// Copyright (c) 1997-2009 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:

//

#ifndef __TIMEZONERULES_H__

#define __TIMEZONERULES_H__

#include <e32base.h>

#include <s32std.h>

#include <tzdefines.h>

#include "tzpersisted.h"

const TInt KActualisedRulesGranularity = 8;

// specifies the limits for rules caching.

// (year - KRuleCacheLowerLimit) , (year + KRuleCacheUpperLimit)

// the actual cache includes one more year at year - (KRuleCacheLowerLimit + 1)

// required to provide the offset used at the start of the search 

const TUint KRuleCacheLowerLimit = 2;

const TUint KRuleCacheUpperLimit = 3;

/**

Encapsulates a single Time Zone DST Rule

@internalComponent

@since 9.1

*/

class TTzActualisedRule

	{

public:	

	inline TTzActualisedRule(const TTime& aTimeOfChange, TInt  aStdOffset, TInt aDstOffset, TTzTimeReference aTimeReference);

	inline TTzActualisedRule();

	IMPORT_C void InternalizeL(RReadStream& aStream);

	IMPORT_C void ExternalizeL(RWriteStream& aStream) const;

	static TInt Order(const TTzActualisedRule& aLeft, const TTzActualisedRule& aRight);

public:

	/** time of DST change w.r.t to iTimeReference

	*/

	TTime iTimeOfChange;

	/** std to UTC offset

	*/

	TInt32  iStdOffset;

	/** wall-clock to standard time offset

	*/

	TInt32 iDstOffset;

	/** what time recogning iTimeOfChange is referenced to; see <code> TTzTimeReference </code> 

	*/

	TTzTimeReference iTimeReference;

	};

inline TTzActualisedRule::TTzActualisedRule(const TTime& aTimeOfChange, TInt  aStdOffset, TInt aDstOffset, TTzTimeReference aTimeReference) :

					iTimeOfChange(aTimeOfChange),

					iStdOffset(aStdOffset),

					iDstOffset(aDstOffset),

					iTimeReference(aTimeReference)

	{

	}

inline TTzActualisedRule::TTzActualisedRule() :

					iTimeOfChange(0),

					iStdOffset(0),

					iDstOffset(0),

					iTimeReference(ETzUtcTimeReference)

	{

	}

#endif