diff options
Diffstat (limited to '3rdparty/lua/src/lib_package.c')
| -rw-r--r-- | 3rdparty/lua/src/lib_package.c | 1207 |
1 files changed, 602 insertions, 605 deletions
diff --git a/3rdparty/lua/src/lib_package.c b/3rdparty/lua/src/lib_package.c index f0e672d..8d9f030 100644 --- a/3rdparty/lua/src/lib_package.c +++ b/3rdparty/lua/src/lib_package.c @@ -1,605 +1,602 @@ -/* -** Package library. -** Copyright (C) 2005-2013 Mike Pall. See Copyright Notice in luajit.h -** -** Major portions taken verbatim or adapted from the Lua interpreter. -** Copyright (C) 1994-2012 Lua.org, PUC-Rio. See Copyright Notice in lua.h -*/ - -#define lib_package_c -#define LUA_LIB - -#include "lua.h" -#include "lauxlib.h" -#include "lualib.h" - -#include "lj_obj.h" -#include "lj_err.h" -#include "lj_lib.h" - -/* ------------------------------------------------------------------------ */ - -/* Error codes for ll_loadfunc. */ -#define PACKAGE_ERR_LIB 1 -#define PACKAGE_ERR_FUNC 2 -#define PACKAGE_ERR_LOAD 3 - -/* Redefined in platform specific part. */ -#define PACKAGE_LIB_FAIL "open" -#define setprogdir(L) ((void)0) - -/* Symbol name prefixes. */ -#define SYMPREFIX_CF "luaopen_%s" -#define SYMPREFIX_BC "luaJIT_BC_%s" - -#if LJ_TARGET_DLOPEN - -#include <dlfcn.h> - -static void ll_unloadlib(void *lib) -{ - dlclose(lib); -} - -static void *ll_load(lua_State *L, const char *path, int gl) -{ - void *lib = dlopen(path, RTLD_NOW | (gl ? 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; -} - -static const char *ll_bcsym(void *lib, const char *sym) -{ -#if defined(RTLD_DEFAULT) - if (lib == NULL) lib = RTLD_DEFAULT; -#elif LJ_TARGET_OSX || LJ_TARGET_BSD - if (lib == NULL) lib = (void *)(intptr_t)-2; -#endif - return (const char *)dlsym(lib, sym); -} - -#elif LJ_TARGET_WINDOWS - -#define WIN32_LEAN_AND_MEAN -#ifndef WINVER -#define WINVER 0x0500 -#endif -#include <windows.h> - -#ifndef GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS -#define GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS 4 -#define GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT 2 -BOOL WINAPI GetModuleHandleExA(DWORD, LPCSTR, HMODULE*); -#endif - -#undef setprogdir - -static void setprogdir(lua_State *L) -{ - char buff[MAX_PATH + 1]; - char *lb; - DWORD nsize = sizeof(buff); - 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) -{ - DWORD 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, int gl) -{ - HINSTANCE lib = LoadLibraryA(path); - if (lib == NULL) pusherror(L); - UNUSED(gl); - 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; -} - -static const char *ll_bcsym(void *lib, const char *sym) -{ - if (lib) { - return (const char *)GetProcAddress((HINSTANCE)lib, sym); - } else { - HINSTANCE h = GetModuleHandleA(NULL); - const char *p = (const char *)GetProcAddress(h, sym); - if (p == NULL && GetModuleHandleExA(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS|GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, - (const char *)ll_bcsym, &h)) - p = (const char *)GetProcAddress(h, sym); - return p; - } -} - -#else - -#undef PACKAGE_LIB_FAIL -#define PACKAGE_LIB_FAIL "absent" - -#define DLMSG "dynamic libraries not enabled; no support for target OS" - -static void ll_unloadlib(void *lib) -{ - UNUSED(lib); -} - -static void *ll_load(lua_State *L, const char *path, int gl) -{ - UNUSED(path); UNUSED(gl); - lua_pushliteral(L, DLMSG); - return NULL; -} - -static lua_CFunction ll_sym(lua_State *L, void *lib, const char *sym) -{ - UNUSED(lib); UNUSED(sym); - lua_pushliteral(L, DLMSG); - return NULL; -} - -static const char *ll_bcsym(void *lib, const char *sym) -{ - UNUSED(lib); UNUSED(sym); - return NULL; -} - -#endif - -/* ------------------------------------------------------------------------ */ - -static void **ll_register(lua_State *L, const char *path) -{ - void **plib; - lua_pushfstring(L, "LOADLIB: %s", 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(void *)); - *plib = NULL; - luaL_getmetatable(L, "_LOADLIB"); - lua_setmetatable(L, -2); - lua_pushfstring(L, "LOADLIB: %s", path); - lua_pushvalue(L, -2); - lua_settable(L, LUA_REGISTRYINDEX); - } - return plib; -} - -static const char *mksymname(lua_State *L, const char *modname, - const char *prefix) -{ - const char *funcname; - const char *mark = strchr(modname, *LUA_IGMARK); - if (mark) modname = mark + 1; - funcname = luaL_gsub(L, modname, ".", "_"); - funcname = lua_pushfstring(L, prefix, funcname); - lua_remove(L, -2); /* remove 'gsub' result */ - return funcname; -} - -static int ll_loadfunc(lua_State *L, const char *path, const char *name, int r) -{ - void **reg = ll_register(L, path); - if (*reg == NULL) *reg = ll_load(L, path, (*name == '*')); - if (*reg == NULL) { - return PACKAGE_ERR_LIB; /* Unable to load library. */ - } else if (*name == '*') { /* Only load library into global namespace. */ - lua_pushboolean(L, 1); - return 0; - } else { - const char *sym = r ? name : mksymname(L, name, SYMPREFIX_CF); - lua_CFunction f = ll_sym(L, *reg, sym); - if (f) { - lua_pushcfunction(L, f); - return 0; - } - if (!r) { - const char *bcdata = ll_bcsym(*reg, mksymname(L, name, SYMPREFIX_BC)); - lua_pop(L, 1); - if (bcdata) { - if (luaL_loadbuffer(L, bcdata, ~(size_t)0, name) != 0) - return PACKAGE_ERR_LOAD; - return 0; - } - } - return PACKAGE_ERR_FUNC; /* Unable to find function. */ - } -} - -static int lj_cf_package_loadlib(lua_State *L) -{ - const char *path = luaL_checkstring(L, 1); - const char *init = luaL_checkstring(L, 2); - int st = ll_loadfunc(L, path, init, 1); - if (st == 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, (st == PACKAGE_ERR_LIB) ? PACKAGE_LIB_FAIL : "init"); - return 3; /* return nil, error message, and where */ - } -} - -static int lj_cf_package_unloadlib(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 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, (size_t)(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 lj_cf_package_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 *path; - 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); - return searchpath(L, name, path, ".", LUA_DIRSEP); -} - -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 lj_cf_package_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 int lj_cf_package_loader_c(lua_State *L) -{ - 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 */ - if (ll_loadfunc(L, filename, name, 0) != 0) - loaderror(L, filename); - return 1; /* library loaded successfully */ -} - -static int lj_cf_package_loader_croot(lua_State *L) -{ - const char *filename; - const char *name = luaL_checkstring(L, 1); - const char *p = strchr(name, '.'); - int st; - if (p == NULL) return 0; /* is root */ - lua_pushlstring(L, name, (size_t)(p - name)); - filename = findfile(L, lua_tostring(L, -1), "cpath"); - if (filename == NULL) return 1; /* root not found */ - if ((st = ll_loadfunc(L, filename, name, 0)) != 0) { - if (st != PACKAGE_ERR_FUNC) 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 lj_cf_package_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? */ - const char *bcname = mksymname(L, name, SYMPREFIX_BC); - const char *bcdata = ll_bcsym(NULL, bcname); - if (bcdata == NULL || luaL_loadbuffer(L, bcdata, ~(size_t)0, name) != 0) - lua_pushfstring(L, "\n\tno field package.preload['%s']", name); - } - return 1; -} - -/* ------------------------------------------------------------------------ */ - -static const int sentinel_ = 0; -#define sentinel ((void *)&sentinel_) - -static int lj_cf_package_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 */ - } - lj_lib_checkfpu(L); - return 1; -} - -/* ------------------------------------------------------------------------ */ - -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, (size_t)(dot - modname)); - lua_setfield(L, -2, "_PACKAGE"); -} - -static int lj_cf_package_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) - lj_err_callerv(L, LJ_ERR_BADMODN, 