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