260 lines
6.1 KiB
C
260 lines
6.1 KiB
C
/*-
|
|
* Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org>
|
|
* Copyright (c) 2005 Robert N. M. Watson
|
|
* 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.
|
|
*
|
|
* Derived from FreeBSD src/sys/sys/endian.h:1.6.
|
|
* $P4: //depot/projects/trustedbsd/openbsm/compat/endian.h#7 $
|
|
*/
|
|
|
|
#ifndef _COMPAT_ENDIAN_H_
|
|
#define _COMPAT_ENDIAN_H_
|
|
|
|
/*
|
|
* Some systems will have the uint/int types defined here already, others
|
|
* will need stdint.h.
|
|
*/
|
|
#include <stdint.h>
|
|
|
|
/*
|
|
* Some operating systems do not yet have the more recent endian APIs that
|
|
* permit encoding to and decoding from byte streams. For those systems, we
|
|
* implement local non-optimized versions.
|
|
*/
|
|
|
|
static __inline uint16_t
|
|
bswap16(uint16_t int16)
|
|
{
|
|
const unsigned char *from;
|
|
unsigned char *to;
|
|
uint16_t t;
|
|
|
|
from = (const unsigned char *) &int16;
|
|
to = (unsigned char *) &t;
|
|
|
|
to[0] = from[1];
|
|
to[1] = from[0];
|
|
|
|
return (t);
|
|
}
|
|
|
|
static __inline uint32_t
|
|
bswap32(uint32_t int32)
|
|
{
|
|
const unsigned char *from;
|
|
unsigned char *to;
|
|
uint32_t t;
|
|
|
|
from = (const unsigned char *) &int32;
|
|
to = (unsigned char *) &t;
|
|
|
|
to[0] = from[3];
|
|
to[1] = from[2];
|
|
to[2] = from[1];
|
|
to[3] = from[0];
|
|
|
|
return (t);
|
|
}
|
|
|
|
static __inline uint64_t
|
|
bswap64(uint64_t int64)
|
|
{
|
|
const unsigned char *from;
|
|
unsigned char *to;
|
|
uint64_t t;
|
|
|
|
from = (const unsigned char *) &int64;
|
|
to = (unsigned char *) &t;
|
|
|
|
to[0] = from[7];
|
|
to[1] = from[6];
|
|
to[2] = from[5];
|
|
to[3] = from[4];
|
|
to[4] = from[3];
|
|
to[5] = from[2];
|
|
to[6] = from[1];
|
|
to[7] = from[0];
|
|
|
|
return (t);
|
|
}
|
|
|
|
#if defined(BYTE_ORDER) && !defined(_BYTE_ORDER)
|
|
#define _BYTE_ORDER BYTE_ORDER
|
|
#endif
|
|
#if !defined(_BYTE_ORDER)
|
|
#error "Neither BYTE_ORDER nor _BYTE_ORDER defined"
|
|
#endif
|
|
|
|
#if defined(BIG_ENDIAN) && !defined(_BIG_ENDIAN)
|
|
#define _BIG_ENDIAN BIG_ENDIAN
|
|
#endif
|
|
|
|
#if defined(LITTLE_ENDIAN) && !defined(_LITTLE_ENDIAN)
|
|
#define _LITTLE_ENDIAN LITTLE_ENDIAN
|
|
#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)
|
|
{
|
|
unsigned char const *p = (unsigned char const *)pp;
|
|
|
|
return ((p[0] << 8) | p[1]);
|
|
}
|
|
|
|
static __inline uint32_t
|
|
be32dec(const void *pp)
|
|
{
|
|
unsigned char const *p = (unsigned char const *)pp;
|
|
|
|
return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
|
|
}
|
|
|
|
static __inline uint64_t
|
|
be64dec(const void *pp)
|
|
{
|
|
unsigned char const *p = (unsigned char const *)pp;
|
|
|
|
return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4));
|
|
}
|
|
|
|
static __inline uint16_t
|
|
le16dec(const void *pp)
|
|
{
|
|
unsigned char const *p = (unsigned char const *)pp;
|
|
|
|
return ((p[1] << 8) | p[0]);
|
|
}
|
|
|
|
static __inline uint32_t
|
|
le32dec(const void *pp)
|
|
{
|
|
unsigned char const *p = (unsigned char const *)pp;
|
|
|
|
return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
|
|
}
|
|
|
|
static __inline uint64_t
|
|
le64dec(const void *pp)
|
|
{
|
|
unsigned char const *p = (unsigned char const *)pp;
|
|
|
|
return (((uint64_t)le32dec(p + 4) << 32) | le32dec(p));
|
|
}
|
|
|
|
static __inline void
|
|
be16enc(void *pp, uint16_t u)
|
|
{
|
|
unsigned char *p = (unsigned char *)pp;
|
|
|
|
p[0] = (u >> 8) & 0xff;
|
|
p[1] = u & 0xff;
|
|
}
|
|
|
|
static __inline void
|
|
be32enc(void *pp, uint32_t u)
|
|
{
|
|
unsigned char *p = (unsigned char *)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)
|
|
{
|
|
unsigned char *p = (unsigned char *)pp;
|
|
|
|
be32enc(p, u >> 32);
|
|
be32enc(p + 4, u & 0xffffffff);
|
|
}
|
|
|
|
static __inline void
|
|
le16enc(void *pp, uint16_t u)
|
|
{
|
|
unsigned char *p = (unsigned char *)pp;
|
|
|
|
p[0] = u & 0xff;
|
|
p[1] = (u >> 8) & 0xff;
|
|
}
|
|
|
|
static __inline void
|
|
le32enc(void *pp, uint32_t u)
|
|
{
|
|
unsigned char *p = (unsigned char *)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)
|
|
{
|
|
unsigned char *p = (unsigned char *)pp;
|
|
|
|
le32enc(p, u & 0xffffffff);
|
|
le32enc(p + 4, u >> 32);
|
|
}
|
|
|
|
#endif /* _COMPAT_ENDIAN_H_ */
|