/*

* Copyright (c) 2008-2009 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: 

* Contains miscellaneous utility functions that can be used by any code in security component

*

*/

/**

 @file

*/

#include "miscutil.h"

namespace MiscUtil

{

/*

 * Function used to extract lines of text from a buffer. Note that this only works for non-unicode text. It skips

 * over blank lines and the characters '\n' or '\r' are treated as end-of-line markers.

 *

 * @param aBuffer		Input buffer

 * @param aPos		Starting index into aBuffer

 * @return			ETrue if a line was successfully extracted from the buffer, EFalse if end of buffer reached

 */

EXPORT_C TBool ReadNonEmptyLineL(const TDesC8& aBuffer, TInt& aPos, TPtrC8& aLine)

	{

	TBool lineIdentified = ETrue;

	aLine.Set(NULL, 0);

	TInt bufferLength = aBuffer.Length();

	__ASSERT_ALWAYS(aPos >=0 && aPos <= bufferLength, User::Leave(KErrArgument));

	// Skip blank lines

	while (aPos < bufferLength)

		{

		TChar  c = aBuffer[aPos];

		if (c != '\r' && c != '\n')

			{

			break;

			}

		aPos++;

		}

	// Find the position of the next delimter

	TInt endPos = aPos;

	while (endPos < bufferLength)

		{

		TChar c = aBuffer[endPos];

		if (c == '\n' || c == '\r') 	// Find end of line

			{

			break;

			}

		endPos++;

		}

	if (endPos != aPos)

		{

		TInt tokenLen = endPos - aPos;

		aLine.Set(&aBuffer[aPos], tokenLen);

		}

	else

		{

		lineIdentified = EFalse; // End of buffer

		}

	aPos = endPos;

	return lineIdentified;

	}

/*

 * Recursively deletes all folders in the path (as long as they are empty)

 *

 * @param aFs		Connected  filesystem session

 * @param aPath		Fully qualified path to start the recursive delete

 */

EXPORT_C void DeletePathIfEmpty(RFs& aFs, const TDesC& aPath)

	{

	TParse path;

	path.Set(aPath,NULL,NULL);

	if (path.PathPresent())

		{

		while ((aFs.RmDir(path.DriveAndPath()) == KErrNone) && (path.PopDir() == KErrNone))

			;

		}		

	}

}	// namespace MiscUtil