1 /* 2 * Copyright (c) 1987, 1991 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)endian.h 7.7 (Berkeley) 4/3/91 34 */ 35 36 /* 37 * Definitions for byte order, according to byte significance from low 38 * address to high. 39 */ 40 #define LITTLE_ENDIAN 1234 /* LSB first: i386, vax */ 41 #define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */ 42 #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */ 43 44 #define BYTE_ORDER BIG_ENDIAN 45 46 #ifndef KERNEL 47 #include <sys/cdefs.h> 48 #endif 49 50 __BEGIN_DECLS 51 unsigned long htonl __P((unsigned long)); 52 unsigned short htons __P((unsigned short)); 53 unsigned long ntohl __P((unsigned long)); 54 unsigned short ntohs __P((unsigned short)); 55 __END_DECLS 56 57 /* 58 * Macros for network/external number representation conversion. 59 */ 60 #if BYTE_ORDER == BIG_ENDIAN && !defined(lint) 61 #define ntohl(x) (x) 62 #define ntohs(x) (x) 63 #define htonl(x) (x) 64 #define htons(x) (x) 65 66 #define NTOHL(x) (x) 67 #define NTOHS(x) (x) 68 #define HTONL(x) (x) 69 #define HTONS(x) (x) 70 71 #else 72 73 #define NTOHL(x) (x) = ntohl((u_long)x) 74 #define NTOHS(x) (x) = ntohs((u_short)x) 75 #define HTONL(x) (x) = htonl((u_long)x) 76 #define HTONS(x) (x) = htons((u_short)x) 77 #endif 78