diff -r 000000000000 -r 818e61de6cd1 crashanalysercmd/PerfToolsSharedLibraries/Engine/SymBuildParsingLib/Utils/SymFileSystemUtils.cs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crashanalysercmd/PerfToolsSharedLibraries/Engine/SymBuildParsingLib/Utils/SymFileSystemUtils.cs	Thu Feb 11 15:50:58 2010 +0200
@@ -0,0 +1,236 @@
+/*
+* 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.IO;
+
+namespace SymBuildParsingLib.Utils
+{
+	public class SymFileSystemUtils
+	{
+		public static bool FileExists( string aFileName )
+		{
+			FileInfo info = new FileInfo( aFileName );
+			return info.Exists;
+		}
+
+		public static bool IsDriveValid( string aDrive )
+		{
+			bool valid = false;
+			//
+			if	( aDrive.Length > 0 )
+			{
+				valid = IsDriveValid( aDrive[ 0 ] );
+			}
+			//
+			return valid;
+		}
+
+		public static bool IsDriveValid( char aDrive )
+		{
+			string driveAsLowerCaseString = new string( aDrive, 1 ).ToLower();
+			int drive = (int) driveAsLowerCaseString[ 0 ];
+			//
+			int firstDrive = (int) 'a';
+			int lastDrive = (int) 'z';
+			//
+			bool valid = ( drive >= firstDrive && drive <= lastDrive );
+			return valid;
+		}
+
+		public static string AddPathSeparator( string aDir )
+		{
+			string ret = aDir.Trim();
+			//
+			int length = ret.Length;
+			if	( length > 0 )
+			{
+				if	( ret[ length - 1 ] != Path.DirectorySeparatorChar )
+				{
+					ret += Path.DirectorySeparatorChar;
+				}
+			}
+			//
+			return ret;
+		}
+
+		public static string DirectoryFromPath( string aName )
+		{
+			// C:\system\data\wibble.txt
+			// Returns C:\System\Data\
+			string ret = Path.GetDirectoryName( aName ) + Path.DirectorySeparatorChar;
+			return ret;
+		}
+
+		public static string DriveFromPath( string aName )
+		{
+			// C:\\system\\data\\wibble.txt => C:
+			string drive = "C:";
+			//
+			if	( Path.IsPathRooted( aName ) == true )
+			{
+				drive = Path.GetPathRoot( aName );
+				
+				// Check its got a drive
+				if	( drive.Length < 2 || drive[ 1 ] != ':' )
+				{
+					throw new ArgumentException( "Path \'" + aName + "\' does not have a drive as its root" );
+				}
+
+				drive = drive.Substring( 0, 2 );
+			}
+			else
+			{
+				throw new ArgumentException( "Path \'" + aName + "\' does not contain a root" );
+			}
+			//
+			return drive;
+		}
+
+		public static string PopDir( string aDir )
+		{
+			string ret = DirectoryFromPath( aDir );
+			ret = AddPathSeparator( ret );
+
+			DirectoryInfo info = new DirectoryInfo( ret );
+			ret = info.Parent.FullName;
+			ret = AddPathSeparator( ret );
+
+			return ret;
+		}
+
+		public static string MergePaths( string aBasePath, string aOtherPath )
+		{
+			#region Examples
+			// "X:\Wibble\"                 +   "+Build\Generated"      => "X:\<epocroot>\EPOC32\Build\Generated";
+			// "X:\Wibble\"                 +   "..\something\"         => "X:\something\"
+			// "X:\Wibble\"                 +   "..something\"          => "X:\Wibble\something"
+			// "X:\Wibble\"                 +   "\something\"           => "X:\something\"
+			// "X:\Wibble\"                 +   ".\something\"          => "X:\wibble\something\"
+			// "X:\Wibble\"                 +   "something\"            => "X:\wibble\something\"
+			// "X:\Wibble\"                 +   "."                     => "X:\Wibble\"
+			// "X:\Wibble\"                 +   "\"                     => "X:\Wibble\"
+			// "X:\Wibble\"                 +   "a"                     => "X:\Wibble\a"
+			// "X:\Wibble\Whatsit.txt"      +   "X:\Wibble\"            => "X:\Wibble\"
+			// "X:\Wibble\Whatsit.txt"      +   "NextWibble.txt"        => "X:\Wibble\NextWibble.txt"
+			#endregion
+			string otherPath = aOtherPath;
+			//
+			string ret = aBasePath.Trim();
+			ret = DirectoryFromPath(ret);
+			ret = AddPathSeparator(ret);
+			//
+			int length = otherPath.Length;
+			if	(length >= 1)
+			{
+				char firstChar = otherPath[0];
+				if  ( firstChar == '.' )
+				{
+					bool needToPushRemainder = false;
+					bool finishedCheckingForDirPops = false;
+					//
+					while( finishedCheckingForDirPops == false )
+					{
+						// Assume we only go around once
+						finishedCheckingForDirPops = true;
+						firstChar = otherPath[0];
+						length = otherPath.Length;
+						//
+						if	( firstChar == '.' )
+						{
+							if	( length >= 2 )
+							{
+								char secondChar = otherPath[1];
+								if	( secondChar == '.' )
+								{
+									// Keep popping directories from the base path (now stored in 'ret')
+									// while there are "..\" sub-strings remaining at the start of the 
+									// "other path"
+									ret = PopDir(ret);
+
+									// Tidy up the "otherPath" to remove the two dots which we just parsed
+									int subStringPos = 2;
+									if	(length >= 3 && otherPath[2] == '\\')
+									{
+										subStringPos = 3;
+									}
+									//
+									needToPushRemainder = true;
+									otherPath = otherPath.Substring( subStringPos );
+									finishedCheckingForDirPops = false;
+								}
+							}
+						}
+					}
+
+					if  ( needToPushRemainder )
+					{
+						ret += otherPath;
+					}
+				}
+				else if ( firstChar == '\\' )
+				{
+					if	(length > 1)
+					{
+						// Root path
+						ret = DriveFromPath( ret );
+						ret += otherPath;
+					}
+				}
+				else if ( firstChar == '+' && otherPath.Length > 0 )
+				{
+					// Need to add epoc root and then EPOC32, then the path without the +
+					string actualPathPart = otherPath.Substring(1);
+					if	( actualPathPart.Length > 0 && actualPathPart[0] == '\\' )
+					{
+						actualPathPart = actualPathPart.Substring(1);
+					}
+
+					string epocRootValue = SymEnvironment.EpocRoot;
+					ret = DriveFromPath(ret);
+					ret += AddPathSeparator( epocRootValue );
+					ret += AddPathSeparator( SymEnvironment.Epoc32Path );
+					ret += AddPathSeparator( actualPathPart );
+				}
+				else
+				{
+					if  ( otherPath[ length-1 ] == '\\' )
+					{
+						// Assume we already have a complete path
+						ret = otherPath;
+					}
+					else
+					{
+						ret += otherPath;
+					}
+				}
+			}
+
+			/*
+			const string nameAndExt = FileNameAndExtension(ret);
+			const bool containsDot = (nameAndExt.find_last_of('.') != string::npos);
+			if  (!FileExists(ret) && ret.length() && ret[ret.length()-1] != '\\' && containsDot)
+				{
+				cout << "WARNING - possible file merge error:" << endl;
+				cout << "\tMerging: " << aBasePath << " with: " << aOtherPath << endl;
+				cout << "\t\t -> " << ret << endl << endl;
+				}
+			*/
+			return ret;
+		}
+	}
+}