Add the DragonFly cvs id and perform general cleanups on cvs/rcs/sccs ids. Most
[dragonfly.git] / games / robots / rnd_pos.c
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1/*
2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
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32 *
33 * @(#)rnd_pos.c 8.1 (Berkeley) 5/31/93
34 * $FreeBSD: src/games/robots/rnd_pos.c,v 1.5 1999/11/30 03:49:20 billf Exp $
35 * $DragonFly: src/games/robots/rnd_pos.c,v 1.2 2003/06/17 04:25:24 dillon Exp $
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36 */
37
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38# include <stdlib.h>
39# include "robots.h"
40
41# define IS_SAME(p,y,x) ((p).y != -1 && (p).y == y && (p).x == x)
42
43/*
44 * rnd_pos:
45 * Pick a random, unoccupied position
46 */
47COORD *
48rnd_pos()
49{
50 static COORD pos;
51 static int call = 0;
52 int i = 0;
53
54 do {
55 pos.y = rnd(Y_FIELDSIZE - 1) + 1;
56 pos.x = rnd(X_FIELDSIZE - 1) + 1;
57 refresh();
58 } while (Field[pos.y][pos.x] != 0);
59 call++;
60 return &pos;
61}
62
63rnd(range)
64int range;
65{
66 return random() % range;
67}