1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
|
// Chm/Handler.cpp
#include "StdAfx.h"
#include "Common/StringConvert.h"
#include "Common/Defs.h"
#include "Common/UTFConvert.h"
#include "Common/ComTry.h"
#include "Windows/PropVariant.h"
#include "Windows/Time.h"
#include "../../Common/LimitedStreams.h"
#include "../../Common/StreamUtils.h"
#include "../../Common/ProgressUtils.h"
#include "../../Compress/Copy/CopyCoder.h"
#include "../../Compress/Lzx/LzxDecoder.h"
#include "../Common/ItemNameUtils.h"
#include "ChmHandler.h"
using namespace NWindows;
using namespace NTime;
namespace NArchive {
namespace NChm {
// #define _CHM_DETAILS
#ifdef _CHM_DETAILS
enum
{
kpidSection = kpidUserDefined
};
#endif
STATPROPSTG kProps[] =
{
{ NULL, kpidPath, VT_BSTR},
// { NULL, kpidIsFolder, VT_BOOL},
{ NULL, kpidSize, VT_UI8},
{ NULL, kpidMethod, VT_BSTR},
{ NULL, kpidBlock, VT_UI4}
#ifdef _CHM_DETAILS
,
{ L"Section", kpidSection, VT_UI4},
{ NULL, kpidOffset, VT_UI4}
#endif
};
STATPROPSTG kArcProps[] =
{
{ NULL, kpidNumBlocks, VT_UI8}
};
IMP_IInArchive_Props
IMP_IInArchive_ArcProps_NO
/*
IMP_IInArchive_ArcProps
STDMETHODIMP CHandler::GetArchiveProperty(PROPID propID, PROPVARIANT *value)
{
COM_TRY_BEGIN
NWindows::NCOM::CPropVariant prop;
switch(propID)
{
case kpidNumBlocks:
{
UInt64 numBlocks = 0;
for (int i = 0; i < m_Database.Sections.Size(); i++)
{
const CSectionInfo &s = m_Database.Sections[i];
for (int j = 0; j < s.Methods.Size(); j++)
{
const CMethodInfo &m = s.Methods[j];
if (m.IsLzx())
numBlocks += m.LzxInfo.ResetTable.GetNumBlocks();
}
}
prop = numBlocks;
break;
}
}
prop.Detach(value);
return S_OK;
COM_TRY_END
}
*/
STDMETHODIMP CHandler::GetProperty(UInt32 index, PROPID propID, PROPVARIANT *value)
{
COM_TRY_BEGIN
NWindows::NCOM::CPropVariant prop;
if (m_Database.NewFormat)
{
switch(propID)
{
case kpidSize:
prop = (UInt64)m_Database.NewFormatString.Length();
break;
}
prop.Detach(value);
return S_OK;
}
int entryIndex;
if (m_Database.LowLevel)
entryIndex = index;
else
entryIndex = m_Database.Indices[index];
const CItem &item = m_Database.Items[entryIndex];
switch(propID)
{
case kpidPath:
{
UString us;
if (ConvertUTF8ToUnicode(item.Name, us))
{
if (!m_Database.LowLevel)
{
if (us.Length() > 1)
if (us[0] == L'/')
us.Delete(0);
}
prop = NItemName::GetOSName2(us);
}
break;
}
case kpidIsFolder:
prop = item.IsDirectory();
break;
case kpidSize:
prop = item.Size;
break;
case kpidMethod:
{
if (!item.IsDirectory())
if (item.Section == 0)
prop = L"Copy";
else if (item.Section < m_Database.Sections.Size())
prop = m_Database.Sections[(int)item.Section].GetMethodName();
break;
}
case kpidBlock:
if (m_Database.LowLevel)
