1 /* $NetBSD: endian.h,v 1.4 1995/03/28 18:21:21 jtc 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 #if defined(_KERNEL)||defined(STANDALONE) 55 static unsigned long htonl __P((unsigned long)); 56 static unsigned short htons __P((unsigned short)); 57 static unsigned long ntohl __P((unsigned long)); 58 static unsigned short ntohs __P((unsigned short)); 59 #else 60 unsigned long htonl __P((unsigned long)); 61 unsigned short htons __P((unsigned short)); 62 unsigned long ntohl __P((unsigned long)); 63 unsigned short ntohs __P((unsigned short)); 64 #endif 65 __END_DECLS 66 67 /* 68 * Macros for network/external number representation conversion. 69 */ 70 #if BYTE_ORDER == BIG_ENDIAN && !defined(lint) 71 #define ntohl(x) (x) 72 #define ntohs(x) (x) 73 #define htonl(x) (x) 74 #define htons(x) (x) 75 76 #define NTOHL(x) (x) 77 #define NTOHS(x) (x) 78 #define HTONL(x) (x) 79 #define HTONS(x) (x) 80 81 #else 82 83 #define NTOHL(x) (x) = ntohl((u_long)x) 84 #define NTOHS(x) (x) = ntohs((u_short)x) 85 #define HTONL(x) (x) = htonl((u_long)x) 86 #define HTONS(x) (x) = htons((u_short)x) 87 #endif 88