114 lines
3 KiB
C++
114 lines
3 KiB
C++
/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2008 by Sun Microsystems, Inc.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* $RCSfile: hashtbl.hxx,v $
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* $Revision: 1.4 $
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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#ifndef _HASHTBL_HXX
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#define _HASHTBL_HXX
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// ADT hash table
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//
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// Invariante:
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// 1. m_lElem < m_lSize
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// 2. die Elemente in m_Array wurden double-hashed erzeugt
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//
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class HashItem;
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class HashTable
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{
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unsigned long m_lSize;
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unsigned long m_lElem;
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HashItem *m_pData;
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double m_dMaxLoadFactor;
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double m_dGrowFactor;
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bool m_bOwner;
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unsigned long Hash(const char *cKey) const;
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unsigned long DHash(const char *cKey , unsigned long lHash) const;
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unsigned long Probe(unsigned long lPos) const;
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HashItem* FindPos(const char *cKey) const;
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void SmartGrow();
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double CalcLoadFactor() const;
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protected:
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friend class HashTableIterator;
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virtual void OnDeleteObject(void* pObject);
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void* GetObjectAt(unsigned long lPos) const;
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// Default-Werte
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public:
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static double m_defMaxLoadFactor;
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static double m_defDefGrowFactor;
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public:
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HashTable
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(
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unsigned long lSize,
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bool bOwner,
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double dMaxLoadFactor = HashTable::m_defMaxLoadFactor /* 0.8 */,
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double dGrowFactor = HashTable::m_defDefGrowFactor /* 2.0 */
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);
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virtual ~HashTable();
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bool IsFull() const;
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unsigned long GetSize() const { return m_lSize; }
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void* Find (const char *cKey ) const;
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bool Insert (const char *cKey , void* pObject);
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void* Delete (const char *cKey);
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};
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// ADT hash table iterator
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//
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// Invariante: 0 <= m_lAt < m_aTable.GetCount()
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//
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class HashTableIterator
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{
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unsigned long m_lAt;
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HashTable const& m_aTable;
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void operator =(HashTableIterator &); // not defined
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void* FindValidObject(bool bForward);
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protected:
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void* GetFirst(); // Interation _ohne_ Sortierung
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void* GetNext();
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void* GetLast();
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void* GetPrev();
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public:
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HashTableIterator(HashTable const&);
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};
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#endif // _HASHTBL_HXX
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