mirror of https://github.com/axmolengine/axmol.git
667 lines
19 KiB
C
667 lines
19 KiB
C
/*
|
|
** $Id: loadlib.c,v 1.52.1.4 2009/09/09 13:17:16 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 Darwin (Mac OS X), an
|
|
** implementation for Windows, and a stub for other systems.
|
|
*/
|
|
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
|
|
#define loadlib_c
|
|
#define LUA_LIB
|
|
|
|
#include "lua.h"
|
|
|
|
#include "lauxlib.h"
|
|
#include "lualib.h"
|
|
|
|
|
|
/* prefix for open functions in C libraries */
|
|
#define LUA_POF "luaopen_"
|
|
|
|
/* separator for open functions in C libraries */
|
|
#define LUA_OFSEP "_"
|
|
|
|
|
|
#define LIBPREFIX "LOADLIB: "
|
|
|
|
#define POF LUA_POF
|
|
#define LIB_FAIL "open"
|
|
|
|
|
|
/* error codes for ll_loadfunc */
|
|
#define ERRLIB 1
|
|
#define ERRFUNC 2
|
|
|
|
#define setprogdir(L) ((void)0)
|
|
|
|
|
|
static void ll_unloadlib (void *lib);
|
|
static void *ll_load (lua_State *L, const char *path);
|
|
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym);
|
|
|
|
|
|
|
|
#if defined(LUA_DL_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) {
|
|
void *lib = dlopen(path, RTLD_NOW);
|
|
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.
|
|
** =======================================================================
|
|
*/
|
|
|
|
#include <windows.h>
|
|
|
|
|
|
#undef setprogdir
|
|
|
|
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_EXECDIR, 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), NULL))
|
|
lua_pushstring(L, buffer);
|
|
else
|
|
lua_pushfstring(L, "system error %d\n", error);
|
|
}
|
|
|
|
static void ll_unloadlib (void *lib) {
|
|
FreeLibrary((HINSTANCE)lib);
|
|
}
|
|
|
|
|
|
static void *ll_load (lua_State *L, const char *path) {
|
|
HINSTANCE lib = LoadLibraryA(path);
|
|
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((HINSTANCE)lib, sym);
|
|
if (f == NULL) pusherror(L);
|
|
return f;
|
|
}
|
|
|
|
/* }====================================================== */
|
|
|
|
|
|
|
|
#elif defined(LUA_DL_DYLD)
|
|
/*
|
|
** {======================================================================
|
|
** Native Mac OS X / Darwin Implementation
|
|
** =======================================================================
|
|
*/
|
|
|
|
#include <mach-o/dyld.h>
|
|
|
|
|
|
/* Mac appends a `_' before C function names */
|
|
#undef POF
|
|
#define POF "_" LUA_POF
|
|
|
|
|
|
static void pusherror (lua_State *L) {
|
|
const char *err_str;
|
|
const char *err_file;
|
|
NSLinkEditErrors err;
|
|
int err_num;
|
|
NSLinkEditError(&err, &err_num, &err_file, &err_str);
|
|
lua_pushstring(L, err_str);
|
|
}
|
|
|
|
|
|
static const char *errorfromcode (NSObjectFileImageReturnCode ret) {
|
|
switch (ret) {
|
|
case NSObjectFileImageInappropriateFile:
|
|
return "file is not a bundle";
|
|
case NSObjectFileImageArch:
|
|
return "library is for wrong CPU type";
|
|
case NSObjectFileImageFormat:
|
|
return "bad format";
|
|
case NSObjectFileImageAccess:
|
|
return "cannot access file";
|
|
case NSObjectFileImageFailure:
|
|
default:
|
|
return "unable to load library";
|
|
}
|
|
}
|
|
|
|
|
|
static void ll_unloadlib (void *lib) {
|
|
NSUnLinkModule((NSModule)lib, NSUNLINKMODULE_OPTION_RESET_LAZY_REFERENCES);
|
|
}
|
|
|
|
|
|
static void *ll_load (lua_State *L, const char *path) {
|
|
NSObjectFileImage img;
|
|
NSObjectFileImageReturnCode ret;
|
|
/* this would be a rare case, but prevents crashing if it happens */
|
|
if(!_dyld_present()) {
|
|
lua_pushliteral(L, "dyld not present");
|
|
return NULL;
|
|
}
|
|
ret = NSCreateObjectFileImageFromFile(path, &img);
|
|
if (ret == NSObjectFileImageSuccess) {
