Root/
Source at commit 2054 created 11 years 10 months ago. By zef, Fixed source indent. | |
---|---|
1 | /*␊ |
2 | * Copyright (c) 2000-2003 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 2.0 (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 | * hfs.c - File System Module for HFS and HFS+.␊ |
24 | *␊ |
25 | * Copyright (c) 1999-2002 Apple Computer, Inc.␊ |
26 | *␊ |
27 | * DRI: Josh de Cesare␊ |
28 | */␊ |
29 | ␊ |
30 | #include <sl.h>␊ |
31 | #include <hfs/hfs_format.h>␊ |
32 | ␊ |
33 | #include "hfs.h"␊ |
34 | ␊ |
35 | #define kBlockSize (0x200)␊ |
36 | ␊ |
37 | #define kMDBBaseOffset (2 * kBlockSize)␊ |
38 | ␊ |
39 | #define kBTreeCatalog (0)␊ |
40 | #define kBTreeExtents (1)␊ |
41 | ␊ |
42 | #ifdef __i386__␊ |
43 | ␊ |
44 | static CICell gCurrentIH;␊ |
45 | static long long gAllocationOffset;␊ |
46 | static long gIsHFSPlus;␊ |
47 | static long gCaseSensitive;␊ |
48 | static long gBlockSize;␊ |
49 | static long gCacheBlockSize;␊ |
50 | static char *gBTreeHeaderBuffer;␊ |
51 | static BTHeaderRec *gBTHeaders[2];␊ |
52 | static char *gHFSMdbVib;␊ |
53 | static HFSMasterDirectoryBlock *gHFSMDB;␊ |
54 | static char *gHFSPlusHeader;␊ |
55 | static HFSPlusVolumeHeader *gHFSPlus;␊ |
56 | static char *gLinkTemp;␊ |
57 | static long long gVolID;␊ |
58 | static char *gTempStr;␊ |
59 | ␊ |
60 | #else /* !__i386__ */␊ |
61 | ␊ |
62 | static CICell gCurrentIH;␊ |
63 | static long long gAllocationOffset;␊ |
64 | static long gIsHFSPlus;␊ |
65 | static long gBlockSize;␊ |
66 | static long gCaseSensitive;␊ |
67 | static long gCacheBlockSize;␊ |
68 | static char gBTreeHeaderBuffer[512];␊ |
69 | static BTHeaderRec *gBTHeaders[2];␊ |
70 | static char gHFSMdbVib[kBlockSize];␊ |
71 | static HFSMasterDirectoryBlock *gHFSMDB =(HFSMasterDirectoryBlock*)gHFSMdbVib;␊ |
72 | static char gHFSPlusHeader[kBlockSize];␊ |
73 | static HFSPlusVolumeHeader *gHFSPlus =(HFSPlusVolumeHeader*)gHFSPlusHeader;␊ |
74 | static char gLinkTemp[64];␊ |
75 | static long long gVolID;␊ |
76 | ␊ |
77 | #endif /* !__i386__ */␊ |
78 | ␊ |
79 | static long ReadFile(void *file, uint64_t *length, void *base, uint64_t offset);␊ |
80 | static long GetCatalogEntryInfo(void *entry, long *flags, long *time,␊ |
81 | FinderInfo *finderInfo, long *infoValid);␊ |
82 | static long ResolvePathToCatalogEntry(char *filePath, long *flags,␊ |
83 | void *entry, long dirID, long long *dirIndex);␊ |
84 | ␊ |
85 | static long GetCatalogEntry(long long *dirIndex, char **name,␊ |
86 | long *flags, long *time,␊ |
87 | FinderInfo *finderInfo, long *infoValid);␊ |
88 | static long ReadCatalogEntry(char *fileName, long dirID, void *entry,␊ |
89 | long long *dirIndex);␊ |
90 | static long ReadExtentsEntry(long fileID, long startBlock, void *entry);␊ |
91 | ␊ |
92 | static long ReadBTreeEntry(long btree, void *key, char *entry, long long *dirIndex);␊ |
93 | static void GetBTreeRecord(long index, char *nodeBuffer, long nodeSize,␊ |
94 | char **key, char **data);␊ |
95 | ␊ |
96 | static long ReadExtent(char *extent, uint64_t extentSize, long extentFile,␊ |
97 | uint64_t offset, uint64_t size, void *buffer, long cache);␊ |
98 | ␊ |
99 | static long GetExtentStart(void *extents, long index);␊ |
100 | static long GetExtentSize(void *extents, long index);␊ |
101 | ␊ |
102 | static long CompareHFSCatalogKeys(void *key, void *testKey);␊ |
103 | static long CompareHFSPlusCatalogKeys(void *key, void *testKey);␊ |
104 | static long CompareHFSExtentsKeys(void *key, void *testKey);␊ |
105 | static long CompareHFSPlusExtentsKeys(void *key, void *testKey);␊ |
106 | ␊ |
107 | extern long FastRelString(u_int8_t *str1, u_int8_t *str2);␊ |
108 | extern long BinaryUnicodeCompare(u_int16_t *uniStr1, u_int32_t len1,␊ |
109 | u_int16_t *uniStr2, u_int32_t len2);␊ |
110 | ␊ |
111 | ␊ |
112 | static void SwapFinderInfo(FndrFileInfo *dst, FndrFileInfo *src)␊ |
113 | {␊ |
114 | dst->fdType = SWAP_BE32(src->fdType);␊ |
115 | dst->fdCreator = SWAP_BE32(src->fdCreator);␊ |
116 | dst->fdFlags = SWAP_BE16(src->fdFlags);␊ |
117 | // Don't bother with location␊ |
118 | }␊ |
119 | ␊ |
120 | void HFSFree(CICell ih)␊ |
121 | {␊ |
122 | if(gCurrentIH == ih)␊ |
123 | gCurrentIH = 0;␊ |
124 | free(ih);␊ |
125 | }␊ |
126 | ␊ |
127 | bool HFSProbe (const void *buf)␊ |
128 | {␊ |
129 | ␉const HFSMasterDirectoryBlock *mdb;␊ |
130 | ␉const HFSPlusVolumeHeader *header;␊ |
131 | ␉mdb=(const HFSMasterDirectoryBlock *)(((const char*)buf)+kMDBBaseOffset);␊ |
132 | ␉header=(const HFSPlusVolumeHeader *)(((const char*)buf)+kMDBBaseOffset);␊ |
133 | ␉␊ |
134 | ␉if ( SWAP_BE16(mdb->drSigWord) == kHFSSigWord )␊ |
135 | ␉␉return true;␊ |
136 | ␉if (SWAP_BE16(header->signature) != kHFSPlusSigWord &&␊ |
137 | SWAP_BE16(header->signature) != kHFSXSigWord)␊ |
