|
1 // Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies). |
|
2 // All rights reserved. |
|
3 // This component and the accompanying materials are made available |
|
4 // under the terms of "Eclipse Public License v1.0" |
|
5 // which accompanies this distribution, and is available |
|
6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
7 // |
|
8 // Initial Contributors: |
|
9 // Nokia Corporation - initial contribution. |
|
10 // |
|
11 // Contributors: |
|
12 // |
|
13 // Description: |
|
14 // |
|
15 |
|
16 |
|
17 #include <caf/content.h> |
|
18 #include <caf/data.h> |
|
19 #include <zipfile.h> |
|
20 |
|
21 // ==================================================================== |
|
22 // CZipFile public exported interface |
|
23 // ==================================================================== |
|
24 |
|
25 /** |
|
26 Creates a new CZipFile object using the supplied file server session and |
|
27 a valid file handle. The caller must have sufficient rights to |
|
28 access the content of the zipfile, if encrypted/protected. |
|
29 |
|
30 @param aFs File server session used for opening the zipfile |
|
31 @param aFile File handle to be used for accessing the zipfile |
|
32 @return CZipFile object associated with the zipfile if it succeeded |
|
33 @leave KZipArchiveError If file cannot be accessed(invalid handle, corrupt file header, etc.) |
|
34 @leave KZipFileIOError If file cannot be read |
|
35 @leave KCentralDirectoryTrailerNotFound If zip file header doesn't contain information about files inside the archive |
|
36 @leave KCentralDirectoryTrailerInvalid If the information about files inside the archive is corrupt |
|
37 @leave KMultiDiskArchivesNotSupported If zipfile is a multi disk archive |
|
38 @leave ... Any one of the system-wide error codes for other errors. |
|
39 */ |
|
40 EXPORT_C CZipFile* CZipFile::NewL(RFs& aFs, RFile& aFile) |
|
41 { |
|
42 TFileName file; |
|
43 aFile.Name(file); |
|
44 CZipFile* zipFile = new(ELeave) CZipFile(aFs, file); |
|
45 CleanupStack::PushL(zipFile); |
|
46 zipFile->ConstructL(aFile); |
|
47 CleanupStack::Pop(zipFile); |
|
48 return zipFile; |
|
49 } |
|
50 |
|
51 /** |
|
52 Creates a new CZipFile object using the supplied file server session and |
|
53 file name. The caller must have sufficient capabilities to access the directory. |
|
54 The caller must also have sufficient rights to access the content of the |
|
55 zipfile, if encrypted/protected. |
|
56 |
|
57 @param aFs File server session used for opening the zipfile |
|
58 @param aFileName Name of the zipfile |
|
59 @return CZipFile object associated with the zipfile if it succeeded |
|
60 @leave KZipArchiveError If file cannot be accessed(invalid handle, corrupt file header, etc.) |
|
61 @leave KZipFileIOError If file cannot be read |
|
62 @leave KCentralDirectoryTrailerNotFound If zip file header doesn't contain information about files inside the archive |
|
63 @leave KCentralDirectoryTrailerInvalid If the information about files inside the archive is corrupt |
|
64 @leave KMultiDiskArchivesNotSupported If zipfile is a multi disk archive. |
|
65 @leave ... Any one of the system-wide error codes for other errors. |
|
66 */ |
|
67 EXPORT_C CZipFile* CZipFile::NewL(RFs& aFs, const TDesC& aFileName) |
|
68 { |
|
69 CZipFile* zipFile = new(ELeave) CZipFile(aFs, aFileName); |
|
70 CleanupStack::PushL(zipFile); |
|
71 zipFile->ConstructL(aFileName); |
|
72 CleanupStack::Pop(zipFile); |
|
73 return zipFile; |
|
74 } |
|
75 |
|
76 /** |
|
77 Destructor |
|
78 */ |
|
79 EXPORT_C CZipFile::~CZipFile() |
|
80 { |
|
81 DeleteMemberPointers(); |
|
82 } |
|
83 |
|
84 /** |
|
85 @deprecated in 7.0 |
|
86 */ |
|
87 EXPORT_C CZipFile::CZipFile(RFs& aFs, const TDesC& aFileName) |
|
88 : iFileName(aFileName), iFs(aFs) |
|
89 { |
|
90 } |
|
91 |
|
92 /** |
|
93 @deprecated in 7.0 |
