BUILDIN(getmapusersid) // Returns array
{
	struct map_session_data *pl_sd = NULL;
	struct s_mapiterator *iter = NULL;
	char map_name[MAP_NAME_LENGTH_EXT] = "";
	int16 m = -1;
	int i = 0;
	
	if (script_hasdata(st, 2)) { // Retrieving and validating input
		if (script_isstringtype(st, 2)) { // Data string must be a map name
			const char *mymap = script_getstr(st,4);
			safestrncpy(map_name,mymap,MAP_NAME_LENGTH_EXT);
			m = (map_id = map->mapname2mapid(map_name));
			if ( m < 0 ) {
				ShowWarning("getmapusersid: Invalid map specified.\n");
				script_pushint(st, 0); // There are no users in an invalid map
			}
		}
		else {
			ShowWarning("getmapusersid: retrieved argument was not string type. Defaulting to all maps.\n");
			script_pushint(st, 0); // There are no users in an invalid map
		}
	}
	
	iter = mapit_getallusers(); // Get all users and filter for maps
	for (pl_sd = (TBL_PC*)mapit->first(iter); mapit->exists(iter); pl_sd = (TBL_PC*)mapit->next(iter))	{
		if ( m >= 0 && pl_sd->bl.m != map_id ) {
			continue;
		}
		
		mapreg->setreg(reference_uid(script->add_str(".@user_ids"), i),pl_sd->bl.id);
		i++;
	}
	
	script_pushint(st, i);
}

BUILDIN_DEF(getmapusersid,"?"),