1*42708011Snia /* $NetBSD: rnd_pos.c,v 1.11 2020/07/26 15:38:22 nia Exp $ */
26045e6e0Scgd
361f28255Scgd /*
46045e6e0Scgd * Copyright (c) 1980, 1993
56045e6e0Scgd * The Regents of the University of California. All rights reserved.
661f28255Scgd *
761f28255Scgd * Redistribution and use in source and binary forms, with or without
861f28255Scgd * modification, are permitted provided that the following conditions
961f28255Scgd * are met:
1061f28255Scgd * 1. Redistributions of source code must retain the above copyright
1161f28255Scgd * notice, this list of conditions and the following disclaimer.
1261f28255Scgd * 2. Redistributions in binary form must reproduce the above copyright
1361f28255Scgd * notice, this list of conditions and the following disclaimer in the
1461f28255Scgd * documentation and/or other materials provided with the distribution.
15e5aeb4eaSagc * 3. Neither the name of the University nor the names of its contributors
1661f28255Scgd * may be used to endorse or promote products derived from this software
1761f28255Scgd * without specific prior written permission.
1861f28255Scgd *
1961f28255Scgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
2061f28255Scgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2161f28255Scgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2261f28255Scgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
2361f28255Scgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2461f28255Scgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2561f28255Scgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2661f28255Scgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2761f28255Scgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2861f28255Scgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
2961f28255Scgd * SUCH DAMAGE.
3061f28255Scgd */
3161f28255Scgd
329007937fSlukem #include <sys/cdefs.h>
3361f28255Scgd #ifndef lint
346045e6e0Scgd #if 0
356045e6e0Scgd static char sccsid[] = "@(#)rnd_pos.c 8.1 (Berkeley) 5/31/93";
366045e6e0Scgd #else
37*42708011Snia __RCSID("$NetBSD: rnd_pos.c,v 1.11 2020/07/26 15:38:22 nia Exp $");
386045e6e0Scgd #endif
3961f28255Scgd #endif /* not lint */
4061f28255Scgd
41a4cc1f4fSdholland #include <curses.h>
42a4cc1f4fSdholland #include <stdlib.h>
4361f28255Scgd #include "robots.h"
4461f28255Scgd
4561f28255Scgd #define IS_SAME(p,y,x) ((p).y != -1 && (p).y == y && (p).x == x)
4661f28255Scgd
4761f28255Scgd /*
4861f28255Scgd * rnd_pos:
4961f28255Scgd * Pick a random, unoccupied position
5061f28255Scgd */
5161f28255Scgd COORD *
rnd_pos(void)5230870bd5Sdholland rnd_pos(void)
5361f28255Scgd {
5461f28255Scgd static COORD pos;
5561f28255Scgd static int call = 0;
5661f28255Scgd
5761f28255Scgd do {
58*42708011Snia pos.y = arc4random_uniform(Y_FIELDSIZE - 1) + 1;
59*42708011Snia pos.x = arc4random_uniform(X_FIELDSIZE - 1) + 1;
6061f28255Scgd refresh();
6161f28255Scgd } while (Field[pos.y][pos.x] != 0);
6261f28255Scgd call++;
6361f28255Scgd return &pos;
6461f28255Scgd }
65