/*

* Copyright (c) 2006-2009 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:  A unicode des buffer with automatic memory handling*

*/

#include "mdsclausebuffer.h"

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

// NewL

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

//

EXPORT_C CMdsClauseBuffer* CMdsClauseBuffer::NewL( TInt aInitialSize )

    {

    CMdsClauseBuffer* that = CMdsClauseBuffer::NewLC( aInitialSize );

    CleanupStack::Pop( that );

    return that;

    }

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

// NewLC

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

//

EXPORT_C CMdsClauseBuffer* CMdsClauseBuffer::NewLC( TInt aInitialSize )

    {

    CMdsClauseBuffer* that = new( ELeave ) CMdsClauseBuffer();

    CleanupStack::PushL( that );

    that->ConstructL( aInitialSize );

    return that;

    }

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

// CMdCAutoBuf

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

//

CMdsClauseBuffer::CMdsClauseBuffer()

    {

    }

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

// ~CMdCAutoBuf

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

//

CMdsClauseBuffer::~CMdsClauseBuffer()

    {

    delete iBuffer;

    }

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

// ConstructL

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

//

void CMdsClauseBuffer::ConstructL( TInt aInitialSize )

    {

    if ( aInitialSize < 1 )

    	{

    	aInitialSize = 1;

    	}

    iCurrentBufSize = aInitialSize;

    if (aInitialSize > 100000 || aInitialSize < 0)

    	{

    	aInitialSize = 0;

    	}

    iBuffer = HBufC::NewL( iCurrentBufSize );

    }

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

// AppendL

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

//

void CMdsClauseBuffer::AppendL( const TDesC& aDes )

    {

    AppendL( aDes, 0 );

    }

void CMdsClauseBuffer::AppendL( const TDesC& aDes, const TInt aAdditional )

	{

	ReserveSpaceL( iBuffer->Size() + aDes.Length() + 1 + aAdditional );

	iBuffer->Des().Append( aDes );

	}

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

// ReserveSpaceL

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

//

TBool CMdsClauseBuffer::ReserveSpaceL( TInt aRequired )

    {

    // check if the current buffer is enough

    if ( iCurrentBufSize >= aRequired  )

        {

        return EFalse;

        }

	iCurrentBufSize = aRequired;

    // realloc and copy

    iBuffer = iBuffer->ReAllocL( iCurrentBufSize );

    return ETrue;

    }

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

// BufferL

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

//

TPtr CMdsClauseBuffer::BufferL() const

	{

	if( !iBuffer )

		{

		User::Leave( KErrNotFound );

		}

	return iBuffer->Des();

	}

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

// ConstBufferL

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

//

const TDesC& CMdsClauseBuffer::ConstBufferL() const

	{

	if( !iBuffer )

		{

		User::Leave( KErrNotFound );

		}

	return *iBuffer;

	}