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 lj_cf_package_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; -} - -/* ------------------------------------------------------------------------ */ - -#define AUXMARK "\1" - -static void setpath(lua_State *L, const char *fieldname, const char *envname, - const char *def, int noenv) -{ -#if LJ_TARGET_CONSOLE - const char *path = NULL; - UNUSED(envname); -#else - const char *path = getenv(envname); -#endif - if (path == NULL || noenv) { - lua_pushstring(L, def); - } else { - 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 package_lib[] = { - { "loadlib", lj_cf_package_loadlib }, - { "searchpath", lj_cf_package_searchpath }, - { "seeall", lj_cf_package_seeall }, - { NULL, NULL } -}; - -static const luaL_Reg package_global[] = { - { "module", lj_cf_package_module }, - { "require", lj_cf_package_require }, - { NULL, NULL } -}; - -static const lua_CFunction package_loaders[] = -{ - lj_cf_package_loader_preload, - lj_cf_package_loader_lua, - lj_cf_package_loader_c, - lj_cf_package_loader_croot, - NULL -}; - -LUALIB_API int luaopen_package(lua_State *L) -{ - int i; - int noenv; - luaL_newmetatable(L, "_LOADLIB"); - lj_lib_pushcf(L, lj_cf_package_unloadlib, 1); - lua_setfield(L, -2, "__gc"); - luaL_register(L, LUA_LOADLIBNAME, package_lib); - lua_pushvalue(L, -1); - lua_replace(L, LUA_ENVIRONINDEX); - lua_createtable(L, sizeof(package_loaders)/sizeof(package_loaders[0])-1, 0); - for (i = 0; package_loaders[i] != NULL; i++) { - lj_lib_pushcf(L, package_loaders[i], 1); - lua_rawseti(L, -2, i+1); - } - lua_setfield(L, -2, "loaders"); - lua_getfield(L, LUA_REGISTRYINDEX, "LUA_NOENV"); - noenv = lua_toboolean(L, -1); - lua_pop(L, 1); - setpath(L, "path", LUA_PATH, LUA_PATH_DEFAULT, noenv); - setpath(L, "cpath", LUA_CPATH, LUA_CPATH_DEFAULT, noenv); - lua_pushliteral(L, LUA_PATH_CONFIG); - lua_setfield(L, -2, "config"); - luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED", 16); - lua_setfield(L, -2, "loaded"); - luaL_findtable(L, LUA_REGISTRYINDEX, "_PRELOAD", 4); - lua_setfield(L, -2, "preload"); - lua_pushvalue(L, LUA_GLOBALSINDEX); - luaL_register(L, NULL, package_global); - lua_pop(L, 1); - return 1; -} - +/*
+** Package library.
+** Copyright (C) 2005-2015 Mike Pall. See Copyright Notice in luajit.h
+**
+** Major portions taken verbatim or adapted from the Lua interpreter.
+** Copyright (C) 1994-2012 Lua.org, PUC-Rio. See Copyright Notice in lua.h
+*/
+
+#define lib_package_c
+#define LUA_LIB
+
+#include "lua.h"
+#include "lauxlib.h"
+#include "lualib.h"
+
+#include "lj_obj.h"
+#include "lj_err.h"
+#include "lj_lib.h"
+
+/* ------------------------------------------------------------------------ */
+
+/* Error codes for ll_loadfunc. */
+#define PACKAGE_ERR_LIB 1
+#define PACKAGE_ERR_FUNC 2
+#define PACKAGE_ERR_LOAD 3
+
+/* Redefined in platform specific part. */
+#define PACKAGE_LIB_FAIL "open"
+#define setprogdir(L) ((void)0)
+
+/* Symbol name prefixes. */
+#define SYMPREFIX_CF "luaopen_%s"
+#define SYMPREFIX_BC "luaJIT_BC_%s"
+
+#if LJ_TARGET_DLOPEN
+
+#include <dlfcn.h>
+
+static void ll_unloadlib(void *lib)
+{
+ dlclose(lib);
+}
+
+static void *ll_load(lua_State *L, const char *path, int gl)
+{
+ void *lib = dlopen(path, RTLD_NOW | (gl ? 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;
+}
+
+static const char *ll_bcsym(void *lib, const char *sym)
+{
+#if defined(RTLD_DEFAULT)
+ if (lib == NULL) lib = RTLD_DEFAULT;
+#elif LJ_TARGET_OSX || LJ_TARGET_BSD
+ if (lib == NULL) lib = (void *)(intptr_t)-2;
+#endif
+ return (const char *)dlsym(lib, sym);
+}
+
+#elif LJ_TARGET_WINDOWS
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+#ifndef GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
+#define GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS 4
+#define GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT 2
+BOOL WINAPI GetModuleHandleExA(DWORD, LPCSTR, HMODULE*);
+#endif
+
+#undef setprogdir
+
+static void setprogdir(lua_State *L)