|
94 */ |
|
95 EXPORT_C TInt CZipFile::OpenL(void) |
|
96 { |
|
97 if (!iMemberPointers) |
|
98 { |
|
99 ConstructL(iFileName); |
|
100 } |
|
101 return KErrNone; |
|
102 } |
|
103 |
|
104 /** |
|
105 @deprecated in 7.0 |
|
106 */ |
|
107 EXPORT_C void CZipFile::Close(void) |
|
108 { |
|
109 DeleteMemberPointers(); |
|
110 } |
|
111 |
|
112 /** |
|
113 Second phase of construction. Used by Rfile using NewL overload. |
|
114 |
|
115 @leave ... Any one of the system-wide error codes for other errors. |
|
116 */ |
|
117 EXPORT_C void CZipFile::ConstructL(RFile& aFile) |
|
118 { |
|
119 // Use the full name derived from the session path |
|
120 ContentAccess::CContent* content = |
|
121 ContentAccess::CContent::NewL(aFile); |
|
122 CleanupStack::PushL(content); |
|
123 iData = content->OpenContentL(ContentAccess::EPeek); |
|
124 |
|
125 // Parent content object no longer needed because we only need data |
|
126 CleanupStack::PopAndDestroy(content); |
|
127 |
|
128 // Seek to the end |
|
129 TInt length = 0; |
|
130 User::LeaveIfError(iData->Seek(ESeekEnd, length)); |
|
131 iFileLength = length; |
|
132 |
|
133 TInt status; |
|
134 TUint32 offset; |
|
135 |
|
136 if ((status = FindCentralDirectoryTrailer(offset)) != KErrNone) |
|
137 { |
|
138 DeleteMemberPointers(); |
|
139 User::Leave(status); |
|
140 } |
|
141 |
|
142 if ((status = ReadCentralDirectoryTrailer(offset, iTrailer)) != KErrNone) |
|
143 { |
|
144 DeleteMemberPointers(); |
|
145 User::Leave(status); |
|
146 } |
|
147 |
|
148 if (iTrailer.iStartDiskNumber != iTrailer.iDiskNumber) |
|
149 { |
|
150 DeleteMemberPointers(); |
|
151 User::Leave(KMultiDiskArchivesNotSupported); |
|
152 } |
|
153 |
|
154 if ((iTrailer.iOffset + iTrailer.iSize) > iFileLength) |
|
155 { |
|
156 DeleteMemberPointers(); |
|
157 User::Leave(KCentralDirectoryTrailerInvalid); |
|
158 } |
|
159 |
|
160 if (LoadMemberPointersL() != KErrNone) |
|
161 { |
|
162 User::Leave(KZipFileIOError); |
|
163 } |
|
164 } |
|
165 |
|
166 /** |
|
167 Second phase of construction. Used by filename using NewL overload |
|
168 |
|
169 @leave ... Any one of the system-wide error codes for other errors. |
|
170 */ |
|
171 EXPORT_C void CZipFile::ConstructL(const TDesC& aFileName) |
|
172 { |
|
173 TInt status; |
|
174 TUint32 offset; |
|
175 |
|
176 TRAP(status, OpenFileL(aFileName)); |
|
177 if (status) |
|
178 { |
|
179 User::Leave(KZipArchiveError); |
|
180 } |
|
181 else |
|
182 if ((status = FindCentralDirectoryTrailer(offset)) != KErrNone) |
|
183 { |
|
184 DeleteMemberPointers(); |
|
185 User::Leave(status); |
|
186 } |
|
187 else |
|
188 if ((status = ReadCentralDirectoryTrailer(offset, iTrailer)) != KErrNone) |
|
189 { |
|
190 DeleteMemberPointers(); |
|
191 User::Leave(status); |
|
192 } |
|
193 else |
|
194 if (iTrailer.iStartDiskNumber != iTrailer.iDiskNumber) |
|
195 { |
|
196 DeleteMemberPointers(); |
|
197 User::Leave(KMultiDiskArchivesNotSupported); |
|
198 } |
|
199 else |
|
200 if ((iTrailer.iOffset > iFileLength) || |
|
201 ((iTrailer.iOffset + iTrailer.iSize) > iFileLength)) |
|
202 { |
|
203 DeleteMemberPointers(); |
|
204 User::Leave(KCentralDirectoryTrailerInvalid); |
|
205 } |
|
206 else |
|
207 if (LoadMemberPointersL() != KErrNone) |
|
208 { |
|
209 User::Leave(KZipFileIOError); |
|
210 } |
|
211 } |
|
212 |
|
213 /** |
|
214 Gets the size of the compressed data contained in the zip file in bytes |
|
215 Each CZipFile object has a compressed and uncompressed size. This method will |
|
216 return the compressed size of a zip file. |
|
217 |
|
218 @param aSize On return, the size of the compressed data in bytes |
|
219 @return KErrNotReady If object hasn't been properly constructed |
|
220 @return KErrCASizeNotDetermined If size could not be determined |
|
221 @return ... Any one of the system-wide error codes for other errors. |
|
