/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ * */ #ifndef _MACHINE_ENDIAN_H_ #define _MACHINE_ENDIAN_H_ /* * Definitions for byte order, * according to byte significance from low address to high. */ #define LITTLE_ENDIAN 1234 /* least-significant byte first (vax) */ #define BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */ #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp) */ #define BYTE_ORDER LITTLE_ENDIAN /* byte order on i386 */ #define ENDIAN LITTLE /* * Macros for network/external number representation conversion. */ unsigned short ntohs(unsigned short), htons(unsigned short); unsigned long ntohl(unsigned long), htonl(unsigned long); /* * Use GNUC support to inline the byteswappers. */ extern __inline__ unsigned short ntohs(unsigned short w_int) { register unsigned short w = w_int; __asm__ volatile("xchgb %h1,%b1" : "=q" (w) : "0" (w)); return (w); /* zero-extend for compat */ } #define htons ntohs extern __inline__ unsigned long ntohl(register unsigned long value) { register unsigned long l = value; __asm__ volatile("bswap %0" : "=r" (l) : "0" (l)); return l; } #define htonl ntohl #define NTOHL(x) (x) = ntohl((unsigned long)x) #define NTOHS(x) (x) = ntohs((unsigned short)x) #define HTONL(x) (x) = htonl((unsigned long)x) #define HTONS(x) (x) = htons((unsigned short)x) #endif