IF: { /* stat -> ifstat */
+ ifstat(ls, line);
+ return 0;
+ }
+ case TK_WHILE: { /* stat -> whilestat */
+ whilestat(ls, line);
+ return 0;
+ }
+ case TK_DO: { /* stat -> DO block END */
+ next(ls); /* skip DO */
+ block(ls);
+ check_match(ls, TK_END, TK_DO, line);
+ return 0;
+ }
+ case TK_FOR: { /* stat -> forstat */
+ forstat(ls, line);
+ return 0;
+ }
+ case TK_REPEAT: { /* stat -> repeatstat */
+ repeatstat(ls, line);
+ return 0;
+ }
+ case TK_FUNCTION: {
+ funcstat(ls, line); /* stat -> funcstat */
+ return 0;
+ }
+ case TK_LOCAL: { /* stat -> localstat */
+ next(ls); /* skip LOCAL */
+ if (testnext(ls, TK_FUNCTION)) /* local function? */
+ localfunc(ls);
+ else
+ localstat(ls);
+ return 0;
+ }
+ case TK_RETURN: { /* stat -> retstat */
+ retstat(ls);
+ return 1; /* must be last statement */
+ }
+ case TK_BREAK: { /* stat -> breakstat */
+ breakstat(ls);
+ return 1; /* must be last statement */
+ }
+ default: {
+ exprstat(ls);
+ return 0; /* to avoid warnings */
+ }
+ }
+}
+
+
+static void chunk (LexState *ls) {
+ /* chunk -> { stat [`;'] } */
+ int islast = 0;
+ enterlevel(ls);
+ while (!islast && !block_follow(ls->t.token)) {
+ islast = statement(ls);
+ testnext(ls, ';');
+ lua_assert(ls->fs->freereg >= ls->fs->nactvar);
+ ls->fs->freereg = ls->fs->nactvar; /* free registers */
+ }
+ leavelevel(ls);
+}
+
+/* }====================================================================== */
diff --git a/lib/lua/src/lstate.c b/lib/lua/src/lstate.c index f6dd14f..53eb6aa 100644 --- a/lib/lua/src/lstate.c +++ b/lib/lua/src/lstate.c @@ -1,220 +1,220 @@ -/* -** $Id: lstate.c,v 1.2 2003-12-11 16:53:30 pixel Exp $ -** Global State -** See Copyright Notice in lua.h -*/ - - -#include <stdlib.h> - -#define lstate_c - -#include "lua.h" - -#include "ldebug.h" -#include "ldo.h" -#include "lfunc.h" -#include "lgc.h" -#include "llex.h" -#include "lmem.h" -#include "lstate.h" -#include "lstring.h" -#include "ltable.h" -#include "ltm.h" - - -/* -** macro to allow the inclusion of user information in Lua state -*/ -#ifndef LUA_USERSTATE -#define EXTRASPACE 0 -#else -union UEXTRASPACE {L_Umaxalign a; LUA_USERSTATE b;}; -#define EXTRASPACE (sizeof(union UEXTRASPACE)) -#endif - - - -/* -** you can change this function through the official API: -** call `lua_setpanicf' -*/ -static int default_panic (lua_State *L) { - UNUSED(L); - return 0; -} - - -static lua_State *mallocstate (lua_State *L) { - lu_byte *block = (lu_byte *)luaM_malloc(L, sizeof(lua_State) + EXTRASPACE); - if (block == NULL) return NULL; - else { - block += EXTRASPACE; - return cast(lua_State *, block); - } -} - - -static void freestate (lua_State *L, lua_State *L1) { - luaM_free(L, cast(lu_byte *, L1) - EXTRASPACE, - sizeof(lua_State) + EXTRASPACE); -} - - -static void stack_init (lua_State *L1, lua_State *L) { - L1->stack = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, TObject); - L1->stacksize = BASIC_STACK_SIZE + EXTRA_STACK; - L1->top = L1->stack; - L1->stack_last = L1->stack+(L1->stacksize - EXTRA_STACK)-1; - L1->base_ci = luaM_newvector(L, BASIC_CI_SIZE, CallInfo); - L1->ci = L1->base_ci; - L1->ci->state = CI_C; /* not a Lua function */ - setnilvalue(L1->top++); /* `function' entry for this `ci' */ - L1->base = L1->ci->base = L1->top; - L1->ci->top = L1->top + LUA_MINSTACK; - L1->size_ci = BASIC_CI_SIZE; - L1->end_ci = L1->base_ci + L1->size_ci; -} - - -static void freestack (lua_State *L, lua_State *L1) { - luaM_freearray(L, L1->base_ci, L1->size_ci, CallInfo); - luaM_freearray(L, L1->stack, L1->stacksize, TObject); -} - - -/* -** open parts that may cause memory-allocation errors -*/ -static void f_luaopen (lua_State *L, void *ud) { - /* create a new global state */ - global_State *g = luaM_new(NULL, global_State); - UNUSED(ud); - if (g == NULL) luaD_throw(L, LUA_ERRMEM); - L->l_G = g; - g->mainthread = L; - g->GCthreshold = 0; /* mark it as unfinished state */ - g->strt.size = 0; - g->strt.nuse = 0; - g->strt.hash = NULL; - setnilvalue(defaultmeta(L)); - setnilvalue(registry(L)); - luaZ_initbuffer(L, &g->buff); - g->panic = default_panic; - g->rootgc = NULL; - g->rootudata = NULL; - g->tmudata = NULL; - setnilvalue(gkey(g->dummynode)); - setnilvalue(gval(g->dummynode)); - g->dummynode->next = NULL; - g->nblocks = sizeof(lua_State) + sizeof(global_State); - stack_init(L, L); /* init stack */ - /* create default meta table with a dummy table, and then close the loop */ - defaultmeta(L)->tt = LUA_TTABLE; - sethvalue(defaultmeta(L), luaH_new(L, 0, 0)); - hvalue(defaultmeta(L))->metatable = hvalue(defaultmeta(L)); - sethvalue(gt(L), luaH_new(L, 0, 4)); /* table of globals */ - sethvalue(registry(L), luaH_new(L, 4, 4)); /* registry */ - luaS_resize(L, MINSTRTABSIZE); /* initial size of string table */ - luaT_init(L); - luaX_init(L); - luaS_fix(luaS_newliteral(L, MEMERRMSG)); - g->GCthreshold = 4*G(L)->nblocks; -} - - -static void preinit_state (lua_State *L) { - L->stack = NULL; - L->stacksize = 0; - L->errorJmp = NULL; - L->hook = NULL; - L->hookmask = L->hookinit = 0; - L->basehookcount = 0; - L->allowhook = 1; - resethookcount(L); - L->openupval = NULL; - L->size_ci = 0; - L->nCcalls = 0; - L->base_ci = L->ci = NULL; - L->errfunc = 0; - setnilvalue(gt(L)); -} - - -static void close_state (lua_State *L) { - luaF_close(L, L->stack); /* close all upvalues for this thread */ - if (G(L)) { /* close global state */ - luaC_sweep(L, 1); /* collect all elements */ - lua_assert(G(L)->rootgc == NULL); - lua_assert(G(L)->rootudata == NULL); - luaS_freeall(L); - luaZ_freebuffer(L, &G(L)->buff); - } - freestack(L, L); - if (G(L)) { - lua_assert(G(L)->nblocks == sizeof(lua_State) + sizeof(global_State)); - luaM_freelem(NULL, G(L)); - } - freestate(NULL, L); -} - - -lua_State *luaE_newthread (lua_State *L) { - lua_State *L1 = mallocstate(L); - luaC_link(L, valtogco(L1), LUA_TTHREAD); - preinit_state(L1); - L1->l_G = L->l_G; - stack_init(L1, L); /* init stack */ - setobj2n(gt(L1), gt(L)); /* share table of globals */ - return L1; -} - - -void luaE_freethread (lua_State *L, lua_State *L1) { - luaF_close(L1, L1->stack); /* close all upvalues for this thread */ - lua_assert(L1->openupval == NULL); - freestack(L, L1); - freestate(L, L1); -} - - -LUA_API lua_State *lua_open (void) { - lua_State *L = mallocstate(NULL); - if (L) { /* allocation OK? */ - L->tt = LUA_TTHREAD; - L->marked = 0; - L->next = L->gclist = NULL; - preinit_state(L); - L->l_G = NULL; - if (luaD_rawrunprotected(L, f_luaopen, NULL) != 0) { - /* memory allocation error: free partial state */ - close_state(L); - L = NULL; - } - } - lua_userstateopen(L); - return L; -} - - -static void callallgcTM (lua_State *L, void *ud) { - UNUSED(ud); - luaC_callGCTM(L); /* call GC metamethods for all udata */ -} - - -LUA_API void lua_close (lua_State *L) { - lua_lock(L); - L = G(L)->mainthread; /* only the main thread can be closed */ - luaF_close(L, L->stack); /* close all upvalues for this thread */ - luaC_separateudata(L); /* separate udata that have GC metamethods */ - L->errfunc = 0; /* no error function during GC metamethods */ - do { /* repeat until no more errors */ - L->ci = L->base_ci; - L->base = L->top = L->ci->base; - L->nCcalls = 0; - } while (luaD_rawrunprotected(L, callallgcTM, NULL) != 0); - lua_assert(G(L)->tmudata == NULL); - close_state(L); -} - +/*
+** $Id: lstate.c,v 1.3 2004-11-27 21:35:20 pixel Exp $
+** Global State
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdlib.h>
+
+#define lstate_c
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lgc.h"
+#include "llex.h"
+#include "lmem.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+
+
+/*
+** macro to allow the inclusion of user information in Lua state
+*/
+#ifndef LUA_USERSTATE
+#define EXTRASPACE 0
+#else
+union UEXTRASPACE {L_Umaxalign a; LUA_USERSTATE b;};
+#define EXTRASPACE (sizeof(union UEXTRASPACE))
+#endif
+
+
+
+/*
+** you can change this function through the official API:
+** call `lua_setpanicf'
+*/
+static int default_panic (lua_State *L) {
+ UNUSED(L);
+ return 0;
+}
+
+
+static lua_State *mallocstate (lua_State *L) {
+ lu_byte *block = (lu_byte *)luaM_malloc(L, sizeof(lua_State) + EXTRASPACE);
+ if (block == NULL) return NULL;
+ else {
+ block += EXTRASPACE;
+ return cast(lua_State *, block);
+ }
+}
+
+
+static void freestate (lua_State *L, lua_State *L1) {
+ luaM_free(L, cast(lu_byte *, L1) - EXTRASPACE,
+ sizeof(lua_State) + EXTRASPACE);
+}
+
+
+static void stack_init (lua_State *L1, lua_State *L) {
+ L1->stack = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, TObject);
+ L1->stacksize = BASIC_STACK_SIZE + EXTRA_STACK;
+ L1->top = L1->stack;
+ L1->stack_last = L1->stack+(L1->stacksize - EXTRA_STACK)-1;
+ L1->base_ci = luaM_newvector(L, BASIC_CI_SIZE, CallInfo);
+ L1->ci = L1->base_ci;
+ L1->ci->state = CI_C; /* not a Lua function */
+ setnilvalue(L1->top++); /* `function' entry for this `ci' */
+ L1->base = L1->ci->base = L1->top;
+ L1->ci->top = L1->top + LUA_MINSTACK;
+ L1->size_ci = BASIC_CI_SIZE;
+ L1->end_ci = L1->base_ci + L1->size_ci;
+}
+
+
+static void freestack (lua_State *L, lua_State *L1) {
+ luaM_freearray(L, L1->base_ci, L1->size_ci, CallInfo);
+ luaM_freearray(L, L1->stack, L1->stacksize, TObject);
+}
+
+
+/*
+** open parts that may cause memory-allocation errors
+*/
+static void f_luaopen (lua_State *L, void *ud) {
+ /* create a new global state */
+ global_State *g = luaM_new(NULL, global_State);
+ UNUSED(ud);
+ if (g == NULL) luaD_throw(L, LUA_ERRMEM);
+ L->l_G = g;
+ g->mainthread = L;
+ g->GCthreshold = 0; /* mark it as unfinished state */
+ g->strt.size = 0;
+ g->strt.nuse = 0;
+ g->strt.hash = NULL;
+ setnilvalue(defaultmeta(L));
+ setnilvalue(registry(L));
+ luaZ_initbuffer(L, &g->buff);
+ g->panic = default_panic;
+ g->rootgc = NULL;
+ g->rootudata = NULL;
+ g->tmudata = NULL;
+ setnilvalue(gkey(g->dummynode));
+ setnilvalue(gval(g->dummynode));
+ g->dummynode->next = NULL;
+ g->nblocks = sizeof(lua_State) + sizeof(global_State);
+ stack_init(L, L); /* init stack */
+ /* create default meta table with a dummy table, and then close the loop */
+ defaultmeta(L)->tt = LUA_TTABLE;
+ sethvalue(defaultmeta(L), luaH_new(L, 0, 0));
+ hvalue(defaultmeta(L))->metatable = hvalue(defaultmeta(L));
+ sethvalue(gt(L), luaH_new(L, 0, 4)); /* table of globals */
+ sethvalue(registry(L), luaH_new(L, 4, 4)); /* registry */
+ luaS_resize(L, MINSTRTABSIZE); /* initial size of string table */
+ luaT_init(L);
+ luaX_init(L);
+ luaS_fix(luaS_newliteral(L, MEMERRMSG));
+ g->GCthreshold = 4*G(L)->nblocks;
+}
+
+
+static void preinit_state (lua_State *L) {
+ L->stack = NULL;
+ L->stacksize = 0;
+ L->errorJmp = NULL;
+ L->hook = NULL;
+ L->hookmask = L->hookinit = 0;
+ L->basehookcount = 0;
+ L->allowhook = 1;
+ resethookcount(L);
+ L->openupval = NULL;
+ L->size_ci = 0;
+ L->nCcalls = 0;
+ L->base_ci = L->ci = NULL;
+ L->errfunc = 0;
+ setnilvalue(gt(L));
+}
+
+
+static void close_state (lua_State *L) {
+ luaF_close(L, L->stack); /* close all upvalues for this thread */
+ if (G(L)) { /* close global state */
+ luaC_sweep(L, 1); /* collect all elements */
+ lua_assert(G(L)->rootgc == NULL);
+ lua_assert(G(L)->rootudata == NULL);
+ luaS_freeall(L);
+ luaZ_freebuffer(L, &G(L)->buff);
+ }
+ freestack(L, L);
+ if (G(L)) {
+ lua_assert(G(L)->nblocks == sizeof(lua_State) + sizeof(global_State));
+ luaM_freelem(NULL, G(L));
+ }
+ freestate(NULL, L);
+}
+
+
+lua_State *luaE_newthread (lua_State *L) {
+ lua_State *L1 = mallocstate(L);
+ luaC_link(L, valtogco(L1), LUA_TTHREAD);
+ preinit_state(L1);
+ L1->l_G = L->l_G;
+ stack_init(L1, L); /* init stack */
+ setobj2n(gt(L1), gt(L)); /* share table of globals */
+ return L1;
+}
+
+
+void luaE_freethread (lua_State *L, lua_State *L1) {
+ luaF_close(L1, L1->stack); /* close all upvalues for this thread */
+ lua_assert(L1->openupval == NULL);
+ freestack(L, L1);
+ freestate(L, L1);
+}
+
+
+LUA_API lua_State *lua_open (void) {
+ lua_State *L = mallocstate(NULL);
+ if (L) { /* allocation OK? */
+ L->tt = LUA_TTHREAD;
+ L->marked = 0;
+ L->next = L->gclist = NULL;
+ preinit_state(L);
+ L->l_G = NULL;
+ if (luaD_rawrunprotected(L, f_luaopen, NULL) != 0) {
+ /* memory allocation error: free partial state */
+ close_state(L);
+ L = NULL;
+ }
+ }
+ lua_userstateopen(L);
+ return L;
+}
+
+
+static void callallgcTM (lua_State *L, void *ud) {
+ UNUSED(ud);
+ luaC_callGCTM(L); /* call GC metamethods for all udata */
+}
+
+
+LUA_API void lua_close (lua_State *L) {
+ lua_lock(L);
+ L = G(L)->mainthread; /* only the main thread can be closed */
+ luaF_close(L, L->stack); /* close all upvalues for this thread */
+ luaC_separateudata(L); /* separate udata that have GC metamethods */
+ L->errfunc = 0; /* no error function during GC metamethods */
+ do { /* repeat until no more errors */
+ L->ci = L->base_ci;
+ L->base = L->top = L->ci->base;
+ L->nCcalls = 0;
+ } while (luaD_rawrunprotected(L, callallgcTM, NULL) != 0);
+ lua_assert(G(L)->tmudata == NULL);
+ close_state(L);
+}
+
diff --git a/lib/lua/src/lstring.c b/lib/lua/src/lstring.c index 2d6f5e5..863f510 100644 --- a/lib/lua/src/lstring.c +++ b/lib/lua/src/lstring.c @@ -1,102 +1,102 @@ -/* -** $Id: lstring.c,v 1.2 2003-12-11 16:53:30 pixel Exp $ -** String table (keeps all strings handled by Lua) -** See Copyright Notice in lua.h -*/ - - -#include <string.h> - -#define lstring_c - -#include "lua.h" - -#include "lmem.h" -#include "lobject.h" -#include "lstate.h" -#include "lstring.h" - - - -void luaS_freeall (lua_State *L) { - lua_assert(G(L)->strt.nuse==0); - luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size, TString *); -} - - -void luaS_resize (lua_State *L, int newsize) { - GCObject **newhash = luaM_newvector(L, newsize, GCObject *); - stringtable *tb = &G(L)->strt; - int i; - for (i=0; i<newsize; i++) newhash[i] = NULL; - /* rehash */ - for (i=0; i<tb->size; i++) { - GCObject *p = tb->hash[i]; - while (p) { /* for each node in the list */ - GCObject *next = p->gch.next; /* save next */ - lu_hash h = gcotots(p)->tsv.hash; - int h1 = lmod(h, newsize); /* new position */ - lua_assert(cast(int, h%newsize) == lmod(h, newsize)); - p->gch.next = newhash[h1]; /* chain it */ - newhash[h1] = p; - p = next; - } - } - luaM_freearray(L, tb->hash, tb->size, TString *); - tb->size = newsize; - tb->hash = newhash; -} - - -static TString *newlstr (lua_State *L, const char *str, size_t l, lu_hash h) { - TString *ts = cast(TString *, luaM_malloc(L, sizestring(l))); - stringtable *tb; - ts->tsv.len = l; - ts->tsv.hash = h; - ts->tsv.marked = 0; - ts->tsv.tt = LUA_TSTRING; - ts->tsv.reserved = 0; - memcpy(ts+1, str, l*sizeof(char)); - ((char *)(ts+1))[l] = '\0'; /* ending 0 */ - tb = &G(L)->strt; - h = lmod(h, tb->size); - ts->tsv.next = tb->hash[h]; /* chain new entry */ - tb->hash[h] = valtogco(ts); - tb->nuse++; - if (tb->nuse > cast(ls_nstr, tb->size) && tb->size <= MAX_INT/2) - luaS_resize(L, tb->size*2); /* too crowded */ - return ts; -} - - -TString *luaS_newlstr (lua_State *L, const char *str, size_t l) { - GCObject *o; - lu_hash h = (lu_hash)l; /* seed */ - size_t step = (l>>5)+1; /* if string is too long, don't hash all its chars */ - size_t l1; - for (l1=l; l1>=step; l1-=step) /* compute hash */ - h = h ^ ((h<<5)+(h>>2)+(unsigned char)(str[l1-1])); - for (o = G(L)->strt.hash[lmod(h, G(L)->strt.size)]; - o != NULL; - o = o->gch.next) { - TString *ts = gcotots(o); - if (ts->tsv.len == l && (memcmp(str, getstr(ts), l) == 0)) - return ts; - } - return newlstr(L, str, l, h); /* not found */ -} - - -Udata *luaS_newudata (lua_State *L, size_t s) { - Udata *u; - u = cast(Udata *, luaM_malloc(L, sizeudata(s))); - u->uv.marked = (1<<1); /* is not finalized */ - u->uv.tt = LUA_TUSERDATA; - u->uv.len = s; - u->uv.metatable = hvalue(defaultmeta(L)); - /* chain it on udata list */ - u->uv.next = G(L)->rootudata; - G(L)->rootudata = valtogco(u); - return u; -} - +/*
+** $Id: lstring.c,v 1.3 2004-11-27 21:35:20 pixel Exp $
+** String table (keeps all strings handled by Lua)
+** See Copyright Notice in lua.h
+*/
+
+
+#include <string.h>
+
+#define lstring_c
+
+#include "lua.h"
+
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+
+
+
+void luaS_freeall (lua_State *L) {
+ lua_assert(G(L)->strt.nuse==0);
+ luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size, TString *);
+}
+
+
+void luaS_resize (lua_State *L, int newsize) {
+ GCObject **newhash = luaM_newvector(L, newsize, GCObject *);
+ stringtable *tb = &G(L)->strt;
+ int i;
+ for (i=0; i<newsize; i++) newhash[i] = NULL;
+ /* rehash */
+ for (i=0; i<tb->size; i++) {
+ GCObject *p = tb->hash[i];
+ while (p) { /* for each node in the list */
+ GCObject *next = p->gch.next; /* save next */
+ lu_hash h = gcotots(p)->tsv.hash;
+ int h1 = lmod(h, newsize); /* new position */
+ lua_assert(cast(int, h%newsize) == lmod(h, newsize));
+ p->gch.next = newhash[h1]; /* chain it */
+ newhash[h1] = p;
+ p = next;
+ }
+ }
+ luaM_freearray(L, tb->hash, tb->size, TString *);
+ tb->size = newsize;
+ tb->hash = newhash;
+}
+
+
+static TString *newlstr (lua_State *L, const char *str, size_t l, lu_hash h) {
+ TString *ts = cast(TString *, luaM_malloc(L, sizestring(l)));
+ stringtable *tb;
+ ts->tsv.len = l;
+ ts->tsv.hash = h;
+ ts->tsv.marked = 0;
+ ts->tsv.tt = LUA_TSTRING;
+ ts->tsv.reserved = 0;
+ memcpy(ts+1, str, l*sizeof(char));
+ ((char *)(ts+1))[l] = '\0'; /* ending 0 */
+ tb = &G(L)->strt;
+ h = lmod(h, tb->size);
+ ts->tsv.next = tb->hash[h]; /* chain new entry */
+ tb->hash[h] = valtogco(ts);
+ tb->nuse++;
+ if (tb->nuse > cast(ls_nstr, tb->size) && tb->size <= MAX_INT/2)
+ luaS_resize(L, tb->size*2); /* too crowded */
+ return ts;
+}
+
+
+TString *luaS_newlstr (lua_State *L, const char *str, size_t l) {
+ GCObject *o;
+ lu_hash h = (lu_hash)l; /* seed */
+ size_t step = (l>>5)+1; /* if string is too long, don't hash all its chars */
+ size_t l1;
+ for (l1=l; l1>=step; l1-=step) /* compute hash */
+ h = h ^ ((h<<5)+(h>>2)+(unsigned char)(str[l1-1]));
+ for (o = G(L)->strt.hash[lmod(h, G(L)->strt.size)];
+ o != NULL;
+ o = o->gch.next) {
+ TString *ts = gcotots(o);
+ if (ts->tsv.len == l && (memcmp(str, getstr(ts), l) == 0))
+ return ts;
+ }
+ return newlstr(L, str, l, h); /* not found */
+}
+
+
+Udata *luaS_newudata (lua_State *L, size_t s) {
+ Udata *u;
+ u = cast(Udata *, luaM_malloc(L, sizeudata(s)));
+ u->uv.marked = (1<<1); /* is not finalized */
+ u->uv.tt = LUA_TUSERDATA;
+ u->uv.len = s;
+ u->uv.metatable = hvalue(defaultmeta(L));
+ /* chain it on udata list */
+ u->uv.next = G(L)->rootudata;
+ G(L)->rootudata = valtogco(u);
+ return u;
+}
+