222 */ |
|
223 EXPORT_C TInt CZipFile::Size(TInt& aSize) const |
|
224 { |
|
225 TInt err = KErrNotReady; |
|
226 if (iData) |
|
227 { |
|
228 TRAP(err, iData->DataSizeL(aSize)); |
|
229 } |
|
230 return err; |
|
231 } |
|
232 |
|
233 /** |
|
234 Constructs and returns a CZipFileMember object which is used to access |
|
235 information about a compressed file contained in the CZipFile archive. |
|
236 The name of the file to be searched for in the zipfile is case-sensitive. |
|
237 |
|
238 @param aName The name of the file to be searched in the zipfile |
|
239 @return the pointer to CZipFileMember object |
|
240 @return NULL if the file doesn't exist in the zipfile |
|
241 @leave ... Any one of the system-wide error codes for other errors. |
|
242 */ |
|
243 EXPORT_C CZipFileMember* CZipFile::MemberL(const TDesC& aName) |
|
244 { |
|
245 TLocalHeader header; |
|
246 const TMemberPointer* memberPointer; |
|
247 HBufC* localName = aName.AllocL(); |
|
248 TInt loop = 0; |
|
249 while (loop < localName->Length()) |
|
250 { |
|
251 if ((*localName)[loop] == '\\') |
|
252 { |
|
253 (localName->Des())[loop] = '/'; |
|
254 } |
|
255 loop++; |
|
256 } |
|
257 |
|
258 memberPointer = FindMemberPointer(*localName, EFalse); |
|
259 if (memberPointer == NULL) |
|
260 { |
|
261 delete localName; |
|
262 return NULL; |
|
263 } |
|
264 else |
|
265 if (ReadLocalHeader(memberPointer->iLocalHeaderOffset, header) != KErrNone) |
|
266 { |
|
267 delete localName; |
|
268 return NULL; |
|
269 } |
|
270 else |
|
271 { |
|
272 CleanupStack::PushL(localName); |
|
273 CZipFileMember* thisMember = MakeMemberL(*memberPointer, header); |
|
274 CleanupStack::PopAndDestroy(); // localName |
|
275 return thisMember; |
|
276 } |
|
277 } |
|
278 |
|
279 /** |
|
280 Constructs and returns a CZipFileMember object which is used to access |
|
281 information about a compressed file contained in the CZipFile archive. |
|
282 The name of the file to be searched for in the zipfile is case-insensitive. |
|
283 |
|
284 @param aName The name of the file to be searched in the zipfile |
|
285 @return A pointer to a member object of zip file |
|
286 @return NULL If the file doesn't exist in the zipfile |
|
287 @leave ... Any one of the system-wide error codes for other errors. |
|
288 */ |
|
289 EXPORT_C CZipFileMember* CZipFile::CaseInsensitiveMemberL(const TDesC& aName) |
|
290 { |
|
291 TLocalHeader header; |
|
292 const TMemberPointer* memberPointer; |
|
293 HBufC* localName = aName.AllocL(); |
|
294 TInt loop=0; |
|
295 while (loop < localName->Length()) |
|
296 { |
|
297 if ((*localName)[loop] == '\\') |
|
298 { |
|
299 (localName->Des())[loop] = '/'; |
|
300 } |
|
301 loop++; |
|
302 } |
|
303 |
|
304 memberPointer = FindMemberPointer(*localName, ETrue); |
|
305 if (memberPointer == NULL) |
|
306 { |
|
307 delete localName; |
|
308 return NULL; |
|
309 } |
|
310 else |
|
311 if (ReadLocalHeader(memberPointer->iLocalHeaderOffset, header) != KErrNone) |
|
312 { |
|
313 delete localName; |
|
314 return NULL; |
|
315 } |
|
316 else |
|
317 { |
|
318 CleanupStack::PushL(localName); |
|
319 CZipFileMember* thisMember = MakeMemberL(*memberPointer, header); |
|
320 CleanupStack::PopAndDestroy(); |
|
321 return thisMember; |
|
322 } |
|
323 |
|
324 } |
|
325 |
|
326 /** |
|
327 Constructs and returns a CZipFileMember object which is used to access |
|
328 information about a compressed file contained in the CZipFile archive. |
|
329 An exact match for the filename is searched for first. If a match is not found, |
|
330 a case-insensitive search is performed. If both filenames exist in the archive, |
|
331 the case-sensitive match will be returned. |
|
332 |
|
333 @param aName The name of the file to be searched in the zipfile |
|
334 @return A pointer to a member object of zip file |
|
335 @return NULL If the file doesn't exist in the zipfile |
