dbindex.cpp

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
 *  
 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. 
 *      
 * The contents of this file, and the files included with this file, are 
 * subject to the current version of the RealNetworks Public Source License 
 * Version 1.0 (the "RPSL") available at 
 * http://www.helixcommunity.org/content/rpsl unless you have licensed 
 * the file under the RealNetworks Community Source License Version 1.0 
 * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl, 
 * in which case the RCSL will apply. You may also obtain the license terms 
 * directly from RealNetworks.  You may not use this file except in 
 * compliance with the RPSL or, if you have a valid RCSL with RealNetworks 
 * applicable to this file, the RCSL.  Please see the applicable RPSL or 
 * RCSL for the rights, obligations and limitations governing use of the 
 * contents of the file.  
 *  
 * This file is part of the Helix DNA Technology. RealNetworks is the 
 * developer of the Original Code and owns the copyrights in the portions 
 * it created. 
 *  
 * This file, and the files included with this file, is distributed and made 
 * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
 * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS 
 * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
 * 
 * Technology Compatibility Kit Test Suite(s) Location: 
 *    http://www.helixcommunity.org/content/tck 
 * 
 * Contributor(s): 
 *  
 * ***** END LICENSE BLOCK ***** */ 

#include "dbindex.h"
#include "ihxpckts.h"

				      
// XXXND  FIX  Is there a better size for this?				      
const UINT32 kInitHashTableSize = 47;


//---------------------- CPluginDatabaseIndex


CPluginDatabaseIndex::CPluginDatabaseIndex()
{
}


// static 
CPluginDatabaseIndex* CPluginDatabaseIndex::CreateIndex( EPluginIndexType indexType )
{
    CPluginDatabaseIndex* pNewIndex = NULL;

    switch( indexType )
    {
	case kIndex_StringType:
	    pNewIndex = new CPluginDatabaseIndexString();
	    break;

	case kIndex_GUIDType:
	    pNewIndex = new CPluginDatabaseIndexGUID();
	    break;
    }

    return pNewIndex;
}



//---------------------- CPluginDatabaseIndexGUID

CPluginDatabaseIndexGUID::CPluginDatabaseIndexGUID()
{
    m_mapGUIDToIUnknown.InitHashTable( kInitHashTableSize, FALSE );
}


CPluginDatabaseIndexGUID::~CPluginDatabaseIndexGUID()
{
    Reset();
}

HX_RESULT CPluginDatabaseIndexGUID::AddItem( IHXBuffer* pData, IUnknown* pIUnknown )
{
    HX_RESULT result = HXR_FAIL;

    if( pData && pIUnknown )
    {
	// Treat the stuff in pData like a GUID
	GUID* pGUID = (GUID*) pData->GetBuffer();

	void* pValue = NULL;
	if( !m_mapGUIDToIUnknown.Lookup( *pGUID, pValue ) )
	{
	    m_mapGUIDToIUnknown.SetAt( *pGUID, pIUnknown );
	    pIUnknown->AddRef();
	    result = HXR_OK;
	}
    }

    return result;
}


HX_RESULT CPluginDatabaseIndexGUID::FindItem( const void* pData, IUnknown** pIUnknown )
{
    HX_RESULT result = HXR_FAIL;

    if( pIUnknown )
    {
    	*pIUnknown = NULL;

	void* pValue = NULL;
	if( m_mapGUIDToIUnknown.Lookup( *(GUID*) pData, pValue ) )
	{
	    *pIUnknown = (IUnknown*) pValue;
	    (*pIUnknown)->AddRef();
    
	    result = HXR_OK;
	}
    }

    return result;
}


HX_RESULT CPluginDatabaseIndexGUID::RemoveItem( IUnknown* pIValue )
{
    HX_RESULT result = HXR_FAIL;

    CHXMapGUIDToObj::Iterator iter = m_mapGUIDToIUnknown.Begin();
    CHXMapGUIDToObj::Iterator iterEnd = m_mapGUIDToIUnknown.End();

    for( ; iter != iterEnd; ++iter )
    {
	// Get the IUnknown 
	if( pIValue == (IUnknown*)(*iter) )
	{
	    if( m_mapGUIDToIUnknown.RemoveKey( *iter.get_key() ) )
	    {
		HX_RELEASE(pIValue);

		result = HXR_OK;
	    }

	    break;
	}
    }

    return result;
}


void CPluginDatabaseIndexGUID::Reset()
{
    CHXMapGUIDToObj::Iterator iter = m_mapGUIDToIUnknown.Begin();
    CHXMapGUIDToObj::Iterator iterEnd = m_mapGUIDToIUnknown.End();

    for( ; iter != iterEnd; ++iter )
    {
	// Get the IUnknown 
	IUnknown* pUnknown = (IUnknown*)(*iter);
	HX_RELEASE(pUnknown);
    }

    m_mapGUIDToIUnknown.RemoveAll();
}




//------------------------------ CPluginDatabaseIndexString

CPluginDatabaseIndexString::CPluginDatabaseIndexString()
{

}


CPluginDatabaseIndexString::~CPluginDatabaseIndexString()
{
    Reset();
}


HX_RESULT CPluginDatabaseIndexString::AddItem( IHXBuffer* pData, IUnknown* pIUnknown )
{
    HX_RESULT result = HXR_FAIL;

    if( pData && pIUnknown )
    {
	const char *pCharData = (const char*) pData->GetBuffer();

	void* pValue = NULL;
	if( !m_mapStrToIUnknown.Lookup( pCharData, pValue ) )
	{
	    m_mapStrToIUnknown.SetAt( pCharData, pIUnknown );
	    pIUnknown->AddRef();
	    result = HXR_OK;
	}
    }

    return result;
}


HX_RESULT CPluginDatabaseIndexString::FindItem( const void* pData, IUnknown** pIUnknown )
{
    HX_RESULT result = HXR_FAIL;

    if( pIUnknown )
    {
    	*pIUnknown = NULL;

	void* pValue = NULL;
	if( m_mapStrToIUnknown.Lookup( (const char*) pData, pValue ) )
	{
	    *pIUnknown = (IUnknown*) pValue;
	    (*pIUnknown)->AddRef();
    
	    result = HXR_OK;
	}
    }

    return result;
}


HX_RESULT CPluginDatabaseIndexString::RemoveItem( IUnknown* pIValue )
{
    HX_RESULT result = HXR_FAIL;

    CHXMapStringToOb::Iterator iter = m_mapStrToIUnknown.Begin();
    CHXMapStringToOb::Iterator iterEnd = m_mapStrToIUnknown.End();

    for( ; iter != iterEnd; ++iter )
    {
	// Get the IUnknown 
	if( pIValue == (IUnknown*)(*iter) )
	{
	    if( m_mapStrToIUnknown.RemoveKey( iter.get_key() ) )
	    {
		HX_RELEASE(pIValue);

		result = HXR_OK;
	    }

	    break;
	}
    }

    return result;
}



void CPluginDatabaseIndexString::Reset()
{
    CHXMapStringToOb::Iterator iter = m_mapStrToIUnknown.Begin();
    CHXMapStringToOb::Iterator iterEnd = m_mapStrToIUnknown.End();

    for( ; iter != iterEnd; ++iter )
    {
	// Get the IUnknown 
	IUnknown* pUnknown = (IUnknown*)(*iter);
	HX_RELEASE(pUnknown);
    }

    m_mapStrToIUnknown.RemoveAll();
}