/*

* Copyright (c) 2004 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:  Content writer for the XML Serializer.

*

*/

// INCLUDE FILES

#include <e32std.h>

#include "TPEngWriter.h"

// ================= MEMBER FUNCTIONS =======================

// C++ default constructor can NOT contain any code, that

// might leave.

//

TPEngWriter::TPEngWriter( TDes8& aBuffer )

        : iBuffer( aBuffer )

    {

    }

// -----------------------------------------------------------------------------

// TPEngWriter::WriteL()

//

// Writes the text to buffer, leaves if the buffer overflows.

// Returns pointer descriptor pointing to just written text

// (pointer desriptor stays valid until the actual buffer stays valid).

// -----------------------------------------------------------------------------

//

const TPtrC8 TPEngWriter::WriteL( const TDesC8& aText )

    {

    if ( iBuffer.MaxLength() < ( iBuffer.Length() + aText.Length() ) )

        {

        User::Leave( KErrOverflow );

        }

    else

        {

        TInt startOfNew( iBuffer.Length() );

        iBuffer.Append( aText );

        return iBuffer.Mid( startOfNew );

        }

    return TPtrC8( NULL, 0 );

    }

// -----------------------------------------------------------------------------

// TPEngWriter::WriteL()

//

// Writes one character to buffer, leaves if the buffer overflows.

// -----------------------------------------------------------------------------

//

void TPEngWriter::WriteL( TUint8 aCharacter )

    {

    if ( iBuffer.MaxLength() < ( iBuffer.Length() + 1 ) ) //here magic number 1 means that we are

        //writing just one character at time

        {

        User::Leave( KErrOverflow );

        }

    else

        {

        iBuffer.Append( &aCharacter, 1 );  //here magic number 1 means that we are

        //writing just one character at time

        }

    }

// -----------------------------------------------------------------------------

// TPEngWriter::CurrentLength()

// -----------------------------------------------------------------------------

//

TInt TPEngWriter::CurrentLength()

    {

    return iBuffer.Length();

    }

// -----------------------------------------------------------------------------

// TPEngWriter::ReverseTo()

// -----------------------------------------------------------------------------

//

TInt TPEngWriter::ReverseTo( TInt aLength )

    {

    if ( aLength > iBuffer.Length() )

        {

        return KErrUnderflow;

        }

    iBuffer.SetLength( aLength );

    return KErrNone;

    }

//  End of File