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zfs/lib/libspl/include/os/freebsd/sys/byteorder.h

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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* University Copyright- Copyright (c) 1982, 1986, 1988
* The Regents of the University of California
* All Rights Reserved
*
* University Acknowledgment- Portions of this document are derived from
* software developed by the University of California, Berkeley, and its
* contributors.
*/
#ifndef _SYS_BYTEORDER_H
#define _SYS_BYTEORDER_H
/*
* XXX FIXME
* on FreeBSD _BIG_ENDIAN is defined on all architectures so we have
* to exclude _MACHINE_ENDIAN_H_ and define the bulk of it here
*/
#include <sys/cdefs.h>
#include <sys/_types.h>
/*
* Define the order of 32-bit words in 64-bit words.
*/
#define _QUAD_HIGHWORD 1
#define _QUAD_LOWWORD 0
/*
* Definitions for byte order, according to byte significance from low
* address to high.
*/
#undef _LITTLE_ENDIAN
/* LSB first: i386, vax */
#define _LITTLE_ENDIAN 1234
/* LSB first in word, MSW first in long */
#define _PDP_ENDIAN 3412
#define _BYTE_ORDER _LITTLE_ENDIAN
/*
* Deprecated variants that don't have enough underscores to be useful in more
* strict namespaces.
*/
#if __BSD_VISIBLE
#define LITTLE_ENDIAN _LITTLE_ENDIAN
#define PDP_ENDIAN _PDP_ENDIAN
#define BYTE_ORDER _BYTE_ORDER
#endif
#define __bswap16_gen(x) (__uint16_t)((x) << 8 | (x) >> 8)
#define __bswap32_gen(x) \
(((__uint32_t)__bswap16((x) & 0xffff) << 16) | __bswap16((x) >> 16))
#define __bswap64_gen(x) \
(((__uint64_t)__bswap32((x) & 0xffffffff) << 32) | __bswap32((x) >> 32))
#ifdef __GNUCLIKE_BUILTIN_CONSTANT_P
#define __bswap16(x) \
((__uint16_t)(__builtin_constant_p(x) ? \
__bswap16_gen((__uint16_t)(x)) : __bswap16_var(x)))
#define __bswap32(x) \
(__builtin_constant_p(x) ? \
__bswap32_gen((__uint32_t)(x)) : __bswap32_var(x))
#define __bswap64(x) \
(__builtin_constant_p(x) ? \
__bswap64_gen((__uint64_t)(x)) : __bswap64_var(x))
#else
/* XXX these are broken for use in static initializers. */
#define __bswap16(x) __bswap16_var(x)
#define __bswap32(x) __bswap32_var(x)
#define __bswap64(x) __bswap64_var(x)
#endif
/* These are defined as functions to avoid multiple evaluation of x. */
static __inline __uint16_t
__bswap16_var(__uint16_t _x)
{
return (__bswap16_gen(_x));
}
static __inline __uint32_t
__bswap32_var(__uint32_t _x)
{
#ifdef __GNUCLIKE_ASM
__asm("bswap %0" : "+r" (_x));
return (_x);
#else
return (__bswap32_gen(_x));
#endif
}
#define __htonl(x) __bswap32(x)
#define __htons(x) __bswap16(x)
#define __ntohl(x) __bswap32(x)
#define __ntohs(x) __bswap16(x)
#include <sys/isa_defs.h>
#include <sys/int_types.h>
#if defined(__GNUC__) && defined(_ASM_INLINES) && \
(defined(__i386) || defined(__amd64))
#include <asm/byteorder.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
/*
* macros for conversion between host and (internet) network byte order
*/
#if defined(_BIG_ENDIAN) && !defined(ntohl) && !defined(__lint)
/* big-endian */
#if defined(_BIG_ENDIAN) && (defined(__amd64__) || defined(__amd64))
#error "incompatible ENDIAN / ARCH combination"
#endif
#define ntohl(x) (x)
#define ntohs(x) (x)
#define htonl(x) (x)
#define htons(x) (x)
#elif !defined(ntohl) /* little-endian */
#ifndef _IN_PORT_T
#define _IN_PORT_T
typedef uint16_t in_port_t;
#endif
#ifndef _IN_ADDR_T
#define _IN_ADDR_T
typedef uint32_t in_addr_t;
#endif
#if !defined(_XPG4_2) || defined(__EXTENSIONS__) || defined(_XPG5)
extern uint32_t htonl(uint32_t);
extern uint16_t htons(uint16_t);
extern uint32_t ntohl(uint32_t);
extern uint16_t ntohs(uint16_t);
#else
extern in_addr_t htonl(in_addr_t);
extern in_port_t htons(in_port_t);
extern in_addr_t ntohl(in_addr_t);
extern in_port_t ntohs(in_port_t);
#endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) || defined(_XPG5) */
#endif
#if !defined(_XPG4_2) || defined(__EXTENSIONS__)
/*
* Macros to reverse byte order
*/
#define BSWAP_8(x) ((x) & 0xff)
#define BSWAP_16(x) ((BSWAP_8(x) << 8) | BSWAP_8((x) >> 8))
#define BSWAP_32(x) ((BSWAP_16(x) << 16) | BSWAP_16((x) >> 16))
#define BSWAP_64(x) ((BSWAP_32(x) << 32) | BSWAP_32((x) >> 32))
#define BMASK_8(x) ((x) & 0xff)
#define BMASK_16(x) ((x) & 0xffff)
#define BMASK_32(x) ((x) & 0xffffffff)
#define BMASK_64(x) (x)
/*
* Macros to convert from a specific byte order to/from native byte order
*/
#ifdef _BIG_ENDIAN
#define BE_8(x) BMASK_8(x)
#define BE_16(x) BMASK_16(x)
#define BE_32(x) BMASK_32(x)
#define BE_64(x) BMASK_64(x)
#define LE_8(x) BSWAP_8(x)
#define LE_16(x) BSWAP_16(x)
#define LE_32(x) BSWAP_32(x)
#define LE_64(x) BSWAP_64(x)
#else
#define LE_8(x) BMASK_8(x)
#define LE_16(x) BMASK_16(x)
#define LE_32(x) BMASK_32(x)
#define LE_64(x) BMASK_64(x)
#define BE_8(x) BSWAP_8(x)
#define BE_16(x) BSWAP_16(x)
#define BE_32(x) BSWAP_32(x)
#define BE_64(x) BSWAP_64(x)
#endif
#ifdef _BIG_ENDIAN
static __inline__ uint64_t
htonll(uint64_t n)
{
return (n);
}
static __inline__ uint64_t
ntohll(uint64_t n)
{
return (n);
}
#else
static __inline__ uint64_t
htonll(uint64_t n)
{
return ((((uint64_t)htonl(n)) << 32) + htonl(n >> 32));
}
static __inline__ uint64_t
ntohll(uint64_t n)
{
return ((((uint64_t)ntohl(n)) << 32) + ntohl(n >> 32));
}
#endif
/*
* Macros to read unaligned values from a specific byte order to
* native byte order
*/
#define BE_IN8(xa) \
*((uint8_t *)(xa))
#define BE_IN16(xa) \
(((uint16_t)BE_IN8(xa) << 8) | BE_IN8((uint8_t *)(xa)+1))
#define BE_IN32(xa) \
(((uint32_t)BE_IN16(xa) << 16) | BE_IN16((uint8_t *)(xa)+2))
#define BE_IN64(xa) \
(((uint64_t)BE_IN32(xa) << 32) | BE_IN32((uint8_t *)(xa)+4))
#define LE_IN8(xa) \
*((uint8_t *)(xa))
#define LE_IN16(xa) \
(((uint16_t)LE_IN8((uint8_t *)(xa) + 1) << 8) | LE_IN8(xa))
#define LE_IN32(xa) \
(((uint32_t)LE_IN16((uint8_t *)(xa) + 2) << 16) | LE_IN16(xa))
#define LE_IN64(xa) \
(((uint64_t)LE_IN32((uint8_t *)(xa) + 4) << 32) | LE_IN32(xa))
/*
* Macros to write unaligned values from native byte order to a specific byte
* order.
*/
#define BE_OUT8(xa, yv) *((uint8_t *)(xa)) = (uint8_t)(yv);
#define BE_OUT16(xa, yv) \
BE_OUT8((uint8_t *)(xa) + 1, yv); \
BE_OUT8((uint8_t *)(xa), (yv) >> 8);
#define BE_OUT32(xa, yv) \
BE_OUT16((uint8_t *)(xa) + 2, yv); \
BE_OUT16((uint8_t *)(xa), (yv) >> 16);
#define BE_OUT64(xa, yv) \
BE_OUT32((uint8_t *)(xa) + 4, yv); \
BE_OUT32((uint8_t *)(xa), (yv) >> 32);
#define LE_OUT8(xa, yv) *((uint8_t *)(xa)) = (uint8_t)(yv);
#define LE_OUT16(xa, yv) \
LE_OUT8((uint8_t *)(xa), yv); \
LE_OUT8((uint8_t *)(xa) + 1, (yv) >> 8);
#define LE_OUT32(xa, yv) \
LE_OUT16((uint8_t *)(xa), yv); \
LE_OUT16((uint8_t *)(xa) + 2, (yv) >> 16);
#define LE_OUT64(xa, yv) \
LE_OUT32((uint8_t *)(xa), yv); \
LE_OUT32((uint8_t *)(xa) + 4, (yv) >> 32);
#endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_BYTEORDER_H */
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