1 /* $NetBSD: roll.c,v 1.8 2002/06/02 22:17:37 wiz 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)roll.c 8.1 (Berkeley) 5/31/93"; 40 #else 41 __RCSID("$NetBSD: roll.c,v 1.8 2002/06/02 22:17:37 wiz Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include "monop.ext" 46 #include <stdlib.h> 47 48 /* 49 * This routine rolls ndie nside-sided dice. 50 */ 51 52 #if defined(pdp11) 53 #define MAXRAND 32767L 54 55 int 56 roll(ndie, nsides) 57 int ndie, nsides; 58 { 59 long tot; 60 unsigned n, r; 61 62 tot = 0; 63 n = ndie; 64 while (n--) 65 tot += rand(); 66 return (int) ((tot * (long) nsides) / ((long) MAXRAND + 1)) + ndie; 67 } 68 69 #else 70 71 int 72 roll(ndie, nsides) 73 int ndie, nsides; 74 { 75 int tot, r; 76 double num_sides; 77 78 num_sides = nsides; 79 tot = 0; 80 while (ndie--) 81 tot += (r = rand()) * (num_sides / RAND_MAX) + 1; 82 return tot; 83 } 84 #endif 85