here's my lua config file loader, that loads variables from a file
#include <iostream>
#include <math.h>
#include "config.hpp"
float C_MAXDEPTH=500;
float C_MAXREALDEPTH=50;
int C_SCREEN_WIDTH=640;
int C_SCREEN_HEIGHT=480;
bool C_FULLSCREEN=1;
bool C_ASPECTFLAG=0;
extern "C" {
#include "lua.h"
#include "lualib.h"
#include "lauxlib.h"
#include <stdlib.h>
#include <stdio.h>
}
float getmaxdepth(){return C_MAXDEPTH;}
float getmaxrealdepth(){return C_MAXREALDEPTH;}
int getscreenwidth(){return C_SCREEN_WIDTH;}
int getscreenheight(){return C_SCREEN_HEIGHT;}
bool getfullscreen(){return C_FULLSCREEN;}
bool getaspectflag(){return C_ASPECTFLAG;}
void load_config_vars()
{
int status, result;
lua_State *L;
/*
* All Lua contexts are held in this structure. We work with it almost
* all the time.
*/
L = luaL_newstate();
luaL_openlibs(L);
/* Load the file containing the script we are going to run */
status = luaL_loadfile(L, "settings/config.txt");
if (status) {
/* If something went wrong, error message is at the top of */
/* the stack */
fprintf(stderr, "Couldn't load file: %s\n", lua_tostring(L, -1));
exit(1);
}
/* Ask Lua to run our little script */
result = lua_pcall(L, 0, LUA_MULTRET, 0);
lua_getglobal(L,"screenwidth");
C_SCREEN_WIDTH = (int)(lua_tonumber(L, -1));
lua_getglobal(L,"screenheight");
C_SCREEN_HEIGHT = (int)(lua_tonumber(L, -1));
lua_getglobal(L,"fullscreen");
C_FULLSCREEN = (int)(lua_toboolean(L, -1));
lua_getglobal(L,"maxdepth");
C_MAXDEPTH = (int)(lua_tonumber(L, -1));
lua_getglobal(L,"maxrealdepth");
C_MAXREALDEPTH = (int)(lua_tonumber(L, -1));
lua_close(L); /* Cya, Lua */
}
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