Re: Bug in lua_getfield() ?

[Petr Stetiar <ynezz@...>]

Rici Lake <lua@ricilake.net> [2007-03-26 02:52:07]:

> Petr Stetiar wrote:
> >Rici Lake <lua@ricilake.net> [2007-03-25 23:36:16]:
> >
> >It's something like this:
> >
> >int lua_get_function(char *function)
> >{
> >	lua_getfield(L, LUA_GLOBALSINDEX, function);
> >	if (!lua_isfunction(L, -1)) {
> >		return FALSE;
> >	}
> >
> >	return TRUE;
> >} 
> >
> >int lua_event_generic(char *event_name, char *event_text, int param)
> >{
> >	int ret = 0;
> >	char fnc[MAX_PATH] = {0};
> >	char err[MAX_PATH] = {0};
> >
> >	_snprintf(fnc, MAX_PATH-1, "gabenie_event_%s", event_name);
> >	_snprintf(err, MAX_PATH-1, "error gabenie_event_%s()", event_name);
> >
> >	if (!lua_get_function(fnc)) {
> >		return ret;
> >	}
> 
> Looks like you're letting the nil's pile up on the stack. If you were to 
> call that function 30 times, and there were no hooks to call, you'd have 
> pushed 30 nils on the stack, which is more that LUA_MINSTACK.

Ahh, I understand now.

> See lua_checkstack(). (But the short answer is to pop the stack if 
> you're not going to call the function.)

Ok, thank you :)

-- ynezz