| | 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 | #ifndef __HFS_ENDIAN_H__ |
| | 23 | #define __HFS_ENDIAN_H__ |
| | 24 | |
| | 25 | #include <sys/appleapiopts.h> |
| | 26 | |
| | 27 | #ifdef KERNEL |
| | 28 | #ifdef __APPLE_API_PRIVATE |
| | 29 | /* |
| | 30 | * hfs_endian.h |
| | 31 | * |
| | 32 | * This file prototypes endian swapping routines for the HFS/HFS Plus |
| | 33 | * volume format. |
| | 34 | */ |
| | 35 | #include "hfs.h" |
| | 36 | #include "hfscommon/headers/BTreesInternal.h" |
| | 37 | #include <architecture/byte_order.h> |
| | 38 | |
| | 39 | /*********************/ |
| | 40 | /* BIG ENDIAN Macros */ |
| | 41 | /*********************/ |
| | 42 | #if BYTE_ORDER == BIG_ENDIAN |
| | 43 | |
| | 44 | /* HFS is always big endian, make swaps into no-ops */ |
| | 45 | #define SWAP_BE16(__a) (__a) |
| | 46 | #define SWAP_BE32(__a) (__a) |
| | 47 | #define SWAP_BE64(__a) (__a) |
| | 48 | |
| | 49 | /* HFS is always big endian, no swapping needed */ |
| | 50 | #define SWAP_HFS_PLUS_FORK_DATA(__a) |
| | 51 | #define SWAP_BT_NODE(__a, __b, __c) |
| | 52 | |
| | 53 | /************************/ |
| | 54 | /* LITTLE ENDIAN Macros */ |
| | 55 | /************************/ |
| | 56 | #elif BYTE_ORDER == LITTLE_ENDIAN |
| | 57 | |
| | 58 | /* HFS is always big endian, make swaps actually swap */ |
| | 59 | #define SWAP_BE16(__a) NXSwapBigShortToHost (__a) |
| | 60 | #define SWAP_BE32(__a) NXSwapBigLongToHost (__a) |
| | 61 | #define SWAP_BE64(__a) NXSwapBigLongLongToHost (__a) |
| | 62 | |
| | 63 | #define SWAP_HFS_PLUS_FORK_DATA(__a) hfs_swap_HFSPlusForkData ((__a)) |
| | 64 | #define SWAP_BT_NODE(__a, __b, __c, __d) hfs_swap_BTNode ((__a), (__b), (__c), (__d)) |
| | 65 | |
| | 66 | #else |
| | 67 | #warning Unknown byte order |
| | 68 | #error |
| | 69 | #endif |
| | 70 | |
| | 71 | #ifdef __cplusplus |
| | 72 | extern "C" { |
| | 73 | #endif |
| | 74 | |
| | 75 | void hfs_swap_HFSPlusForkData (HFSPlusForkData *src); |
| | 76 | int hfs_swap_BTNode (BlockDescriptor *src, int isHFSPlus, HFSCatalogNodeID fileID, int unswap); |
| | 77 | |
| | 78 | #ifdef __cplusplus |
| | 79 | } |
| | 80 | #endif |
| | 81 | |
| | 82 | #endif /* __APPLE_API_PRIVATE */ |
| | 83 | #endif /* KERNEL */ |
| | 84 | #endif /* __HFS_FORMAT__ */ |
projects / apple / xnu.git / blame_incremental