|
336 @leave ... Any one of the system-wide error codes for other errors. |
|
337 */ |
|
338 EXPORT_C CZipFileMember* CZipFile::CaseSensitiveOrCaseInsensitiveMemberL(const TDesC& aName) |
|
339 { |
|
340 CZipFileMember* member; |
|
341 member = MemberL(aName); |
|
342 if (member) |
|
343 { |
|
344 return member; |
|
345 } |
|
346 else |
|
347 { |
|
348 return CaseInsensitiveMemberL(aName); |
|
349 } |
|
350 } |
|
351 |
|
352 /** |
|
353 Creates and returns the input stream for a file in the archive. Only files |
|
354 compressed with Stored or Deflated compression methods are supported. |
|
355 |
|
356 @param aMember The compressed file in the archive |
|
357 @param aStream On return, the stream to be used for reading the contents of the compressed file. The caller owns this object and is responsible for deleting it. |
|
358 @return KErrNone if successful |
|
359 @return KCompressionMethodNotSupported if compression format unsupported |
|
360 @return ... Any one of the system-wide error codes for other errors. |
|
361 @leave ... Any one of the system-wide error codes for other errors. |
|
362 */ |
|
363 EXPORT_C TInt CZipFile::GetInputStreamL(const CZipFileMember* aMember, RZipFileMemberReaderStream*& aStream) |
|
364 { |
|
365 TUint32 compressionMethod; |
|
366 |
|
367 compressionMethod = aMember->iCompressionMethod; |
|
368 if ((compressionMethod != EStored) && (compressionMethod != EDeflated)) |
|
369 { |
|
370 return KCompressionMethodNotSupported; |
|
371 } |
|
372 aStream = RZipFileMemberReaderStream::NewL( |
|
373 *this, |
|
374 aMember->iDataOffset, |
|
375 aMember->iCompressedSize, |
|
376 aMember->iUncompressedSize, |
|
377 compressionMethod); |
|
378 return KErrNone; |
|
379 } |
|
380 |
|
381 |
|
382 |
|
383 /** |
|
384 Gets the iterator used for iterating through the files contained in the ZIP |
|
385 file. It is the caller's responsibility to release the iterator when finsihed. |
|
386 |
|
387 @return Pointer to a newly allocated CZipFileMemberIterator object |
|
388 @leave ... Any one of the system-wide error codes for other errors. |
|
389 */ |
|
390 EXPORT_C CZipFileMemberIterator* CZipFile::GetMembersL() |
|
391 { |
|
392 return new (ELeave) CZipFileMemberIterator(this); |
|
393 } |
|
394 |
|
395 |
|
396 |
|
397 // Implementation |
|
398 |
|
399 /* |
|
400 * Find the 'end of central directory record'. This is at the 'end' of |
|
401 * the file, but since it is not a fixed length structure, we have to |
|
402 * hunt for it. |
|
403 * |
|
404 * We try assuming that the variable length section of the record is |
|
405 * empty, which usually appears to be the case. |
|
406 * |
|
407 * If this does not work we resort to 'walking backwards' through the |
|
408 * file looking for the signature bytes. |
|
409 * |
|
410 */ |
|
411 |
|
412 TInt CZipFile::FindCentralDirectoryTrailer(TUint32& offset) |
|
413 { |
|
414 TBuf8<KSignatureLength> signature; |
|
415 |
|
416 if (iFileLength <= KCentralDirectoryTrailerFixedLength) |
|
417 { |
|
418 return KZipArchiveError; |
|
419 } |
|
420 // Try the obvious place first.Assuming that the comment (variable |
|
421 // length section) is empty,try to find the signature at the offset. |
|
422 offset = iFileLength - KCentralDirectoryTrailerFixedLength; |
|
423 if (Seek(offset) != KErrNone) |
|
424 { |
|
425 return KZipFileIOError; |
|
426 } |
|
427 TInt err = iData->Read(signature); |
|
428 |
|
429 if ( err != KErrNone) |
|
430 { |
|
431 return KZipFileIOError; |
|
432 } |
|
433 |
|
434 if ((signature[0] == 0x50) && |
|
435 (signature[1] == 0x4b) && |
|
436 (signature[2] == 0x05) && |
|
437 (signature[3] == 0x06)) |
|
438 { |
|
439 return KErrNone; |
|
440 } |
|
441 else |
|
442 { |
|
443 // There must be some comments, hence the central directory |
|
444 // record > 22 bytes. |
|
