diff options
Diffstat (limited to 'src/libs/3rdparty/7zip/win/CPP/7zip/Common/InBuffer.h')
-rw-r--r-- | src/libs/3rdparty/7zip/win/CPP/7zip/Common/InBuffer.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/src/libs/3rdparty/7zip/win/CPP/7zip/Common/InBuffer.h b/src/libs/3rdparty/7zip/win/CPP/7zip/Common/InBuffer.h new file mode 100644 index 000000000..dd3c66808 --- /dev/null +++ b/src/libs/3rdparty/7zip/win/CPP/7zip/Common/InBuffer.h @@ -0,0 +1,90 @@ +// InBuffer.h + +#ifndef __IN_BUFFER_H +#define __IN_BUFFER_H + +#include "../../Common/MyException.h" +#include "../IStream.h" + +#ifndef _NO_EXCEPTIONS +struct CInBufferException: public CSystemException +{ + CInBufferException(HRESULT errorCode): CSystemException(errorCode) {} +}; +#endif + +class CInBufferBase +{ +protected: + Byte *_buf; + Byte *_bufLim; + Byte *_bufBase; + + ISequentialInStream *_stream; + UInt64 _processedSize; + size_t _bufSize; // actually it's number of Bytes for next read. The buf can be larger + // only up to 32-bits values now are supported! + bool _wasFinished; + + bool ReadBlock(); + bool ReadByte_FromNewBlock(Byte &b); + Byte ReadByte_FromNewBlock(); + +public: + #ifdef _NO_EXCEPTIONS + HRESULT ErrorCode; + #endif + UInt32 NumExtraBytes; + + CInBufferBase() throw(); + + UInt64 GetStreamSize() const { return _processedSize + (_buf - _bufBase); } + UInt64 GetProcessedSize() const { return _processedSize + NumExtraBytes + (_buf - _bufBase); } + bool WasFinished() const { return _wasFinished; } + + void SetStream(ISequentialInStream *stream) { _stream = stream; } + + void SetBuf(Byte *buf, size_t bufSize, size_t end, size_t pos) + { + _bufBase = buf; + _bufSize = bufSize; + _processedSize = 0; + _buf = buf + pos; + _bufLim = buf + end; + _wasFinished = false; + #ifdef _NO_EXCEPTIONS + ErrorCode = S_OK; + #endif + NumExtraBytes = 0; + } + + void Init() throw(); + + bool ReadByte(Byte &b) + { + if (_buf >= _bufLim) + return ReadByte_FromNewBlock(b); + b = *_buf++; + return true; + } + + Byte ReadByte() + { + if (_buf >= _bufLim) + return ReadByte_FromNewBlock(); + return *_buf++; + } + + size_t ReadBytes(Byte *buf, size_t size); + size_t Skip(size_t size); +}; + +class CInBuffer: public CInBufferBase +{ +public: + ~CInBuffer() { Free(); } + bool Create(size_t bufSize) throw(); // only up to 32-bits values now are supported! + void Free() throw(); +}; + +#endif |