1 /*

     2 * Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

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

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  this class handls key operation

    15 *

    16 */

    17 

    18 #ifndef __TPENGSTORAGESERVERBTREEKEYS_H__

    19 #define __TPENGSTORAGESERVERBTREEKEYS_H__

    20 

    21 // INCLUDES

    22 #include	<s32btree.h>

    23 #include	"CPEngDataEntry.h"

    24 #include	"PEngStorageServerCommon.h"

    25 

    26 

    27 // CLASS DECLARATION

    28 class TPEngBaseKey : public MBtreeKey

    29     {

    30     public:

    31         /*

    32          *	Return key which is between aLeft and aRight. Can be also equal to left.

    33          */

    34         void Between( const TAny* aLeft, const TAny* aRight, TBtreePivot& aPivot ) const

    35             {

    36             __ASSERT_ALWAYS( aLeft && aRight, User::Panic( KStorageServerName, EErrorInBTree ) );

    37             //Return key equal to left.

    38             aPivot.Copy( reinterpret_cast<const TUint8*>( aLeft ), 4 );

    39             }

    40 

    41         //Compare two keys.

    42         TInt Compare( const TAny* aLeft, const TAny* aRight ) const

    43             {

    44             __ASSERT_ALWAYS( aLeft && aRight, User::Panic( KStorageServerName, EErrorInBTree ) );

    45             HBufC* left = *reinterpret_cast<HBufC**>( const_cast<TAny*>( aLeft ) );

    46             HBufC* right = *reinterpret_cast<HBufC**>( const_cast<TAny*>( aRight ) );

    47             TInt ret = left->CompareF( *right );

    48             return ret;

    49             }

    50     };

    51 

    52 class TPEngDataEntryKey : public TPEngBaseKey

    53     {

    54     public:

    55 

    56         //Get pointer to entry key.(HBufC**)

    57         const TAny* Key( const TAny* anEntry ) const

    58             {

    59             __ASSERT_ALWAYS( anEntry, User::Panic( KStorageServerName, EErrorInBTree ) );

    60             CPEngDataEntry* entry = *reinterpret_cast<CPEngDataEntry**>( const_cast<TAny*>( anEntry ) );

    61             return entry->KeyBuffer();

    62             }

    63     };

    64 

    65 #endif      //  __TPENGSTORAGESERVERBTREEKEYS_H__

    66 

    67 //  End of File