prop = item.Section;
else if (item.Section != 0)
prop = m_Database.GetFolder(index);
break;
#ifdef _CHM_DETAILS
case kpidSection:
prop = (UInt32)item.Section;
break;
case kpidOffset:
prop = (UInt32)item.Offset;
break;
#endif
}
prop.Detach(value);
return S_OK;
COM_TRY_END
}
class CPropgressImp: public CProgressVirt
{
CMyComPtr<IArchiveOpenCallback> m_OpenArchiveCallback;
public:
STDMETHOD(SetTotal)(const UInt64 *numFiles);
STDMETHOD(SetCompleted)(const UInt64 *numFiles);
void Init(IArchiveOpenCallback *openArchiveCallback)
{ m_OpenArchiveCallback = openArchiveCallback; }
};
STDMETHODIMP CPropgressImp::SetTotal(const UInt64 *numFiles)
{
if (m_OpenArchiveCallback)
return m_OpenArchiveCallback->SetCompleted(numFiles, NULL);
return S_OK;
}
STDMETHODIMP CPropgressImp::SetCompleted(const UInt64 *numFiles)
{
if (m_OpenArchiveCallback)
return m_OpenArchiveCallback->SetCompleted(numFiles, NULL);
return S_OK;
}
STDMETHODIMP CHandler::Open(IInStream *inStream,
const UInt64 *maxCheckStartPosition,
IArchiveOpenCallback *openArchiveCallback)
{
COM_TRY_BEGIN
m_Stream.Release();
try
{
CInArchive archive;
CPropgressImp progressImp;
progressImp.Init(openArchiveCallback);
RINOK(archive.Open(inStream, maxCheckStartPosition, m_Database));
/*
if (m_Database.LowLevel)
return S_FALSE;
*/
m_Stream = inStream;
}
catch(...)
{
return S_FALSE;
}
return S_OK;
COM_TRY_END
}
STDMETHODIMP CHandler::Close()
{
m_Database.Clear();
m_Stream.Release();
return S_OK;
}
class CChmFolderOutStream:
public ISequentialOutStream,
public CMyUnknownImp
{
public:
MY_UNKNOWN_IMP
HRESULT Write2(const void *data, UInt32 size, UInt32 *processedSize, bool isOK);
STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize);
UInt64 m_FolderSize;
UInt64 m_PosInFolder;
UInt64 m_PosInSection;
const CRecordVector<bool> *m_ExtractStatuses;
int m_StartIndex;
int m_CurrentIndex;
int m_NumFiles;
private:
const CFilesDatabase *m_Database;
CMyComPtr<IArchiveExtractCallback> m_ExtractCallback;
bool m_TestMode;
bool m_IsOk;
bool m_FileIsOpen;
UInt64 m_RemainFileSize;
CMyComPtr<ISequentialOutStream> m_RealOutStream;
HRESULT OpenFile();
HRESULT WriteEmptyFiles();
public:
void Init(
const CFilesDatabase *database,
IArchiveExtractCallback *extractCallback,
bool testMode);
HRESULT FlushCorrupted(UInt64 maxSize);
};
void CChmFolderOutStream::Init(
const CFilesDatabase *database,
IArchiveExtractCallback *extractCallback,
bool testMode)
{
m_Database = database;
m_ExtractCallback = extractCallback;
m_TestMode = testMode;
m_CurrentIndex = 0;
m_FileIsOpen = false;
}
HRESULT CChmFolderOutStream::OpenFile()
{
Int32 askMode = (*m_ExtractStatuses)[m_CurrentIndex] ? (m_TestMode ?
