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