--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crashanalysercmd/PerfToolsSharedLibraries/Engine/SymBuildParsingLib/Parser/PreProcessor/Parser/SymParserPreProcessor.cs	Thu Feb 11 15:50:58 2010 +0200
@@ -0,0 +1,135 @@
+/*
+* Copyright (c) 2004-2008 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 SymbianTree;
+using SymBuildParsingLib.Tree;
+using SymBuildParsingLib.Common.Objects;
+using SymBuildParsingLib.Parser.PreProcessor.Workers;
+using SymBuildParsingLib.Parser.PreProcessor.Document;
+using SymBuildParsingLib.Parser.Framework.Nodes;
+using SymBuildParsingLib.Parser.Framework.Document;
+using SymBuildParsingLib.Parser.Framework.Workers;
+using SymBuildParsingLib.Parser.Framework.Parser;
+
+
+namespace SymBuildParsingLib.Parser.PreProcessor.Parser
+{
+	public abstract class SymPreProcessorParser : SymParserBase
+	{
+		#region Constructors & destructor
+		public SymPreProcessorParser( SymParserDocument aDocument )
+			: base( aDocument )
+		{
+		}
+		#endregion
+
+		#region Properties
+		public SymPreProcessorWorker MainWorker
+		{
+			get { return iMainWorker; }
+		}
+		#endregion
+
+		#region From SymParserBase
+		protected override string ParserName
+		{
+			get { return this.ToString(); }
+		}
+
+		protected override void PrepareInitialWorkers()
+		{
+			SymParserWorkerContext context = new SymParserWorkerContext( Document.Context );
+			iMainWorker = new SymPreProcessorWorker( context );
+			//
+			QueueWorker( iMainWorker );
+
+			// Make a base call
+			base.PrepareInitialWorkers();
+		}
+		#endregion
+
+		#region Conditional expression related
+		public bool ConditionalExpressionValue
+		{
+			get
+			{
+				bool ret = true;
+				//
+				SymNodeConditionalExpression top = ConditionalExpressionPeek();
+				if	( top != null && top.HasCondition )
+				{
+					// Use the current inherited value as the first filter.
+					// This means that nested #ifs are handled correctly, (e.g.
+					// an outer #if that evaluates to false will prevent an inner
+					// #if that evalutes to true from being emitted).
+					ret = top.InheritedValue;
+
+					if	( ret )
+					{
+						SymNodeCondition condition = top.CurrentCondition;
+						ret = condition.EvaluationResult;
+					}
+				}
+				//
+				return ret;
+			}
+		}
+
+		public void ConditionalExpressionPush( SymNodeConditionalExpression aConditionalExpression )
+		{
+			bool inheritedValue = true;
+			//
+			SymNodeConditionalExpression top = ConditionalExpressionPeek();
+			if	( top != null )
+			{
+				inheritedValue = top.InheritedValue;
+			}
+			//
+			aConditionalExpression.InheritedValue = inheritedValue;
+			iCondExpResultStack.Push( aConditionalExpression );
+		}
+
+		public SymNodeConditionalExpression ConditionalExpressionPop()
+		{
+			System.Diagnostics.Debug.Assert( iCondExpResultStack.Count > 0 );
+			//
+			SymNodeConditionalExpression top = ConditionalExpressionPeek();
+			iCondExpResultStack.Pop();
+			return top;
+		}
+
+		public SymNodeConditionalExpression ConditionalExpressionPeek()
+		{
+			SymNodeConditionalExpression top = null;
+			//
+			if	( iCondExpResultStack.Count > 0 )
+			{
+				top = (SymNodeConditionalExpression) iCondExpResultStack.Peek();
+			}
+			//
+			return top;
+		}
+		#endregion
+
+		#region Data members
+		private SymPreProcessorWorker iMainWorker;
+		private Stack iCondExpResultStack = new Stack();
+		#endregion
+	}
+}