/*

* Copyright (c) 2005-2009 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: 

*

*/

/**

 @file

*/

#include <e32std.h>

#include <e32def.h>

#include <asn1enc.h>

#include <asn1dec.h>

EXPORT_C CASN1EncEncoding::~CASN1EncEncoding()

	{

	delete iContents;

	}

// Set arbitrary initial values for tag type and class because they will be 

// inited in ConstructL().

EXPORT_C CASN1EncEncoding::CASN1EncEncoding() : 

	CASN1EncBase(EASN1EOC, EUniversal)

	{

	}

EXPORT_C CASN1EncEncoding* CASN1EncEncoding::NewLC(const TDesC8& aEncoding)

	{

	CASN1EncEncoding* self = new (ELeave) CASN1EncEncoding;

	CleanupStack::PushL(self);

	self->ConstructL(aEncoding);

	return self;

	}

EXPORT_C CASN1EncEncoding* CASN1EncEncoding::NewL(const TDesC8& aEncoding)

	{

	CASN1EncEncoding* self = NewLC(aEncoding);

	CleanupStack::Pop(self);

	return self;

	}

EXPORT_C CASN1EncEncoding* CASN1EncEncoding::NewLC(const TDesC8& aEncoding, TTagType aType, TASN1Class aClass)

	{

	CASN1EncEncoding* self = new (ELeave) CASN1EncEncoding;

	CleanupStack::PushL(self);

	self->ConstructL(aEncoding, aType, aClass);

	return self;		

	}

void CASN1EncEncoding::ConstructL(const TDesC8& aEncoding)

	{

	// Use decoder to get information about the outer wrapper of the passed 

	// encoding.

	TASN1DecGeneric decoder(aEncoding);

	decoder.InitL();

	iClass = decoder.Class();

	iTag = decoder.Tag();

	// Set this information so that the base class knows how to write 

	// DER encoding.

	SetTag(iTag, iClass);

	// Copy just the contents of the passed encoding.

	iContents = decoder.GetContentDER().AllocL();

	// Save this for base class writing functions.

	iContentsLengthDER = iContents->Length();

	// This is base class' method which initializes length of length 

	// encoding for proper DER writing.

	CalculateLengthLengthDER();

	}

void CASN1EncEncoding::ConstructL(const TDesC8& aEncoding, TTagType aType, TASN1Class aClass)

	{

	// Use decoder to get information about the outer wrapper of the passed 

	// encoding.

	TASN1DecGeneric decoder(aEncoding);

	decoder.InitL();

	iClass = aClass;

	iTag = aType;

	// Set this information so that the base class knows how to write 

	// DER encoding.

	SetTag(aType, aClass);

	// Copy just the contents of the passed encoding.

	iContents = decoder.GetContentDER().AllocL();

	// Save this for base class writing functions.

	iContentsLengthDER = iContents->Length();

	// This is base class' method which initializes length of length 

	// encoding for proper DER writing.

	CalculateLengthLengthDER();

	}

// This method is not called but is necessary because it overrides a 

// pure virtual function of the base class. The variable is properly 

// initialized in ConstructL().

void CASN1EncEncoding::CalculateContentsLengthDER()

	{

	iContentsLengthDER = iContents->Length();

	}

TBool CASN1EncEncoding::IsConstructed() const

	{

	return ETrue;

	}

// When this method is called by the base class write helper, the tag 

// and length are already written.

void CASN1EncEncoding::WriteContentsDERL(TDes8& aBuf) const

	{

	aBuf.Copy(*iContents);

	}