138 | ␉␉return false;␊ |
139 | ␉return true;␊ |
140 | }␊ |
141 | ␊ |
142 | long HFSInitPartition(CICell ih)␊ |
143 | {␊ |
144 | long extentSize, extentFile, nodeSize;␊ |
145 | void *extent;␊ |
146 | ␊ |
147 | if (ih == gCurrentIH) {␊ |
148 | #ifdef __i386__␊ |
149 | CacheInit(ih, gCacheBlockSize);␊ |
150 | #endif␊ |
151 | return 0;␊ |
152 | }␊ |
153 | ␊ |
154 | #ifdef __i386__␊ |
155 | if (!gTempStr) gTempStr = (char *)malloc(4096);␊ |
156 | if (!gLinkTemp) gLinkTemp = (char *)malloc(64);␊ |
157 | if (!gBTreeHeaderBuffer) gBTreeHeaderBuffer = (char *)malloc(512);␊ |
158 | if (!gHFSMdbVib) {␊ |
159 | gHFSMdbVib = (char *)malloc(kBlockSize);␊ |
160 | gHFSMDB = (HFSMasterDirectoryBlock *)gHFSMdbVib;␊ |
161 | }␊ |
162 | if (!gHFSPlusHeader) {␊ |
163 | gHFSPlusHeader = (char *)malloc(kBlockSize);␊ |
164 | gHFSPlus = (HFSPlusVolumeHeader *)gHFSPlusHeader;␊ |
165 | }␊ |
166 | if (!gTempStr || !gLinkTemp || !gBTreeHeaderBuffer ||␊ |
167 | !gHFSMdbVib || !gHFSPlusHeader) return -1;␊ |
168 | #endif /* __i386__ */␊ |
169 | ␊ |
170 | gAllocationOffset = 0;␊ |
171 | gIsHFSPlus = 0;␊ |
172 | gCaseSensitive = 0;␊ |
173 | gBTHeaders[0] = 0;␊ |
174 | gBTHeaders[1] = 0;␊ |
175 | ␊ |
176 | // Look for the HFS MDB␊ |
177 | Seek(ih, kMDBBaseOffset);␊ |
178 | Read(ih, (long)gHFSMdbVib, kBlockSize);␊ |
179 | ␊ |
180 | if ( SWAP_BE16(gHFSMDB->drSigWord) == kHFSSigWord ) {␊ |
181 | gAllocationOffset = SWAP_BE16(gHFSMDB->drAlBlSt) * kBlockSize;␊ |
182 | ␊ |
183 | // See if it is HFSPlus␊ |
184 | if (SWAP_BE16(gHFSMDB->drEmbedSigWord) != kHFSPlusSigWord) {␊ |
185 | // Normal HFS;␊ |
186 | gCacheBlockSize = gBlockSize = SWAP_BE32(gHFSMDB->drAlBlkSiz);␊ |
187 | CacheInit(ih, gCacheBlockSize);␊ |
188 | gCurrentIH = ih;␊ |
189 | ␊ |
190 | // grab the 64 bit volume ID␊ |
191 | bcopy(&gHFSMDB->drFndrInfo[6], &gVolID, 8);␊ |
192 | ␊ |
193 | // Get the Catalog BTree node size.␊ |
194 | extent = (HFSExtentDescriptor *)&gHFSMDB->drCTExtRec;␊ |
195 | extentSize = SWAP_BE32(gHFSMDB->drCTFlSize);␊ |
196 | extentFile = kHFSCatalogFileID;␊ |
197 | ReadExtent(extent, extentSize, extentFile, 0, 256,␊ |
198 | gBTreeHeaderBuffer + kBTreeCatalog * 256, 0);␊ |
199 | ␊ |
200 | nodeSize = SWAP_BE16(((BTHeaderRec *)(gBTreeHeaderBuffer + kBTreeCatalog * 256 + ␊ |
201 | sizeof(BTNodeDescriptor)))->nodeSize);␊ |
202 | ␊ |
203 | // If the BTree node size is larger than the block size, reset the cache.␊ |
204 | if (nodeSize > gBlockSize) {␊ |
205 | gCacheBlockSize = nodeSize;␊ |
206 | CacheInit(ih, gCacheBlockSize);␊ |
207 | }␊ |
208 | ␊ |
209 | return 0;␊ |
210 | }␊ |
211 | ␊ |
212 | // Calculate the offset to the embeded HFSPlus volume.␊ |
213 | gAllocationOffset += (long long)SWAP_BE16(gHFSMDB->drEmbedExtent.startBlock) *␊ |
214 | SWAP_BE32(gHFSMDB->drAlBlkSiz);␊ |
215 | }␊ |
216 | ␊ |
217 | // Look for the HFSPlus Header␊ |
218 | Seek(ih, gAllocationOffset + kMDBBaseOffset);␊ |
219 | Read(ih, (long)gHFSPlusHeader, kBlockSize);␊ |
220 | ␊ |
221 | // Not a HFS+ or HFSX volume.␊ |
222 | if (SWAP_BE16(gHFSPlus->signature) != kHFSPlusSigWord &&␊ |
223 | SWAP_BE16(gHFSPlus->signature) != kHFSXSigWord) {␊ |
224 | ␉verbose("HFS signature was not present.\n");␊ |
225 | gCurrentIH = 0;␊ |
226 | ␉return -1;␊ |
227 | }␊ |
228 | ␊ |
229 | gIsHFSPlus = 1;␊ |
230 | gCacheBlockSize = gBlockSize = SWAP_BE32(gHFSPlus->blockSize);␊ |
231 | CacheInit(ih, gCacheBlockSize);␊ |
232 | gCurrentIH = ih;␊ |
233 | ␊ |
234 | ␉ih->modTime = SWAP_BE32(gHFSPlus->modifyDate) - 2082844800;␊ |
235 | ␉␊ |
236 | // grab the 64 bit volume ID␊ |
237 | bcopy(&gHFSPlus->finderInfo[24], &gVolID, 8);␊ |
238 | ␊ |
239 | // Get the Catalog BTree node size.␊ |
240 | extent = &gHFSPlus->catalogFile.extents;␊ |
241 | extentSize = SWAP_BE64(gHFSPlus->catalogFile.logicalSize);␊ |
242 | extentFile = kHFSCatalogFileID;␊ |
243 | ␊ |
244 | ReadExtent(extent, extentSize, extentFile, 0, 256,␊ |
245 | gBTreeHeaderBuffer + kBTreeCatalog * 256, 0);␊ |
246 | ␊ |
247 | nodeSize = SWAP_BE16(((BTHeaderRec *)(gBTreeHeaderBuffer + kBTreeCatalog * 256 +␊ |
248 | sizeof(BTNodeDescriptor)))->nodeSize);␊ |
249 | ␊ |
250 | // If the BTree node size is larger than the block size, reset the cache.␊ |
251 | if (nodeSize > gBlockSize) {␊ |
252 | gCacheBlockSize = nodeSize;␊ |
253 | CacheInit(ih, gCacheBlockSize);␊ |
254 | }␊ |
255 | ␊ |
256 | return 0;␊ |
257 | }␊ |
258 | ␊ |
259 | long HFSLoadFile(CICell ih, char * filePath)␊ |
260 | {␊ |
261 | return HFSReadFile(ih, filePath, (void *)gFSLoadAddress, 0, 0);␊ |
262 | }␊ |
263 | ␊ |
264 | long HFSReadFile(CICell ih, char * filePath, void *base, uint64_t offset, uint64_t length)␊ |
265 | {␊ |
266 | char entry[512];␊ |
267 | char devStr[12];␊ |
268 | long dirID, result, flags;␊ |
269 | ␊ |
