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78 lines
2.7 KiB
78 lines
2.7 KiB
/* libFLAC - Free Lossless Audio Codec library
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* Copyright (C) 2012-2014 Xiph.org Foundation
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of the Xiph.org Foundation nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* It is assumed that this header will be included after "config.h". */
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#if HAVE_BSWAP32 /* GCC and Clang */
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/* GCC prior to 4.8 didn't provide bswap16 on x86_64 */
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#if ! HAVE_BSWAP16
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static inline unsigned short __builtin_bswap16(unsigned short a)
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{
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return (a<<8)|(a>>8);
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}
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#endif
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#define ENDSWAP_16(x) (__builtin_bswap16 (x))
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#define ENDSWAP_32(x) (__builtin_bswap32 (x))
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#elif defined _MSC_VER /* Windows. Apparently in <stdlib.h>. */
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#define ENDSWAP_16(x) (_byteswap_ushort (x))
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#define ENDSWAP_32(x) (_byteswap_ulong (x))
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#elif defined HAVE_BYTESWAP_H /* Linux */
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#include <byteswap.h>
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#define ENDSWAP_16(x) (bswap_16 (x))
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#define ENDSWAP_32(x) (bswap_32 (x))
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#else
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#define ENDSWAP_16(x) ((((x) >> 8) & 0xFF) | (((x) & 0xFF) << 8))
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#define ENDSWAP_32(x) ((((x) >> 24) & 0xFF) | (((x) >> 8) & 0xFF00) | (((x) & 0xFF00) << 8) | (((x) & 0xFF) << 24))
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#endif
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/* Host to little-endian byte swapping. */
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#if CPU_IS_BIG_ENDIAN
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#define H2LE_16(x) ENDSWAP_16 (x)
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#define H2LE_32(x) ENDSWAP_32 (x)
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#else
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#define H2LE_16(x) (x)
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#define H2LE_32(x) (x)
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#endif
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