/*

* 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: 

*

*/

// INCLUDE FILES

#include    "TCMSTimeUtil.h"

#include 	<asn1dec.h>

// CONSTANTS

// UTC formatting string

_LIT( KUTCFormatString, "%*Y%3%M%2%D%1%H%T%SZ" );

const TUint8 KFormatLength = 13;

// ============================ MEMBER FUNCTIONS ===============================

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

// TCMSTimeUtil::ConvertToEncoderLC

// Converts TTime to ASN encoder base

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

//

CASN1EncBase* TCMSTimeUtil::ConvertToEncoderLC( const TTime& aTime )

    {

	CASN1EncBase* time = NULL;

	//    Dates between 1 January 1950 and 31 December 2049 (inclusive) must be

	//    encoded as UTCTime.  Any dates with year values before 1950 or after

	//    2049 must be encoded as GeneralizedTime.

	if( aTime.DateTime().Year() >= 1950 &&

		aTime.DateTime().Year() <= 2049 )

		{

		TBuf<KFormatLength> dateString;

		// Formatting for UTC time

		aTime.FormatL( dateString, KUTCFormatString );

		TBuf8<KFormatLength> timeDes;

		timeDes.Copy( dateString );

		time = CASN1EncOctetString::NewLC( timeDes );

		// change type to UTCTime

		time->SetTag( EASN1UTCTime, EUniversal );

		}

	else

		{

		time = CASN1EncGeneralizedTime::NewLC( aTime );

		}

	return time;

    }

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

// TCMSTimeUtil::ConvertToTimeL

// Converts DER encoded source to TTime

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

//

TTime TCMSTimeUtil::ConvertToTimeL( const TDesC8& aSource )

	{

	TASN1DecGeneric time( aSource );

	time.InitL();

	TTime returnValue = 0;

	if( time.Tag() == EASN1GeneralizedTime )

		{

		TASN1DecGeneralizedTime genTime;

		returnValue = genTime.DecodeDERL( time );

		}

	else if( time.Tag() == EASN1UTCTime )

		{

		TASN1DecUTCTime utcTime;

		returnValue = utcTime.DecodeDERL( time );

		}

	else

		{

		User::Leave( KErrArgument );

		}

	return returnValue;

	}

//  End of File