Re: Lua and C
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- Subject: Re: Lua and C
- From: kleiser@... (Jon Kleiser)
- Date: Tue, 6 Jan 1998 07:58:39 +0100
>Hi,
> I'm new to lua and am evaluating it as a scripting language I can
>use with an application I am writing. I am wondering if anyone has any
>code that shows lua being used as a scripting language that drives a c
>backend. The examples that come with lua are all standalone lua. I have
>read the docs, but they are brief on the topic. Any help is appreciated.
>
>thanks,
>-rich
If you want to call C functions from Lua, you should create something
similar to "mylib.c" below. My "mylib.c" example contains three (Mac)
functions, more or less "made up". You should (like the Lua manual says ;)
look at iolib.c, mathlib.c, and strlib.c for more variations. It's quite
easy!
/Jon
------- 8< ----------------------------------------------- >8 -------
/*
** mylib.c
**
*/
char *rcs_mylib = "$Id: mylib.c,v 0.9 1998年01月06日 07:24:00 jon Exp $";
#include <stdlib.h>
// #include <math.h>
#include "lualib.h"
#include "auxlib.h"
#include "lua.h"
static void my_DoOrDont (void)
{
DoOrDont((Boolean)luaL_check_number(1)); // fake
}
static void my_CursorShape (void)
{
CursorShape(luaL_check_number(1)); // fake
}
static void my_SysBeep (void)
{
SysBeep(luaL_check_number(1)); // real Mac
}
static struct luaL_reg mylib[] = {
{"DoOrDont", my_DoOrDont},
{"CursorShape", my_CursorShape},
{"SysBeep", my_SysBeep}
};
/*
** Open my library
*/
void mylib_open (void); // prototype
void mylib_open (void)
{
luaL_openlib(mylib, (sizeof(mylib)/sizeof(mylib[0])));
}