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hashtable_inl.h from NeoEngineNG at Krugle


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/***************************************************************************
                 hashtable_inl.h  -  Hash table implementation
                             -------------------
    begin                : Sun Sep 1 2002
    copyright            : (C) 2002 by Reality Rift Studios
    email                : mattias@realityrift.com
 ***************************************************************************

 The contents of this file are subject to the Mozilla Public License Version
 1.1 (the "License"); you may not use this file except in compliance with
 the License. You may obtain a copy of the License at 
 http://www.mozilla.org/MPL/

 Software distributed under the License is distributed on an "AS IS" basis,
 WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 for the specific language governing rights and limitations under the
 License.

 The Original Code is the NeoEngine, hashtable_inl.h

 The Initial Developer of the Original Code is Mattias Jansson.
 Portions created by Mattias Jansson are Copyright (C) 2002
 Reality Rift Studios. All Rights Reserved.

 ***************************************************************************/


template < class HashTableType > inline HashTableNode< HashTableType >::HashTableNode( const HashString &rstrKey, HashTableType *pkData ) :
	m_strKey( rstrKey ),
	m_pkData( pkData )
{
}

template < class HashTableType > inline HashTableNode< HashTableType >::HashTableNode( const HashTableNode< HashTableType > &rkNode ) :
	m_strKey( rkNode.m_strKey ),
	m_pkData( rkNode.m_pkData )
{
}




template < class HashTableType > inline typename HashTable< HashTableType >::HashTableNodeType *HashTable< HashTableType >::LookupNode( const HashString &rstrKey, int iIndex )
{
	unsigned int i = ( iIndex ? iIndex : rstrKey.GetHash() ) % m_iSize;
	
	if( !m_pvkTable[i].size() )
		return 0;

	typename HashTableNodeVec::iterator pkNode = m_pvkTable[i].begin();
	typename HashTableNodeVec::iterator pkEnd  = m_pvkTable[i].end();

	for( ; pkNode != pkEnd; ++pkNode )
	{
		if( pkNode->m_strKey == rstrKey )
			return &(*pkNode);
	}

	return 0;
}


template < class HashTableType > HashTable< HashTableType >::HashTable( int iSize ) :
	m_pvkTable( new HashTableNodeVec[ iSize ] ),
	m_iSize( iSize ),
	m_uiElements( 0 )
{
}


template < class HashTableType > HashTable< HashTableType >::~HashTable()
{ 
	delete [] m_pvkTable;
}


template < class HashTableType > HashTableType *HashTable< HashTableType >::Insert( const HashString &rstrKey, HashTableType *pkData )
{
	assert( m_pvkTable );

	unsigned int i = rstrKey.GetHash() % m_iSize;

	HashTableNodeType *pkNode = LookupNode( rstrKey, i );

	if( pkNode )
	{
		HashTableType *pkRet = pkNode->m_pkData;

		pkNode->m_pkData = pkData;

		return pkRet;
	}

	m_pvkTable[i].push_back( HashTableNodeType( rstrKey, pkData ) );

	++m_uiElements;

	return 0;
}


template < class HashTableType > HashTableType *HashTable< HashTableType >::Find( const HashString &rstrKey )
{
	assert( m_pvkTable );

	HashTableNodeType *pkNode = LookupNode( rstrKey );

	return( pkNode ? pkNode->m_pkData : 0 );
}


template < class HashTableType > HashTableType *HashTable< HashTableType >::Delete( const HashString &rstrKey, HashTableType *pkData )
{
	assert( m_pvkTable );

	unsigned int i = rstrKey.GetHash() % m_iSize;

	typename HashTableNodeVec::iterator pkNode = m_pvkTable[i].begin();
	typename HashTableNodeVec::iterator pkEnd  = m_pvkTable[i].end();

	for( ; pkNode != pkEnd; ++pkNode )
	{
		if( pkNode->m_strKey == rstrKey )
		{
			if( !pkData || ( pkData == pkNode->m_pkData ) )
			{
				HashTableType *pkRet = pkNode->m_pkData;

				m_pvkTable[i].erase( pkNode );
			
				assert( m_uiElements );

				--m_uiElements;

				return pkRet;
			}

			return 0;
		}
	}

	return 0;
}


template < class HashTableType > void HashTable< HashTableType >::GetAllNodes( std::vector< HashTableNode< HashTableType >* > *pvpkVector )
{
	unsigned int uiSize = pvpkVector->size();

	pvpkVector->resize( uiSize + m_uiElements );

	typename HashTableNodePtrVec::iterator ppkDest = pvpkVector->begin() + uiSize;

	for( int i = 0; i < m_iSize; ++i )
	{
		if( !m_pvkTable[i].size() )
			continue;

		typename HashTableNodeVec::iterator pkNode = m_pvkTable[i].begin();
		typename HashTableNodeVec::iterator pkEnd  = m_pvkTable[i].end();

		for( ; pkNode != pkEnd; ++pkNode, ++ppkDest )
			*ppkDest = &(*pkNode);
	}
}


template < class HashTableType > void HashTable< HashTableType >::GetAllNodeData( std::vector< HashTableType* > *pvpkVector )
{
	unsigned int uiSize = pvpkVector->size();

	pvpkVector->resize( uiSize + m_uiElements );

	typename std::vector< HashTableType* >::iterator ppkDest = pvpkVector->begin() + uiSize;

	for( int i = 0; i < m_iSize; ++i )
	{
		if( !m_pvkTable[i].size() )
			continue;

		typename HashTableNodeVec::iterator pkNode = m_pvkTable[i].begin();
		typename HashTableNodeVec::iterator pkEnd  = m_pvkTable[i].end();

		for( ; pkNode != pkEnd; ++pkNode, ++ppkDest )
			*ppkDest = pkNode->m_pkData;
	}
}


template < class HashTableType > void HashTable< HashTableType >::Clear()
{
	for( int i = 0; i < m_iSize; ++i )
		m_pvkTable[i].clear();

	m_uiElements = 0;
}





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NeoEngineNG

NeoenEngine NG (Next Generation) is the evolution of neoengine one,it\'s a different development from NeoEngine2, it\'s a direct inherits from NeoEngine one.\n

Project homepage: http://sourceforge.net/projects/neoengineng
Programming language(s): C,C++
License: other

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