340 lines
9 KiB
C
340 lines
9 KiB
C
/* $NetBSD: endian.h,v 1.28 2009/08/08 21:23:15 christos Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1987, 1991, 1993
|
|
* The Regents of the University of California. 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.
|
|
* 3. Neither the name of the University 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 THE REGENTS 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 REGENTS 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.
|
|
*
|
|
* @(#)endian.h 8.1 (Berkeley) 6/11/93
|
|
*/
|
|
|
|
#ifndef _SYS_ENDIAN_H_
|
|
#define _SYS_ENDIAN_H_
|
|
|
|
#include <sys/featuretest.h>
|
|
|
|
/*
|
|
* Definitions for byte order, according to byte significance from low
|
|
* address to high.
|
|
*/
|
|
#define _LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
|
|
#define _BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
|
|
#define _PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */
|
|
|
|
|
|
#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
|
|
#ifndef _LOCORE
|
|
|
|
/* C-family endian-ness definitions */
|
|
|
|
#include <sys/ansi.h>
|
|
#include <sys/cdefs.h>
|
|
#include <sys/types.h>
|
|
|
|
#ifndef in_addr_t
|
|
typedef __in_addr_t in_addr_t;
|
|
#define in_addr_t __in_addr_t
|
|
#endif
|
|
|
|
#ifndef in_port_t
|
|
typedef __in_port_t in_port_t;
|
|
#define in_port_t __in_port_t
|
|
#endif
|
|
|
|
__BEGIN_DECLS
|
|
uint32_t htonl(uint32_t) __constfunc;
|
|
uint16_t htons(uint16_t) __constfunc;
|
|
uint32_t ntohl(uint32_t) __constfunc;
|
|
uint16_t ntohs(uint16_t) __constfunc;
|
|
__END_DECLS
|
|
|
|
#endif /* !_LOCORE */
|
|
#endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */
|
|
|
|
|
|
#include <machine/endian_machdep.h>
|
|
|
|
/*
|
|
* Define the order of 32-bit words in 64-bit words.
|
|
*/
|
|
#if _BYTE_ORDER == _LITTLE_ENDIAN
|
|
#define _QUAD_HIGHWORD 1
|
|
#define _QUAD_LOWWORD 0
|
|
#endif
|
|
|
|
#if _BYTE_ORDER == _BIG_ENDIAN
|
|
#define _QUAD_HIGHWORD 0
|
|
#define _QUAD_LOWWORD 1
|
|
#endif
|
|
|
|
|
|
#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
|
|
/*
|
|
* Traditional names for byteorder. These are defined as the numeric
|
|
* sequences so that third party code can "#define XXX_ENDIAN" and not
|
|
* cause errors.
|
|
*/
|
|
#define LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
|
|
#define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
|
|
#define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */
|
|
#define BYTE_ORDER _BYTE_ORDER
|
|
|
|
#ifndef _LOCORE
|
|
|
|
#include <machine/bswap.h>
|
|
|
|
/*
|
|
* Macros for network/external number representation conversion.
|
|
*/
|
|
#if BYTE_ORDER == BIG_ENDIAN && !defined(__lint__)
|
|
#define ntohl(x) (x)
|
|
#define ntohs(x) (x)
|
|
#define htonl(x) (x)
|
|
#define htons(x) (x)
|
|
|
|
#define NTOHL(x) (void) (x)
|
|
#define NTOHS(x) (void) (x)
|
|
#define HTONL(x) (void) (x)
|
|
#define HTONS(x) (void) (x)
|
|
|
|
#else /* LITTLE_ENDIAN || !defined(__lint__) */
|
|
|
|
#define ntohl(x) bswap32(__CAST(uint32_t, (x)))
|
|
#define ntohs(x) bswap16(__CAST(uint16_t, (x)))
|
|
#define htonl(x) bswap32(__CAST(uint32_t, (x)))
|
|
#define htons(x) bswap16(__CAST(uint16_t, (x)))
|
|
|
|
#define NTOHL(x) (x) = ntohl(__CAST(uint32_t, (x)))
|
|
#define NTOHS(x) (x) = ntohs(__CAST(uint16_t, (x)))
|
|
#define HTONL(x) (x) = htonl(__CAST(uint32_t, (x)))
|
|
#define HTONS(x) (x) = htons(__CAST(uint16_t, (x)))
|
|
#endif /* LITTLE_ENDIAN || !defined(__lint__) */
|
|
|
|
/*
|
|
* Macros to convert to a specific endianness.