+{
+ char buff[MAX_PATH + 1];
+ char *lb;
+ DWORD nsize = sizeof(buff);
+ 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)
+{
+ DWORD 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, int gl)
+{
+ HINSTANCE lib = LoadLibraryA(path);
+ if (lib == NULL) pusherror(L);
+ UNUSED(gl);
+ 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;
+}
+
+static const char *ll_bcsym(void *lib, const char *sym)
+{
+ if (lib) {
+ return (const char *)GetProcAddress((HINSTANCE)lib, sym);
+ } else {
+ HINSTANCE h = GetModuleHandleA(NULL);
+ const char *p = (const char *)GetProcAddress(h, sym);
+ if (p == NULL && GetModuleHandleExA(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS|GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
+ (const char *)ll_bcsym, &h))
+ p = (const char *)GetProcAddress(h, sym);
+ return p;
+ }
+}
+
+#else
+
+#undef PACKAGE_LIB_FAIL
+#define PACKAGE_LIB_FAIL "absent"
+
+#define DLMSG "dynamic libraries not enabled; no support for target OS"
+
+static void ll_unloadlib(void *lib)
+{
+ UNUSED(lib);
+}
+
+static void *ll_load(lua_State *L, const char *path, int gl)
+{
+ UNUSED(path); UNUSED(gl);
+ lua_pushliteral(L, DLMSG);
+ return NULL;
+}
+
+static lua_CFunction ll_sym(lua_State *L, void *lib, const char *sym)
+{
+ UNUSED(lib); UNUSED(sym);
+ lua_pushliteral(L, DLMSG);
+ return NULL;
+}
+
+static const char *ll_bcsym(void *lib, const char *sym)
+{
+ UNUSED(lib); UNUSED(sym);
+ return NULL;
+}
+
+#endif
+
+/* ------------------------------------------------------------------------ */
+
+static void **ll_register(lua_State *L, const char *path)
+{
+ void **plib;
+ lua_pushfstring(L, "LOADLIB: %s", 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(void *));
+ *plib = NULL;
+ luaL_getmetatable(L, "_LOADLIB");
+ lua_setmetatable(L, -2);
+ lua_pushfstring(L, "LOADLIB: %s", path);
+ lua_pushvalue(L, -2);
+ lua_settable(L, LUA_REGISTRYINDEX);
+ }
+ return plib;
+}
+
+static const char *mksymname(lua_State *L, const char *modname,
+ const char *prefix)
+{
+ const char *funcname;
+ const char *mark = strchr(modname, *LUA_IGMARK);
+ if (mark) modname = mark + 1;
+ funcname = luaL_gsub(L, modname, ".", "_");
+ funcname = lua_pushfstring(L, prefix, funcname);
+ lua_remove(L, -2); /* remove 'gsub' result */
+ return funcname;
+}
+
+static int ll_loadfunc(lua_State *L, const char *path, const char *name, int r)
+{
+ void **reg = ll_register(L, path);
+ if (*reg == NULL) *reg = ll_load(L, path, (*name == '*'));
+ if (*reg == NULL) {
+ return PACKAGE_ERR_LIB; /* Unable to load library. */
+ } else if (*name == '*') { /* Only load library into global namespace. */
+ lua_pushboolean(L, 1);
+ return 0;
+ } else {
+ const char *sym = r ? name : mksymname(L, name, SYMPREFIX_CF);
+ lua_CFunction f = ll_sym(L, *reg, sym);
+ if (f) {
+ lua_pushcfunction(L, f);
+ return 0;
+ }
+ if (!r) {
+ const char *bcdata = ll_bcsym(*reg, mksymname(L, name, SYMPREFIX_BC));
+ lua_pop(L, 1);
+ if (bcdata) {
+ if (luaL_loadbuffer(L, bcdata, ~(size_t)0, name) != 0)
+ return PACKAGE_ERR_LOAD;
+ return 0;
+ }
+ }
+ return PACKAGE_ERR_FUNC; /* Unable to find function. */
+ }
+}
+
+static int lj_cf_package_loadlib(lua_State *L)
+{
+ const char *path = luaL_checkstring(L, 1);
+ const char *init = luaL_checkstring(L, 2);
+ int st = ll_loadfunc(L, path, init, 1);
+ if (st == 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, (st == PACKAGE_ERR_LIB) ? PACKAGE_LIB_FAIL : "init");
+ return 3; /* return nil, error message, and where */
+ }
+}
+
+static int lj_cf_package_unloadlib(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 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, (size_t)(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 lj_cf_package_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 *path;
+ 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);
+ return searchpath(L, name, path, ".", LUA_DIRSEP);
+}
+
+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 lj_cf_package_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 int lj_cf_package_loader_c(lua_State *L)
+{
+ 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 */
+ if (ll_loadfunc(L, filename, name, 0) != 0)
+ loaderror(L, filename);
+ return 1; /* library loaded successfully */
+}
+
+static int lj_cf_package_loader_croot(lua_State *L)
+{
+ const char *filename;
+ const char *name = luaL_checkstring(L, 1);
+ const char *p = strchr(name, '.');
+ int st;
+ if (p == NULL) return 0; /* is root */
+ lua_pushlstring(L, name, (size_t)(p - name));
+ filename = findfile(L, lua_tostring(L, -1), "cpath");
+ if (filename == NULL) return 1; /* root not found */
+ if ((st = ll_loadfunc(L, filename, name, 0)) != 0) {
+ if (st != PACKAGE_ERR_FUNC) 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 lj_cf_package_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? */
+ const char *bcname = mksymname(L, name, SYMPREFIX_BC);
+ const char *bcdata = ll_bcsym(NULL, bcname);
+ if (bcdata == NULL || luaL_loadbuffer(L, bcdata, ~(size_t)0, name) != 0)
+ lua_pushfstring(L, "\n\tno field package.preload['%s']", name);
+ }
+ return 1;
+}
+
+/* ------------------------------------------------------------------------ */
+
+static const int sentinel_ = 0;
+#define sentinel ((void *)&sentinel_)
+
+static int lj_cf_package_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 */
+ }
+ lj_lib_checkfpu(L);
+ return 1;
+}
+
+/* ------------------------------------------------------------------------ */
+
+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, (size_t)(dot - modname));
+ lua_setfield(L, -2, "_PACKAGE");
+}
+
+static int lj_cf_package_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)
+ lj_err_callerv(L, LJ_ERR_BADMODN, 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 lj_cf_package_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;
+}
+
+/* ------------------------------------------------------------------------ */
+
+#define AUXMARK "\1"
+
+static void setpath(lua_State *L, const char *fieldname, const char *envname,
+ const char *def, int noenv)
+{
+#if LJ_TARGET_CONSOLE
+ const char *path = NULL;
+ UNUSED(envname);
+#else
+ const char *path = getenv(envname);
+#endif
+ if (path == NULL || noenv) {
+ lua_pushstring(L, def);
+ } else {
+ 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 package_lib[] = {
+ { "loadlib", lj_cf_package_loadlib },
+ { "searchpath", lj_cf_package_searchpath },
+ { "seeall", lj_cf_package_seeall },
+ { NULL, NULL }
+};
+
+static const luaL_Reg package_global[] = {
+ { "module", lj_cf_package_module },
+ { "require", lj_cf_package_require },
+ { NULL, NULL }
+};
+
+static const lua_CFunction package_loaders[] =
+{
+ lj_cf_package_loader_preload,
+ lj_cf_package_loader_lua,
+ lj_cf_package_loader_c,
+ lj_cf_package_loader_croot,
+ NULL
+};
+
+LUALIB_API int luaopen_package(lua_State *L)
+{
+ int i;
+ int noenv;
+ luaL_newmetatable(L, "_LOADLIB");
+ lj_lib_pushcf(L, lj_cf_package_unloadlib, 1);
+ lua_setfield(L, -2, "__gc");
+ luaL_register(L, LUA_LOADLIBNAME, package_lib);
+ lua_pushvalue(L, -1);
+ lua_replace(L, LUA_ENVIRONINDEX);
+ lua_createtable(L, sizeof(package_loaders)/sizeof(package_loaders[0])-1, 0);
+ for (i = 0; package_loaders[i] != NULL; i++) {
+ lj_lib_pushcf(L, package_loaders[i], 1);
+ lua_rawseti(L, -2, i+1);
+ }
+ lua_setfield(L, -2, "loaders");
+ lua_getfield(L, LUA_REGISTRYINDEX, "LUA_NOENV");
+ noenv = lua_toboolean(L, -1);
+ lua_pop(L, 1);
+ setpath(L, "path", LUA_PATH, LUA_PATH_DEFAULT, noenv);
+ setpath(L, "cpath", LUA_CPATH, LUA_CPATH_DEFAULT, noenv);
+ lua_pushliteral(L, LUA_PATH_CONFIG);
+ lua_setfield(L, -2, "config");
+ luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED", 16);
+ lua_setfield(L, -2, "loaded");
+ luaL_findtable(L, LUA_REGISTRYINDEX, "_PRELOAD", 4);
+ lua_setfield(L, -2, "preload");
+ lua_pushvalue(L, LUA_GLOBALSINDEX);
+ luaL_register(L, NULL, package_global);
+ lua_pop(L, 1);
+ return 1;
+}
+
|