diff options
Diffstat (limited to 'contrib/libgmp/urandom.h')
-rw-r--r-- | contrib/libgmp/urandom.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/contrib/libgmp/urandom.h b/contrib/libgmp/urandom.h new file mode 100644 index 0000000..994e7bd --- /dev/null +++ b/contrib/libgmp/urandom.h @@ -0,0 +1,64 @@ +/* urandom.h -- define urandom returning a full unsigned long random value. + +Copyright (C) 1995, 1996 Free Software Foundation, Inc. + +This file is part of the GNU MP Library. + +The GNU MP Library is free software; you can redistribute it and/or modify +it under the terms of the GNU Library General Public License as published by +the Free Software Foundation; either version 2 of the License, or (at your +option) any later version. + +The GNU MP Library is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public +License for more details. + +You should have received a copy of the GNU Library General Public License +along with the GNU MP Library; see the file COPYING.LIB. If not, write to +the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, +MA 02111-1307, USA. */ + +#if defined (__hpux) || defined (__svr4__) || defined (__SVR4) +/* HPUX lacks random(). */ +static inline unsigned long +urandom () +{ + return mrand48 (); +} +#define __URANDOM +#endif + +#if defined (__alpha) && !defined (__URANDOM) +/* DEC OSF/1 1.2 random() returns a double. */ +long mrand48 (); +static inline unsigned long +urandom () +{ + return mrand48 () | (mrand48 () << 32); +} +#define __URANDOM +#endif + +#if BITS_PER_MP_LIMB == 32 && !defined (__URANDOM) +long random (); +static inline unsigned long +urandom () +{ + /* random() returns 31 bits, we want 32. */ + return random () ^ (random () << 1); +} +#define __URANDOM +#endif + +#if BITS_PER_MP_LIMB == 64 && !defined (__URANDOM) +long random (); +static inline unsigned long +urandom () +{ + /* random() returns 31 bits, we want 64. */ + return random () ^ (random () << 31) ^ (random () << 62); +} +#define __URANDOM +#endif + |