|
|
*/
|
|
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
|
|
|
#define htobe16(x) (x)
|
|
#define htobe32(x) (x)
|
|
#define htobe64(x) (x)
|
|
#define htole16(x) bswap16(__CAST(uint16_t, (x)))
|
|
#define htole32(x) bswap32(__CAST(uint32_t, (x)))
|
|
#define htole64(x) bswap64(__CAST(uint64_t, (x)))
|
|
|
|
#define HTOBE16(x) __CAST(void, (x))
|
|
#define HTOBE32(x) __CAST(void, (x))
|
|
#define HTOBE64(x) __CAST(void, (x))
|
|
#define HTOLE16(x) (x) = bswap16(__CAST(uint16_t, (x)))
|
|
#define HTOLE32(x) (x) = bswap32(__CAST(uint32_t, (x)))
|
|
#define HTOLE64(x) (x) = bswap64(__CAST(uint64_t, (x)))
|
|
|
|
#else /* LITTLE_ENDIAN */
|
|
|
|
#define htobe16(x) bswap16(__CAST(uint16_t, (x)))
|
|
#define htobe32(x) bswap32(__CAST(uint32_t, (x)))
|
|
#define htobe64(x) bswap64(__CAST(uint64_t, (x)))
|
|
#define htole16(x) (x)
|
|
#define htole32(x) (x)
|
|
#define htole64(x) (x)
|
|
|
|
#define HTOBE16(x) (x) = bswap16(__CAST(uint16_t, (x)))
|
|
#define HTOBE32(x) (x) = bswap32(__CAST(uint32_t, (x)))
|
|
#define HTOBE64(x) (x) = bswap64(__CAST(uint64_t, (x)))
|
|
#define HTOLE16(x) __CAST(void, (x))
|
|
#define HTOLE32(x) __CAST(void, (x))
|
|
#define HTOLE64(x) __CAST(void, (x))
|
|
|
|
#endif /* LITTLE_ENDIAN */
|
|
|
|
#define be16toh(x) htobe16(x)
|
|
#define be32toh(x) htobe32(x)
|
|
#define be64toh(x) htobe64(x)
|
|
#define le16toh(x) htole16(x)
|
|
#define le32toh(x) htole32(x)
|
|
#define le64toh(x) htole64(x)
|
|
|
|
#define BE16TOH(x) HTOBE16(x)
|
|
#define BE32TOH(x) HTOBE32(x)
|
|
#define BE64TOH(x) HTOBE64(x)
|
|
#define LE16TOH(x) HTOLE16(x)
|
|
#define LE32TOH(x) HTOLE32(x)
|
|
#define LE64TOH(x) HTOLE64(x)
|
|
|
|
/*
|
|
* Routines to encode/decode big- and little-endian multi-octet values
|
|
* to/from an octet stream.
|
|
*/
|
|
|
|
#if __GNUC_PREREQ__(2, 95)
|
|
|
|
#define __GEN_ENDIAN_ENC(bits, endian) \
|
|
static __inline __unused void \
|
|
endian ## bits ## enc(void *dst, uint ## bits ## _t u) \
|
|
{ \
|
|
u = hto ## endian ## bits (u); \
|
|
__builtin_memcpy(dst, &u, sizeof(u)); \
|
|
}
|
|
|
|
__GEN_ENDIAN_ENC(16, be)
|
|
__GEN_ENDIAN_ENC(32, be)
|
|
__GEN_ENDIAN_ENC(64, be)
|
|
__GEN_ENDIAN_ENC(16, le)
|
|
__GEN_ENDIAN_ENC(32, le)
|
|
__GEN_ENDIAN_ENC(64, le)
|
|
#undef __GEN_ENDIAN_ENC
|
|
|
|
#define __GEN_ENDIAN_DEC(bits, endian) \
|
|
static __inline __unused uint ## bits ## _t \
|
|
endian ## bits ## dec(const void *buf) \
|
|
{ \
|
|
uint ## bits ## _t u; \
|
|
__builtin_memcpy(&u, buf, sizeof(u)); \
|
|
return endian ## bits ## toh (u); \
|
|
}
|
|
|
|
__GEN_ENDIAN_DEC(16, be)
|
|
__GEN_ENDIAN_DEC(32, be)
|
|
__GEN_ENDIAN_DEC(64, be)
|
|
__GEN_ENDIAN_DEC(16, le)
|
|
__GEN_ENDIAN_DEC(32, le)
|
|
__GEN_ENDIAN_DEC(64, le)
|
|
#undef __GEN_ENDIAN_DEC
|
|
|
|
#else /* !(GCC >= 2.95) */
|
|
|
|
static __inline void __unused
|
|
be16enc(void *buf, uint16_t u)
