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roll.c revision 1.6 
      1 /*	$NetBSD: roll.c,v 1.6 1997/10/12 17:45:25 christos 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 1.6 1997/10/12 17:45:25 christos 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 # define	reg	register
     53 
     54 # if defined(pdp11)
     55 # define	MAXRAND	32767L
     56 
     57 int
     58 roll(ndie, nsides)
     59 int	ndie, nsides;
     60 {
     61 
     62 	long	tot;
     63 	unsigned	n, r;
     64 
     65 	tot = 0;
     66 	n = ndie;
     67 	while (n--)
     68 		tot += rand();
     69 	return (int) ((tot * (long) nsides) / ((long) MAXRAND + 1)) + ndie;
     70 }
     71 
     72 # else
     73 
     74 int
     75 roll(ndie, nsides)
     76 int	ndie, nsides; {
     77 
     78 	int		tot, r;
     79 	double	num_sides;
     80 
     81 	num_sides = nsides;
     82 	tot = 0;
     83 	while (ndie--)
     84 		tot += (r = rand()) * (num_sides / RAND_MAX) + 1;
     85 	return tot;
     86 }
     87 # endif
     88