linit_flua.c

/*
** $Id: linit.c,v 1.39.1.1 2017/04/19 17:20:42 roberto Exp $
** Initialization of libraries for lua.c and other clients
** See Copyright Notice in lua.h
*/


#define linit_c
#define LUA_LIB

/*
** If you embed Lua in your program and need to open the standard
** libraries, call luaL_openlibs in your program. If you need a
** different set of libraries, copy this file to your project and edit
** it to suit your needs.
**
** You can also *preload* libraries, so that a later 'require' can
** open the library, which is already linked to the application.
** For that, do the following code:
**
**  luaL_getsubtable(L, LUA_REGISTRYINDEX, LUA_PRELOAD_TABLE);
**  lua_pushcfunction(L, luaopen_modname);
**  lua_setfield(L, -2, modname);
**  lua_pop(L, 1);  // remove PRELOAD table
*/

#include "lprefix.h"

#include <stddef.h>
#include <stdlib.h>

#include "lua.h"

#include "lualib.h"
#include "lauxlib.h"
#include "lposix.h"

#include "bootstrap.h"

/*
** these libs are loaded by lua.c and are readily available to any Lua
** program
*/
static const luaL_Reg loadedlibs[] = {
  {"_G", luaopen_base},
  {LUA_LOADLIBNAME, luaopen_package},
  {LUA_COLIBNAME, luaopen_coroutine},
  {LUA_TABLIBNAME, luaopen_table},
  {LUA_IOLIBNAME, luaopen_io},
  {LUA_OSLIBNAME, luaopen_os},
  {LUA_STRLIBNAME, luaopen_string},
  {LUA_MATHLIBNAME, luaopen_math},
  {LUA_UTF8LIBNAME, luaopen_utf8},
  {LUA_DBLIBNAME, luaopen_debug},
#if defined(LUA_COMPAT_BITLIB)
  {LUA_BITLIBNAME, luaopen_bit32},
#endif
  /* FreeBSD Extensions */
  {"posix", luaopen_posix},
  {NULL, NULL}
};

#ifdef BOOTSTRAPPING
static void __attribute__((constructor)) flua_init_env(void) {
  /*
   * This happens in the middle of luaopen_package().  We could move it into
   * flua_setup_mods(), but it seems better to avoid its timing being so
   * important that it would break some of our bootstrap modules if someone
   * were to reorder things.
   */
  if (getenv("LUA_PATH") == NULL)
    setenv("LUA_PATH", BOOTSTRAP_FLUA_PATH, 1);
}

static void flua_setup_mods (lua_State *L) {
  const luaL_Reg **flib;

  SET_FOREACH(flib, FLUA_MODULE_SETNAME) {
    luaL_requiref(L, (*flib)->name, (*flib)->func, 1);
    lua_pop(L, 1);  /* remove lib */
  }
};
#endif

LUALIB_API void luaL_openlibs (lua_State *L) {
  const luaL_Reg *lib;
  /* "require" functions from 'loadedlibs' and set results to global table */
  for (lib = loadedlibs; lib->func; lib++) {
    luaL_requiref(L, lib->name, lib->func, 1);
    lua_pop(L, 1);  /* remove lib */
  }
#ifdef BOOTSTRAPPING
  flua_setup_mods(L);
#endif
}