/* | |
** $Id: loadlib.c,v 1.111.1.1 2013/04/12 18:48:47 roberto Exp $ | |
** Dynamic library loader for Lua | |
** See Copyright Notice in lua.h | |
** | |
** This module contains an implementation of loadlib for Unix systems | |
** that have dlfcn, an implementation for Windows, and a stub for other | |
** systems. | |
*/ | |
/* | |
** if needed, includes windows header before everything else | |
*/ | |
#if defined(_WIN32) && !defined(UEFI_C_SOURCE) && !defined(_DOS_WATCOM) | |
#include <windows.h> | |
#endif | |
#include <stdlib.h> | |
#include <string.h> | |
#define loadlib_c | |
#define LUA_LIB | |
#include "lua.h" | |
#include "lauxlib.h" | |
#include "lualib.h" | |
/* | |
** LUA_PATH and LUA_CPATH are the names of the environment | |
** variables that Lua check to set its paths. | |
*/ | |
#if !defined(LUA_PATH) | |
#define LUA_PATH "LUA_PATH" | |
#endif | |
#if !defined(LUA_CPATH) | |
#define LUA_CPATH "LUA_CPATH" | |
#endif | |
#define LUA_PATHSUFFIX "_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR | |
#define LUA_PATHVERSION LUA_PATH LUA_PATHSUFFIX | |
#define LUA_CPATHVERSION LUA_CPATH LUA_PATHSUFFIX | |
/* | |
** LUA_PATH_SEP is the character that separates templates in a path. | |
** LUA_PATH_MARK is the string that marks the substitution points in a | |
** template. | |
** LUA_EXEC_DIR in a Windows path is replaced by the executable's | |
** directory. | |
** LUA_IGMARK is a mark to ignore all before it when building the | |
** luaopen_ function name. | |
*/ | |
#if !defined (LUA_PATH_SEP) | |
#define LUA_PATH_SEP ";" | |
#endif | |
#if !defined (LUA_PATH_MARK) | |
#define LUA_PATH_MARK "?" | |
#endif | |
#if !defined (LUA_EXEC_DIR) | |
#define LUA_EXEC_DIR "!" | |
#endif | |
#if !defined (LUA_IGMARK) | |
#define LUA_IGMARK "-" | |
#endif | |
/* | |
** LUA_CSUBSEP is the character that replaces dots in submodule names | |
** when searching for a C loader. | |
** LUA_LSUBSEP is the character that replaces dots in submodule names | |
** when searching for a Lua loader. | |
*/ | |
#if !defined(LUA_CSUBSEP) | |
#define LUA_CSUBSEP LUA_DIRSEP | |
#endif | |
#if !defined(LUA_LSUBSEP) | |
#define LUA_LSUBSEP LUA_DIRSEP | |
#endif | |
/* prefix for open functions in C libraries */ | |
#define LUA_POF "luaopen_" | |
/* separator for open functions in C libraries */ | |
#define LUA_OFSEP "_" | |
/* table (in the registry) that keeps handles for all loaded C libraries */ | |
#define CLIBS "_CLIBS" | |
#define LIB_FAIL "open" | |
/* error codes for ll_loadfunc */ | |
#define ERRLIB 1 | |
#define ERRFUNC 2 | |
#define setprogdir(L) ((void)0) | |
/* | |
** system-dependent functions | |
*/ | |
static void ll_unloadlib (void *lib); | |
static void *ll_load (lua_State *L, const char *path, int seeglb); | |
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym); | |
#if defined(LUA_USE_DLOPEN) | |
/* | |
** {======================================================================== | |
** 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 void ll_unloadlib (void *lib) { | |
dlclose(lib); | |
} | |
static void *ll_load (lua_State *L, const char *path, int seeglb) { | |
void *lib = dlopen(path, RTLD_NOW | (seeglb ? RTLD_GLOBAL : RTLD_LOCAL)); | |
if (lib == NULL) lua_pushstring(L, dlerror()); | |
return lib; | |
} | |
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) { | |
lua_CFunction f = (lua_CFunction)dlsym(lib, sym); | |
if (f == NULL) lua_pushstring(L, dlerror()); | |
return f; | |
} | |
/* }====================================================== */ | |
#elif defined(LUA_DL_DLL) | |
/* | |
