223 lines
8.8 KiB
C++
223 lines
8.8 KiB
C++
/*************************************************************************
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*
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* $RCSfile: hashtbl.hxx,v $
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*
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* $Revision: 1.1 $
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*
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* last change: $Author: nf $ $Date: 2001-04-11 09:52:26 $
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*
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* The Contents of this file are made available subject to the terms of
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* either of the following licenses
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*
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* - GNU Lesser General Public License Version 2.1
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* - Sun Industry Standards Source License Version 1.1
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*
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* Sun Microsystems Inc., October, 2000
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2000 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*
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* Sun Industry Standards Source License Version 1.1
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* =================================================
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* The contents of this file are subject to the Sun Industry Standards
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* Source License Version 1.1 (the "License"); You may not use this file
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* except in compliance with the License. You may obtain a copy of the
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* License at http://www.openoffice.org/license.html.
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*
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* Software provided under this License is provided on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
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* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
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* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
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* See the License for the specific provisions governing your rights and
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* obligations concerning the Software.
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*
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* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
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*
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* Copyright: 2000 by Sun Microsystems, Inc.
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*
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* All Rights Reserved.
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*
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* Contributor(s): _______________________________________
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*
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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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~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* 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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// typsichere Makros ---------------------------------------------------
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#define DECLARE_HASHTABLE_INTERN(ClassName,Owner,KeyType,ObjType) \
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class ClassName : public HashTable \
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{ \
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public: \
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ClassName \
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( \
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unsigned long lSize, \
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double dMaxLoadFactor = HashTable::m_defMaxLoadFactor, \
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double dGrowFactor = HashTable::m_defDefGrowFactor \
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) \
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: HashTable(lSize,Owner,dMaxLoadFactor,dGrowFactor) {} \
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\
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ObjType Find (KeyType const& Key) const \
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{ return (ObjType) HashTable::Find((char *) Key); } \
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\
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bool Insert (KeyType const& Key, ObjType Object) \
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{ return HashTable::Insert((char *) Key, (void*) Object); } \
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\
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ObjType Delete (KeyType const&Key) \
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{ return (ObjType) HashTable::Delete ((char *) Key); } \
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};
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// HashTable OHNE Owner-Verhalten
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#define DECLARE_HASHTABLE(ClassName,KeyType,ObjType) \
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DECLARE_HASHTABLE_INTERN(ClassName,false,KeyType,ObjType)
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// HashTable MIT Owner-Verhalten
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#define DECLARE_HASHTABLE_OWNER(ClassName,KeyType,ObjType) \
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DECLARE_HASHTABLE_INTERN(ClassName##2,true,KeyType,ObjType) \
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class ClassName : public ClassName##2 \
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{ \
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protected: \
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virtual void OnDeleteObject(void* pObject); \
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public: \
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ClassName \
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( \
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unsigned long lSize, \
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double dMaxLoadFactor = HashTable::m_defMaxLoadFactor, \
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double dGrowFactor = HashTable::m_defDefGrowFactor \
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) \
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: ClassName##2(lSize,dMaxLoadFactor,dGrowFactor) {} \
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~ClassName(); \
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};
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#define IMPLEMENT_HASHTABLE_OWNER(ClassName,KeyType,ObjType) \
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void ClassName::OnDeleteObject(void* pObject) \
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{ delete (ObjType) pObject; } \
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\
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ClassName::~ClassName() \
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{ \
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for (unsigned long i=0; i<GetSize(); i++) \
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{ \
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void *pObject = GetObjectAt(i); \
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if (pObject != NULL) \
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OnDeleteObject(pObject); \
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} \
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}
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// Iterator-Makros --------------------------------------------------
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#define DECLARE_HASHTABLE_ITERATOR(ClassName,ObjType) \
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class ClassName : public HashTableIterator \
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{ \
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public: \
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ClassName(HashTable const& aTable) \
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: HashTableIterator(aTable) {} \
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\
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ObjType GetFirst() \
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{ return (ObjType)HashTableIterator::GetFirst(); } \
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ObjType GetNext() \
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{ return (ObjType)HashTableIterator::GetNext(); } \
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ObjType GetLast() \
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{ return (ObjType)HashTableIterator::GetLast(); } \
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ObjType GetPrev() \
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{ return (ObjType)HashTableIterator::GetPrev(); } \
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};
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#endif // _HASHTBL_HXX
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