1 /* $NetBSD: roll.c,v 1.9 2003/08/07 09:37:29 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)roll.c 8.1 (Berkeley) 5/31/93"; 36 #else 37 __RCSID("$NetBSD: roll.c,v 1.9 2003/08/07 09:37:29 agc Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include "monop.ext" 42 #include <stdlib.h> 43 44 /* 45 * This routine rolls ndie nside-sided dice. 46 */ 47 48 #if defined(pdp11) 49 #define MAXRAND 32767L 50 51 int 52 roll(ndie, nsides) 53 int ndie, nsides; 54 { 55 long tot; 56 unsigned n, r; 57 58 tot = 0; 59 n = ndie; 60 while (n--) 61 tot += rand(); 62 return (int) ((tot * (long) nsides) / ((long) MAXRAND + 1)) + ndie; 63 } 64 65 #else 66 67 int 68 roll(ndie, nsides) 69 int ndie, nsides; 70 { 71 int tot, r; 72 double num_sides; 73 74 num_sides = nsides; 75 tot = 0; 76 while (ndie--) 77 tot += (r = rand()) * (num_sides / RAND_MAX) + 1; 78 return tot; 79 } 80 #endif 81