/*

 * Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "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: 

 * Implementation for class encoding TInt in ASN1 DER

 *

 */

 #include <asn1enc.h>

 EXPORT_C CASN1EncInt* CASN1EncInt::NewLC(const TInt aInt)

 	{

 	CASN1EncInt* self = new (ELeave) CASN1EncInt(aInt);

 	CleanupStack::PushL(self);

 	self->ConstructL();

 	return self;

 	}

 EXPORT_C CASN1EncInt* CASN1EncInt::NewL(const TInt aInt)

 	{

 	CASN1EncInt* self = NewLC(aInt);

 	CleanupStack::Pop(self);

 	return self;

 	}

 CASN1EncInt::CASN1EncInt(const TInt aInt)

 : CASN1EncPrimitive(EASN1Integer), iInt(aInt)

 	{

 	}

 void CASN1EncInt::CalculateContentsLengthDER()

 	{

 	iContentsLengthDER = 1;

 	// Flip bits in -ve numbers

 	TUint working = iInt < 0 ? ~iInt : iInt;

 	TUint last = working;

 	while (working >>= 8)

 		{

 		last = working;

 		++iContentsLengthDER;

 		}

 	// If most sig non-zero byte had a 1 top bit, we'll need the next byte too

 	// (applies to both +ve and -ve cases)

 	if (last & 0x80)

 		{

 		++iContentsLengthDER;

 		}

 	}

 void CASN1EncInt::WriteContentsDERL(TDes8& aBuf) const

 	{

 	// Unsigned, so operator>>= works sensibly

 	TUint working = iInt;

 	TUint position = iContentsLengthDER;

 	while (position)

 		{

 		// Cast takes least sig 8 bits

 		aBuf[--position] = STATIC_CAST(TUint8, working);

 		working >>= 8;

 		}

 	}