NExtract::NAskMode::kTest :
NExtract::NAskMode::kExtract) :
NExtract::NAskMode::kSkip;
m_RealOutStream.Release();
RINOK(m_ExtractCallback->GetStream(m_StartIndex + m_CurrentIndex, &m_RealOutStream, askMode));
if (!m_RealOutStream && !m_TestMode)
askMode = NArchive::NExtract::NAskMode::kSkip;
return m_ExtractCallback->PrepareOperation(askMode);
}
HRESULT CChmFolderOutStream::WriteEmptyFiles()
{
if (m_FileIsOpen)
return S_OK;
for (;m_CurrentIndex < m_NumFiles; m_CurrentIndex++)
{
UInt64 fileSize = m_Database->GetFileSize(m_StartIndex + m_CurrentIndex);
if (fileSize != 0)
return S_OK;
HRESULT result = OpenFile();
m_RealOutStream.Release();
RINOK(result);
RINOK(m_ExtractCallback->SetOperationResult(NArchive::NExtract::NOperationResult::kOK));
}
return S_OK;
}
// This is WritePart function
HRESULT CChmFolderOutStream::Write2(const void *data, UInt32 size, UInt32 *processedSize, bool isOK)
{
UInt32 realProcessed = 0;
if (processedSize != NULL)
*processedSize = 0;
while(size != 0)
{
if (m_FileIsOpen)
{
UInt32 numBytesToWrite = (UInt32)MyMin(m_RemainFileSize, (UInt64)(size));
HRESULT res = S_OK;
if (numBytesToWrite > 0)
{
if (!isOK)
m_IsOk = false;
if (m_RealOutStream)
{
UInt32 processedSizeLocal = 0;
res = m_RealOutStream->Write((const Byte *)data, numBytesToWrite, &processedSizeLocal);
numBytesToWrite = processedSizeLocal;
}
}
realProcessed += numBytesToWrite;
if (processedSize != NULL)
*processedSize = realProcessed;
data = (const void *)((const Byte *)data + numBytesToWrite);
size -= numBytesToWrite;
m_RemainFileSize -= numBytesToWrite;
m_PosInSection += numBytesToWrite;
m_PosInFolder += numBytesToWrite;
if (res != S_OK)
return res;
if (m_RemainFileSize == 0)
{
m_RealOutStream.Release();
RINOK(m_ExtractCallback->SetOperationResult(
m_IsOk ?
NArchive::NExtract::NOperationResult::kOK:
NArchive::NExtract::NOperationResult::kDataError));
m_FileIsOpen = false;
}
if (realProcessed > 0)
break; // with this break this function works as write part
}
else
{
if (m_CurrentIndex >= m_NumFiles)
return E_FAIL;
int fullIndex = m_StartIndex + m_CurrentIndex;
m_RemainFileSize = m_Database->GetFileSize(fullIndex);
UInt64 fileOffset = m_Database->GetFileOffset(fullIndex);
if (fileOffset < m_PosInSection)
return E_FAIL;
if (fileOffset > m_PosInSection)
{
UInt32 numBytesToWrite = (UInt32)MyMin(fileOffset - m_PosInSection, UInt64(size));
realProcessed += numBytesToWrite;
if (processedSize != NULL)
*processedSize = realProcessed;
data = (const void *)((const Byte *)data + numBytesToWrite);
size -= numBytesToWrite;
m_PosInSection += numBytesToWrite;
m_PosInFolder += numBytesToWrite;
}
if (fileOffset == m_PosInSection)
{
RINOK(OpenFile());
m_FileIsOpen = true;
m_CurrentIndex++;
m_IsOk = true;
}
}
}
return WriteEmptyFiles();
}
STDMETHODIMP CChmFolderOutStream::Write(const void *data, UInt32 size, UInt32 *processedSize)
{
return Write2(data, size, processedSize, true);
}
HRESULT CChmFolderOutStream::FlushCorrupted(UInt64 maxSize)
{
const UInt32 kBufferSize = (1 << 10);
Byte buffer[kBufferSize];
for (int i = 0; i < kBufferSize; i++)
buffer[i] = 0;
if (maxSize > m_FolderSize)
maxSize = m_FolderSize;
while (m_PosInFolder < maxSize)
{
UInt32 size = (UInt32)MyMin(maxSize - m_PosInFolder, (UInt64)kBufferSize);
UInt32 processedSizeLocal = 0;
RINOK(Write2(buffer, size, &processedSizeLocal, false));
if (processedSizeLocal == 0)
return S_OK;
}
return S_OK;
}
STDMETHODIMP CHandler::Extract(const UInt32* indices, UInt32 numItems,
Int32 _aTestMode, IArchiveExtractCallback *extractCallback)
{
COM_TRY_BEGIN
bool allFilesMode = (numItems == UInt32(-1));
if (allFilesMode)
numItems = m_Database.NewFormat ? 1:
(m_Database.LowLevel ?