diff --git a/lib/lua/src/ltable.c b/lib/lua/src/ltable.c index cd5e576..9f4cb6c 100644 --- a/lib/lua/src/ltable.c +++ b/lib/lua/src/ltable.c @@ -1,509 +1,509 @@ -/* -** $Id: ltable.c,v 1.2 2003-12-11 16:53:30 pixel Exp $ -** Lua tables (hash) -** See Copyright Notice in lua.h -*/ - - -/* -** Implementation of tables (aka arrays, objects, or hash tables). -** Tables keep its elements in two parts: an array part and a hash part. -** Non-negative integer keys are all candidates to be kept in the array -** part. The actual size of the array is the largest `n' such that at -** least half the slots between 0 and n are in use. -** Hash uses a mix of chained scatter table with Brent's variation. -** A main invariant of these tables is that, if an element is not -** in its main position (i.e. the `original' position that its hash gives -** to it), then the colliding element is in its own main position. -** In other words, there are collisions only when two elements have the -** same main position (i.e. the same hash values for that table size). -** Because of that, the load factor of these tables can be 100% without -** performance penalties. -*/ - -#include <string.h> - -#define ltable_c - -#include "lua.h" - -#include "ldebug.h" -#include "ldo.h" -#include "lgc.h" -#include "lmem.h" -#include "lobject.h" -#include "lstate.h" -#include "ltable.h" - - -/* -** max size of array part is 2^MAXBITS -*/ -#if BITS_INT > 26 -#define MAXBITS 24 -#else -#define MAXBITS (BITS_INT-2) -#endif - -/* check whether `x' < 2^MAXBITS */ -#define toobig(x) ((((x)-1) >> MAXBITS) != 0) - - -/* function to convert a lua_Number to int (with any rounding method) */ -#ifndef lua_number2int -#define lua_number2int(i,n) ((i)=(int)(n)) -#endif - - -#define hashpow2(t,n) (gnode(t, lmod((n), sizenode(t)))) - -#define hashstr(t,str) hashpow2(t, (str)->tsv.hash) -#define hashboolean(t,p) hashpow2(t, p) - - -/* -** for some types, it is better to avoid modulus by power of 2, as -** they tend to have many 2 factors. -*/ -#define hashmod(t,n) (gnode(t, ((n) % ((sizenode(t)-1)|1)))) - - -#define hashpointer(t,p) hashmod(t, IntPoint(p)) - - -/* -** number of ints inside a lua_Number -*/ -#define numints cast(int, sizeof(lua_Number)/sizeof(int)) - - -/* -** hash for lua_Numbers -*/ -static Node *hashnum (const Table *t, lua_Number n) { - unsigned int a[numints]; - int i; - n += 1; /* normalize number (avoid -0) */ - lua_assert(sizeof(a) <= sizeof(n)); - memcpy(a, &n, sizeof(a)); - for (i = 1; i < numints; i++) a[0] += a[i]; - return hashmod(t, cast(lu_hash, a[0])); -} - - - -/* -** returns the `main' position of an element in a table (that is, the index -** of its hash value) -*/ -Node *luaH_mainposition (const Table *t, const TObject *key) { - switch (ttype(key)) { - case LUA_TNUMBER: - return hashnum(t, nvalue(key)); - case LUA_TSTRING: - return hashstr(t, tsvalue(key)); - case LUA_TBOOLEAN: - return hashboolean(t, bvalue(key)); - case LUA_TLIGHTUSERDATA: - return hashpointer(t, pvalue(key)); - default: - return hashpointer(t, gcvalue(key)); - } -} - - -/* -** returns the index for `key' if `key' is an appropriate key to live in -** the array part of the table, -1 otherwise. -*/ -static int arrayindex (const TObject *key) { - if (ttisnumber(key)) { - int k; - lua_number2int(k, (nvalue(key))); - if (cast(lua_Number, k) == nvalue(key) && k >= 1 && !toobig(k)) - return k; - } - return -1; /* `key' did not match some condition */ -} - - -/* -** returns the index of a `key' for table traversals. First goes all -** elements in the array part, then elements in the hash part. The -** beginning and end of a traversal are signalled by -1. -*/ -static int luaH_index (lua_State *L, Table *t, StkId key) { - int i; - if (ttisnil(key)) return -1; /* first iteration */ - i = arrayindex(key); - if (0 <= i && i <= t->sizearray) { /* is `key' inside array part? */ - return i-1; /* yes; that's the index (corrected to C) */ - } - else { - const TObject *v = luaH_get(t, key); - if (v == &luaO_nilobject) - luaG_runerror(L, "invalid key for `next'"); - i = cast(int, (cast(const lu_byte *, v) - - cast(const lu_byte *, gval(gnode(t, 0)))) / sizeof(Node)); - return i + t->sizearray; /* hash elements are numbered after array ones */ - } -} - - -int luaH_next (lua_State *L, Table *t, StkId key) { - int i = luaH_index(L, t, key); /* find original element */ - for (i++; i < t->sizearray; i++) { /* try first array part */ - if (!ttisnil(&t->array[i])) { /* a non-nil value? */ - setnvalue(key, cast(lua_Number, i+1)); - setobj2s(key+1, &t->array[i]); - return 1; - } - } - for (i -= t->sizearray; i < sizenode(t); i++) { /* then hash part */ - if (!ttisnil(gval(gnode(t, i)))) { /* a non-nil value? */ - setobj2s(key, gkey(gnode(t, i))); - setobj2s(key+1, gval(gnode(t, i))); - return 1; - } - } - return 0; /* no more elements */ -} - - -/* -** {============================================================= -** Rehash -** ============================================================== -*/ - - -static void computesizes (int nums[], int ntotal, int *narray, int *nhash) { - int i; - int a = nums[0]; /* number of elements smaller than 2^i */ - int na = a; /* number of elements to go to array part */ - int n = (na == 0) ? -1 : 0; /* (log of) optimal size for array part */ - for (i = 1; a < *narray && *narray >= twoto(i-1); i++) { - if (nums[i] > 0) { - a += nums[i]; - if (a >= twoto(i-1)) { /* more than half elements in use? */ - n = i; - na = a; - } - } - } - lua_assert(na <= *narray && *narray <= ntotal); - *nhash = ntotal - na; - *narray = (n == -1) ? 0 : twoto(n); - lua_assert(na <= *narray && na >= *narray/2); -} - - -static void numuse (const Table *t, int *narray, int *nhash) { - int nums[MAXBITS+1]; - int i, lg; - int totaluse = 0; - /* count elements in array part */ - for (i=0, lg=0; lg<=MAXBITS; lg++) { /* for each slice [2^(lg-1) to 2^lg) */ - int ttlg = twoto(lg); /* 2^lg */ - if (ttlg > t->sizearray) { - ttlg = t->sizearray; - if (i >= ttlg) break; - } - nums[lg] = 0; - for (; i<ttlg; i++) { - if (!ttisnil(&t->array[i])) { - nums[lg]++; - totaluse++; - } - } - } - for (; lg<=MAXBITS; lg++) nums[lg] = 0; /* reset other counts */ - *narray = totaluse; /* all previous uses were in array part */ - /* count elements in hash part */ - i = sizenode(t); - while (i--) { - Node *n = &t->node[i]; - if (!ttisnil(gval(n))) { - int k = arrayindex(gkey(n)); - if (k >= 0) { /* is `key' an appropriate array index? */ - nums[luaO_log2(k-1)+1]++; /* count as such */ - (*narray)++; - } - totaluse++; - } - } - computesizes(nums, totaluse, narray, nhash); -} - - -static void setarrayvector (lua_State *L, Table *t, int size) { - int i; - luaM_reallocvector(L, t->array, t->sizearray, size, TObject); - for (i=t->sizearray; i<size; i++) - setnilvalue(&t->array[i]); - t->sizearray = size; -} - - -static void setnodevector (lua_State *L, Table *t, int lsize) { - int i; - int size = twoto(lsize); - if (lsize > MAXBITS) - luaG_runerror(L, "table overflow"); - if (lsize == 0) { /* no elements to hash part? */ - t->node = G(L)->dummynode; /* use common `dummynode' */ - lua_assert(ttisnil(gkey(t->node))); /* assert invariants: */ - lua_assert(ttisnil(gval(t->node))); - lua_assert(t->node->next == NULL); /* (`dummynode' must be empty) */ - } - else { - t->node = luaM_newvector(L, size, Node); - for (i=0; i<size; i++) { - t->node[i].next = NULL; - setnilvalue(gkey(gnode(t, i))); - setnilvalue(gval(gnode(t, i))); - } - } - t->lsizenode = cast(lu_byte, lsize); - t->firstfree = gnode(t, size-1); /* first free position to be used */ -} - - -static void resize (lua_State *L, Table *t, int nasize, int nhsize) { - int i; - int oldasize = t->sizearray; - int oldhsize = t->lsizenode; - Node *nold; - Node temp[1]; - if (oldhsize) - nold = t->node; /* save old hash ... */ - else { /* old hash is `dummynode' */ - lua_assert(t->node == G(L)->dummynode); - temp[0] = t->node[0]; /* copy it to `temp' */ - nold = temp; - setnilvalue(gkey(G(L)->dummynode)); /* restate invariant */ - setnilvalue(gval(G(L)->dummynode)); - lua_assert(G(L)->dummynode->next == NULL); - } - if (nasize > oldasize) /* array part must grow? */ - setarrayvector(L, t, nasize); - /* create new hash part with appropriate size */ - setnodevector(L, t, nhsize); - /* re-insert elements */ - if (nasize < oldasize) { /* array part must shrink? */ - t->sizearray = nasize; - /* re-insert elements from vanishing slice */ - for (i=nasize; i<oldasize; i++) { - if (!ttisnil(&t->array[i])) - setobjt2t(luaH_setnum(L, t, i+1), &t->array[i]); - } - /* shrink array */ - luaM_reallocvector(L, t->array, oldasize, nasize, TObject); - } - /* re-insert elements in hash part */ - for (i = twoto(oldhsize) - 1; i >= 0; i--) { - Node *old = nold+i; - if (!ttisnil(gval(old))) - setobjt2t(luaH_set(L, t, gkey(old)), gval(old)); - } - if (oldhsize) - luaM_freearray(L, nold, twoto(oldhsize), Node); /* free old array */ -} - - -static void rehash (lua_State *L, Table *t) { - int nasize, nhsize; - numuse(t, &nasize, &nhsize); /* compute new sizes for array and hash parts */ - resize(L, t, nasize, luaO_log2(nhsize)+1); -} - - - -/* -** }============================================================= -*/ - - -Table *luaH_new (lua_State *L, int narray, int lnhash) { - Table *t = luaM_new(L, Table); - luaC_link(L, valtogco(t), LUA_TTABLE); - t->metatable = hvalue(defaultmeta(L)); - t->flags = cast(lu_byte, ~0); - /* temporary values (kept only if some malloc fails) */ - t->array = NULL; - t->sizearray = 0; - t->lsizenode = 0; - t->node = NULL; - setarrayvector(L, t, narray); - setnodevector(L, t, lnhash); - return t; -} - - -void luaH_free (lua_State *L, Table *t) { - if (t->lsizenode) - luaM_freearray(L, t->node, sizenode(t), Node); - luaM_freearray(L, t->array, t->sizearray, TObject); - luaM_freelem(L, t); -} - - -#if 0 -/* -** try to remove an element from a hash table; cannot move any element -** (because gc can call `remove' during a table traversal) -*/ -void luaH_remove (Table *t, Node *e) { - Node *mp = luaH_mainposition(t, gkey(e)); - if (e != mp) { /* element not in its main position? */ - while (mp->next != e) mp = mp->next; /* find previous */ - mp->next = e->next; /* remove `e' from its list */ - } - else { - if (e->next != NULL) ?? - } - lua_assert(ttisnil(gval(node))); - setnilvalue(gkey(e)); /* clear node `e' */ - e->next = NULL; -} -#endif - - -/* -** inserts a new key into a hash table; first, check whether key's main -** position is free. If not, check whether colliding node is in its main -** position or not: if it is not, move colliding node to an empty place and -** put new key in its main position; otherwise (colliding node is in its main -** position), new key goes to an empty position. -*/ -static TObject *newkey (lua_State *L, Table *t, const TObject *key) { - TObject *val; - Node *mp = luaH_mainposition(t, key); - if (!ttisnil(gval(mp))) { /* main position is not free? */ - Node *othern = luaH_mainposition(t, gkey(mp)); /* `mp' of colliding node */ - Node *n = t->firstfree; /* get a free place */ - if (othern != mp) { /* is colliding node out of its main position? */ - /* yes; move colliding node into free position */ - while (othern->next != mp) othern = othern->next; /* find previous */ - othern->next = n; /* redo the chain with `n' in place of `mp' */ - *n = *mp; /* copy colliding node into free pos. (mp->next also goes) */ - mp->next = NULL; /* now `mp' is free */ - setnilvalue(gval(mp)); - } - else { /* colliding node is in its own main position */ - /* new node will go into free position */ - n->next = mp->next; /* chain new position */ - mp->next = n; - mp = n; - } - } - setobj2t(gkey(mp), key); /* write barrier */ - lua_assert(ttisnil(gval(mp))); - for (;;) { /* correct `firstfree' */ - if (ttisnil(gkey(t->firstfree))) - return gval(mp); /* OK; table still has a free place */ - else if (t->firstfree == t->node) break; /* cannot decrement from here */ - else (t->firstfree)--; - } - /* no more free places; must create one */ - setbvalue(gval(mp), 0); /* avoid new key being removed */ - rehash(L, t); /* grow table */ - val = cast(TObject *, luaH_get(t, key)); /* get new position */ - lua_assert(ttisboolean(val)); - setnilvalue(val); - return val; -} - - -/* -** generic search function -*/ -static const TObject *luaH_getany (Table *t, const TObject *key) { - if (ttisnil(key)) return &luaO_nilobject; - else { - Node *n = luaH_mainposition(t, key); - do { /* check whether `key' is somewhere in the chain */ - if (luaO_rawequalObj(gkey(n), key)) return gval(n); /* that's it */ - else n = n->next; - } while (n); - return &luaO_nilobject; - } -} - - -/* -** search function for integers -*/ -const TObject *luaH_getnum (Table *t, int key) { - if (1 <= key && key <= t->sizearray) - return &t->array[key-1]; - else { - lua_Number nk = cast(lua_Number, key); - Node *n = hashnum(t, nk); - do { /* check whether `key' is somewhere in the chain */ - if (ttisnumber(gkey(n)) && nvalue(gkey(n)) == nk) - return gval(n); /* that's it */ - else n = n->next; - } while (n); - return &luaO_nilobject; - } -} - - -/* -** search function for strings -*/ -const TObject *luaH_getstr (Table *t, TString *key) { - Node *n = hashstr(t, key); - do { /* check whether `key' is somewhere in the chain */ - if (ttisstring(gkey(n)) && tsvalue(gkey(n)) == key) - return gval(n); /* that's it */ - else n = n->next; - } while (n); - return &luaO_nilobject; -} - - -/* -** main search function -*/ -const TObject *luaH_get (Table *t, const TObject *key) { - switch (ttype(key)) { - case LUA_TSTRING: return luaH_getstr(t, tsvalue(key)); - case LUA_TNUMBER: { - int k; - lua_number2int(k, (nvalue(key))); - if (cast(lua_Number, k) == nvalue(key)) /* is an integer index? */ - return luaH_getnum(t, k); /* use specialized version */ - /* else go through */ - } - default: return luaH_getany(t, key); - } -} - - -TObject *luaH_set (lua_State *L, Table *t, const TObject *key) { - const TObject *p = luaH_get(t, key); - t->flags = 0; - if (p != &luaO_nilobject) - return cast(TObject *, p); - else { - if (ttisnil(key)) luaG_runerror(L, "table index is nil"); - else if (ttisnumber(key) && nvalue(key) != nvalue(key)) - luaG_runerror(L, "table index is NaN"); - return newkey(L, t, key); - } -} - - -TObject *luaH_setnum (lua_State *L, Table *t, int key) { - const TObject *p = luaH_getnum(t, key); - if (p != &luaO_nilobject) - return cast(TObject *, p); - else { - TObject k; - setnvalue(&k, cast(lua_Number, key)); - return newkey(L, t, &k); - } -} - +/*
+** $Id: ltable.c,v 1.3 2004-11-27 21:35:20 pixel Exp $
+** Lua tables (hash)
+** See Copyright Notice in lua.h
+*/
+
+
+/*
+** Implementation of tables (aka arrays, objects, or hash tables).
+** Tables keep its elements in two parts: an array part and a hash part.
+** Non-negative integer keys are all candidates to be kept in the array
+** part. The actual size of the array is the largest `n' such that at
+** least half the slots between 0 and n are in use.
+** Hash uses a mix of chained scatter table with Brent's variation.
+** A main invariant of these tables is that, if an element is not
+** in its main position (i.e. the `original' position that its hash gives
+** to it), then the colliding element is in its own main position.
+** In other words, there are collisions only when two elements have the
+** same main position (i.e. the same hash values for that table size).
+** Because of that, the load factor of these tables can be 100% without
+** performance penalties.
+*/
+
+#include <string.h>
+
+#define ltable_c
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lgc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "ltable.h"
+
+
+/*
+** max size of array part is 2^MAXBITS
+*/
+#if BITS_INT > 26
+#define MAXBITS 24
+#else
+#define MAXBITS (BITS_INT-2)
+#endif
+
+/* check whether `x' < 2^MAXBITS */
+#define toobig(x) ((((x)-1) >> MAXBITS) != 0)
+
+
+/* function to convert a lua_Number to int (with any rounding method) */
+#ifndef lua_number2int
+#define lua_number2int(i,n) ((i)=(int)(n))
+#endif
+
+
+#define hashpow2(t,n) (gnode(t, lmod((n), sizenode(t))))
+
+#define hashstr(t,str) hashpow2(t, (str)->tsv.hash)
+#define hashboolean(t,p) hashpow2(t, p)
+
+
+/*
+** for some types, it is better to avoid modulus by power of 2, as
+** they tend to have many 2 factors.
+*/
+#define hashmod(t,n) (gnode(t, ((n) % ((sizenode(t)-1)|1))))
+
+
+#define hashpointer(t,p) hashmod(t, IntPoint(p))
+
+
+/*
+** number of ints inside a lua_Number
+*/
+#define numints cast(int, sizeof(lua_Number)/sizeof(int))
+
+
+/*
+** hash for lua_Numbers
+*/
+static Node *hashnum (const Table *t, lua_Number n) {
+ unsigned int a[numints];
+ int i;
+ n += 1; /* normalize number (avoid -0) */
+ lua_assert(sizeof(a) <= sizeof(n));
+ memcpy(a, &n, sizeof(a));
+ for (i = 1; i < numints; i++) a[0] += a[i];
+ return hashmod(t, cast(lu_hash, a[0]));
+}
+
+
+
+/*
+** returns the `main' position of an element in a table (that is, the index
+** of its hash value)
+*/
+Node *luaH_mainposition (const Table *t, const TObject *key) {
+ switch (ttype(key)) {
+ case LUA_TNUMBER:
+ return hashnum(t, nvalue(key));
+ case LUA_TSTRING:
+ return hashstr(t, tsvalue(key));
+ case LUA_TBOOLEAN:
+ return hashboolean(t, bvalue(key));
+ case LUA_TLIGHTUSERDATA:
+ return hashpointer(t, pvalue(key));
+ default:
+ return hashpointer(t, gcvalue(key));
+ }
+}
+
+
+/*
+** returns the index for `key' if `key' is an appropriate key to live in
+** the array part of the table, -1 otherwise.
+*/
+static int arrayindex (const TObject *key) {
+ if (ttisnumber(key)) {
+ int k;
+ lua_number2int(k, (nvalue(key)));
+ if (cast(lua_Number, k) == nvalue(key) && k >= 1 && !toobig(k))
+ return k;
+ }
+ return -1; /* `key' did not match some condition */
+}
+
+
+/*
+** returns the index of a `key' for table traversals. First goes all
+** elements in the array part, then elements in the hash part. The
+** beginning and end of a traversal are signalled by -1.
+*/
+static int luaH_index (lua_State *L, Table *t, StkId key) {
+ int i;
+ if (ttisnil(key)) return -1; /* first iteration */
+ i = arrayindex(key);
+ if (0 <= i && i <= t->sizearray) { /* is `key' inside array part? */
+ return i-1; /* yes; that's the index (corrected to C) */
+ }
+ else {
+ const TObject *v = luaH_get(t, key);
+ if (v == &luaO_nilobject)
+ luaG_runerror(L, "invalid key for `next'");
+ i = cast(int, (cast(const lu_byte *, v) -
+ cast(const lu_byte *, gval(gnode(t, 0)))) / sizeof(Node));
+ return i + t->sizearray; /* hash elements are numbered after array ones */
+ }
+}
+
+
+int luaH_next (lua_State *L, Table *t, StkId key) {
+ int i = luaH_index(L, t, key); /* find original element */
+ for (i++; i < t->sizearray; i++) { /* try first array part */
+ if (!ttisnil(&t->array[i])) { /* a non-nil value? */
+ setnvalue(key, cast(lua_Number, i+1));
+ setobj2s(key+1, &t->array[i]);
+ return 1;
+ }
+ }
+ for (i -= t->sizearray; i < sizenode(t); i++) { /* then hash part */
+ if (!ttisnil(gval(gnode(t, i)))) { /* a non-nil value? */
+ setobj2s(key, gkey(gnode(t, i)));
+ setobj2s(key+1, gval(gnode(t, i)));
+ return 1;
+ }
+ }
+ return 0; /* no more elements */
+}
+
+
+/*
+** {=============================================================
+** Rehash
+** ==============================================================
+*/
+
+
+static void computesizes (int nums[], int ntotal, int *narray, int *nhash) {
+ int i;
+ int a = nums[0]; /* number of elements smaller than 2^i */
+ int na = a; /* number of elements to go to array part */
+ int n = (na == 0) ? -1 : 0; /* (log of) optimal size for array part */
+ for (i = 1; a < *narray && *narray >= twoto(i-1); i++) {
+ if (nums[i] > 0) {
+ a += nums[i];
+ if (a >= twoto(i-1)) { /* more than half elements in use? */
+ n = i;
+ na = a;
+ }
+ }
+ }
+ lua_assert(na <= *narray && *narray <= ntotal);
+ *nhash = ntotal - na;
+ *narray = (n == -1) ? 0 : twoto(n);
+ lua_assert(na <= *narray && na >= *narray/2);
+}
+
+
+static void numuse (const Table *t, int *narray, int *nhash) {
+ int nums[MAXBITS+1];
+ int i, lg;
+ int totaluse = 0;
+ /* count elements in array part */
+ for (i=0, lg=0; lg<=MAXBITS; lg++) { /* for each slice [2^(lg-1) to 2^lg) */
+ int ttlg = twoto(lg); /* 2^lg */
+ if (ttlg > t->sizearray) {
+ ttlg = t->sizearray;
+ if (i >= ttlg) break;
+ }
+ nums[lg] = 0;
+ for (; i<ttlg; i++) {
+ if (!ttisnil(&t->array[i])) {
+ nums[lg]++;
+ totaluse++;
+ }
+ }
+ }
+ for (; lg<=MAXBITS; lg++) nums[lg] = 0; /* reset other counts */
+ *narray = totaluse; /* all previous uses were in array part */
+ /* count elements in hash part */
+ i = sizenode(t);
+ while (i--) {
+ Node *n = &t->node[i];
+ if (!ttisnil(gval(n))) {
+ int k = arrayindex(gkey(n));
+ if (k >= 0) { /* is `key' an appropriate array index? */
+ nums[luaO_log2(k-1)+1]++; /* count as such */
+ (*narray)++;
+ }
+ totaluse++;
+ }
+ }
+ computesizes(nums, totaluse, narray, nhash);
+}
+
+
+static void setarrayvector (lua_State *L, Table *t, int size) {
+ int i;
+ luaM_reallocvector(L, t->array, t->sizearray, size, TObject);
+ for (i=t->sizearray; i<size; i++)
+ setnilvalue(&t->array[i]);
+ t->sizearray = size;
+}
+
+
+static void setnodevector (lua_State *L, Table *t, int lsize) {
+ int i;
+ int size = twoto(lsize);
+ if (lsize > MAXBITS)
+ luaG_runerror(L, "table overflow");
+ if (lsize == 0) { /* no elements to hash part? */
+ t->node = G(L)->dummynode; /* use common `dummynode' */
+ lua_assert(ttisnil(gkey(t->node))); /* assert invariants: */
+ lua_assert(ttisnil(gval(t->node)));
+ lua_assert(t->node->next == NULL); /* (`dummynode' must be empty) */
+ }
+ else {
+ t->node = luaM_newvector(L, size, Node);
+ for (i=0; i<size; i++) {
+ t->node[i].next = NULL;
+ setnilvalue(gkey(gnode(t, i)));
+ setnilvalue(gval(gnode(t, i)));
+ }
+ }
+ t->lsizenode = cast(lu_byte, lsize);
+ t->firstfree = gnode(t, size-1); /* first free position to be used */
+}
+
+
+static void resize (lua_State *L, Table *t, int nasize, int nhsize) {
+ int i;
+ int oldasize = t->sizearray;
+ int oldhsize = t->lsizenode;
+ Node *nold;
+ Node temp[1];
+ if (oldhsize)
+ nold = t->node; /* save old hash ... */
+ else { /* old hash is `dummynode' */
+ lua_assert(t->node == G(L)->dummynode);
+ temp[0] = t->node[0]; /* copy it to `temp' */
+ nold = temp;
+ setnilvalue(gkey(G(L)->dummynode)); /* restate invariant */
+ setnilvalue(gval(G(L)->dummynode));
+ lua_assert(G(L)->dummynode->next == NULL);
+ }
+ if (nasize > oldasize) /* array part must grow? */
+ setarrayvector(L, t, nasize);
+ /* create new hash part with appropriate size */
+ setnodevector(L, t, nhsize);
+ /* re-insert elements */
+ if (nasize < oldasize) { /* array part must shrink? */
+ t->sizearray = nasize;
+ /* re-insert elements from vanishing slice */
+ for (i=nasize; i<oldasize; i++) {
+ if (!ttisnil(&t->array[i]))
+ setobjt2t(luaH_setnum(L, t, i+1), &t->array[i]);
+ }
+ /* shrink array */
+ luaM_reallocvector(L, t->array, oldasize, nasize, TObject);
+ }
+ /* re-insert elements in hash part */
+ for (i = twoto(oldhsize) - 1; i >= 0; i--) {
+ Node *old = nold+i;
+ if (!ttisnil(gval(old)))
+ setobjt2t(luaH_set(L, t, gkey(old)), gval(old));
+ }
+ if (oldhsize)
+ luaM_freearray(L, nold, twoto(oldhsize), Node); /* free old array */
+}
+
+
+static void rehash (lua_State *L, Table *t) {
+ int nasize, nhsize;
+ numuse(t, &nasize, &nhsize); /* compute new sizes for array and hash parts */
+ resize(L, t, nasize, luaO_log2(nhsize)+1);
+}
+
+
+
+/*
+** }=============================================================
+*/
+
+
+Table *luaH_new (lua_State *L, int narray, int lnhash) {
+ Table *t = luaM_new(L, Table);
+ luaC_link(L, valtogco(t), LUA_TTABLE);
+ t->metatable = hvalue(defaultmeta(L));
+ t->flags = cast(lu_byte, ~0);
+ /* temporary values (kept only if some malloc fails) */
+ t->array = NULL;
+ t->sizearray = 0;
+ t->lsizenode = 0;
+ t->node = NULL;
+ setarrayvector(L, t, narray);
+ setnodevector(L, t, lnhash);
+ return t;
+}
+
+
+void luaH_free (lua_State *L, Table *t) {
+ if (t->lsizenode)
+ luaM_freearray(L, t->node, sizenode(t), Node);
+ luaM_freearray(L, t->array, t->sizearray, TObject);
+ luaM_freelem(L, t);
+}
+
+
+#if 0
+/*
+** try to remove an element from a hash table; cannot move any element
+** (because gc can call `remove' during a table traversal)
+*/
+void luaH_remove (Table *t, Node *e) {
+ Node *mp = luaH_mainposition(t, gkey(e));
+ if (e != mp) { /* element not in its main position? */
+ while (mp->next != e) mp = mp->next; /* find previous */
+ mp->next = e->next; /* remove `e' from its list */
+ }
+ else {
+ if (e->next != NULL) ??