** {====================================================================== | |
** This is an implementation of loadlib for Windows using native functions. | |
** ======================================================================= | |
*/ | |
#undef setprogdir | |
/* | |
** optional flags for LoadLibraryEx | |
*/ | |
#if !defined(LUA_LLE_FLAGS) | |
#define LUA_LLE_FLAGS 0 | |
#endif | |
static void setprogdir (lua_State *L) { | |
char buff[MAX_PATH + 1]; | |
char *lb; | |
DWORD nsize = sizeof(buff)/sizeof(char); | |
DWORD n = GetModuleFileNameA(NULL, buff, nsize); | |
if (n == 0 || n == nsize || (lb = strrchr(buff, '\\')) == NULL) | |
luaL_error(L, "unable to get ModuleFileName"); | |
else { | |
*lb = '\0'; | |
luaL_gsub(L, lua_tostring(L, -1), LUA_EXEC_DIR, buff); | |
lua_remove(L, -2); /* remove original string */ | |
} | |
} | |
static void pusherror (lua_State *L) { | |
int error = GetLastError(); | |
char buffer[128]; | |
if (FormatMessageA(FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM, | |
NULL, error, 0, buffer, sizeof(buffer)/sizeof(char), NULL)) | |
lua_pushstring(L, buffer); | |
else | |
lua_pushfstring(L, "system error %d\n", error); | |
} | |
static void ll_unloadlib (void *lib) { | |
FreeLibrary((HMODULE)lib); | |
} | |
static void *ll_load (lua_State *L, const char *path, int seeglb) { | |
HMODULE lib = LoadLibraryExA(path, NULL, LUA_LLE_FLAGS); | |
(void)(seeglb); /* not used: symbols are 'global' by default */ | |
if (lib == NULL) pusherror(L); | |
return lib; | |
} | |
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) { | |
lua_CFunction f = (lua_CFunction)GetProcAddress((HMODULE)lib, sym); | |
if (f == NULL) pusherror(L); | |
return f; | |
} | |
/* }====================================================== */ | |
#else | |
/* | |
** {====================================================== | |
** Fallback for other systems | |
** ======================================================= | |
*/ | |
#undef LIB_FAIL | |
#define LIB_FAIL "absent" | |
#define DLMSG "dynamic libraries not enabled; check your Lua installation" | |
static void ll_unloadlib (void *lib) { | |
(void)(lib); /* not used */ | |
} | |
static void *ll_load (lua_State *L, const char *path, int seeglb) { | |
(void)(path); (void)(seeglb); /* not used */ | |
lua_pushliteral(L, DLMSG); | |
return NULL; | |
} | |
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) { | |
(void)(lib); (void)(sym); /* not used */ | |
lua_pushliteral(L, DLMSG); | |
return NULL; | |
} | |
/* }====================================================== */ | |
#endif | |
static void *ll_checkclib (lua_State *L, const char *path) { | |
void *plib; | |
lua_getfield(L, LUA_REGISTRYINDEX, CLIBS); | |
lua_getfield(L, -1, path); | |
plib = lua_touserdata(L, -1); /* plib = CLIBS[path] */ | |
lua_pop(L, 2); /* pop CLIBS table and 'plib' */ | |
return plib; | |
} | |
static void ll_addtoclib (lua_State *L, const char *path, void *plib) { | |
lua_getfield(L, LUA_REGISTRYINDEX, CLIBS); | |
lua_pushlightuserdata(L, plib); | |
lua_pushvalue(L, -1); | |
lua_setfield(L, -3, path); /* CLIBS[path] = plib */ | |
lua_rawseti(L, -2, luaL_len(L, -2) + 1); /* CLIBS[#CLIBS + 1] = plib */ | |
lua_pop(L, 1); /* pop CLIBS table */ | |
} | |
/* | |
** __gc tag method for CLIBS table: calls 'll_unloadlib' for all lib | |
** handles in list CLIBS | |
*/ | |
static int gctm (lua_State *L) { | |
int n = luaL_len(L, 1); | |
for (; n >= 1; n--) { /* for each handle, in reverse order */ | |
lua_rawgeti(L, 1, n); /* get handle CLIBS[n] */ | |
ll_unloadlib(lua_touserdata(L, -1)); | |
lua_pop(L, 1); /* pop handle */ | |
} | |
return 0; | |
} | |
static int ll_loadfunc (lua_State *L, const char *path, const char *sym) { | |
