/*

* 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:  Stack to hold the data start and end markers

*

*/

// INCLUDE FILES

#include "CPEngParserStack.h"

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

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

// CPEngParserStack::CPEngParserStack

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

// might leave.

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

//

CPEngParserStack::CPEngParserStack()

    {

    }

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

// CPEngParserStack::NewL

// Two-phased constructor.

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

//

CPEngParserStack* CPEngParserStack::NewL()

    {

    CPEngParserStack* self = new( ELeave ) CPEngParserStack;

    return self;

    }

// Destructor

CPEngParserStack::~CPEngParserStack()

    {

    iStartArray.Reset();

    iEndArray.Reset();

    }

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

// CPEngParserStack::PushStartL

// Pushes a start element to the stack

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

//

TInt CPEngParserStack::PushStart( TUint aItem )

    {

    return iStartArray.Append( aItem );

    }

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

// CPEngParserStack::PushEndL

// Pushes an end element to the stack

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

//

TInt CPEngParserStack::PushEnd( TUint aItem )

    {

    return iEndArray.Append( aItem );

    }

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

// CPEngParserStack::PopStart

// Pops a start element from the stack

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

//

TUint CPEngParserStack::PopStart()

    {

    TUint pos( iStartArray.Count() - 1 ); // take the last one

    TUint returnable( iStartArray[pos] );

    iStartArray.Remove( pos );

    return returnable;

    }

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

// CPEngParserStack::PopEnd

// Pops an end element from the stack

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

//

TUint CPEngParserStack::PopEnd()

    {

    TUint pos( iEndArray.Count() - 1 ); // take the last one

    TUint returnable( iEndArray[pos] );

    iEndArray.Remove( pos );

    return returnable;

    }

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

// CPEngParserStack::Pop

// Pops the start&end markers pair from the stack.

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

//

TPoint CPEngParserStack::Pop()

    {

    TPoint returnablePoint;

    if ( ( iStartArray.Count() > 0 ) &&

         ( iEndArray.Count() > 0 ) )

        {

        returnablePoint.iX = PopStart();

        returnablePoint.iY = PopEnd();

        }

    else    // something wrong with the array, set negative values

        {   // shouldn't happen, because the WV engine checks the XML

        returnablePoint.iX = KErrCorrupt;

        returnablePoint.iY = KErrCorrupt;

        }

    return returnablePoint;

    }

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

// CPEngParserStack::Reset

// Resets the element arrays

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

//

void CPEngParserStack::Reset()

    {

    iEndArray.Reset();

    iStartArray.Reset();

    }

//  End of File