1/* 2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_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. Please obtain a copy of the License at 10 * http://www.opensource.apple.com/apsl/ and read it before using this 11 * file. 12 * 13 * The Original Code and all software distributed under the License are 14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 18 * Please see the License for the specific language governing rights and 19 * limitations under the License. 20 * 21 * @APPLE_LICENSE_HEADER_END@ 22 */ 23#ifndef __HFS_ENDIAN_H__ 24#define __HFS_ENDIAN_H__ 25 26/* 27 * hfs_endian.h 28 * 29 * This file prototypes endian swapping routines for the HFS/HFS Plus 30 * volume format. 31 */ 32#include <libkern/OSByteOrder.h> 33 34/*********************/ 35/* BIG ENDIAN Macros */ 36/*********************/ 37#if BYTE_ORDER == BIG_ENDIAN 38 /* HFS is always big endian, make swaps into no-ops */ 39 #define SWAP_BE16(__a) (__a) 40 #define SWAP_BE32(__a) (__a) 41 #define SWAP_BE64(__a) (__a) 42 43/************************/ 44/* LITTLE ENDIAN Macros */ 45/************************/ 46#elif BYTE_ORDER == LITTLE_ENDIAN 47 /* HFS is always big endian, make swaps actually swap */ 48 #define SWAP_BE16(__a) OSSwapBigToHostInt16 (__a) 49 #define SWAP_BE32(__a) OSSwapBigToHostInt32 (__a) 50 #define SWAP_BE64(__a) OSSwapBigToHostInt64 (__a) 51 52#else 53#warning Unknown byte order 54#error 55#endif 56 57#endif /* __HFS_ENDIAN__ */ 58