/*-
* Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org>
* 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 AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#ifndef _SYS_ENDIAN_H_
#define _SYS_ENDIAN_H_
#include <sys/cdefs.h>
#include <rtems/endian.h>
/*
* General byte order swapping functions.
*/
#define bswap16(x) CPU_swap_u16(x)
#define bswap32(x) CPU_swap_u32(x)
static __inline uint64_t
bswap64(uint64_t v)
{
#ifdef __GNUC__
return __builtin_bswap64(v);
#else
return ((v >> 56) | ((v >> 40) & 0xff00) | ((v >> 24) & 0xff0000) |
((v >> 8) & 0xff000000) | ((v << 8) & ((uint64_t)0xff << 32)) |
((v << 24) & ((uint64_t)0xff << 40)) |
((v << 40) & ((uint64_t)0xff << 48)) | ((v << 56)));
#endif
}
/*
* Host to big endian, host to little endian, big endian to host, and little
* endian to host byte order functions as detailed in byteorder(9).
*/
#if BYTE_ORDER == LITTLE_ENDIAN
#define htobe16(x) bswap16((x))
#define htobe32(x) bswap32((x))
#define htobe64(x) bswap64((x))
#define htole16(x) ((uint16_t)(x))
#define htole32(x) ((uint32_t)(x))
#define htole64(x) ((uint64_t)(x))
#define be16toh(x) bswap16((x))
#define be32toh(x) bswap32((x))
#define be64toh(x) bswap64((x))
#define le16toh(x) ((uint16_t)(x))
#define le32toh(x) ((uint32_t)(x))
#define le64toh(x) ((uint64_t)(x))
#else /* BYTE_ORDER != LITTLE_ENDIAN */
#define htobe16(x) ((uint16_t)(x))
#define htobe32(x) ((uint32_t)(x))
#define htobe64(x) ((uint64_t)(x))
#define htole16(x) bswap16((x))
#define htole32(x) bswap32((x))
#define htole64(x) bswap64((x))
#define be16toh(x) ((uint16_t)(x))
#define be32toh(x) ((uint32_t)(x))
#define be64toh(x) ((uint64_t)(x))
#define le16toh(x) bswap16((x))
#define le32toh(x) bswap32((x))
#define le64toh(x) bswap64((x))
#endif /* BYTE_ORDER == LITTLE_ENDIAN */
/* Alignment-agnostic encode/decode bytestream to/from little/big endian. */
static __inline uint16_t
be16dec(const void *pp)
{
uint8_t const *p = (uint8_t const *)pp;
return (((unsigned)p[0] << 8) | p[1]);
}
static __inline uint32_t
be32dec(const void *pp)
{
uint8_t const *p = (uint8_t const *)pp;
return (((uint32_t)p[0] << 24) | ((uint32_t)p[1] << 16) |
((uint32_t)p[2] << 8) | p[3]);
}
static __inline uint64_t
be64dec(const void *pp)
{
uint8_t const *p = (uint8_t const *)pp;
return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4));
}
static __inline uint16_t
le16dec(const void *pp)
{
uint8_t const *p = (uint8_t const *)pp;
return (((unsigned)p[1] << 8) | p[0]);
}
static __inline uint32_t
le32dec(const void *pp)
{
uint8_t const *p = (uint8_t const *)pp;
return (((uint32_t)p[3] << 24) | ((uint32_t)p[2] << 16) |
((uint32_t)p[1] << 8) | p[0]);
}
static __inline uint64_t
le64dec(const void *pp)
{
uint8_t const *p = (uint8_t const *)pp;
return (((uint64_t)le32dec(p + 4) << 32) | le32dec(p));
}
static __inline void
be16enc(void *pp, uint16_t u)
{
uint8_t *p = (uint8_t *)pp;
p[0] = (u >> 8) & 0xff;
p[1] = u & 0xff;
}
static __inline void
be32enc(void *pp, uint32_t u)
{
uint8_t *p = (uint8_t *)pp;
p[0] = (u >> 24) & 0xff;
p[1] = (u >> 16) & 0xff;
p[2] = (u >> 8) & 0xff;
p[3] = u & 0xff;
}
static __inline void
be64enc(void *pp, uint64_t u)
{
uint8_t *p = (uint8_t *)pp;
be32enc(p, (uint32_t)(u >> 32));
be32enc(p + 4, (uint32_t)(u & 0xffffffffU));
}
static __inline void
le16enc(void *pp, uint16_t u)
{
uint8_t *p = (uint8_t *)pp;
p[0] = u & 0xff;
p[1] = (u >> 8) & 0xff;
}
static __inline void
le32enc(void *pp, uint32_t u)
{
uint8_t *p = (uint8_t *)pp;
p[0] = u & 0xff;
p[1] = (u >> 8) & 0xff;
p[2] = (u >> 16) & 0xff;
p[3] = (u >> 24) & 0xff;
}
static __inline void
le64enc(void *pp, uint64_t u)
{
uint8_t *p = (uint8_t *)pp;
le32enc(p, (uint32_t)(u & 0xffffffffU));
le32enc(p + 4, (uint32_t)(u >> 32));
}
#endif /* _SYS_ENDIAN_H_ */