+ }
+ lua_assert(ttisnil(gval(node)));
+ setnilvalue(gkey(e)); /* clear node `e' */
+ e->next = NULL;
+}
+#endif
+
+
+/*
+** inserts a new key into a hash table; first, check whether key's main
+** position is free. If not, check whether colliding node is in its main
+** position or not: if it is not, move colliding node to an empty place and
+** put new key in its main position; otherwise (colliding node is in its main
+** position), new key goes to an empty position.
+*/
+static TObject *newkey (lua_State *L, Table *t, const TObject *key) {
+ TObject *val;
+ Node *mp = luaH_mainposition(t, key);
+ if (!ttisnil(gval(mp))) { /* main position is not free? */
+ Node *othern = luaH_mainposition(t, gkey(mp)); /* `mp' of colliding node */
+ Node *n = t->firstfree; /* get a free place */
+ if (othern != mp) { /* is colliding node out of its main position? */
+ /* yes; move colliding node into free position */
+ while (othern->next != mp) othern = othern->next; /* find previous */
+ othern->next = n; /* redo the chain with `n' in place of `mp' */
+ *n = *mp; /* copy colliding node into free pos. (mp->next also goes) */
+ mp->next = NULL; /* now `mp' is free */
+ setnilvalue(gval(mp));
+ }
+ else { /* colliding node is in its own main position */
+ /* new node will go into free position */
+ n->next = mp->next; /* chain new position */
+ mp->next = n;
+ mp = n;
+ }
+ }
+ setobj2t(gkey(mp), key); /* write barrier */
+ lua_assert(ttisnil(gval(mp)));
+ for (;;) { /* correct `firstfree' */
+ if (ttisnil(gkey(t->firstfree)))
+ return gval(mp); /* OK; table still has a free place */
+ else if (t->firstfree == t->node) break; /* cannot decrement from here */
+ else (t->firstfree)--;
+ }
+ /* no more free places; must create one */
+ setbvalue(gval(mp), 0); /* avoid new key being removed */
+ rehash(L, t); /* grow table */
+ val = cast(TObject *, luaH_get(t, key)); /* get new position */
+ lua_assert(ttisboolean(val));
+ setnilvalue(val);
+ return val;
+}
+
+
+/*
+** generic search function
+*/
+static const TObject *luaH_getany (Table *t, const TObject *key) {
+ if (ttisnil(key)) return &luaO_nilobject;
+ else {
+ Node *n = luaH_mainposition(t, key);
+ do { /* check whether `key' is somewhere in the chain */
+ if (luaO_rawequalObj(gkey(n), key)) return gval(n); /* that's it */
+ else n = n->next;
+ } while (n);
+ return &luaO_nilobject;
+ }
+}
+
+
+/*
+** search function for integers
+*/
+const TObject *luaH_getnum (Table *t, int key) {
+ if (1 <= key && key <= t->sizearray)
+ return &t->array[key-1];
+ else {
+ lua_Number nk = cast(lua_Number, key);
+ Node *n = hashnum(t, nk);
+ do { /* check whether `key' is somewhere in the chain */
+ if (ttisnumber(gkey(n)) && nvalue(gkey(n)) == nk)
+ return gval(n); /* that's it */
+ else n = n->next;
+ } while (n);
+ return &luaO_nilobject;
+ }
+}
+
+
+/*
+** search function for strings
+*/
+const TObject *luaH_getstr (Table *t, TString *key) {
+ Node *n = hashstr(t, key);
+ do { /* check whether `key' is somewhere in the chain */
+ if (ttisstring(gkey(n)) && tsvalue(gkey(n)) == key)
+ return gval(n); /* that's it */
+ else n = n->next;
+ } while (n);
+ return &luaO_nilobject;
+}
+
+
+/*
+** main search function
+*/
+const TObject *luaH_get (Table *t, const TObject *key) {
+ switch (ttype(key)) {
+ case LUA_TSTRING: return luaH_getstr(t, tsvalue(key));
+ case LUA_TNUMBER: {
+ int k;
+ lua_number2int(k, (nvalue(key)));
+ if (cast(lua_Number, k) == nvalue(key)) /* is an integer index? */
+ return luaH_getnum(t, k); /* use specialized version */
+ /* else go through */
+ }
+ default: return luaH_getany(t, key);
+ }
+}
+
+
+TObject *luaH_set (lua_State *L, Table *t, const TObject *key) {
+ const TObject *p = luaH_get(t, key);
+ t->flags = 0;
+ if (p != &luaO_nilobject)
+ return cast(TObject *, p);
+ else {
+ if (ttisnil(key)) luaG_runerror(L, "table index is nil");
+ else if (ttisnumber(key) && nvalue(key) != nvalue(key))
+ luaG_runerror(L, "table index is NaN");
+ return newkey(L, t, key);
+ }
+}
+
+
+TObject *luaH_setnum (lua_State *L, Table *t, int key) {
+ const TObject *p = luaH_getnum(t, key);
+ if (p != &luaO_nilobject)
+ return cast(TObject *, p);
+ else {
+ TObject k;
+ setnvalue(&k, cast(lua_Number, key));
+ return newkey(L, t, &k);
+ }
+}
+
diff --git a/lib/lua/src/ltests.c b/lib/lua/src/ltests.c index 79ae526..8e53314 100644 --- a/lib/lua/src/ltests.c +++ b/lib/lua/src/ltests.c @@ -1,852 +1,852 @@ -/* -** $Id: ltests.c,v 1.2 2003-12-11 16:53:30 pixel Exp $ -** Internal Module for Debugging of the Lua Implementation -** See Copyright Notice in lua.h -*/ - - -#include <ctype.h> -#include <limits.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#define ltests_c - -#include "lua.h" - -#include "lapi.h" -#include "lauxlib.h" -#include "lcode.h" -#include "ldebug.h" -#include "ldo.h" -#include "lfunc.h" -#include "lmem.h" -#include "lopcodes.h" -#include "lstate.h" -#include "lstring.h" -#include "ltable.h" -#include "lualib.h" - - - -/* -** The whole module only makes sense with LUA_DEBUG on -*/ -#ifdef LUA_DEBUG - - -#define lua_pushintegral(L,i) lua_pushnumber(L, cast(lua_Number, (i))) - - -static lua_State *lua_state = NULL; - -int islocked = 0; - - -#define func_at(L,k) (L->ci->base+(k) - 1) - - -static void setnameval (lua_State *L, const char *name, int val) { - lua_pushstring(L, name); - lua_pushintegral(L, val); - lua_settable(L, -3); -} - - -/* -** {====================================================================== -** Controlled version for realloc. -** ======================================================================= -*/ - -#define MARK 0x55 /* 01010101 (a nice pattern) */ - -#ifndef EXTERNMEMCHECK -/* full memory check */ -#define HEADER (sizeof(L_Umaxalign)) /* ensures maximum alignment for HEADER */ -#define MARKSIZE 16 /* size of marks after each block */ -#define blockhead(b) (cast(char *, b) - HEADER) -#define setsize(newblock, size) (*cast(size_t *, newblock) = size) -#define checkblocksize(b, size) (size == (*cast(size_t *, blockhead(b)))) -#define fillmem(mem,size) memset(mem, -MARK, size) -#else -/* external memory check: don't do it twice */ -#define HEADER 0 -#define MARKSIZE 0 -#define blockhead(b) (b) -#define setsize(newblock, size) /* empty */ -#define checkblocksize(b,size) (1) -#define fillmem(mem,size) /* empty */ -#endif - -unsigned long memdebug_numblocks = 0; -unsigned long memdebug_total = 0; -unsigned long memdebug_maxmem = 0; -unsigned long memdebug_memlimit = ULONG_MAX; - - -static void *checkblock (void *block, size_t size) { - void *b = blockhead(block); - int i; - for (i=0;i<MARKSIZE;i++) - lua_assert(*(cast(char *, b)+HEADER+size+i) == MARK+i); /* corrupted block? */ - return b; -} - - -static void freeblock (void *block, size_t size) { - if (block) { - lua_assert(checkblocksize(block, size)); - block = checkblock(block, size); - fillmem(block, size+HEADER+MARKSIZE); /* erase block */ - free(block); /* free original block */ - memdebug_numblocks--; - memdebug_total -= size; - } -} - - -void *debug_realloc (void *block, size_t oldsize, size_t size) { - lua_assert(oldsize == 0 || checkblocksize(block, oldsize)); - /* ISO does not specify what realloc(NULL, 0) does */ - lua_assert(block != NULL || size > 0); - if (size == 0) { - freeblock(block, oldsize); - return NULL; - } - else if (size > oldsize && memdebug_total+size-oldsize > memdebug_memlimit) - return NULL; /* to test memory allocation errors */ - else { - void *newblock; - int i; - size_t realsize = HEADER+size+MARKSIZE; - size_t commonsize = (oldsize < size) ? oldsize : size; - if (realsize < size) return NULL; /* overflow! */ - newblock = malloc(realsize); /* alloc a new block */ - if (newblock == NULL) return NULL; - if (block) { - memcpy(cast(char *, newblock)+HEADER, block, commonsize); - freeblock(block, oldsize); /* erase (and check) old copy */ - } - /* initialize new part of the block with something `weird' */ - fillmem(cast(char *, newblock)+HEADER+commonsize, size-commonsize); - memdebug_total += size; - if (memdebug_total > memdebug_maxmem) - memdebug_maxmem = memdebug_total; - memdebug_numblocks++; - setsize(newblock, size); - for (i=0;i<MARKSIZE;i++) - *(cast(char *, newblock)+HEADER+size+i) = cast(char, MARK+i); - return cast(char *, newblock)+HEADER; - } -} - - -/* }====================================================================== */ - - - -/* -** {====================================================== -** Disassembler -** ======================================================= -*/ - - -static char *buildop (Proto *p, int pc, char *buff) { - Instruction i = p->code[pc]; - OpCode o = GET_OPCODE(i); - const char *name = luaP_opnames[o]; - int line = getline(p, pc); - sprintf(buff, "(%4d) %4d - ", line, pc); - switch (getOpMode(o)) { - case iABC: - sprintf(buff+strlen(buff), "%-12s%4d %4d %4d", name, - GETARG_A(i), GETARG_B(i), GETARG_C(i)); - break; - case iABx: - sprintf(buff+strlen(buff), "%-12s%4d %4d", name, GETARG_A(i), GETARG_Bx(i)); - break; - case iAsBx: - sprintf(buff+strlen(buff), "%-12s%4d %4d", name, GETARG_A(i), GETARG_sBx(i)); - break; - } - return buff; -} - - -#if 0 -void luaI_printcode (Proto *pt, int size) { - int pc; - for (pc=0; pc<size; pc++) { - char buff[100]; - printf("%s\n", buildop(pt, pc, buff)); - } - printf("-------\n"); -} -#endif - - -static int listcode (lua_State *L) { - int pc; - Proto *p; - luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), - 1, "Lua function expected"); - p = clvalue(func_at(L, 1))->l.p; - lua_newtable(L); - setnameval(L, "maxstack", p->maxstacksize); - setnameval(L, "numparams", p->numparams); - for (pc=0; pc<p->sizecode; pc++) { - char buff[100]; - lua_pushintegral(L, pc+1); - lua_pushstring(L, buildop(p, pc, buff)); - lua_settable(L, -3); - } - return 1; -} - - -static int listk (lua_State *L) { - Proto *p; - int i; - luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), - 1, "Lua function expected"); - p = clvalue(func_at(L, 1))->l.p; - lua_newtable(L); - for (i=0; i<p->sizek; i++) { - lua_pushintegral(L, i+1); - luaA_pushobject(L, p->k+i); - lua_settable(L, -3); - } - return 1; -} - - -static int listlocals (lua_State *L) { - Proto *p; - int pc = luaL_checkint(L, 2) - 1; - int i = 0; - const char *name; - luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), - 1, "Lua function expected"); - p = clvalue(func_at(L, 1))->l.p; - while ((name = luaF_getlocalname(p, ++i, pc)) != NULL) - lua_pushstring(L, name); - return i-1; -} - -/* }====================================================== */ - - - - -static int get_limits (lua_State *L) { - lua_newtable(L); - setnameval(L, "BITS_INT", BITS_INT); - setnameval(L, "LFPF", LFIELDS_PER_FLUSH); - setnameval(L, "MAXVARS", MAXVARS); - setnameval(L, "MAXPARAMS", MAXPARAMS); - setnameval(L, "MAXSTACK", MAXSTACK); - setnameval(L, "MAXUPVALUES", MAXUPVALUES); - return 1; -} - - -static int mem_query (lua_State *L) { - if (lua_isnone(L, 1)) { - lua_pushintegral(L, memdebug_total); - lua_pushintegral(L, memdebug_numblocks); - lua_pushintegral(L, memdebug_maxmem); - return 3; - } - else { - memdebug_memlimit = luaL_checkint(L, 1); - return 0; - } -} - - -static int hash_query (lua_State *L) { - if (lua_isnone(L, 2)) { - luaL_argcheck(L, lua_type(L, 1) == LUA_TSTRING, 1, "string expected"); - lua_pushintegral(L, tsvalue(func_at(L, 1))->tsv.hash); - } - else { - TObject *o = func_at(L, 1); - Table *t; - luaL_checktype(L, 2, LUA_TTABLE); - t = hvalue(func_at(L, 2)); - lua_pushintegral(L, luaH_mainposition(t, o) - t->node); - } - return 1; -} - - -static int stacklevel (lua_State *L) { - unsigned long a = 0; - lua_pushintegral(L, (int)(L->top - L->stack)); - lua_pushintegral(L, (int)(L->stack_last - L->stack)); - lua_pushintegral(L, (int)(L->ci - L->base_ci)); - lua_pushintegral(L, (int)(L->end_ci - L->base_ci)); - lua_pushintegral(L, (unsigned long)&a); - return 5; -} - - -static int table_query (lua_State *L) { - const Table *t; - int i = luaL_optint(L, 2, -1); - luaL_checktype(L, 1, LUA_TTABLE); - t = hvalue(func_at(L, 1)); - if (i == -1) { - lua_pushintegral(L, t->sizearray); - lua_pushintegral(L, sizenode(t)); - lua_pushintegral(L, t->firstfree - t->node); - } - else if (i < t->sizearray) { - lua_pushintegral(L, i); - luaA_pushobject(L, &t->array[i]); - lua_pushnil(L); - } - else if ((i -= t->sizearray) < sizenode(t)) { - if (!ttisnil(gval(gnode(t, i))) || - ttisnil(gkey(gnode(t, i))) || - ttisnumber(gkey(gnode(t, i)))) { - luaA_pushobject(L, gkey(gnode(t, i))); - } - else - lua_pushstring(L, "<undef>"); - luaA_pushobject(L, gval(gnode(t, i))); - if (t->node[i].next) - lua_pushintegral(L, t->node[i].next - t->node); - else - lua_pushnil(L); - } - return 3; -} - - -static int string_query (lua_State *L) { - stringtable *tb = &G(L)->strt; - int s = luaL_optint(L, 2, 0) - 1; - if (s==-1) { - lua_pushintegral(L ,tb->nuse); - lua_pushintegral(L ,tb->size); - return 2; - } - else if (s < tb->size) { - GCObject *ts; - int n = 0; - for (ts = tb->hash[s]; ts; ts = ts->gch.next) { - setsvalue2s(L->top, gcotots(ts)); - incr_top(L); - n++; - } - return n; - } - return 0; -} - - -static int tref (lua_State *L) { - int level = lua_gettop(L); - int lock = luaL_optint(L, 2, 1); - luaL_checkany(L, 1); - lua_pushvalue(L, 1); - lua_pushintegral(L, lua_ref(L, lock)); - assert(lua_gettop(L) == level+1); /* +1 for result */ - return 1; -} - -static int getref (lua_State *L) { - int level = lua_gettop(L); - lua_getref(L, luaL_checkint(L, 1)); - assert(lua_gettop(L) == level+1); - return 1; -} - -static int unref (lua_State *L) { - int level = lua_gettop(L); - lua_unref(L, luaL_checkint(L, 1)); - assert(lua_gettop(L) == level); - return 0; -} - -static int metatable (lua_State *L) { - luaL_checkany(L, 1); - if (lua_isnone(L, 2)) { - if (lua_getmetatable(L, 1) == 0) - lua_pushnil(L); - } - else { - lua_settop(L, 2); - luaL_checktype(L, 2, LUA_TTABLE); - lua_setmetatable(L, 1); - } - return 1; -} - - -static int upvalue (lua_State *L) { - int n = luaL_checkint(L, 2); - luaL_checktype(L, 1, LUA_TFUNCTION); - if (lua_isnone(L, 3)) { - const char *name = lua_getupvalue(L, 1, n); - if (name == NULL) return 0; - lua_pushstring(L, name); - return 2; - } - else { - const char *name = lua_setupvalue(L, 1, n); - lua_pushstring(L, name); - return 1; - } -} - - -static int newuserdata (lua_State *L) { - size_t size = luaL_checkint(L, 1); - char *p = cast(char *, lua_newuserdata(L, size)); - while (size--) *p++ = '\0'; - return 1; -} - - -static int pushuserdata (lua_State *L) { - lua_pushlightuserdata(L, cast(void *, luaL_checkint(L, 1))); - return 1; -} - - -static int udataval (lua_State *L) { - lua_pushintegral(L, cast(int, lua_touserdata(L, 1))); - return 1; -} - - -static int doonnewstack (lua_State *L) { - lua_State *L1 = lua_newthread(L); - size_t l; - const char *s = luaL_checklstring(L, 1, &l); - int status = luaL_loadbuffer(L1, s, l, s); - if (status == 0) - status = lua_pcall(L1, 0, 0, 0); - lua_pushintegral(L, status); - return 1; -} - - -static int s2d (lua_State *L) { - lua_pushnumber(L, *cast(const double *, luaL_checkstring(L, 1))); - return 1; -} - -static int d2s (lua_State *L) { - double d = luaL_checknumber(L, 1); - lua_pushlstring(L, cast(char *, &d), sizeof(d)); - return 1; -} - - -static int newstate (lua_State *L) { - lua_State *L1 = lua_open(); - if (L1) { - lua_userstateopen(L1); /* init lock */ - lua_pushintegral(L, (unsigned long)L1); - } - else - lua_pushnil(L); - return 1; -} - - -static int loadlib (lua_State *L) { - static const luaL_reg libs[] = { - {"mathlibopen", luaopen_math}, - {"strlibopen", luaopen_string}, - {"iolibopen", luaopen_io}, - {"tablibopen", luaopen_table}, - {"dblibopen", luaopen_debug}, - {"baselibopen", luaopen_base}, - {NULL, NULL} - }; - lua_State *L1 = cast(lua_State *, - cast(unsigned long, luaL_checknumber(L, 1))); - lua_pushvalue(L1, LUA_GLOBALSINDEX); - luaL_openlib(L1, NULL, libs, 0); - return 0; -} - -static int closestate (lua_State *L) { - lua_State *L1 = cast(lua_State *, cast(unsigned long, luaL_checknumber(L, 1))); - lua_close(L1); - lua_unlock(L); /* close cannot unlock that */ - return 0; -} - -static int doremote (lua_State *L) { - lua_State *L1 = cast(lua_State *,cast(unsigned long,luaL_checknumber(L, 1))); - size_t lcode; - const char *code = luaL_checklstring(L, 2, &lcode); - int status; - lua_settop(L1, 0); - status = luaL_loadbuffer(L1, code, lcode, code); - if (status == 0) - status = lua_pcall(L1, 0, LUA_MULTRET, 0); - if (status != 0) { - lua_pushnil(L); - lua_pushintegral(L, status); - lua_pushstring(L, lua_tostring(L1, -1)); - return 3; - } - else { - int i = 0; - while (!lua_isnone(L1, ++i)) - lua_pushstring(L, lua_tostring(L1, i)); - lua_pop(L1, i-1); - return i-1; - } -} - - -static int log2_aux (lua_State *L) { - lua_pushintegral(L, luaO_log2(luaL_checkint(L, 1))); - return 1; -} - -static int int2fb_aux (lua_State *L) { - int b = luaO_int2fb(luaL_checkint(L, 1)); - lua_pushintegral(L, b); - lua_pushintegral(L, fb2int(b)); - return 2; -} - - -static int test_do (lua_State *L) { - const char *p = luaL_checkstring(L, 1); - if (*p == '@') - lua_dofile(L, p+1); - else - lua_dostring(L, p); - return lua_gettop(L); -} - - - -/* -** {====================================================== -** function to test the API with C. It interprets a kind of assembler -** language with calls to the API, so the test can be driven by Lua code -** ======================================================= -*/ - -static const char *const delimits = " \t\n,;"; - -static void skip (const char **pc) { - while (**pc != '\0' && strchr(delimits, **pc)) (*pc)++; -} - -static int getnum_aux (lua_State *L, const char **pc) { - int res = 0; - int sig = 1; - skip(pc); - if (**pc == '.') { - res = cast(int, lua_tonumber(L, -1)); - lua_pop(L, 1); - (*pc)++; - return res; - } - else if (**pc == '-') { - sig = -1; - (*pc)++; - } - while (isdigit(cast(int, **pc))) res = res*10 + (*(*pc)++) - '0'; - return sig*res; -} - -static const char *getname_aux (char *buff, const char **pc) { - int i = 0; - skip(pc); - while (**pc != '\0' && !strchr(delimits, **pc)) - buff[i++] = *(*pc)++; - buff[i] = '\0'; - return buff; -} - - -#define EQ(s1) (strcmp(s1, inst) == 0) - -#define getnum (getnum_aux(L, &pc)) -#define getname (getname_aux(buff, &pc)) - - -static int testC (lua_State *L) { - char buff[30]; - const char *pc = luaL_checkstring(L, 1); - for (;;) { - const char *inst = getname; - if EQ("") return 0; - else if EQ("isnumber") { - lua_pushintegral(L, lua_isnumber(L, getnum)); - } - else if EQ("isstring") { - lua_pushintegral(L, lua_isstring(L, getnum)); - } - else if EQ("istable") { - lua_pushintegral(L, lua_istable(L, getnum)); - } - else if EQ("iscfunction") { - lua_pushintegral(L, lua_iscfunction(L, getnum)); - } - else if EQ("isfunction") { - lua_pushintegral(L, lua_isfunction(L, getnum)); - } - else if EQ("isuserdata") { - lua_pushintegral(L, lua_isuserdata(L, getnum)); - } - else if EQ("isudataval") { - lua_pushintegral(L, lua_islightuserdata(L, getnum)); - } - else if EQ("isnil") { - lua_pushintegral(L, lua_isnil(L, getnum)); - } - else if EQ("isnull") { - lua_pushintegral(L, lua_isnone(L, getnum)); - } - else if EQ("tonumber") { - lua_pushnumber(L, lua_tonumber(L, getnum)); - } - else if EQ("tostring") { - const char *s = lua_tostring(L, getnum); - lua_pushstring(L, s); - } - else if EQ("strlen") { - lua_pushintegral(L, lua_strlen(L, getnum)); - } - else if EQ("tocfunction") { - lua_pushcfunction(L, lua_tocfunction(L, getnum)); - } - else if EQ("return") { - return getnum; - } - else if EQ("gettop") { - lua_pushintegral(L, lua_gettop(L)); - } - else if EQ("settop") { - lua_settop(L, getnum); - } - else if EQ("pop") { - lua_pop(L, getnum); - } - else if EQ("pushnum") { - lua_pushintegral(L, getnum); - } - else if EQ("pushnil") { - lua_pushnil(L); - } - else if EQ("pushbool") { - lua_pushboolean(L, getnum); - } - else if EQ("tobool") { - lua_pushintegral(L, lua_toboolean(L, getnum)); - } - else if EQ("pushvalue") { - lua_pushvalue(L, getnum); - } - else if EQ("pushcclosure") { - lua_pushcclosure(L, testC, getnum); - } - else if EQ("pushupvalues") { - lua_pushupvalues(L); - } - else if EQ("remove") { - lua_remove(L, getnum); - } - else if EQ("insert") { - lua_insert(L, getnum); - } - else if EQ("replace") { - lua_replace(L, getnum); - } - else if EQ("gettable") { - lua_gettable(L, getnum); - } - else if EQ("settable") { - lua_settable(L, getnum); - } - else if EQ("next") { - lua_next(L, -2); - } - else if EQ("concat") { - lua_concat(L, getnum); - } - else if EQ("lessthan") { - int a = getnum; - lua_pushboolean(L, lua_lessthan(L, a, getnum)); - } - else if EQ("equal") { - int a = getnum; - lua_pushboolean(L, lua_equal(L, a, getnum)); - } - else if EQ("rawcall") { - int narg = getnum; - int nres = getnum; - lua_call(L, narg, nres); - } - else if EQ("call") { - int narg = getnum; - int nres = getnum; - lua_pcall(L, narg, nres, 0); - } - else if EQ("loadstring") { - size_t sl; - const char *s = luaL_checklstring(L, getnum, &sl); - luaL_loadbuffer(L, s, sl, s); - } - else if EQ("loadfile") { - luaL_loadfile(L, luaL_checkstring(L, getnum)); - } - else if EQ("setmetatable") { - lua_setmetatable(L, getnum); - } - else if EQ("getmetatable") { - if (lua_getmetatable(L, getnum) == 0) - lua_pushnil(L); - } - else if EQ("type") { - lua_pushstring(L, lua_typename(L, lua_type(L, getnum))); - } - else if EQ("getn") { - int i = getnum; - lua_pushintegral(L, luaL_getn(L, i)); - } - else if EQ("setn") { - int i = getnum; - int n = cast(int, lua_tonumber(L, -1)); - luaL_setn(L, i, n); - lua_pop(L, 1); - } - else luaL_error(L, "unknown instruction %s", buff); - } - return 0; -} - -/* }====================================================== */ - - -/* -** {====================================================== -** tests for yield inside hooks -** ======================================================= -*/ - -static void yieldf (lua_State *L, lua_Debug *ar) { - lua_yield(L, 0); -} - -static int setyhook (lua_State *L) { - if (lua_isnoneornil(L, 1)) - lua_sethook(L, NULL, 0, 0); /* turn off hooks */ - else { - const char *smask = luaL_checkstring(L, 1); - int count = luaL_optint(L, 2, 0); - int mask = 0; - if (strchr(smask, 'l')) mask |= LUA_MASKLINE; - if (count > 0) mask |= LUA_MASKCOUNT; - lua_sethook(L, yieldf, mask, count); - } - return 0; -} - - -static int coresume (lua_State *L) { - int status; - lua_State *co = lua_tothread(L, 1); - luaL_argcheck(L, co, 1, "coroutine expected"); - status = lua_resume(co, 0); - if (status != 0) { - lua_pushboolean(L, 0); - lua_insert(L, -2); - return 2; /* return false + error message */ - } - else { - lua_pushboolean(L, 1); - return 1; - } -} - -/* }====================================================== */ - - - -static const struct luaL_reg tests_funcs[] = { - {"hash", hash_query}, - {"limits", get_limits}, - {"listcode", listcode}, - {"listk", listk}, - {"listlocals", listlocals}, - {"loadlib", loadlib}, - {"stacklevel", stacklevel}, - {"querystr", string_query}, - {"querytab", table_query}, - {"doit", test_do}, - {"testC", testC}, - {"ref", tref}, - {"getref", getref}, - {"unref", unref}, - {"d2s", d2s}, - {"s2d", s2d}, - {"metatable", metatable}, - {"upvalue", upvalue}, - {"newuserdata", newuserdata}, - {"pushuserdata", pushuserdata}, - {"udataval", udataval}, - {"doonnewstack", doonnewstack}, - {"newstate", newstate}, - {"closestate", closestate}, - {"doremote", doremote}, - {"log2", log2_aux}, - {"int2fb", int2fb_aux}, - {"totalmem", mem_query}, - {"resume", coresume}, - {"setyhook", setyhook}, - {NULL, NULL} -}; - - -static void fim (void) { - if (!islocked) - lua_close(lua_state); - lua_assert(memdebug_numblocks == 0); - lua_assert(memdebug_total == 0); -} - - -static int l_panic (lua_State *L) { - UNUSED(L); - fprintf(stderr, "unable to recover; exiting\n"); - return 0; -} - - -int luaB_opentests (lua_State *L) { - lua_atpanic(L, l_panic); - lua_userstateopen(L); /* init lock */ - lua_state = L; /* keep first state to be opened */ - luaL_openlib(L, "T", tests_funcs, 0); - atexit(fim); - return 0; -} - - -#undef main -int main (int argc, char *argv[]) { - char *limit = getenv("MEMLIMIT"); - if (limit) - memdebug_memlimit = strtoul(limit, NULL, 10); - l_main(argc, argv); - return 0; -} - -#endif +/*
+** $Id: ltests.c,v 1.3 2004-11-27 21:35:20 pixel Exp $
+** Internal Module for Debugging of the Lua Implementation
+** See Copyright Notice in lua.h
+*/
+
+
+#include <ctype.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define ltests_c
+
+#include "lua.h"
+
+#include "lapi.h"
+#include "lauxlib.h"
+#include "lcode.h"
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lmem.h"
+#include "lopcodes.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "lualib.h"
+
+
+
+/*
+** The whole module only makes sense with LUA_DEBUG on
+*/
+#ifdef LUA_DEBUG
+
+
+#define lua_pushintegral(L,i) lua_pushnumber(L, cast(lua_Number, (i)))
+
+
+static lua_State *lua_state = NULL;
+
+int islocked = 0;
+
+
+#define func_at(L,k) (L->ci->base+(k) - 1)
+
+
+static void setnameval (lua_State *L, const char *name, int val) {
+ lua_pushstring(L, name);
+ lua_pushintegral(L, val);
+ lua_settable(L, -3);
+}
+
+
+/*
+** {======================================================================
+** Controlled version for realloc.
+** =======================================================================
+*/
+
+#define MARK 0x55 /* 01010101 (a nice pattern) */
+
+#ifndef EXTERNMEMCHECK
+/* full memory check */
+#define HEADER (sizeof(L_Umaxalign)) /* ensures maximum alignment for HEADER */
+#define MARKSIZE 16 /* size of marks after each block */
+#define blockhead(b) (cast(char *, b) - HEADER)
+#define setsize(newblock, size) (*cast(size_t *, newblock) = size)
+#define checkblocksize(b, size) (size == (*cast(size_t *, blockhead(b))))
+#define fillmem(mem,size) memset(mem, -MARK, size)
+#else
+/* external memory check: don't do it twice */
+#define HEADER 0
+#define MARKSIZE 0
+#define blockhead(b) (b)
+#define setsize(newblock, size) /* empty */
+#define checkblocksize(b,size) (1)
+#define fillmem(mem,size) /* empty */
+#endif
+
+unsigned long memdebug_numblocks = 0;
+unsigned long memdebug_total = 0;
+unsigned long memdebug_maxmem = 0;
+unsigned long memdebug_memlimit = ULONG_MAX;
+
+
+static void *checkblock (void *block, size_t size) {
+ void *b = blockhead(block);
+ int i;
+ for (i=0;i<MARKSIZE;i++)
+ lua_assert(*(cast(char *, b)+HEADER+size+i) == MARK+i); /* corrupted block? */
+ return b;
+}
+
+
+static void freeblock (void *block, size_t size) {
+ if (block) {
+ lua_assert(checkblocksize(block, size));
+ block = checkblock(block, size);
+ fillmem(block, size+HEADER+MARKSIZE); /* erase block */
+ free(block); /* free original block */
+ memdebug_numblocks--;
+ memdebug_total -= size;
+ }
+}
+
+
+void *debug_realloc (void *block, size_t oldsize, size_t size) {
+ lua_assert(oldsize == 0 || checkblocksize(block, oldsize));
+ /* ISO does not specify what realloc(NULL, 0) does */
+ lua_assert(block != NULL || size > 0);
+ if (size == 0) {
+ freeblock(block, oldsize);
+ return NULL;
+ }
+ else if (size > oldsize && memdebug_total+size-oldsize > memdebug_memlimit)
+ return NULL; /* to test memory allocation errors */
+ else {
+ void *newblock;
+ int i;
+ size_t realsize = HEADER+size+MARKSIZE;
+ size_t commonsize = (oldsize < size) ? oldsize : size;
+ if (realsize < size) return NULL; /* overflow! */
+ newblock = malloc(realsize); /* alloc a new block */
+ if (newblock == NULL) return NULL;
+ if (block) {
+ memcpy(cast(char *, newblock)+HEADER, block, commonsize);
+ freeblock(block, oldsize); /* erase (and check) old copy */
+ }
+ /* initialize new part of the block with something `weird' */
+ fillmem(cast(char *, newblock)+HEADER+commonsize, size-commonsize);
+ memdebug_total += size;
+ if (memdebug_total > memdebug_maxmem)
+ memdebug_maxmem = memdebug_total;
+ memdebug_numblocks++;
+ setsize(newblock, size);
+ for (i=0;i<MARKSIZE;i++)
+ *(cast(char *, newblock)+HEADER+size+i) = cast(char, MARK+i);
+ return cast(char *, newblock)+HEADER;
+ }
+}
+
+
+/* }====================================================================== */
+
+
+
+/*
+** {======================================================
+** Disassembler
+** =======================================================
+*/
+
+
+static char *buildop (Proto *p, int pc, char *buff) {
+ Instruction i = p->code[pc];
+ OpCode o = GET_OPCODE(i);
+ const char *name = luaP_opnames[o];
+ int line = getline(p, pc);
+ sprintf(buff, "(%4d) %4d - ", line, pc);
+ switch (getOpMode(o)) {
+ case iABC:
+ sprintf(buff+strlen(buff), "%-12s%4d %4d %4d", name,
+ GETARG_A(i), GETARG_B(i), GETARG_C(i));
+ break;
+ case iABx:
+ sprintf(buff+strlen(buff), "%-12s%4d %4d", name, GETARG_A(i), GETARG_Bx(i));
+ break;
+ case iAsBx:
+ sprintf(buff+strlen(buff), "%-12s%4d %4d", name, GETARG_A(i), GETARG_sBx(i));
+ break;
+ }
+ return buff;
+}
+
+
+#if 0
+void luaI_printcode (Proto *pt, int size) {
+ int pc;
+ for (pc=0; pc<size; pc++) {
+ char buff[100];
+ printf("%s\n", buildop(pt, pc, buff));
+ }
+ printf("-------\n");
+}
+#endif
+
+
+static int listcode (lua_State *L) {
+ int pc;
+ Proto *p;
+ luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
+ 1, "Lua function expected");
+ p = clvalue(func_at(L, 1))->l.p;
+ lua_newtable(L);
+ setnameval(L, "maxstack", p->maxstacksize);
+ setnameval(L, "numparams", p->numparams);
+ for (pc=0; pc<p->sizecode; pc++) {
+ char buff[100];
+ lua_pushintegral(L, pc+1);
+ lua_pushstring(L, buildop(p, pc, buff));
+ lua_settable(L, -3);
+ }
+ return 1;
+}
+
+
+static int listk (lua_State *L) {
+ Proto *p;
+ int i;
+ luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
+ 1, "Lua function expected");
+ p = clvalue(func_at(L, 1))->l.p;
+ lua_newtable(L);
+ for (i=0; i<p->sizek; i++) {
+ lua_pushintegral(L, i+1);
+ luaA_pushobject(L, p->k+i);
+ lua_settable(L, -3);
+ }
+ return 1;
+}
+
+
+static int listlocals (lua_State *L) {
+ Proto *p;
+ int pc = luaL_checkint(L, 2) - 1;
+ int i = 0;
+ const char *name;
+ luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
+ 1, "Lua function expected");
+ p = clvalue(func_at(L, 1))->l.p;
+ while ((name = luaF_getlocalname(p, ++i, pc)) != NULL)
+ lua_pushstring(L, name);
+ return i-1;
+}
+
+/* }====================================================== */
+
+
+
+
+static int get_limits (lua_State *L) {
+ lua_newtable(L);
+ setnameval(L, "BITS_INT", BITS_INT);
+ setnameval(L, "LFPF", LFIELDS_PER_FLUSH);
+ setnameval(L, "MAXVARS", MAXVARS);
+ setnameval(L, "MAXPARAMS", MAXPARAMS);
+ setnameval(L, "MAXSTACK", MAXSTACK);
+ setnameval(L, "MAXUPVALUES", MAXUPVALUES);
+ return 1;
+}
+
+
+static int mem_query (lua_State *L) {
+ if (lua_isnone(L, 1)) {
+ lua_pushintegral(L, memdebug_total);
+ lua_pushintegral(L, memdebug_numblocks);
+ lua_pushintegral(L, memdebug_maxmem);
+ return 3;
+ }
+ else {
+ memdebug_memlimit = luaL_checkint(L, 1);
+ return 0;
+ }
+}
+
+
+static int hash_query (lua_State *L) {
+ if (lua_isnone(L, 2)) {
+ luaL_argcheck(L, lua_type(L, 1) == LUA_TSTRING, 1, "string expected");
+ lua_pushintegral(L, tsvalue(func_at(L, 1))->tsv.hash);
+ }
+ else {
+ TObject *o = func_at(L, 1);
+ Table *t;
+ luaL_checktype(L, 2, LUA_TTABLE);
+ t = hvalue(func_at(L, 2));
+ lua_pushintegral(L, luaH_mainposition(t, o) - t->node);
+ }
+ return 1;
+}
+
+
+static int stacklevel (lua_State *L) {
+ unsigned long a = 0;
+ lua_pushintegral(L, (int)(L->top - L->stack));
+ lua_pushintegral(L, (int)(L->stack_last - L->stack));
+ lua_pushintegral(L, (int)(L->ci - L->base_ci));
+ lua_pushintegral(L, (int)(L->end_ci - L->base_ci));
+ lua_pushintegral(L, (unsigned long)&a);
+ return 5;
+}
+
+
+static int table_query (lua_State *L) {
+ const Table *t;
+ int i = luaL_optint(L, 2, -1);
+ luaL_checktype(L, 1, LUA_TTABLE);
+ t = hvalue(func_at(L, 1));
+ if (i == -1) {
+ lua_pushintegral(L, t->sizearray);
+ lua_pushintegral(L, sizenode(t));
+ lua_pushintegral(L, t->firstfree - t->node);
+ }
+ else if (i < t->sizearray) {
+ lua_pushintegral(L, i);
+ luaA_pushobject(L, &t->array[i]);
+ lua_pushnil(L);
+ }
+ else if ((i -= t->sizearray) < sizenode(t)) {
+ if (!ttisnil(gval(gnode(t, i))) ||
+ ttisnil(gkey(gnode(t, i))) ||
+ ttisnumber(gkey(gnode(t, i)))) {
+ luaA_pushobject(L, gkey(gnode(t, i)));
+ }
+ else
+ lua_pushstring(L, "<undef>");
+ luaA_pushobject(L, gval(gnode(t, i)));
+ if (t->node[i].next)
+ lua_pushintegral(L, t->node[i].next - t->node);
+ else
+ lua_pushnil(L);
+ }
+ return 3;
+}
+
+
+static int string_query (lua_State *L) {
+ stringtable *tb = &G(L)->strt;
+ int s = luaL_optint(L, 2, 0) - 1;
+ if (s==-1) {
+ lua_pushintegral(L ,tb->nuse);
+ lua_pushintegral(L ,tb->size);
+ return 2;
+ }
+ else if (s < tb->size) {
+ GCObject *ts;
+ int n = 0;
+ for (ts = tb->hash[s]; ts; ts = ts->gch.next) {
+ setsvalue2s(L->top, gcotots(ts));
+ incr_top(L);
+ n++;
+ }
+ return n;
+ }
+ return 0;
+}
+
+
+static int tref (lua_State *L) {
+ int level = lua_gettop(L);
+ int lock = luaL_optint(L, 2, 1);
+ luaL_checkany(L, 1);
+ lua_pushvalue(L, 1);
+ lua_pushintegral(L, lua_ref(L, lock));
+ assert(lua_gettop(L) == level+1); /* +1 for result */
+ return 1;
+}
+
+static int getref (lua_State *L) {
+ int level = lua_gettop(L);
+ lua_getref(L, luaL_checkint(L, 1));
+ assert(lua_gettop(L) == level+1);
+ return 1;
+}
+
+static int unref (lua_State *L) {
+ int level = lua_gettop(L);
+ lua_unref(L, luaL_checkint(L, 1));
+ assert(lua_gettop(L) == level);
+ return 0;
+}
+
+static int metatable (lua_State *L) {
+ luaL_checkany(L, 1);
+ if (lua_isnone(L, 2)) {
+ if (lua_getmetatable(L, 1) == 0)
+ lua_pushnil(L);
+ }
+ else {
+ lua_settop(L, 2);
+ luaL_checktype(L, 2, LUA_TTABLE);
+ lua_setmetatable(L, 1);
+ }
+ return 1;
+}
+
+
+static int upvalue (lua_State *L) {
+ int n = luaL_checkint(L, 2);
+ luaL_checktype(L, 1, LUA_TFUNCTION);
+ if (lua_isnone(L, 3)) {
+ const char *name = lua_getupvalue(L, 1, n);
+ if (name == NULL) return 0;
+ lua_pushstring(L, name);
+ return 2;
+ }
+ else {
+ const char *name = lua_setupvalue(L, 1, n);
+ lua_pushstring(L, name);
+ return 1;
+ }
+}
+
+
+static int newuserdata (lua_State *L) {
+ size_t size = luaL_checkint(L, 1);
+ char *p = cast(char *, lua_newuserdata(L, size));
+ while (size--) *p++ = '\0';
+ return 1;
+}
+
+
+static int pushuserdata (lua_State *L) {
+ lua_pushlightuserdata(L, cast(void *, luaL_checkint(L, 1)));
+ return 1;
+}
+
+
+static int udataval (lua_State *L) {
+ lua_pushintegral(L, cast(int, lua_touserdata(L, 1)));
+ return 1;
+}
+
+
+static int doonnewstack (lua_State *L) {
+ lua_State *L1 = lua_newthread(L);
+ size_t l;
+ const char *s = luaL_checklstring(L, 1, &l);
+ int status = luaL_loadbuffer(L1, s, l, s);
+ if (status == 0)
+ status = lua_pcall(L1, 0, 0, 0);
+ lua_pushintegral(L, status);
+ return 1;
+}
+
+
+static int s2d (lua_State *L) {
+ lua_pushnumber(L, *cast(const double *, luaL_checkstring(L, 1)));
+ return 1;
+}
+
+static int d2s (lua_State *L) {
+ double d = luaL_checknumber(L, 1);
+ lua_pushlstring(L, cast(char *, &d), sizeof(d));
+ return 1;
+}
+
+
+static int newstate (lua_State *L) {
+ lua_State *L1 = lua_open();
+ if (L1) {
+ lua_userstateopen(L1); /* init lock */
+ lua_pushintegral(L, (unsigned long)L1);
+ }
+ else
+ lua_pushnil(L);
+ return 1;
+}
+
+
+static int loadlib (lua_State *L) {
+ static const luaL_reg libs[] = {
+ {"mathlibopen", luaopen_math},
+ {"strlibopen", luaopen_string},
+ {"iolibopen", luaopen_io},
+ {"tablibopen", luaopen_table},
+ {"dblibopen", luaopen_debug},
+ {"baselibopen", luaopen_base},
+ {NULL, NULL}
+ };
+ lua_State *L1 = cast(lua_State *,
+ cast(unsigned long, luaL_checknumber(L, 1)));
+ lua_pushvalue(L1, LUA_GLOBALSINDEX);
+ luaL_openlib(L1, NULL, libs, 0);
+ return 0;
+}
+
+static int closestate (lua_State *L) {