void *reg = ll_checkclib(L, path); /* check loaded C libraries */ | |
if (reg == NULL) { /* must load library? */ | |
reg = ll_load(L, path, *sym == '*'); | |
if (reg == NULL) return ERRLIB; /* unable to load library */ | |
ll_addtoclib(L, path, reg); | |
} | |
if (*sym == '*') { /* loading only library (no function)? */ | |
lua_pushboolean(L, 1); /* return 'true' */ | |
return 0; /* no errors */ | |
} | |
else { | |
lua_CFunction f = ll_sym(L, reg, sym); | |
if (f == NULL) | |
return ERRFUNC; /* unable to find function */ | |
lua_pushcfunction(L, f); /* else create new function */ | |
return 0; /* no errors */ | |
} | |
} | |
static int ll_loadlib (lua_State *L) { | |
const char *path = luaL_checkstring(L, 1); | |
const char *init = luaL_checkstring(L, 2); | |
int stat = ll_loadfunc(L, path, init); | |
if (stat == 0) /* no errors? */ | |
return 1; /* return the loaded function */ | |
else { /* error; error message is on stack top */ | |
lua_pushnil(L); | |
lua_insert(L, -2); | |
lua_pushstring(L, (stat == ERRLIB) ? LIB_FAIL : "init"); | |
return 3; /* return nil, error message, and where */ | |
} | |
} | |
/* | |
** {====================================================== | |
** 'require' function | |
** ======================================================= | |
*/ | |
static int readable (const char *filename) { | |
FILE *f = fopen(filename, "r"); /* try to open file */ | |
if (f == NULL) return 0; /* open failed */ | |
fclose(f); | |
return 1; | |
} | |
static const char *pushnexttemplate (lua_State *L, const char *path) { | |
const char *l; | |
while (*path == *LUA_PATH_SEP) path++; /* skip separators */ | |
if (*path == '\0') return NULL; /* no more templates */ | |
l = strchr(path, *LUA_PATH_SEP); /* find next separator */ | |
if (l == NULL) l = path + strlen(path); | |
lua_pushlstring(L, path, l - path); /* template */ | |
return l; | |
} | |
static const char *searchpath (lua_State *L, const char *name, | |
const char *path, | |
const char *sep, | |
const char *dirsep) { | |
luaL_Buffer msg; /* to build error message */ | |
luaL_buffinit(L, &msg); | |
if (*sep != '\0') /* non-empty separator? */ | |
name = luaL_gsub(L, name, sep, dirsep); /* replace it by 'dirsep' */ | |
while ((path = pushnexttemplate(L, path)) != NULL) { | |
const char *filename = luaL_gsub(L, lua_tostring(L, -1), | |
LUA_PATH_MARK, name); | |
lua_remove(L, -2); /* remove path template */ | |
if (readable(filename)) /* does file exist and is readable? */ | |
return filename; /* return that file name */ | |
lua_pushfstring(L, "\n\tno file " LUA_QS, filename); | |
lua_remove(L, -2); /* remove file name */ | |
luaL_addvalue(&msg); /* concatenate error msg. entry */ | |
} | |
luaL_pushresult(&msg); /* create error message */ | |
return NULL; /* not found */ | |
} | |
static int ll_searchpath (lua_State *L) { | |
const char *f = searchpath(L, luaL_checkstring(L, 1), | |
luaL_checkstring(L, 2), | |
luaL_optstring(L, 3, "."), | |
luaL_optstring(L, 4, LUA_DIRSEP)); | |
if (f != NULL) return 1; | |
else { /* error message is on top of the stack */ | |
lua_pushnil(L); | |
lua_insert(L, -2); | |
return 2; /* return nil + error message */ | |
} | |
} | |
static const char *findfile (lua_State *L, const char *name, | |
const char *pname, | |
const char *dirsep) { | |
const char *path; | |
lua_getfield(L, lua_upvalueindex(1), pname); | |
path = lua_tostring(L, -1); | |
if (path == NULL) | |
luaL_error(L, LUA_QL("package.%s") " must be a string", pname); | |
return searchpath(L, name, path, ".", dirsep); | |
} | |
static int checkload (lua_State *L, int stat, const char *filename) { | |
