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BSD 4.3tahoe

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)rnd_pos.c	5.3 (Berkeley) 6/18/88";
#endif /* not lint */

# include	"robots.h"

# define	IS_SAME(p,y,x)	((p).y != -1 && (p).y == y && (p).x == x)

/*
 * rnd_pos:
 *	Pick a random, unoccupied position
 */
COORD *
rnd_pos()
{
	static COORD	pos;
	static int	call = 0;
	register int	i = 0;

	do {
		pos.y = rnd(Y_FIELDSIZE - 1) + 1;
		pos.x = rnd(X_FIELDSIZE - 1) + 1;
		refresh();
	} while (Field[pos.y][pos.x] != 0);
	call++;
	return &pos;
}

rnd(range)
int	range;
{
	unsigned int	rand();

	return rand() % range;
}

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