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

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 // 

    15 // 

    16 

    17 /** 

    18  @file

    19  CFileSystemImage implementation

    20  */

    21 

    22 #include "FileSystemImage.h"

    23 #include "debug.h"

    24 

    25 const TInt KImageFileMode = EFileShareReadersOnly | EFileRead;

    26 

    27 CFileSystemImage::CFileSystemImage() :

    28     iIsOpened( EFalse )

    29 	{

    30 	// No implementation required

    31 	}

    32 

    33 CFileSystemImage::~CFileSystemImage()

    34 	{

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

    36 	iFs.Close();

    37 	delete iFileName;

    38 	}

    39 

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

    41 	{

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

    43 	CleanupStack::PushL( self );

    44 	self->ConstructL( aFileName );

    45 	CleanupStack::Pop( self );

    46 	return self;

    47 	}

    48 

    49 void CFileSystemImage::ConstructL( const TDesC& aFileName )

    50 	{

    51 	TRACE_FUNC

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

    53 	iFileName = aFileName.AllocL();

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

    55 	}

    56 

    57 TInt CFileSystemImage::Open()

    58 	{

    59 	TRACE_FUNC

    60 	if ( iIsOpened )

    61 	    {

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

    63 	    return KErrNone;

    64 	    }

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

    66 	if ( err == KErrNone )

    67 	    {

    68 	    iIsOpened = ETrue;

    69 	    }

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

    71 	return err;

    72 	}

    73 

    74 TInt CFileSystemImage::Close()

    75 	{

    76 	if ( iIsOpened )

    77 	    {

    78 	    iFile.Close();

    79 	    iIsOpened = EFalse;

    80 	    }

    81 	return KErrNone;

    82 	}

    83 

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

    85 	{

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

    87 	}

    88 

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

    90 	{

    91 	return KErrAccessDenied;

    92 	}

    93 

    94 TInt64 CFileSystemImage::Size()

    95 	{

    96 	TInt size;

    97 	iFile.Size( size );

    98 	return size;

    99 	}