270 | if (HFSInitPartition(ih) == -1) return -1;␊ |
271 | ␊ |
272 | dirID = kHFSRootFolderID;␊ |
273 | // Skip a lead '\'. Start in the system folder if there are two.␊ |
274 | if (filePath[0] == '/') {␊ |
275 | if (filePath[1] == '/') {␊ |
276 | if (gIsHFSPlus) dirID = SWAP_BE32(((long *)gHFSPlus->finderInfo)[5]);␊ |
277 | else dirID = SWAP_BE32(gHFSMDB->drFndrInfo[5]);␊ |
278 | if (dirID == 0) {␊ |
279 | ␉␉return -1;␊ |
280 | ␉ }␊ |
281 | filePath++;␊ |
282 | }␊ |
283 | filePath++;␊ |
284 | }␊ |
285 | ␊ |
286 | result = ResolvePathToCatalogEntry(filePath, &flags, entry, dirID, 0);␊ |
287 | if ((result == -1) || ((flags & kFileTypeMask) != kFileTypeFlat)) {␊ |
288 | ␉return -1;␊ |
289 | }␊ |
290 | ␊ |
291 | #if UNUSED␊ |
292 | // Not yet for Intel. System.config/Default.table will fail this check.␊ |
293 | // Check file owner and permissions.␊ |
294 | if (flags & (kOwnerNotRoot | kPermGroupWrite | kPermOtherWrite)) return -1;␊ |
295 | #endif␊ |
296 | ␊ |
297 | result = ReadFile(entry, &length, base, offset);␊ |
298 | if (result == -1) {␊ |
299 | ␉return -1;␊ |
300 | }␊ |
301 | ␊ |
302 | getDeviceDescription(ih, devStr);␊ |
303 | verbose("Read HFS%s file: [%s/%s] %d bytes.\n",␊ |
304 | (gIsHFSPlus ? "+" : ""), devStr, filePath, (uint32_t)length);␊ |
305 | ␉␊ |
306 | return length;␊ |
307 | }␊ |
308 | ␊ |
309 | long HFSGetDirEntry(CICell ih, char * dirPath, long long * dirIndex, char ** name,␊ |
310 | long * flags, long * time,␊ |
311 | FinderInfo * finderInfo, long * infoValid)␊ |
312 | {␊ |
313 | char entry[512];␊ |
314 | long dirID, dirFlags;␊ |
315 | ␊ |
316 | if (HFSInitPartition(ih) == -1) return -1;␊ |
317 | ␊ |
318 | if (*dirIndex == -1) return -1;␊ |
319 | ␊ |
320 | dirID = kHFSRootFolderID;␊ |
321 | // Skip a lead '\'. Start in the system folder if there are two.␊ |
322 | if (dirPath[0] == '/') {␊ |
323 | if (dirPath[1] == '/') {␊ |
324 | if (gIsHFSPlus) dirID = SWAP_BE32(((long *)gHFSPlus->finderInfo)[5]);␊ |
325 | else dirID = SWAP_BE32(gHFSMDB->drFndrInfo[5]);␊ |
326 | if (dirID == 0) return -1;␊ |
327 | dirPath++;␊ |
328 | }␊ |
329 | dirPath++;␊ |
330 | }␊ |
331 | ␊ |
332 | if (*dirIndex == 0) {␊ |
333 | ResolvePathToCatalogEntry(dirPath, &dirFlags, entry, dirID, dirIndex);␊ |
334 | if (*dirIndex == 0) *dirIndex = -1;␊ |
335 | if ((dirFlags & kFileTypeMask) != kFileTypeUnknown) return -1;␊ |
336 | }␊ |
337 | ␊ |
338 | GetCatalogEntry(dirIndex, name, flags, time, finderInfo, infoValid);␊ |
339 | if (*dirIndex == 0) *dirIndex = -1;␊ |
340 | if ((*flags & kFileTypeMask) == kFileTypeUnknown) return -1;␊ |
341 | ␊ |
342 | return 0;␊ |
343 | }␊ |
344 | ␊ |
345 | void␊ |
346 | HFSGetDescription(CICell ih, char *str, long strMaxLen)␊ |
347 | {␊ |
348 | ␊ |
349 | UInt16 nodeSize;␊ |
350 | UInt32 firstLeafNode;␊ |
351 | long long dirIndex;␊ |
352 | char *name;␊ |
353 | long flags, time;␊ |
354 | ␊ |
355 | if (HFSInitPartition(ih) == -1) { return; }␊ |
356 | ␊ |
357 | /* Fill some crucial data structures by side effect. */␊ |
358 | dirIndex = 0;␊ |
359 | HFSGetDirEntry(ih, "/", &dirIndex, &name, &flags, &time, 0, 0);␊ |
360 | ␊ |
361 | /* Now we can loook up the volume name node. */␊ |
362 | nodeSize = SWAP_BE16(gBTHeaders[kBTreeCatalog]->nodeSize);␊ |
363 | firstLeafNode = SWAP_BE32(gBTHeaders[kBTreeCatalog]->firstLeafNode);␊ |
364 | ␊ |
365 | dirIndex = (long long) firstLeafNode * nodeSize;␊ |
366 | ␊ |
367 | GetCatalogEntry(&dirIndex, &name, &flags, &time, 0, 0);␊ |
368 | ␊ |
369 | strncpy(str, name, strMaxLen);␊ |
370 | str[strMaxLen] = '\0';␊ |
371 | }␊ |
372 | ␊ |
373 | ␊ |
374 | long␊ |
375 | HFSGetFileBlock(CICell ih, char *filePath, unsigned long long *firstBlock)␊ |
376 | {␊ |
377 | char entry[512];␊ |
378 | long dirID, result, flags;␊ |
379 | void *extents;␊ |
380 | HFSCatalogFile *hfsFile = (void *)entry;␊ |
381 | HFSPlusCatalogFile *hfsPlusFile = (void *)entry;␊ |
382 | ␊ |
383 | if (HFSInitPartition(ih) == -1) return -1;␊ |
384 | ␊ |
385 | dirID = kHFSRootFolderID;␊ |
386 | // Skip a lead '\'. Start in the system folder if there are two.␊ |
387 | if (filePath[0] == '/') {␊ |
388 | if (filePath[1] == '/') {␊ |
389 | if (gIsHFSPlus) dirID = SWAP_BE32(((long *)gHFSPlus->finderInfo)[5]);␊ |
390 | else dirID = SWAP_BE32(gHFSMDB->drFndrInfo[5]);␊ |
391 | if (dirID == 0) {␊ |
392 | ␉␉return -1;␊ |
393 | ␉ }␊ |
394 | filePath++;␊ |
395 | }␊ |
396 | filePath++;␊ |
397 | }␊ |
398 | ␊ |
399 | result = ResolvePathToCatalogEntry(filePath, &flags, entry, dirID, 0);␊ |
400 | if ((result == -1) || ((flags & kFileTypeMask) != kFileTypeFlat)) {␊ |
401 | printf("HFS: Resolve path %s failed\n", filePath);␊ |
402 | ␉return -1;␊ |
403 | }␊ |
404 | ␊ |
405 | if (gIsHFSPlus) {␊ |
406 | extents = &hfsPlusFile->dataFork.extents;␊ |
407 | } else {␊ |
