pimappsupport/chinesecalendaralg/originalsrc/Calendar.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 12 Mar 2010 15:42:35 +0200
branchRCL_3
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permissions -rw-r--r--
Revision: 201007 Kit: 201008
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// Copyright (c) 2000-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// Implementation of the TCalendar class.
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// 
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//
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#include <e32def.h>
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#include <e32math.h>
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#include "calconvcalendar.h"
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const TReal KRemainderApproxZero = 0.000000001;
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//
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// Construction/Destruction
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//
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//------------------------------------------------------
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// Class:       TCalendar
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// Function:    TCalendar
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// Arguments:   None
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//
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// Comments:    Constructor
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//
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// Return:      none
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//------------------------------------------------------
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TCalendar::TCalendar()
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	{
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	iJulianDay = 0;
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	}
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//------------------------------------------------------
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// Class:       TCalendar
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// Function:    operator =
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// Arguments:   TCalendar &TCal  -  the TCalendar
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//				class by referance.
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//
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// Comments:    Copies the JulianDay value from one instance 
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//				of TCalendar to an other.
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//
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// Return:      *this
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//------------------------------------------------------
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EXPORT_C TCalendar& TCalendar::operator =(const TCalendar &TCal)
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	{
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	iJulianDay = TCal.iJulianDay;
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	return (*this);
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	}
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EXPORT_C TReal TCalendar::JulianDay()
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	{
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	return iJulianDay;
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	}
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//------------------------------------------------------
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// Class:       TCalendar
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// Function:    Floor
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// Arguments:   TReal& ,TReal& 
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//
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// Comments:    This function returns the floor value of the
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//				value given in the aNum argument as Determined by:
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//
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//				the largest integer less than or equal to aNum
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//
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// Return:      None
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//------------------------------------------------------
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void TCalendar::Floor(TInt& aRes,const TReal& aNum) const
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	{
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	TReal tempReal;
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	TInt32 tempReal32;
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	TInt precision = 0;
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	TReal wholeNoTemp;
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	Math::Frac(wholeNoTemp,aNum);
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	if(wholeNoTemp < 0)
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		{
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		wholeNoTemp = -wholeNoTemp;
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		}
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	if((aNum == 0) || (wholeNoTemp < KRemainderApproxZero))
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		{
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		tempReal = aNum;
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		}
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	else
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		{
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		tempReal = aNum - KCalConvPointFive;
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		}
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	Math::Round(tempReal,tempReal,precision);
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	Math::Int(tempReal32,tempReal);
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	aRes = tempReal32;
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	}
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//------------------------------------------------------
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// Class:       TCalendar
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// Function:    Ceiling
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// Arguments:   TReal& ,TReal& 
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//
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// Comments:    This function returns the ceiling value of the
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//				value given in the aNum argument as Determined by:
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//
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//				the smallest integer less than or equal to aNum
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//
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// Return:      None
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//------------------------------------------------------
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void TCalendar::Ceiling(TInt& aRes,const TReal& aNum) const
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	{
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	TReal tempReal;
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	TInt32 tempReal32;
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	TInt precision = 0;
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	TReal wholeNoTemp;
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	Math::Frac(wholeNoTemp,aNum);
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	if(wholeNoTemp < 0)
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		{
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		wholeNoTemp = -wholeNoTemp;
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		}
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	if((aNum == 0) || (wholeNoTemp < KRemainderApproxZero))
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		{
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		tempReal = aNum;
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		}
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	else
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		{
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		tempReal = aNum + KCalConvPointFive;
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		}
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	Math::Round(tempReal,tempReal,precision);
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	Math::Int(tempReal32,tempReal);
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	aRes = tempReal32;
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	}
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//------------------------------------------------------
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// Class:       TCalendar
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// Function:    Mod
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// Arguments:   TReal &, const TReal &, const TReal &
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//
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// Comments:    return the mod of the aAbscissa / aDenominator
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//				quotient as Determined by:
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//				
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//				aAbscissa - aDenominator(floor(aAbscissa / aDenominator))
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//
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// Return:      None
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//------------------------------------------------------
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void TCalendar::Mod(TReal &aRes, const TReal &aAbscissa, const TReal &aDenominator) const
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	{
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	TReal quo;
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	TInt tempInt;
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	quo = aAbscissa / aDenominator;
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	Floor(tempInt,quo);
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	aRes = aAbscissa - (aDenominator * tempInt);
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	}
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//------------------------------------------------------
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// Class:       TCalendar
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// Function:    Amod
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// Arguments:   TReal &, const TReal &, const TReal &
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//
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// Comments:    Determines the adjusted remainder
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//
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// Return:      None
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//------------------------------------------------------
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void TCalendar::Amod(TReal &aRes, const TReal &aAbscissa, const TReal &aDenominator) const
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	{
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	Mod(aRes,aAbscissa,aDenominator);
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	if(aRes == 0)
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		{
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		aRes = aDenominator;
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		}
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	}
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//------------------------------------------------------
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// Class:       TCalendar
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// Function:    Round
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// Arguments:   TInt &, TReal &
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//
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// Comments:    rounds of the aNum argument
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//
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// Return:      None
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//------------------------------------------------------
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void TCalendar::Round(TInt &aRes, TReal &aNum) const
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	{
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	TReal temp;
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	temp = aNum + 0.5;
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	Floor(aRes,temp);
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	}