Home | History | Annotate | Line # | Download | only in monop
roll.c revision 1.5 
      1 /*	$NetBSD: roll.c,v 1.5 1995/03/23 08:35:13 cgd 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 #ifndef lint
     37 #if 0
     38 static char sccsid[] = "@(#)roll.c	8.1 (Berkeley) 5/31/93";
     39 #else
     40 static char rcsid[] = "$NetBSD: roll.c,v 1.5 1995/03/23 08:35:13 cgd Exp $";
     41 #endif
     42 #endif /* not lint */
     43 
     44 #include <stdlib.h>
     45 
     46 /*
     47  *	This routine rolls ndie nside-sided dice.
     48  */
     49 
     50 # define	reg	register
     51 
     52 # if defined(pdp11)
     53 # define	MAXRAND	32767L
     54 
     55 roll(ndie, nsides)
     56 int	ndie, nsides; {
     57 
     58 	reg long	tot;
     59 	reg unsigned	n, r;
     60 
     61 	tot = 0;
     62 	n = ndie;
     63 	while (n--)
     64 		tot += rand();
     65 	return (int) ((tot * (long) nsides) / ((long) MAXRAND + 1)) + ndie;
     66 }
     67 
     68 # else
     69 
     70 roll(ndie, nsides)
     71 reg int	ndie, nsides; {
     72 
     73 	reg int		tot, r;
     74 	reg double	num_sides;
     75 
     76 	num_sides = nsides;
     77 	tot = 0;
     78 	while (ndie--)
     79 		tot += (r = rand()) * (num_sides / RAND_MAX) + 1;
     80 	return tot;
     81 }
     82 # endif
     83