// Copyright (c) 2000-2009 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 __ASTRONOMICALCAL_H__

#define __ASTRONOMICALCAL_H__

#include <e32std.h>

#include <e32base.h>

#include "calconvcalendar.h"

const TInt KCalConvFirstDay = 1;

const TReal KMeanSynodicMonth = 29.530588853;

class TAstronomicalCalendar : public TCalendar  

	{

public:

	TAstronomicalCalendar();

protected:

	void  AdjustJDFromNoon(TReal& aJulianDay) const;

	void  AdjustJDToNoon(TReal& aJulianDay) const;

	TReal NewMoonAtOrAfter(const TReal& aJulianDay) const;

	void  EphemerisCorrection(const TReal aJulianDay, TReal& emphCorr) const;

	TReal LocalFromUniversal(const TReal& aTime, const TReal& aZone) const;

	TReal UniversalFromLocal(const TReal& aTime, const TReal& aZone) const;

	TReal DateNextSolarLongitude(const TReal& aJulianDay, const TReal& aDegrees) const;

	void  SolarLongitude(const TReal& aJulianDay, TReal& aTheta) const;

	void  JulianCenturies(const TReal& aJulianDay, TReal& aJC) const;

	void  EphemerisFromUniversal(const TReal& aJulianDay, TReal& aCorrectedJD) const;

	TReal UniversalFromEphemeris(const TReal& aJulianDay) const;

	void  EphemerisCorrPopX(const TInt aYear, TReal& aEmphCorr) const;

	TReal NewMoonBefore(const TReal& aJulianDay) const;

private:

	TReal NewMoonTime(TInt aTime) const;

	void  GetLongitude(const TReal& aC, TReal& aLongitude) const;

	void  Aberration(const TReal& aJulianCenturies, TReal& aAberration) const;

	void  Nutation(const TReal& aJulianCenturies, TReal& aNutation) const;

	void  j2000(TReal& aJ2000) const;

	void  GetPoly(const TReal* aArray, const TReal& aOperand, TInt aCount, TReal& aResult) const;

	void  PopulateTheta(TReal& aTheta, TInt aYear) const;

	};

#endif