endian.h revision 74746 
1/* $FreeBSD: head/sys/ia64/include/endian.h 74746 2001-03-24 15:17:27Z ume $ */
2/* From: NetBSD: endian.h,v 1.5 1997/10/09 15:42:19 bouyer Exp */
3
4/*
5 * Copyright (c) 1987, 1991, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 *	@(#)endian.h	8.1 (Berkeley) 6/10/93
37 */
38
39#ifndef _ENDIAN_H_
40#define	_ENDIAN_H_
41
42/*
43 * Define the order of 32-bit words in 64-bit words.
44 */
45#define _QUAD_HIGHWORD 1
46#define _QUAD_LOWWORD 0
47
48#ifndef _POSIX_SOURCE
49/*
50 * Definitions for byte order, according to byte significance from low
51 * address to high.
52 */
53#define	LITTLE_ENDIAN	1234	/* LSB first: i386, vax */
54#define	BIG_ENDIAN	4321	/* MSB first: 68000, ibm, net */
55#define	PDP_ENDIAN	3412	/* LSB first in word, MSW first in long */
56
57#define	BYTE_ORDER	LITTLE_ENDIAN
58
59#include <sys/cdefs.h>
60#include <sys/types.h>
61
62__BEGIN_DECLS
63in_addr_t	htonl __P((in_addr_t));
64in_port_t	htons __P((in_port_t));
65in_addr_t	ntohl __P((in_addr_t));
66in_port_t	ntohs __P((in_port_t));
67u_int16_t	bswap16 __P((u_int16_t));
68u_int32_t	bswap32 __P((u_int32_t));
69u_int64_t	bswap64 __P((u_int64_t));
70__END_DECLS
71
72/*
73 * Macros for network/external number representation conversion.
74 */
75#if BYTE_ORDER == BIG_ENDIAN && !defined(lint)
76#define	ntohl(x)	(x)
77#define	ntohs(x)	(x)
78#define	htonl(x)	(x)
79#define	htons(x)	(x)
80
81#define	NTOHL(x)	(x)
82#define	NTOHS(x)	(x)
83#define	HTONL(x)	(x)
84#define	HTONS(x)	(x)
85
86#else
87
88#define	NTOHL(x)	(x) = ntohl((in_addr_t)x)
89#define	NTOHS(x)	(x) = ntohs((in_port_t)x)
90#define	HTONL(x)	(x) = htonl((in_addr_t)x)
91#define	HTONS(x)	(x) = htons((in_port_t)x)
92#endif
93#endif /* !_POSIX_SOURCE */
94#endif /* !_ENDIAN_H_ */
95