/*

* Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:   

*

*/

#ifndef HNHELPER_H

#define HNHELPER_H

#include <e32hashtab.h>

/**

 * Creates hash.

 * 

 * @param aBuf Descriptor.

 * @return Hash.

 */

inline TUint32 HBuf16Hash( HBufC16* const &  aBuf )

    {

    return DefaultHash::Des16(*aBuf);

    }

/**

 * Creates hash.

 * 

 * @param aBuf Descriptor.

 * @return Hash.

 */

inline TUint32 TDesC16Hash( const TDesC16* const &  aBuf )

    {

    return DefaultHash::Des16(*aBuf);

    }

/**

 * Checks for indentity.

 * 

 * @param aL Descriptor.

 * @param aR Descriptor.

 * @return Bool.

 */

inline TBool HBuf16Ident( HBufC16* const & aL, HBufC16* const & aR )

    {

    return DefaultIdentity::Des16(*aL, *aR);

    }

/**

 * Checks for indentity.

 * 

 * @param aL Descriptor.

 * @param aR Descriptor.

 * @return Bool.

 */

inline TBool TDesC16Ident( const TDesC16* const & aL, const TDesC16* const & aR )

    {

    return DefaultIdentity::Des16(*aL, *aR);

    }

/**

 * Destroys both key and value object of a hashmap.

 */

template <class TKey, class TValue>

void DestroyMapKeyAndValue( RHashMap< TKey*, TValue* > & aHashMap )

	{

	THashMapIter< TKey*, TValue* > iter( aHashMap );

	while ( iter.NextKey() )

		{

		delete *(iter.CurrentKey());

		delete *(iter.CurrentValue());

		}

	}

/**

 * Destroys just value object of a hashmap.

 */

template <class TKey, class TValue>

void DestroyMapValue( RHashMap< TKey*, TValue* > & aHashMap )

	{

	THashMapIter< TKey*, TValue* > iter( aHashMap );

	while ( iter.NextKey() )

		{

		delete *(iter.CurrentValue());

		}

	}

#endif /* HNHELPER_H */