/*

* 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: 

*

*/

#include <e32std.h>

#include "FLDSTD.H"

#include "FLDNUMS.H"

LOCAL_D const TInt sDeneryArray[13] = {  1000, 900,  500, 400, 100, 90,  50, 40,  10, 9,   5,  4,   1  };

LOCAL_D const TText* const LsRomanArray[13] = { _S("M"),  _S("CM"), _S("D"), _S("CD"),_S("C"), _S("XC"),_S("L"),_S("XL"),_S("X"),_S("IX"),_S("V"),_S("IV"),_S("I") };

//////////////////////////////

// TDeneryToCharBase

//////////////////////////////

EXPORT_C TInt TDeneryToCharBase::DeneryToChar(TPtr& aValueText,TInt aDenary)const

// if aValueText is big enough to hold the result then the Roman Numeral representation of aDenery is inserted

// else the required size of aValueText is returned

//

	{

	aValueText.SetLength(0);

	TInt numChars = NumChars(aDenary);

	if (aValueText.MaxLength() < numChars)

		return numChars;

	else 

		{

		DoDeneryToChar(aValueText,aDenary);

		return KErrNone;

		}

	}

//////////////////////////////

// TRomanNumeral

//////////////////////////////

EXPORT_C TInt TRomanNumeral::NumChars(TInt aDenery)const

// returns the number of characters in a given "roman number"

//

	{

	TInt numChars=0;

	TInt i=0;

	while (aDenery > 0)

		{

		if (sDeneryArray[i] <= aDenery)

			{

			numChars += _L(sRomanArray[i]).Length();

			aDenery -= sDeneryArray[i];

			}

		else

			i++;

		}

	return numChars;

	}

EXPORT_C void TRomanNumeral::DoDeneryToChar(TPtr& aValueText,TInt aDenery)const

// sets aValueText to the Roman Numeral representation of aDenery

//

	{

	aValueText.SetLength(0);

	TInt i=0;

	while (aDenery > 0)

		{

		if (sDeneryArray[i] <= aDenery)

			{

			aValueText.Append(_L(sRomanArray[i]));

			aDenery -= sDeneryArray[i];

			}

		else

			i++;

		}

	}

/////////////////////////

// TArabicNumeral

/////////////////////////

EXPORT_C TInt TArabicNumeral::NumChars(TInt aNum)const

// returns num digits in an integer (including sign bit if negative)

//

	{

	TInt chars=1;

	if (aNum<0)

		{

		chars++;

		aNum = aNum*(-1);

		}

	while (aNum>=10)

		{

		aNum = aNum/10;

		chars++;

		}

	return chars;

	}

EXPORT_C void TArabicNumeral::DoDeneryToChar(TPtr& aValueText,TInt aDenery)const

	{

	aValueText.Num(aDenery);

	}

/////////////////////////

// TAlphabeticNumeral

/////////////////////////

EXPORT_C TInt TAlphabeticNumeral::NumChars(TInt aNum)const

// returns num digits in an integer (including sign bit if negative)

//

	{

	TInt chars=1;

	if (aNum<0)

		{

		chars++;

		aNum = aNum*(-1);

		}

	while (aNum>26)

		{

		aNum = aNum/26;

		chars++;

		}

	return chars;

	}

EXPORT_C void TAlphabeticNumeral::DoDeneryToChar(TPtr& aValueText,TInt aDenery)const

	{

	TInt digit=0;

	while (aDenery>0)

		{

		digit = aDenery%26; // remainder gives least significant figure

		PropendDigitAsChar(aValueText,digit);

		aDenery -= digit;

		aDenery = aDenery/26;

		}

	}

void TAlphabeticNumeral::PropendDigitAsChar(TPtr& aValueText,TInt aDigit)const

	{

	__ASSERT_ALWAYS(aDigit>0,Panic(ECharOutOfRange));

	__ASSERT_ALWAYS(aDigit<27,Panic(ECharOutOfRange));

	__ASSERT_ALWAYS(aValueText.Length()<aValueText.MaxLength(),Panic(EBufferFull));

	TBuf<1> buf;

	buf.Append(TChar(aDigit+64));

	aValueText.Insert(0,buf); // insert at position zero, ie propend

	}