/*

* Copyright (c) 2009 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 "cdnsmsgbuf.h"

CDnsMsgBuf::CDnsMsgBuf(const TDesC8& aBuf):iDataLength(aBuf.Size())

	{	

	}

CDnsMsgBuf* CDnsMsgBuf::NewL(const TDesC8& aBuf)

	{

	CDnsMsgBuf* self =  new (ELeave) CDnsMsgBuf(aBuf);	

	CleanupStack::PushL(self);

	self->ConstructL(aBuf);

	CleanupStack::Pop(self);

	return self;

	}	

CDnsMsgBuf::~CDnsMsgBuf()

	{	

	}

void CDnsMsgBuf::ConstructL(const TDesC8& aBuf)

	{

	iPtr = (TUint8*)aBuf.Ptr();

	iIndex = 0;

	}

void CDnsMsgBuf::SetChar(TUint8 aVal)

	{

	*(iPtr+iIndex) = aVal;

	iIndex += sizeof(TUint8);		

	}

void CDnsMsgBuf::SetInt16(TUint16 aVal)

	{

    BigEndian::Put16(iPtr + iIndex, aVal);

    iIndex += sizeof(TUint16);

	}

void CDnsMsgBuf::SetInt32(TUint32 aVal)

	{

	BigEndian::Put32(iPtr + iIndex, aVal);

	iIndex += sizeof(TUint32);		

	}

void CDnsMsgBuf::SetDomainNameL(const TDesC8& aName)

	{	

	RBuf8 name;

    if(aName.LocateReverse('.')== aName.Length()-1)

        {

        name.Create(aName.Left(aName.Length()-1));

        }

    else 

        {

        name.Create(aName);

        }

	CStringParser* strParser =  CStringParser::NewL (name);

	CleanupStack::PushL ( strParser );

	TPtrC8 token;

	TChar ch = '.';

	TUint8 len = 0;

	while(1)

		{

		TBool result = strParser->ParseTill(token,ch);

		len = token.Size();

		SetChar(len);

		for(TInt i = 0; i< len; i++)

			{

			SetChar(token.Ptr()[i]);

			}

		strParser->SkipLength(1);

		if(!result)

			break;

		}

	// append a zero at the end

	SetChar(NULL);

	CleanupStack::PopAndDestroy ( strParser );

	name.Close();

	}

void CDnsMsgBuf::SetText(const TDesC8& aTxt)

	{

	TUint8 len = 0;

    len = aTxt.Size();

	SetChar(len);

	for(TInt i=0; i<len; i++)

		{

		SetChar(aTxt.Ptr()[i]);

		}

	}

void CDnsMsgBuf::SetPtrRdLengthL(const TDesC8& aName)

	{

	TUint16 len = GetDomainLengthL(aName);

	SetInt16(len);

	}

void CDnsMsgBuf::SetSrvRdLengthL(const TDesC8& aName)

	{

	TUint16 len = GetDomainLengthL(aName);

	len += 6;  //sizeof(prio+weight+port)

	SetInt16(len);

	}		

void CDnsMsgBuf::SetTxtRdLength(const RArray<RBuf8>& aTxtList)

	{

	TUint16 len = 0;	

	TInt count = aTxtList.Count();

	for (TInt i=0; i< count; i++)

		{

		len++;

		len += aTxtList[i].Size();  

		}

	SetInt16(len);

	}

TUint16 CDnsMsgBuf::GetDomainLengthL(const TDesC8& aName)const

	{

    RBuf8 name;

    if(aName.LocateReverse('.')== aName.Length()-1)

        {

        name.Create(aName.Left(aName.Length()-1));

        }

    else 

        {

        name.Create(aName);

        }

	CStringParser* strParser =  CStringParser::NewL (name);

	CleanupStack::PushL ( strParser );

	TPtrC8 token;

	TChar ch = '.';

	TUint16 len = 0;	

	while(1)

		{

		TBool result = strParser->ParseTill(token,ch);

		len++;

		len += token.Size();  

		strParser->SkipLength(1);

		if(!result)

			break;

		}		

	len++;   //0 length octet appended at the end

	CleanupStack::PopAndDestroy ( strParser );

	name.Close();

	return len;

	}