ca5bb76d2b
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18012 a1c6a512-1295-4272-9138-f99709370657
128 lines
3.1 KiB
C
128 lines
3.1 KiB
C
/*
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* endianness.h
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*
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* Endian-dependant encoding/decoding, header
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*
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* Copyright (c) 1998, 1999, 2000, 2001, 2004 Beeyond Software Holding
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*
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* Author: Bob Deblier <bob.deblier@telenet.be>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef _ENDIANNESS_H
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#define _ENDIANNESS_H
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#include "beecrypt/beecrypt.h"
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#if defined(__cplusplus) || HAVE_INLINE
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static inline int16_t _swap16(int16_t n)
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{
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return ( ((n & 0xff) << 8) |
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((n & 0xff00) >> 8) );
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}
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# define swap16(n) _swap16(n)
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static inline uint16_t _swapu16(uint16_t n)
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{
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return ( ((n & 0xffU) << 8) |
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((n & 0xff00U) >> 8) );
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}
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# define swapu16(n) _swap16(n)
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# ifdef __arch__swab32
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# define swap32(n) __arch__swab32(n)
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# define swapu32(n) __arch__swab32(n)
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# else
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static inline int32_t _swap32(int32_t n)
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{
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return ( ((n & 0xff) << 24) |
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((n & 0xff00) << 8) |
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((n & 0xff0000) >> 8) |
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((n & 0xff000000) >> 24) );
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}
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# define swap32(n) _swap32(n)
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static inline uint32_t _swapu32(uint32_t n)
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{
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return ( ((n & 0xffU) << 24) |
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((n & 0xff00U) << 8) |
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((n & 0xff0000U) >> 8) |
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((n & 0xff000000U) >> 24) );
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}
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# define swapu32(n) _swapu32(n)
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# endif
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# ifdef __arch__swab64
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# define swap64(n) __arch__swab64(n)
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# define swapu64(n) __arch__swab64(n)
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# else
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static inline int64_t _swap64(int64_t n)
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{
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return ( ((n & ((int64_t) 0xff) ) << 56) |
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((n & ((int64_t) 0xff) << 8) << 40) |
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((n & ((int64_t) 0xff) << 16) << 24) |
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((n & ((int64_t) 0xff) << 24) << 8) |
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((n & ((int64_t) 0xff) << 32) >> 8) |
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((n & ((int64_t) 0xff) << 40) >> 24) |
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((n & ((int64_t) 0xff) << 48) >> 40) |
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((n & ((int64_t) 0xff) << 56) >> 56) );
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}
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# define swap64(n) _swap64(n)
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static inline uint64_t _swapu64(uint64_t n)
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{
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return ( ((n & ((uint64_t) 0xff) ) << 56) |
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((n & ((uint64_t) 0xff) << 8) << 40) |
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((n & ((uint64_t) 0xff) << 16) << 24) |
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((n & ((uint64_t) 0xff) << 24) << 8) |
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((n & ((uint64_t) 0xff) << 32) >> 8) |
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((n & ((uint64_t) 0xff) << 40) >> 24) |
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((n & ((uint64_t) 0xff) << 48) >> 40) |
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((n & ((uint64_t) 0xff) << 56) >> 56) );
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}
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# define swapu64(n) _swapu64(n)
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# endif
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#else
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BEECRYPTAPI
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int16_t swap16 (int16_t);
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BEECRYPTAPI
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uint16_t swapu16(uint16_t);
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BEECRYPTAPI
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int32_t swap32 (int32_t);
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BEECRYPTAPI
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uint32_t swapu32(uint32_t);
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BEECRYPTAPI
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int64_t swap64 (int64_t);
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BEECRYPTAPI
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uint64_t swapu64(uint64_t);
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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