/*

* Copyright (c) 2002 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: CMSPUtil Implementation

*

*

*/

//  INCLUDE FILES

#include <e32std.h>

#include "MSPPanic.hrh"

#include "msputil.h"

// ---------------------------------------------------------------------------

CMSPUtil* CMSPUtil::NewL( CDesCArrayFlat* aArray )

	{

	__ASSERT_DEBUG( aArray,

					User::Panic( KPanicMSP, EInvalidParameter ) );

	CMSPUtil* self = new( ELeave ) CMSPUtil;

	self->iUnitArray = aArray;

	return self;

	}

// ---------------------------------------------------------------------------

CMSPUtil::~CMSPUtil( )

	{

	if( iUnitArray )

	    {

	    iUnitArray->Delete( 0, iUnitArray->Count( ) );

	    }

	delete iUnitArray;

	}

// ---------------------------------------------------------------------------

CMSPUtil::CMSPUtil( ): iUnitArray( NULL )

	{

	}

// ---------------------------------------------------------------------------

void CMSPUtil::SolveUnitAndSize( TInt64& aNumber, TInt& aUnit )

	{

	TInt count( iUnitArray->Count( ) );

	const TInt KMaxDigits = 10000;

	const TInt KKiloByte = 1024;

	const TInt KRoundLimit = 512;

	const TInt KShiftValue = 10;

	aUnit = EByte;

	// If number is 1024 or more, it can be divided and unit changed

	while( aNumber >= 1024 && (aUnit + 1) < count )

		{

		// Show kilobytes and megabytes with 4 digits

		if( ( aUnit == EKiloByte || aUnit == EMegaByte ) && aNumber < KMaxDigits )

			{

			break;

			}

		// Check how the rounding should be done

		if( aNumber % KKiloByte < KRoundLimit )

			{

			// Round downwards

			aNumber >>= KShiftValue;	// 2^10 = 1024

			}

		else

			{

			aNumber = ( aNumber >> KShiftValue ) + 1;

			}

		aUnit++;		// Next enum

		}

	}

// ---------------------------------------------------------------------------

EXPORT_C TPtrC CMSPUtil::SolveUnitAndSize( TInt64& aNumber )

	{

	TInt unitType( EByte );

	SolveUnitAndSize( aNumber, unitType );

    if( unitType >= iUnitArray->Count() )

        {

        if( iUnitArray->Count() )

            {

            unitType = iUnitArray->Count() - 1;

            }

        else

            {

            unitType = 0;

            }

        }

	return ( *iUnitArray )[ unitType ];

	}

// End of File