diff options
Diffstat (limited to 'lua/lauxlib.c')
| -rw-r--r-- | lua/lauxlib.c | 343 |
1 files changed, 202 insertions, 141 deletions
diff --git a/lua/lauxlib.c b/lua/lauxlib.c index b00f8c7..5d362c3 100644 --- a/lua/lauxlib.c +++ b/lua/lauxlib.c @@ -1,9 +1,14 @@ /* -** $Id: lauxlib.c,v 1.248.1.1 2013/04/12 18:48:47 roberto Exp $ +** $Id: lauxlib.c,v 1.284 2015/11/19 19:16:22 roberto Exp $ ** Auxiliary functions for building Lua libraries ** See Copyright Notice in lua.h */ +#define lauxlib_c +#define LUA_LIB + +#include "lprefix.h" + #include <errno.h> #include <stdarg.h> @@ -16,9 +21,6 @@ ** Any function declared here could be written as an application function. */ -#define lauxlib_c -#define LUA_LIB - #include "lua.h" #include "lauxlib.h" @@ -31,8 +33,8 @@ */ -#define LEVELS1 12 /* size of the first part of the stack */ -#define LEVELS2 10 /* size of the second part of the stack */ +#define LEVELS1 10 /* size of the first part of the stack */ +#define LEVELS2 11 /* size of the second part of the stack */ @@ -64,11 +66,20 @@ static int findfield (lua_State *L, int objidx, int level) { } +/* +** Search for a name for a function in all loaded modules +** (registry._LOADED). +*/ static int pushglobalfuncname (lua_State *L, lua_Debug *ar) { int top = lua_gettop(L); lua_getinfo(L, "f", ar); /* push function */ - lua_pushglobaltable(L); + lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED"); if (findfield(L, top + 1, 2)) { + const char *name = lua_tostring(L, -1); + if (strncmp(name, "_G.", 3) == 0) { /* name start with '_G.'? */ + lua_pushstring(L, name + 3); /* push name without prefix */ + lua_remove(L, -2); /* remove original name */ + } lua_copy(L, -1, top + 1); /* move name to proper place */ lua_pop(L, 2); /* remove pushed values */ return 1; @@ -81,24 +92,22 @@ static int pushglobalfuncname (lua_State *L, lua_Debug *ar) { static void pushfuncname (lua_State *L, lua_Debug *ar) { - if (*ar->namewhat != '\0') /* is there a name? */ - lua_pushfstring(L, "function " LUA_QS, ar->name); + if (pushglobalfuncname(L, ar)) { /* try first a global name */ + lua_pushfstring(L, "function '%s'", lua_tostring(L, -1)); + lua_remove(L, -2); /* remove name */ + } + else if (*ar->namewhat != '\0') /* is there a name from code? */ + lua_pushfstring(L, "%s '%s'", ar->namewhat, ar->name); /* use it */ else if (*ar->what == 'm') /* main? */ lua_pushliteral(L, "main chunk"); - else if (*ar->what == 'C') { - if (pushglobalfuncname(L, ar)) { - lua_pushfstring(L, "function " LUA_QS, lua_tostring(L, -1)); - lua_remove(L, -2); /* remove name */ - } - else - lua_pushliteral(L, "?"); - } - else + else if (*ar->what != 'C') /* for Lua functions, use <file:line> */ lua_pushfstring(L, "function <%s:%d>", ar->short_src, ar->linedefined); + else /* nothing left... */ + lua_pushliteral(L, "?"); } -static int countlevels (lua_State *L) { +static int lastlevel (lua_State *L) { lua_Debug ar; int li = 1, le = 1; /* find an upper bound */ @@ -117,14 +126,16 @@ LUALIB_API void luaL_traceback (lua_State *L, lua_State *L1, const char *msg, int level) { lua_Debug ar; int top = lua_gettop(L); - int numlevels = countlevels(L1); - int mark = (numlevels > LEVELS1 + LEVELS2) ? LEVELS1 : 0; - if (msg) lua_pushfstring(L, "%s\n", msg); + int last = lastlevel(L1); + int n1 = (last - level > LEVELS1 + LEVELS2) ? LEVELS1 : -1; + if (msg) + lua_pushfstring(L, "%s\n", msg); + luaL_checkstack(L, 10, NULL); lua_pushliteral(L, "stack traceback:"); while (lua_getstack(L1, level++, &ar)) { - if (level == mark) { /* too many levels? */ + if (n1-- == 0) { /* too many levels? */ lua_pushliteral(L, "\n\t..."); /* add a '...' */ - level = numlevels - LEVELS2; /* and skip to