other-licenses/7zstub/src/7zip/Archive/7z/7zFolderOutStream.cpp@97036ab72558 (annotated)
other-licenses/7zstub/src/7zip/Archive/7z/7zFolderOutStream.cpp
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | // 7zFolderOutStream.cpp |
| michael@0 | 2 | |
| michael@0 | 3 | #include "StdAfx.h" |
| michael@0 | 4 | |
| michael@0 | 5 | #include "7zFolderOutStream.h" |
| michael@0 | 6 | |
| michael@0 | 7 | namespace NArchive { |
| michael@0 | 8 | namespace N7z { |
| michael@0 | 9 | |
| michael@0 | 10 | CFolderOutStream::CFolderOutStream() |
| michael@0 | 11 | { |
| michael@0 | 12 | _outStreamWithHashSpec = new COutStreamWithCRC; |
| michael@0 | 13 | _outStreamWithHash = _outStreamWithHashSpec; |
| michael@0 | 14 | } |
| michael@0 | 15 | |
| michael@0 | 16 | HRESULT CFolderOutStream::Init( |
| michael@0 | 17 | const CArchiveDatabaseEx *archiveDatabase, |
| michael@0 | 18 | UInt32 ref2Offset, |
| michael@0 | 19 | UInt32 startIndex, |
| michael@0 | 20 | const CBoolVector *extractStatuses, |
| michael@0 | 21 | IArchiveExtractCallback *extractCallback, |
| michael@0 | 22 | bool testMode) |
| michael@0 | 23 | { |
| michael@0 | 24 | _archiveDatabase = archiveDatabase; |
| michael@0 | 25 | _ref2Offset = ref2Offset; |
| michael@0 | 26 | _startIndex = startIndex; |
| michael@0 | 27 | |
| michael@0 | 28 | _extractStatuses = extractStatuses; |
| michael@0 | 29 | _extractCallback = extractCallback; |
| michael@0 | 30 | _testMode = testMode; |
| michael@0 | 31 | |
| michael@0 | 32 | _currentIndex = 0; |
| michael@0 | 33 | _fileIsOpen = false; |
| michael@0 | 34 | return WriteEmptyFiles(); |
| michael@0 | 35 | } |
| michael@0 | 36 | |
| michael@0 | 37 | HRESULT CFolderOutStream::OpenFile() |
| michael@0 | 38 | { |
| michael@0 | 39 | Int32 askMode; |
| michael@0 | 40 | if((*_extractStatuses)[_currentIndex]) |
| michael@0 | 41 | askMode = _testMode ? |
| michael@0 | 42 | NArchive::NExtract::NAskMode::kTest : |
| michael@0 | 43 | NArchive::NExtract::NAskMode::kExtract; |
| michael@0 | 44 | else |
| michael@0 | 45 | askMode = NArchive::NExtract::NAskMode::kSkip; |
| michael@0 | 46 | CMyComPtr<ISequentialOutStream> realOutStream; |
| michael@0 | 47 | |
| michael@0 | 48 | UInt32 index = _startIndex + _currentIndex; |
| michael@0 | 49 | RINOK(_extractCallback->GetStream(_ref2Offset + index, &realOutStream, askMode)); |
| michael@0 | 50 | |
| michael@0 | 51 | _outStreamWithHashSpec->Init(realOutStream); |
| michael@0 | 52 | if (askMode == NArchive::NExtract::NAskMode::kExtract && |
| michael@0 | 53 | (!realOutStream)) |
| michael@0 | 54 | { |
| michael@0 | 55 | const CFileItem &fileInfo = _archiveDatabase->Files[index]; |
| michael@0 | 56 | if (!fileInfo.IsAnti && !fileInfo.IsDirectory) |
| michael@0 | 57 | askMode = NArchive::NExtract::NAskMode::kSkip; |
| michael@0 | 58 | } |
| michael@0 | 59 | return _extractCallback->PrepareOperation(askMode); |
| michael@0 | 60 | } |
| michael@0 | 61 | |
| michael@0 | 62 | HRESULT CFolderOutStream::WriteEmptyFiles() |
| michael@0 | 63 | { |
| michael@0 | 64 | for(;_currentIndex < _extractStatuses->Size(); _currentIndex++) |
| michael@0 | 65 | { |
| michael@0 | 66 | UInt32 index = _startIndex + _currentIndex; |
| michael@0 | 67 | const CFileItem &fileInfo = _archiveDatabase->Files[index]; |
| michael@0 | 68 | if (!fileInfo.IsAnti && !fileInfo.IsDirectory && fileInfo.UnPackSize != 0) |
| michael@0 | 69 | return S_OK; |
| michael@0 | 70 | RINOK(OpenFile()); |
| michael@0 | 71 | RINOK(_extractCallback->SetOperationResult( |
| michael@0 | 72 | NArchive::NExtract::NOperationResult::kOK)); |
| michael@0 | 73 | _outStreamWithHashSpec->ReleaseStream(); |
| michael@0 | 74 | } |
| michael@0 | 75 | return S_OK; |