+ lua_State *L1 = cast(lua_State *, cast(unsigned long, luaL_checknumber(L, 1)));
+ lua_close(L1);
+ lua_unlock(L); /* close cannot unlock that */
+ return 0;
+}
+
+static int doremote (lua_State *L) {
+ lua_State *L1 = cast(lua_State *,cast(unsigned long,luaL_checknumber(L, 1)));
+ size_t lcode;
+ const char *code = luaL_checklstring(L, 2, &lcode);
+ int status;
+ lua_settop(L1, 0);
+ status = luaL_loadbuffer(L1, code, lcode, code);
+ if (status == 0)
+ status = lua_pcall(L1, 0, LUA_MULTRET, 0);
+ if (status != 0) {
+ lua_pushnil(L);
+ lua_pushintegral(L, status);
+ lua_pushstring(L, lua_tostring(L1, -1));
+ return 3;
+ }
+ else {
+ int i = 0;
+ while (!lua_isnone(L1, ++i))
+ lua_pushstring(L, lua_tostring(L1, i));
+ lua_pop(L1, i-1);
+ return i-1;
+ }
+}
+
+
+static int log2_aux (lua_State *L) {
+ lua_pushintegral(L, luaO_log2(luaL_checkint(L, 1)));
+ return 1;
+}
+
+static int int2fb_aux (lua_State *L) {
+ int b = luaO_int2fb(luaL_checkint(L, 1));
+ lua_pushintegral(L, b);
+ lua_pushintegral(L, fb2int(b));
+ return 2;
+}
+
+
+static int test_do (lua_State *L) {
+ const char *p = luaL_checkstring(L, 1);
+ if (*p == '@')
+ lua_dofile(L, p+1);
+ else
+ lua_dostring(L, p);
+ return lua_gettop(L);
+}
+
+
+
+/*
+** {======================================================
+** function to test the API with C. It interprets a kind of assembler
+** language with calls to the API, so the test can be driven by Lua code
+** =======================================================
+*/
+
+static const char *const delimits = " \t\n,;";
+
+static void skip (const char **pc) {
+ while (**pc != '\0' && strchr(delimits, **pc)) (*pc)++;
+}
+
+static int getnum_aux (lua_State *L, const char **pc) {
+ int res = 0;
+ int sig = 1;
+ skip(pc);
+ if (**pc == '.') {
+ res = cast(int, lua_tonumber(L, -1));
+ lua_pop(L, 1);
+ (*pc)++;
+ return res;
+ }
+ else if (**pc == '-') {
+ sig = -1;
+ (*pc)++;
+ }
+ while (isdigit(cast(int, **pc))) res = res*10 + (*(*pc)++) - '0';
+ return sig*res;
+}
+
+static const char *getname_aux (char *buff, const char **pc) {
+ int i = 0;
+ skip(pc);
+ while (**pc != '\0' && !strchr(delimits, **pc))
+ buff[i++] = *(*pc)++;
+ buff[i] = '\0';
+ return buff;
+}
+
+
+#define EQ(s1) (strcmp(s1, inst) == 0)
+
+#define getnum (getnum_aux(L, &pc))
+#define getname (getname_aux(buff, &pc))
+
+
+static int testC (lua_State *L) {
+ char buff[30];
+ const char *pc = luaL_checkstring(L, 1);
+ for (;;) {
+ const char *inst = getname;
+ if EQ("") return 0;
+ else if EQ("isnumber") {
+ lua_pushintegral(L, lua_isnumber(L, getnum));
+ }
+ else if EQ("isstring") {
+ lua_pushintegral(L, lua_isstring(L, getnum));
+ }
+ else if EQ("istable") {
+ lua_pushintegral(L, lua_istable(L, getnum));
+ }
+ else if EQ("iscfunction") {
+ lua_pushintegral(L, lua_iscfunction(L, getnum));
+ }
+ else if EQ("isfunction") {
+ lua_pushintegral(L, lua_isfunction(L, getnum));
+ }
+ else if EQ("isuserdata") {
+ lua_pushintegral(L, lua_isuserdata(L, getnum));
+ }
+ else if EQ("isudataval") {
+ lua_pushintegral(L, lua_islightuserdata(L, getnum));
+ }
+ else if EQ("isnil") {
+ lua_pushintegral(L, lua_isnil(L, getnum));
+ }
+ else if EQ("isnull") {
+ lua_pushintegral(L, lua_isnone(L, getnum));
+ }
+ else if EQ("tonumber") {
+ lua_pushnumber(L, lua_tonumber(L, getnum));
+ }
+ else if EQ("tostring") {
+ const char *s = lua_tostring(L, getnum);
+ lua_pushstring(L, s);
+ }
+ else if EQ("strlen") {
+ lua_pushintegral(L, lua_strlen(L, getnum));
+ }
+ else if EQ("tocfunction") {
+ lua_pushcfunction(L, lua_tocfunction(L, getnum));
+ }
+ else if EQ("return") {
+ return getnum;
+ }
+ else if EQ("gettop") {
+ lua_pushintegral(L, lua_gettop(L));
+ }
+ else if EQ("settop") {
+ lua_settop(L, getnum);
+ }
+ else if EQ("pop") {
+ lua_pop(L, getnum);
+ }
+ else if EQ("pushnum") {
+ lua_pushintegral(L, getnum);
+ }
+ else if EQ("pushnil") {
+ lua_pushnil(L);
+ }
+ else if EQ("pushbool") {
+ lua_pushboolean(L, getnum);
+ }
+ else if EQ("tobool") {
+ lua_pushintegral(L, lua_toboolean(L, getnum));
+ }
+ else if EQ("pushvalue") {
+ lua_pushvalue(L, getnum);
+ }
+ else if EQ("pushcclosure") {
+ lua_pushcclosure(L, testC, getnum);
+ }
+ else if EQ("pushupvalues") {
+ lua_pushupvalues(L);
+ }
+ else if EQ("remove") {
+ lua_remove(L, getnum);
+ }
+ else if EQ("insert") {
+ lua_insert(L, getnum);
+ }
+ else if EQ("replace") {
+ lua_replace(L, getnum);
+ }
+ else if EQ("gettable") {
+ lua_gettable(L, getnum);
+ }
+ else if EQ("settable") {
+ lua_settable(L, getnum);
+ }
+ else if EQ("next") {
+ lua_next(L, -2);
+ }
+ else if EQ("concat") {
+ lua_concat(L, getnum);
+ }
+ else if EQ("lessthan") {
+ int a = getnum;
+ lua_pushboolean(L, lua_lessthan(L, a, getnum));
+ }
+ else if EQ("equal") {
+ int a = getnum;
+ lua_pushboolean(L, lua_equal(L, a, getnum));
+ }
+ else if EQ("rawcall") {
+ int narg = getnum;
+ int nres = getnum;
+ lua_call(L, narg, nres);
+ }
+ else if EQ("call") {
+ int narg = getnum;
+ int nres = getnum;
+ lua_pcall(L, narg, nres, 0);
+ }
+ else if EQ("loadstring") {
+ size_t sl;
+ const char *s = luaL_checklstring(L, getnum, &sl);
+ luaL_loadbuffer(L, s, sl, s);
+ }
+ else if EQ("loadfile") {
+ luaL_loadfile(L, luaL_checkstring(L, getnum));
+ }
+ else if EQ("setmetatable") {
+ lua_setmetatable(L, getnum);
+ }
+ else if EQ("getmetatable") {
+ if (lua_getmetatable(L, getnum) == 0)
+ lua_pushnil(L);
+ }
+ else if EQ("type") {
+ lua_pushstring(L, lua_typename(L, lua_type(L, getnum)));
+ }
+ else if EQ("getn") {
+ int i = getnum;
+ lua_pushintegral(L, luaL_getn(L, i));
+ }
+ else if EQ("setn") {
+ int i = getnum;
+ int n = cast(int, lua_tonumber(L, -1));
+ luaL_setn(L, i, n);
+ lua_pop(L, 1);
+ }
+ else luaL_error(L, "unknown instruction %s", buff);
+ }
+ return 0;
+}
+
+/* }====================================================== */
+
+
+/*
+** {======================================================
+** tests for yield inside hooks
+** =======================================================
+*/
+
+static void yieldf (lua_State *L, lua_Debug *ar) {
+ lua_yield(L, 0);
+}
+
+static int setyhook (lua_State *L) {
+ if (lua_isnoneornil(L, 1))
+ lua_sethook(L, NULL, 0, 0); /* turn off hooks */
+ else {
+ const char *smask = luaL_checkstring(L, 1);
+ int count = luaL_optint(L, 2, 0);
+ int mask = 0;
+ if (strchr(smask, 'l')) mask |= LUA_MASKLINE;
+ if (count > 0) mask |= LUA_MASKCOUNT;
+ lua_sethook(L, yieldf, mask, count);
+ }
+ return 0;
+}
+
+
+static int coresume (lua_State *L) {
+ int status;
+ lua_State *co = lua_tothread(L, 1);
+ luaL_argcheck(L, co, 1, "coroutine expected");
+ status = lua_resume(co, 0);
+ if (status != 0) {
+ lua_pushboolean(L, 0);
+ lua_insert(L, -2);
+ return 2; /* return false + error message */
+ }
+ else {
+ lua_pushboolean(L, 1);
+ return 1;
+ }
+}
+
+/* }====================================================== */
+
+
+
+static const struct luaL_reg tests_funcs[] = {
+ {"hash", hash_query},
+ {"limits", get_limits},
+ {"listcode", listcode},
+ {"listk", listk},
+ {"listlocals", listlocals},
+ {"loadlib", loadlib},
+ {"stacklevel", stacklevel},
+ {"querystr", string_query},
+ {"querytab", table_query},
+ {"doit", test_do},
+ {"testC", testC},
+ {"ref", tref},
+ {"getref", getref},
+ {"unref", unref},
+ {"d2s", d2s},
+ {"s2d", s2d},
+ {"metatable", metatable},
+ {"upvalue", upvalue},
+ {"newuserdata", newuserdata},
+ {"pushuserdata", pushuserdata},
+ {"udataval", udataval},
+ {"doonnewstack", doonnewstack},
+ {"newstate", newstate},
+ {"closestate", closestate},
+ {"doremote", doremote},
+ {"log2", log2_aux},
+ {"int2fb", int2fb_aux},
+ {"totalmem", mem_query},
+ {"resume", coresume},
+ {"setyhook", setyhook},
+ {NULL, NULL}
+};
+
+
+static void fim (void) {
+ if (!islocked)
+ lua_close(lua_state);
+ lua_assert(memdebug_numblocks == 0);
+ lua_assert(memdebug_total == 0);
+}
+
+
+static int l_panic (lua_State *L) {
+ UNUSED(L);
+ fprintf(stderr, "unable to recover; exiting\n");
+ return 0;
+}
+
+
+int luaB_opentests (lua_State *L) {
+ lua_atpanic(L, l_panic);
+ lua_userstateopen(L); /* init lock */
+ lua_state = L; /* keep first state to be opened */
+ luaL_openlib(L, "T", tests_funcs, 0);
+ atexit(fim);
+ return 0;
+}
+
+
+#undef main
+int main (int argc, char *argv[]) {
+ char *limit = getenv("MEMLIMIT");
+ if (limit)
+ memdebug_memlimit = strtoul(limit, NULL, 10);
+ l_main(argc, argv);
+ return 0;
+}
+
+#endif
diff --git a/lib/lua/src/ltm.c b/lib/lua/src/ltm.c index 9ffe7b2..204bf46 100644 --- a/lib/lua/src/ltm.c +++ b/lib/lua/src/ltm.c @@ -1,70 +1,70 @@ -/* -** $Id: ltm.c,v 1.2 2003-12-11 16:53:30 pixel Exp $ -** Tag methods -** See Copyright Notice in lua.h -*/ - - -#include <string.h> - -#define ltm_c - -#include "lua.h" - -#include "lobject.h" -#include "lstate.h" -#include "lstring.h" -#include "ltable.h" -#include "ltm.h" - - - -const char *const luaT_typenames[] = { - "nil", "boolean", "userdata", "number", - "string", "table", "function", "userdata", "thread" -}; - - -void luaT_init (lua_State *L) { - static const char *const luaT_eventname[] = { /* ORDER TM */ - "__index", "__newindex", - "__gc", "__mode", "__eq", - "__add", "__sub", "__mul", "__div", - "__pow", "__unm", "__lt", "__le", - "__concat", "__call" - }; - int i; - for (i=0; i<TM_N; i++) { - G(L)->tmname[i] = luaS_new(L, luaT_eventname[i]); - luaS_fix(G(L)->tmname[i]); /* never collect these names */ - } -} - - -/* -** function to be used with macro "fasttm": optimized for absence of -** tag methods -*/ -const TObject *luaT_gettm (Table *events, TMS event, TString *ename) { - const TObject *tm = luaH_getstr(events, ename); - lua_assert(event <= TM_EQ); - if (ttisnil(tm)) { /* no tag method? */ - events->flags |= cast(lu_byte, 1u<<event); /* cache this fact */ - return NULL; - } - else return tm; -} - - -const TObject *luaT_gettmbyobj (lua_State *L, const TObject *o, TMS event) { - TString *ename = G(L)->tmname[event]; - switch (ttype(o)) { - case LUA_TTABLE: - return luaH_getstr(hvalue(o)->metatable, ename); - case LUA_TUSERDATA: - return luaH_getstr(uvalue(o)->uv.metatable, ename); - default: - return &luaO_nilobject; - } -} - +/*
+** $Id: ltm.c,v 1.3 2004-11-27 21:35:20 pixel Exp $
+** Tag methods
+** See Copyright Notice in lua.h
+*/
+
+
+#include <string.h>
+
+#define ltm_c
+
+#include "lua.h"
+
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+
+
+
+const char *const luaT_typenames[] = {
+ "nil", "boolean", "userdata", "number",
+ "string", "table", "function", "userdata", "thread"
+};
+
+
+void luaT_init (lua_State *L) {
+ static const char *const luaT_eventname[] = { /* ORDER TM */
+ "__index", "__newindex",
+ "__gc", "__mode", "__eq",
+ "__add", "__sub", "__mul", "__div",
+ "__pow", "__unm", "__lt", "__le",
+ "__concat", "__call"
+ };
+ int i;
+ for (i=0; i<TM_N; i++) {
+ G(L)->tmname[i] = luaS_new(L, luaT_eventname[i]);
+ luaS_fix(G(L)->tmname[i]); /* never collect these names */
+ }
+}
+
+
+/*
+** function to be used with macro "fasttm": optimized for absence of
+** tag methods
+*/
+const TObject *luaT_gettm (Table *events, TMS event, TString *ename) {
+ const TObject *tm = luaH_getstr(events, ename);
+ lua_assert(event <= TM_EQ);
+ if (ttisnil(tm)) { /* no tag method? */
+ events->flags |= cast(lu_byte, 1u<<event); /* cache this fact */
+ return NULL;
+ }
+ else return tm;
+}
+
+
+const TObject *luaT_gettmbyobj (lua_State *L, const TObject *o, TMS event) {
+ TString *ename = G(L)->tmname[event];
+ switch (ttype(o)) {
+ case LUA_TTABLE:
+ return luaH_getstr(hvalue(o)->metatable, ename);
+ case LUA_TUSERDATA:
+ return luaH_getstr(uvalue(o)->uv.metatable, ename);
+ default:
+ return &luaO_nilobject;
+ }
+}
+
diff --git a/lib/lua/src/luacomp.c b/lib/lua/src/luacomp.c index a2d5036..bac561b 100644 --- a/lib/lua/src/luacomp.c +++ b/lib/lua/src/luacomp.c @@ -1,82 +1,82 @@ -/* - ** $Id: luacomp.c,v 1.4 2004-04-27 11:23:30 pixel Exp $ - ** Lua compiler (saves bytecodes to files; also list bytecodes) - ** Highly hacked by Nicolas "Pixel" Noble to be transformed into a - ** small form-factor LUA compiler. - ** See Copyright Notice in lua.h - */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include "lua.h" -#include "lauxlib.h" - -#include "lfunc.h" -#include "lmem.h" -#include "lobject.h" -#include "lopcodes.h" -#include "lstring.h" -#include "lundump.h" - -#ifndef PROGNAME -#define PROGNAME "luacomp" /* program name */ -#endif - -const char * progname = PROGNAME; /* actual program name */ - -static Proto * toproto(lua_State * L, int i) { - const Closure * c = (const Closure *) lua_topointer(L, i); - - return c->l.p; -} - -static Proto * combine(lua_State * L, int n) { - if (n == 1) - return toproto(L, -1); - else { - int i, pc = 0; - Proto * f = luaF_newproto(L); - - f->source = luaS_newliteral(L, "=(" PROGNAME ")"); - f->maxstacksize = 1; - f->p = luaM_newvector(L, n, Proto *); - f->sizep = n; - f->sizecode = 2 * n + 1; - f->code = luaM_newvector(L, f->sizecode, Instruction); - for (i = 0; i < n; i++) { - f->p[i] = toproto(L, i - n); - f->code[pc++] = CREATE_ABx(OP_CLOSURE, 0, i); - f->code[pc++] = CREATE_ABC(OP_CALL, 0, 1, 1); - } - f->code[pc++] = CREATE_ABC(OP_RETURN, 0, 1, 0); - return f; - } -} - -static void strip(lua_State * L, Proto * f) { - int i, n = f->sizep; - luaM_freearray(L, f->lineinfo, f->sizelineinfo, int); - luaM_freearray(L, f->locvars, f->sizelocvars, struct LocVar); - - luaM_freearray(L, f->upvalues, f->sizeupvalues, TString *); - f->lineinfo = NULL; - f->sizelineinfo = 0; - f->locvars = NULL; - f->sizelocvars = 0; - f->upvalues = NULL; - f->sizeupvalues = 0; - f->source = luaS_newliteral(L, "=(none)"); - for (i = 0; i < n; i++) - strip(L, f->p[i]); -} - -void luacmain(lua_State * L, int stripping, lua_Chunkwriter w, void *uD) { - Proto * f; - - f = combine(L, lua_gettop(L)); - if (stripping) - strip(L, f); - luaU_dump(L, f, w, uD); -} +/*
+ ** $Id: luacomp.c,v 1.5 2004-11-27 21:35:20 pixel Exp $
+ ** Lua compiler (saves bytecodes to files; also list bytecodes)
+ ** Highly hacked by Nicolas "Pixel" Noble to be transformed into a
+ ** small form-factor LUA compiler.
+ ** See Copyright Notice in lua.h
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lua.h"
+#include "lauxlib.h"
+
+#include "lfunc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lstring.h"
+#include "lundump.h"
+
+#ifndef PROGNAME
+#define PROGNAME "luacomp" /* program name */
+#endif
+
+const char * progname = PROGNAME; /* actual program name */
+
+static Proto * toproto(lua_State * L, int i) {
+ const Closure * c = (const Closure *) lua_topointer(L, i);
+
+ return c->l.p;
+}
+
+static Proto * combine(lua_State * L, int n) {
+ if (n == 1)
+ return toproto(L, -1);
+ else {
+ int i, pc = 0;
+ Proto * f = luaF_newproto(L);
+
+ f->source = luaS_newliteral(L, "=(" PROGNAME ")");
+ f->maxstacksize = 1;
+ f->p = luaM_newvector(L, n, Proto *);
+ f->sizep = n;
+ f->sizecode = 2 * n + 1;
+ f->code = luaM_newvector(L, f->sizecode, Instruction);
+ for (i = 0; i < n; i++) {
+ f->p[i] = toproto(L, i - n);
+ f->code[pc++] = CREATE_ABx(OP_CLOSURE, 0, i);
+ f->code[pc++] = CREATE_ABC(OP_CALL, 0, 1, 1);
+ }
+ f->code[pc++] = CREATE_ABC(OP_RETURN, 0, 1, 0);
+ return f;
+ }
+}
+
+static void strip(lua_State * L, Proto * f) {
+ int i, n = f->sizep;
+ luaM_freearray(L, f->lineinfo, f->sizelineinfo, int);
+ luaM_freearray(L, f->locvars, f->sizelocvars, struct LocVar);
+
+ luaM_freearray(L, f->upvalues, f->sizeupvalues, TString *);
+ f->lineinfo = NULL;
+ f->sizelineinfo = 0;
+ f->locvars = NULL;
+ f->sizelocvars = 0;
+ f->upvalues = NULL;
+ f->sizeupvalues = 0;
+ f->source = luaS_newliteral(L, "=(none)");
+ for (i = 0; i < n; i++)
+ strip(L, f->p[i]);
+}
+
+void luacmain(lua_State * L, int stripping, lua_Chunkwriter w, void *uD) {
+ Proto * f;
+
+ f = combine(L, lua_gettop(L));
+ if (stripping)
+ strip(L, f);
+ luaU_dump(L, f, w, uD);
+}
