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Annotation of OpenXM_contrib/gmp/urandom.h, Revision 1.1

1.1     ! maekawa     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 defined (__hpux) || defined (__svr4__) || defined (__SVR4)
        !            23: /* HPUX lacks random().  */
        !            24: static inline unsigned long
        !            25: urandom ()
        !            26: {
        !            27:   return mrand48 ();
        !            28: }
        !            29: #define __URANDOM
        !            30: #endif
        !            31:
        !            32: #if defined (__alpha) && !defined (__URANDOM)
        !            33: /* DEC OSF/1 1.2 random() returns a double.  */
        !            34: long mrand48 ();
        !            35: static inline unsigned long
        !            36: urandom ()
        !            37: {
        !            38:   return mrand48 () | (mrand48 () << 32);
        !            39: }
        !            40: #define __URANDOM
        !            41: #endif
        !            42:
        !            43: #if BITS_PER_MP_LIMB == 32 && !defined (__URANDOM)
        !            44: long random ();
        !            45: static inline unsigned long
        !            46: urandom ()
        !            47: {
        !            48:   /* random() returns 31 bits, we want 32.  */
        !            49:   return random () ^ (random () << 1);
        !            50: }
        !            51: #define __URANDOM
        !            52: #endif
        !            53:
        !            54: #if BITS_PER_MP_LIMB == 64 && !defined (__URANDOM)
        !            55: long random ();
        !            56: static inline unsigned long
        !            57: urandom ()
        !            58: {
        !            59:   /* random() returns 31 bits, we want 64.  */
        !            60:   return random () ^ (random () << 31) ^ (random () << 62);
        !            61: }
        !            62: #define __URANDOM
        !            63: #endif
        !            64: