Streamline the archive loading mechanism
[tennix.git] / util.c
blob57093e35b7edbb898d573bed92f1380b30db5fd7
2 /**
4 * Tennix! SDL Port
5 * Copyright (C) 2003, 2007, 2008, 2009 Thomas Perl <thp@thpinfo.com>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
20 * MA 02110-1301, USA.
22 **/
24 #include "tennix.h"
25 #include "util.h"
27 #include <time.h>
28 #include <assert.h>
30 void day_night(unsigned int width, unsigned int* start, unsigned int* end)
32 time_t t = time(NULL);
33 unsigned int offset = 60; /* set this so the day/night fits for London */
35 assert(start != NULL);
36 assert(end != NULL);
38 *start = (unsigned int)(offset - (t/60)*width/(60*24)) % width;
39 *end = (unsigned int)(*start + width/2) % width;