last ones */ + level = last - LEVELS2 + 1; /* and skip to last ones */ } else { lua_getinfo(L1, "Slnt", &ar); @@ -150,33 +161,40 @@ LUALIB_API void luaL_traceback (lua_State *L, lua_State *L1, ** ======================================================= */ -LUALIB_API int luaL_argerror (lua_State *L, int narg, const char *extramsg) { +LUALIB_API int luaL_argerror (lua_State *L, int arg, const char *extramsg) { lua_Debug ar; if (!lua_getstack(L, 0, &ar)) /* no stack frame? */ - return luaL_error(L, "bad argument #%d (%s)", narg, extramsg); + return luaL_error(L, "bad argument #%d (%s)", arg, extramsg); 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 " LUA_QS " on bad self (%s)", + arg--; /* do not count 'self' */ + if (arg == 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 = (pushglobalfuncname(L, &ar)) ? lua_tostring(L, -1) : "?"; - return luaL_error(L, "bad argument #%d to " LUA_QS " (%s)", - narg, ar.name, extramsg); + return luaL_error(L, "bad argument #%d to '%s' (%s)", + arg, ar.name, extramsg); } -static int typeerror (lua_State *L, int narg, const char *tname) { - const char *msg = lua_pushfstring(L, "%s expected, got %s", - tname, luaL_typename(L, narg)); - return luaL_argerror(L, narg, msg); +static int typeerror (lua_State *L, int arg, const char *tname) { + const char *msg; + const char *typearg; /* name for the type of the actual argument */ + if (luaL_getmetafield(L, arg, "__name") == LUA_TSTRING) + typearg = lua_tostring(L, -1); /* use the given type name */ + else if (lua_type(L, arg) == LUA_TLIGHTUSERDATA) + typearg = "light userdata"; /* special name for messages */ + else + typearg = luaL_typename(L, arg); /* standard name */ + msg = lua_pushfstring(L, "%s expected, got %s", tname, typearg); + return luaL_argerror(L, arg, msg); } -static void tag_error (lua_State *L, int narg, int tag) { - typeerror(L, narg, lua_typename(L, tag)); +static void tag_error (lua_State *L, int arg, int tag) { + typeerror(L, arg, lua_typename(L, tag)); } @@ -222,7 +240,7 @@ LUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) { } -#if !defined(inspectstat) /* { */ +#if !defined(l_inspectstat) /* { */ #if defined(LUA_USE_POSIX) @@ -231,13 +249,13 @@ LUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) { /* ** use appropriate macros to interpret 'pclose' return status */ -#define inspectstat(stat,what) \ +#define l_inspectstat(stat,what) \ if (WIFEXITED(stat)) { stat = WEXITSTATUS(stat); } \ else if (WIFSIGNALED(stat)) { stat = WTERMSIG(stat); what = "signal"; } #else -#define inspectstat(stat,what) /* no op */ +#define l_inspectstat(stat,what) /* no op */ #endif @@ -249,7 +267,7 @@ LUALIB_API int luaL_execresult (lua_State *L, int stat) { if (stat == -1) /* error? */ return luaL_fileresult(L, 0, NULL); else { - inspectstat(stat, what); /* interpret result */ + l_inspectstat(stat, what); /* interpret result */ if (*what == 'e' && stat == 0) /* successful termination? */ lua_pushboolean(L, 1); else @@ -270,11 +288,12 @@ LUALIB_API int luaL_execresult (lua_State *L, int stat) { */ LUALIB_API int luaL_newmetatable (lua_State *L, const char *tname) { - luaL_getmetatable(L, tname); /* try to get metatable */ - if (!lua_isnil(L, -1)) /* name already in use? */ + if (luaL_getmetatable(L, tname) != LUA_TNIL) /* name already in use? */ return 0; /* leave previous value on top, but return 0 */ lua_pop(L, 1); - lua_newtable(L); /* create metatable */ + lua_createtable(L, 0, 2); /* create metatable */ + lua_pushstring(L, tname); + lua_setfield(L, -2, "__name"); /* metatable.