m_Database.Items.Size():
m_Database.Indices.Size());
if (numItems == 0)
return S_OK;
bool testMode = (_aTestMode != 0);
UInt64 currentTotalSize = 0;
NCompress::CCopyCoder *copyCoderSpec = new NCompress::CCopyCoder();
CMyComPtr<ICompressCoder> copyCoder = copyCoderSpec;
UInt32 i;
CLocalProgress *lps = new CLocalProgress;
CMyComPtr<ICompressProgressInfo> progress = lps;
lps->Init(extractCallback, false);
CLimitedSequentialInStream *streamSpec = new CLimitedSequentialInStream;
CMyComPtr<ISequentialInStream> inStream(streamSpec);
streamSpec->SetStream(m_Stream);
if (m_Database.LowLevel)
{
UInt64 currentItemSize = 0;
UInt64 totalSize = 0;
if (m_Database.NewFormat)
totalSize = m_Database.NewFormatString.Length();
else
for (i = 0; i < numItems; i++)
totalSize += m_Database.Items[allFilesMode ? i : indices[i]].Size;
extractCallback->SetTotal(totalSize);
for (i = 0; i < numItems; i++, currentTotalSize += currentItemSize)
{
currentItemSize = 0;
lps->InSize = currentTotalSize; // Change it
lps->OutSize = currentTotalSize;
RINOK(lps->SetCur());
CMyComPtr<ISequentialOutStream> realOutStream;
Int32 askMode= testMode ?
NArchive::NExtract::NAskMode::kTest :
NArchive::NExtract::NAskMode::kExtract;
Int32 index = allFilesMode ? i : indices[i];
RINOK(extractCallback->GetStream(index, &realOutStream, askMode));
if (m_Database.NewFormat)
{
if (index != 0)
return E_FAIL;
if (!testMode && (!realOutStream))
continue;
if (!testMode)
{
UInt32 size = m_Database.NewFormatString.Length();
RINOK(WriteStream(realOutStream, (const char *)m_Database.NewFormatString, size));
}
RINOK(extractCallback->SetOperationResult(NArchive::NExtract::NOperationResult::kOK));
continue;
}
const CItem &item = m_Database.Items[index];
currentItemSize = item.Size;
if (!testMode && (!realOutStream))
continue;
RINOK(extractCallback->PrepareOperation(askMode));
if (item.Section != 0)
{
RINOK(extractCallback->SetOperationResult(NArchive::NExtract::NOperationResult::kUnSupportedMethod));
continue;
}
if (testMode)
{
RINOK(extractCallback->SetOperationResult(NArchive::NExtract::NOperationResult::kOK));
continue;
}
RINOK(m_Stream->Seek(m_Database.ContentOffset + item.Offset, STREAM_SEEK_SET, NULL));
streamSpec->Init(item.Size);
RINOK(copyCoder->Code(inStream, realOutStream, NULL, NULL, progress));
realOutStream.Release();
RINOK(extractCallback->SetOperationResult((copyCoderSpec->TotalSize == item.Size) ?
