/*

* 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.IO;

using System.Collections.Generic;

namespace SymbolLib.Generics

{

	internal class GenericSymbolComparer : IComparer<GenericSymbol>

	{

        #region IComparer<GenericSymbol> Members

        int IComparer<GenericSymbol>.Compare( GenericSymbol aLeft, GenericSymbol aRight )

        {

            int ret = -1;

            //

            if ( aLeft == null || aRight == null )

            {

                if ( aRight == null )

                {

                    ret = 1;

                }

            }

            else

            {

                int ret2 = aLeft.AddressRange.CompareTo( aRight.AddressRange );

                GenericSymbol left = aLeft;

                System.Diagnostics.Debug.Assert( left.EndAddress >= left.Address );

                GenericSymbol right = aRight;

                System.Diagnostics.Debug.Assert( right.EndAddress >= right.Address );

                //

                if ( left.Address == right.Address && left.EndAddress == right.EndAddress )

                {

                    ret = 0;

                }

                else if ( left.EndAddress == right.Address )

                {

                    System.Diagnostics.Debug.Assert( left.Address < right.Address );

                    System.Diagnostics.Debug.Assert( right.EndAddress >= left.EndAddress );

                    //

                    ret = -1;

                }

                else if ( left.Address == right.EndAddress )

                {

                    System.Diagnostics.Debug.Assert( right.Address < left.Address );

                    System.Diagnostics.Debug.Assert( left.EndAddress >= right.EndAddress );

                    //

                    ret = 1;

                }

                else if ( left.Address > right.EndAddress )

                {

                    System.Diagnostics.Debug.Assert( left.EndAddress > right.EndAddress );

                    System.Diagnostics.Debug.Assert( left.EndAddress > right.Address );

                    ret = 1;

                }

                else if ( left.EndAddress < right.Address )

                {

                    System.Diagnostics.Debug.Assert( left.Address < right.EndAddress );

                    System.Diagnostics.Debug.Assert( right.EndAddress > left.EndAddress );

                    ret = -1;

                }

                System.Diagnostics.Debug.Assert( ret2 == ret );

            }

            //

            return ret;

          }

        #endregion

    }

}