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