diff options
Diffstat (limited to 'tdescreensaver/xsavers/xs_yarandom.h')
| -rw-r--r-- | tdescreensaver/xsavers/xs_yarandom.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/tdescreensaver/xsavers/xs_yarandom.h b/tdescreensaver/xsavers/xs_yarandom.h new file mode 100644 index 00000000..f803d23c --- /dev/null +++ b/tdescreensaver/xsavers/xs_yarandom.h @@ -0,0 +1,52 @@ +/* xscreensaver, Copyright (c) 1997 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 + +#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__ */ |