408 | extents = &hfsFile->dataExtents;␊ |
409 | }␊ |
410 | ␊ |
411 | #if DEBUG␊ |
412 | printf("extent start 0x%x\n", (unsigned long)GetExtentStart(extents, 0));␊ |
413 | printf("block size 0x%x\n", (unsigned long)gBlockSize);␊ |
414 | printf("Allocation offset 0x%x\n", (unsigned long)gAllocationOffset);␊ |
415 | #endif␊ |
416 | *firstBlock = ((unsigned long long)GetExtentStart(extents, 0) * (unsigned long long) gBlockSize + gAllocationOffset) / 512ULL;␊ |
417 | return 0;␊ |
418 | }␊ |
419 | ␊ |
420 | long HFSGetUUID(CICell ih, char *uuidStr)␊ |
421 | {␊ |
422 | if (HFSInitPartition(ih) == -1) return -1;␊ |
423 | if (gVolID == 0LL) return -1;␊ |
424 | ␊ |
425 | return CreateUUIDString((uint8_t*)(&gVolID), sizeof(gVolID), uuidStr);␊ |
426 | }␊ |
427 | ␊ |
428 | // Private Functions␊ |
429 | ␊ |
430 | static long ReadFile(void * file, uint64_t * length, void * base, uint64_t offset)␊ |
431 | {␊ |
432 | void *extents;␊ |
433 | long fileID;␊ |
434 | uint64_t fileLength;␊ |
435 | HFSCatalogFile *hfsFile = file;␊ |
436 | HFSPlusCatalogFile *hfsPlusFile = file;␊ |
437 | ␊ |
438 | if (gIsHFSPlus) {␊ |
439 | fileID = SWAP_BE32(hfsPlusFile->fileID);␊ |
440 | fileLength = (uint64_t)SWAP_BE64(hfsPlusFile->dataFork.logicalSize);␊ |
441 | extents = &hfsPlusFile->dataFork.extents;␊ |
442 | } else {␊ |
443 | fileID = SWAP_BE32(hfsFile->fileID);␊ |
444 | fileLength = SWAP_BE32(hfsFile->dataLogicalSize);␊ |
445 | extents = &hfsFile->dataExtents;␊ |
446 | }␊ |
447 | ␊ |
448 | if (offset > fileLength) {␊ |
449 | printf("Offset is too large.\n");␊ |
450 | return -1;␊ |
451 | }␊ |
452 | ␊ |
453 | if ((*length == 0) || ((offset + *length) > fileLength)) {␊ |
454 | *length = fileLength - offset;␊ |
455 | }␊ |
456 | ␊ |
457 | /* if (*length > kLoadSize) {␊ |
458 | printf("File is too large.\n");␊ |
459 | return -1;␊ |
460 | }*/␊ |
461 | ␊ |
462 | *length = ReadExtent((char *)extents, fileLength, fileID,␊ |
463 | offset, *length, (char *)base, 0);␊ |
464 | ␊ |
465 | return 0;␊ |
466 | }␊ |
467 | ␊ |
468 | static long GetCatalogEntryInfo(void * entry, long * flags, long * time,␊ |
469 | FinderInfo * finderInfo, long * infoValid)␊ |
470 | {␊ |
471 | long tmpTime = 0;␊ |
472 | long valid = 0;␊ |
473 | ␊ |
474 | // Get information about the file.␊ |
475 | ␊ |
476 | switch ( SWAP_BE16(*(short *)entry) )␊ |
477 | {␊ |
478 | case kHFSFolderRecord :␊ |
479 | *flags = kFileTypeDirectory;␊ |
480 | tmpTime = SWAP_BE32(((HFSCatalogFolder *)entry)->modifyDate);␊ |
481 | break;␊ |
482 | ␊ |
483 | case kHFSPlusFolderRecord :␊ |
484 | *flags = kFileTypeDirectory |␊ |
485 | (SWAP_BE16(((HFSPlusCatalogFolder *)entry)->bsdInfo.fileMode) & kPermMask);␊ |
486 | if (SWAP_BE32(((HFSPlusCatalogFolder *)entry)->bsdInfo.ownerID) != 0)␊ |
487 | *flags |= kOwnerNotRoot;␊ |
488 | tmpTime = SWAP_BE32(((HFSPlusCatalogFolder *)entry)->contentModDate);␊ |
489 | break;␊ |
490 | ␊ |
491 | case kHFSFileRecord :␊ |
492 | *flags = kFileTypeFlat;␊ |
493 | tmpTime = SWAP_BE32(((HFSCatalogFile *)entry)->modifyDate);␊ |
494 | if (finderInfo) {␊ |
495 | SwapFinderInfo((FndrFileInfo *)finderInfo, &((HFSCatalogFile *)entry)->userInfo);␊ |
496 | valid = 1;␊ |
497 | }␊ |
498 | break;␊ |
499 | ␊ |
500 | case kHFSPlusFileRecord :␊ |
501 | *flags = kFileTypeFlat |␊ |
502 | (SWAP_BE16(((HFSPlusCatalogFile *)entry)->bsdInfo.fileMode) & kPermMask);␊ |
503 | if (SWAP_BE32(((HFSPlusCatalogFile *)entry)->bsdInfo.ownerID) != 0)␊ |
504 | *flags |= kOwnerNotRoot;␊ |
505 | tmpTime = SWAP_BE32(((HFSPlusCatalogFile *)entry)->contentModDate);␊ |
506 | if (finderInfo) {␊ |
507 | SwapFinderInfo((FndrFileInfo *)finderInfo, &((HFSPlusCatalogFile *)entry)->userInfo);␊ |
508 | valid = 1;␊ |
509 | }␊ |
510 | break;␊ |
511 | ␊ |
512 | case kHFSFileThreadRecord :␊ |
513 | case kHFSPlusFileThreadRecord :␊ |
514 | case kHFSFolderThreadRecord :␊ |
515 | case kHFSPlusFolderThreadRecord :␊ |
516 | *flags = kFileTypeUnknown;␊ |
517 | tmpTime = 0;␊ |
518 | break;␊ |
519 | }␊ |
520 | ␊ |
521 | if (time != 0) {␊ |
522 | // Convert base time from 1904 to 1970.␊ |
523 | *time = tmpTime - 2082844800;␊ |
524 | }␊ |
525 | if (infoValid) *infoValid = valid;␊ |
526 | ␊ |
527 | return 0;␊ |
528 | }␊ |
529 | ␊ |
530 | static long ResolvePathToCatalogEntry(char * filePath, long * flags,␊ |
531 | void * entry, long dirID, long long * dirIndex)␊ |
532 | {␊ |
533 | char *restPath;␊ |
534 | long result, cnt, subFolderID = 0;␊ |
535 | long long tmpDirIndex;␊ |
536 | HFSPlusCatalogFile *hfsPlusFile;␊ |
537 | ␊ |
538 | // Copy the file name to gTempStr␊ |
539 | cnt = 0;␊ |
540 | while ((filePath[cnt] != '/') && (filePath[cnt] != '\0')) cnt++;␊ |
541 | strlcpy(gTempStr, filePath, cnt+1);␊ |
542 | ␊ |
543 | // Move restPath to the right place.␊ |
