95 lines
2.5 KiB
C
95 lines
2.5 KiB
C
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/*
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* Copyright (c) 1998, 1999, 2000, 2001 Virtual Unlimited B.V.
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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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/*!\file endianness.c
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* \brief Endian-dependant encoding/decoding.
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* \author Bob Deblier <bob.deblier@pandora.be>
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*/
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#define BEECRYPT_DLL_EXPORT
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#if HAVE_CONFIG_H
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# include "config.h"
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#endif
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#if HAVE_ENDIAN_H && HAVE_ASM_BYTEORDER_H
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# include <endian.h>
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#endif
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#include "beecrypt/endianness.h"
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#undef swap16
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#undef swapu16
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#undef swap32
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#undef swapu32
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#undef swap64
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#undef swapu64
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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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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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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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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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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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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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