Main Page | Modules | Namespace List | Class Hierarchy | Class List | Directories | File List | Namespace Members | Class Members | File Members | Related Pages

endianness.h

Go to the documentation of this file.
00001 /*
00002  * endianness.h
00003  *
00004  * Endian-dependant encoding/decoding, header
00005  *
00006  * Copyright (c) 1998, 1999, 2000, 2001, 2004 Beeyond Software Holding
00007  *
00008  * Author: Bob Deblier <bob.deblier@telenet.be>
00009  *
00010  * This library is free software; you can redistribute it and/or
00011  * modify it under the terms of the GNU Lesser General Public
00012  * License as published by the Free Software Foundation; either
00013  * version 2.1 of the License, or (at your option) any later version.
00014  *
00015  * This library is distributed in the hope that it will be useful,
00016  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00017  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018  * Lesser General Public License for more details.
00019  *
00020  * You should have received a copy of the GNU Lesser General Public
00021  * License along with this library; if not, write to the Free Software
00022  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00023  *
00024  */
00025 
00026 #ifndef _ENDIANNESS_H
00027 #define _ENDIANNESS_H
00028 
00029 #include "beecrypt/beecrypt.h"
00030 
00031 #if defined(__cplusplus) || HAVE_INLINE
00032 
00033 static inline int16_t _swap16(int16_t n)
00034 {
00035     return (    ((n & 0xff) << 8) |
00036                 ((n & 0xff00) >> 8) );
00037 }
00038 # define swap16(n) _swap16(n)
00039 
00040 static inline uint16_t _swapu16(uint16_t n)
00041 {
00042     return (    ((n & 0xffU) << 8) |
00043                 ((n & 0xff00U) >> 8) );
00044 }
00045 # define swapu16(n) _swap16(n)
00046 
00047 # ifdef __arch__swab32
00048 #  define swap32(n) __arch__swab32(n)
00049 #  define swapu32(n) __arch__swab32(n)
00050 # else
00051 
00052 static inline int32_t _swap32(int32_t n)
00053 {
00054     return (    ((n & 0xff) << 24) |
00055                 ((n & 0xff00) << 8) |
00056                 ((n & 0xff0000) >> 8) |
00057                 ((n & 0xff000000) >> 24) );
00058 }
00059 #  define swap32(n) _swap32(n)
00060 
00061 static inline uint32_t _swapu32(uint32_t n)
00062 {
00063     return (    ((n & 0xffU) << 24) |
00064                 ((n & 0xff00U) << 8) |
00065                 ((n & 0xff0000U) >> 8) |
00066                 ((n & 0xff000000U) >> 24) );
00067 }
00068 #  define swapu32(n) _swapu32(n)
00069 
00070 # endif
00071 
00072 # ifdef __arch__swab64
00073 #  define swap64(n) __arch__swab64(n)
00074 #  define swapu64(n) __arch__swab64(n)
00075 # else
00076 
00077 static inline int64_t _swap64(int64_t n)
00078 {
00079     return (    ((n & ((int64_t) 0xff)      ) << 56) |
00080                 ((n & ((int64_t) 0xff) <<  8) << 40) |
00081                 ((n & ((int64_t) 0xff) << 16) << 24) |
00082                 ((n & ((int64_t) 0xff) << 24) <<  8) |
00083                 ((n & ((int64_t) 0xff) << 32) >>  8) |
00084                 ((n & ((int64_t) 0xff) << 40) >> 24) |
00085                 ((n & ((int64_t) 0xff) << 48) >> 40) |
00086                 ((n & ((int64_t) 0xff) << 56) >> 56) );
00087 }
00088 #  define swap64(n) _swap64(n)
00089 
00090 static inline uint64_t _swapu64(uint64_t n)
00091 {
00092     return (    ((n & ((uint64_t) 0xff)      ) << 56) |
00093                 ((n & ((uint64_t) 0xff) <<  8) << 40) |
00094                 ((n & ((uint64_t) 0xff) << 16) << 24) |
00095                 ((n & ((uint64_t) 0xff) << 24) <<  8) |
00096                 ((n & ((uint64_t) 0xff) << 32) >>  8) |
00097                 ((n & ((uint64_t) 0xff) << 40) >> 24) |
00098                 ((n & ((uint64_t) 0xff) << 48) >> 40) |
00099                 ((n & ((uint64_t) 0xff) << 56) >> 56) );
00100 }
00101 #  define swapu64(n) _swapu64(n)
00102 
00103 # endif
00104 
00105 #else
00106 BEECRYPTAPI
00107  int16_t swap16 (int16_t);
00108 BEECRYPTAPI
00109 uint16_t swapu16(uint16_t);
00110 BEECRYPTAPI
00111  int32_t swap32 (int32_t);
00112 BEECRYPTAPI
00113 uint32_t swapu32(uint32_t);
00114 BEECRYPTAPI
00115  int64_t swap64 (int64_t);
00116 BEECRYPTAPI
00117 uint64_t swapu64(uint64_t);
00118 #endif
00119 
00120 #ifdef __cplusplus
00121 extern "C" {
00122 #endif
00123 
00124 #ifdef __cplusplus
00125 }
00126 #endif
00127 
00128 #endif

Generated on Mon Jun 20 08:10:33 2005 for BeeCrypt by  doxygen 1.4.0