544 | if (filePath[cnt] != '\0') cnt++;␊ |
545 | restPath = filePath + cnt;␊ |
546 | ␊ |
547 | // gTempStr is a name in the current Dir.␊ |
548 | // restPath is the rest of the path if any.␊ |
549 | ␊ |
550 | result = ReadCatalogEntry(gTempStr, dirID, entry, dirIndex);␊ |
551 | if (result == -1) {␊ |
552 | ␉return -1;␊ |
553 | }␊ |
554 | ␊ |
555 | GetCatalogEntryInfo(entry, flags, 0, 0, 0);␊ |
556 | ␊ |
557 | if ((*flags & kFileTypeMask) == kFileTypeDirectory) {␊ |
558 | if (gIsHFSPlus)␊ |
559 | subFolderID = SWAP_BE32(((HFSPlusCatalogFolder *)entry)->folderID);␊ |
560 | else␊ |
561 | subFolderID = SWAP_BE32(((HFSCatalogFolder *)entry)->folderID);␊ |
562 | }␊ |
563 | ␊ |
564 | if ((*flags & kFileTypeMask) == kFileTypeDirectory)␊ |
565 | result = ResolvePathToCatalogEntry(restPath, flags, entry,␊ |
566 | subFolderID, dirIndex);␊ |
567 | ␊ |
568 | if (gIsHFSPlus && ((*flags & kFileTypeMask) == kFileTypeFlat)) {␊ |
569 | hfsPlusFile = (HFSPlusCatalogFile *)entry;␊ |
570 | if ((SWAP_BE32(hfsPlusFile->userInfo.fdType) == kHardLinkFileType) &&␊ |
571 | (SWAP_BE32(hfsPlusFile->userInfo.fdCreator) == kHFSPlusCreator)) {␊ |
572 | sprintf(gLinkTemp, "%s/%s%ld", HFSPLUSMETADATAFOLDER,␊ |
573 | HFS_INODE_PREFIX, SWAP_BE32(hfsPlusFile->bsdInfo.special.iNodeNum));␊ |
574 | result = ResolvePathToCatalogEntry(gLinkTemp, flags, entry,␊ |
575 | kHFSRootFolderID, &tmpDirIndex);␊ |
576 | }␊ |
577 | }␊ |
578 | ␊ |
579 | return result;␊ |
580 | }␊ |
581 | ␊ |
582 | static long GetCatalogEntry(long long * dirIndex, char ** name,␊ |
583 | long * flags, long * time,␊ |
584 | FinderInfo * finderInfo, long * infoValid)␊ |
585 | {␊ |
586 | long extentSize, nodeSize, curNode, index;␊ |
587 | void *extent;␊ |
588 | char *nodeBuf, *testKey, *entry;␊ |
589 | BTNodeDescriptor *node;␊ |
590 | ␊ |
591 | if (gIsHFSPlus) {␊ |
592 | extent = &gHFSPlus->catalogFile.extents;␊ |
593 | extentSize = SWAP_BE64(gHFSPlus->catalogFile.logicalSize);␊ |
594 | } else {␊ |
595 | extent = (HFSExtentDescriptor *)&gHFSMDB->drCTExtRec;␊ |
596 | extentSize = SWAP_BE32(gHFSMDB->drCTFlSize);␊ |
597 | }␊ |
598 | ␊ |
599 | nodeSize = SWAP_BE16(gBTHeaders[kBTreeCatalog]->nodeSize);␊ |
600 | nodeBuf = (char *)malloc(nodeSize);␊ |
601 | node = (BTNodeDescriptor *)nodeBuf;␊ |
602 | ␊ |
603 | index = (long) (*dirIndex % nodeSize);␊ |
604 | curNode = (long) (*dirIndex / nodeSize);␊ |
605 | ␊ |
606 | // Read the BTree node and get the record for index.␊ |
607 | ReadExtent(extent, extentSize, kHFSCatalogFileID,␊ |
608 | (long long) curNode * nodeSize, nodeSize, nodeBuf, 1);␊ |
609 | GetBTreeRecord(index, nodeBuf, nodeSize, &testKey, &entry);␊ |
610 | ␊ |
611 | GetCatalogEntryInfo(entry, flags, time, finderInfo, infoValid);␊ |
612 | ␊ |
613 | // Get the file name.␊ |
614 | if (gIsHFSPlus) {␊ |
615 | utf_encodestr(((HFSPlusCatalogKey *)testKey)->nodeName.unicode,␊ |
616 | SWAP_BE16(((HFSPlusCatalogKey *)testKey)->nodeName.length),␊ |
617 | (u_int8_t *)gTempStr, 256, OSBigEndian);␊ |
618 | } else {␊ |
619 | strncpy(gTempStr,␊ |
620 | (const char *)&((HFSCatalogKey *)testKey)->nodeName[1],␊ |
621 | ((HFSCatalogKey *)testKey)->nodeName[0]);␊ |
622 | gTempStr[((HFSCatalogKey *)testKey)->nodeName[0]] = '\0';␊ |
623 | }␊ |
624 | *name = gTempStr;␊ |
625 | ␊ |
626 | // Update dirIndex.␊ |
627 | index++;␊ |
628 | if (index == SWAP_BE16(node->numRecords)) {␊ |
629 | index = 0;␊ |
630 | curNode = SWAP_BE32(node->fLink);␊ |
631 | }␊ |
632 | *dirIndex = (long long) curNode * nodeSize + index;␊ |
633 | ␊ |
634 | free(nodeBuf);␊ |
635 | ␊ |
636 | return 0;␊ |
637 | }␊ |
638 | ␊ |
639 | static long ReadCatalogEntry(char * fileName, long dirID,␊ |
640 | void * entry, long long * dirIndex)␊ |
641 | {␊ |
642 | long length;␊ |
643 | char key[sizeof(HFSPlusCatalogKey)];␊ |
644 | HFSCatalogKey *hfsKey = (HFSCatalogKey *)key;␊ |
645 | HFSPlusCatalogKey *hfsPlusKey = (HFSPlusCatalogKey *)key;␊ |
646 | ␊ |
647 | // Make the catalog key.␊ |
648 | if ( gIsHFSPlus )␊ |
649 | {␊ |
650 | hfsPlusKey->parentID = SWAP_BE32(dirID);␊ |
651 | length = strlen(fileName);␊ |
652 | if (length > 255) length = 255;␊ |
653 | utf_decodestr((u_int8_t *)fileName, hfsPlusKey->nodeName.unicode,␊ |
654 | &(hfsPlusKey->nodeName.length), 512, OSBigEndian);␊ |
655 | } else {␊ |
656 | hfsKey->parentID = SWAP_BE32(dirID);␊ |
657 | length = strlen(fileName);␊ |
658 | if (length > 31) length = 31;␊ |
659 | hfsKey->nodeName[0] = length;␊ |
660 | strncpy((char *)(hfsKey->nodeName + 1), fileName, length);␊ |
661 | }␊ |
662 | ␊ |
663 | return ReadBTreeEntry(kBTreeCatalog, &key, entry, dirIndex);␊ |
664 | }␊ |
665 | ␊ |
666 | static long ReadExtentsEntry(long fileID, long startBlock, void * entry)␊ |
667 | {␊ |
668 | char key[sizeof(HFSPlusExtentKey)];␊ |
669 | HFSExtentKey *hfsKey = (HFSExtentKey *)key;␊ |
670 | HFSPlusExtentKey *hfsPlusKey = (HFSPlusExtentKey *)key;␊ |
671 | ␊ |
672 | // Make the extents key.␊ |
673 | if (gIsHFSPlus) {␊ |
674 | hfsPlusKey->forkType = 0;␊ |
675 | hfsPlusKey->fileID = SWAP_BE32(fileID);␊ |
676 | hfsPlusKey->startBlock = SWAP_BE32(startBlock);␊ |
677 | } else {␊ |
678 | hfsKey->forkType = 0;␊ |
679 | hfsKey->fileID = SWAP_BE32(fileID);␊ |
680 | hfsKey->startBlock = SWAP_BE16(startBlock);␊ |
681 | }␊ |
682 | ␊ |
683 | return ReadBTreeEntry(kBTreeExtents, &key, entry, 0);␊ |
684 | }␊ |
685 | ␊ |
686 | static long ReadBTreeEntry(long btree, void * key, char * entry, long long * dirIndex)␊ |
687 | {␊ |
688 | long extentSize;␊ |
689 | void *extent;␊ |
690 | short extentFile;␊ |
691 | char *nodeBuf;␊ |
692 | BTNodeDescriptor *node;␊ |
693 | long nodeSize, result = 0, entrySize = 0;␊ |
694 | long curNode, index = 0, lowerBound, upperBound;␊ |
695 | char *testKey, *recordData;␊ |
696 | ␊ |
697 | // Figure out which tree is being looked at.␊ |
698 | if (btree == kBTreeCatalog) {␊ |
699 | if (gIsHFSPlus) {␊ |
700 | extent = &gHFSPlus->catalogFile.extents;␊ |
701 | extentSize = SWAP_BE64(gHFSPlus->catalogFile.logicalSize);␊ |
702 | } else {␊ |
703 | extent = (HFSExtentDescriptor *)&gHFSMDB->drCTExtRec;␊ |
704 | extentSize = SWAP_BE32(gHFSMDB->drCTFlSize);␊ |
705 | }␊ |
706 | extentFile = kHFSCatalogFileID;␊ |
707 | } else {␊ |
708 | if (gIsHFSPlus) {␊ |
709 | extent = &gHFSPlus->extentsFile.extents;␊ |
710 | extentSize = SWAP_BE64(gHFSPlus->extentsFile.logicalSize);␊ |
711 | } else {␊ |
712 | extent = (HFSExtentDescriptor *)&gHFSMDB->drXTExtRec;␊ |
713 | extentSize = SWAP_BE32(gHFSMDB->drXTFlSize);␊ |
714 | }␊ |
715 | extentFile = kHFSExtentsFileID;␊ |
716 | }␊ |
717 | ␊ |
718 | // Read the BTree Header if needed.␊ |
719 | if (gBTHeaders[btree] == 0) {␊ |
720 | ReadExtent(extent, extentSize, extentFile, 0, 256,␊ |
721 | gBTreeHeaderBuffer + btree * 256, 0);␊ |
722 | gBTHeaders[btree] = (BTHeaderRec *)(gBTreeHeaderBuffer + btree * 256 +␊ |
723 | sizeof(BTNodeDescriptor));␊ |
724 | if ((gIsHFSPlus && btree == kBTreeCatalog) &&␊ |
725 | (gBTHeaders[btree]->keyCompareType == kHFSBinaryCompare)) {␊ |
726 | gCaseSensitive = 1;␊ |
727 | }␊ |
728 | }␊ |
729 | ␊ |
730 | curNode = SWAP_BE32(gBTHeaders[btree]->rootNode);␊ |
731 | nodeSize = SWAP_BE16(gBTHeaders[btree]->nodeSize);␊ |
732 | nodeBuf = (char *)malloc(nodeSize);␊ |
733 | node = (BTNodeDescriptor *)nodeBuf;␊ |
734 | ␊ |
735 | while (1) {␊ |
736 | // Read the current node.␊ |
737 | ReadExtent(extent, extentSize, extentFile,␊ |
738 | (long long) curNode * nodeSize, nodeSize, nodeBuf, 1);␊ |
739 | ␊ |
740 | // Find the matching key.␊ |
741 | lowerBound = 0;␊ |
742 | upperBound = SWAP_BE16(node->numRecords) - 1;␊ |
743 | while (lowerBound <= upperBound) {␊ |
744 | index = (lowerBound + upperBound) / 2;␊ |
745 | ␊ |
746 | GetBTreeRecord(index, nodeBuf, nodeSize, &testKey, &recordData);␊ |
747 | ␊ |
748 | if (gIsHFSPlus) {␊ |
749 | if (btree == kBTreeCatalog) {␊ |
750 | result = CompareHFSPlusCatalogKeys(key, testKey);␊ |
751 | } else {␊ |
752 | result = CompareHFSPlusExtentsKeys(key, testKey);␊ |
753 | }␊ |
754 | } else {␊ |
755 | if (btree == kBTreeCatalog) {␊ |
756 | result = CompareHFSCatalogKeys(key, testKey);␊ |
757 | } else {␊ |
758 | result = CompareHFSExtentsKeys(key, testKey);␊ |
759 | }␊ |
760 | }␊ |
761 | ␊ |
762 | if (result < 0) upperBound = index - 1; // search < trial␊ |
763 | else if (result > 0) lowerBound = index + 1; // search > trial␊ |
764 | else break; // search = trial␊ |
765 | }␊ |
766 | ␊ |
767 | if (result < 0) {␊ |
768 | index = upperBound;␊ |
769 | GetBTreeRecord(index, nodeBuf, nodeSize, &testKey, &recordData);␊ |
770 | }␊ |
771 | ␊ |
772 | // Found the closest key... Recurse on it if this is an index node.␊ |
773 | if (node->kind == kBTIndexNode) {␊ |
774 | curNode = SWAP_BE32( *((long *)recordData) );␊ |
775 | } else break;␊ |
776 | }␊ |
777 | ␊ |
778 | // Return error if the file was not found.␊ |
779 | if (result != 0) { free(nodeBuf); return -1; }␊ |
780 | ␊ |
781 | if (btree == kBTreeCatalog) {␊ |
782 | switch (SWAP_BE16(*(short *)recordData)) {␊ |
783 | case kHFSFolderRecord : entrySize = 70; break;␊ |
784 | case kHFSFileRecord : entrySize = 102; break;␊ |
785 | case kHFSFolderThreadRecord : entrySize = 46; break;␊ |
786 | case kHFSFileThreadRecord : entrySize = 46; break;␊ |
787 | case kHFSPlusFolderRecord : entrySize = 88; break;␊ |
788 | case kHFSPlusFileRecord : entrySize = 248; break;␊ |
789 | case kHFSPlusFolderThreadRecord : entrySize = 264; break;␊ |
790 | case kHFSPlusFileThreadRecord : entrySize = 264; break;␊ |
791 | }␊ |
792 | } else {␊ |
