--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmserv/radioutility/presetutility/inc/cenrepbookkeeping.h	Mon May 03 12:59:52 2010 +0300
@@ -0,0 +1,122 @@
+/*
+* Copyright (c) 2009 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:  This is a class, responsible of keeping track of existing presets
+*               and their indexes.
+*
+*
+*/
+
+#ifndef CCENREPBOOKKEEPING_H_
+#define CCENREPBOOKKEEPING_H_
+
+#include <e32base.h>
+
+class RWriteStream;
+class RReadStream;
+
+const TInt KMaxNumberOfPresetStations = 100;  // One temporarily used for internal book keeping
+
+#define  LENGTHOFUSEDINDEXLWORDSARRAY ((KMaxNumberOfPresetStations/32) + 1)
+/**
+ *  it is a class, responsible of keeping track of existing presets and their indexes.
+ */
+NONSHARABLE_CLASS( CCenrepBookKeeping ) : public CBase
+{
+public:
+
+    /**
+    * Default class constructor.
+    */
+    CCenrepBookKeeping();
+
+    /**
+    * Destructor of CCenrepBookKeeping class.
+    */
+    ~CCenrepBookKeeping();
+
+    /**
+    * Get the current number of presets.
+    * @return The number of presets.
+    */
+    TInt PresetCount() const;
+
+    /**
+    * Get the index of first preset.
+    * @return The first preset index.
+    */        
+    TInt FirstIndex() const;
+
+    /**
+    * Get the index of the next preset.
+    * @param aFromIndex -  Start from index after this.
+    * @return the next preset index.
+    */           
+    TInt NextIndex( TInt aFromIndex = 0 );
+
+    /**
+    * Find an unused preset index.
+    * @return Allocated index.
+    */           
+    TInt FindUnusedIndex() const;
+    
+    /**
+    * Check if given index is used.
+    * @return ETrue if used, otherwise EFalse 
+    */           
+    TBool IsIndexUsed( const TInt aIndex );
+
+    /**
+    * Add a preset.
+    * @param aIndex -  Proposed index.
+    * @return Used/Allocated index.
+    */           
+    void AddIndex( const TInt aIndex );
+
+    /**
+    * Remove a preset.
+    * @param aIndex -  Index of the preset to be removed.
+    * @return Used/Allocated index.
+    */           
+    void RemoveIndex( const TInt aIndex );
+
+    /**
+    * Clear all data.
+    * @return The first preset index.
+    */
+    void Clear();
+    
+    /**
+    * Gives descriptor pointer to bookkeeping's data.
+    * @return TPtr8 Descriptor that contains bookkeeping data.
+    */
+    TPtr8 BookKeepingData();
+
+private:
+
+    // This data is copied to Central Repository Key (buffer) as such without
+    // actual serialization.
+    // Therefore in order to keep backward incombatibility don't
+    // change the order of fields. Only the last array field can be allowed to grow.
+    // If a new field is added to the end, the preceding array field cannot grow anymore.
+    // Additionally the size of this structure should never shrink.
+    class TBookKeepingData 
+    {
+    public:
+        TInt iCount;    
+        TUint32 iUsedIndexLWords[ LENGTHOFUSEDINDEXLWORDSARRAY ];
+    } iBookKeepingData;
+
+};
+
+#endif // CCENREPBOOKKEEPING_H_