source: Sophya/trunk/SophyaLib/BaseTools/bithelp.h@ 2110

Last change on this file since 2110 was 743, checked in by ansari, 26 years ago

Fichier oublie par Eric pour gnumd5.c - Reza 28/2/2000
File size: 1.2 KB
Line 
1/* bithelp.h - Some bit manipulation helpers
2 * Copyright (C) 1999 Free Software Foundation, Inc.
3 *
4 * This file is part of GnuPG.
5 *
6 * GnuPG is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * GnuPG is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
19 */
20#ifndef G10_BITHELP_H
21#define G10_BITHELP_H
22
23
24/****************
25 * Rotate a 32 bit integer by n bytes
26 */
27#if defined(__GNUC__) && defined(__i386__)
28static inline uint_4
29rol( uint_4 x, int n)
30{
31 __asm__("roll %%cl,%0"
32 :"=r" (x)
33 :"0" (x),"c" (n));
34 return x;
35}
36#else
37#define rol(x,n) ( ((x) << (n)) | ((x) >> (32-(n))) )
38#endif
39
40
41#endif /*G10_BITHELP_H*/
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