793 | if (gIsHFSPlus) entrySize = sizeof(HFSPlusExtentRecord);␊ |
794 | else entrySize = sizeof(HFSExtentRecord);␊ |
795 | }␊ |
796 | ␊ |
797 | bcopy(recordData, entry, entrySize);␊ |
798 | ␊ |
799 | // Update dirIndex.␊ |
800 | if (dirIndex != 0) {␊ |
801 | index++;␊ |
802 | if (index == SWAP_BE16(node->numRecords)) {␊ |
803 | index = 0;␊ |
804 | curNode = SWAP_BE32(node->fLink);␊ |
805 | }␊ |
806 | *dirIndex = (long long) curNode * nodeSize + index;␊ |
807 | }␊ |
808 | ␊ |
809 | free(nodeBuf);␊ |
810 | ␊ |
811 | return 0;␊ |
812 | }␊ |
813 | ␊ |
814 | static void GetBTreeRecord(long index, char * nodeBuffer, long nodeSize,␊ |
815 | char ** key, char ** data)␊ |
816 | {␊ |
817 | long keySize;␊ |
818 | long recordOffset;␊ |
819 | ␊ |
820 | recordOffset = SWAP_BE16(*((short *)(nodeBuffer + (nodeSize - 2 * index - 2))));␊ |
821 | *key = nodeBuffer + recordOffset;␊ |
822 | if (gIsHFSPlus) {␊ |
823 | keySize = SWAP_BE16(*(short *)*key);␊ |
824 | *data = *key + 2 + keySize;␊ |
825 | } else {␊ |
826 | keySize = **key;␊ |
827 | *data = *key + 2 + keySize - (keySize & 1);␊ |
828 | }␊ |
829 | }␊ |
830 | ␊ |
831 | static long ReadExtent(char * extent, uint64_t extentSize,␊ |
832 | long extentFile, uint64_t offset, uint64_t size,␊ |
833 | void * buffer, long cache)␊ |
834 | {␊ |
835 | uint64_t lastOffset;␊ |
836 | ␉long long blockNumber, countedBlocks = 0;␊ |
837 | long long nextExtent = 0, sizeRead = 0, readSize;␊ |
838 | long long nextExtentBlock, currentExtentBlock = 0;␊ |
839 | long long readOffset;␊ |
840 | long long extentDensity, sizeofExtent, currentExtentSize;␊ |
841 | char *currentExtent, *extentBuffer = 0, *bufferPos = buffer;␊ |
842 | ␊ |
843 | if (offset >= extentSize) return 0;␊ |
844 | ␊ |
845 | if (gIsHFSPlus) {␊ |
846 | extentDensity = kHFSPlusExtentDensity;␊ |
847 | sizeofExtent = sizeof(HFSPlusExtentDescriptor);␊ |
848 | } else {␊ |
849 | extentDensity = kHFSExtentDensity;␊ |
850 | sizeofExtent = sizeof(HFSExtentDescriptor);␊ |
851 | }␊ |
852 | ␊ |
853 | lastOffset = offset + size;␊ |
854 | while (offset < lastOffset) {␊ |
855 | blockNumber = offset / gBlockSize;␊ |
856 | ␊ |
857 | // Find the extent for the offset.␊ |
858 | for (; ; nextExtent++) {␊ |
859 | if (nextExtent < extentDensity) {␊ |
860 | if ((countedBlocks+GetExtentSize(extent, nextExtent)-1)<blockNumber) {␊ |
861 | countedBlocks += GetExtentSize(extent, nextExtent);␊ |
862 | continue;␊ |
863 | }␊ |
864 | ␊ |
865 | currentExtent = extent + nextExtent * sizeofExtent;␊ |
866 | break;␊ |
867 | }␊ |
868 | ␊ |
869 | if (extentBuffer == 0) {␊ |
870 | extentBuffer = malloc(sizeofExtent * extentDensity);␊ |
871 | if (extentBuffer == 0) return -1;␊ |
872 | }␊ |
873 | ␊ |
874 | nextExtentBlock = nextExtent / extentDensity;␊ |
875 | if (currentExtentBlock != nextExtentBlock) {␊ |
876 | ReadExtentsEntry(extentFile, countedBlocks, extentBuffer);␊ |
877 | currentExtentBlock = nextExtentBlock;␊ |
878 | }␊ |
879 | ␊ |
880 | currentExtentSize = GetExtentSize(extentBuffer, nextExtent % extentDensity);␊ |
881 | ␊ |
882 | if ((countedBlocks + currentExtentSize - 1) >= blockNumber) {␊ |
883 | currentExtent = extentBuffer + sizeofExtent * (nextExtent % extentDensity);␊ |
884 | break;␊ |
885 | }␊ |
886 | ␊ |
887 | countedBlocks += currentExtentSize;␊ |
888 | }␊ |
889 | ␊ |
890 | readOffset = ((blockNumber - countedBlocks) * gBlockSize) +␊ |
891 | (offset % gBlockSize);␊ |
892 | ␊ |
893 | ␉␉// MacWen: fix overflow in multiplication by forcing 64bit multiplication␊ |
894 | readSize = (long long)GetExtentSize(currentExtent, 0) * gBlockSize - readOffset;␊ |
895 | if (readSize > (size - sizeRead)) readSize = size - sizeRead;␊ |
896 | ␊ |
897 | readOffset += (long long)GetExtentStart(currentExtent, 0) * gBlockSize;␊ |
898 | ␊ |
899 | CacheRead(gCurrentIH, bufferPos, gAllocationOffset + readOffset,␊ |
900 | readSize, cache);␊ |
901 | ␊ |
902 | sizeRead += readSize;␊ |
903 | offset += readSize;␊ |
904 | bufferPos += readSize;␊ |
905 | }␊ |
906 | ␊ |
907 | if (extentBuffer) free(extentBuffer);␊ |
908 | ␊ |
909 | return sizeRead;␊ |
910 | }␊ |
911 | ␊ |
912 | static long GetExtentStart(void * extents, long index)␊ |
913 | {␊ |
914 | long start;␊ |
915 | HFSExtentDescriptor *hfsExtents = extents;␊ |
916 | HFSPlusExtentDescriptor *hfsPlusExtents = extents;␊ |
917 | ␊ |
918 | if (gIsHFSPlus) start = SWAP_BE32(hfsPlusExtents[index].startBlock);␊ |
919 | else start = SWAP_BE16(hfsExtents[index].startBlock);␊ |
920 | ␊ |
921 | return start;␊ |
922 | }␊ |
923 | ␊ |
924 | static long GetExtentSize(void * extents, long index)␊ |
925 | {␊ |
926 | long size;␊ |
927 | HFSExtentDescriptor *hfsExtents = extents;␊ |
928 | HFSPlusExtentDescriptor *hfsPlusExtents = extents;␊ |
929 | ␊ |