445 // This is a slow but fairly obvious way of searching |
|
446 // backwards through the file starting from the offset. |
|
447 TUint EndOfTrailerSearch = 0; //Upto beginning of File |
|
448 |
|
449 if(iFileLength > KMaxTrailerSearchLength+KCentralDirectoryTrailerFixedLength) |
|
450 EndOfTrailerSearch = offset - KMaxTrailerSearchLength; //Upto Last 64K+22 bytes |
|
451 |
|
452 while (offset >= EndOfTrailerSearch) |
|
453 { |
|
454 if (Seek(offset) != KErrNone) |
|
455 { |
|
456 return KZipFileIOError; |
|
457 } |
|
458 if (iData->Read(signature) != KErrNone) |
|
459 { |
|
460 return KZipFileIOError; |
|
461 } |
|
462 if ((signature[0] == 0x50) && |
|
463 (signature[1] == 0x4b) && |
|
464 (signature[2] == 0x05) && |
|
465 (signature[3] == 0x06)) |
|
466 { |
|
467 return KErrNone; |
|
468 } |
|
469 --offset; |
|
470 } |
|
471 return KCentralDirectoryTrailerNotFound; |
|
472 } |
|
473 } |
|
474 |
|
475 TInt CZipFile::ReadCentralDirectoryTrailer(TUint32 offset, struct TCentralDirectoryTrailer& r ) |
|
476 { |
|
477 // Skip the signature |
|
478 if (Seek(offset + KSignatureLength) != KErrNone) |
|
479 { |
|
480 return KZipFileIOError; |
|
481 } |
|
482 else |
|
483 if (Read(r.iDiskNumber) != KErrNone) |
|
484 { |
|
485 return KZipFileIOError; |
|
486 } |
|
487 else |
|
488 if (Read(r.iStartDiskNumber)!= KErrNone) |
|
489 { |
|
490 return KZipFileIOError; |
|
491 } |
|
492 else |
|
493 if (Read(r.iLocalEntryCount) != KErrNone) |
|
494 { |
|
495 return KZipFileIOError; |
|
496 } |
|
497 else |
|
498 if (Read(r.iTotalEntryCount) != KErrNone) |
|
499 { |
|
500 return KZipFileIOError; |
|
501 } |
|
502 else |
|
503 if (Read(r.iSize) != KErrNone) |
|
504 { |
|
505 return KZipFileIOError; |
|
506 } |
|
507 else |
|
508 if (Read(r.iOffset) != KErrNone) |
|
509 { |
|
510 return KZipFileIOError; |
|
511 } |
|
512 else |
|
513 { |
|
514 return KErrNone; |
|
515 } |
|
516 } |
|
517 |
|
518 TInt CZipFile::LoadMemberPointersL(void) |
|
519 { |
|
520 TCentralDirectoryHeader header; |
|
521 TUint32 i; |
|
522 TUint32 memberPointerCount; |
|
523 |
|
524 if (Seek(iTrailer.iOffset) != KErrNone) |
|
525 { |
|
526 return KZipFileIOError; |
|
527 } |
|
528 memberPointerCount = iTrailer.iTotalEntryCount; |
|
529 iMemberPointers = new (ELeave) TMemberPointer[memberPointerCount]; |
|
530 for (i = 0; i < memberPointerCount; i++) |
|
531 { |
|
532 iMemberPointers[i].iName = NULL; |
|
533 } |
|
534 CCnvCharacterSetConverter* converter = CCnvCharacterSetConverter::NewL(); |
|
535 CleanupStack::PushL(converter); |
|
536 TInt converterState = CCnvCharacterSetConverter::KStateDefault; |
|
537 for (i = 0; i < memberPointerCount; i++) |
|
538 { |
|
539 if (ReadCentralDirectoryHeaderL(header, iMemberPointers[i], converter, converterState) != KErrNone) |
|
540 { |
|
541 return KZipFileError; |
|
542 } |
|
543 } |
|
544 CleanupStack::PopAndDestroy(converter); |
|
545 return KErrNone; |
|
546 } |
|
547 |
|
548 static void ConvertFileNameToUnicodeL( |
|
549 TDes16& aUnicode, |
|
550 const TDesC8& aForeign, |
|
551 const TUint16& aMadeBy, |
|
552 CCnvCharacterSetConverter* aConverter, |
|
553 TInt aConverterState, |
|
554 RFs aFs) |
|
555 // Have to decide whether filename encoding is CP850 or CP1252. According to tec support |
|
556 // at WinZip, if 'madeby' is set to DOS(0) then the encoding is CP850 and if it's set to |
|
557 // NTFS (11) then it's CP1252. However, if the MS Compressed Folders program was used |
|
558 // to zip, then madeby is always set to NTFS and the encoding is always CP850 - the exact |
|
559 // opposite. Because of this confusion, I have written a very basic decision algorithm |
|
560 // based on the premise that filenames are likely to use alphabet-style extended |
|
561 // characters (rather than box edges or punctuation etc.) |
|
562 { |
|
563 TInt len = aForeign.Length(); |
|
564 TInt ANSIpoints = 0; |
|
