other-licenses/7zstub/src/7zip/Common/StreamObjects.cpp@97036ab72558 (annotated)
other-licenses/7zstub/src/7zip/Common/StreamObjects.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 | // StreamObjects.cpp |
| michael@0 | 2 | |
| michael@0 | 3 | #include "StdAfx.h" |
| michael@0 | 4 | |
| michael@0 | 5 | #include "StreamObjects.h" |
| michael@0 | 6 | #include "../../Common/Defs.h" |
| michael@0 | 7 | |
| michael@0 | 8 | |
| michael@0 | 9 | STDMETHODIMP CSequentialInStreamImp::Read(void *data, UInt32 size, UInt32 *processedSize) |
| michael@0 | 10 | { |
| michael@0 | 11 | UInt32 numBytesToRead = (UInt32)(MyMin(_pos + size, _size) - _pos); |
| michael@0 | 12 | memmove(data, _dataPointer + _pos, numBytesToRead); |
| michael@0 | 13 | _pos += numBytesToRead; |
| michael@0 | 14 | if(processedSize != NULL) |
| michael@0 | 15 | *processedSize = numBytesToRead; |
| michael@0 | 16 | return S_OK; |
| michael@0 | 17 | } |
| michael@0 | 18 | |
| michael@0 | 19 | |
| michael@0 | 20 | void CWriteBuffer::Write(const void *data, size_t size) |
| michael@0 | 21 | { |
| michael@0 | 22 | size_t newCapacity = _size + size; |
| michael@0 | 23 | _buffer.EnsureCapacity(newCapacity); |
| michael@0 | 24 | memmove(_buffer + _size, data, size); |
| michael@0 | 25 | _size += size; |
| michael@0 | 26 | } |
| michael@0 | 27 | |
| michael@0 | 28 | STDMETHODIMP CSequentialOutStreamImp::Write(const void *data, UInt32 size, UInt32 *processedSize) |
| michael@0 | 29 | { |
| michael@0 | 30 | _writeBuffer.Write(data, size); |
| michael@0 | 31 | if(processedSize != NULL) |
| michael@0 | 32 | *processedSize = size; |
| michael@0 | 33 | return S_OK; |
| michael@0 | 34 | } |
| michael@0 | 35 | |
| michael@0 | 36 | STDMETHODIMP CSequentialOutStreamImp2::Write(const void *data, UInt32 size, UInt32 *processedSize) |
| michael@0 | 37 | { |
| michael@0 | 38 | UInt32 newSize = size; |
| michael@0 | 39 | if (_pos + size > _size) |
| michael@0 | 40 | newSize = (UInt32)(_size - _pos); |
| michael@0 | 41 | memmove(_buffer + _pos, data, newSize); |
| michael@0 | 42 | if(processedSize != NULL) |
| michael@0 | 43 | *processedSize = newSize; |
| michael@0 | 44 | _pos += newSize; |
| michael@0 | 45 | if (newSize != size) |
| michael@0 | 46 | return E_FAIL; |
| michael@0 | 47 | return S_OK; |
| michael@0 | 48 | } |
| michael@0 | 49 | |
| michael@0 | 50 | STDMETHODIMP CSequentialInStreamSizeCount::Read(void *data, UInt32 size, UInt32 *processedSize) |
| michael@0 | 51 | { |
| michael@0 | 52 | UInt32 realProcessedSize; |
| michael@0 | 53 | HRESULT result = _stream->Read(data, size, &realProcessedSize); |
| michael@0 | 54 | _size += realProcessedSize; |
| michael@0 | 55 | if (processedSize != 0) |
| michael@0 | 56 | *processedSize = realProcessedSize; |
| michael@0 | 57 | return result; |
| michael@0 | 58 | } |
| michael@0 | 59 | |
| michael@0 | 60 | STDMETHODIMP CSequentialInStreamRollback::Read(void *data, UInt32 size, UInt32 *processedSize) |
| michael@0 | 61 | { |
| michael@0 | 62 | if (_currentPos != _currentSize) |
| michael@0 | 63 | { |
| michael@0 | 64 | size_t curSize = _currentSize - _currentPos; |
| michael@0 | 65 | if (size > curSize) |
| michael@0 | 66 | size = (UInt32)curSize; |
| michael@0 | 67 | memmove(data, _buffer + _currentPos, size); |
| michael@0 | 68 | _currentPos += size; |
| michael@0 | 69 | if (processedSize != 0) |
| michael@0 | 70 | *processedSize = size; |
| michael@0 | 71 | return S_OK; |
| michael@0 | 72 | } |
| michael@0 | 73 | UInt32 realProcessedSize; |
| michael@0 | 74 | if (size > _bufferSize) |
| michael@0 | 75 | size = (UInt32)_bufferSize; |
| michael@0 | 76 | HRESULT result = _stream->Read(_buffer, size, &realProcessedSize); |
| michael@0 | 77 | memmove(data, _buffer, realProcessedSize); |
| michael@0 | 78 | _size += realProcessedSize; |
| michael@0 | 79 | _currentSize = realProcessedSize; |
| michael@0 | 80 | _currentPos = realProcessedSize; |
| michael@0 | 81 | if (processedSize != 0) |
| michael@0 | 82 | *processedSize = realProcessedSize; |
| michael@0 | 83 | return result; |
| michael@0 | 84 | } |
| michael@0 | 85 | |
| michael@0 | 86 | HRESULT CSequentialInStreamRollback::Rollback(size_t rollbackSize) |
| michael@0 | 87 | { |
| michael@0 | 88 | if (rollbackSize > _currentPos) |
| michael@0 | 89 | return E_INVALIDARG; |
| michael@0 | 90 | _currentPos -= rollbackSize; |
| michael@0 | 91 | return S_OK; |
| michael@0 | 92 | } |
| michael@0 | 93 | |
| michael@0 | 94 | STDMETHODIMP CSequentialOutStreamSizeCount::Write(const void *data, UInt32 size, UInt32 *processedSize) |
| michael@0 | 95 | { |
| michael@0 | 96 | UInt32 realProcessedSize; |
| michael@0 | 97 | HRESULT result = _stream->Write(data, size, &realProcessedSize); |
| michael@0 | 98 | _size += realProcessedSize; |
| michael@0 | 99 | if (processedSize != 0) |
| michael@0 | 100 | *processedSize = realProcessedSize; |
| michael@0 | 101 | return result; |
| michael@0 | 102 | } |
