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/* nbdkit
* Copyright Red Hat
*
* 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 Red Hat 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 RED HAT 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 RED HAT 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.
*/
/* The job of this header is to define macros (or functions) called
* things like 'htobe32' and 'le64toh' which byte swap N-bit integers
* between host representation, and little and big endian. Also
* bswap_16, bswap_32 and bswap_64 which simply swap endianness.
*
* The core code and plugins in nbdkit uses these names and relies on
* this header to provide the platform-specific implementation. On
* GNU/Linux these are defined in <endian.h> and <byteswap.h> but
* other platforms have other requirements.
*/
#ifndef NBDKIT_BYTE_SWAPPING_H
#define NBDKIT_BYTE_SWAPPING_H
#ifdef HAVE_BYTESWAP_H
#include <byteswap.h>
#endif
#ifdef HAVE_ENDIAN_H
#include <endian.h>
#endif
#ifdef HAVE_SYS_ENDIAN_H
#include <sys/endian.h>
#endif
#ifdef __HAIKU__
#include <ByteOrder.h>
#define htobe16(x) B_HOST_TO_BENDIAN_INT16 (x)
#define htole16(x) B_HOST_TO_LENDIAN_INT16 (x)
#define be16toh(x) B_BENDIAN_TO_HOST_INT16 (x)
#define le16toh(x) B_LENDIAN_TO_HOST_INT16 (x)
#define htobe32(x) B_HOST_TO_BENDIAN_INT32 (x)
#define htole32(x) B_HOST_TO_LENDIAN_INT32 (x)
#define be32toh(x) B_BENDIAN_TO_HOST_INT32 (x)
#define le32toh(x) B_LENDIAN_TO_HOST_INT32 (x)
#define htobe64(x) B_HOST_TO_BENDIAN_INT64 (x)
#define htole64(x) B_HOST_TO_LENDIAN_INT64 (x)
#define be64toh(x) B_BENDIAN_TO_HOST_INT64 (x)
#define le64toh(x) B_LENDIAN_TO_HOST_INT64 (x)
#endif
/* If we didn't define bswap_16, bswap_32 and bswap_64 already above,
* create macros. GCC >= 4.8 and Clang have builtins.
*/
#ifndef bswap_16
#define bswap_16 __builtin_bswap16
#endif
#ifndef bswap_32
#define bswap_32 __builtin_bswap32
#endif
#ifndef bswap_64
#define bswap_64 __builtin_bswap64
#endif
/* If we didn't define htobe* above then define them in terms of
* bswap_* macros.
*/
#ifndef htobe32
# ifndef WORDS_BIGENDIAN /* little endian */
# define htobe16(x) bswap_16 (x)
# define htole16(x) (x)
# define be16toh(x) bswap_16 (x)
# define le16toh(x) (x)
# define htobe32(x) bswap_32 (x)
# define htole32(x) (x)
# define be32toh(x) bswap_32 (x)
# define le32toh(x) (x)
# define htobe64(x) bswap_64 (x)
# define htole64(x) (x)
# define be64toh(x) bswap_64 (x)
# define le64toh(x) (x)
# else /* big endian */
# define htobe16(x) (x)
# define htole16(x) bswap_16 (x)
# define be16toh(x) (x)
# define le16toh(x) bswap_16 (x)
# define htobe32(x) (x)
# define htole32(x) bswap_32 (x)
# define be32toh(x) (x)
# define le32toh(x) bswap_32 (x)
# define htobe64(x) (x)
# define htole64(x) bswap_64 (x)
# define be64toh(x) (x)
# define le64toh(x) bswap_64 (x)
# endif
#endif
#endif /* NBDKIT_BYTE_SWAPPING_H */
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