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CryNetwork/CompressionHelper.h

@@ -0,0 +1,39 @@
+#ifndef _COMPRESSIONHELPER_H_
+#define _COMPRESSIONHELPER_H_
+
+#if _MSC_VER > 1000
+#pragma once
+#endif // _MSC_VER > 1000
+
+#include "ICompressionHelper.h"				// ICompressionHelper
+#include "StaticCharCompressor.h"			// CStaticCharCompressor
+
+//#define GATHER_CHARSTATISTICS					// only needed during development - to build up the compression table
+
+
+class CCompressionHelper :public ICompressionHelper
+{
+public:
+	//! constructor
+	CCompressionHelper();
+	//! destructor
+	virtual ~CCompressionHelper();
+
+	// interface ICompressionHelper ---------------------------------------------
+
+	virtual bool Write( CStream &outStream, const unsigned char inChar );
+	virtual bool Read( CStream &inStream, unsigned char &outChar );
+	virtual bool Write( CStream &outStream, const char *inszString );
+	virtual bool Read( CStream &inStream, char *outszString, const DWORD indwStringSize );
+
+private: // -------------------------------------------------------------------
+
+	CStaticCharCompressor				m_CharCompressor;							//!< based on static Huffman compresson
+#ifdef GATHER_CHARSTATISTICS
+	DWORD												m_dwCharStats[256];						//!<
+	DWORD												m_dwWriteBitsCompressed;			//!<
+	DWORD												m_dwWriteBitsUncompressed;		//!<
+#endif
+};
+
+#endif //_COMPRESSIONHELPER_H_