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root/radiance/ray/src/common/urand.c
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Comparing ray/src/common/urand.c (file contents):
Revision 2.10 by greg, Wed Apr 5 06:22:56 2006 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  <stdlib.h>
11 <
12 < #include  "standard.h"
10 > #include  "rterror.h"
11   #include  "random.h"
12  
13   #undef initurand
# Line 21 | 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(size)         /* initialize urand() for size entries */
43 < int  size;
42 > initurand(                      /* initialize urand() for size entries */
43 >        int  size
44 > )
45   {
46          int  order, n;
47 <        register int  i, offset;
47 >        int  i, offset;
48  
49          if ((urperm != NULL) & (urperm != &empty_tab))
50                  free((void *)urperm);
# Line 60 | Line 78 | int  size;
78  
79  
80   int
81 < ilhash(d, n)                    /* hash a set of integer values */
82 < register int  *d;
83 < register int  n;
81 > ilhash(                         /* hash a set of integer values */
82 >        int  *d,
83 >        int  n
84 > )
85   {
86          static int  tab[8] = {103699,96289,73771,65203,81119,87037,92051,98899};
87 <        register int  hval;
87 >        int  hval;
88  
89          hval = 0;
90          while (n-- > 0)

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