1 /* $NetBSD: endian.h,v 1.2 1994/10/26 08:02:04 cgd Exp $ */ 2 3 /* 4 * Copyright (c) 1987, 1991 Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)endian.h 7.8 (Berkeley) 4/3/91 36 */ 37 38 /* 39 * Definitions for byte order, according to byte significance from low 40 * address to high. 41 */ 42 #define LITTLE_ENDIAN 1234 /* LSB first: i386, vax */ 43 #define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */ 44 #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */ 45 46 #define _QUAD_HIGHWORD 1 47 #define _QUAD_LOWWORD 0 48 49 #define BYTE_ORDER LITTLE_ENDIAN 50 51 #include <sys/cdefs.h> 52 53 __BEGIN_DECLS 54 unsigned long htonl __P((unsigned long)); 55 unsigned short htons __P((unsigned short)); 56 unsigned long ntohl __P((unsigned long)); 57 unsigned short ntohs __P((unsigned short)); 58 __END_DECLS 59 60 /* 61 * Macros for network/external number representation conversion. 62 */ 63 #if BYTE_ORDER == BIG_ENDIAN && !defined(lint) 64 #define ntohl(x) (x) 65 #define ntohs(x) (x) 66 #define htonl(x) (x) 67 #define htons(x) (x) 68 69 #define NTOHL(x) (x) 70 #define NTOHS(x) (x) 71 #define HTONL(x) (x) 72 #define HTONS(x) (x) 73 74 #else 75 76 #define NTOHL(x) (x) = ntohl((u_long)x) 77 #define NTOHS(x) (x) = ntohs((u_short)x) 78 #define HTONL(x) (x) = htonl((u_long)x) 79 #define HTONS(x) (x) = htons((u_short)x) 80 #endif 81