include/tdbutil/cstringHashKey.h

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/*********************************************************************
** Copyright (c) 2004 MAK Technologies, Inc.
** All rights reserved.
*********************************************************************/
/*********************************************************************
** $RCSfile: cstringHashKey.h,v $ $Revision: 1.3 $ $State: Exp $
*********************************************************************/

#ifndef cstringHashKey_H_
#define cstringHashKey_H_

#include "tdbutil/tdbUtilDefines.h"
#include <vlutil/vlString.h>
#include <vlutil/vlHashKeys.h>
#include <vlutil/vlHashlist.h>


//
// The DtCStringHashKey class is a string hash key not based upon DtString.
// This is useful for longterm storage because this may consume less memory 
// as DtStrings always take 64 bytes.
//
class DT_DLL_tdbutil DtCStringHashKey : public DtBaseHashKey
{
public:

   // empty constructor -- generally should not be called
   DtCStringHashKey();

   // default constructor
   DtCStringHashKey(const DtString& str);

   // alternate constructor
   DtCStringHashKey(const char* str);

   // destructor
   virtual ~DtCStringHashKey();

   // copy constructor
   DtCStringHashKey(const DtCStringHashKey& orig);

   // assignment operator
   DtCStringHashKey& operator=(const DtCStringHashKey& orig);

   // equality operator
   virtual bool operator==(const DtBaseHashKey& other) const;

   // Make a copy of this hash key.
   virtual DtBaseHashKey* clone() const;

   // Get hash key value.
   virtual const char* value() const;
   virtual const DtString stringRep() const;

   // Set hash key value
   virtual void setValue(const char* val);

protected:

   // Compute the hashed value for this key.
   virtual DtU32 computeHashValue();

protected:

   char* myString;
};

#endif