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root/Development/ray/src/common/urand.c
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Comparing ray/src/common/urand.c (file contents):
Revision 2.4 by gregl, Mon Jan 5 16:47:37 1998 UTC vs.
Revision 2.6 by greg, Tue Feb 25 02:47:22 2003 UTC

# Line 1 | Line 1
1 – /* Copyright (c) 1998 Silicon Graphics, Inc. */
2 –
1   #ifndef lint
2 < static char SCCSid[] = "$SunId$ SGI";
2 > static const char       RCSid[] = "$Id$";
3   #endif
6 –
4   /*
5   * Anticorrelated random function due to Christophe Schlick
6   */
7  
8 + #include "copyright.h"
9 +
10 + #include  <stdlib.h>
11   #include  "random.h"
12  
13 < #define  NULL           0
13 > #undef initurand
14  
15   #define  MAXORDER       (8*sizeof(unsigned short))
16  
17 – extern char  *malloc();
18 –
17   unsigned short  *urperm = NULL; /* urand() permutation */
18   int  urmask;            /* bits used in permutation */
19  
22 –
20   int
21   initurand(size)         /* initialize urand() for size entries */
22   int  size;
# Line 28 | Line 25 | int  size;
25          register int  i, offset;
26  
27          if (urperm != NULL)
28 <                free((char *)urperm);
29 <        size--;
28 >                free((void *)urperm);
29 >        if (--size <= 0) {
30 >                urperm = NULL;
31 >                urmask = 0;
32 >                return(0);
33 >        }
34          for (i = 1; size >>= 1; i++)
35                  ;
36          order = i>MAXORDER ? MAXORDER : i;

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