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/* xscreensaver, Copyright (c) 1997 by Jamie Zawinski <[email protected]>
*
* 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
#ifdef VMS
# include "vms-gtod.h"
#endif
/* #define random() ya_random()
#define srandom(i) ya_rand_init(0) */
extern unsigned int ya_random (void);
extern void ya_rand_init (unsigned int);
#if defined (__GNUC__) && (__GNUC__ >= 2)
/* Implement frand using GCC's statement-expression extension. */
# define frand(f) \
({ double tmp = (((double) random()) / \
(((double) ((unsigned int)~0)) / ((double) (f)))); \
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) ((unsigned int)~0)) / ((double) (f)))), \
_frand_tmp_ < 0 ? (-_frand_tmp_) : _frand_tmp_)
#endif /* not GCC2 */
#endif /* __YARANDOM_H__ */
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