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root/Development/ray/src/common/urand.c

Comparing ray/src/common/urand.c (file contents):
Revision 2.11 by greg, Wed May 27 08:42:06 2015 UTC vs.
Revision 2.12 by greg, Thu Apr 21 02:52:40 2022 UTC

#	Line 7 | Line 7 | static const char      RCSid[] = "$Id$";
7
8		#include "copyright.h"
9
10	<	#include  "standard.h"
10	>	#include  "rterror.h"
11		#include  "random.h"
12
13		#undef initurand
#	Line 19 | Line 19 | static unsigned short  empty_tab = 0;
19		unsigned short  *urperm = &empty_tab;   /* urand() permutation */
20		int  urmask = 0;                        /* bits used in permutation */
21
22	+
23	+	long
24	+	irandom(                        /* better than using random() % modulus */
25	+	long modulus
26	+	)
27	+	{
28	+	static const int        isize = sizeof(int);
29	+	static const int        lsize = sizeof(long);
30	+	static const int        llsize = sizeof(long long);
31	+
32	+	if ((lsize == 8) | (isize == 8))
33	+	return((random()*modulus)>>31);
34	+
35	+	if (llsize == 8)
36	+	return((random()*(long long)modulus)>>31);
37	+
38	+	return(random() % modulus);
39	+	}
40
41		int
42		initurand(                      /* initialize urand() for size entries */

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