/*

* Copyright (c) 2007-2009 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: 

*

*/

/**

 @file

 @internalComponent

 @released

*/

#include "typedefs.h"

#include "rofsimage.h"

/** 

Constructor.

@internalComponent

@released

@param aReader - image reader pointer

*/

RofsImage::RofsImage(RCoreImageReader *aReader)

: CCoreImage(aReader) ,

iRofsHeader(0), iRofsExtnHeader(0),iAdjustment(0), 

iImageType((RCoreImageReader::TImageType)0)

{

}

/** 

Destructor deletes iRofsHeader and iRofsExtnHeader.

@internalComponent

@released

@param aReader - image reader pointer

*/

RofsImage::~RofsImage()

{

	DELETE(iRofsHeader);

	DELETE(iRofsExtnHeader);

}

/** 

Function responsible to read the ROFS image and to construct the tree for the 

elements available in Directory section.

@internalComponent

@released

@return - returns the error code

*/

TInt RofsImage::ProcessImage()

{

	int result = CreateRootDir();

	if (result == KErrNone)

	{

		if (iReader->Open())

		{

			iImageType = iReader->ReadImageType();

			if (iImageType == RCoreImageReader::E_ROFS)

			{

				iRofsHeader = new TRofsHeader;

				result = iReader->ReadCoreHeader(*iRofsHeader);

				if (result != KErrNone)

					return result;

				SaveDirInfo(*iRofsHeader);

				result = ProcessDirectory(0);

			}

			else if (iImageType == RCoreImageReader::E_ROFX)

			{

				iRofsExtnHeader = new TExtensionRofsHeader ;

				result = iReader->ReadExtensionHeader(*iRofsExtnHeader);

				if(result != KErrNone)

					return result;

				long filePos = iReader->FilePosition();

				iAdjustment = iRofsExtnHeader->iDirTreeOffset - filePos;

				SaveDirInfo(*iRofsExtnHeader);

				result = ProcessDirectory(iAdjustment);

			}

			else

			{

				result = KErrNotSupported;

			}

		}

		else

		{

			result = KErrGeneral;

		}

	}

	return result;

}