|
|
NSModule mod = NSLinkModule(img, path, NSLINKMODULE_OPTION_PRIVATE |
|
|
NSLINKMODULE_OPTION_RETURN_ON_ERROR);
|
|
NSDestroyObjectFileImage(img);
|
|
if (mod == NULL) pusherror(L);
|
|
return mod;
|
|
}
|
|
lua_pushstring(L, errorfromcode(ret));
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
|
|
NSSymbol nss = NSLookupSymbolInModule((NSModule)lib, sym);
|
|
if (nss == NULL) {
|
|
lua_pushfstring(L, "symbol " LUA_QS " not found", sym);
|
|
return NULL;
|
|
}
|
|
return (lua_CFunction)NSAddressOfSymbol(nss);
|
|
}
|
|
|
|
/* }====================================================== */
|
|
|
|
|
|
|
|
#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; /* to avoid warnings */
|
|
}
|
|
|
|
|
|
static void *ll_load (lua_State *L, const char *path) {
|
|
(void)path; /* to avoid warnings */
|
|
lua_pushliteral(L, DLMSG);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
|
|
(void)lib; (void)sym; /* to avoid warnings */
|
|
lua_pushliteral(L, DLMSG);
|
|
return NULL;
|
|
}
|
|
|
|
/* }====================================================== */
|
|
#endif
|
|
|
|
|
|
|
|
static void **ll_register (lua_State *L, const char *path) {
|
|
void **plib;
|
|
lua_pushfstring(L, "%s%s", LIBPREFIX, path);
|
|
lua_gettable(L, LUA_REGISTRYINDEX); /* check library in registry? */
|
|
if (!lua_isnil(L, -1)) /* is there an entry? */
|
|
plib = (void **)lua_touserdata(L, -1);
|
|
else { /* no entry yet; create one */
|
|
lua_pop(L, 1);
|
|
plib = (void **)lua_newuserdata(L, sizeof(const void *));
|
|
*plib = NULL;
|
|
luaL_getmetatable(L, "_LOADLIB");
|
|
lua_setmetatable(L, -2);
|
|
lua_pushfstring(L, "%s%s", LIBPREFIX, path);
|
|
lua_pushvalue(L, -2);
|
|
lua_settable(L, LUA_REGISTRYINDEX);
|
|
}
|
|
return plib;
|
|
}
|
|
|
|
|
|
/*
|
|
** __gc tag method: calls library's `ll_unloadlib' function with the lib
|
|
** handle
|
|
*/
|
|
static int gctm (lua_State *L) {
|
|
void **lib = (void **)luaL_checkudata(L, 1, "_LOADLIB");
|
|
if (*lib) ll_unloadlib(*lib);
|
|
*lib = NULL; /* mark library as closed */
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int ll_loadfunc (lua_State *L, const char *path, const char *sym) {
|
|
void **reg = ll_register(L, path);
|
|
if (*reg == NULL) *reg = ll_load(L, path);
|
|
if (*reg == NULL)
|
|
return ERRLIB; /* unable to load library */
|
|
else {
|
|
lua_CFunction f = ll_sym(L, *reg, sym);
|
|
if (f == NULL)
|
|
return ERRFUNC; /* unable to find function */
|
|
lua_pushcfunction(L, f);
|
|
return 0; /* return function */
|
|
}
|
|
}
|
|
|
|
|
|
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_PATHSEP) path++; /* skip separators */
|
|
if (*path == '\0') return NULL; /* no more templates */
|
|
l = strchr(path, *LUA_PATHSEP); /* find next separator */
|
|
if (l == NULL) l = path + strlen(path);
|
|
lua_pushlstring(L, path, l - path); /* template */
|
|
return l;
|
|
}
|
|
|
|
|
|
static const char *findfile (lua_State *L, const char *name,
|
|
const char *pname) {
|
|
const char *path;
|
|
name = luaL_gsub(L, name, ".", LUA_DIRSEP);
|
|
lua_getfield(L, LUA_ENVIRONINDEX, pname);
|
|
path = lua_tostring(L, -1);
|
|
if (path == NULL)
|
|
luaL_error(L, LUA_QL("package.%s") " must be a string", pname);
|
|
lua_pushliteral(L, ""); /* error accumulator */
|
|
while ((path = pushnexttemplate(L, path)) != NULL) {
|
|
const char *filename;
|
|
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 */
|
|
lua_concat(L, 2); /* add entry to possible error message */
|
|
}
|
|
return NULL; /* not found */
|
|
}
|
|
|
|
|
|
static void loaderror (lua_State *L, const char *filename) {
|
|
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 loader_Lua (lua_State *L) {
