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rdendian.h
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rdendian.h
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/*
* librdkafka - Apache Kafka C library
*
* Copyright (c) 2012-2015 Magnus Edenhill
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. 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.
*
* 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 _RDENDIAN_H_
#define _RDENDIAN_H_
/**
* Provides portable endian-swapping macros/functions.
*
* be64toh()
* htobe64()
* be32toh()
* htobe32()
* be16toh()
* htobe16()
* le64toh()
*/
#ifdef __FreeBSD__
#include <sys/endian.h>
#elif defined __GLIBC__
#include <endian.h>
#ifndef be64toh
/* Support older glibc (<2.9) which lack be64toh */
#include <byteswap.h>
#if __BYTE_ORDER == __BIG_ENDIAN
#define be16toh(x) (x)
#define be32toh(x) (x)
#define be64toh(x) (x)
#define le64toh(x) __bswap_64 (x)
#define le32toh(x) __bswap_32 (x)
#else
#define be16toh(x) __bswap_16 (x)
#define be32toh(x) __bswap_32 (x)
#define be64toh(x) __bswap_64 (x)
#define le64toh(x) (x)
#define le32toh(x) (x)
#endif
#endif
#elif defined __CYGWIN__
#include <endian.h>
#elif defined __BSD__
#include <sys/endian.h>
#elif defined __sun
#include <sys/byteorder.h>
#include <sys/isa_defs.h>
#define __LITTLE_ENDIAN 1234
#define __BIG_ENDIAN 4321
#ifdef _BIG_ENDIAN
#define __BYTE_ORDER __BIG_ENDIAN
#define be64toh(x) (x)
#define be32toh(x) (x)
#define be16toh(x) (x)
#define le16toh(x) ((uint16_t)BSWAP_16(x))
#define le32toh(x) BSWAP_32(x)
#define le64toh(x) BSWAP_64(x)
# else
#define __BYTE_ORDER __LITTLE_ENDIAN
#define be64toh(x) BSWAP_64(x)
#define be32toh(x) ntohl(x)
#define be16toh(x) ntohs(x)
#define le16toh(x) (x)
#define le32toh(x) (x)
#define le64toh(x) (x)
#define htole16(x) (x)
#define htole64(x) (x)
#endif /* __sun */
#elif defined __APPLE__
#include <machine/endian.h>
#include <libkern/OSByteOrder.h>
#if __DARWIN_BYTE_ORDER == __DARWIN_BIG_ENDIAN
#define be64toh(x) (x)
#define be32toh(x) (x)
#define be16toh(x) (x)
#define le16toh(x) OSSwapInt16(x)
#define le32toh(x) OSSwapInt32(x)
#define le64toh(x) OSSwapInt64(x)
#else
#define be64toh(x) OSSwapInt64(x)
#define be32toh(x) OSSwapInt32(x)
#define be16toh(x) OSSwapInt16(x)
#define le16toh(x) (x)
#define le32toh(x) (x)
#define le64toh(x) (x)
#endif
#elif defined(_MSC_VER)
#include <intrin.h>
#define be64toh(x) _byteswap_uint64(x)
#define be32toh(x) _byteswap_ulong(x)
#define be16toh(x) _byteswap_ushort(x)
#define le16toh(x) (x)
#define le32toh(x) (x)
#define le64toh(x) (x)
#elif defined _AIX /* AIX is always big endian */
#define be64toh(x) (x)
#define be32toh(x) (x)
#define be16toh(x) (x)
#define le32toh(x) \
((((x) & 0xff) << 24) | \
(((x) & 0xff00) << 8) | \
(((x) & 0xff0000) >> 8) | \
(((x) & 0xff000000) >> 24))
#define le64toh(x) \
((((x) & 0x00000000000000ffL) << 56) | \
(((x) & 0x000000000000ff00L) << 40) | \
(((x) & 0x0000000000ff0000L) << 24) | \
(((x) & 0x00000000ff000000L) << 8) | \
(((x) & 0x000000ff00000000L) >> 8) | \
(((x) & 0x0000ff0000000000L) >> 24) | \
(((x) & 0x00ff000000000000L) >> 40) | \
(((x) & 0xff00000000000000L) >> 56))
#else
#include <endian.h>
#endif
/*
* On Solaris, be64toh is a function, not a macro, so there's no need to error
* if it's not defined.
*/
#if !defined(__sun) && !defined(be64toh)
#error Missing definition for be64toh
#endif
#ifndef be32toh
#define be32toh(x) ntohl(x)
#endif
#ifndef be16toh
#define be16toh(x) ntohs(x)
#endif
#ifndef htobe64
#define htobe64(x) be64toh(x)
#endif
#ifndef htobe32
#define htobe32(x) be32toh(x)
#endif
#ifndef htobe16
#define htobe16(x) be16toh(x)
#endif
#ifndef htole32
#define htole32(x) le32toh(x)
#endif
#endif /* _RDENDIAN_H_ */