83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
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/* ----> DO NOT REMOVE THE FOLLOWING NOTICE <----
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Copyright (c) 2014-2015 Datalight, Inc.
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All Rights Reserved Worldwide.
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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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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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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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@param ullToRev Number whose bytes will be reversed
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@retval @p ullToRev with its bytes reversed.
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*/
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uint64_t RedRev64(
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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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@param ulToRev Number whose bytes will be reversed
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@retval @p ulToRev with its bytes reversed.
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*/
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uint32_t RedRev32(
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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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@param uToRev Number whose bytes will be reversed
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@retval @p uToRev with its bytes reversed.
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*/
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uint16_t RedRev16(
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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
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