monop/roll.c

   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