1 /* 2 * Copyright (c) 1980 Regents of the University of California. 3 * 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. 32 */ 33 34 #ifndef lint 35 /*static char sccsid[] = "from: @(#)rnd_pos.c 5.4 (Berkeley) 6/1/90";*/ 36 static char rcsid[] = "$Id: rnd_pos.c,v 1.2 1993/08/01 18:52:40 mycroft Exp $"; 37 #endif /* not lint */ 38 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 */ 47 COORD * 48 rnd_pos() 49 { 50 static COORD pos; 51 static int call = 0; 52 register 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 63 rnd(range) 64 int range; 65 { 66 unsigned int rand(); 67 68 return rand() % range; 69 } 70