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comparison: other-licenses/7zstub/src/7zip/Common/OutBuffer.cpp
other-licenses/7zstub/src/7zip/Common/OutBuffer.cpp
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:88a851e17201 |
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| 1 // OutByte.cpp | |
| 2 | |
| 3 #include "StdAfx.h" | |
| 4 | |
| 5 #include "OutBuffer.h" | |
| 6 | |
| 7 #include "../../Common/Alloc.h" | |
| 8 | |
| 9 bool COutBuffer::Create(UInt32 bufferSize) | |
| 10 { | |
| 11 const UInt32 kMinBlockSize = 1; | |
| 12 if (bufferSize < kMinBlockSize) | |
| 13 bufferSize = kMinBlockSize; | |
| 14 if (_buffer != 0 && _bufferSize == bufferSize) | |
| 15 return true; | |
| 16 Free(); | |
| 17 _bufferSize = bufferSize; | |
| 18 _buffer = (Byte *)::MidAlloc(bufferSize); | |
| 19 return (_buffer != 0); | |
| 20 } | |
| 21 | |
| 22 void COutBuffer::Free() | |
| 23 { | |
| 24 ::MidFree(_buffer); | |
| 25 _buffer = 0; | |
| 26 } | |
| 27 | |
| 28 void COutBuffer::SetStream(ISequentialOutStream *stream) | |
| 29 { | |
| 30 _stream = stream; | |
| 31 } | |
| 32 | |
| 33 void COutBuffer::Init() | |
| 34 { | |
| 35 _streamPos = 0; | |
| 36 _limitPos = _bufferSize; | |
| 37 _pos = 0; | |
| 38 _processedSize = 0; | |
| 39 _overDict = false; | |
| 40 #ifdef _NO_EXCEPTIONS | |
| 41 ErrorCode = S_OK; | |
| 42 #endif | |
| 43 } | |
| 44 | |
| 45 UInt64 COutBuffer::GetProcessedSize() const | |
| 46 { | |
| 47 UInt64 res = _processedSize + _pos - _streamPos; | |
| 48 if (_streamPos > _pos) | |
| 49 res += _bufferSize; | |
| 50 return res; | |
| 51 } | |
| 52 | |
| 53 | |
| 54 HRESULT COutBuffer::FlushPart() | |
| 55 { | |
| 56 // _streamPos < _bufferSize | |
| 57 UInt32 size = (_streamPos >= _pos) ? (_bufferSize - _streamPos) : (_pos - _streamPos); | |
| 58 HRESULT result = S_OK; | |
| 59 #ifdef _NO_EXCEPTIONS | |
| 60 result = ErrorCode; | |
| 61 #endif | |
| 62 if (_buffer2 != 0) | |
| 63 { | |
| 64 memmove(_buffer2, _buffer + _streamPos, size); | |
| 65 _buffer2 += size; | |
| 66 } | |
| 67 | |
| 68 if (_stream != 0 | |
| 69 #ifdef _NO_EXCEPTIONS | |
| 70 && (ErrorCode == S_OK) | |
| 71 #endif | |
| 72 ) | |
| 73 { | |
| 74 UInt32 processedSize = 0; | |
| 75 result = _stream->Write(_buffer + _streamPos, size, &processedSize); | |
| 76 size = processedSize; | |
| 77 } | |
| 78 _streamPos += size; | |
| 79 if (_streamPos == _bufferSize) | |
| 80 _streamPos = 0; | |
| 81 if (_pos == _bufferSize) | |
| 82 { | |
| 83 _overDict = true; | |
| 84 _pos = 0; | |
| 85 } | |
| 86 _limitPos = (_streamPos > _pos) ? _streamPos : _bufferSize; | |
| 87 _processedSize += size; | |
| 88 return result; | |
| 89 } | |
| 90 | |
| 91 HRESULT COutBuffer::Flush() | |
| 92 { | |
| 93 #ifdef _NO_EXCEPTIONS | |
| 94 if (ErrorCode != S_OK) | |
| 95 return ErrorCode; | |
| 96 #endif | |
| 97 | |
| 98 while(_streamPos != _pos) | |
| 99 { | |
| 100 HRESULT result = FlushPart(); | |
| 101 if (result != S_OK) | |
| 102 return result; | |
| 103 } | |
| 104 return S_OK; | |
| 105 } | |
| 106 | |
| 107 void COutBuffer::FlushWithCheck() | |
| 108 { | |
| 109 HRESULT result = FlushPart(); | |
| 110 #ifdef _NO_EXCEPTIONS | |
| 111 ErrorCode = result; | |
| 112 #else | |
| 113 if (result != S_OK) | |
| 114 throw COutBufferException(result); | |
| 115 #endif | |
| 116 } |