diff --git a/lib/lua/src/lundump.c b/lib/lua/src/lundump.c index 3c87987..be2b586 100644 --- a/lib/lua/src/lundump.c +++ b/lib/lua/src/lundump.c @@ -1,286 +1,286 @@ -/* -** $Id: lundump.c,v 1.2 2003-12-11 16:53:30 pixel Exp $ -** load pre-compiled Lua chunks -** See Copyright Notice in lua.h -*/ - -#define lundump_c - -#include "lua.h" - -#include "ldebug.h" -#include "lfunc.h" -#include "lmem.h" -#include "lopcodes.h" -#include "lstring.h" -#include "lundump.h" -#include "lzio.h" - -#define LoadByte (lu_byte) ezgetc - -typedef struct { - lua_State* L; - ZIO* Z; - Mbuffer* b; - int swap; - const char* name; -} LoadState; - -static void unexpectedEOZ (LoadState* S) -{ - luaG_runerror(S->L,"unexpected end of file in %s",S->name); -} - -static int ezgetc (LoadState* S) -{ - int c=zgetc(S->Z); - if (c==EOZ) unexpectedEOZ(S); - return c; -} - -static void ezread (LoadState* S, void* b, int n) -{ - int r=luaZ_read(S->Z,b,n); - if (r!=0) unexpectedEOZ(S); -} - -static void LoadBlock (LoadState* S, void* b, size_t size) -{ - if (S->swap) - { - char* p=(char*) b+size-1; - int n=size; - while (n--) *p--=(char)ezgetc(S); - } - else - ezread(S,b,size); -} - -static void LoadVector (LoadState* S, void* b, int m, size_t size) -{ - if (S->swap) - { - char* q=(char*) b; - while (m--) - { - char* p=q+size-1; - int n=size; - while (n--) *p--=(char)ezgetc(S); - q+=size; - } - } - else - ezread(S,b,m*size); -} - -static int LoadInt (LoadState* S) -{ - int x; - LoadBlock(S,&x,sizeof(x)); - if (x<0) luaG_runerror(S->L,"bad integer in %s",S->name); - return x; -} - -static size_t LoadSize (LoadState* S) -{ - size_t x; - LoadBlock(S,&x,sizeof(x)); - return x; -} - -static lua_Number LoadNumber (LoadState* S) -{ - lua_Number x; - LoadBlock(S,&x,sizeof(x)); - return x; -} - -static TString* LoadString (LoadState* S) -{ - size_t size=LoadSize(S); - if (size==0) - return NULL; - else - { - char* s=luaZ_openspace(S->L,S->b,size); - ezread(S,s,size); - return luaS_newlstr(S->L,s,size-1); /* remove trailing '\0' */ - } -} - -static void LoadCode (LoadState* S, Proto* f) -{ - int size=LoadInt(S); - f->code=luaM_newvector(S->L,size,Instruction); - f->sizecode=size; - LoadVector(S,f->code,size,sizeof(*f->code)); -} - -static void LoadLocals (LoadState* S, Proto* f) -{ - int i,n; - n=LoadInt(S); - f->locvars=luaM_newvector(S->L,n,LocVar); - f->sizelocvars=n; - for (i=0; i<n; i++) - { - f->locvars[i].varname=LoadString(S); - f->locvars[i].startpc=LoadInt(S); - f->locvars[i].endpc=LoadInt(S); - } -} - -static void LoadLines (LoadState* S, Proto* f) -{ - int size=LoadInt(S); - f->lineinfo=luaM_newvector(S->L,size,int); - f->sizelineinfo=size; - LoadVector(S,f->lineinfo,size,sizeof(*f->lineinfo)); -} - -static void LoadUpvalues (LoadState* S, Proto* f) -{ - int i,n; - n=LoadInt(S); - if (n!=0 && n!=f->nups) - luaG_runerror(S->L,"bad nupvalues in %s: read %d; expected %d", - S->name,n,f->nups); - f->upvalues=luaM_newvector(S->L,n,TString*); - f->sizeupvalues=n; - for (i=0; i<n; i++) f->upvalues[i]=LoadString(S); -} - -static Proto* LoadFunction (LoadState* S, TString* p); - -static void LoadConstants (LoadState* S, Proto* f) -{ - int i,n; - n=LoadInt(S); - f->k=luaM_newvector(S->L,n,TObject); - f->sizek=n; - for (i=0; i<n; i++) - { - TObject* o=&f->k[i]; - int t=LoadByte(S); - switch (t) - { - case LUA_TNUMBER: - setnvalue(o,LoadNumber(S)); - break; - case LUA_TSTRING: - setsvalue2n(o,LoadString(S)); - break; - case LUA_TNIL: - setnilvalue(o); - break; - default: - luaG_runerror(S->L,"bad constant type (%d) in %s",t,S->name); - break; - } - } - n=LoadInt(S); - f->p=luaM_newvector(S->L,n,Proto*); - f->sizep=n; - for (i=0; i<n; i++) f->p[i]=LoadFunction(S,f->source); -} - -static Proto* LoadFunction (LoadState* S, TString* p) -{ - Proto* f=luaF_newproto(S->L); - f->source=LoadString(S); if (f->source==NULL) f->source=p; - f->lineDefined=LoadInt(S); - f->nups=LoadByte(S); - f->numparams=LoadByte(S); - f->is_vararg=LoadByte(S); - f->maxstacksize=LoadByte(S); - LoadLines(S,f); - LoadLocals(S,f); - LoadUpvalues(S,f); - LoadConstants(S,f); - LoadCode(S,f); -#ifndef TRUST_BINARIES - if (!luaG_checkcode(f)) luaG_runerror(S->L,"bad code in %s",S->name); -#endif - return f; -} - -static void LoadSignature (LoadState* S) -{ - const char* s=LUA_SIGNATURE; - while (*s!=0 && ezgetc(S)==*s) - ++s; - if (*s!=0) luaG_runerror(S->L,"bad signature in %s",S->name); -} - -static void TestSize (LoadState* S, int s, const char* what) -{ - int r=LoadByte(S); - if (r!=s) - luaG_runerror(S->L,"virtual machine mismatch in %s: " - "size of %s is %d but read %d",S->name,what,s,r); -} - -#define TESTSIZE(s,w) TestSize(S,s,w) -#define V(v) v/16,v%16 - -static void LoadHeader (LoadState* S) -{ - int version; - lua_Number x,tx=TEST_NUMBER; - LoadSignature(S); - version=LoadByte(S); - if (version>VERSION) - luaG_runerror(S->L,"%s too new: " - "read version %d.%d; expected at most %d.%d", - S->name,V(version),V(VERSION)); - if (version<VERSION0) /* check last major change */ - luaG_runerror(S->L,"%s too old: " - "read version %d.%d; expected at least %d.%d", - S->name,V(version),V(VERSION0)); - S->swap=(luaU_endianness()!=LoadByte(S)); /* need to swap bytes? */ - TESTSIZE(sizeof(int),"int"); - TESTSIZE(sizeof(size_t), "size_t"); - TESTSIZE(sizeof(Instruction), "Instruction"); - TESTSIZE(SIZE_OP, "OP"); - TESTSIZE(SIZE_A, "A"); - TESTSIZE(SIZE_B, "B"); - TESTSIZE(SIZE_C, "C"); - TESTSIZE(sizeof(lua_Number), "number"); - x=LoadNumber(S); - if ((long)x!=(long)tx) /* disregard errors in last bits of fraction */ - luaG_runerror(S->L,"unknown number format in %s",S->name); -} - -static Proto* LoadChunk (LoadState* S) -{ - LoadHeader(S); - return LoadFunction(S,NULL); -} - -/* -** load precompiled chunk -*/ -Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff) -{ - LoadState S; - const char* s=zname(Z); - if (*s=='@' || *s=='=') - S.name=s+1; - else if (*s==LUA_SIGNATURE[0]) - S.name="binary string"; - else - S.name=s; - S.L=L; - S.Z=Z; - S.b=buff; - return LoadChunk(&S); -} - -/* -** find byte order -*/ -int luaU_endianness (void) -{ - int x=1; - return *(char*)&x; -} +/*
+** $Id: lundump.c,v 1.3 2004-11-27 21:35:20 pixel Exp $
+** load pre-compiled Lua chunks
+** See Copyright Notice in lua.h
+*/
+
+#define lundump_c
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "lfunc.h"
+#include "lmem.h"
+#include "lopcodes.h"
+#include "lstring.h"
+#include "lundump.h"
+#include "lzio.h"
+
+#define LoadByte (lu_byte) ezgetc
+
+typedef struct {
+ lua_State* L;
+ ZIO* Z;
+ Mbuffer* b;
+ int swap;
+ const char* name;
+} LoadState;
+
+static void unexpectedEOZ (LoadState* S)
+{
+ luaG_runerror(S->L,"unexpected end of file in %s",S->name);
+}
+
+static int ezgetc (LoadState* S)
+{
+ int c=zgetc(S->Z);
+ if (c==EOZ) unexpectedEOZ(S);
+ return c;
+}
+
+static void ezread (LoadState* S, void* b, int n)
+{
+ int r=luaZ_read(S->Z,b,n);
+ if (r!=0) unexpectedEOZ(S);
+}
+
+static void LoadBlock (LoadState* S, void* b, size_t size)
+{
+ if (S->swap)
+ {
+ char* p=(char*) b+size-1;
+ int n=size;
+ while (n--) *p--=(char)ezgetc(S);
+ }
+ else
+ ezread(S,b,size);
+}
+
+static void LoadVector (LoadState* S, void* b, int m, size_t size)
+{
+ if (S->swap)
+ {
+ char* q=(char*) b;
+ while (m--)
+ {
+ char* p=q+size-1;
+ int n=size;
+ while (n--) *p--=(char)ezgetc(S);
+ q+=size;
+ }
+ }
+ else
+ ezread(S,b,m*size);
+}
+
+static int LoadInt (LoadState* S)
+{
+ int x;
+ LoadBlock(S,&x,sizeof(x));
+ if (x<0) luaG_runerror(S->L,"bad integer in %s",S->name);
+ return x;
+}
+
+static size_t LoadSize (LoadState* S)
+{
+ size_t x;
+ LoadBlock(S,&x,sizeof(x));
+ return x;
+}
+
+static lua_Number LoadNumber (LoadState* S)
+{
+ lua_Number x;
+ LoadBlock(S,&x,sizeof(x));
+ return x;
+}
+
+static TString* LoadString (LoadState* S)
+{
+ size_t size=LoadSize(S);
+ if (size==0)
+ return NULL;
+ else
+ {
+ char* s=luaZ_openspace(S->L,S->b,size);
+ ezread(S,s,size);
+ return luaS_newlstr(S->L,s,size-1); /* remove trailing '\0' */
+ }
+}
+
+static void LoadCode (LoadState* S, Proto* f)
+{
+ int size=LoadInt(S);
+ f->code=luaM_newvector(S->L,size,Instruction);
+ f->sizecode=size;
+ LoadVector(S,f->code,size,sizeof(*f->code));
+}
+
+static void LoadLocals (LoadState* S, Proto* f)
+{
+ int i,n;
+ n=LoadInt(S);
+ f->locvars=luaM_newvector(S->L,n,LocVar);
+ f->sizelocvars=n;
+ for (i=0; i<n; i++)
+ {
+ f->locvars[i].varname=LoadString(S);
+ f->locvars[i].startpc=LoadInt(S);
+ f->locvars[i].endpc=LoadInt(S);
+ }
+}
+
+static void LoadLines (LoadState* S, Proto* f)
+{
+ int size=LoadInt(S);
+ f->lineinfo=luaM_newvector(S->L,size,int);
+ f->sizelineinfo=size;
+ LoadVector(S,f->lineinfo,size,sizeof(*f->lineinfo));
+}
+
+static void LoadUpvalues (LoadState* S, Proto* f)
+{
+ int i,n;
+ n=LoadInt(S);
+ if (n!=0 && n!=f->nups)
+ luaG_runerror(S->L,"bad nupvalues in %s: read %d; expected %d",
+ S->name,n,f->nups);
+ f->upvalues=luaM_newvector(S->L,n,TString*);
+ f->sizeupvalues=n;
+ for (i=0; i<n; i++) f->upvalues[i]=LoadString(S);
+}
+
+static Proto* LoadFunction (LoadState* S, TString* p);
+
+static void LoadConstants (LoadState* S, Proto* f)
+{
+ int i,n;
+ n=LoadInt(S);
+ f->k=luaM_newvector(S->L,n,TObject);
+ f->sizek=n;
+ for (i=0; i<n; i++)
+ {
+ TObject* o=&f->k[i];
+ int t=LoadByte(S);
+ switch (t)
+ {
+ case LUA_TNUMBER:
+ setnvalue(o,LoadNumber(S));
+ break;
+ case LUA_TSTRING:
+ setsvalue2n(o,LoadString(S));
+ break;
+ case LUA_TNIL:
+ setnilvalue(o);
+ break;
+ default:
+ luaG_runerror(S->L,"bad constant type (%d) in %s",t,S->name);
+ break;
+ }
+ }
+ n=LoadInt(S);
+ f->p=luaM_newvector(S->L,n,Proto*);
+ f->sizep=n;
+ for (i=0; i<n; i++) f->p[i]=LoadFunction(S,f->source);
+}
+
+static Proto* LoadFunction (LoadState* S, TString* p)
+{
+ Proto* f=luaF_newproto(S->L);
+ f->source=LoadString(S); if (f->source==NULL) f->source=p;
+ f->lineDefined=LoadInt(S);
+ f->nups=LoadByte(S);
+ f->numparams=LoadByte(S);
+ f->is_vararg=LoadByte(S);
+ f->maxstacksize=LoadByte(S);
+ LoadLines(S,f);
+ LoadLocals(S,f);
+ LoadUpvalues(S,f);
+ LoadConstants(S,f);
+ LoadCode(S,f);
+#ifndef TRUST_BINARIES
+ if (!luaG_checkcode(f)) luaG_runerror(S->L,"bad code in %s",S->name);
+#endif
+ return f;
+}
+
+static void LoadSignature (LoadState* S)
+{
+ const char* s=LUA_SIGNATURE;
+ while (*s!=0 && ezgetc(S)==*s)
+ ++s;
+ if (*s!=0) luaG_runerror(S->L,"bad signature in %s",S->name);
+}
+
+static void TestSize (LoadState* S, int s, const char* what)
+{
+ int r=LoadByte(S);
+ if (r!=s)
+ luaG_runerror(S->L,"virtual machine mismatch in %s: "
+ "size of %s is %d but read %d",S->name,what,s,r);
+}
+
+#define TESTSIZE(s,w) TestSize(S,s,w)
+#define V(v) v/16,v%16
+
+static void LoadHeader (LoadState* S)
+{
+ int version;
+ lua_Number x,tx=TEST_NUMBER;
+ LoadSignature(S);
+ version=LoadByte(S);
+ if (version>VERSION)
+ luaG_runerror(S->L,"%s too new: "
+ "read version %d.%d; expected at most %d.%d",
+ S->name,V(version),V(VERSION));
+ if (version<VERSION0) /* check last major change */
+ luaG_runerror(S->L,"%s too old: "
+ "read version %d.%d; expected at least %d.%d",
+ S->name,V(version),V(VERSION0));
+ S->swap=(luaU_endianness()!=LoadByte(S)); /* need to swap bytes? */
+ TESTSIZE(sizeof(int),"int");
+ TESTSIZE(sizeof(size_t), "size_t");
+ TESTSIZE(sizeof(Instruction), "Instruction");
+ TESTSIZE(SIZE_OP, "OP");
+ TESTSIZE(SIZE_A, "A");
+ TESTSIZE(SIZE_B, "B");
+ TESTSIZE(SIZE_C, "C");
+ TESTSIZE(sizeof(lua_Number), "number");
+ x=LoadNumber(S);
+ if ((long)x!=(long)tx) /* disregard errors in last bits of fraction */
+ luaG_runerror(S->L,"unknown number format in %s",S->name);
+}
+
+static Proto* LoadChunk (LoadState* S)
+{
+ LoadHeader(S);
+ return LoadFunction(S,NULL);
+}
+
+/*
+** load precompiled chunk
+*/
+Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff)
+{
+ LoadState S;
+ const char* s=zname(Z);
+ if (*s=='@' || *s=='=')
+ S.name=s+1;
+ else if (*s==LUA_SIGNATURE[0])
+ S.name="binary string";
+ else
+ S.name=s;
+ S.L=L;
+ S.Z=Z;
+ S.b=buff;
+ return LoadChunk(&S);
+}
+
+/*
+** find byte order
+*/
+int luaU_endianness (void)
+{
+ int x=1;
+ return *(char*)&x;
+}
diff --git a/lib/lua/src/lvm.c b/lib/lua/src/lvm.c index 3a8a974..c22c258 100644 --- a/lib/lua/src/lvm.c +++ b/lib/lua/src/lvm.c @@ -1,784 +1,784 @@ -/* -** $Id: lvm.c,v 1.3 2004-07-23 13:08:23 pixel Exp $ -** Lua virtual machine -** See Copyright Notice in lua.h -*/ - - -#include <stdarg.h> -#include <stdlib.h> -#include <string.h> - -/* needed only when `lua_number2str' uses `sprintf' */ -#include <stdio.h> - -#define lvm_c - -#include "lua.h" - -#include "ldebug.h" -#include "ldo.h" -#include "lfunc.h" -#include "lgc.h" -#include "lobject.h" -#include "lopcodes.h" -#include "lstate.h" -#include "lstring.h" -#include "ltable.h" -#include "ltm.h" -#include "lvm.h" - - - -/* function to convert a lua_Number to a string */ -#ifndef lua_number2str -#define lua_number2str(s,n) sprintf((s), LUA_NUMBER_FMT, (n)) -#endif - - -/* limit for table tag-method chains (to avoid loops) */ -#define MAXTAGLOOP 100 - - -const TObject *luaV_tonumber (const TObject *obj, TObject *n) { - lua_Number num; - if (ttisnumber(obj)) return obj; - if (ttisstring(obj) && luaO_str2d(svalue(obj), &num)) { - setnvalue(n, num); - return n; - } - else - return NULL; -} - - -int luaV_tostring (lua_State *L, StkId obj) { - if (!ttisnumber(obj)) - return 0; - else { - char s[32]; /* 16 digits, sign, point and \0 (+ some extra...) */ - lua_number2str(s, nvalue(obj)); - setsvalue2s(obj, luaS_new(L, s)); - return 1; - } -} - - -static void traceexec (lua_State *L) { - lu_byte mask = L->hookmask; - if (mask > LUA_MASKLINE) { /* instruction-hook set? */ - if (L->hookcount == 0) { - resethookcount(L); - luaD_callhook(L, LUA_HOOKCOUNT, -1); - return; - } - } - if (mask & LUA_MASKLINE) { - CallInfo *ci = L->ci; - Proto *p = ci_func(ci)->l.p; - int newline = getline(p, pcRel(*ci->u.l.pc, p)); - if (!L->hookinit) { - luaG_inithooks(L); - return; - } - lua_assert(ci->state & CI_HASFRAME); - if (pcRel(*ci->u.l.pc, p) == 0) /* tracing may be starting now? */ - ci->u.l.savedpc = *ci->u.l.pc; /* initialize `savedpc' */ - /* calls linehook when enters a new line or jumps back (loop) */ - if (*ci->u.l.pc <= ci->u.l.savedpc || - newline != getline(p, pcRel(ci->u.l.savedpc, p))) { - luaD_callhook(L, LUA_HOOKLINE, newline); - ci = L->ci; /* previous call may reallocate `ci' */ - } - ci->u.l.savedpc = *ci->u.l.pc; - } -} - - -static void callTMres (lua_State *L, const TObject *f, - const TObject *p1, const TObject *p2) { - setobj2s(L->top, f); /* push function */ - setobj2s(L->top+1, p1); /* 1st argument */ - setobj2s(L->top+2, p2); /* 2nd argument */ - luaD_checkstack(L, 3); /* cannot check before (could invalidate p1, p2) */ - L->top += 3; - luaD_call(L, L->top - 3, 1); - L->top--; /* result will be in L->top */ -} - - - -static void callTM (lua_State *L, const TObject *f, - const TObject *p1, const TObject *p2, const TObject *p3) { - setobj2s(L->top, f); /* push function */ - setobj2s(L->top+1, p1); /* 1st argument */ - setobj2s(L->top+2, p2); /* 2nd argument */ - setobj2s(L->top+3, p3); /* 3th argument */ - luaD_checkstack(L, 4); /* cannot check before (could invalidate p1...p3) */ - L->top += 4; - luaD_call(L, L->top - 4, 0); -} - - -static const TObject *luaV_index (lua_State *L, const TObject *t, - TObject *key, int loop) { - const TObject *tm = fasttm(L, hvalue(t)->metatable, TM_INDEX); - if (tm == NULL) return &luaO_nilobject; /* no TM */ - if (ttisfunction(tm)) { - callTMres(L, tm, t, key); - return L->top; - } - else return luaV_gettable(L, tm, key, loop); -} - -static const TObject *luaV_getnotable (lua_State *L, const TObject *t, - TObject *key, int loop) { - const TObject *tm = luaT_gettmbyobj(L, t, TM_INDEX); - if (ttisnil(tm)) - luaG_typeerror(L, t, "index"); - if (ttisfunction(tm)) { - callTMres(L, tm, t, key); - return L->top; - } - else return luaV_gettable(L, tm, key, loop); -} - - -/* -** Function to index a table. -** Receives the table at `t' and the key at `key'. -** leaves the result at `res'. -*/ -const TObject *luaV_gettable (lua_State *L, const TObject *t, TObject *key, - int loop) { - if (loop > MAXTAGLOOP) - luaG_runerror(L, "loop in gettable"); - if (ttistable(t)) { /* `t' is a table? */ - Table *h = hvalue(t); - const TObject *v = luaH_get(h, key); /* do a primitive get */ - if (!ttisnil(v)) return v; - else return luaV_index(L, t, key, loop+1); - } - else return luaV_getnotable(L, t, key, loop+1); -} - - -/* -** Receives table at `t', key at `key' and value at `val'. -*/ -void luaV_settable (lua_State *L, const TObject *t, TObject *key, StkId val) { - const TObject *tm; - int loop = 0; - do { - if (ttistable(t)) { /* `t' is a table? */ - Table *h = hvalue(t); - TObject *oldval = luaH_set(L, h, key); /* do a primitive set */ - if (!ttisnil(oldval) || /* result is no nil? */ - (tm = fasttm(L, h->metatable, TM_NEWINDEX)) == NULL) { /* or no TM? */ - setobj2t(oldval, val); /* write barrier */ - return; - } - /* else will try the tag method */ - } - else if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_NEWINDEX))) - luaG_typeerror(L, t, "index"); - if (ttisfunction(tm)) { - callTM(L, tm, t, key, val); - return; - } - t = tm; /* else repeat with `tm' */ - } while (++loop <= MAXTAGLOOP); - luaG_runerror(L, "loop in settable"); -} - - -static int call_binTM (lua_State *L, const TObject *p1, const TObject *p2, - StkId res, TMS event) { - ptrdiff_t result = savestack(L, res); - const TObject *tm = luaT_gettmbyobj(L, p1, event); /* try first operand */ - if (ttisnil(tm)) - tm = luaT_gettmbyobj(L, p2, event); /* try second operand */ - if (!ttisfunction(tm)) return 0; - callTMres(L, tm, p1, p2); - res = restorestack(L, result); /* previous call may change stack */ - setobjs2s(res, L->top); - return 1; -} - - -static const TObject *get_compTM (lua_State *L, Table *mt1, Table *mt2, - TMS event) { - const TObject *tm1 = fasttm(L, mt1, event); - const TObject *tm2; - if (tm1 == NULL) return NULL; /* no metamethod */ - if (mt1 == mt2) return tm1; /* same metatables => same metamethods */ - tm2 = fasttm(L, mt2, event); - if (tm2 == NULL) return NULL; /* no metamethod */ - if (luaO_rawequalObj(tm1, tm2)) /* same metamethods? */ - return tm1; - return NULL; -} - - -static int call_orderTM (lua_State *L, const TObject *p1, const TObject *p2, - TMS event) { - const TObject *tm1 = luaT_gettmbyobj(L, p1, event); - const TObject *tm2; - if (ttisnil(tm1)) return -1; /* no metamethod? */ - tm2 = luaT_gettmbyobj(L, p2, event); - if (!luaO_rawequalObj(tm1, tm2)) /* different metamethods? */ - return -1; - callTMres(L, tm1, p1, p2); - return !l_isfalse(L->top); -} - - -static int luaV_strcmp (const TString *ls, const TString *rs) { - const char *l = getstr(ls); - size_t ll = ls->tsv.len; - const char *r = getstr(rs); - size_t lr = rs->tsv.len; - for (;;) { - int temp = strcoll(l, r); - if (temp != 0) return temp; - else { /* strings are equal up to a `\0' */ - size_t len = strlen(l); /* index of first `\0' in both strings */ - if (len == lr) /* r is finished? */ - return (len == ll) ? 