/*

* Copyright (c) 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:

*

*/

using System;

namespace SymbianUtils

{

	public static class PrefixParser

	{

		public static long SkipPrefixAndReadLong( string aPrefix, ref string aLine )

		{

			long ret = 0;

			//

			if	( aLine.IndexOf( aPrefix ) >= 0 )

			{

				SkipPrefix( aPrefix, ref aLine );

				ret = ReadLong( ref aLine );

			}

			//

			return ret;

		}

		public static long SkipPrefixAndReadLongHex( string aPrefix, ref string aLine )

		{

			long ret = 0;

			//

			if	( aLine.IndexOf( aPrefix ) >= 0 )

			{

				SkipPrefix( aPrefix, ref aLine );

				ret = ReadLongHex( ref aLine );

			}

			//

			return ret;

		}

		public static int SkipPrefixAndReadInt( string aPrefix, ref string aLine )

		{

			int ret = 0;

			//

			if	( aLine.IndexOf( aPrefix ) >= 0 )

			{

				SkipPrefix( aPrefix, ref aLine );

				ret = (int) ReadLong( ref aLine );

			}

			//

			return ret;

		}

		public static uint SkipPrefixAndReadUint( string aPrefix, ref string aLine )

		{

			uint ret = 0;

			//

			if	( aLine.IndexOf( aPrefix ) >= 0 )

			{

				SkipPrefix( aPrefix, ref aLine );

				ret = (uint) ReadLong( ref aLine );

			}

			//

			return ret;

		}

		public static bool SkipPrefixAndReadBool( string aPrefix, ref string aLine )

		{

			bool ret = false;

			//

			if	( aLine.IndexOf( aPrefix ) >= 0 )

			{

				SkipPrefix( aPrefix, ref aLine );

				ret = ReadBool( ref aLine );

			}

			//

			return ret;

		}

		public static void SkipPrefix( string aPrefix, ref string aLine )

		{

			int index = aLine.IndexOf( aPrefix );

			if	( index >= 0 )

				aLine = aLine.Substring( index + aPrefix.Length );

			aLine = aLine.Trim();

		}

		public static uint ReadUint( ref string aLine )

		{

            uint retUint = 0;

			long retLong = 0;

			SymbianUtils.NumberBaseUtils.TNumberBase numberBase;

			string discardedText;

            bool convertedOkay = SymbianUtils.NumberBaseUtils.TryTextToDecimalNumber( ref aLine, out discardedText, out retLong, out numberBase );

            if ( convertedOkay )

            {

                try

                {

                    retUint = System.Convert.ToUInt32( retLong );

                }

                catch ( OverflowException )

                {

                }

            }

            //

            return retUint;

		}

		public static int ReadInt( ref string aLine )

		{

            int retInt = 0;

			long retLong = 0;

			SymbianUtils.NumberBaseUtils.TNumberBase numberBase;

			string discardedText;

            bool convertedOkay = SymbianUtils.NumberBaseUtils.TryTextToDecimalNumber( ref aLine, out discardedText, out retLong, out numberBase );

            if ( convertedOkay )

            {

                try

                {

                    retInt = System.Convert.ToInt32( retLong );

                }

                catch ( OverflowException )

                {

                }

            }

            //

            return retInt;

		}

		public static long ReadLong( ref string aLine )

		{

			long ret = -1;

			SymbianUtils.NumberBaseUtils.TNumberBase numberBase;

			string discardedText;

			bool convertedOkay = SymbianUtils.NumberBaseUtils.TryTextToDecimalNumber( ref aLine, out discardedText, out ret, out numberBase );

			return ret;

		}

		public static long ReadLongHex( ref string aLine )

		{

			long ret = 0;

			string discardedText;

			bool convertedOkay = SymbianUtils.NumberBaseUtils.TryTextToDecimalNumber( ref aLine, out discardedText, out ret, SymbianUtils.NumberBaseUtils.TNumberBase.EHex );

			return ret;

		}

		public static bool ReadBool( ref string aLine )

		{

            bool ret = false;

            // Trim the start of the line

			aLine = aLine.TrimStart();

            string upperLine = aLine.ToUpper();

            //

            if ( upperLine == "YES" || upperLine == "TRUE" || upperLine == "1" )

            {

                ret = true;

            }

            else if ( upperLine == "NO" || upperLine == "FALSE" || upperLine == "0" )

            {

                ret = false;

            }

            else

            {

                int endIndex = 0;

                bool continueSearchingForEndIndex = true;

                for ( int i = 0; i < aLine.Length && continueSearchingForEndIndex; i++ )

                {

                    char character = aLine[ i ];

                    switch ( character )

                    {

                    case '1':

                    case '0':

                        ++endIndex;

                        break;

                    default:

                        continueSearchingForEndIndex = false;

                        break;

                    }

                }

                string boolAsString = aLine.Substring( 0, endIndex );

                //

                try

                {

                    int boolAsInt = System.Convert.ToInt32( boolAsString );

                    ret = ( boolAsInt > 0 );

                    aLine = aLine.Substring( endIndex );

                }

                catch ( Exception )

                {

                }

            }

			//

			return ret;

		}	

	}

}