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-rw-r--r--lib/lua/src/loadlib.c666
1 files changed, 0 insertions, 666 deletions
diff --git a/lib/lua/src/loadlib.c b/lib/lua/src/loadlib.c
deleted file mode 100644
index 0d401eba1..000000000
--- a/lib/lua/src/loadlib.c
+++ /dev/null
@@ -1,666 +0,0 @@
-/*
-** $Id: loadlib.c,v 1.52.1.3 2008/08/06 13:29:28 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, 0, sizeof(loaders)/sizeof(loaders[0]) - 1);
- /* 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 */
-}
-