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81 lines
2.8 KiB
C
81 lines
2.8 KiB
C
/* ----> DO NOT REMOVE THE FOLLOWING NOTICE <----
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*
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* Copyright (c) 2014-2015 Datalight, Inc.
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* All Rights Reserved Worldwide.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; use version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but "AS-IS," WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/* Businesses and individuals that for commercial or other reasons cannot
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* comply with the terms of the GPLv2 license may obtain a commercial license
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* before incorporating Reliance Edge into proprietary software for
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* distribution in any form. Visit http://www.datalight.com/reliance-edge for
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* more information.
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*/
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/** @file
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* @brief Implements utilities for performing endian swaps.
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*/
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#include <redfs.h>
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#ifdef REDCONF_ENDIAN_SWAP
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/** @brief Reverse the byte order of a 64-bit number.
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*
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* @param ullToRev Number whose bytes will be reversed
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*
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* @retval @p ullToRev with its bytes reversed.
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*/
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uint64_t RedRev64( uint64_t ullToRev )
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{
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uint64_t ullRet = ullToRev;
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ullRet = ( ( ullRet & UINT64_SUFFIX( 0x00000000FFFFFFFF ) ) << 32U ) | ( ( ullRet & UINT64_SUFFIX( 0xFFFFFFFF00000000 ) ) >> 32U );
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ullRet = ( ( ullRet & UINT64_SUFFIX( 0x0000FFFF0000FFFF ) ) << 16U ) | ( ( ullRet & UINT64_SUFFIX( 0xFFFF0000FFFF0000 ) ) >> 16U );
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ullRet = ( ( ullRet & UINT64_SUFFIX( 0x00FF00FF00FF00FF ) ) << 8U ) | ( ( ullRet & UINT64_SUFFIX( 0xFF00FF00FF00FF00 ) ) >> 8U );
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return ullRet;
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}
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/** @brief Reverse the byte order of a 32-bit number.
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*
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* @param ulToRev Number whose bytes will be reversed
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*
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* @retval @p ulToRev with its bytes reversed.
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*/
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uint32_t RedRev32( uint32_t ulToRev )
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{
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return ( ( ulToRev & 0x000000FFU ) << 24U )
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| ( ( ulToRev & 0x0000FF00U ) << 8U )
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| ( ( ulToRev & 0x00FF0000U ) >> 8U )
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| ( ( ulToRev & 0xFF000000U ) >> 24U );
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}
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/** @brief Reverse the byte order of a 16-bit number.
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*
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* @param uToRev Number whose bytes will be reversed
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*
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* @retval @p uToRev with its bytes reversed.
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*/
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uint16_t RedRev16( uint16_t uToRev )
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{
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return ( ( uToRev & 0xFF00U ) >> 8U )
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| ( ( uToRev & 0x00FFU ) << 8U );
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}
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#endif /* ifdef REDCONF_ENDIAN_SWAP */
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