4.44 beta

CPP/7zip/Common/LSBFEncoder.h

@@ -0,0 +1,51 @@
+// Stream/LSBFEncoder.h
+
+#ifndef __STREAM_LSBFENCODER_H
+#define __STREAM_LSBFENCODER_H
+
+#include "../IStream.h"
+#include "OutBuffer.h"
+
+namespace NStream {
+namespace NLSBF {
+
+class CEncoder
+{
+  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);
+  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