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