|
|
const char *filename;
|
|
const char *name = luaL_checkstring(L, 1);
|
|
filename = findfile(L, name, "path");
|
|
if (filename == NULL) return 1; /* library not found in this path */
|
|
if (luaL_loadfile(L, filename) != 0)
|
|
loaderror(L, filename);
|
|
return 1; /* library loaded successfully */
|
|
}
|
|
|
|
|
|
static const char *mkfuncname (lua_State *L, const char *modname) {
|
|
const char *funcname;
|
|
const char *mark = strchr(modname, *LUA_IGMARK);
|
|
if (mark) modname = mark + 1;
|
|
funcname = luaL_gsub(L, modname, ".", LUA_OFSEP);
|
|
funcname = lua_pushfstring(L, POF"%s", funcname);
|
|
lua_remove(L, -2); /* remove 'gsub' result */
|
|
return funcname;
|
|
}
|
|
|
|
|
|
static int loader_C (lua_State *L) {
|
|
const char *funcname;
|
|
const char *name = luaL_checkstring(L, 1);
|
|
const char *filename = findfile(L, name, "cpath");
|
|
if (filename == NULL) return 1; /* library not found in this path */
|
|
funcname = mkfuncname(L, name);
|
|
if (ll_loadfunc(L, filename, funcname) != 0)
|
|
loaderror(L, filename);
|
|
return 1; /* library loaded successfully */
|
|
}
|
|
|
|
|
|
static int loader_Croot (lua_State *L) {
|
|
const char *funcname;
|
|
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");
|
|
if (filename == NULL) return 1; /* root not found */
|
|
funcname = mkfuncname(L, name);
|
|
if ((stat = ll_loadfunc(L, filename, funcname)) != 0) {
|
|
if (stat != ERRFUNC) loaderror(L, filename); /* real error */
|
|
lua_pushfstring(L, "\n\tno module " LUA_QS " in file " LUA_QS,
|
|
name, filename);
|
|
return 1; /* function not found */
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|
|
static int loader_preload (lua_State *L) {
|
|
const char *name = luaL_checkstring(L, 1);
|
|
lua_getfield(L, LUA_ENVIRONINDEX, "preload");
|
|
if (!lua_istable(L, -1))
|
|
luaL_error(L, LUA_QL("package.preload") " must be a table");
|
|
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 const int sentinel_ = 0;
|
|
#define sentinel ((void *)&sentinel_)
|
|
|
|
|
|
static int ll_require (lua_State *L) {
|
|
const char *name = luaL_checkstring(L, 1);
|
|
int i;
|
|
lua_settop(L, 1); /* _LOADED table will be at index 2 */
|
|
lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
|
|
lua_getfield(L, 2, name);
|
|
if (lua_toboolean(L, -1)) { /* is it there? */
|
|
if (lua_touserdata(L, -1) == sentinel) /* check loops */
|
|
luaL_error(L, "loop or previous error loading module " LUA_QS, name);
|
|
return 1; /* package is already loaded */
|
|
}
|
|
/* else must load it; iterate over available loaders */
|
|
lua_getfield(L, LUA_ENVIRONINDEX, "loaders");
|
|
if (!lua_istable(L, -1))
|
|
luaL_error(L, LUA_QL("package.loaders") " must be a table");
|
|
lua_pushliteral(L, ""); /* error message accumulator */
|
|
for (i=1; ; i++) {
|
|
lua_rawgeti(L, -2, i); /* get a loader */
|
|
if (lua_isnil(L, -1))
|
|
luaL_error(L, "module " LUA_QS " not found:%s",
|
|
name, lua_tostring(L, -2));
|
|
lua_pushstring(L, name);
|
|
lua_call(L, 1, 1); /* call it */
|
|
if (lua_isfunction(L, -1)) /* did it find module? */
|
|
break; /* module loaded successfully */
|
|
else if (lua_isstring(L, -1)) /* loader returned error message? */
|
|
lua_concat(L, 2); /* accumulate it */
|
|
else
|
|
lua_pop(L, 1);
|
|
}
|
|
lua_pushlightuserdata(L, sentinel);
|
|
lua_setfield(L, 2, name); /* _LOADED[name] = sentinel */
|
|
lua_pushstring(L, name); /* pass name as argument to module */
|
|
lua_call(L, 1, 1); /* run loaded 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_touserdata(L, -1) == sentinel) { /* 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
|
