/*

 * 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