NArchive::NExtract::NOperationResult::kOK:
NArchive::NExtract::NOperationResult::kDataError));
}
return S_OK;
}
UInt64 lastFolderIndex = ((UInt64)0 - 1);
for (i = 0; i < numItems; i++)
{
UInt32 index = allFilesMode ? i : indices[i];
int entryIndex = m_Database.Indices[index];
const CItem &item = m_Database.Items[entryIndex];
UInt64 sectionIndex = item.Section;
if (item.IsDirectory() || item.Size == 0)
continue;
if (sectionIndex == 0)
{
currentTotalSize += item.Size;
continue;
}
const CSectionInfo §ion = m_Database.Sections[(int)item.Section];
if (section.IsLzx())
{
const CLzxInfo &lzxInfo = section.Methods[0].LzxInfo;
UInt64 folderIndex = m_Database.GetFolder(index);
if (lastFolderIndex == folderIndex)
folderIndex++;
lastFolderIndex = m_Database.GetLastFolder(index);
for (; folderIndex <= lastFolderIndex; folderIndex++)
currentTotalSize += lzxInfo.GetFolderSize();
}
}
RINOK(extractCallback->SetTotal(currentTotalSize));
NCompress::NLzx::CDecoder *lzxDecoderSpec = 0;
CMyComPtr<ICompressCoder> lzxDecoder;
CChmFolderOutStream *chmFolderOutStream = 0;
CMyComPtr<ISequentialOutStream> outStream;
currentTotalSize = 0;
CRecordVector<bool> extractStatuses;
for (i = 0; i < numItems;)
{
RINOK(extractCallback->SetCompleted(¤tTotalSize));
UInt32 index = allFilesMode ? i : indices[i];
i++;
int entryIndex = m_Database.Indices[index];
const CItem &item = m_Database.Items[entryIndex];
UInt64 sectionIndex = item.Section;
Int32 askMode= testMode ?
NArchive::NExtract::NAskMode::kTest :
NArchive::NExtract::NAskMode::kExtract;
if (item.IsDirectory())
{
CMyComPtr<ISequentialOutStream> realOutStream;
RINOK(extractCallback->GetStream(index, &realOutStream, askMode));
RINOK(extractCallback->PrepareOperation(askMode));
realOutStream.Release();
RINOK(extractCallback->SetOperationResult(NArchive::NExtract::NOperationResult::kOK));
continue;
}
lps->InSize = currentTotalSize; // Change it
lps->OutSize = currentTotalSize;
if (item.Size == 0 || sectionIndex == 0)
{
CMyComPtr<ISequentialOutStream> realOutStream;
RINOK(extractCallback->GetStream(index, &realOutStream, askMode));
if (!testMode && (!realOutStream))
continue;
RINOK(extractCallback->PrepareOperation(askMode));
Int32 opRes = NArchive::NExtract::NOperationResult::kOK;
if (!testMode && item.Size != 0)
{
RINOK(m_Stream->Seek(m_Database.ContentOffset + item.Offset, STREAM_SEEK_SET, NULL));
streamSpec->Init(item.Size);
RINOK(copyCoder->Code(inStream, realOutStream, NULL, NULL, progress));
if (copyCoderSpec->TotalSize != item.Size)
opRes = NArchive::NExtract::NOperationResult::kDataError;
}
realOutStream.Release();
RINOK(extractCallback->SetOperationResult(opRes));
currentTotalSize += item.Size;
continue;
}
const CSectionInfo §ion = m_Database.Sections[(int)sectionIndex];
if (!section.IsLzx())
{
CMyComPtr<ISequentialOutStream> realOutStream;
RINOK(extractCallback->GetStream(index, &realOutStream, askMode));
if(!testMode && (!realOutStream))
continue;
RINOK(extractCallback->PrepareOperation(askMode));
RINOK(extractCallback->SetOperationResult(NArchive::NExtract::NOperationResult::kUnSupportedMethod));
continue;
}
const CLzxInfo &lzxInfo = section.Methods[0].LzxInfo;
if (chmFolderOutStream == 0)
{
chmFolderOutStream = new CChmFolderOutStream;
outStream = chmFolderOutStream;
}
