| | 1 | /* |
| | 2 | * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * This file contains Original Code and/or Modifications of Original Code |
| | 7 | * as defined in and that are subject to the Apple Public Source License |
| | 8 | * Version 2.0 (the 'License'). You may not use this file except in |
| | 9 | * compliance with the License. The rights granted to you under the License |
| | 10 | * may not be used to create, or enable the creation or redistribution of, |
| | 11 | * unlawful or unlicensed copies of an Apple operating system, or to |
| | 12 | * circumvent, violate, or enable the circumvention or violation of, any |
| | 13 | * terms of an Apple operating system software license agreement. |
| | 14 | * |
| | 15 | * Please obtain a copy of the License at |
| | 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
| | 17 | * |
| | 18 | * The Original Code and all software distributed under the License are |
| | 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 23 | * Please see the License for the specific language governing rights and |
| | 24 | * limitations under the License. |
| | 25 | * |
| | 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
| | 27 | */ |
| | 28 | /* |
| | 29 | * @OSF_COPYRIGHT@ |
| | 30 | * |
| | 31 | */ |
| | 32 | |
| | 33 | #ifndef _MACHINE_ENDIAN_H_ |
| | 34 | #define _MACHINE_ENDIAN_H_ |
| | 35 | |
| | 36 | /* |
| | 37 | * Definitions for byte order, |
| | 38 | * according to byte significance from low address to high. |
| | 39 | */ |
| | 40 | #define LITTLE_ENDIAN 1234 /* least-significant byte first (vax) */ |
| | 41 | #define BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */ |
| | 42 | #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp) */ |
| | 43 | |
| | 44 | #define BYTE_ORDER LITTLE_ENDIAN /* byte order on i386 */ |
| | 45 | #define ENDIAN LITTLE |
| | 46 | |
| | 47 | /* |
| | 48 | * Macros for network/external number representation conversion. |
| | 49 | * Use GNUC support to inline the byteswappers. |
| | 50 | */ |
| | 51 | |
| | 52 | #if !defined(ntohs) |
| | 53 | static __inline__ unsigned short ntohs(unsigned short); |
| | 54 | static __inline__ |
| | 55 | unsigned short |
| | 56 | ntohs(unsigned short w_int) |
| | 57 | { |
| | 58 | return ((w_int << 8) | (w_int >> 8)); |
| | 59 | } |
| | 60 | #endif |
| | 61 | |
| | 62 | #if !defined(htons) |
| | 63 | unsigned short htons(unsigned short); |
| | 64 | #define htons ntohs |
| | 65 | #endif |
| | 66 | |
| | 67 | #if !defined(ntohl) |
| | 68 | static __inline__ unsigned long ntohl(unsigned long); |
| | 69 | static __inline__ |
| | 70 | unsigned long |
| | 71 | ntohl(unsigned long value) |
| | 72 | { |
| | 73 | #if defined(__clang__) |
| | 74 | return (unsigned long)__builtin_bswap32((unsigned int)value); |
| | 75 | #else |
| | 76 | unsigned long l = value; |
| | 77 | __asm__ volatile("bswap %0" : "=r" (l) : "0" (l)); |
| | 78 | return l; |
| | 79 | #endif |
| | 80 | } |
| | 81 | #endif |
| | 82 | |
| | 83 | #if !defined(htonl) |
| | 84 | unsigned long htonl(unsigned long); |
| | 85 | #define htonl ntohl |
| | 86 | #endif |
| | 87 | |
| | 88 | #define NTOHL(x) (x) = ntohl((unsigned long)x) |
| | 89 | #define NTOHS(x) (x) = ntohs((unsigned short)x) |
| | 90 | #define HTONL(x) (x) = htonl((unsigned long)x) |
| | 91 | #define HTONS(x) (x) = htons((unsigned short)x) |
| | 92 | |
| | 93 | #endif |
projects / apple / xnu.git / blame_incremental