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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef WTF_ByteSwap_h
#define WTF_ByteSwap_h
#include "wtf/CPU.h"
#include "wtf/Compiler.h"
#include <stdint.h>
#if COMPILER(MSVC)
#include <stdlib.h>
#endif
namespace WTF {
inline uint32_t wswap32(uint32_t x) { return ((x & 0xffff0000) >> 16) | ((x & 0x0000ffff) << 16); }
#if COMPILER(MSVC)
ALWAYS_INLINE uint64_t bswap64(uint64_t x) { return _byteswap_uint64(x); }
ALWAYS_INLINE uint32_t bswap32(uint32_t x) { return _byteswap_ulong(x); }
ALWAYS_INLINE uint16_t bswap16(uint16_t x) { return _byteswap_ushort(x); }
#else
ALWAYS_INLINE uint64_t bswap64(uint64_t x) { return __builtin_bswap64(x); }
ALWAYS_INLINE uint32_t bswap32(uint32_t x) { return __builtin_bswap32(x); }
// GCC 4.6 lacks __builtin_bswap16. Newer versions have it but we support 4.6.
#if COMPILER(CLANG)
ALWAYS_INLINE uint16_t bswap16(uint16_t x) { return __builtin_bswap16(x); }
#else
inline uint16_t bswap16(uint16_t x) { return ((x & 0xff00) >> 8) | ((x & 0x00ff) << 8); }
#endif
#endif
#if CPU(64BIT)
ALWAYS_INLINE size_t bswapuintptrt(size_t x) { return bswap64(x); }
#else
ALWAYS_INLINE size_t bswapuintptrt(size_t x) { return bswap32(x); }
#endif
} // namespace WTF
#endif // WTF_ByteSwap_h
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