if (stat) { /* module loaded successfully? */ | |
lua_pushstring(L, filename); /* will be 2nd argument to module */ | |
return 2; /* return open function and file name */ | |
} | |
else | |
return luaL_error(L, "error loading module " LUA_QS | |
" from file " LUA_QS ":\n\t%s", | |
lua_tostring(L, 1), filename, lua_tostring(L, -1)); | |
} | |
static int searcher_Lua (lua_State *L) { | |
const char *filename; | |
const char *name = luaL_checkstring(L, 1); | |
filename = findfile(L, name, "path", LUA_LSUBSEP); | |
if (filename == NULL) return 1; /* module not found in this path */ | |
return checkload(L, (luaL_loadfile(L, filename) == LUA_OK), filename); | |
} | |
static int loadfunc (lua_State *L, const char *filename, const char *modname) { | |
const char *funcname; | |
const char *mark; | |
modname = luaL_gsub(L, modname, ".", LUA_OFSEP); | |
mark = strchr(modname, *LUA_IGMARK); | |
if (mark) { | |
int stat; | |
funcname = lua_pushlstring(L, modname, mark - modname); | |
funcname = lua_pushfstring(L, LUA_POF"%s", funcname); | |
stat = ll_loadfunc(L, filename, funcname); | |
if (stat != ERRFUNC) return stat; | |
modname = mark + 1; /* else go ahead and try old-style name */ | |
} | |
funcname = lua_pushfstring(L, LUA_POF"%s", modname); | |
return ll_loadfunc(L, filename, funcname); | |
} | |
static int searcher_C (lua_State *L) { | |
const char *name = luaL_checkstring(L, 1); | |
const char *filename = findfile(L, name, "cpath", LUA_CSUBSEP); | |
if (filename == NULL) return 1; /* module not found in this path */ | |
return checkload(L, (loadfunc(L, filename, name) == 0), filename); | |
} | |
static int searcher_Croot (lua_State *L) { | |
const char *filename; | |
const char *name = luaL_checkstring(L, 1); | |
const char *p = strchr(name, '.'); | |
int stat; | |
if (p == NULL) return 0; /* is root */ | |
lua_pushlstring(L, name, p - name); | |
filename = findfile(L, lua_tostring(L, -1), "cpath", LUA_CSUBSEP); | |
if (filename == NULL) return 1; /* root not found */ | |
if ((stat = loadfunc(L, filename, name)) != 0) { | |
if (stat != ERRFUNC) | |
return checkload(L, 0, filename); /* real error */ | |
else { /* open function not found */ | |
lua_pushfstring(L, "\n\tno module " LUA_QS " in file " LUA_QS, | |
name, filename); | |
return 1; | |
} | |
} | |
lua_pushstring(L, filename); /* will be 2nd argument to module */ | |
return 2; | |
} | |
static int searcher_preload (lua_State *L) { | |
const char *name = luaL_checkstring(L, 1); | |
lua_getfield(L, LUA_REGISTRYINDEX, "_PRELOAD"); | |
lua_getfield(L, -1, name); | |
if (lua_isnil(L, -1)) /* not found? */ | |
lua_pushfstring(L, "\n\tno field package.preload['%s']", name); | |
return 1; | |
} | |
static void findloader (lua_State *L, const char *name) { | |
int i; | |
luaL_Buffer msg; /* to build error message */ | |
luaL_buffinit(L, &msg); | |
lua_getfield(L, lua_upvalueindex(1), "searchers"); /* will be at index 3 */ | |
if (!lua_istable(L, 3)) | |
luaL_error(L, LUA_QL("package.searchers") " must be a table"); | |
/* iterate over available searchers to find a loader */ | |
for (i = 1; ; i++) { | |
lua_rawgeti(L, 3, i); /* get a searcher */ | |
if (lua_isnil(L, -1)) { /* no more searchers? */ | |
lua_pop(L, 1); /* remove nil */ | |
luaL_pushresult(&msg); /* create error message */ | |
luaL_error(L, "module " LUA_QS " not found:%s", | |
name, lua_tostring(L, -1)); | |
} | |
lua_pushstring(L, name); | |
lua_call(L, 1, 2); /* call it */ | |
if (lua_isfunction(L, -2)) /* did it find a loader? */ | |
return; /* module loader found */ | |
else if (lua_isstring(L, -2)) { /* searcher returned error message? */ | |