930 | if (gIsHFSPlus) size = SWAP_BE32(hfsPlusExtents[index].blockCount);␊ |
931 | else size = SWAP_BE16(hfsExtents[index].blockCount);␊ |
932 | ␊ |
933 | return size;␊ |
934 | }␊ |
935 | ␊ |
936 | static long CompareHFSCatalogKeys(void * key, void * testKey)␊ |
937 | {␊ |
938 | HFSCatalogKey *searchKey, *trialKey;␊ |
939 | long result, searchParentID, trialParentID;␊ |
940 | ␊ |
941 | searchKey = key;␊ |
942 | trialKey = testKey;␊ |
943 | ␊ |
944 | searchParentID = SWAP_BE32(searchKey->parentID);␊ |
945 | trialParentID = SWAP_BE32(trialKey->parentID);␊ |
946 | ␊ |
947 | // parent dirID is unsigned␊ |
948 | if (searchParentID > trialParentID) result = 1;␊ |
949 | else if (searchParentID < trialParentID) result = -1;␊ |
950 | else {␊ |
951 | // parent dirID's are equal, compare names␊ |
952 | result = FastRelString(searchKey->nodeName, trialKey->nodeName);␊ |
953 | }␊ |
954 | ␊ |
955 | return result;␊ |
956 | }␊ |
957 | ␊ |
958 | static long CompareHFSPlusCatalogKeys(void * key, void * testKey)␊ |
959 | {␊ |
960 | HFSPlusCatalogKey *searchKey, *trialKey;␊ |
961 | long result, searchParentID, trialParentID;␊ |
962 | ␊ |
963 | searchKey = key;␊ |
964 | trialKey = testKey;␊ |
965 | ␊ |
966 | searchParentID = SWAP_BE32(searchKey->parentID);␊ |
967 | trialParentID = SWAP_BE32(trialKey->parentID);␊ |
968 | ␊ |
969 | // parent dirID is unsigned␊ |
970 | if (searchParentID > trialParentID) result = 1;␊ |
971 | else if (searchParentID < trialParentID) result = -1;␊ |
972 | else {␊ |
973 | // parent dirID's are equal, compare names␊ |
974 | if ((searchKey->nodeName.length == 0) || (trialKey->nodeName.length == 0))␊ |
975 | result = searchKey->nodeName.length - trialKey->nodeName.length;␊ |
976 | else␊ |
977 | if (gCaseSensitive) {␊ |
978 | result = BinaryUnicodeCompare(&searchKey->nodeName.unicode[0],␊ |
979 | SWAP_BE16(searchKey->nodeName.length),␊ |
980 | &trialKey->nodeName.unicode[0],␊ |
981 | SWAP_BE16(trialKey->nodeName.length));␊ |
982 | } else {␊ |
983 | result = FastUnicodeCompare(&searchKey->nodeName.unicode[0],␊ |
984 | SWAP_BE16(searchKey->nodeName.length),␊ |
985 | &trialKey->nodeName.unicode[0],␊ |
986 | SWAP_BE16(trialKey->nodeName.length), OSBigEndian);␊ |
987 | }␊ |
988 | }␊ |
989 | ␊ |
990 | return result;␊ |
991 | }␊ |
992 | ␊ |
993 | static long CompareHFSExtentsKeys(void * key, void * testKey)␊ |
994 | {␊ |
995 | HFSExtentKey *searchKey, *trialKey;␊ |
996 | long result;␊ |
997 | ␊ |
998 | searchKey = key;␊ |
999 | trialKey = testKey;␊ |
1000 | ␊ |
1001 | // assume searchKey < trialKey␊ |
1002 | result = -1; ␊ |
1003 | ␊ |
1004 | if (searchKey->fileID == trialKey->fileID) {␊ |
1005 | // FileNum's are equal; compare fork types␊ |
1006 | if (searchKey->forkType == trialKey->forkType) {␊ |
1007 | // Fork types are equal; compare allocation block number␊ |
1008 | if (searchKey->startBlock == trialKey->startBlock) {␊ |
1009 | // Everything is equal␊ |
1010 | result = 0;␊ |
1011 | } else {␊ |
1012 | // Allocation block numbers differ; determine sign␊ |
1013 | if (SWAP_BE16(searchKey->startBlock) > SWAP_BE16(trialKey->startBlock))␊ |
1014 | result = 1;␊ |
1015 | }␊ |
1016 | } else {␊ |
1017 | // Fork types differ; determine sign␊ |
1018 | if (searchKey->forkType > trialKey->forkType) result = 1;␊ |
1019 | }␊ |
1020 | } else {␊ |
1021 | // FileNums differ; determine sign␊ |
1022 | if (SWAP_BE32(searchKey->fileID) > SWAP_BE32(trialKey->fileID))␊ |
1023 | result = 1;␊ |
1024 | }␊ |
1025 | ␊ |
1026 | return result;␊ |
1027 | }␊ |
1028 | ␊ |
1029 | static long CompareHFSPlusExtentsKeys(void * key, void * testKey)␊ |
1030 | {␊ |
1031 | HFSPlusExtentKey *searchKey, *trialKey;␊ |
1032 | long result;␊ |
1033 | ␊ |
1034 | searchKey = key;␊ |
1035 | trialKey = testKey;␊ |
1036 | ␊ |
1037 | // assume searchKey < trialKey␊ |
1038 | result = -1; ␊ |
1039 | ␊ |
1040 | if (searchKey->fileID == trialKey->fileID) {␊ |
1041 | // FileNum's are equal; compare fork types␊ |
1042 | if (searchKey->forkType == trialKey->forkType) {␊ |
1043 | // Fork types are equal; compare allocation block number␊ |
1044 | if (searchKey->startBlock == trialKey->startBlock) {␊ |
1045 | // Everything is equal␊ |
1046 | result = 0;␊ |
1047 | } else {␊ |
1048 | // Allocation block numbers differ; determine sign␊ |
1049 | if (SWAP_BE32(searchKey->startBlock) > SWAP_BE32(trialKey->startBlock))␊ |
1050 | result = 1;␊ |
1051 | }␊ |
1052 | } else {␊ |
1053 | // Fork types differ; determine sign␊ |
1054 | if (searchKey->forkType > trialKey->forkType) result = 1;␊ |
1055 | }␊ |
1056 | } else {␊ |
1057 | // FileNums differ; determine sign␊ |
1058 | if (SWAP_BE32(searchKey->fileID) > SWAP_BE32(trialKey->fileID))␊ |
1059 | result = 1;␊ |
1060 | }␊ |
1061 | ␊ |
1062 | return result;␊ |
1063 | }␊ |
1064 | ␊ |
1065 |