| michael@0 | 76 | } |
| michael@0 | 77 | |
| michael@0 | 78 | STDMETHODIMP CFolderOutStream::Write(const void *data, |
| michael@0 | 79 | UInt32 size, UInt32 *processedSize) |
| michael@0 | 80 | { |
| michael@0 | 81 | UInt32 realProcessedSize = 0; |
| michael@0 | 82 | while(_currentIndex < _extractStatuses->Size()) |
| michael@0 | 83 | { |
| michael@0 | 84 | if (_fileIsOpen) |
| michael@0 | 85 | { |
| michael@0 | 86 | UInt32 index = _startIndex + _currentIndex; |
| michael@0 | 87 | const CFileItem &fileInfo = _archiveDatabase->Files[index]; |
| michael@0 | 88 | UInt64 fileSize = fileInfo.UnPackSize; |
| michael@0 | 89 | |
| michael@0 | 90 | UInt32 numBytesToWrite = (UInt32)MyMin(fileSize - _filePos, |
| michael@0 | 91 | UInt64(size - realProcessedSize)); |
| michael@0 | 92 | |
| michael@0 | 93 | UInt32 processedSizeLocal; |
| michael@0 | 94 | RINOK(_outStreamWithHash->Write((const Byte *)data + realProcessedSize, |
| michael@0 | 95 | numBytesToWrite, &processedSizeLocal)); |
| michael@0 | 96 | |
| michael@0 | 97 | _filePos += processedSizeLocal; |
| michael@0 | 98 | realProcessedSize += processedSizeLocal; |
| michael@0 | 99 | if (_filePos == fileSize) |
| michael@0 | 100 | { |
| michael@0 | 101 | bool digestsAreEqual; |
| michael@0 | 102 | if (fileInfo.IsFileCRCDefined) |
| michael@0 | 103 | digestsAreEqual = fileInfo.FileCRC == _outStreamWithHashSpec->GetCRC(); |
| michael@0 | 104 | else |
| michael@0 | 105 | digestsAreEqual = true; |
| michael@0 | 106 | |
| michael@0 | 107 | RINOK(_extractCallback->SetOperationResult( |
| michael@0 | 108 | digestsAreEqual ? |
| michael@0 | 109 | NArchive::NExtract::NOperationResult::kOK : |
| michael@0 | 110 | NArchive::NExtract::NOperationResult::kCRCError)); |
| michael@0 | 111 | _outStreamWithHashSpec->ReleaseStream(); |
| michael@0 | 112 | _fileIsOpen = false; |
| michael@0 | 113 | _currentIndex++; |
| michael@0 | 114 | } |
| michael@0 | 115 | if (realProcessedSize == size) |
| michael@0 | 116 | { |
| michael@0 | 117 | if (processedSize != NULL) |
| michael@0 | 118 | *processedSize = realProcessedSize; |
| michael@0 | 119 | return WriteEmptyFiles(); |
| michael@0 | 120 | } |
| michael@0 | 121 | } |
| michael@0 | 122 | else |
| michael@0 | 123 | { |
| michael@0 | 124 | RINOK(OpenFile()); |
| michael@0 | 125 | _fileIsOpen = true; |
| michael@0 | 126 | _filePos = 0; |
| michael@0 | 127 | } |
| michael@0 | 128 | } |
| michael@0 | 129 | if (processedSize != NULL) |
| michael@0 | 130 | *processedSize = size; |
| michael@0 | 131 | return S_OK; |
| michael@0 | 132 | } |
| michael@0 | 133 | |
| michael@0 | 134 | HRESULT CFolderOutStream::FlushCorrupted(Int32 resultEOperationResult) |
| michael@0 | 135 | { |
| michael@0 | 136 | while(_currentIndex < _extractStatuses->Size()) |
| michael@0 | 137 | { |
| michael@0 | 138 | if (_fileIsOpen) |
| michael@0 | 139 | { |
| michael@0 | 140 | RINOK(_extractCallback->SetOperationResult(resultEOperationResult)); |
| michael@0 | 141 | _outStreamWithHashSpec->ReleaseStream(); |
| michael@0 | 142 | _fileIsOpen = false; |
| michael@0 | 143 | _currentIndex++; |
| michael@0 | 144 | } |
| michael@0 | 145 | else |
| michael@0 | 146 | { |
| michael@0 | 147 | RINOK(OpenFile()); |
| michael@0 | 148 | _fileIsOpen = true; |
| michael@0 | 149 | } |
| michael@0 | 150 | } |
| michael@0 | 151 | return S_OK; |
| michael@0 | 152 | } |
| michael@0 | 153 | |
| michael@0 | 154 | HRESULT CFolderOutStream::WasWritingFinished() |
| michael@0 | 155 | { |
| michael@0 | 156 | if (_currentIndex == _extractStatuses->Size()) |
| michael@0 | 157 | return S_OK; |
| michael@0 | 158 | return E_FAIL; |
| michael@0 | 159 | } |
| michael@0 | 160 | |
| michael@0 | 161 | }} |
