Annotation of OpenXM/src/kan96xx/gmp-2.0.2-ssh-2/urandom.h, Revision 1.1
1.1 ! takayama 1: /* urandom.h -- define urandom returning a full unsigned long random value.
! 2:
! 3: Copyright (C) 1995, 1996 Free Software Foundation, Inc.
! 4:
! 5: This file is part of the GNU MP Library.
! 6:
! 7: The GNU MP Library is free software; you can redistribute it and/or modify
! 8: it under the terms of the GNU Library General Public License as published by
! 9: the Free Software Foundation; either version 2 of the License, or (at your
! 10: option) any later version.
! 11:
! 12: The GNU MP Library is distributed in the hope that it will be useful, but
! 13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! 14: or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
! 15: License for more details.
! 16:
! 17: You should have received a copy of the GNU Library General Public License
! 18: along with the GNU MP Library; see the file COPYING.LIB. If not, write to
! 19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
! 20: MA 02111-1307, USA. */
! 21:
! 22: #if BITS_PER_MP_LIMB == 32 && !defined (__URANDOM)
! 23: long random ();
! 24: static inline unsigned long
! 25: urandom ()
! 26: {
! 27: /* random() returns 31 bits, we want 32. */
! 28: return random () ^ (random () << 1);
! 29: }
! 30: #define __URANDOM
! 31: #endif
! 32:
! 33: #if BITS_PER_MP_LIMB == 64 && !defined (__URANDOM)
! 34: long random ();
! 35: #ifdef _LONG_LONG_LIMB
! 36: static inline unsigned long long
! 37: urandom ()
! 38: {
! 39: /* random() returns 31 bits, we want 64. */
! 40: return (unsigned long long) random () ^
! 41: ((unsigned long long) random () << 31) ^
! 42: ((unsigned long long) random () << 62);
! 43: }
! 44: #else
! 45: static inline unsigned long
! 46: urandom ()
! 47: {
! 48: /* random() returns 31 bits, we want 64. */
! 49: return random () ^ (random () << 31) ^ (random () << 62);
! 50: }
! 51: #endif /* _LONG_LONG_LIMB */
! 52: #define __URANDOM
! 53: #endif
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