liblua/linit.c

   1 /*
   2 ** $Id: linit.c,v 1.32 2011/04/08 19:17:36 roberto Exp $
   3 ** Initialization of libraries for lua.c and other clients
   4 ** See Copyright Notice in lua.h
   5 */
   6
   7
   8 /*
   9 ** If you embed Lua in your program and need to open the standard
  10 ** libraries, call luaL_openlibs in your program. If you need a
  11 ** different set of libraries, copy this file to your project and edit
  12 ** it to suit your needs.
  13 */
  14
  15
  16 #define linit_c
  17 #define LUA_LIB
  18
  19 #include "lua.h"
  20
  21 #include "lualib.h"
  22 #include "lauxlib.h"
  23
  24
  25 /*
  26 ** these libs are loaded by lua.c and are readily available to any Lua
  27 ** program
  28 */
  29 static const luaL_Reg loadedlibs[] = {
  30   {"_G", luaopen_base},
  31   {LUA_LOADLIBNAME, luaopen_package},
  32   {LUA_COLIBNAME, luaopen_coroutine},
  33   {LUA_TABLIBNAME, luaopen_table},
  34   {LUA_IOLIBNAME, luaopen_io},
  35   {LUA_OSLIBNAME, luaopen_os},
  36   {LUA_STRLIBNAME, luaopen_string},
  37   {LUA_BITLIBNAME, luaopen_bit32},
  38   {LUA_MATHLIBNAME, luaopen_math},
  39   {LUA_DBLIBNAME, luaopen_debug},
  40   {NULL, NULL}
  41 };
  42
  43
  44 /*
  45 ** these libs are preloaded and must be required before used
  46 */
  47 static const luaL_Reg preloadedlibs[] = {
  48   {NULL, NULL}
  49 };
  50
  51
  52 LUALIB_API void luaL_openlibs (lua_State *L) {
  53   const luaL_Reg *lib;
  54   /* call open functions from 'loadedlibs' and set results to global table */
  55   for (lib = loadedlibs; lib->func; lib++) {
  56     luaL_requiref(L, lib->name, lib->func, 1);
  57     lua_pop(L, 1);  /* remove lib */
  58   }
  59   /* add open functions from 'preloadedlibs' into 'package.preload' table */
  60   luaL_getsubtable(L, LUA_REGISTRYINDEX, "_PRELOAD");
  61   for (lib = preloadedlibs; lib->func; lib++) {
  62     lua_pushcfunction(L, lib->func);
  63     lua_setfield(L, -2, lib->name);
  64   }
  65   lua_pop(L, 1);  /* remove _PRELOAD table */
  66 }
  67