projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b A |
1 | /* |
| 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 6 | * The contents of this file constitute Original Code as defined in and | |
| 7 | * are subject to the Apple Public Source License Version 1.1 (the | |
| 8 | * "License"). You may not use this file except in compliance with the | |
| 9 | * License. Please obtain a copy of the License at | |
| 10 | * http://www.apple.com/publicsource and read it before using this file. | |
| 11 | * | |
| 12 | * This Original Code and all software distributed under the License are | |
| 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the | |
| 17 | * License for the specific language governing rights and limitations | |
| 18 | * under the License. | |
| 19 | * | |
| 20 | * @APPLE_LICENSE_HEADER_END@ | |
| 21 | */ | |
| 22 | /* | |
| 23 | * @OSF_COPYRIGHT@ | |
| 24 | * | |
| 25 | */ | |
| 26 | ||
| 27 | #ifndef _MACHINE_ENDIAN_H_ | |
| 28 | #define _MACHINE_ENDIAN_H_ | |
| 29 | ||
| 30 | /* | |
| 31 | * Definitions for byte order, | |
| 32 | * according to byte significance from low address to high. | |
| 33 | */ | |
| 34 | #define LITTLE_ENDIAN 1234 /* least-significant byte first (vax) */ | |
| 35 | #define BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */ | |
| 36 | #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp) */ | |
| 37 | ||
| 38 | #define BYTE_ORDER LITTLE_ENDIAN /* byte order on i386 */ | |
| 39 | #define ENDIAN LITTLE | |
| 40 | ||
| 41 | /* | |
| 42 | * Macros for network/external number representation conversion. | |
| 43 | */ | |
| 44 | ||
| 45 | unsigned short ntohs(unsigned short), htons(unsigned short); | |
| 46 | unsigned long ntohl(unsigned long), htonl(unsigned long); | |
| 47 | ||
| 48 | /* | |
| 49 | * Use GNUC support to inline the byteswappers. | |
| 50 | */ | |
| 51 | ||
| 52 | extern __inline__ | |
| 53 | unsigned short | |
| 54 | ntohs(unsigned short w_int) | |
| 55 | { | |
| 56 | register unsigned short w = w_int; | |
| 57 | __asm__ volatile("xchgb %h1,%b1" : "=q" (w) : "0" (w)); | |
| 58 | return (w); /* zero-extend for compat */ | |
| 59 | } | |
| 60 | ||
| 61 | #define htons ntohs | |
| 62 | ||
| 63 | extern __inline__ | |
| 64 | unsigned long | |
| 65 | ntohl(register unsigned long value) | |
| 66 | { | |
| 67 | register unsigned long l = value; | |
| 68 | __asm__ volatile("bswap %0" : "=r" (l) : "0" (l)); | |
| 69 | return l; | |
| 70 | } | |
| 71 | ||
| 72 | #define htonl ntohl | |
| 73 | ||
| 74 | #define NTOHL(x) (x) = ntohl((unsigned long)x) | |
| 75 | #define NTOHS(x) (x) = ntohs((unsigned short)x) | |
| 76 | #define HTONL(x) (x) = htonl((unsigned long)x) | |
| 77 | #define HTONS(x) (x) = htons((unsigned short)x) | |
| 78 | ||
| 79 | #endif |