// 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: CFileSystemImage implementation

// 

// 

#include "filesystemimage.h"

#include "debug.h"

const TInt KImageFileMode = EFileShareReadersOnly | EFileRead;

CFileSystemImage::CFileSystemImage() :

    iIsOpened( EFalse )

	{

	// No implementation required

	}

CFileSystemImage::~CFileSystemImage()

	{

	// iFile will be closed with the session if it's still open

	iFs.Close();

	delete iFileName;

	}

CFileSystemImage* CFileSystemImage::NewL( const TDesC& aFileName )

	{

	CFileSystemImage* self = new (ELeave) CFileSystemImage();

	CleanupStack::PushL( self );

	self->ConstructL( aFileName );

	CleanupStack::Pop( self );

	return self;

	}

void CFileSystemImage::ConstructL( const TDesC& aFileName )

	{

	TRACE_FUNC

	User::LeaveIfError( iFs.Connect() );

	iFileName = aFileName.AllocL();

	TRACE_INFO(( _L( "Image file is '%S'" ), iFileName ))

	}

TInt CFileSystemImage::Open()

	{

	TRACE_FUNC

	if ( iIsOpened )

	    {

	    TRACE_INFO(( _L( "Image already opened" ) ))

	    return KErrNone;

	    }

	TInt err = iFile.Open( iFs, *iFileName, KImageFileMode );

	if ( err == KErrNone )

	    {

	    iIsOpened = ETrue;

	    }

	TRACE_INFO(( _L( "Image opened with error %d" ), err ))

	return err;

	}

TInt CFileSystemImage::Close()

	{

	if ( iIsOpened )

	    {

	    iFile.Close();

	    iIsOpened = EFalse;

	    }

	return KErrNone;

	}

TInt CFileSystemImage::Read( const TInt64& aPos, TInt aLength, TDes8& aBuf )

	{

	return iFile.Read( aPos, aBuf, aLength );

	}

TInt CFileSystemImage::Write( const TInt64& /*aPos*/, TDesC8& /*aBuf*/ )

	{

	return KErrAccessDenied;

	}

TInt64 CFileSystemImage::Size()

	{

	TInt size;

	iFile.Size( size );

	return size;

	}