lua_pop(L, 1); /* remove extra return */ | |
luaL_addvalue(&msg); /* concatenate error message */ | |
} | |
else | |
lua_pop(L, 2); /* remove both returns */ | |
} | |
} | |
static int ll_require (lua_State *L) { | |
const char *name = luaL_checkstring(L, 1); | |
lua_settop(L, 1); /* _LOADED table will be at index 2 */ | |
lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED"); | |
lua_getfield(L, 2, name); /* _LOADED[name] */ | |
if (lua_toboolean(L, -1)) /* is it there? */ | |
return 1; /* package is already loaded */ | |
/* else must load package */ | |
lua_pop(L, 1); /* remove 'getfield' result */ | |
findloader(L, name); | |
lua_pushstring(L, name); /* pass name as argument to module loader */ | |
lua_insert(L, -2); /* name is 1st argument (before search data) */ | |
lua_call(L, 2, 1); /* run loader to load module */ | |
if (!lua_isnil(L, -1)) /* non-nil return? */ | |
lua_setfield(L, 2, name); /* _LOADED[name] = returned value */ | |
lua_getfield(L, 2, name); | |
if (lua_isnil(L, -1)) { /* module did not set a value? */ | |
lua_pushboolean(L, 1); /* use true as result */ | |
lua_pushvalue(L, -1); /* extra copy to be returned */ | |
lua_setfield(L, 2, name); /* _LOADED[name] = true */ | |
} | |
return 1; | |
} | |
/* }====================================================== */ | |
/* | |
** {====================================================== | |
** 'module' function | |
** ======================================================= | |
*/ | |
#if defined(LUA_COMPAT_MODULE) | |
/* | |
** changes the environment variable of calling function | |
*/ | |
static void set_env (lua_State *L) { | |
lua_Debug ar; | |
if (lua_getstack(L, 1, &ar) == 0 || | |
lua_getinfo(L, "f", &ar) == 0 || /* get calling function */ | |
lua_iscfunction(L, -1)) | |
luaL_error(L, LUA_QL("module") " not called from a Lua function"); | |
lua_pushvalue(L, -2); /* copy new environment table to top */ | |
lua_setupvalue(L, -2, 1); | |
lua_pop(L, 1); /* remove function */ | |
} | |
static void dooptions (lua_State *L, int n) { | |
int i; | |
for (i = 2; i <= n; i++) { | |
if (lua_isfunction(L, i)) { /* avoid 'calling' extra info. */ | |
lua_pushvalue(L, i); /* get option (a function) */ | |
lua_pushvalue(L, -2); /* module */ | |
lua_call(L, 1, 0); | |
} | |
} | |
} | |
static void modinit (lua_State *L, const char *modname) { | |
const char *dot; | |
lua_pushvalue(L, -1); | |
lua_setfield(L, -2, "_M"); /* module._M = module */ | |
lua_pushstring(L, modname); | |
lua_setfield(L, -2, "_NAME"); | |
dot = strrchr(modname, '.'); /* look for last dot in module name */ | |
if (dot == NULL) dot = modname; | |
else dot++; | |
/* set _PACKAGE as package name (full module name minus last part) */ | |
lua_pushlstring(L, modname, dot - modname); | |
lua_setfield(L, -2, "_PACKAGE"); | |
} | |
static int ll_module (lua_State *L) { | |
const char *modname = luaL_checkstring(L, 1); | |
int lastarg = lua_gettop(L); /* last parameter */ | |
luaL_pushmodule(L, modname, 1); /* get/create module table */ | |
/* check whether table already has a _NAME field */ | |
lua_getfield(L, -1, "_NAME"); | |
if (!lua_isnil(L, -1)) /* is table an initialized module? */ | |
lua_pop(L, 1); | |
else { /* no; initialize it */ | |
lua_pop(L, 1); | |
modinit(L, modname); | |
} | |
lua_pushvalue(L, -1); | |
set_env(L); | |
dooptions(L, lastarg); | |
return 1; | |
} | |
static int ll_seeall (lua_State *L) { | |
luaL_checktype(L, 1, LUA_TTABLE); | |
if (!lua_getmetatable(L, 1)) { | |
lua_createtable(L, 0, 1); /* create new metatable */ | |
lua_pushvalue(L, -1); | |
lua_setmetatable(L, 1); | |
} | |
lua_pushglobaltable(L); | |
