// Copyright (c) 2007-2009 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:

//

/**

 @file

 @internalComponent

 @released

*/

#include "eventsmask.h"

#ifdef _DEBUG

_LIT(KEventsMask, "TEventsMask");

#endif

TEventsMask::TEventsMask ()

	{

	Reset();

	}

void TEventsMask::Reset()

	{

	iMask = 0x0000;

	iNextSupportedEvent = 0x00;

	}

TBool TEventsMask::Find(TRegisterNotificationEvent aEvent) const

	{

	return ( (0x0001 << (aEvent -1)) & iMask ) ? ETrue : EFalse;

	}

void TEventsMask::Append(TRegisterNotificationEvent aEvent)

	{

	// the assertion assures that aEvent is a valid argument (in the range) 

	__ASSERT_DEBUG((aEvent >= ERegisterNotificationPlaybackStatusChanged) && 

		(aEvent < ERegisterNotificationReservedLast), 

		User::Panic(KEventsMask, KErrArgument));

	iMask |= (0x0001 << (aEvent -1));

	}

void TEventsMask::Remove(TRegisterNotificationEvent aEvent)

	{

	// the assertion assures that aEvent is a valid argument (in the range)

	__ASSERT_DEBUG((aEvent >= ERegisterNotificationPlaybackStatusChanged) && 

		(aEvent < ERegisterNotificationReservedLast), 

		User::Panic(KEventsMask, KErrArgument));

	iMask &= ~(0x0001 << (aEvent -1));

	}

void TEventsMask::Begin()

	{

	iNextSupportedEvent = 0x00;

	}

TBool TEventsMask::Next()

	{

	TUint index = iNextSupportedEvent+1;

	if (index == ERegisterNotificationReservedLast)

		{

		return EFalse;

		}

	while( (!Find((TRegisterNotificationEvent)index)) && (index < ERegisterNotificationReservedLast) )

		{

		index++;

		}

	if (index < ERegisterNotificationReservedLast)

		{

		iNextSupportedEvent = index;

		return ETrue;

		}

	else

		{

		return EFalse;

		}

	}

TRegisterNotificationEvent TEventsMask::Get() const

	{

	// if Get() is called before calling Begin() and at least one call to Next()

	// it Panics because iNextSupportedEvent is invalid (equals to 0x00).

	__ASSERT_DEBUG(iNextSupportedEvent >= ERegisterNotificationPlaybackStatusChanged, User::Panic(KEventsMask, KErrUnderflow));

	// this should never happen, it would mean that iNextSupport overtakes the

	// last valid value

	__ASSERT_DEBUG(iNextSupportedEvent < ERegisterNotificationReservedLast, User::Panic(KEventsMask, KErrOverflow));

	return static_cast<TRegisterNotificationEvent>(iNextSupportedEvent);

	}