other-licenses/7zstub/src/7zip/Common/InBuffer.h@97036ab72558 (annotated)
other-licenses/7zstub/src/7zip/Common/InBuffer.h
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 | // InBuffer.h |
| michael@0 | 2 | |
| michael@0 | 3 | #ifndef __INBUFFER_H |
| michael@0 | 4 | #define __INBUFFER_H |
| michael@0 | 5 | |
| michael@0 | 6 | #include "../IStream.h" |
| michael@0 | 7 | #include "../../Common/MyCom.h" |
| michael@0 | 8 | |
| michael@0 | 9 | #ifndef _NO_EXCEPTIONS |
| michael@0 | 10 | class CInBufferException |
| michael@0 | 11 | { |
| michael@0 | 12 | public: |
| michael@0 | 13 | HRESULT ErrorCode; |
| michael@0 | 14 | CInBufferException(HRESULT errorCode): ErrorCode(errorCode) {} |
| michael@0 | 15 | }; |
| michael@0 | 16 | #endif |
| michael@0 | 17 | |
| michael@0 | 18 | class CInBuffer |
| michael@0 | 19 | { |
| michael@0 | 20 | Byte *_buffer; |
| michael@0 | 21 | Byte *_bufferLimit; |
| michael@0 | 22 | Byte *_bufferBase; |
| michael@0 | 23 | CMyComPtr<ISequentialInStream> _stream; |
| michael@0 | 24 | UInt64 _processedSize; |
| michael@0 | 25 | UInt32 _bufferSize; |
| michael@0 | 26 | bool _wasFinished; |
| michael@0 | 27 | |
| michael@0 | 28 | bool ReadBlock(); |
| michael@0 | 29 | Byte ReadBlock2(); |
| michael@0 | 30 | |
| michael@0 | 31 | public: |
| michael@0 | 32 | #ifdef _NO_EXCEPTIONS |
| michael@0 | 33 | HRESULT ErrorCode; |
| michael@0 | 34 | #endif |
| michael@0 | 35 | |
| michael@0 | 36 | CInBuffer(); |
| michael@0 | 37 | ~CInBuffer() { Free(); } |
| michael@0 | 38 | |
| michael@0 | 39 | bool Create(UInt32 bufferSize); |
| michael@0 | 40 | void Free(); |
| michael@0 | 41 | |
| michael@0 | 42 | void SetStream(ISequentialInStream *stream); |
| michael@0 | 43 | void Init(); |
| michael@0 | 44 | void ReleaseStream() { _stream.Release(); } |
| michael@0 | 45 | |
| michael@0 | 46 | bool ReadByte(Byte &b) |
| michael@0 | 47 | { |
| michael@0 | 48 | if(_buffer >= _bufferLimit) |
| michael@0 | 49 | if(!ReadBlock()) |
| michael@0 | 50 | return false; |
| michael@0 | 51 | b = *_buffer++; |
| michael@0 | 52 | return true; |
| michael@0 | 53 | } |
| michael@0 | 54 | Byte ReadByte() |
| michael@0 | 55 | { |
| michael@0 | 56 | if(_buffer >= _bufferLimit) |
| michael@0 | 57 | return ReadBlock2(); |
| michael@0 | 58 | return *_buffer++; |
| michael@0 | 59 | } |
| michael@0 | 60 | void ReadBytes(void *data, UInt32 size, UInt32 &processedSize) |
| michael@0 | 61 | { |
| michael@0 | 62 | for(processedSize = 0; processedSize < size; processedSize++) |
| michael@0 | 63 | if (!ReadByte(((Byte *)data)[processedSize])) |
| michael@0 | 64 | return; |
| michael@0 | 65 | } |
| michael@0 | 66 | bool ReadBytes(void *data, UInt32 size) |
| michael@0 | 67 | { |
| michael@0 | 68 | UInt32 processedSize; |
| michael@0 | 69 | ReadBytes(data, size, processedSize); |
| michael@0 | 70 | return (processedSize == size); |
| michael@0 | 71 | } |
| michael@0 | 72 | UInt64 GetProcessedSize() const { return _processedSize + (_buffer - _bufferBase); } |
| michael@0 | 73 | bool WasFinished() const { return _wasFinished; } |
| michael@0 | 74 | }; |
| michael@0 | 75 | |
| michael@0 | 76 | #endif |