lua_setfield(L, -2, "__index"); /* mt.__index = _G */ | |
return 0; | |
} | |
#endif | |
/* }====================================================== */ | |
/* auxiliary mark (for internal use) */ | |
#define AUXMARK "\1" | |
/* | |
** return registry.LUA_NOENV as a boolean | |
*/ | |
static int noenv (lua_State *L) { | |
int b; | |
lua_getfield(L, LUA_REGISTRYINDEX, "LUA_NOENV"); | |
b = lua_toboolean(L, -1); | |
lua_pop(L, 1); /* remove value */ | |
return b; | |
} | |
static void setpath (lua_State *L, const char *fieldname, const char *envname1, | |
const char *envname2, const char *def) { | |
const char *path = getenv(envname1); | |
if (path == NULL) /* no environment variable? */ | |
path = getenv(envname2); /* try alternative name */ | |
if (path == NULL || noenv(L)) /* no environment variable? */ | |
lua_pushstring(L, def); /* use default */ | |
else { | |
/* replace ";;" by ";AUXMARK;" and then AUXMARK by default path */ | |
path = luaL_gsub(L, path, LUA_PATH_SEP LUA_PATH_SEP, | |
LUA_PATH_SEP AUXMARK LUA_PATH_SEP); | |
luaL_gsub(L, path, AUXMARK, def); | |
lua_remove(L, -2); | |
} | |
setprogdir(L); | |
lua_setfield(L, -2, fieldname); | |
} | |
static const luaL_Reg pk_funcs[] = { | |
{"loadlib", ll_loadlib}, | |
{"searchpath", ll_searchpath}, | |
#if defined(LUA_COMPAT_MODULE) | |
{"seeall", ll_seeall}, | |
#endif | |
{NULL, NULL} | |
}; | |
static const luaL_Reg ll_funcs[] = { | |
#if defined(LUA_COMPAT_MODULE) | |
{"module", ll_module}, | |
#endif | |
{"require", ll_require}, | |
{NULL, NULL} | |
}; | |
static void createsearcherstable (lua_State *L) { | |
static const lua_CFunction searchers[] = | |
{searcher_preload, searcher_Lua, searcher_C, searcher_Croot, NULL}; | |
int i; | |
/* create 'searchers' table */ | |
lua_createtable(L, sizeof(searchers)/sizeof(searchers[0]) - 1, 0); | |
/* fill it with pre-defined searchers */ | |
for (i=0; searchers[i] != NULL; i++) { | |
lua_pushvalue(L, -2); /* set 'package' as upvalue for all searchers */ | |
lua_pushcclosure(L, searchers[i], 1); | |
lua_rawseti(L, -2, i+1); | |
} | |
} | |
LUAMOD_API int luaopen_package (lua_State *L) { | |
/* create table CLIBS to keep track of loaded C libraries */ | |
luaL_getsubtable(L, LUA_REGISTRYINDEX, CLIBS); | |
lua_createtable(L, 0, 1); /* metatable for CLIBS */ | |
lua_pushcfunction(L, gctm); | |
lua_setfield(L, -2, "__gc"); /* set finalizer for CLIBS table */ | |
lua_setmetatable(L, -2); | |
/* create `package' table */ | |
luaL_newlib(L, pk_funcs); | |
createsearcherstable(L); | |
#if defined(LUA_COMPAT_LOADERS) | |
lua_pushvalue(L, -1); /* make a copy of 'searchers' table */ | |
lua_setfield(L, -3, "loaders"); /* put it in field `loaders' */ | |
#endif | |
lua_setfield(L, -2, "searchers"); /* put it in field 'searchers' */ | |
/* set field 'path' */ | |
setpath(L, "path", LUA_PATHVERSION, LUA_PATH, LUA_PATH_DEFAULT); | |
/* set field 'cpath' */ | |
setpath(L, "cpath", LUA_CPATHVERSION, LUA_CPATH, LUA_CPATH_DEFAULT); | |
/* store config information */ | |
lua_pushliteral(L, LUA_DIRSEP "\n" LUA_PATH_SEP "\n" LUA_PATH_MARK "\n" | |
LUA_EXEC_DIR "\n" LUA_IGMARK "\n"); | |
lua_setfield(L, -2, "config"); | |
/* set field `loaded' */ | |
luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED"); | |
lua_setfield(L, -2, "loaded"); | |
/* set field `preload' */ | |
luaL_getsubtable(L, LUA_REGISTRYINDEX, "_PRELOAD"); | |
lua_setfield(L, -2, "preload"); | |
lua_pushglobaltable(L); | |
lua_pushvalue(L, -2); /* set 'package' as upvalue for next lib */ | |
luaL_setfuncs(L, ll_funcs, 1); /* open lib into global table */ | |
lua_pop(L, 1); /* pop global table */ | |
return 1; /* return 'package' table */ | |
} | |