Annotation of OpenXM/src/kan96xx/gmp-2.0.2-ssh-2/urandom.h, Revision 1.1.1.1
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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