/*

* Copyright (c) 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: 

*

*/

#include <e32cons.h>

#include <e32base.h>

#include "logging.h"

#include "portreader.h"

CPortReader* CPortReader::NewL(RComm& aPort)

{

	LOG_MSG("CPortReader::NewL");

	CPortReader* self = new(ELeave) CPortReader(aPort);

	CleanupStack::PushL(self);

	self->ConstructL();

	CleanupStack::Pop(self);

	return self;

}

CPortReader::CPortReader(RComm& aPort) 

: CActive(CActive::EPriorityStandard),

  iPort(aPort),

  iAlreadyReading(EFalse)

{

	LOG_MSG("CPortReader::CPortReader");

}

CPortReader::~CPortReader()

{

	LOG_MSG("CPortReader::~CPortReader");

	Cancel();

}

void CPortReader::ConstructL()

{

	LOG_MSG("CPortReader::ConstructL");

	CActiveScheduler::Add(this);

}

void CPortReader::StartRead(MDataListener* aListener)

{

	LOG_MSG("CPortReader::StartRead");

	if (iAlreadyReading)

		return;

	iListener = aListener;

	IssueReadRequest();

	iAlreadyReading = ETrue;

}

void CPortReader::IssueReadRequest()

{

	LOG_MSG("CPortReader::IssueReadRequest");

	iNextReadChar = 0;

	iReceivedChars.Zero();

	iPort.ReadOneOrMore(iStatus, iReceivedChars);

	SetActive();

}

void CPortReader::RunL()

{

	LOG_MSG("CPortReader::RunL");

	// pass the data onto listener

	if (iStatus.Int() == KErrNone && iListener)		

		iListener->DataAvailable(iReceivedChars, iReceivedChars.Length());

	// continue waiting for data

	IssueReadRequest();	

}

void CPortReader::DoCancel()

{	

	LOG_MSG("CPortReader::DoCancel");

	iPort.ReadCancel();

	iAlreadyReading = EFalse;

}