1 /* $NetBSD: endian.h,v 1.1 1999/09/13 10:31:17 itojun 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 7.7 (Berkeley) 4/3/91 36 */ 37 38 #ifndef _MACHINE_ENDIAN_H_ 39 #define _MACHINE_ENDIAN_H_ 40 41 42 /* 43 * Definitions for byte order, according to byte significance from low 44 * address to high. 45 */ 46 #define LITTLE_ENDIAN 1234 /* LSB first: i386, vax */ 47 #define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */ 48 #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */ 49 50 #ifndef _BYTE_ORDER 51 #error Define _BYTE_ORDER! 52 #endif 53 #define BYTE_ORDER _BYTE_ORDER 54 55 #if BYTE_ORDER == BIG_ENDIAN 56 #define _QUAD_HIGHWORD 0 57 #define _QUAD_LOWWORD 1 58 #else 59 #define _QUAD_HIGHWORD 1 60 #define _QUAD_LOWWORD 0 61 #endif 62 63 #include <sys/cdefs.h> 64 65 typedef u_int32_t in_addr_t; 66 typedef u_int16_t in_port_t; 67 68 __BEGIN_DECLS 69 in_addr_t htonl __P((in_addr_t)) __attribute__((__const__)); 70 in_port_t htons __P((in_port_t)) __attribute__((__const__)); 71 in_addr_t ntohl __P((in_addr_t)) __attribute__((__const__)); 72 in_port_t ntohs __P((in_port_t)) __attribute__((__const__)); 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) (void) (x) 85 #define NTOHS(x) (void) (x) 86 #define HTONL(x) (void) (x) 87 #define HTONS(x) (void) (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 97 #endif /* _MACHINE_ENDIAN_H_ */ 98