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Comparing ray/src/common/random.h (file contents):
Revision 2.8 by greg, Sat Feb 22 02:07:22 2003 UTC vs.
Revision 2.24 by greg, Thu Apr 21 02:52:40 2022 UTC

# Line 1 | Line 1
1 < /* RCSid: $Id$ */
1 > /* RCSid $Id$ */
2   /*
3   *  random.h - header file for random(3) and urand() function.
4   */
5 + #ifndef _RAD_RANDOM_H_
6 + #define _RAD_RANDOM_H_
7  
8 < /* ====================================================================
7 < * The Radiance Software License, Version 1.0
8 < *
9 < * Copyright (c) 1990 - 2002 The Regents of the University of California,
10 < * through Lawrence Berkeley National Laboratory.   All rights reserved.
11 < *
12 < * Redistribution and use in source and binary forms, with or without
13 < * modification, are permitted provided that the following conditions
14 < * are met:
15 < *
16 < * 1. Redistributions of source code must retain the above copyright
17 < *         notice, this list of conditions and the following disclaimer.
18 < *
19 < * 2. Redistributions in binary form must reproduce the above copyright
20 < *       notice, this list of conditions and the following disclaimer in
21 < *       the documentation and/or other materials provided with the
22 < *       distribution.
23 < *
24 < * 3. The end-user documentation included with the redistribution,
25 < *           if any, must include the following acknowledgment:
26 < *             "This product includes Radiance software
27 < *                 (http://radsite.lbl.gov/)
28 < *                 developed by the Lawrence Berkeley National Laboratory
29 < *               (http://www.lbl.gov/)."
30 < *       Alternately, this acknowledgment may appear in the software itself,
31 < *       if and wherever such third-party acknowledgments normally appear.
32 < *
33 < * 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
34 < *       and "The Regents of the University of California" must
35 < *       not be used to endorse or promote products derived from this
36 < *       software without prior written permission. For written
37 < *       permission, please contact [email protected].
38 < *
39 < * 5. Products derived from this software may not be called "Radiance",
40 < *       nor may "Radiance" appear in their name, without prior written
41 < *       permission of Lawrence Berkeley National Laboratory.
42 < *
43 < * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
44 < * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
45 < * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
46 < * DISCLAIMED.   IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR
47 < * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48 < * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
49 < * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
50 < * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
51 < * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
52 < * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
53 < * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
54 < * SUCH DAMAGE.
55 < * ====================================================================
56 < *
57 < * This software consists of voluntary contributions made by many
58 < * individuals on behalf of Lawrence Berkeley National Laboratory.   For more
59 < * information on Lawrence Berkeley National Laboratory, please see
60 < * <http://www.lbl.gov/>.
61 < */
8 > #include <stdlib.h>
9  
10 < #ifdef  NORANDOM
10 > #ifdef __cplusplus
11 > extern "C" {
12 > #endif
13  
14 < #undef  random
15 < #define  random()       1073741820
67 < #undef  srandom
68 < #define  srandom(s)     (s)
69 < #define  frandom()      0.5
70 < #define  urand(i)       0.5
71 < #define  initurand(n)   (n)
72 <
73 < #else
74 <
75 < #ifdef  MSDOS
76 <
14 > #if defined(_WIN32) || defined(_WIN64)
15 > #if (RAND_MAX <= 65536)
16   #define random()        ((long)rand()<<16^(long)rand()<<6^(long)rand()>>4)
17 + #else
18 + #define random()        rand()
19 + #endif
20   #define srandom(s)      srand((unsigned)(s))
21  
22 < #define frandom()       (rand()*(1./32768.))
22 > #define frandom()       (rand()*(1./(RAND_MAX+.5)))
23  
24   #else
83 – #ifdef  BSD
25  
85 – extern long  random();
86 –
87 – #define  frandom()      (random()*(1./2147483648.))
88 –
89 – #else
90 –
91 – extern long  lrand48();
92 – extern double  drand48();
93 –
26   #define  random()       lrand48()
27   #define  srandom(s)     srand48((long)(s))
28   #define  frandom()      drand48()
29  
30   #endif
99 – #endif
31  
101 – #ifdef  MC
102 –
103 – #define  urand(i)       frandom()
104 – #define  initurand(n)   (n)
105 –
106 – #else
107 –
32   extern unsigned short   *urperm;
33   extern int      urmask;
34  
35 < #define  urand(i)       ((urperm[(i)&urmask]+frandom())/(urmask+1))
35 > #define  urand(i)       (urmask ? (urperm[(i)&urmask]+frandom())/(urmask+1.) \
36 >                                : frandom())
37  
113 – #endif
114 –
115 – #endif
116 –
117 – #ifdef NOPROTO
118 –
119 – extern int      initurand();
120 – extern int      ilhash();
121 – extern int      urind();
122 – extern void     multisamp();
123 –
124 – #else
38                                  /* defined in urand.c */
39 + extern long     irandom(long modulus);
40 +
41   extern int      initurand(int size);
42 +
43   extern int      ilhash(int *d, int n);
44 <                                /* defined in urind.c */
44 >
45   extern int      urind(int s, int i);
46                                  /* defined in multisamp.c */
47   extern void     multisamp(double t[], int n, double r);
48  
49 +
50 + #ifdef __cplusplus
51 + }
52   #endif
53 + #endif /* _RAD_RANDOM_H_ */
54 +

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