|
|
{
|
|
uint8_t *p = __CAST(uint8_t *, buf);
|
|
|
|
p[0] = __CAST(uint8_t, ((__CAST(unsigned, u) >> 8) & 0xff));
|
|
p[1] = __CAST(uint8_t, (u & 0xff));
|
|
}
|
|
|
|
static __inline void __unused
|
|
le16enc(void *buf, uint16_t u)
|
|
{
|
|
uint8_t *p = __CAST(uint8_t *, buf);
|
|
|
|
p[0] = __CAST(uint8_t, (u & 0xff));
|
|
p[1] = __CAST(uint8_t, ((__CAST(unsigned, u) >> 8) & 0xff));
|
|
}
|
|
|
|
static __inline uint16_t __unused
|
|
be16dec(const void *buf)
|
|
{
|
|
const uint8_t *p = __CAST(const uint8_t *, buf);
|
|
|
|
return __CAST(uint16_t, ((p[0] << 8) | p[1]));
|
|
}
|
|
|
|
static __inline uint16_t __unused
|
|
le16dec(const void *buf)
|
|
{
|
|
const uint8_t *p = __CAST(const uint8_t *, buf);
|
|
|
|
return __CAST(uint16_t, ((p[1] << 8) | p[0]));
|
|
}
|
|
|
|
static __inline void __unused
|
|
be32enc(void *buf, uint32_t u)
|
|
{
|
|
uint8_t *p = __CAST(uint8_t *, buf);
|
|
|
|
p[0] = __CAST(uint8_t, ((u >> 24) & 0xff));
|
|
p[1] = __CAST(uint8_t, ((u >> 16) & 0xff));
|
|
p[2] = __CAST(uint8_t, ((u >> 8) & 0xff));
|
|
p[3] = __CAST(uint8_t, (u & 0xff));
|
|
}
|
|
|
|
static __inline void __unused
|
|
le32enc(void *buf, uint32_t u)
|
|
{
|
|
uint8_t *p = __CAST(uint8_t *, buf);
|
|
|
|
p[0] = __CAST(uint8_t, (u & 0xff));
|
|
p[1] = __CAST(uint8_t, ((u >> 8) & 0xff));
|
|
p[2] = __CAST(uint8_t, ((u >> 16) & 0xff));
|
|
p[3] = __CAST(uint8_t, ((u >> 24) & 0xff));
|
|
}
|
|
|
|
static __inline uint32_t __unused
|
|
be32dec(const void *buf)
|
|
{
|
|
const uint8_t *p = __CAST(const uint8_t *, buf);
|
|
|
|
return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
|
|
}
|
|
|
|
static __inline uint32_t __unused
|
|
le32dec(const void *buf)
|
|
{
|
|
const uint8_t *p = __CAST(const uint8_t *, buf);
|
|
|
|
return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
|
|
}
|
|
|
|
static __inline void __unused
|
|
be64enc(void *buf, uint64_t u)
|
|
{
|
|
uint8_t *p = __CAST(uint8_t *, buf);
|
|
|
|
be32enc(p, __CAST(uint32_t, (u >> 32)));
|
|
be32enc(p + 4, __CAST(uint32_t, (u & 0xffffffffULL)));
|
|
}
|
|
|
|
static __inline void __unused
|
|
le64enc(void *buf, uint64_t u)
|
|
{
|
|
uint8_t *p = __CAST(uint8_t *, buf);
|
|
|
|
le32enc(p, __CAST(uint32_t, (u & 0xffffffffULL)));
|
|
le32enc(p + 4, __CAST(uint32_t, (u >> 32)));
|
|
}
|
|
|
|
static __inline uint64_t __unused
|
|
be64dec(const void *buf)
|
|
{
|
|
const uint8_t *p = (const uint8_t *)buf;
|
|
|
|
return ((__CAST(uint64_t, be32dec(p)) << 32) | be32dec(p + 4));
|
|
}
|
|
|
|
static __inline uint64_t __unused
|
|
le64dec(const void *buf)
|
|
{
|
|
const uint8_t *p = (const uint8_t *)buf;
|
|
|
|
return (le32dec(p) | (__CAST(uint64_t, le32dec(p + 4)) << 32));
|
|
}
|
|
|
|
#endif /* GCC >= 2.95 */
|
|
|
|
#endif /* !_LOCORE */
|
|
#endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */
|
|
#endif /* !_SYS_ENDIAN_H_ */
|