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include/beecrypt/endianness.h

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

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