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/* xscreensaver, Copyright (c) 1997, 1998, 2003 by Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation. No representations are made about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*/
#ifndef __YARANDOM_H__
#define __YARANDOM_H__
#undef random
#undef rand
#undef drand48
#undef srandom
#undef srand
#undef srand48
#undef frand
#undef RAND_MAX
#ifdef VMS
# include "vms-gtod.h"
#endif
extern unsigned int ya_random (void);
extern void ya_rand_init (unsigned int);
#define random() ya_random()
#define RAND_MAX 0xFFFFFFFF
/*#define srandom(i) ya_rand_init(0)*/
/* Define these away to keep people from using the wrong APIs in xscreensaver.
*/
#define rand __ERROR_use_random_not_rand_in_xscreensaver__
#define drand48 __ERROR_use_frand_not_drand48_in_xscreensaver__
#define srandom __ERROR_do_not_call_srandom_in_xscreensaver__
#define srand __ERROR_do_not_call_srand_in_xscreensaver__
#define srand48 __ERROR_do_not_call_srand48_in_xscreensaver__
#define ya_rand_init __ERROR_do_not_call_ya_rand_init_in_xscreensaver__
#if defined (__GNUC__) && (__GNUC__ >= 2)
/* Implement frand using GCC's statement-expression extension. */
# define frand(f) \
__extension__ \
({ double tmp = ((((double) random()) * ((double) (f))) / \
((double) ((unsigned int)~0))); \
tmp < 0 ? (-tmp) : tmp; })
#else /* not GCC2 - implement frand using a global variable.*/
static double _frand_tmp_;
# define frand(f) \
(_frand_tmp_ = ((((double) random()) * ((double) (f))) / \
((double) ((unsigned int)~0))), \
_frand_tmp_ < 0 ? (-_frand_tmp_) : _frand_tmp_)
#endif /* not GCC2 */
#endif /* __YARANDOM_H__ */
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