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roll.c revision 1.11 
      1 /*	$NetBSD: roll.c,v 1.11 2008/02/24 01:57:34 dholland 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 1.11 2008/02/24 01:57:34 dholland Exp $");
     38 #endif
     39 #endif /* not lint */
     40 
     41 #include <stdlib.h>
     42 
     43 #include "monop.h"
     44 
     45 /*
     46  *	This routine rolls ndie nside-sided dice.
     47  */
     48 
     49 #if defined(pdp11)
     50 #define	MAXRAND	32767L
     51 
     52 int
     53 roll(ndie, nsides)
     54 	int ndie, nsides;
     55 {
     56 	long tot;
     57 	unsigned n, r;
     58 
     59 	tot = 0;
     60 	n = ndie;
     61 	while (n--)
     62 		tot += rand();
     63 	return (int) ((tot * (long) nsides) / ((long) MAXRAND + 1)) + ndie;
     64 }
     65 
     66 #else
     67 
     68 int
     69 roll(ndie, nsides)
     70 	int ndie, nsides;
     71 {
     72 	int tot, r;
     73 	double num_sides;
     74 
     75 	num_sides = nsides;
     76 	tot = 0;
     77 	while (ndie--)
     78 		tot += (r = random()) * (num_sides / RAND_MAX) + 1;
     79 	return tot;
     80 }
     81 #endif
     82