0 : 1; - else if (len == ll) /* l is finished? */ - return -1; /* l is smaller than r (because r is not finished) */ - /* both strings longer than `len'; go on comparing (after the `\0') */ - len++; - l += len; ll -= len; r += len; lr -= len; - } - } -} - - -int luaV_lessthan (lua_State *L, const TObject *l, const TObject *r) { - int res; - if (ttype(l) != ttype(r)) - return luaG_ordererror(L, l, r); - else if (ttisnumber(l)) - return nvalue(l) < nvalue(r); - else if (ttisstring(l)) - return luaV_strcmp(tsvalue(l), tsvalue(r)) < 0; - else if ((res = call_orderTM(L, l, r, TM_LT)) != -1) - return res; - return luaG_ordererror(L, l, r); -} - - -static int luaV_lessequal (lua_State *L, const TObject *l, const TObject *r) { - int res; - if (ttype(l) != ttype(r)) - return luaG_ordererror(L, l, r); - else if (ttisnumber(l)) - return nvalue(l) <= nvalue(r); - else if (ttisstring(l)) - return luaV_strcmp(tsvalue(l), tsvalue(r)) <= 0; - else if ((res = call_orderTM(L, l, r, TM_LE)) != -1) /* first try `le' */ - return res; - else if ((res = call_orderTM(L, r, l, TM_LT)) != -1) /* else try `lt' */ - return !res; - return luaG_ordererror(L, l, r); -} - - -int luaV_equalval (lua_State *L, const TObject *t1, const TObject *t2) { - const TObject *tm; - lua_assert(ttype(t1) == ttype(t2)); - switch (ttype(t1)) { - case LUA_TNIL: return 1; - case LUA_TNUMBER: return nvalue(t1) == nvalue(t2); - case LUA_TBOOLEAN: return bvalue(t1) == bvalue(t2); /* true must be 1 !! */ - case LUA_TLIGHTUSERDATA: return pvalue(t1) == pvalue(t2); - case LUA_TUSERDATA: { - if (uvalue(t1) == uvalue(t2)) return 1; - tm = get_compTM(L, uvalue(t1)->uv.metatable, uvalue(t2)->uv.metatable, - TM_EQ); - break; /* will try TM */ - } - case LUA_TTABLE: { - if (hvalue(t1) == hvalue(t2)) return 1; - tm = get_compTM(L, hvalue(t1)->metatable, hvalue(t2)->metatable, TM_EQ); - break; /* will try TM */ - } - default: return gcvalue(t1) == gcvalue(t2); - } - if (tm == NULL) return 0; /* no TM? */ - callTMres(L, tm, t1, t2); /* call TM */ - return !l_isfalse(L->top); -} - - -void luaV_concat (lua_State *L, int total, int last) { - do { - StkId top = L->base + last + 1; - int n = 2; /* number of elements handled in this pass (at least 2) */ - if (!tostring(L, top-2) || !tostring(L, top-1)) { - if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT)) - luaG_concaterror(L, top-2, top-1); - } else if (tsvalue(top-1)->tsv.len > 0) { /* if len=0, do nothing */ - /* at least two string values; get as many as possible */ - lu_mem tl = cast(lu_mem, tsvalue(top-1)->tsv.len) + - cast(lu_mem, tsvalue(top-2)->tsv.len); - char *buffer; - int i; - while (n < total && tostring(L, top-n-1)) { /* collect total length */ - tl += tsvalue(top-n-1)->tsv.len; - n++; - } - if (tl > MAX_SIZET) luaG_runerror(L, "string size overflow"); - buffer = luaZ_openspace(L, &G(L)->buff, tl); - tl = 0; - for (i=n; i>0; i--) { /* concat all strings */ - size_t l = tsvalue(top-i)->tsv.len; - memcpy(buffer+tl, svalue(top-i), l); - tl += l; - } - setsvalue2s(top-n, luaS_newlstr(L, buffer, tl)); - } - total -= n-1; /* got `n' strings to create 1 new */ - last -= n-1; - } while (total > 1); /* repeat until only 1 result left */ -} - - -static void Arith (lua_State *L, StkId ra, - const TObject *rb, const TObject *rc, TMS op) { - TObject tempb, tempc; - const TObject *b, *c; - if ((b = luaV_tonumber(rb, &tempb)) != NULL && - (c = luaV_tonumber(rc, &tempc)) != NULL) { - switch (op) { - case TM_ADD: setnvalue(ra, nvalue(b) + nvalue(c)); break; - case TM_SUB: setnvalue(ra, nvalue(b) - nvalue(c)); break; - case TM_MUL: setnvalue(ra, nvalue(b) * nvalue(c)); break; - case TM_DIV: setnvalue(ra, nvalue(b) / nvalue(c)); break; - case TM_POW: { - const TObject *f = luaH_getstr(hvalue(gt(L)), G(L)->tmname[TM_POW]); - ptrdiff_t res = savestack(L, ra); - if (!ttisfunction(f)) - luaG_runerror(L, "`__pow' (`^' operator) is not a function"); - callTMres(L, f, b, c); - ra = restorestack(L, res); /* previous call may change stack */ - setobjs2s(ra, L->top); - break; - } - default: lua_assert(0); break; - } - } - else if (!call_binTM(L, rb, rc, ra, op)) - luaG_aritherror(L, rb, rc); -} - - - -/* -** some macros for common tasks in `luaV_execute' -*/ - -#define runtime_check(L, c) { if (!(c)) return 0; } - -#define RA(i) (base+GETARG_A(i)) -/* to be used after possible stack reallocation */ -#define XRA(i) (L->base+GETARG_A(i)) -#define RB(i) (base+GETARG_B(i)) -#define RKB(i) ((GETARG_B(i) < MAXSTACK) ? RB(i) : k+GETARG_B(i)-MAXSTACK) -#define RC(i) (base+GETARG_C(i)) -#define RKC(i) ((GETARG_C(i) < MAXSTACK) ? RC(i) : k+GETARG_C(i)-MAXSTACK) -#define KBx(i) (k+GETARG_Bx(i)) - - -#define dojump(pc, i) ((pc) += (i)) - - -StkId luaV_execute (lua_State *L) { - LClosure *cl; - TObject *k; - const Instruction *pc; - callentry: /* entry point when calling new functions */ - L->ci->u.l.pc = &pc; - if (L->hookmask & LUA_MASKCALL) - luaD_callhook(L, LUA_HOOKCALL, -1); - retentry: /* entry point when returning to old functions */ - lua_assert(L->ci->state == CI_SAVEDPC || - L->ci->state == (CI_SAVEDPC | CI_CALLING)); - L->ci->state = CI_HASFRAME; /* activate frame */ - pc = L->ci->u.l.savedpc; - cl = &clvalue(L->base - 1)->l; - k = cl->p->k; - /* main loop of interpreter */ - for (;;) { - const Instruction i = *pc++; - StkId base, ra; - if ((L->hookmask & (LUA_MASKLINE | LUA_MASKCOUNT)) && - (--L->hookcount == 0 || L->hookmask & LUA_MASKLINE)) { - traceexec(L); - if (L->ci->state & CI_YIELD) { /* did hook yield? */ - L->ci->u.l.savedpc = pc - 1; - L->ci->state = CI_YIELD | CI_SAVEDPC; - return NULL; - } - if (L->ci->state & CI_BREAK) { /* did hook break? */ - luaG_runerror(L, "breaking"); - L->ci->state &= ~CI_BREAK; - } - } - /* warning!! several calls may realloc the stack and invalidate `ra' */ - base = L->base; - ra = RA(i); - lua_assert(L->ci->state & CI_HASFRAME); - lua_assert(base == L->ci->base); - lua_assert(L->top <= L->stack + L->stacksize && L->top >= base); - lua_assert(L->top == L->ci->top || - GET_OPCODE(i) == OP_CALL || GET_OPCODE(i) == OP_TAILCALL || - GET_OPCODE(i) == OP_RETURN || GET_OPCODE(i) == OP_SETLISTO); - switch (GET_OPCODE(i)) { - case OP_MOVE: { - setobjs2s(ra, RB(i)); - break; - } - case OP_LOADK: { - setobj2s(ra, KBx(i)); - break; - } - case OP_LOADBOOL: { - setbvalue(ra, GETARG_B(i)); - if (GETARG_C(i)) pc++; /* skip next instruction (if C) */ - break; - } - case OP_LOADNIL: { - TObject *rb = RB(i); - do { - setnilvalue(rb--); - } while (rb >= ra); - break; - } - case OP_GETUPVAL: { - int b = GETARG_B(i); - setobj2s(ra, cl->upvals[b]->v); - break; - } - case OP_GETGLOBAL: { - TObject *rb = KBx(i); - const TObject *v; - lua_assert(ttisstring(rb) && ttistable(&cl->g)); - v = luaH_getstr(hvalue(&cl->g), tsvalue(rb)); - if (!ttisnil(v)) { setobj2s(ra, v); } - else - setobj2s(XRA(i), luaV_index(L, &cl->g, rb, 0)); - break; - } - case OP_GETTABLE: { - StkId rb = RB(i); - TObject *rc = RKC(i); - if (ttistable(rb)) { - const TObject *v = luaH_get(hvalue(rb), rc); - if (!ttisnil(v)) { setobj2s(ra, v); } - else - setobj2s(XRA(i), luaV_index(L, rb, rc, 0)); - } - else - setobj2s(XRA(i), luaV_getnotable(L, rb, rc, 0)); - break; - } - case OP_SETGLOBAL: { - lua_assert(ttisstring(KBx(i)) && ttistable(&cl->g)); - luaV_settable(L, &cl->g, KBx(i), ra); - break; - } - case OP_SETUPVAL: { - int b = GETARG_B(i); - setobj(cl->upvals[b]->v, ra); /* write barrier */ - break; - } - case OP_SETTABLE: { - luaV_settable(L, ra, RKB(i), RKC(i)); - break; - } - case OP_NEWTABLE: { - int b = GETARG_B(i); - b = fb2int(b); - sethvalue(ra, luaH_new(L, b, GETARG_C(i))); - luaC_checkGC(L); - break; - } - case OP_SELF: { - StkId rb = RB(i); - TObject *rc = RKC(i); - runtime_check(L, ttisstring(rc)); - setobjs2s(ra+1, rb); - if (ttistable(rb)) { - const TObject *v = luaH_getstr(hvalue(rb), tsvalue(rc)); - if (!ttisnil(v)) { setobj2s(ra, v); } - else - setobj2s(XRA(i), luaV_index(L, rb, rc, 0)); - } - else - setobj2s(XRA(i), luaV_getnotable(L, rb, rc, 0)); - break; - } - case OP_ADD: { - TObject *rb = RKB(i); - TObject *rc = RKC(i); - if (ttisnumber(rb) && ttisnumber(rc)) { - setnvalue(ra, nvalue(rb) + nvalue(rc)); - } - else - Arith(L, ra, rb, rc, TM_ADD); - break; - } - case OP_SUB: { - TObject *rb = RKB(i); - TObject *rc = RKC(i); - if (ttisnumber(rb) && ttisnumber(rc)) { - setnvalue(ra, nvalue(rb) - nvalue(rc)); - } - else - Arith(L, ra, rb, rc, TM_SUB); - break; - } - case OP_MUL: { - TObject *rb = RKB(i); - TObject *rc = RKC(i); - if (ttisnumber(rb) && ttisnumber(rc)) { - setnvalue(ra, nvalue(rb) * nvalue(rc)); - } - else - Arith(L, ra, rb, rc, TM_MUL); - break; - } - case OP_DIV: { - TObject *rb = RKB(i); - TObject *rc = RKC(i); - if (ttisnumber(rb) && ttisnumber(rc)) { - setnvalue(ra, nvalue(rb) / nvalue(rc)); - } - else - Arith(L, ra, rb, rc, TM_DIV); - break; - } - case OP_POW: { - Arith(L, ra, RKB(i), RKC(i), TM_POW); - break; - } - case OP_UNM: { - const TObject *rb = RB(i); - TObject temp; - if (tonumber(rb, &temp)) { - setnvalue(ra, -nvalue(rb)); - } - else { - setnilvalue(&temp); - if (!call_binTM(L, RB(i), &temp, ra, TM_UNM)) - luaG_aritherror(L, RB(i), &temp); - } - break; - } - case OP_NOT: { - int res = l_isfalse(RB(i)); /* next assignment may change this value */ - setbvalue(ra, res); - break; - } - case OP_CONCAT: { - int b = GETARG_B(i); - int c = GETARG_C(i); - luaV_concat(L, c-b+1, c); /* may change `base' (and `ra') */ - base = L->base; - setobjs2s(RA(i), base+b); - luaC_checkGC(L); - break; - } - case OP_JMP: { - dojump(pc, GETARG_sBx(i)); - break; - } - case OP_EQ: { - if (equalobj(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++; - else dojump(pc, GETARG_sBx(*pc) + 1); - break; - } - case OP_LT: { - if (luaV_lessthan(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++; - else dojump(pc, GETARG_sBx(*pc) + 1); - break; - } - case OP_LE: { - if (luaV_lessequal(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++; - else dojump(pc, GETARG_sBx(*pc) + 1); - break; - } - case OP_TEST: { - TObject *rb = RB(i); - if (l_isfalse(rb) == GETARG_C(i)) pc++; - else { - setobjs2s(ra, rb); - dojump(pc, GETARG_sBx(*pc) + 1); - } - break; - } - case OP_CALL: - case OP_TAILCALL: { - StkId firstResult; - int b = GETARG_B(i); - int nresults; - if (b != 0) L->top = ra+b; /* else previous instruction set top */ - nresults = GETARG_C(i) - 1; - firstResult = luaD_precall(L, ra); - if (firstResult) { - if (firstResult > L->top) { /* yield? */ - lua_assert(L->ci->state == (CI_C | CI_YIELD)); - (L->ci - 1)->u.l.savedpc = pc; - (L->ci - 1)->state = CI_SAVEDPC; - return NULL; - } - /* it was a C function (`precall' called it); adjust results */ - luaD_poscall(L, nresults, firstResult); - if (nresults >= 0) L->top = L->ci->top; - } - else { /* it is a Lua function */ - if (GET_OPCODE(i) == OP_CALL) { /* regular call? */ - (L->ci-1)->u.l.savedpc = pc; /* save `pc' to return later */ - (L->ci-1)->state = (CI_SAVEDPC | CI_CALLING); - } - else { /* tail call: put new frame in place of previous one */ - int aux; - base = (L->ci - 1)->base; /* `luaD_precall' may change the stack */ - ra = RA(i); - if (L->openupval) luaF_close(L, base); - for (aux = 0; ra+aux < L->top; aux++) /* move frame down */ - setobjs2s(base+aux-1, ra+aux); - (L->ci - 1)->top = L->top = base+aux; /* correct top */ - lua_assert(L->ci->state & CI_SAVEDPC); - (L->ci - 1)->u.l.savedpc = L->ci->u.l.savedpc; - (L->ci - 1)->u.l.tailcalls++; /* one more call lost */ - (L->ci - 1)->state = CI_SAVEDPC; - L->ci--; /* remove new frame */ - L->base = L->ci->base; - } - goto callentry; - } - break; - } - case OP_RETURN: { - CallInfo *ci = L->ci - 1; /* previous function frame */ - int b = GETARG_B(i); - if (b != 0) L->top = ra+b-1; - lua_assert(L->ci->state & CI_HASFRAME); - if (L->openupval) luaF_close(L, base); - L->ci->state = CI_SAVEDPC; /* deactivate current function */ - L->ci->u.l.savedpc = pc; - /* previous function was running `here'? */ - if (!(ci->state & CI_CALLING)) { - lua_assert((ci->state & CI_C) || ci->u.l.pc != &pc); - return ra; /* no: return */ - } - else { /* yes: continue its execution */ - int nresults; - lua_assert(ci->u.l.pc == &pc && - ttisfunction(ci->base - 1) && - (ci->state & CI_SAVEDPC)); - lua_assert(GET_OPCODE(*(ci->u.l.savedpc - 1)) == OP_CALL); - nresults = GETARG_C(*(ci->u.l.savedpc - 1)) - 1; - luaD_poscall(L, nresults, ra); - if (nresults >= 0) L->top = L->ci->top; - goto retentry; - } - } - case OP_FORLOOP: { - lua_Number step, idx, limit; - const TObject *plimit = ra+1; - const TObject *pstep = ra+2; - if (!ttisnumber(ra)) - luaG_runerror(L, "`for' initial value must be a number"); - if (!tonumber(plimit, ra+1)) - luaG_runerror(L, "`for' limit must be a number"); - if (!tonumber(pstep, ra+2)) - luaG_runerror(L, "`for' step must be a number"); - step = nvalue(pstep); - idx = nvalue(ra) + step; /* increment index */ - limit = nvalue(plimit); - if (step > 0 ? idx <= limit : idx >= limit) { - dojump(pc, GETARG_sBx(i)); /* jump back */ - chgnvalue(ra, idx); /* update index */ - } - break; - } - case OP_TFORLOOP: { - int nvar = GETARG_C(i) + 1; - StkId cb = ra + nvar + 2; /* call base */ - setobjs2s(cb, ra); - setobjs2s(cb+1, ra+1); - setobjs2s(cb+2, ra+2); - L->top = cb+3; /* func. + 2 args (state and index) */ - luaD_call(L, cb, nvar); - L->top = L->ci->top; - ra = XRA(i) + 2; /* final position of first result */ - cb = ra + nvar; - do { /* move results to proper positions */ - nvar--; - setobjs2s(ra+nvar, cb+nvar); - } while (nvar > 0); - if (ttisnil(ra)) /* break loop? */ - pc++; /* skip jump (break loop) */ - else - dojump(pc, GETARG_sBx(*pc) + 1); /* jump back */ - break; - } - case OP_TFORPREP: { /* for compatibility only */ - if (ttistable(ra)) { - setobjs2s(ra+1, ra); - setobj2s(ra, luaH_getstr(hvalue(gt(L)), luaS_new(L, "next"))); - } - dojump(pc, GETARG_sBx(i)); - break; - } - case OP_SETLIST: - case OP_SETLISTO: { - int bc; - int n; - Table *h; - runtime_check(L, ttistable(ra)); - h = hvalue(ra); - bc = GETARG_Bx(i); - if (GET_OPCODE(i) == OP_SETLIST) - n = (bc&(LFIELDS_PER_FLUSH-1)) + 1; - else { - n = L->top - ra - 1; - L->top = L->ci->top; - } - bc &= ~(LFIELDS_PER_FLUSH-1); /* bc = bc - bc%FPF */ - for (; n > 0; n--) - setobj2t(luaH_setnum(L, h, bc+n), ra+n); /* write barrier */ - break; - } - case OP_CLOSE: { - luaF_close(L, ra); - break; - } - case OP_CLOSURE: { - Proto *p; - Closure *ncl; - int nup, j; - p = cl->p->p[GETARG_Bx(i)]; - nup = p->nups; - ncl = luaF_newLclosure(L, nup, &cl->g); - ncl->l.p = p; - for (j=0; j<nup; j++, pc++) { - if (GET_OPCODE(*pc) == OP_GETUPVAL) - ncl->l.upvals[j] = cl->upvals[GETARG_B(*pc)]; - else { - lua_assert(GET_OPCODE(*pc) == OP_MOVE); - ncl->l.upvals[j] = luaF_findupval(L, base + GETARG_B(*pc)); - } - } - setclvalue(ra, ncl); - luaC_checkGC(L); - break; - } - } - } -} - +/*
+** $Id: lvm.c,v 1.4 2004-11-27 21:35:20 pixel Exp $
+** Lua virtual machine
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* needed only when `lua_number2str' uses `sprintf' */
+#include <stdio.h>
+
+#define lvm_c
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lgc.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+#include "lvm.h"
+
+
+
+/* function to convert a lua_Number to a string */
+#ifndef lua_number2str
+#define lua_number2str(s,n) sprintf((s), LUA_NUMBER_FMT, (n))
+#endif
+
+
+/* limit for table tag-method chains (to avoid loops) */
+#define MAXTAGLOOP 100
+
+
+const TObject *luaV_tonumber (const TObject *obj, TObject *n) {
+ lua_Number num;
+ if (ttisnumber(obj)) return obj;
+ if (ttisstring(obj) && luaO_str2d(svalue(obj), &num)) {
+ setnvalue(n, num);
+ return n;
+ }
+ else
+ return NULL;
+}
+
+
+int luaV_tostring (lua_State *L, StkId obj) {
+ if (!ttisnumber(obj))
+ return 0;
+ else {
+ char s[32]; /* 16 digits, sign, point and \0 (+ some extra...) */
+ lua_number2str(s, nvalue(obj));
+ setsvalue2s(obj, luaS_new(L, s));
+ return 1;
+ }
+}
+
+
+static void traceexec (lua_State *L) {
+ lu_byte mask = L->hookmask;
+ if (mask > LUA_MASKLINE) { /* instruction-hook set? */
+ if (L->hookcount == 0) {
+ resethookcount(L);
+ luaD_callhook(L, LUA_HOOKCOUNT, -1);
+ return;
+ }
+ }
+ if (mask & LUA_MASKLINE) {
+ CallInfo *ci = L->ci;
+ Proto *p = ci_func(ci)->l.p;
+ int newline = getline(p, pcRel(*ci->u.l.pc, p));
+ if (!L->hookinit) {
+ luaG_inithooks(L);
+ return;
+ }
+ lua_assert(ci->state & CI_HASFRAME);
+ if (pcRel(*ci->u.l.pc, p) == 0) /* tracing may be starting now? */
+ ci->u.l.savedpc = *ci->u.l.pc; /* initialize `savedpc' */
+ /* calls linehook when enters a new line or jumps back (loop) */
+ if (*ci->u.l.pc <= ci->u.l.savedpc ||
+ newline != getline(p, pcRel(ci->u.l.savedpc, p))) {
+ luaD_callhook(L, LUA_HOOKLINE, newline);
+ ci = L->ci; /* previous call may reallocate `ci' */
+ }
+ ci->u.l.savedpc = *ci->u.l.pc;
+ }
+}
+
+
+static void callTMres (lua_State *L, const TObject *f,
+ const TObject *p1, const TObject *p2) {
+ setobj2s(L->top, f); /* push function */
+ setobj2s(L->top+1, p1); /* 1st argument */
+ setobj2s(L->top+2, p2); /* 2nd argument */
+ luaD_checkstack(L, 3); /* cannot check before (could invalidate p1, p2) */
+ L->top += 3;
+ luaD_call(L, L->top - 3, 1);
+ L->top--; /* result will be in L->top */
+}
+
+
+
+static void callTM (lua_State *L, const TObject *f,
+ const TObject *p1, const TObject *p2, const TObject *p3) {
+ setobj2s(L->top, f); /* push function */
+ setobj2s(L->top+1, p1); /* 1st argument */
+ setobj2s(L->top+2, p2); /* 2nd argument */
+ setobj2s(L->top+3, p3); /* 3th argument */
+ luaD_checkstack(L, 4); /* cannot check before (could invalidate p1...p3) */
+ L->top += 4;
+ luaD_call(L, L->top - 4, 0);
+}
+
+
+static const TObject *luaV_index (lua_State *L, const TObject *t,
+ TObject *key, int loop) {
+ const TObject *tm = fasttm(L, hvalue(t)->metatable, TM_INDEX);
+ if (tm == NULL) return &luaO_nilobject; /* no TM */
+ if (ttisfunction(tm)) {
+ callTMres(L, tm, t, key);
+ return L->top;
+ }
+ else return luaV_gettable(L, tm, key, loop);
+}
+
+static const TObject *luaV_getnotable (lua_State *L, const TObject *t,
+ TObject *key, int loop) {
+ const TObject *tm = luaT_gettmbyobj(L, t, TM_INDEX);
+ if (ttisnil(tm))
+ luaG_typeerror(L, t, "index");
+ if (ttisfunction(tm)) {
+ callTMres(L, tm, t, key);
+ return L->top;
+ }
+ else return luaV_gettable(L, tm, key, loop);
+}
+
+
+/*
+** Function to index a table.
+** Receives the table at `t' and the key at `key'.
+** leaves the result at `res'.
+*/
+const TObject *luaV_gettable (lua_State *L, const TObject *t, TObject *key,
+ int loop) {
+ if (loop > MAXTAGLOOP)
+ luaG_runerror(L, "loop in gettable");
+ if (ttistable(t)) { /* `t' is a table? */
+ Table *h = hvalue(t);
+ const TObject *v = luaH_get(h, key); /* do a primitive get */
+ if (!ttisnil(v)) return v;
+ else return luaV_index(L, t, key, loop+1);
+ }
+ else return luaV_getnotable(L, t, key, loop+1);
+}
+
+
+/*
+** Receives table at `t', key at `key' and value at `val'.
