endian.h revision 66458
1/* $FreeBSD: head/sys/ia64/include/endian.h 66458 2000-09-29 13:46:07Z dfr $ */ 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 62typedef u_int32_t in_addr_t; 63typedef u_int16_t in_port_t; 64 65__BEGIN_DECLS 66in_addr_t htonl __P((in_addr_t)); 67in_port_t htons __P((in_port_t)); 68in_addr_t ntohl __P((in_addr_t)); 69in_port_t ntohs __P((in_port_t)); 70u_int16_t bswap16 __P((u_int16_t)); 71u_int32_t bswap32 __P((u_int32_t)); 72u_int64_t bswap64 __P((u_int64_t)); 73__END_DECLS 74 75/* 76 * Macros for network/external number representation conversion. 77 */ 78#if BYTE_ORDER == BIG_ENDIAN && !defined(lint) 79#define ntohl(x) (x) 80#define ntohs(x) (x) 81#define htonl(x) (x) 82#define htons(x) (x) 83 84#define NTOHL(x) (x) 85#define NTOHS(x) (x) 86#define HTONL(x) (x) 87#define HTONS(x) (x) 88 89#else 90 91#define NTOHL(x) (x) = ntohl((in_addr_t)x) 92#define NTOHS(x) (x) = ntohs((in_port_t)x) 93#define HTONL(x) (x) = htonl((in_addr_t)x) 94#define HTONS(x) (x) = htons((in_port_t)x) 95#endif 96#endif /* !_POSIX_SOURCE */ 97#endif /* !_ENDIAN_H_ */ 98