1 /* urandom.h -- define urandom returning a full unsigned long random value.
3 Copyright (C) 1995, 1996 Free Software Foundation, Inc.
5 This file is part of the GNU MP Library.
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.
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.
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. */
22 #if defined (__hpux) || defined (__svr4__) || defined (__SVR4)
23 /* HPUX lacks random(). */
24 static inline unsigned long
32 #if defined(_WIN32) && !(defined(__CYGWIN__) || defined(__CYGWIN32__))
33 /* MS CRT supplies just the poxy rand(), with an upper bound of 0x7fff */
34 static inline unsigned long
37 return rand () ^ (rand () << 16) ^ (rand() << 32);
42 #if defined (__alpha) && !defined (__URANDOM)
43 /* DEC OSF/1 1.2 random() returns a double. */
45 static inline unsigned long
48 return mrand48 () | (mrand48 () << 32);
53 #if BITS_PER_MP_LIMB == 32 && !defined (__URANDOM)
55 static inline unsigned long
58 /* random() returns 31 bits, we want 32. */
59 return random () ^ (random () << 1);
64 #if BITS_PER_MP_LIMB == 64 && !defined (__URANDOM)
66 static inline unsigned long
69 /* random() returns 31 bits, we want 64. */
70 return random () ^ (random () << 31) ^ (random () << 62);