chromium/third_party/flac/include/share/endswap.h

/* libFLAC - Free Lossless Audio Codec library
 * Copyright (C) 2012-2022  Xiph.Org Foundation
 *
 * 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 the Xiph.org Foundation 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 FOUNDATION 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.
 */

/* It is assumed that this header will be included after "config.h". */

#ifdef HAVE_BSWAP32 /* GCC and Clang */

/* GCC prior to 4.8 didn't provide bswap16 on x86_64 */
#ifndef HAVE_BSWAP16
static inline unsigned short __builtin_bswap16(unsigned short a)
{
	return (a<<8)|(a>>8);
}
#endif

#define ENDSWAP_16 …
#define ENDSWAP_32 …
#define ENDSWAP_64 …

#elif defined _MSC_VER /* Windows */

#include <stdlib.h>

#define ENDSWAP_16 …
#define ENDSWAP_32 …
#define ENDSWAP_64 …

#elif defined HAVE_BYTESWAP_H		/* Linux */

#include <byteswap.h>

#define ENDSWAP_16 …
#define ENDSWAP_32 …
#define ENDSWAP_64 …

#else

#define ENDSWAP_16(x) …
#define ENDSWAP_32(x) …
#define ENDSWAP_64(x) …

#endif

/* Host to little-endian byte swapping (for MD5 calculation) */
#if CPU_IS_BIG_ENDIAN

#define H2LE_16 …
#define H2LE_32 …

#else

#define H2LE_16(x) …
#define H2LE_32(x) …

#endif