1 /* $NetBSD: endian.h,v 1.4 1994/10/26 21:09:38 cgd Exp $ */ 2 3 /* 4 * Copyright (c) 1987, 1991, 1993 5 * The Regents of the University of California. 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 8.1 (Berkeley) 6/11/93 36 */ 37 38 #ifndef _ENDIAN_H_ 39 #define _ENDIAN_H_ 40 41 /* 42 * Define _NOQUAD if the compiler does NOT support 64-bit integers. 43 */ 44 /* #define _NOQUAD */ 45 46 /* 47 * Define the order of 32-bit words in 64-bit words. 48 */ 49 #define _QUAD_HIGHWORD 1 50 #define _QUAD_LOWWORD 0 51 52 #ifndef _POSIX_SOURCE 53 /* 54 * Definitions for byte order, according to byte significance from low 55 * address to high. 56 */ 57 #define LITTLE_ENDIAN 1234 /* LSB first: i386, vax */ 58 #define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */ 59 #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */ 60 61 #define BYTE_ORDER LITTLE_ENDIAN 62 63 #include <sys/cdefs.h> 64 65 __BEGIN_DECLS 66 unsigned long htonl __P((unsigned long)); 67 unsigned short htons __P((unsigned short)); 68 unsigned long ntohl __P((unsigned long)); 69 unsigned short ntohs __P((unsigned short)); 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((u_long)x) 89 #define NTOHS(x) (x) = ntohs((u_short)x) 90 #define HTONL(x) (x) = htonl((u_long)x) 91 #define HTONS(x) (x) = htons((u_short)x) 92 #endif 93 #endif /* ! _POSIX_SOURCE */ 94 #endif /* !_ENDIAN_H_ */ 95