--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crashanalysercmd/PerfToolsSharedLibraries/Engine/SymbianUtils/TextUtilities/Readers/Types/Text/AsyncTextReaderBase.cs	Thu Feb 11 15:50:58 2010 +0200
@@ -0,0 +1,152 @@
+/*
+* 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.Text;
+using System.Threading;
+using System.Collections;
+using SymbianUtils.Tracer;
+
+namespace SymbianUtils
+{
+	public abstract class AsyncTextReaderBase : AsyncReaderBase
+	{
+		#region Constructors
+		protected AsyncTextReaderBase()
+            : this( null )
+		{
+		}
+        
+        protected AsyncTextReaderBase( ITracer aTracer )
+            : base( aTracer )
+        {
+        }
+        #endregion
+
+        #region Properties
+        protected bool TrimLine
+        {
+            get { return iTrimLine; }
+            set { iTrimLine = value; }
+        }
+        #endregion
+
+        #region Read handlers
+        protected virtual bool ContinueProcessing()
+		{
+			return false;
+		}
+
+		protected virtual bool ImmediateAbort()
+		{
+			return false;
+		}
+
+		protected virtual void HandleReadLine( string aLine )
+		{
+		}
+		#endregion
+
+		#region Framework API
+		protected abstract string ProvideReadLine();
+
+        protected virtual void OnProgressChanged( int aProgress )
+        {
+            NotifyEvent( TEvent.EReadingProgress );
+        }
+		#endregion
+
+        #region Internal constants
+        private const int KProgressCheckGranularity = 500;
+        #endregion
+
+        #region Internal methods
+        protected override void PerformOperation()
+		{
+			bool forcedContinue = false;
+			bool immediateAbort = false;
+			string line;
+			//
+			lock( this )
+			{
+				line = ProvideReadLine();
+				forcedContinue = ContinueProcessing();
+				immediateAbort = ImmediateAbort();
+			}
+
+            System.DateTime tenPercentTime = DateTime.Now;
+
+            int newProgress = 0;
+            int oldProgress = 0;
+            int progressTracker = 0;
+
+			while ( ( line != null || forcedContinue ) && !immediateAbort )
+			{
+                if ( line != null && TrimLine )
+				{
+					line = line.Trim();
+				}
+				//
+				lock( this )
+				{
+					HandleReadLine( line );
+				}
+				//
+				lock( this )
+				{
+                    if ( progressTracker == KProgressCheckGranularity )
+                    {
+                        newProgress = Progress;
+                        progressTracker = 0;
+                    }
+
+                    ++progressTracker;
+				}
+                if ( newProgress != oldProgress )
+                {
+#if DEBUG
+                    if ( newProgress > 0 && ( newProgress % 10 ) == 0 )
+                    {
+                        System.DateTime now = DateTime.Now;
+                        long intermediateTickDuration = ( ( now.Ticks - tenPercentTime.Ticks ) / 100 );
+                        System.Diagnostics.Debug.WriteLine( newProgress.ToString( "d2" ) + " % COMPLETE - " + intermediateTickDuration.ToString( "d12" ) );
+                        tenPercentTime = now;
+                    }
+#endif
+                    OnProgressChanged( newProgress );
+                    oldProgress = newProgress;
+                }
+                //
+				lock( this )
+				{
+					line = ProvideReadLine();
+                    forcedContinue = ContinueProcessing();
+                    immediateAbort = ImmediateAbort();
+                }
+			}
+
+            System.DateTime endTime = DateTime.Now;
+            long tickDuration = ( ( endTime.Ticks - iOperationStartTime.Ticks ) / 100 );
+            System.Diagnostics.Debug.WriteLine( "TEXT READ COMPLETE - " + tickDuration.ToString( "d12" ) );
+        }
+		#endregion
+
+        #region Data members
+        private bool iTrimLine = true;
+        #endregion
+    }
+}