232 lines
5.4 KiB
C
232 lines
5.4 KiB
C
/*-
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* Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org>
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* All rights reserved.
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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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* 1. 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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* 2. 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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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _ENDIAN_H_
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#define _ENDIAN_H_
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#include <stdint.h>
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#include "byteswap.h"
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#ifndef BIG_ENDIAN
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#define BIG_ENDIAN 4321
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#endif
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#ifndef LITTLE_ENDIAN
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#define LITTLE_ENDIAN 1234
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#endif
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#ifndef BYTE_ORDER
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#ifdef __IEEE_LITTLE_ENDIAN
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#define BYTE_ORDER LITTLE_ENDIAN
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#else
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#define BYTE_ORDER BIG_ENDIAN
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#endif
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#endif
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#define _UINT8_T_DECLARED
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#ifndef _UINT8_T_DECLARED
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typedef __uint8_t uint8_t;
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#define _UINT8_T_DECLARED
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#endif
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#define _UINT16_T_DECLARED
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#ifndef _UINT16_T_DECLARED
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typedef __uint16_t uint16_t;
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#define _UINT16_T_DECLARED
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#endif
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#define _UINT32_T_DECLARED
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#ifndef _UINT32_T_DECLARED
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typedef __uint32_t uint32_t;
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#define _UINT32_T_DECLARED
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#endif
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#define _UINT64_T_DECLARED
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#ifndef _UINT64_T_DECLARED
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typedef __uint64_t uint64_t;
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#define _UINT64_T_DECLARED
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#endif
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/*
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* General byte order swapping functions.
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*/
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#define bswap16(x) __bswap16(x)
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#define bswap32(x) __bswap32(x)
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#define bswap64(x) __bswap64(x)
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/*
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* Host to big endian, host to little endian, big endian to host, and little
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* endian to host byte order functions as detailed in byteorder(9).
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*/
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#if 1 //BYTE_ORDER == _LITTLE_ENDIAN
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#define __bswap16 __bswap_16
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#define __bswap32 __bswap_32
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#define htobe16(x) bswap16((x))
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#define htobe32(x) bswap32((x))
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#define htobe64(x) bswap64((x))
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#define htole16(x) ((uint16_t)(x))
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#define htole32(x) ((uint32_t)(x))
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#define htole64(x) ((uint64_t)(x))
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#define be16toh(x) bswap16((x))
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#define be32toh(x) bswap32((x))
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#define be64toh(x) bswap64((x))
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#define le16toh(x) ((uint16_t)(x))
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#define le32toh(x) ((uint32_t)(x))
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#define le64toh(x) ((uint64_t)(x))
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#ifndef htons
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#define htons htobe16
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#endif //htons
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#else /* _BYTE_ORDER != _LITTLE_ENDIAN */
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#define htobe16(x) ((uint16_t)(x))
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#define htobe32(x) ((uint32_t)(x))
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#define htobe64(x) ((uint64_t)(x))
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#define htole16(x) bswap16((x))
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#define htole32(x) bswap32((x))
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#define htole64(x) bswap64((x))
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#define be16toh(x) ((uint16_t)(x))
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#define be32toh(x) ((uint32_t)(x))
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#define be64toh(x) ((uint64_t)(x))
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#define le16toh(x) bswap16((x))
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#define le32toh(x) bswap32((x))
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#define le64toh(x) bswap64((x))
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#endif /* _BYTE_ORDER == _LITTLE_ENDIAN */
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/* Alignment-agnostic encode/decode bytestream to/from little/big endian. */
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#define INLINE __inline__
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static INLINE uint16_t
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be16dec(const void *pp)
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{
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uint8_t const *p = (uint8_t const *)pp;
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return ((p[0] << 8) | p[1]);
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}
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static INLINE uint32_t
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be32dec(const void *pp)
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{
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uint8_t const *p = (uint8_t const *)pp;
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return (((unsigned)p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
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}
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static INLINE uint64_t
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be64dec(const void *pp)
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{
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uint8_t const *p = (uint8_t const *)pp;
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return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4));
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}
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static INLINE uint16_t
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le16dec(const void *pp)
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{
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uint8_t const *p = (uint8_t const *)pp;
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return ((p[1] << 8) | p[0]);
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}
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static INLINE uint32_t
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le32dec(const void *pp)
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{
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uint8_t const *p = (uint8_t const *)pp;
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return (((unsigned)p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
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}
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static INLINE uint64_t
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le64dec(const void *pp)
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{
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uint8_t const *p = (uint8_t const *)pp;
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return (((uint64_t)le32dec(p + 4) << 32) | le32dec(p));
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}
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static INLINE void
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be16enc(void *pp, uint16_t u)
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{
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uint8_t *p = (uint8_t *)pp;
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p[0] = (u >> 8) & 0xff;
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p[1] = u & 0xff;
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}
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static INLINE void
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be32enc(void *pp, uint32_t u)
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{
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uint8_t *p = (uint8_t *)pp;
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p[0] = (u >> 24) & 0xff;
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p[1] = (u >> 16) & 0xff;
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p[2] = (u >> 8) & 0xff;
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p[3] = u & 0xff;
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}
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static INLINE void
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be64enc(void *pp, uint64_t u)
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{
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uint8_t *p = (uint8_t *)pp;
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be32enc(p, (uint32_t)(u >> 32));
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be32enc(p + 4, (uint32_t)(u & 0xffffffffU));
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}
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static INLINE void
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le16enc(void *pp, uint16_t u)
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{
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uint8_t *p = (uint8_t *)pp;
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p[0] = u & 0xff;
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p[1] = (u >> 8) & 0xff;
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}
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static INLINE void
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le32enc(void *pp, uint32_t u)
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{
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uint8_t *p = (uint8_t *)pp;
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p[0] = u & 0xff;
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p[1] = (u >> 8) & 0xff;
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p[2] = (u >> 16) & 0xff;
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p[3] = (u >> 24) & 0xff;
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}
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static INLINE void
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le64enc(void *pp, uint64_t u)
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{
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uint8_t *p = (uint8_t *)pp;
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le32enc(p, (uint32_t)(u & 0xffffffffU));
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le32enc(p + 4, (uint32_t)(u >> 32));
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}
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#endif /* _ENDIAN_H_ */
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