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diff --git a/uisimulator/yarandom.h b/uisimulator/yarandom.h
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1/* xscreensaver, Copyright (c) 1997, 1998 by Jamie Zawinski <jwz@jwz.org>
2 *
3 * Permission to use, copy, modify, distribute, and sell this software and its
4 * documentation for any purpose is hereby granted without fee, provided that
5 * the above copyright notice appear in all copies and that both that
6 * copyright notice and this permission notice appear in supporting
7 * documentation. No representations are made about the suitability of this
8 * software for any purpose. It is provided "as is" without express or
9 * implied warranty.
10 */
11
12#ifndef __YARANDOM_H__
13#define __YARANDOM_H__
14
15#undef random
16#undef rand
17#undef drand48
18#undef srandom
19#undef srand
20#undef srand48
21#undef frand
22#undef RAND_MAX
23
24#ifdef VMS
25# include "vms-gtod.h"
26#endif
27
28extern unsigned int ya_random (void);
29extern void ya_rand_init (unsigned int);
30
31#define random() ya_random()
32#define RAND_MAX 0x7FFFFFFF
33
34/*#define srandom(i) ya_rand_init(0)*/
35
36/* Define these away to keep people from using the wrong APIs in xscreensaver.
37 */
38#define rand __ERROR_use_random_not_rand_in_xscreensaver__
39#define drand48 __ERROR_use_random_not_drand48_in_xscreensaver__
40#define srandom __ERROR_do_not_call_srandom_in_xscreensaver__
41#define srand __ERROR_do_not_call_srand_in_xscreensaver__
42#define srand48 __ERROR_do_not_call_srand48_in_xscreensaver__
43#define ya_rand_init __ERROR_do_not_call_ya_rand_init_in_xscreensaver__
44
45
46#if defined (__GNUC__) && (__GNUC__ >= 2)
47 /* Implement frand using GCC's statement-expression extension. */
48
49# define frand(f) \
50 ({ double tmp = (((double) random()) / \
51 (((double) ((unsigned int)~0)) / ((double) (f)))); \
52 tmp < 0 ? (-tmp) : tmp; })
53
54#else /* not GCC2 - implement frand using a global variable.*/
55
56static double _frand_tmp_;
57# define frand(f) \
58 (_frand_tmp_ = (((double) random()) / \
59 (((double) ((unsigned int)~0)) / ((double) (f)))), \
60 _frand_tmp_ < 0 ? (-_frand_tmp_) : _frand_tmp_)
61
62#endif /* not GCC2 */
63
64#endif /* __YARANDOM_H__ */