/*

* Copyright (c) 2008 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 "mceloglineparser.h"

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

// TMceLogLineParser::TMceLogLineParser

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

//

TMceLogLineParser::TMceLogLineParser(

    const TDesC8& aMessage,

    TUint aMaxLineLength)

 : iMaxLineLength(aMaxLineLength),

   iMessage(aMessage),

   iCurrentPos(0)

	{

	}

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

// TMceLogLineParser::End

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

//

TBool TMceLogLineParser::End()

	{

	return (iCurrentPos >= iMessage.Length());

	}

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

// TMceLogLineParser::GetLine

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

//

TPtrC8 TMceLogLineParser::GetLine()

	{

	if (End())

	    {

	    return TPtrC8();

	    }

    TPtrC8 ptr(iMessage.Mid(iCurrentPos));

    TUint lineEndOffset = 0;

    TInt nextLineEndPos = FindNextLineEndPos(ptr,lineEndOffset);

    TUint length;

    if (nextLineEndPos == KErrNotFound)

		{

        if (ptr.Length() < iMaxLineLength) 

			{

            length = ptr.Length();

			}

        else

			{

            length = iMaxLineLength;

			}

		}

    else

		{

        if (nextLineEndPos <= iMaxLineLength)

			{

            length = nextLineEndPos;

            iCurrentPos += lineEndOffset;

			}

        else

			{

            length = iMaxLineLength;

			}

		}

    iCurrentPos += length;

    return ptr.Left(length);

	}

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

// TMceLogLineParser::FindNextLineEndPos

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

//

TInt TMceLogLineParser::FindNextLineEndPos(

    const TDesC8& aDes,

    TUint& aLineEndOffset)

	{

    TInt crPos = aDes.Locate ('\r');

    TInt lfPos = aDes.Locate ('\n');

    TInt pos = KErrNotFound;

    if (!(crPos == KErrNotFound))

		{

        aLineEndOffset = 1;

        if (!(lfPos == KErrNotFound))

			{

            if (crPos < lfPos)

				{

                if (crPos+1 == lfPos) aLineEndOffset = 2;

                pos = crPos;

				}

            else

				{

                pos = lfPos;

				}

			}

        else

			{

            pos = crPos;

			}

		}

    else

		{

        if (!(lfPos == KErrNotFound))

			{

            aLineEndOffset = 1;

            pos = lfPos;

			}

		}

    return pos;

	}