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Annotation of elwix/tools/oldlzma/SRC/7zip/Compress/LZ/HashChain/HC.h, revision 1.1.1.1

1.1       misho       1: // HC.h
                      2: 
                      3: #include "../LZInWindow.h"
                      4: #include "../IMatchFinder.h"
                      5:  
                      6: namespace HC_NAMESPACE {
                      7: 
                      8: typedef UInt32 CIndex;
                      9: const UInt32 kMaxValForNormalize = (UInt32(1) << 31) - 1;
                     10: 
                     11: class CMatchFinderHC: 
                     12:   public IMatchFinder,
                     13:   public IMatchFinderSetCallback,
                     14:   public CLZInWindow,
                     15:   public CMyUnknownImp
                     16: {
                     17:   UInt32 _cyclicBufferPos;
                     18:   UInt32 _cyclicBufferSize; // it must be historySize + 1
                     19:   UInt32 _matchMaxLen;
                     20:   CIndex *_hash;
                     21:   UInt32 _cutValue;
                     22: 
                     23:   CMyComPtr<IMatchFinderCallback> m_Callback;
                     24: 
                     25:   void Normalize();
                     26:   void FreeThisClassMemory();
                     27:   void FreeMemory();
                     28: 
                     29:   MY_UNKNOWN_IMP1(IMatchFinderSetCallback)
                     30: 
                     31:   STDMETHOD(Init)(ISequentialInStream *inStream);
                     32:   STDMETHOD_(void, ReleaseStream)();
                     33:   STDMETHOD(MovePos)();
                     34:   STDMETHOD_(Byte, GetIndexByte)(Int32 index);
                     35:   STDMETHOD_(UInt32, GetMatchLen)(Int32 index, UInt32 back, UInt32 limit);
                     36:   STDMETHOD_(UInt32, GetNumAvailableBytes)();
                     37:   STDMETHOD_(const Byte *, GetPointerToCurrentPos)();
                     38:   STDMETHOD(Create)(UInt32 historySize, UInt32 keepAddBufferBefore, 
                     39:       UInt32 matchMaxLen, UInt32 keepAddBufferAfter);
                     40:   STDMETHOD_(UInt32, GetLongestMatch)(UInt32 *distances);
                     41:   STDMETHOD_(void, DummyLongestMatch)();
                     42: 
                     43:   // IMatchFinderSetCallback
                     44:   STDMETHOD(SetCallback)(IMatchFinderCallback *callback);
                     45: 
                     46:   virtual void BeforeMoveBlock();
                     47:   virtual void AfterMoveBlock();
                     48: 
                     49: public:
                     50:   CMatchFinderHC();
                     51:   virtual ~CMatchFinderHC();
                     52:   void SetCutValue(UInt32 cutValue) { _cutValue = cutValue; }
                     53: };
                     54: 
                     55: }