+*/
+void luaV_settable (lua_State *L, const TObject *t, TObject *key, StkId val) {
+ const TObject *tm;
+ int loop = 0;
+ do {
+ if (ttistable(t)) { /* `t' is a table? */
+ Table *h = hvalue(t);
+ TObject *oldval = luaH_set(L, h, key); /* do a primitive set */
+ if (!ttisnil(oldval) || /* result is no nil? */
+ (tm = fasttm(L, h->metatable, TM_NEWINDEX)) == NULL) { /* or no TM? */
+ setobj2t(oldval, val); /* write barrier */
+ return;
+ }
+ /* else will try the tag method */
+ }
+ else if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_NEWINDEX)))
+ luaG_typeerror(L, t, "index");
+ if (ttisfunction(tm)) {
+ callTM(L, tm, t, key, val);
+ return;
+ }
+ t = tm; /* else repeat with `tm' */
+ } while (++loop <= MAXTAGLOOP);
+ luaG_runerror(L, "loop in settable");
+}
+
+
+static int call_binTM (lua_State *L, const TObject *p1, const TObject *p2,
+ StkId res, TMS event) {
+ ptrdiff_t result = savestack(L, res);
+ const TObject *tm = luaT_gettmbyobj(L, p1, event); /* try first operand */
+ if (ttisnil(tm))
+ tm = luaT_gettmbyobj(L, p2, event); /* try second operand */
+ if (!ttisfunction(tm)) return 0;
+ callTMres(L, tm, p1, p2);
+ res = restorestack(L, result); /* previous call may change stack */
+ setobjs2s(res, L->top);
+ return 1;
+}
+
+
+static const TObject *get_compTM (lua_State *L, Table *mt1, Table *mt2,
+ TMS event) {
+ const TObject *tm1 = fasttm(L, mt1, event);
+ const TObject *tm2;
+ if (tm1 == NULL) return NULL; /* no metamethod */
+ if (mt1 == mt2) return tm1; /* same metatables => same metamethods */
+ tm2 = fasttm(L, mt2, event);
+ if (tm2 == NULL) return NULL; /* no metamethod */
+ if (luaO_rawequalObj(tm1, tm2)) /* same metamethods? */
+ return tm1;
+ return NULL;
+}
+
+
+static int call_orderTM (lua_State *L, const TObject *p1, const TObject *p2,
+ TMS event) {
+ const TObject *tm1 = luaT_gettmbyobj(L, p1, event);
+ const TObject *tm2;
+ if (ttisnil(tm1)) return -1; /* no metamethod? */
+ tm2 = luaT_gettmbyobj(L, p2, event);
+ if (!luaO_rawequalObj(tm1, tm2)) /* different metamethods? */
+ return -1;
+ callTMres(L, tm1, p1, p2);
+ return !l_isfalse(L->top);
+}
+
+
+static int luaV_strcmp (const TString *ls, const TString *rs) {
+ const char *l = getstr(ls);
+ size_t ll = ls->tsv.len;
+ const char *r = getstr(rs);
+ size_t lr = rs->tsv.len;
+ for (;;) {
+ int temp = strcoll(l, r);
+ if (temp != 0) return temp;
+ else { /* strings are equal up to a `\0' */
+ size_t len = strlen(l); /* index of first `\0' in both strings */
+ if (len == lr) /* r is finished? */
+ return (len == ll) ? 0 : 1;
+ else if (len == ll) /* l is finished? */
+ return -1; /* l is smaller than r (because r is not finished) */
+ /* both strings longer than `len'; go on comparing (after the `\0') */
+ len++;
+ l += len; ll -= len; r += len; lr -= len;
+ }
+ }
+}
+
+
+int luaV_lessthan (lua_State *L, const TObject *l, const TObject *r) {
+ int res;
+ if (ttype(l) != ttype(r))
+ return luaG_ordererror(L, l, r);
+ else if (ttisnumber(l))
+ return nvalue(l) < nvalue(r);
+ else if (ttisstring(l))
+ return luaV_strcmp(tsvalue(l), tsvalue(r)) < 0;
+ else if ((res = call_orderTM(L, l, r, TM_LT)) != -1)
+ return res;
+ return luaG_ordererror(L, l, r);
+}
+
+
+static int luaV_lessequal (lua_State *L, const TObject *l, const TObject *r) {
+ int res;
+ if (ttype(l) != ttype(r))
+ return luaG_ordererror(L, l, r);
+ else if (ttisnumber(l))
+ return nvalue(l) <= nvalue(r);
+ else if (ttisstring(l))
+ return luaV_strcmp(tsvalue(l), tsvalue(r)) <= 0;
+ else if ((res = call_orderTM(L, l, r, TM_LE)) != -1) /* first try `le' */
+ return res;
+ else if ((res = call_orderTM(L, r, l, TM_LT)) != -1) /* else try `lt' */
+ return !res;
+ return luaG_ordererror(L, l, r);
+}
+
+
+int luaV_equalval (lua_State *L, const TObject *t1, const TObject *t2) {
+ const TObject *tm;
+ lua_assert(ttype(t1) == ttype(t2));
+ switch (ttype(t1)) {
+ case LUA_TNIL: return 1;
+ case LUA_TNUMBER: return nvalue(t1) == nvalue(t2);
+ case LUA_TBOOLEAN: return bvalue(t1) == bvalue(t2); /* true must be 1 !! */
+ case LUA_TLIGHTUSERDATA: return pvalue(t1) == pvalue(t2);
+ case LUA_TUSERDATA: {
+ if (uvalue(t1) == uvalue(t2)) return 1;
+ tm = get_compTM(L, uvalue(t1)->uv.metatable, uvalue(t2)->uv.metatable,
+ TM_EQ);
+ break; /* will try TM */
+ }
+ case LUA_TTABLE: {
+ if (hvalue(t1) == hvalue(t2)) return 1;
+ tm = get_compTM(L, hvalue(t1)->metatable, hvalue(t2)->metatable, TM_EQ);
+ break; /* will try TM */
+ }
+ default: return gcvalue(t1) == gcvalue(t2);
+ }
+ if (tm == NULL) return 0; /* no TM? */
+ callTMres(L, tm, t1, t2); /* call TM */
+ return !l_isfalse(L->top);
+}
+
+
+void luaV_concat (lua_State *L, int total, int last) {
+ do {
+ StkId top = L->base + last + 1;
+ int n = 2; /* number of elements handled in this pass (at least 2) */
+ if (!tostring(L, top-2) || !tostring(L, top-1)) {
+ if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT))
+ luaG_concaterror(L, top-2, top-1);
+ } else if (tsvalue(top-1)->tsv.len > 0) { /* if len=0, do nothing */
+ /* at least two string values; get as many as possible */
+ lu_mem tl = cast(lu_mem, tsvalue(top-1)->tsv.len) +
+ cast(lu_mem, tsvalue(top-2)->tsv.len);
+ char *buffer;
+ int i;
+ while (n < total && tostring(L, top-n-1)) { /* collect total length */
+ tl += tsvalue(top-n-1)->tsv.len;
+ n++;
+ }
+ if (tl > MAX_SIZET) luaG_runerror(L, "string size overflow");
+ buffer = luaZ_openspace(L, &G(L)->buff, tl);
+ tl = 0;
+ for (i=n; i>0; i--) { /* concat all strings */
+ size_t l = tsvalue(top-i)->tsv.len;
+ memcpy(buffer+tl, svalue(top-i), l);
+ tl += l;
+ }
+ setsvalue2s(top-n, luaS_newlstr(L, buffer, tl));
+ }
+ total -= n-1; /* got `n' strings to create 1 new */
+ last -= n-1;
+ } while (total > 1); /* repeat until only 1 result left */
+}
+
+
+static void Arith (lua_State *L, StkId ra,
+ const TObject *rb, const TObject *rc, TMS op) {
+ TObject tempb, tempc;
+ const TObject *b, *c;
+ if ((b = luaV_tonumber(rb, &tempb)) != NULL &&
+ (c = luaV_tonumber(rc, &tempc)) != NULL) {
+ switch (op) {
+ case TM_ADD: setnvalue(ra, nvalue(b) + nvalue(c)); break;
+ case TM_SUB: setnvalue(ra, nvalue(b) - nvalue(c)); break;
+ case TM_MUL: setnvalue(ra, nvalue(b) * nvalue(c)); break;
+ case TM_DIV: setnvalue(ra, nvalue(b) / nvalue(c)); break;
+ case TM_POW: {
+ const TObject *f = luaH_getstr(hvalue(gt(L)), G(L)->tmname[TM_POW]);
+ ptrdiff_t res = savestack(L, ra);
+ if (!ttisfunction(f))
+ luaG_runerror(L, "`__pow' (`^' operator) is not a function");
+ callTMres(L, f, b, c);
+ ra = restorestack(L, res); /* previous call may change stack */
+ setobjs2s(ra, L->top);
+ break;
+ }
+ default: lua_assert(0); break;
+ }
+ }
+ else if (!call_binTM(L, rb, rc, ra, op))
+ luaG_aritherror(L, rb, rc);
+}
+
+
+
+/*
+** some macros for common tasks in `luaV_execute'
+*/
+
+#define runtime_check(L, c) { if (!(c)) return 0; }
+
+#define RA(i) (base+GETARG_A(i))
+/* to be used after possible stack reallocation */
+#define XRA(i) (L->base+GETARG_A(i))
+#define RB(i) (base+GETARG_B(i))
+#define RKB(i) ((GETARG_B(i) < MAXSTACK) ? RB(i) : k+GETARG_B(i)-MAXSTACK)
+#define RC(i) (base+GETARG_C(i))
+#define RKC(i) ((GETARG_C(i) < MAXSTACK) ? RC(i) : k+GETARG_C(i)-MAXSTACK)
+#define KBx(i) (k+GETARG_Bx(i))
+
+
+#define dojump(pc, i) ((pc) += (i))
+
+
+StkId luaV_execute (lua_State *L) {
+ LClosure *cl;
+ TObject *k;
+ const Instruction *pc;
+ callentry: /* entry point when calling new functions */
+ L->ci->u.l.pc = &pc;
+ if (L->hookmask & LUA_MASKCALL)
+ luaD_callhook(L, LUA_HOOKCALL, -1);
+ retentry: /* entry point when returning to old functions */
+ lua_assert(L->ci->state == CI_SAVEDPC ||
+ L->ci->state == (CI_SAVEDPC | CI_CALLING));
+ L->ci->state = CI_HASFRAME; /* activate frame */
+ pc = L->ci->u.l.savedpc;
+ cl = &clvalue(L->base - 1)->l;
+ k = cl->p->k;
+ /* main loop of interpreter */
+ for (;;) {
+ const Instruction i = *pc++;
+ StkId base, ra;
+ if ((L->hookmask & (LUA_MASKLINE | LUA_MASKCOUNT)) &&
+ (--L->hookcount == 0 || L->hookmask & LUA_MASKLINE)) {
+ traceexec(L);
+ if (L->ci->state & CI_YIELD) { /* did hook yield? */
+ L->ci->u.l.savedpc = pc - 1;
+ L->ci->state = CI_YIELD | CI_SAVEDPC;
+ return NULL;
+ }
+ if (L->ci->state & CI_BREAK) { /* did hook break? */
+ luaG_runerror(L, "breaking");
+ L->ci->state &= ~CI_BREAK;
+ }
+ }
+ /* warning!! several calls may realloc the stack and invalidate `ra' */
+ base = L->base;
+ ra = RA(i);
+ lua_assert(L->ci->state & CI_HASFRAME);
+ lua_assert(base == L->ci->base);
+ lua_assert(L->top <= L->stack + L->stacksize && L->top >= base);
+ lua_assert(L->top == L->ci->top ||
+ GET_OPCODE(i) == OP_CALL || GET_OPCODE(i) == OP_TAILCALL ||
+ GET_OPCODE(i) == OP_RETURN || GET_OPCODE(i) == OP_SETLISTO);
+ switch (GET_OPCODE(i)) {
+ case OP_MOVE: {
+ setobjs2s(ra, RB(i));
+ break;
+ }
+ case OP_LOADK: {
+ setobj2s(ra, KBx(i));
+ break;
+ }
+ case OP_LOADBOOL: {
+ setbvalue(ra, GETARG_B(i));
+ if (GETARG_C(i)) pc++; /* skip next instruction (if C) */
+ break;
+ }
+ case OP_LOADNIL: {
+ TObject *rb = RB(i);
+ do {
+ setnilvalue(rb--);
+ } while (rb >= ra);
+ break;
+ }
+ case OP_GETUPVAL: {
+ int b = GETARG_B(i);
+ setobj2s(ra, cl->upvals[b]->v);
+ break;
+ }
+ case OP_GETGLOBAL: {
+ TObject *rb = KBx(i);
+ const TObject *v;
+ lua_assert(ttisstring(rb) && ttistable(&cl->g));
+ v = luaH_getstr(hvalue(&cl->g), tsvalue(rb));
+ if (!ttisnil(v)) { setobj2s(ra, v); }
+ else
+ setobj2s(XRA(i), luaV_index(L, &cl->g, rb, 0));
+ break;
+ }
+ case OP_GETTABLE: {
+ StkId rb = RB(i);
+ TObject *rc = RKC(i);
+ if (ttistable(rb)) {
+ const TObject *v = luaH_get(hvalue(rb), rc);
+ if (!ttisnil(v)) { setobj2s(ra, v); }
+ else
+ setobj2s(XRA(i), luaV_index(L, rb, rc, 0));
+ }
+ else
+ setobj2s(XRA(i), luaV_getnotable(L, rb, rc, 0));
+ break;
+ }
+ case OP_SETGLOBAL: {
+ lua_assert(ttisstring(KBx(i)) && ttistable(&cl->g));
+ luaV_settable(L, &cl->g, KBx(i), ra);
+ break;
+ }
+ case OP_SETUPVAL: {
+ int b = GETARG_B(i);
+ setobj(cl->upvals[b]->v, ra); /* write barrier */
+ break;
+ }
+ case OP_SETTABLE: {
+ luaV_settable(L, ra, RKB(i), RKC(i));
+ break;
+ }
+ case OP_NEWTABLE: {
+ int b = GETARG_B(i);
+ b = fb2int(b);
+ sethvalue(ra, luaH_new(L, b, GETARG_C(i)));
+ luaC_checkGC(L);
+ break;
+ }
+ case OP_SELF: {
+ StkId rb = RB(i);
+ TObject *rc = RKC(i);
+ runtime_check(L, ttisstring(rc));
+ setobjs2s(ra+1, rb);
+ if (ttistable(rb)) {
+ const TObject *v = luaH_getstr(hvalue(rb), tsvalue(rc));
+ if (!ttisnil(v)) { setobj2s(ra, v); }
+ else
+ setobj2s(XRA(i), luaV_index(L, rb, rc, 0));
+ }
+ else
+ setobj2s(XRA(i), luaV_getnotable(L, rb, rc, 0));
+ break;
+ }
+ case OP_ADD: {
+ TObject *rb = RKB(i);
+ TObject *rc = RKC(i);
+ if (ttisnumber(rb) && ttisnumber(rc)) {
+ setnvalue(ra, nvalue(rb) + nvalue(rc));
+ }
+ else
+ Arith(L, ra, rb, rc, TM_ADD);
+ break;
+ }
+ case OP_SUB: {
+ TObject *rb = RKB(i);
+ TObject *rc = RKC(i);
+ if (ttisnumber(rb) && ttisnumber(rc)) {
+ setnvalue(ra, nvalue(rb) - nvalue(rc));
+ }
+ else
+ Arith(L, ra, rb, rc, TM_SUB);
+ break;
+ }
+ case OP_MUL: {
+ TObject *rb = RKB(i);
+ TObject *rc = RKC(i);
+ if (ttisnumber(rb) && ttisnumber(rc)) {
+ setnvalue(ra, nvalue(rb) * nvalue(rc));
+ }
+ else
+ Arith(L, ra, rb, rc, TM_MUL);
+ break;
+ }
+ case OP_DIV: {
+ TObject *rb = RKB(i);
+ TObject *rc = RKC(i);
+ if (ttisnumber(rb) && ttisnumber(rc)) {
+ setnvalue(ra, nvalue(rb) / nvalue(rc));
+ }
+ else
+ Arith(L, ra, rb, rc, TM_DIV);
+ break;
+ }
+ case OP_POW: {
+ Arith(L, ra, RKB(i), RKC(i), TM_POW);
+ break;
+ }
+ case OP_UNM: {
+ const TObject *rb = RB(i);
+ TObject temp;
+ if (tonumber(rb, &temp)) {
+ setnvalue(ra, -nvalue(rb));
+ }
+ else {
+ setnilvalue(&temp);
+ if (!call_binTM(L, RB(i), &temp, ra, TM_UNM))
+ luaG_aritherror(L, RB(i), &temp);
+ }
+ break;
+ }
+ case OP_NOT: {
+ int res = l_isfalse(RB(i)); /* next assignment may change this value */
+ setbvalue(ra, res);
+ break;
+ }
+ case OP_CONCAT: {
+ int b = GETARG_B(i);
+ int c = GETARG_C(i);
+ luaV_concat(L, c-b+1, c); /* may change `base' (and `ra') */
+ base = L->base;
+ setobjs2s(RA(i), base+b);
+ luaC_checkGC(L);
+ break;
+ }
+ case OP_JMP: {
+ dojump(pc, GETARG_sBx(i));
+ break;
+ }
+ case OP_EQ: {
+ if (equalobj(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++;
+ else dojump(pc, GETARG_sBx(*pc) + 1);
+ break;
+ }
+ case OP_LT: {
+ if (luaV_lessthan(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++;
+ else dojump(pc, GETARG_sBx(*pc) + 1);
+ break;
+ }
+ case OP_LE: {
+ if (luaV_lessequal(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++;
+ else dojump(pc, GETARG_sBx(*pc) + 1);
+ break;
+ }
+ case OP_TEST: {
+ TObject *rb = RB(i);
+ if (l_isfalse(rb) == GETARG_C(i)) pc++;
+ else {
+ setobjs2s(ra, rb);
+ dojump(pc, GETARG_sBx(*pc) + 1);
+ }
+ break;
+ }
+ case OP_CALL:
+ case OP_TAILCALL: {
+ StkId firstResult;
+ int b = GETARG_B(i);
+ int nresults;
+ if (b != 0) L->top = ra+b; /* else previous instruction set top */
+ nresults = GETARG_C(i) - 1;
+ firstResult = luaD_precall(L, ra);
+ if (firstResult) {
+ if (firstResult > L->top) { /* yield? */
+ lua_assert(L->ci->state == (CI_C | CI_YIELD));
+ (L->ci - 1)->u.l.savedpc = pc;
+ (L->ci - 1)->state = CI_SAVEDPC;
+ return NULL;
+ }
+ /* it was a C function (`precall' called it); adjust results */
+ luaD_poscall(L, nresults, firstResult);
+ if (nresults >= 0) L->top = L->ci->top;
+ }
+ else { /* it is a Lua function */
+ if (GET_OPCODE(i) == OP_CALL) { /* regular call? */
+ (L->ci-1)->u.l.savedpc = pc; /* save `pc' to return later */
+ (L->ci-1)->state = (CI_SAVEDPC | CI_CALLING);
+ }
+ else { /* tail call: put new frame in place of previous one */
+ int aux;
+ base = (L->ci - 1)->base; /* `luaD_precall' may change the stack */
+ ra = RA(i);
+ if (L->openupval) luaF_close(L, base);
+ for (aux = 0; ra+aux < L->top; aux++) /* move frame down */
+ setobjs2s(base+aux-1, ra+aux);
+ (L->ci - 1)->top = L->top = base+aux; /* correct top */
+ lua_assert(L->ci->state & CI_SAVEDPC);
+ (L->ci - 1)->u.l.savedpc = L->ci->u.l.savedpc;
+ (L->ci - 1)->u.l.tailcalls++; /* one more call lost */
+ (L->ci - 1)->state = CI_SAVEDPC;
+ L->ci--; /* remove new frame */
+ L->base = L->ci->base;
+ }
+ goto callentry;
+ }
+ break;
+ }
+ case OP_RETURN: {
+ CallInfo *ci = L->ci - 1; /* previous function frame */
+ int b = GETARG_B(i);
+ if (b != 0) L->top = ra+b-1;
+ lua_assert(L->ci->state & CI_HASFRAME);
+ if (L->openupval) luaF_close(L, base);
+ L->ci->state = CI_SAVEDPC; /* deactivate current function */
+ L->ci->u.l.savedpc = pc;
+ /* previous function was running `here'? */
+ if (!(ci->state & CI_CALLING)) {
+ lua_assert((ci->state & CI_C) || ci->u.l.pc != &pc);
+ return ra; /* no: return */
+ }
+ else { /* yes: continue its execution */
+ int nresults;
+ lua_assert(ci->u.l.pc == &pc &&
+ ttisfunction(ci->base - 1) &&
+ (ci->state & CI_SAVEDPC));
+ lua_assert(GET_OPCODE(*(ci->u.l.savedpc - 1)) == OP_CALL);
+ nresults = GETARG_C(*(ci->u.l.savedpc - 1)) - 1;
+ luaD_poscall(L, nresults, ra);
+ if (nresults >= 0) L->top = L->ci->top;
+ goto retentry;
+ }
+ }
+ case OP_FORLOOP: {
+ lua_Number step, idx, limit;
+ const TObject *plimit = ra+1;
+ const TObject *pstep = ra+2;
+ if (!ttisnumber(ra))
+ luaG_runerror(L, "`for' initial value must be a number");
+ if (!tonumber(plimit, ra+1))
+ luaG_runerror(L, "`for' limit must be a number");
+ if (!tonumber(pstep, ra+2))
+ luaG_runerror(L, "`for' step must be a number");
+ step = nvalue(pstep);
+ idx = nvalue(ra) + step; /* increment index */
+ limit = nvalue(plimit);
+ if (step > 0 ? idx <= limit : idx >= limit) {
+ dojump(pc, GETARG_sBx(i)); /* jump back */
+ chgnvalue(ra, idx); /* update index */
+ }
+ break;
+ }
+ case OP_TFORLOOP: {
+ int nvar = GETARG_C(i) + 1;
+ StkId cb = ra + nvar + 2; /* call base */
+ setobjs2s(cb, ra);
+ setobjs2s(cb+1, ra+1);
+ setobjs2s(cb+2, ra+2);
+ L->top = cb+3; /* func. + 2 args (state and index) */
+ luaD_call(L, cb, nvar);
+ L->top = L->ci->top;
+ ra = XRA(i) + 2; /* final position of first result */
+ cb = ra + nvar;
+ do { /* move results to proper positions */
+ nvar--;
+ setobjs2s(ra+nvar, cb+nvar);
+ } while (nvar > 0);
+ if (ttisnil(ra)) /* break loop? */
+ pc++; /* skip jump (break loop) */
+ else
+ dojump(pc, GETARG_sBx(*pc) + 1); /* jump back */
+ break;
+ }
+ case OP_TFORPREP: { /* for compatibility only */
+ if (ttistable(ra)) {
+ setobjs2s(ra+1, ra);
+ setobj2s(ra, luaH_getstr(hvalue(gt(L)), luaS_new(L, "next")));
+ }
+ dojump(pc, GETARG_sBx(i));
+ break;
+ }
+ case OP_SETLIST:
+ case OP_SETLISTO: {
+ int bc;
+ int n;
+ Table *h;
+ runtime_check(L, ttistable(ra));
+ h = hvalue(ra);
+ bc = GETARG_Bx(i);
+ if (GET_OPCODE(i) == OP_SETLIST)
+ n = (bc&(LFIELDS_PER_FLUSH-1)) + 1;
+ else {
+ n = L->top - ra - 1;
+ L->top = L->ci->top;
+ }
+ bc &= ~(LFIELDS_PER_FLUSH-1); /* bc = bc - bc%FPF */
+ for (; n > 0; n--)
+ setobj2t(luaH_setnum(L, h, bc+n), ra+n); /* write barrier */
+ break;
+ }
+ case OP_CLOSE: {
+ luaF_close(L, ra);
+ break;
+ }
+ case OP_CLOSURE: {
+ Proto *p;
+ Closure *ncl;
+ int nup, j;
+ p = cl->p->p[GETARG_Bx(i)];
+ nup = p->nups;
+ ncl = luaF_newLclosure(L, nup, &cl->g);
+ ncl->l.p = p;
+ for (j=0; j<nup; j++, pc++) {
+ if (GET_OPCODE(*pc) == OP_GETUPVAL)
+ ncl->l.upvals[j] = cl->upvals[GETARG_B(*pc)];
+ else {
+ lua_assert(GET_OPCODE(*pc) == OP_MOVE);
+ ncl->l.upvals[j] = luaF_findupval(L, base + GETARG_B(*pc));
+ }
+ }
+ setclvalue(ra, ncl);
+ luaC_checkGC(L);
+ break;
+ }
+ }
+ }
+}
+
diff --git a/lib/lua/src/lzio.c b/lib/lua/src/lzio.c index 6f52ec6..e3aefa0 100644 --- a/lib/lua/src/lzio.c +++ b/lib/lua/src/lzio.c @@ -1,81 +1,81 @@ -/* -** $Id: lzio.c,v 1.2 2003-12-11 16:53:30 pixel Exp $ -** a generic input stream interface -** See Copyright Notice in lua.h -*/ - - -#include <string.h> - -#define lzio_c - -#include "lua.h" - -#include "llimits.h" -#include "lmem.h" -#include "lzio.h" - - -int luaZ_fill (ZIO *z) { - size_t size; - const char *buff = z->reader(NULL, z->data, &size); - if (buff == NULL || size == 0) return EOZ; - z->n = size - 1; - z->p = buff; - return char2int(*(z->p++)); -} - - -int luaZ_lookahead (ZIO *z) { - if (z->n == 0) { - int c = luaZ_fill(z); - if (c == EOZ) return c; - z->n++; - z->p--; - } - return char2int(*z->p); -} - - -void luaZ_init (ZIO *z, lua_Chunkreader reader, void *data, const char *name) { - z->reader = reader; - z->data = data; - z->name = name; - z->n = 0; - z->p = NULL; -} - - -/* --------------------------------------------------------------- read --- */ -size_t luaZ_read (ZIO *z, void *b, size_t n) { - while (n) { - size_t m; - if (z->n == 0) { - if (luaZ_fill(z) == EOZ) - return n; /* return number of missing bytes */ - else { - ++z->n; /* filbuf removed first byte; put back it */ - --z->p; - } - } - m = (n <= z->n) ? n : z->n; /* min. between n and z->n */ - memcpy(b, z->p, m); - z->n -= m; - z->p += m; - b = (char *)b + m; - n -= m; - } - return 0; -} - -/* ------------------------------------------------------------------------ */ -char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n) { - if (n > buff->buffsize) { - if (n < LUA_MINBUFFER) n = LUA_MINBUFFER; - luaM_reallocvector(L, buff->buffer, buff->buffsize, n, char); - buff->buffsize = n; - } - return buff->buffer; -} - - +/*
+** $Id: lzio.c,v 1.3 2004-11-27 21:35:20 pixel Exp $
+** a generic input stream interface
+** See Copyright Notice in lua.h
+*/
+
+
+#include <string.h>
+
+#define lzio_c
+
+#include "lua.h"
+
+#include "llimits.h"
+#include "lmem.h"
+#include "lzio.h"
+
+
+int luaZ_fill (ZIO *z) {
+ size_t size;
+ const char *buff = z->reader(NULL, z->data, &size);
+ if (buff == NULL || size == 0) return EOZ;
+ z->n = size - 1;
+ z->p = buff;
+ return char2int(*(z->p++));
+}
+
+
+int luaZ_lookahead (ZIO *z) {
+ if (z->n == 0) {
+ int c = luaZ_fill(z);
+ if (c == EOZ) return c;
+ z->n++;
+ z->p--;
+ }
+ return char2int(*z->p);
+}
+
+
+void luaZ_init (ZIO *z, lua_Chunkreader reader, void *data, const char *name) {
+ z->reader = reader;
+ z->data = data;
+ z->name = name;
+ z->n = 0;
+ z->p = NULL;
+}
+
+
+/* --------------------------------------------------------------- read --- */
+size_t luaZ_read (ZIO *z, void *b, size_t n) {
+ while (n) {
+ size_t m;
+ if (z->n == 0) {
+ if (luaZ_fill(z) == EOZ)
+ return n; /* return number of missing bytes */
+ else {
+ ++z->n; /* filbuf removed first byte; put back it */
+ --z->p;
+ }
+ }
+ m = (n <= z->n) ? n : z->n; /* min. between n and z->n */
+ memcpy(b, z->p, m);
+ z->n -= m;
+ z->p += m;
+ b = (char *)b + m;
+ n -= m;
+ }
+ return 0;
+}
+
+/* ------------------------------------------------------------------------ */
+char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n) {
+ if (n > buff->buffsize) {
+ if (n < LUA_MINBUFFER) n = LUA_MINBUFFER;
+ luaM_reallocvector(L, buff->buffer, buff->buffsize, n, char);
+ buff->buffsize = n;
+ }
+ return buff->buffer;
+}
+
+
|