--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crashanalysercmd/PerfToolsSharedLibraries/Engine/SymbianUtils/TextUtilities/Readers/Types/Text/AsyncTextFileReader.cs	Thu Feb 11 15:50:58 2010 +0200
@@ -0,0 +1,202 @@
+/*
+* 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 AsyncTextFileReader : AsyncTextReader
+	{
+		#region Constructors
+		protected AsyncTextFileReader( string aFileName )
+			: this( aFileName, new AsyncTextReaderPrefix(), null )
+		{
+		}
+
+        protected AsyncTextFileReader( string aFileName, ITracer aTracer )
+            : this( aFileName, new AsyncTextReaderPrefix(), false, aTracer )
+        {
+        }
+
+        protected AsyncTextFileReader( string aFileName, bool aRouteBlankLines, ITracer aTracer )
+            : this( aFileName, new AsyncTextReaderPrefix(), aRouteBlankLines, aTracer )
+		{
+		}
+
+        protected AsyncTextFileReader( string aFileName, AsyncTextReaderPrefix aPrefixes )
+            : this( aFileName, aPrefixes, false, null )
+		{
+		}
+
+        protected AsyncTextFileReader( string aFileName, AsyncTextReaderPrefix aPrefixes, ITracer aTracer )
+			: this( aFileName, aPrefixes, false, aTracer )
+		{
+		}
+
+        protected AsyncTextFileReader( string aFileName, AsyncTextReaderPrefix aPrefixes, bool aRouteBlankLines )
+            : this( aFileName, aPrefixes, aRouteBlankLines, null )
+        {
+		}
+
+        protected AsyncTextFileReader( string aFileName, AsyncTextReaderPrefix aPrefixes, bool aRouteBlankLines, ITracer aTracer )
+			: base( aPrefixes, aRouteBlankLines, aTracer )
+		{
+			iSourceFileName = aFileName;
+		}
+		#endregion
+
+		#region From DisposableObject - Cleanup Framework
+		protected override void CleanupManagedResources()
+		{
+			try
+			{
+				Cleanup();
+			}
+			finally
+			{
+				base.CleanupManagedResources();
+			}
+		}
+		#endregion
+
+		#region Properties
+		public string FileName
+		{
+			get
+			{
+				string fileName = string.Empty;
+				//
+				lock( this )
+				{
+					fileName = iSourceFileName;
+				}
+				//
+				return fileName; 
+			}
+		}
+
+		public long LineNumber
+		{
+			get
+			{
+				long lineNumber = 0;
+				//
+				lock( this )
+				{
+					lineNumber = iLineNumber;
+				}
+				//
+				return lineNumber; 
+			}
+		}
+		#endregion
+
+		#region From AsyncReaderBase
+		protected override void HandleReadStarted()
+		{
+            FileStream stream = new FileStream( FileName, FileMode.Open, FileAccess.Read, FileShare.Read );
+            iReader = new StreamReader( stream, Encoding.UTF8, false, 1024 );
+
+            // Cache length because this property is VERY expensive to call.
+            if ( iReader.BaseStream != null )
+            {
+                iSize = iReader.BaseStream.Length;
+            }
+            //
+			base.HandleReadStarted();
+		}
+
+		protected override void HandleReadCompleted()
+		{
+			try
+			{
+				Cleanup();
+			}
+			finally
+			{
+				base.HandleReadCompleted();
+			}
+		}
+		#endregion
+
+		#region Abstract reading framework
+		protected override string ProvideReadLine()
+		{
+			++iLineNumber;
+			return iReader.ReadLine();
+		}
+
+		protected override long Size
+		{
+			get
+			{
+				long size = 0;
+				//
+				lock( this )
+				{
+                    size = iSize;
+				}
+				//
+				return size;
+			}
+		}
+
+		protected override long Position
+		{
+			get
+			{
+				long position = 0;
+				//
+				lock( this )
+				{
+					if (iReader != null && iReader.BaseStream != null)
+					{
+						position = iReader.BaseStream.Position;
+					}
+				}
+				//
+				return position;
+			}
+		}
+		#endregion
+
+		#region Internal methods
+		private void Cleanup()
+		{
+			lock( this )
+			{
+				if	( iReader != null )
+				{
+					iReader.Close();
+					iReader = null;
+				}
+			}
+		}
+		#endregion
+
+		#region Data members
+		private readonly string iSourceFileName;
+		private StreamReader iReader;
+		private long iLineNumber;
+        private long iSize;
+		#endregion
+	}
+}