/*

* Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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: 

* CDIRREGION.H

* Directory Region Operations for FileSystem component

* @internalComponent

* @released

*

*/

#ifndef DIRREGION_H

#define DIRREGION_H

#include "filesystemclass.h"

#include "longname.h"

#include <fstream>

#include <map>

#include <string>

class CFileSystem;

typedef ofstream OfStream;

typedef ifstream IfStream;

typedef ios Ios;

typedef map<unsigned int,string> StringMap;

/**

This class describes the member functions and data members required to create directory/data

region of FAT image.

@internalComponent

@released

*/

class CDirRegion

	{

	private: 

		unsigned int Get32BitClusterNumber(unsigned int aHighWord, unsigned int aLowWord);

		void CheckEntry(EntryList aNodeList);

		void CreateDirEntry(CDirectory* aEntry,unsigned int aParentDirClusterNumber);

		void CreateAndWriteCurrentDirEntry(unsigned int aCurClusterNumber,string& aString);

		void CreateAndWriteParentDirEntry(unsigned int aParDirClusterNumber,string& aString); 

		void WriteFileDataInToCluster(CDirectory* aEntry); 

		void PushStringIntoClusterMap(unsigned int aNumber, 

									  string& aDirString,

									  unsigned long int aClusterSize,

									  char aAttribute);

		void PushDirectoryEntryString(unsigned int aNumber,string& aString,int aClustersRequired);

	public:

		CDirRegion(	EntryList iNodeList,

					CFileSystem *aFileSystemPtr);

		~CDirRegion();

		void Execute();

		void WriteClustersIntoFile(OfStream& aOutPutStream);

		TClustersPerEntryMap* GetClustersPerEntryMap() const;

	private:

		IfStream iInputStream; //Input stream, used to read file contents

		CCluster* iClusterPtr; //pointer to class CCluster

		bool iCurrentDirEntry; //Is current entry(.) is created?

		bool iParentDirEntry;//Is parent entry (..) is created?

		bool iFirstCluster; //Is this the first cluster for the current FAT image?

		unsigned int iCurEntryClusterNumber; //Holds current entries cluster number

		unsigned int iClusterKey; //Number used to map cluster with cluster contents

		/* To avoid calling CCluster::GetClusterSize() function multiple times, this 

		 *variable introduced.

		 */

		unsigned long int iClusterSize;

		StringMap iClusterMap; //The map between cluster number and cluster

		unsigned int iRootDirSizeInBytes;//Reserved sectors for root directory entry

		EntryList iNodeList;//To hold root directory entry

	};

#endif //DIRREGION_H