__name = tname */ lua_pushvalue(L, -1); lua_setfield(L, LUA_REGISTRYINDEX, tname); /* registry.name = metatable */ return 1; @@ -317,16 +336,16 @@ LUALIB_API void *luaL_checkudata (lua_State *L, int ud, const char *tname) { ** ======================================================= */ -LUALIB_API int luaL_checkoption (lua_State *L, int narg, const char *def, +LUALIB_API int luaL_checkoption (lua_State *L, int arg, const char *def, const char *const lst[]) { - const char *name = (def) ? luaL_optstring(L, narg, def) : - luaL_checkstring(L, narg); + const char *name = (def) ? luaL_optstring(L, arg, def) : + luaL_checkstring(L, arg); int i; for (i=0; lst[i]; i++) if (strcmp(lst[i], name) == 0) return i; - return luaL_argerror(L, narg, - lua_pushfstring(L, "invalid option " LUA_QS, name)); + return luaL_argerror(L, arg, + lua_pushfstring(L, "invalid option '%s'", name)); } @@ -342,77 +361,71 @@ LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *msg) { } -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_checktype (lua_State *L, int arg, int t) { + if (lua_type(L, arg) != t) + tag_error(L, arg, 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 void luaL_checkany (lua_State *L, int arg) { + if (lua_type(L, arg) == LUA_TNONE) + luaL_argerror(L, arg, "value expected"); } -LUALIB_API const char *luaL_checklstring (lua_State *L, int narg, size_t *len) { - const char *s = lua_tolstring(L, narg, len); - if (!s) tag_error(L, narg, LUA_TSTRING); +LUALIB_API const char *luaL_checklstring (lua_State *L, int arg, size_t *len) { + const char *s = lua_tolstring(L, arg, len); + if (!s) tag_error(L, arg, LUA_TSTRING); return s; } -LUALIB_API const char *luaL_optlstring (lua_State *L, int narg, +LUALIB_API const char *luaL_optlstring (lua_State *L, int arg, const char *def, size_t *len) { - if (lua_isnoneornil(L, narg)) { + if (lua_isnoneornil(L, arg)) { if (len) *len = (def ? strlen(def) : 0); return def; } - else return luaL_checklstring(L, narg, len); + else return luaL_checklstring(L, arg, len); } -LUALIB_API lua_Number luaL_checknumber (lua_State *L, int narg) { +LUALIB_API lua_Number luaL_checknumber (lua_State *L, int arg) { int isnum; - lua_Number d = lua_tonumberx(L, narg, &isnum); + lua_Number d = lua_tonumberx(L, arg, &isnum); if (!isnum) - tag_error(L, narg, LUA_TNUMBER); + tag_error(L, arg, LUA_TNUMBER); return d; } -LUALIB_API lua_Number luaL_optnumber (lua_State *L, int narg, lua_Number def) { - return luaL_opt(L, luaL_checknumber, narg, def); +LUALIB_API lua_Number luaL_optnumber (lua_State *L, int arg, lua_Number def) { + return luaL_opt(L, luaL_checknumber, arg, def); } -LUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int narg) { - int isnum; - lua_Integer d = lua_tointegerx(L, narg, &isnum); - if (!isnum) - tag_error(L, narg, LUA_TNUMBER); - return d; +static void interror (lua_State *L, int arg) { + if (lua_isnumber(L, arg)) + luaL_argerror(L, arg, "number has no integer representation"); + else + tag_error(L, arg, LUA_TNUMBER); } -LUALIB_API lua_Unsigned luaL_checkunsigned (lua_State *L, int narg) { +LUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int arg) { int isnum; - lua_Unsigned d = lua_tounsignedx(L, narg, &isnum); - if (!isnum) - tag_error(L, narg, LUA_TNUMBER); + lua_Integer d = lua_tointegerx(L, arg, &isnum); + if (!isnum) { + interror(L, arg); + } return d; } -LUALIB_API lua_Integer luaL_optinteger (lua_State *L, int narg, +LUALIB_API lua_Integer luaL_optinteger (lua_State *L, int arg, lua_Integer def) { - return luaL_opt(L, luaL_checkinteger, narg, def); -} - - -LUALIB_API lua_Unsigned luaL_optunsigned (lua_State *L, int narg, - lua_Unsigned def) { - return luaL_opt(L, luaL_checkunsigned, narg, def); + return luaL_opt(L, luaL_checkinteger, arg, def); } /* }====================================================== */ @@ -424,6 +437,47 @@ LUALIB_API lua_Unsigned luaL_optunsigned (lua_State *L, int narg, ** ======================================================= */ +/* userdata to box arbitrary data */ +typedef struct UBox { + void *box; + size_t bsize; +} UBox; + + +static void *resizebox (lua_State *L, int idx, size_t newsize) { + void *ud; + lua_Alloc allocf = lua_getallocf(L, &ud); + UBox *box = (UBox *)lua_touserdata(L, idx); + void *temp = allocf(ud, box->box, box->bsize, newsize); + if (temp == NULL && newsize > 0) { /* allocation error? */ + resizebox(L, idx, 0); /* free buffer */ + luaL_error(L, "not enough memory for buffer allocation"); + } + box->box = temp; + box->bsize = newsize; + return temp; +} + + +static int boxgc (lua_State *L) { + resizebox(L, 1, 0); + return 0; +} + + +static void *newbox (lua_State *L, size_t newsize) { + UBox *box = (UBox *)lua_newuserdata(L, sizeof(UBox)); + box->box = NULL; + box->bsize = 0; + if (luaL_newmetatable(L, "LUABOX")) { /* creating metatable? */ + lua_pushcfunction(L, boxgc); + lua_setfield(L, -2, "__gc"); /* metatable.__gc = boxgc */ + } + lua_setmetatable(L, -2); + return resizebox(L, -1, newsize); +} + + /* ** check whether buffer is using a userdata on the stack as a temporary ** buffer @@ -444,11 +498,12 @@ LUALIB_API char *luaL_prepbuffsize (luaL_Buffer *B, size_t sz) { if (newsize < B->n || newsize - B->n < sz) luaL_error(L, "buffer too large"); /* create larger buffer */ - newbuff = (char *)lua_newuserdata(L, newsize * sizeof(char)); - /* move content to new buffer */ - memcpy(newbuff, B->b, B->n * sizeof(char)); if (buffonstack(B)) - lua_remove(L, -2); /* remove old buffer */ + newbuff = (char *)resizebox(L, -1, newsize); + else { /* no buffer yet */ + newbuff = (char *)newbox(L, newsize); + memcpy(newbuff, B->b, B->n * sizeof(char)); /* copy original content */ + } B->b = newbuff; B->size = newsize; } @@ -457,9 +512,11 @@ LUALIB_API char *luaL_prepbuffsize (luaL_Buffer *B, size_t sz) { LUALIB_API void luaL_addlstring (luaL_Buffer *B, const char *s, size_t l) { - char *b = luaL_prepbuffsize(B, l); - memcpy(b, s, l * sizeof(char)); - luaL_addsize(B, l); + if (l > 0) { /* avoid 'memcpy' when 's' can be NULL */ + char *b = luaL_prepbuffsize(B, l); + memcpy(b, s, l * sizeof(char)); + luaL_addsize(B, l); + } } @@ -471,8 +528,10 @@ LUALIB_API void luaL_addstring (luaL_Buffer *B, const char *s) { LUALIB_API void luaL_pushresult (luaL_Buffer *B) { lua_State *L = B->L; lua_pushlstring(L, B->b, B->n); - if (buffonstack(B)) - lua_remove(L, -2); /* remove old buffer */ + if (buffonstack(B)) { + resizebox(L, -2, 0); /* delete old buffer */ + lua_remove(L, -2); /* remove its header from the stack */ + } } @@ -523,7 +582,7 @@ LUALIB_API int luaL_ref (lua_State *L, int t) { int ref; if (lua_isnil(L, -1)) { lua_pop(L, 1); /* remove from stack */ - return LUA_REFNIL; /* `nil' has a unique fixed reference */ + return LUA_REFNIL; /* 'nil' has a unique fixed reference */ } t = lua_absindex(L, t); lua_rawgeti(L, t, freelist); /* get first free element */ @@ -562,7 +621,7 @@ LUALIB_API void luaL_unref (lua_State *L, int t, int ref) { typedef struct LoadF { int n; /* number of pre-read characters */ FILE *f; /* file being read */ - char buff[LUAL_BUFFERSIZE]; /* area for reading file */ + char buff[BUFSIZ]; /* area for reading file */ } LoadF; @@ -594,7 +653,7 @@ static int errfile (lua_State *L, const char *what, int fnameindex) { static int skipBOM (LoadF *lf) { - const char *p = "\xEF\xBB\xBF"; /* Utf8 BOM mark */ + const char *p = "\xEF\xBB\xBF"; /* UTF-8 BOM mark */ int c; lf->n = 0; do { @@ -655,7 +714,7 @@ LUALIB_API int luaL_loadfilex (lua_State *L, const char *filename, readstatus = ferror(lf.f); if (filename) fclose(lf.f); /* close file (even in case of errors) */ if (readstatus) { - lua_settop(L, fnameindex); /* ignore results from `lua_load' */ + lua_settop(L, fnameindex); /* ignore results from 'lua_load' */ return errfile(L, "read", fnameindex); } lua_remove(L, fnameindex); @@ -698,23 +757,23 @@ LUALIB_API int luaL_loadstring (lua_State *L, const char *s) { 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; - } + return LUA_TNIL; else { - lua_remove(L, -2); /* remove only metatable */ - return 1; + int tt; + lua_pushstring(L, event); + tt = lua_rawget(L, -2); + if (tt == LUA_TNIL) /* is metafield nil? */ + lua_pop(L, 2); /* remove metatable and metafield */ + else + lua_remove(L, -2); /* remove only metatable */ + return tt; /* return metafield type */ } } LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) { obj = lua_absindex(L, obj); - if (!luaL_getmetafield(L, obj, event)) /* no metafield? */ + if (luaL_getmetafield(L, obj, event) == LUA_TNIL) /* no metafield? */ return 0; lua_pushvalue(L, obj); lua_call(L, 1, 1); @@ -722,13 +781,13 @@ LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) { } -LUALIB_API int luaL_len (lua_State *L, int idx) { - int l; +LUALIB_API lua_Integer luaL_len (lua_State *L, int idx) { + lua_Integer l; int isnum; lua_len(L, idx); - l = (int)lua_tointegerx(L, -1, &isnum); + l = lua_tointegerx(L, -1, &isnum); if (!isnum) - luaL_error(L, "object length is not a number"); + luaL_error(L, "object length is not an integer"); lua_pop(L, 1); /* remove object */ return l; } @@ -737,7 +796,13 @@ LUALIB_API int luaL_len (lua_State *L, int idx) { LUALIB_API const char *luaL_tolstring (lua_State *L, int idx, size_t *len) { if (!luaL_callmeta(L, idx, "__tostring")) { /* no metafield? */ switch (lua_type(L, idx)) { - case LUA_TNUMBER: + case LUA_TNUMBER: { + if (lua_isinteger(L, idx)) + lua_pushfstring(L, "%I", lua_tointeger(L, idx)); + else + lua_pushfstring(L, "%f", lua_tonumber(L, idx)); + break; + } case LUA_TSTRING: lua_pushvalue(L, idx); break; @@ -772,8 +837,7 @@ static const char *luaL_findtable (lua_State *L, int idx, e = strchr(fname, '.'); if (e == NULL) e = fname + strlen(fname); lua_pushlstring(L, fname, e - fname); - lua_rawget(L, -2); - if (lua_isnil(L, -1)) { /* no such field? */ + if (lua_rawget(L, -2) == LUA_TNIL) { /* no such field? */ lua_pop(L, 1); /* remove this nil */ lua_createtable(L, 0, (*e == '.' ? 1 : szhint)); /* new table for field */ lua_pushlstring(L, fname, e - fname); @@ -810,13 +874,12 @@ static int libsize (const luaL_Reg *l) { LUALIB_API void luaL_pushmodule (lua_State *L, const char *modname, int sizehint) { luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED", 1); /* get _LOADED table */ - lua_getfield(L, -1, modname); /* get _LOADED[modname] */ - if (!lua_istable(L, -1)) { /* not found? */ + if (lua_getfield(L, -1, modname) != LUA_TTABLE) { /* no _LOADED[modname]? */ lua_pop(L, 1); /* remove previous result */ /* try global variable (and create one if it does not exist) */ lua_pushglobaltable(L); if (luaL_findtable(L, 0, modname, sizehint) != NULL) - luaL_error(L, "name conflict for module " LUA_QS, modname); + luaL_error(L, "name conflict for module '%s'", modname); lua_pushvalue(L, -1); lua_setfield(L, -3, modname); /* _LOADED[modname] = new table */ } @@ -846,7 +909,6 @@ LUALIB_API void luaL_openlib (lua_State *L, const char *libname, ** Returns with only the table at the stack. */ LUALIB_API void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) { - luaL_checkversion(L); luaL_checkstack(L, nup, "too many upvalues"); for (; l->name != NULL; l++) { /* fill the table with given functions */ int i; @@ -864,8 +926,8 @@ LUALIB_API