usbclasses/usbphoneasmodem/classimplementation/mscfileserver/src/filesystemimage.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 09:14:30 +0200
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// Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// 
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// 
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/** 
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 @file
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 CFileSystemImage implementation
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 */
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#include "FileSystemImage.h"
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#include "debug.h"
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const TInt KImageFileMode = EFileShareReadersOnly | EFileRead;
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CFileSystemImage::CFileSystemImage() :
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    iIsOpened( EFalse )
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	{
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	// No implementation required
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	}
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CFileSystemImage::~CFileSystemImage()
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	{
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	// iFile will be closed with the session if it's still open
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	iFs.Close();
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	delete iFileName;
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	}
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CFileSystemImage* CFileSystemImage::NewL( const TDesC& aFileName )
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	{
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	CFileSystemImage* self = new (ELeave) CFileSystemImage();
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	CleanupStack::PushL( self );
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	self->ConstructL( aFileName );
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	CleanupStack::Pop( self );
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	return self;
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	}
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void CFileSystemImage::ConstructL( const TDesC& aFileName )
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	{
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	TRACE_FUNC
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	User::LeaveIfError( iFs.Connect() );
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	iFileName = aFileName.AllocL();
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	TRACE_INFO(( _L( "Image file is '%S'" ), iFileName ))
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	}
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TInt CFileSystemImage::Open()
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	{
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	TRACE_FUNC
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	if ( iIsOpened )
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	    {
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	    TRACE_INFO(( _L( "Image already opened" ) ))
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	    return KErrNone;
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	    }
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	TInt err = iFile.Open( iFs, *iFileName, KImageFileMode );
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	if ( err == KErrNone )
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	    {
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	    iIsOpened = ETrue;
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	    }
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	TRACE_INFO(( _L( "Image opened with error %d" ), err ))
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	return err;
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	}
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TInt CFileSystemImage::Close()
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	{
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	if ( iIsOpened )
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	    {
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	    iFile.Close();
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	    iIsOpened = EFalse;
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	    }
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	return KErrNone;
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	}
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TInt CFileSystemImage::Read( const TInt64& aPos, TInt aLength, TDes8& aBuf )
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	{
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	return iFile.Read( aPos, aBuf, aLength );
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	}
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TInt CFileSystemImage::Write( const TInt64& /*aPos*/, TDesC8& /*aBuf*/ )
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	{
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	return KErrAccessDenied;
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	}
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TInt64 CFileSystemImage::Size()
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	{
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	TInt size;
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	iFile.Size( size );
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	return size;
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	}