chmFolderOutStream->Init(&m_Database, extractCallback, testMode);
if(lzxDecoderSpec == NULL)
{
lzxDecoderSpec = new NCompress::NLzx::CDecoder;
lzxDecoder = lzxDecoderSpec;
}
UInt64 folderIndex = m_Database.GetFolder(index);
UInt64 compressedPos = m_Database.ContentOffset + section.Offset;
UInt32 numDictBits = lzxInfo.GetNumDictBits();
RINOK(lzxDecoderSpec->SetParams(numDictBits));
const CItem *lastItem = &item;
extractStatuses.Clear();
extractStatuses.Add(true);
for (;; folderIndex++)
{
RINOK(extractCallback->SetCompleted(¤tTotalSize));
UInt64 startPos = lzxInfo.GetFolderPos(folderIndex);
UInt64 finishPos = lastItem->Offset + lastItem->Size;
UInt64 limitFolderIndex = lzxInfo.GetFolder(finishPos);
lastFolderIndex = m_Database.GetLastFolder(index);
UInt64 folderSize = lzxInfo.GetFolderSize();
UInt64 unPackSize = folderSize;
if (extractStatuses.IsEmpty())
chmFolderOutStream->m_StartIndex = index + 1;
else
chmFolderOutStream->m_StartIndex = index;
if (limitFolderIndex == folderIndex)
{
for (; i < numItems; i++)
{
UInt32 nextIndex = allFilesMode ? i : indices[i];
int entryIndex = m_Database.Indices[nextIndex];
const CItem &nextItem = m_Database.Items[entryIndex];
if (nextItem.Section != sectionIndex)
break;
UInt64 nextFolderIndex = m_Database.GetFolder(nextIndex);
if (nextFolderIndex != folderIndex)
break;
for (index++; index < nextIndex; index++)
extractStatuses.Add(false);
extractStatuses.Add(true);
index = nextIndex;
lastItem = &nextItem;
if (nextItem.Size != 0)
finishPos = nextItem.Offset + nextItem.Size;
lastFolderIndex = m_Database.GetLastFolder(index);
}
}
unPackSize = MyMin(finishPos - startPos, unPackSize);
chmFolderOutStream->m_FolderSize = folderSize;
chmFolderOutStream->m_PosInFolder = 0;
chmFolderOutStream->m_PosInSection = startPos;
chmFolderOutStream->m_ExtractStatuses = &extractStatuses;
chmFolderOutStream->m_NumFiles = extractStatuses.Size();
chmFolderOutStream->m_CurrentIndex = 0;
try
{
UInt64 startBlock = lzxInfo.GetBlockIndexFromFolderIndex(folderIndex);
const CResetTable &rt = lzxInfo.ResetTable;
UInt32 numBlocks = (UInt32)rt.GetNumBlocks(unPackSize);
for (UInt32 b = 0; b < numBlocks; b++)
{
UInt64 completedSize = currentTotalSize + chmFolderOutStream->m_PosInSection - startPos;
RINOK(extractCallback->SetCompleted(&completedSize));
UInt64 bCur = startBlock + b;
if (bCur >= rt.ResetOffsets.Size())
return E_FAIL;
UInt64 offset = rt.ResetOffsets[(int)bCur];
UInt64 compressedSize;
rt.GetCompressedSizeOfBlock(bCur, compressedSize);
UInt64 rem = finishPos - chmFolderOutStream->m_PosInSection;
if (rem > rt.BlockSize)
rem = rt.BlockSize;
RINOK(m_Stream->Seek(compressedPos + offset, STREAM_SEEK_SET, NULL));
streamSpec->SetStream(m_Stream);
streamSpec->Init(compressedSize);
lzxDecoderSpec->SetKeepHistory(b > 0);
HRESULT res = lzxDecoder->Code(inStream, outStream, NULL, &rem, NULL);
if (res != S_OK)
{
if (res != S_FALSE)
return res;
throw 1;
}
}
}
catch(...)
{
RINOK(chmFolderOutStream->FlushCorrupted(unPackSize));
}
currentTotalSize += folderSize;
if (folderIndex == lastFolderIndex)
break;
extractStatuses.Clear();
}
}
return S_OK;
COM_TRY_END
}
STDMETHODIMP CHandler::GetNumberOfItems(UInt32 *numItems)
{
*numItems = m_Database.NewFormat ? 1:
(m_Database.LowLevel ?
m_Database.Items.Size():
m_Database.Indices.Size());
return S_OK;
}
}}
|