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      1  1.11       nia /*	$NetBSD: rnd_pos.c,v 1.11 2020/07/26 15:38:22 nia Exp $	*/
      2   1.3       cgd 
      3   1.1       cgd /*
      4   1.3       cgd  * Copyright (c) 1980, 1993
      5   1.3       cgd  *	The Regents of the University of California.  All rights reserved.
      6   1.1       cgd  *
      7   1.1       cgd  * Redistribution and use in source and binary forms, with or without
      8   1.1       cgd  * modification, are permitted provided that the following conditions
      9   1.1       cgd  * are met:
     10   1.1       cgd  * 1. Redistributions of source code must retain the above copyright
     11   1.1       cgd  *    notice, this list of conditions and the following disclaimer.
     12   1.1       cgd  * 2. Redistributions in binary form must reproduce the above copyright
     13   1.1       cgd  *    notice, this list of conditions and the following disclaimer in the
     14   1.1       cgd  *    documentation and/or other materials provided with the distribution.
     15   1.5       agc  * 3. Neither the name of the University nor the names of its contributors
     16   1.1       cgd  *    may be used to endorse or promote products derived from this software
     17   1.1       cgd  *    without specific prior written permission.
     18   1.1       cgd  *
     19   1.1       cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20   1.1       cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21   1.1       cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22   1.1       cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23   1.1       cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24   1.1       cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25   1.1       cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26   1.1       cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27   1.1       cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28   1.1       cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29   1.1       cgd  * SUCH DAMAGE.
     30   1.1       cgd  */
     31   1.1       cgd 
     32   1.4     lukem #include <sys/cdefs.h>
     33   1.1       cgd #ifndef lint
     34   1.3       cgd #if 0
     35   1.3       cgd static char sccsid[] = "@(#)rnd_pos.c	8.1 (Berkeley) 5/31/93";
     36   1.3       cgd #else
     37  1.11       nia __RCSID("$NetBSD: rnd_pos.c,v 1.11 2020/07/26 15:38:22 nia Exp $");
     38   1.3       cgd #endif
     39   1.1       cgd #endif /* not lint */
     40   1.1       cgd 
     41   1.8  dholland #include <curses.h>
     42   1.8  dholland #include <stdlib.h>
     43   1.7  dholland #include "robots.h"
     44   1.1       cgd 
     45   1.7  dholland #define IS_SAME(p,y,x)	((p).y != -1 && (p).y == y && (p).x == x)
     46   1.1       cgd 
     47   1.1       cgd /*
     48   1.1       cgd  * rnd_pos:
     49   1.1       cgd  *	Pick a random, unoccupied position
     50   1.1       cgd  */
     51   1.1       cgd COORD *
     52   1.6  dholland rnd_pos(void)
     53   1.1       cgd {
     54   1.7  dholland 	static COORD pos;
     55   1.7  dholland 	static int call = 0;
     56   1.1       cgd 
     57   1.1       cgd 	do {
     58  1.11       nia 		pos.y = arc4random_uniform(Y_FIELDSIZE - 1) + 1;
     59  1.11       nia 		pos.x = arc4random_uniform(X_FIELDSIZE - 1) + 1;
     60   1.1       cgd 		refresh();
     61   1.1       cgd 	} while (Field[pos.y][pos.x] != 0);
     62   1.1       cgd 	call++;
     63   1.1       cgd 	return &pos;
     64   1.1       cgd }
     65