565 TInt OEMpoints = 0; |
|
566 for (TInt i=0; i<len; i++) |
|
567 { |
|
568 if (aForeign[i] >= 128 && aForeign[i] <= 165) |
|
569 OEMpoints ++; |
|
570 if (aForeign[i] >= 192 && aForeign[i] <= 255) |
|
571 ANSIpoints ++; |
|
572 } |
|
573 if (ANSIpoints == OEMpoints) |
|
574 { |
|
575 if (aMadeBy>>8) //only interested in the upper byte |
|
576 ANSIpoints ++; |
|
577 else |
|
578 OEMpoints ++; |
|
579 } |
|
580 TInt unconvertibleChars = 0; |
|
581 |
|
582 CCnvCharacterSetConverter::TAvailability availabilty = CCnvCharacterSetConverter::EAvailable; |
|
583 if (ANSIpoints > OEMpoints) |
|
584 { |
|
585 // It's probably ANSI (CP1252) |
|
586 availabilty = aConverter->PrepareToConvertToOrFromL(KCharacterSetIdentifierCodePage1252,aFs); |
|
587 aConverter->ConvertToUnicode(aUnicode, aForeign, aConverterState, unconvertibleChars); |
|
588 |
|
589 } |
|
590 if (OEMpoints > ANSIpoints || unconvertibleChars) |
|
591 { |
|
592 // It's definitely OEM (CP850) |
|
593 availabilty = aConverter->PrepareToConvertToOrFromL(KCharacterSetIdentifierCP850,aFs); |
|
594 if(availabilty != CCnvCharacterSetConverter::EAvailable ) |
|
595 { |
|
596 //if cp850 plugin is not available, use cp1252 |
|
597 availabilty = aConverter->PrepareToConvertToOrFromL(KCharacterSetIdentifierCodePage1252, aFs); |
|
598 if(availabilty != CCnvCharacterSetConverter::EAvailable) |
|
599 User::Leave (KErrNotSupported); |
|
600 } |
|
601 |
|
602 aConverter->ConvertToUnicode(aUnicode, aForeign, aConverterState); |
|
603 |
|
604 } |
|
605 } |
|
606 |
|
607 TInt CZipFile::ReadCentralDirectoryHeaderL( |
|
608 TCentralDirectoryHeader& aHeader, |
|
609 TMemberPointer& aMemberPointer, |
|
610 CCnvCharacterSetConverter* aConverter, |
|
611 TInt aConverterState) |
|
612 /* |
|
613 As this function might be called many times and the request will |
|
614 eventually be translated to calls to server to read the data, |
|
615 so performance is the major issue. Try to minimize calls to server. |
|
616 Read data in a chunk rather than member-by-member. |
|
617 */ |
|
618 { |
|
619 TByte tmpHeader[KCentralDirectoryHeaderFixedLength]; |
|
620 |
|
621 if (Read(tmpHeader,KCentralDirectoryHeaderFixedLength) != KErrNone) |
|
622 { |
|
623 return KZipFileIOError; |
|
624 } |
|
625 |
|
626 Mem::Copy(&aHeader.iSignature, &tmpHeader[0], 4); |
|
627 |
|
628 if (aHeader.iSignature != KCentralDirectoryHeaderSignature) |
|
629 { |
|
630 return KZipFileIOError; |
|
631 } |
|
632 |
|
633 Mem::Copy(&aHeader.iMadeBy, &tmpHeader[4], 2); |
|
634 Mem::Copy(&aHeader.iRequired, &tmpHeader[6], 2); |
|
635 Mem::Copy(&aHeader.iFlags, &tmpHeader[8], 2); |
|
636 Mem::Copy(&aHeader.iCompressionMethod, &tmpHeader[10], 2); |
|
637 Mem::Copy(&aHeader.iLastModifiedFileTime, &tmpHeader[12], 2); |
|
638 Mem::Copy(&aHeader.iLastModifiedFileDate, &tmpHeader[14], 2); |
|
639 Mem::Copy(&aHeader.iCRC32, &tmpHeader[16], 4); |
|
640 Mem::Copy(&aHeader.iCompressedSize, &tmpHeader[20], 4); |
|
641 Mem::Copy(&aHeader.iUncompressedSize, &tmpHeader[24], 4); |
|
642 Mem::Copy(&aHeader.iFileNameLength, &tmpHeader[28], 2); |
|
643 Mem::Copy(&aHeader.iExtraFieldLength, &tmpHeader[30], 2); |
|
644 Mem::Copy(&aHeader.iFileCommentLength, &tmpHeader[32], 2); |
|
645 Mem::Copy(&aHeader.iDiskNumberStart, &tmpHeader[34], 2); |
|
646 Mem::Copy(&aHeader.iInternalFileAttributes, &tmpHeader[36], 2); |
|
647 Mem::Copy(&aHeader.iExternalFileAttributes, &tmpHeader[38], 4); |
|
648 Mem::Copy(&aHeader.iLocalHeaderOffset, &tmpHeader[42], 4); |
|
649 |
|
650 aMemberPointer.iCRC32 = aHeader.iCRC32; |
|
651 aMemberPointer.iCompressedSize = aHeader.iCompressedSize; |
|
652 aMemberPointer.iUncompressedSize = aHeader.iUncompressedSize; |
|
653 aMemberPointer.iLocalHeaderOffset = aHeader.iLocalHeaderOffset; |
|
654 aMemberPointer.iName = new(ELeave) TFileName; |
|
655 |
|
656 TBuf8<KMaxFileName> input; |
|
