other-licenses/7zstub/src/7zip/Compress/LZ/LZOutWindow.h@97036ab72558 (annotated)
other-licenses/7zstub/src/7zip/Compress/LZ/LZOutWindow.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 | // LZOutWindow.h |
| michael@0 | 2 | |
| michael@0 | 3 | #ifndef __LZ_OUT_WINDOW_H |
| michael@0 | 4 | #define __LZ_OUT_WINDOW_H |
| michael@0 | 5 | |
| michael@0 | 6 | #include "../../IStream.h" |
| michael@0 | 7 | #include "../../Common/OutBuffer.h" |
| michael@0 | 8 | |
| michael@0 | 9 | #ifndef _NO_EXCEPTIONS |
| michael@0 | 10 | typedef COutBufferException CLZOutWindowException; |
| michael@0 | 11 | #endif |
| michael@0 | 12 | |
| michael@0 | 13 | class CLZOutWindow: public COutBuffer |
| michael@0 | 14 | { |
| michael@0 | 15 | public: |
| michael@0 | 16 | void Init(bool solid = false); |
| michael@0 | 17 | |
| michael@0 | 18 | // distance >= 0, len > 0, |
| michael@0 | 19 | bool CopyBlock(UInt32 distance, UInt32 len) |
| michael@0 | 20 | { |
| michael@0 | 21 | UInt32 pos = _pos - distance - 1; |
| michael@0 | 22 | if (distance >= _pos) |
| michael@0 | 23 | { |
| michael@0 | 24 | if (!_overDict || distance >= _bufferSize) |
| michael@0 | 25 | return false; |
| michael@0 | 26 | pos += _bufferSize; |
| michael@0 | 27 | } |
| michael@0 | 28 | do |
| michael@0 | 29 | { |
| michael@0 | 30 | if (pos == _bufferSize) |
| michael@0 | 31 | pos = 0; |
| michael@0 | 32 | _buffer[_pos++] = _buffer[pos++]; |
| michael@0 | 33 | if (_pos == _limitPos) |
| michael@0 | 34 | FlushWithCheck(); |
| michael@0 | 35 | } |
| michael@0 | 36 | while(--len != 0); |
| michael@0 | 37 | return true; |
| michael@0 | 38 | } |
| michael@0 | 39 | |
| michael@0 | 40 | void PutByte(Byte b) |
| michael@0 | 41 | { |
| michael@0 | 42 | _buffer[_pos++] = b; |
| michael@0 | 43 | if (_pos == _limitPos) |
| michael@0 | 44 | FlushWithCheck(); |
| michael@0 | 45 | } |
| michael@0 | 46 | |
| michael@0 | 47 | Byte GetByte(UInt32 distance) const |
| michael@0 | 48 | { |
| michael@0 | 49 | UInt32 pos = _pos - distance - 1; |
| michael@0 | 50 | if (pos >= _bufferSize) |
| michael@0 | 51 | pos += _bufferSize; |
| michael@0 | 52 | return _buffer[pos]; |
| michael@0 | 53 | } |
| michael@0 | 54 | }; |
| michael@0 | 55 | |
| michael@0 | 56 | #endif |
