BinTree.h
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BinTree.h
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	// BinTree.h

	#include "../LZInWindow.h"
	#include "../IMatchFinder.h"

	namespace BT_NAMESPACE {

	typedef UInt32 CIndex;
	const UInt32 kMaxValForNormalize = (UInt32(1) << 31) - 1;

	class CMatchFinder:
	public IMatchFinder,
	public CLZInWindow,
	public CMyUnknownImp,
	public IMatchFinderSetNumPasses
	{
	UInt32 _cyclicBufferPos;
	UInt32 _cyclicBufferSize; // it must be historySize + 1
	UInt32 _matchMaxLen;
	CIndex *_hash;
	CIndex *_son;
	UInt32 _hashMask;
	UInt32 _cutValue;
	UInt32 _hashSizeSum;

	void Normalize();
	void FreeThisClassMemory();
	void FreeMemory();

	MY_UNKNOWN_IMP

	STDMETHOD(SetStream)(ISequentialInStream *inStream);
	STDMETHOD_(void, ReleaseStream)();
	STDMETHOD(Init)();
	HRESULT MovePos();
	STDMETHOD_(Byte, GetIndexByte)(Int32 index);
	STDMETHOD_(UInt32, GetMatchLen)(Int32 index, UInt32 back, UInt32 limit);
	STDMETHOD_(UInt32, GetNumAvailableBytes)();
	STDMETHOD_(const Byte *, GetPointerToCurrentPos)();
	STDMETHOD_(Int32, NeedChangeBufferPos)(UInt32 numCheckBytes);
	STDMETHOD_(void, ChangeBufferPos)();

	STDMETHOD(Create)(UInt32 historySize, UInt32 keepAddBufferBefore,
	UInt32 matchMaxLen, UInt32 keepAddBufferAfter);
	STDMETHOD(GetMatches)(UInt32 *distances);
	STDMETHOD(Skip)(UInt32 num);

	public:
	CMatchFinder();
	virtual ~CMatchFinder();
	virtual void SetNumPasses(UInt32 numPasses) { _cutValue = numPasses; }
	};

	}