657 if (iData->Read(input, aHeader.iFileNameLength) != KErrNone) |
|
658 { |
|
659 return KZipFileIOError; |
|
660 } |
|
661 ConvertFileNameToUnicodeL(*aMemberPointer.iName, input, aHeader.iMadeBy, aConverter, aConverterState, iFs); |
|
662 |
|
663 // Ignore the remaining fields |
|
664 TInt pos; |
|
665 |
|
666 pos = aHeader.iExtraFieldLength; |
|
667 if (pos != 0) |
|
668 { |
|
669 // Don't pass aHeader.iExtraFieldLength in place of pos |
|
670 // as the below function will update the content of that variable. |
|
671 // In this case, the function is used to ignore the data |
|
672 // by just moving the current file pointer location. |
|
673 if (iData->Seek(ESeekCurrent, pos) != KErrNone) |
|
674 { |
|
675 return KZipFileIOError; |
|
676 } |
|
677 } |
|
678 |
|
679 pos = aHeader.iFileCommentLength; |
|
680 if (pos != 0) |
|
681 { |
|
682 // Don't pass aHeader.iFileCommentLength in place of pos |
|
683 // as the below function will update the content of that variable. |
|
684 // In this case, the function is used to ignore the data |
|
685 // by just moving the current file pointer location. |
|
686 if (iData->Seek(ESeekCurrent, pos) != KErrNone) |
|
687 { |
|
688 return KZipFileIOError; |
|
689 } |
|
690 } |
|
691 |
|
692 return KErrNone; |
|
693 } |
|
694 |
|
695 TInt CZipFile::ReadLocalHeader(TUint32 aOffset, TLocalHeader& aHeader) |
|
696 /* |
|
697 As this function might be called many times and the request will |
|
698 eventually be translated to calls to server to read the data, |
|
699 so performance is the major issue. Try to minimize calls to server. |
|
700 Read data in a chunk rather than member-by-member. |
|
701 */ |
|
702 { |
|
703 TByte tmpHeader[KLocalHeaderFixedLength]; |
|
704 |
|
705 if (Seek(aOffset) != KErrNone) |
|
706 { |
|
707 return KZipFileIOError; |
|
708 } |
|
709 if (Read(tmpHeader,KLocalHeaderFixedLength) != KErrNone) |
|
710 { |
|
711 return KZipFileIOError; |
|
712 } |
|
713 Mem::Copy(&aHeader.iSignature, &tmpHeader[0], 4); |
|
714 |
|
715 if (aHeader.iSignature != KLocalHeaderSignature) |
|
716 { |
|
717 return KLocalHeaderSignatureInvalid; |
|
718 } |
|
719 |
|
720 Mem::Copy(&aHeader.iVersionNeeded, &tmpHeader[4], 2); |
|
721 Mem::Copy(&aHeader.iFlags, &tmpHeader[6], 2); |
|
722 Mem::Copy(&aHeader.iCompressionMethod, &tmpHeader[8], 2); |
|
723 Mem::Copy(&aHeader.iLastModifiedFileTime, &tmpHeader[10], 2); |
|
724 Mem::Copy(&aHeader.iLastModifiedFileDate, &tmpHeader[12], 2); |
|
725 Mem::Copy(&aHeader.iCRC32, &tmpHeader[14], 4); |
|
726 Mem::Copy(&aHeader.iCompressedSize, &tmpHeader[18], 4); |
|
727 Mem::Copy(&aHeader.iUncompressedSize, &tmpHeader[22], 4); |
|
728 Mem::Copy(&aHeader.iFileNameLength, &tmpHeader[26], 2); |
|
729 Mem::Copy(&aHeader.iExtraFieldLength, &tmpHeader[28], 2); |
|
730 |
|
731 return KErrNone; |
|
732 } |
|
733 |
|
734 const CZipFile::TMemberPointer* CZipFile::FindMemberPointer(const TDesC& aName, TBool aCaseInsensitive) |
|
735 { |
|
736 for (TUint32 i = 0; i < iTrailer.iTotalEntryCount; i++) |
|
737 { |
|
738 if (aCaseInsensitive && (!aName.CompareF(*iMemberPointers[i].iName))) |
|
739 { |
|
740 return iMemberPointers + i; |
|
741 } |
|
742 else if (aName == *iMemberPointers[i].iName) |
|
743 { |
|
744 return iMemberPointers + i; |
|
745 } |
|
746 } |
|
747 return NULL; |
|
748 } |
|
749 |
|
750 RZipFileMemberReaderStream* CZipFile::MakeInputStreamL( |
|
751 TUint32 aDataOffset, |
|
752 TUint32 aCompressedSize, |
|
753 TUint32 aUncompressedSize, |
|
754 TUint32 aCompressionMethod) |
|
755 { |
|
756 return RZipFileMemberReaderStream::NewL( |
|
757 *this, |
|
758 aDataOffset, |
|
759 aCompressedSize, |
|
760 aUncompressedSize, |
|
761 aCompressionMethod); |
|
762 } |
|
763 |
|
764 CZipFileMember* CZipFile::MakeMemberL(TInt aMemberIndex) |
|
765 { |
|
766 TLocalHeader header; |
|
767 TMemberPointer* memberPointer; |
|
768 |
|
