sl@0: /*
sl@0: * Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: * All rights reserved.
sl@0: * This component and the accompanying materials are made available
sl@0: * under the terms of "Eclipse Public License v1.0"
sl@0: * which accompanies this distribution, and is available
sl@0: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: *
sl@0: * Initial Contributors:
sl@0: * Nokia Corporation - initial contribution.
sl@0: *
sl@0: * Contributors:
sl@0: *
sl@0: * Description: 
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: #include <e32std.h>
sl@0: #include "FLDSTD.H"
sl@0: 
sl@0: #include "FLDNUMS.H"
sl@0: 
sl@0: LOCAL_D const TInt sDeneryArray[13] = {  1000, 900,  500, 400, 100, 90,  50, 40,  10, 9,   5,  4,   1  };
sl@0: 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") };
sl@0: 
sl@0: //////////////////////////////
sl@0: // TDeneryToCharBase
sl@0: //////////////////////////////
sl@0: 
sl@0: EXPORT_C TInt TDeneryToCharBase::DeneryToChar(TPtr& aValueText,TInt aDenary)const
sl@0: // if aValueText is big enough to hold the result then the Roman Numeral representation of aDenery is inserted
sl@0: // else the required size of aValueText is returned
sl@0: //
sl@0: 	{
sl@0: 	aValueText.SetLength(0);
sl@0: 	TInt numChars = NumChars(aDenary);
sl@0: 	if (aValueText.MaxLength() < numChars)
sl@0: 		return numChars;
sl@0: 	else 
sl@0: 		{
sl@0: 		DoDeneryToChar(aValueText,aDenary);
sl@0: 		return KErrNone;
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: 
sl@0: //////////////////////////////
sl@0: // TRomanNumeral
sl@0: //////////////////////////////
sl@0: 
sl@0: EXPORT_C TInt TRomanNumeral::NumChars(TInt aDenery)const
sl@0: // returns the number of characters in a given "roman number"
sl@0: //
sl@0: 	{
sl@0: 	TInt numChars=0;
sl@0: 	TInt i=0;
sl@0: 
sl@0: 	while (aDenery > 0)
sl@0: 		{
sl@0: 		if (sDeneryArray[i] <= aDenery)
sl@0: 			{
sl@0: 			numChars += _L(sRomanArray[i]).Length();
sl@0: 			aDenery -= sDeneryArray[i];
sl@0: 			}
sl@0: 		else
sl@0: 			i++;
sl@0: 		}
sl@0: 
sl@0: 	return numChars;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: EXPORT_C void TRomanNumeral::DoDeneryToChar(TPtr& aValueText,TInt aDenery)const
sl@0: // sets aValueText to the Roman Numeral representation of aDenery
sl@0: //
sl@0: 	{
sl@0: 	aValueText.SetLength(0);
sl@0: 	TInt i=0;
sl@0: 
sl@0: 	while (aDenery > 0)
sl@0: 		{
sl@0: 		if (sDeneryArray[i] <= aDenery)
sl@0: 			{
sl@0: 			aValueText.Append(_L(sRomanArray[i]));
sl@0: 			aDenery -= sDeneryArray[i];
sl@0: 			}
sl@0: 		else
sl@0: 			i++;
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: 
sl@0: /////////////////////////
sl@0: // TArabicNumeral
sl@0: /////////////////////////
sl@0: 
sl@0: EXPORT_C TInt TArabicNumeral::NumChars(TInt aNum)const
sl@0: // returns num digits in an integer (including sign bit if negative)
sl@0: //
sl@0: 	{
sl@0: 	TInt chars=1;
sl@0: 	if (aNum<0)
sl@0: 		{
sl@0: 		chars++;
sl@0: 		aNum = aNum*(-1);
sl@0: 		}
sl@0: 	while (aNum>=10)
sl@0: 		{
sl@0: 		aNum = aNum/10;
sl@0: 		chars++;
sl@0: 		}
sl@0: 	return chars;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: EXPORT_C void TArabicNumeral::DoDeneryToChar(TPtr& aValueText,TInt aDenery)const
sl@0: 	{
sl@0: 	aValueText.Num(aDenery);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: /////////////////////////
sl@0: // TAlphabeticNumeral
sl@0: /////////////////////////
sl@0: 
sl@0: EXPORT_C TInt TAlphabeticNumeral::NumChars(TInt aNum)const
sl@0: // returns num digits in an integer (including sign bit if negative)
sl@0: //
sl@0: 	{
sl@0: 	TInt chars=1;
sl@0: 	if (aNum<0)
sl@0: 		{
sl@0: 		chars++;
sl@0: 		aNum = aNum*(-1);
sl@0: 		}
sl@0: 	while (aNum>26)
sl@0: 		{
sl@0: 		aNum = aNum/26;
sl@0: 		chars++;
sl@0: 		}
sl@0: 	return chars;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: EXPORT_C void TAlphabeticNumeral::DoDeneryToChar(TPtr& aValueText,TInt aDenery)const
sl@0: 	{
sl@0: 	TInt digit=0;
sl@0: 	while (aDenery>0)
sl@0: 		{
sl@0: 		digit = aDenery%26; // remainder gives least significant figure
sl@0: 		PropendDigitAsChar(aValueText,digit);
sl@0: 		aDenery -= digit;
sl@0: 		aDenery = aDenery/26;
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: 
sl@0: void TAlphabeticNumeral::PropendDigitAsChar(TPtr& aValueText,TInt aDigit)const
sl@0: 	{
sl@0: 	__ASSERT_ALWAYS(aDigit>0,Panic(ECharOutOfRange));
sl@0: 	__ASSERT_ALWAYS(aDigit<27,Panic(ECharOutOfRange));
sl@0: 	__ASSERT_ALWAYS(aValueText.Length()<aValueText.MaxLength(),Panic(EBufferFull));
sl@0: 
sl@0: 	TBuf<1> buf;
sl@0: 	buf.Append(TChar(aDigit+64));
sl@0: 	aValueText.Insert(0,buf); // insert at position zero, ie propend
sl@0: 	}
sl@0: 
sl@0: