diff options
Diffstat (limited to 'installerbuilder/libinstaller/3rdparty/p7zip_9.04/unix/CPP/7zip/Compress/BitlEncoder.h')
-rw-r--r-- | installerbuilder/libinstaller/3rdparty/p7zip_9.04/unix/CPP/7zip/Compress/BitlEncoder.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/installerbuilder/libinstaller/3rdparty/p7zip_9.04/unix/CPP/7zip/Compress/BitlEncoder.h b/installerbuilder/libinstaller/3rdparty/p7zip_9.04/unix/CPP/7zip/Compress/BitlEncoder.h new file mode 100644 index 000000000..02f5a9c65 --- /dev/null +++ b/installerbuilder/libinstaller/3rdparty/p7zip_9.04/unix/CPP/7zip/Compress/BitlEncoder.h @@ -0,0 +1,60 @@ +// BitlEncoder.h -- the Least Significant Bit of byte is First + +#ifndef __BITL_ENCODER_H +#define __BITL_ENCODER_H + +#include "../Common/OutBuffer.h" + +class CBitlEncoder +{ + COutBuffer m_Stream; + int m_BitPos; + Byte m_CurByte; +public: + bool Create(UInt32 bufferSize) { return m_Stream.Create(bufferSize); } + void SetStream(ISequentialOutStream *outStream) { m_Stream.SetStream(outStream); } + void ReleaseStream() { m_Stream.ReleaseStream(); } + void Init() + { + m_Stream.Init(); + m_BitPos = 8; + m_CurByte = 0; + } + HRESULT Flush() + { + FlushByte(); + return m_Stream.Flush(); + } + + void FlushByte() + { + if(m_BitPos < 8) + m_Stream.WriteByte(m_CurByte); + m_BitPos = 8; + m_CurByte = 0; + } + + void WriteBits(UInt32 value, int numBits) + { + while(numBits > 0) + { + if (numBits < m_BitPos) + { + m_CurByte |= (value & ((1 << numBits) - 1)) << (8 - m_BitPos); + m_BitPos -= numBits; + return; + } + numBits -= m_BitPos; + m_Stream.WriteByte((Byte)(m_CurByte | (value << (8 - m_BitPos)))); + value >>= m_BitPos; + m_BitPos = 8; + m_CurByte = 0; + } + } + UInt32 GetBitPosition() const { return (8 - m_BitPos); } + UInt64 GetProcessedSize() const { + return m_Stream.GetProcessedSize() + (8 - m_BitPos + 7) /8; } + void WriteByte(Byte b) { m_Stream.WriteByte(b);} +}; + +#endif |