/*

* Copyright (c) 2009-2010 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:

* MSRP Implementation

*

*/

// CLASS HEADER

#include "TMSRPHeaderUtil.h"

// INTERNAL INCLUDES

#include "MsrpCommon.h"

#include "CMSRPByteRangeHeader.h"

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

// TMSRPHeaderUtil::ConvertToNumberL

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

//

TInt TMSRPHeaderUtil::ConvertToNumber( const TDesC8& aString )

    {

	// checking for special characters:

	// Unknown byte range end

	if ( aString == KAsterisk )

		{

		// Range unknown

		return KUnknownRange;

		}

	TLex8 numberToConvert( aString );

	TInt convertedNumber( 0 );

	numberToConvert.Val( convertedNumber );

	return convertedNumber;

	}

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

// TMSRPHeaderUtil::AppendStringL

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

//

void TMSRPHeaderUtil::AppendStringL( const TDesC8& aString, TDes8& aDest )

	{

	TInt newLength = aString.Length() + aDest.Length();

	if ( newLength > aDest.MaxLength() )

		{

		// not enough room

		User::Leave( KErrArgument );

		}

	aDest.Append( aString );

	}

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

// TMSRPHeaderUtil::CheckStringValidity

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

//

TBool TMSRPHeaderUtil::CheckStringValidity( const TDesC8& aString )

	{

	if ( !aString.Length() )

		{

		return EFalse;

		}

	// Checks the syntax for the Content-Type string only. May need to extend to other headers as well

	TChar charToFind( KDividedCharacter );

	TInt matchLoc = aString.Locate( charToFind );

	if( matchLoc == KErrNotFound || matchLoc == (aString.Length() -1) )

	    {

        return EFalse;

	    }

	TPtrC8 typePtr = aString.Left(matchLoc);

	TLex8 lex( typePtr );

	TChar chr = lex.Get();

	while ( chr )

		{

		if ( !chr.IsAlphaDigit() && chr != '!' && chr != '#' && chr != '$' && chr != '%' && chr != '&' &&

		      chr != '\'' && chr != '*' && chr != '+' && chr != '-' && chr != '.' && chr != '^' && 

		      chr != '_' && chr != '`' && chr != '{' && chr != '|' && chr != '}' && chr != '~' )

			{

			return EFalse;

			}

		chr = lex.Get();

		}

	TPtrC8 subtypePtr = aString.Mid( matchLoc+1 );

	lex.Assign( subtypePtr );

	chr = lex.Get();

	while ( chr )

        {

        if ( !chr.IsAlphaDigit() && chr != '!' && chr != '#' && chr != '$' && chr != '%' && chr != '&' &&

              chr != '\'' && chr != '*' && chr != '+' && chr != '-' && chr != '.' && chr != '^' && 

              chr != '_' && chr != '`' && chr != '{' && chr != '|' && chr != '}' && chr != '~' )

            {

            return EFalse;

            }

        chr = lex.Get();

        }

	return ETrue;

	}

// End of File