// Copyright (c) 2002-2009 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:
// Name          : TSIPLogLineParser.cpp
// Part of       : Logging
// Version       : SIP/2.0 
//




#include "TSIPLogLineParser.h"

// -----------------------------------------------------------------------------
// TSIPLogLineParser::TSIPLogLineParser
// -----------------------------------------------------------------------------
//
TSIPLogLineParser::TSIPLogLineParser (const TDesC8& aMessage,
									  TUint aMaxLineLength)
 : iMaxLineLength(aMaxLineLength),
   iMessage(aMessage),
   iCurrentPos(0)
	{
	}

// -----------------------------------------------------------------------------
// TSIPLogLineParser::End
// -----------------------------------------------------------------------------
//
TBool TSIPLogLineParser::End ()
	{
	return (iCurrentPos >= iMessage.Length());
	}

// -----------------------------------------------------------------------------
// TSIPLogLineParser::GetLine
// -----------------------------------------------------------------------------
//
TPtrC8 TSIPLogLineParser::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);
	}

// -----------------------------------------------------------------------------
// TSIPLogLineParser::FindNextLineEndPos
// -----------------------------------------------------------------------------
//
TInt TSIPLogLineParser::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;
	}