1 /*
2 ** $Id: linit.c,v 1.39.1.1 2017/04/19 17:20:42 roberto Exp $
3 ** Initialization of libraries for lua.c and other clients
4 ** See Copyright Notice in lua.h
5 */
6
7
8 #define linit_c
9 #define LUA_LIB
10
11 /*
12 ** If you embed Lua in your program and need to open the standard
13 ** libraries, call luaL_openlibs in your program. If you need a
14 ** different set of libraries, copy this file to your project and edit
15 ** it to suit your needs.
16 **
17 ** You can also *preload* libraries, so that a later 'require' can
18 ** open the library, which is already linked to the application.
19 ** For that, do the following code:
20 **
21 ** luaL_getsubtable(L, LUA_REGISTRYINDEX, LUA_PRELOAD_TABLE);
22 ** lua_pushcfunction(L, luaopen_modname);
23 ** lua_setfield(L, -2, modname);
24 ** lua_pop(L, 1); // remove PRELOAD table
25 */
26
27 #include "lprefix.h"
28
29 #include <stddef.h>
30 #include <stdlib.h>
31
32 #include "lua.h"
33
34 #include "lualib.h"
35 #include "lauxlib.h"
36 #include "lposix.h"
37
38 #include "bootstrap.h"
39
40 /*
41 ** these libs are loaded by lua.c and are readily available to any Lua
42 ** program
43 */
44 static const luaL_Reg loadedlibs[] = {
45 {"_G", luaopen_base},
46 {LUA_LOADLIBNAME, luaopen_package},
47 {LUA_COLIBNAME, luaopen_coroutine},
48 {LUA_TABLIBNAME, luaopen_table},
49 {LUA_IOLIBNAME, luaopen_io},
50 {LUA_OSLIBNAME, luaopen_os},
51 {LUA_STRLIBNAME, luaopen_string},
52 {LUA_MATHLIBNAME, luaopen_math},
53 {LUA_UTF8LIBNAME, luaopen_utf8},
54 {LUA_DBLIBNAME, luaopen_debug},
55 #if defined(LUA_COMPAT_BITLIB)
56 {LUA_BITLIBNAME, luaopen_bit32},
57 #endif
58 /* FreeBSD Extensions */
59 {"posix", luaopen_posix},
60 {NULL, NULL}
61 };
62
63 #ifdef BOOTSTRAPPING
flua_init_env(void)64 static void __attribute__((constructor)) flua_init_env(void) {
65 /*
66 * This happens in the middle of luaopen_package(). We could move it into
67 * flua_setup_mods(), but it seems better to avoid its timing being so
68 * important that it would break some of our bootstrap modules if someone
69 * were to reorder things.
70 */
71 if (getenv("LUA_PATH") == NULL)
72 setenv("LUA_PATH", BOOTSTRAP_FLUA_PATH, 1);
73 }
74
flua_setup_mods(lua_State * L)75 static void flua_setup_mods (lua_State *L) {
76 const luaL_Reg **flib;
77
78 SET_FOREACH(flib, FLUA_MODULE_SETNAME) {
79 luaL_requiref(L, (*flib)->name, (*flib)->func, 1);
80 lua_pop(L, 1); /* remove lib */
81 }
82 };
83 #endif
84
luaL_openlibs(lua_State * L)85 LUALIB_API void luaL_openlibs (lua_State *L) {
86 const luaL_Reg *lib;
87 /* "require" functions from 'loadedlibs' and set results to global table */
88 for (lib = loadedlibs; lib->func; lib++) {
89 luaL_requiref(L, lib->name, lib->func, 1);
90 lua_pop(L, 1); /* remove lib */
91 }
92 #ifdef BOOTSTRAPPING
93 flua_setup_mods(L);
94 #endif
95 }
96