void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) { ** into the stack */ LUALIB_API int luaL_getsubtable (lua_State *L, int idx, const char *fname) { - lua_getfield(L, idx, fname); - if (lua_istable(L, -1)) return 1; /* table already there */ + if (lua_getfield(L, idx, fname) == LUA_TTABLE) + return 1; /* table already there */ else { lua_pop(L, 1); /* remove previous result */ idx = lua_absindex(L, idx); @@ -878,22 +940,26 @@ LUALIB_API int luaL_getsubtable (lua_State *L, int idx, const char *fname) { /* -** stripped-down 'require'. Calls 'openf' to open a module, -** registers the result in 'package.loaded' table and, if 'glb' -** is true, also registers the result in the global table. +** Stripped-down 'require': After checking "loaded" table, calls 'openf' +** to open a module, registers the result in 'package.loaded' table and, +** if 'glb' is true, also registers the result in the global table. ** Leaves resulting module on the top. */ LUALIB_API void luaL_requiref (lua_State *L, const char *modname, lua_CFunction openf, int glb) { - lua_pushcfunction(L, openf); - lua_pushstring(L, modname); /* argument to open function */ - lua_call(L, 1, 1); /* open module */ luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED"); - lua_pushvalue(L, -2); /* make copy of module (call result) */ - lua_setfield(L, -2, modname); /* _LOADED[modname] = module */ - lua_pop(L, 1); /* remove _LOADED table */ + lua_getfield(L, -1, modname); /* _LOADED[modname] */ + if (!lua_toboolean(L, -1)) { /* package not already loaded? */ + lua_pop(L, 1); /* remove field */ + lua_pushcfunction(L, openf); + lua_pushstring(L, modname); /* argument to open function */ + lua_call(L, 1, 1); /* call 'openf' to open module */ + lua_pushvalue(L, -1); /* make copy of module (call result) */ + lua_setfield(L, -3, modname); /* _LOADED[modname] = module */ + } + lua_remove(L, -2); /* remove _LOADED table */ if (glb) { - lua_pushvalue(L, -1); /* copy of 'mod' */ + lua_pushvalue(L, -1); /* copy of module */ lua_setglobal(L, modname); /* _G[modname] = module */ } } @@ -908,7 +974,7 @@ LUALIB_API const char *luaL_gsub (lua_State *L, const char *s, const char *p, while ((wild = strstr(s, p)) != NULL) { luaL_addlstring(&b, s, wild - s); /* push prefix */ luaL_addstring(&b, r); /* push replacement in place of pattern */ - s = wild + l; /* continue after `p' */ + s = wild + l; /* continue after 'p' */ } luaL_addstring(&b, s); /* push last suffix */ luaL_pushresult(&b); @@ -928,8 +994,8 @@ static void *l_alloc (void *ud, void *ptr, size_t osize, size_t nsize) { static int panic (lua_State *L) { - luai_writestringerror("PANIC: unprotected error in call to Lua API (%s)\n", - lua_tostring(L, -1)); + lua_writestringerror("PANIC: unprotected error in call to Lua API (%s)\n", + lua_tostring(L, -1)); return 0; /* return to Lua to abort */ } @@ -941,19 +1007,14 @@ LUALIB_API lua_State *luaL_newstate (void) { } -LUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver) { +LUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver, size_t sz) { const lua_Number *v = lua_version(L); + if (sz != LUAL_NUMSIZES) /* check numeric types */ + luaL_error(L, "core and library have incompatible numeric types"); if (v != lua_version(NULL)) luaL_error(L, "multiple Lua VMs detected"); else if (*v != ver) luaL_error(L, "version mismatch: app. needs %f, Lua core provides %f", ver, *v); - /* check conversions number -> integer types */ - lua_pushnumber(L, -(lua_Number)0x1234); - if (lua_tointeger(L, -1) != -0x1234 || - lua_tounsigned(L, -1) != (lua_Unsigned)-0x1234) - luaL_error(L, "bad conversion number->int;" - " must recompile Lua with proper settings"); - lua_pop(L, 1); } |