|
** =======================================================
|
|
*/
|
|
|
|
|
|
static void setfenv (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);
|
|
lua_setfenv(L, -2);
|
|
lua_pop(L, 1);
|
|
}
|
|
|
|
|
|
static void dooptions (lua_State *L, int n) {
|
|
int i;
|
|
for (i = 2; i <= n; i++) {
|
|
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 loaded = lua_gettop(L) + 1; /* index of _LOADED table */
|
|
lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
|
|
lua_getfield(L, loaded, modname); /* get _LOADED[modname] */
|
|
if (!lua_istable(L, -1)) { /* not found? */
|
|
lua_pop(L, 1); /* remove previous result */
|
|
/* try global variable (and create one if it does not exist) */
|
|
if (luaL_findtable(L, LUA_GLOBALSINDEX, modname, 1) != NULL)
|
|
return luaL_error(L, "name conflict for module " LUA_QS, modname);
|
|
lua_pushvalue(L, -1);
|
|
lua_setfield(L, loaded, modname); /* _LOADED[modname] = new 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);
|
|
setfenv(L);
|
|
dooptions(L, loaded - 1);
|
|
return 0;
|
|
}
|
|
|
|
|
|
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_pushvalue(L, LUA_GLOBALSINDEX);
|
|
lua_setfield(L, -2, "__index"); /* mt.__index = _G */
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* }====================================================== */
|
|
|
|
|
|
|
|
/* auxiliary mark (for internal use) */
|
|
#define AUXMARK "\1"
|
|
|
|
static void setpath (lua_State *L, const char *fieldname, const char *envname,
|
|
const char *def) {
|
|
const char *path = getenv(envname);
|
|
if (path == NULL) /* 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_PATHSEP LUA_PATHSEP,
|
|
LUA_PATHSEP AUXMARK LUA_PATHSEP);
|
|
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},
|
|
{"seeall", ll_seeall},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
|
|
static const luaL_Reg ll_funcs[] = {
|
|
{"module", ll_module},
|
|
{"require", ll_require},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
|
|
static const lua_CFunction loaders[] =
|
|
{loader_preload, loader_Lua, loader_C, loader_Croot, NULL};
|
|
|
|
|
|
LUALIB_API int luaopen_package (lua_State *L) {
|
|
int i;
|
|
/* create new type _LOADLIB */
|
|
luaL_newmetatable(L, "_LOADLIB");
|
|
lua_pushcfunction(L, gctm);
|
|
lua_setfield(L, -2, "__gc");
|
|
/* create `package' table */
|
|
luaL_register(L, LUA_LOADLIBNAME, pk_funcs);
|
|
#if defined(LUA_COMPAT_LOADLIB)
|
|
lua_getfield(L, -1, "loadlib");
|
|
lua_setfield(L, LUA_GLOBALSINDEX, "loadlib");
|
|
#endif
|
|
lua_pushvalue(L, -1);
|
|
lua_replace(L, LUA_ENVIRONINDEX);
|
|
/* create `loaders' table */
|
|
lua_createtable(L, sizeof(loaders)/sizeof(loaders[0]) - 1, 0);
|
|
/* fill it with pre-defined loaders */
|
|
for (i=0; loaders[i] != NULL; i++) {
|
|
lua_pushcfunction(L, loaders[i]);
|
|
lua_rawseti(L, -2, i+1);
|
|
}
|
|
lua_setfield(L, -2, "loaders"); /* put it in field `loaders' */
|
|
setpath(L, "path", LUA_PATH, LUA_PATH_DEFAULT); /* set field `path' */
|
|
setpath(L, "cpath", LUA_CPATH, LUA_CPATH_DEFAULT); /* set field `cpath' */
|
|
/* store config information */
|
|
lua_pushliteral(L, LUA_DIRSEP "\n" LUA_PATHSEP "\n" LUA_PATH_MARK "\n"
|
|
LUA_EXECDIR "\n" LUA_IGMARK);
|
|
lua_setfield(L, -2, "config");
|
|
/* set field `loaded' */
|
|
luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED", 2);
|
|
lua_setfield(L, -2, "loaded");
|
|
/* set field `preload' */
|
|
lua_newtable(L);
|
|
lua_setfield(L, -2, "preload");
|
|
lua_pushvalue(L, LUA_GLOBALSINDEX);
|
|
luaL_register(L, NULL, ll_funcs); /* open lib into global table */
|
|
lua_pop(L, 1);
|
|
return 1; /* return 'package' table */
|
|
}
|
|
|