769 if (aMemberIndex >= iTrailer.iTotalEntryCount) |
|
770 { |
|
771 return NULL; |
|
772 } |
|
773 memberPointer = iMemberPointers + aMemberIndex; |
|
774 if (ReadLocalHeader(memberPointer->iLocalHeaderOffset, header) != KErrNone) |
|
775 { |
|
776 return NULL; |
|
777 } |
|
778 else |
|
779 { |
|
780 return MakeMemberL(*memberPointer, header); |
|
781 } |
|
782 } |
|
783 |
|
784 CZipFileMember* CZipFile::MakeMemberL( |
|
785 const TMemberPointer& aMemberPointer, |
|
786 const TLocalHeader& aHeader) |
|
787 { |
|
788 CZipFileMember* member; |
|
789 |
|
790 member = new (ELeave) CZipFileMember; |
|
791 CleanupStack::PushL(member); |
|
792 member->iCRC32 = aMemberPointer.iCRC32; |
|
793 member->iCompressedSize = aMemberPointer.iCompressedSize; |
|
794 member->iCompressionMethod = aHeader.iCompressionMethod; |
|
795 member->iName = new (ELeave) TFileName(*aMemberPointer.iName); |
|
796 TInt loop=0; |
|
797 while (loop < member->iName->Length()) |
|
798 { |
|
799 if ((*member->iName)[loop] == '/') |
|
800 { |
|
801 (*member->iName)[loop] = '\\'; |
|
802 } |
|
803 loop++; |
|
804 } |
|
805 member->iUncompressedSize = aMemberPointer.iUncompressedSize; |
|
806 member->iDataOffset = aMemberPointer.iLocalHeaderOffset + |
|
807 KLocalHeaderFixedLength + |
|
808 aHeader.iFileNameLength + |
|
809 aHeader.iExtraFieldLength; |
|
810 CleanupStack::Pop(); |
|
811 return member; |
|
812 } |
|
813 |
|
814 void CZipFile::DeleteMemberPointers() |
|
815 { |
|
816 if (iMemberPointers) |
|
817 { |
|
818 for (TUint32 i = 0; i < iTrailer.iTotalEntryCount; i++) |
|
819 { |
|
820 delete iMemberPointers[i].iName; |
|
821 } |
|
822 delete[] iMemberPointers; |
|
823 iMemberPointers = 0; |
|
824 } |
|
825 |
|
826 delete iData; |
|
827 iData = NULL; |
|
828 return; |
|
829 } |
|
830 |
|
831 void CZipFile::OpenFileL(const TDesC& aFileName) |
|
832 { |
|
833 // We need to look at the session path of the filesystem passed |
|
834 // in to derive the fullpath of the file to open |
|
835 HBufC* sessionPath = HBufC::NewLC(KMaxFileName); |
|
836 TPtr ptr(sessionPath->Des()); |
|
837 User::LeaveIfError(iFs.SessionPath(ptr)); |
|
838 TParse parse; |
|
839 User::LeaveIfError(parse.Set(aFileName, sessionPath, NULL)); |
|
840 |
|
841 // Use the full name derived from the session path |
|
842 ContentAccess::CContent* content = |
|
843 ContentAccess::CContent::NewL(parse.FullName()); |
|
844 CleanupStack::PushL(content); |
|
845 iData = content->OpenContentL(ContentAccess::EPeek); |
|
846 |
|
847 // Parent content object no longer needed because we only need data |
|
848 CleanupStack::PopAndDestroy(content); |
|
849 |
|
850 // Seek to the end |
|
851 TInt length = 0; |
|
852 User::LeaveIfError(iData->Seek(ESeekEnd, length)); |
|
853 iFileLength = length; |
|
854 CleanupStack::PopAndDestroy(sessionPath); |
|
855 } |
|
856 |
|
857 TInt CZipFile::Read(TUint16& aUs) |
|
858 { |
|
859 TPckgBuf<TUint16> temp(aUs); |
|
860 |
|
861 if (iData->Read(temp) != KErrNone) |
|
862 { |
|
863 return KZipFileIOError; |
|
864 } |
|
865 |
|
866 aUs=temp(); |
|
867 return KErrNone; |
|
868 } |
|
869 |
|
870 TInt CZipFile::Read(TUint32& aUl) |
|
871 { |
|
872 TPckgBuf<TUint32> temp; |
|
873 |
|
874 if (iData->Read(temp) != KErrNone) |
|
875 { |
|
876 return KZipFileIOError; |
|
877 } |
|
878 aUl=temp(); |
|
879 return KErrNone; |
|
880 } |
|
881 |
|
882 TInt CZipFile::Read(TByte* aBytes, TUint32 aLength) |
|
883 |
|
884 { |
|
885 TPtr8 ptr(aBytes, aLength); |
|
886 if(iData->Read(ptr, aLength)) |
|
887 { |
|
888 return KZipFileIOError; |
|
889 } |
|
890 else |
|
891 { |
|
892 return KErrNone; |
|
893 } |
|
894 } |
|
895 |
|
896 TInt CZipFile::Seek(TInt aOffset) |
|
897 { |
|
898 if (iData->Seek(ESeekStart, aOffset) < 0) |
|
899 { |
|
900 return KZipFileIOError; |
|
901 } |
|
902 else |
|
903 { |
|
904 return KErrNone; |
|
905 } |
|
906 } |
|
907 |