#define TRACK_INTERNING_STATISTICS

/*

* 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;

using System.Collections;

using System.Text;

using System.Text.RegularExpressions;

using System.ComponentModel;

using SymbianUtils.Range;

using SymbianUtils.Strings;

using SymbianStructuresLib.Arm;

using SymbianStructuresLib.MemoryModel;

using SymbianStructuresLib.Debug.Symbols.Constants;

using SymbianStructuresLib.Debug.Common.Id;

namespace SymbianStructuresLib.Debug.Symbols

{

	internal class InternedName

    {

        #region Static constructors

        public static InternedName NewExplicit( string aText )

        {

            InternedName ret = new InternedName( aText, string.Empty );

            return ret;

        }

        public static InternedName New( string aText )

        {

            InternedName ret = new InternedName( aText );

            return ret;

        }

        #endregion

        #region Constructors

        private InternedName( string aName )

        {

            int doubleColonPos = aName.LastIndexOf( "::" );

            if ( doubleColonPos > 0 )

            {

                iNamePart1 = aName.Substring( 0, doubleColonPos + 2 );

                iNamePart2 = aName.Substring( doubleColonPos + 2 );

            }

            else if ( aName.Contains( "typeinfo for " ) )

            {

                iNamePart1 = "typeinfo for ";

                iNamePart2 = aName.Substring( 13 );

            }

            else if ( aName.Contains( "vtable for " ) )

            {

                iNamePart1 = "vtable for ";

                iNamePart2 = aName.Substring( 11 );

            }

            else

            {

                iNamePart1 = aName;

                iNamePart2 = string.Empty;

            }

            // Record intern stats

#if TRACK_INTERNING_STATISTICS

            UpdateStatistics();

#endif

            // Now get the interned strings

            iNamePart1 = string.Intern( iNamePart1 );

            iNamePart2 = string.Intern( iNamePart2 );

        }

        private InternedName( string aPart1, string aPart2 )

        {

            iNamePart1 = string.Intern( aPart1 );

            iNamePart2 = string.Intern( aPart2 );

        }

        #endregion

        #region API

        public static bool IsFunction( string aText )

        {

            bool ret = aText.Contains( "(" ) && aText.Contains( ")" );

            return ret;

        }

        public static bool IsVTable( string aText )

        {

            bool ret = StringUtils.StartsWithAny( SymbolConstants.KVTableOrTypeInfoPrefixes, aText );

            return ret;

        }

        public static bool IsReadOnly( string aText )

        {

            bool ret = aText.StartsWith( SymbolConstants.KPrefixReadonly );

            return ret;

        }

        public static bool IsSubObject( string aText )

        {

            bool ret = aText.EndsWith( SymbolConstants.KPrefixSubObject );

            return ret;

        }

        public void PrintStats()

        {

#if TRACK_INTERNING_STATISTICS

#endif

        }

        #endregion

        #region Internal methods

#if TRACK_INTERNING_STATISTICS

        private void UpdateStatistics()

        {

            UpdateStatistics( iNamePart1 );

            UpdateStatistics( iNamePart2 );

        }

        private void UpdateStatistics( string aText )

        {

            if ( string.IsInterned( aText ) != null )

            {

                InternStats[ 0 ].Update( aText ); 

            }

            else

            {

                InternStats[ 1 ].Update( aText );

            }

        }

#endif

        #endregion

        #region From System.Object

        public override string ToString()

        {

            return iNamePart1 + iNamePart2;

        }

        #endregion

        #region Internal classes

#if TRACK_INTERNING_STATISTICS

        private class InternStatistics

        {

            public void Update( string aText )

            {

                ++iCount;

                iSize += (uint) ( aText.Length * 2 );

            }

            //

            private uint iCount = 0;

            private ulong iSize = 0;

        }

#endif

        #endregion

        #region Data members

        private readonly string iNamePart1;

        private readonly string iNamePart2;

#if TRACK_INTERNING_STATISTICS

        private static readonly InternStatistics[] InternStats = new InternStatistics[] { new InternStatistics(), new InternStatistics() };

#endif

       #endregion

    }

}