P4Server.cs #1

/*******************************************************************************

Copyright (c) 2010, Perforce Software, Inc.  All rights reserved.

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	notice, this list of conditions and the following disclaimer in the
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/*******************************************************************************
 * Name		: P4Server.cs
 *
 * Author	: dbb
 *
 * Description	: Classes used to wrap calls in the P4Bridge DLL in C#.
 *
 ******************************************************************************/
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;
using System.Text;
using System.IO;
using System.Timers;
using System.Threading;
using System.Diagnostics;

namespace Perforce.P4
{
	/// <summary>
	/// Allows a client to monitor the execution of a command. It allow the client to 
	/// cancel the command if it takes to long to complete or display a UI to allow the 
	/// user to cancel the command.
	/// </summary>
	public interface IKeepAlive
	{
		/// <summary>
		/// A command is starting
		/// </summary>
		/// <param name="server">Server running the command</param>
		/// <param name="cmdId">CmdId of the command</param>
		/// <param name="cmdLine">Command Line for the command for display purposes</param>
		/// <returns></returns>
		bool StartQueryCancel(P4Server server, uint cmdId, Thread cmdRunThread,string cmdLine);
		// Note, it is OK for the API might send this multiple times with the,
		// same cmdId to ensure that any UI displayed by the client is dismissed.
		/// <summary>
		/// The command has completed dismiss any UI or timeouts
		/// </summary>
		/// <param name="cmdId">CmdId of the command that completed</param>
		/// <remarks>
		/// Note, it is OK for the API might send this multiple times with the,
		/// same cmdId to ensure that any UI displayed by the client iss dismissed.
		/// </remarks>
		void CommandCompleted(uint cmdId);
	}

	/// <summary>
	/// P4Server
	/// 
	/// Represents the connection to a Perforce Server using the the P4 Bridge 
	/// DLL. It wraps the calls exported by the DLL and transforms the data
	/// types exported by the DLL as native C#.NET data types.
	/// </summary>
	public partial class P4Server : IDisposable
	{
		public IKeepAlive KeepAlive { get; set; }

		internal object Sync = new object();

		private Dictionary<int, P4CommandResult> _lastResultsCache;
		/// <summary>
		/// The results of the last command executed on this thread
		/// </summary>
		public P4CommandResult LastResults 
		{
			get
			{
				if (_lastResultsCache.ContainsKey(System.Threading.Thread.CurrentThread.ManagedThreadId))
				{
					return _lastResultsCache[System.Threading.Thread.CurrentThread.ManagedThreadId];
				}
				return null;
			}
			internal set
			{
				if (_lastResultsCache == null)
				{
					_lastResultsCache = new Dictionary<int, P4CommandResult>();
				}
				if (_lastResultsCache.Count > 32)
				{
					// if the results cach is getting large, throw awy anything older than 10 seconds
                    int[] keys = new int[_lastResultsCache.Keys.Count];
                    _lastResultsCache.Keys.CopyTo(keys, 0);
					DateTime old = DateTime.Now-TimeSpan.FromSeconds(10);
					foreach (int key in keys)
					{
						if (_lastResultsCache[key].TimeStamp < old)
						{
							Debug.Trace(string.Format("Throwing away results for thread, {0}", key));

							_lastResultsCache.Remove(key);
						}
					}
				}
				_lastResultsCache[System.Threading.Thread.CurrentThread.ManagedThreadId] = value;
			}
		}

		/// <summary>
		/// Get the version of the p4.net assembly
		/// </summary>
		public static System.Version Version
		{
			get
			{
				return System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;
			}
		}

		/// <summary>
		/// Get the error message generated by the previous connection (if any)
		/// </summary>
		public static P4ClientError ConnectionErrorInt
		{
			get
			{
				IntPtr pErr = P4Bridge.GetConnectionError();
				if (pErr != null)
					return new P4ClientError( null, pErr );
				return null;
			}
		}

		/// <summary>
		/// Get the error message generated by the previous connection (if any)
		/// from the bridge dll.
		/// </summary>
		public P4ClientError ConnectionError { get; private set; }


		private void LogBridgeMessage(  int log_level,
										String file,
										int line,
										String message )
		{
			Debug.Trace(String.Format("[{2}]P4Bridge({0}:{1}) {3}", file, line, log_level, message));
			
			// remove the full path to the source, keep just the file name
			String fileName = Path.GetFileName( file );

			string category = String.Format("P4Bridge({0}:{1})", fileName, line);

			LogFile.LogMessage( log_level, category, message );
		}

		private string _server;
		private string _user;
		private string _pass;
		private string _ws_client;
		private string _prog_name;
		private string _prog_ver;
		private string _cwd;

		private P4CallBacks.LogMessageDelegate logfn = null;

		/// <summary>
		/// Create a P4BridgeServer used to connect to the specified P4Server
		/// </summary>
		/// <param name="server">Host:port for the P4 server.</param>
		/// <param name="user">User name for the login. 
		///     Can be null/blank if only running commands that do not require 
		///     a login.</param>
		/// <param name="pass">Password for  the login. Can be null/blank if 
		///     only running commands that do not require a login.</param>
		/// <param name="ws_client">Workspace (client) to be used by the 
		///     connection. Can be null/blank if only running commands that do 
		///     not require a login.</param>
		public P4Server(String server,
						 String user,
						 String pass,
						 String ws_client)
			: this(server, user, pass, ws_client, null)
		{
		}

		/// <summary>
		/// Create a P4BridgeServer using the PUC specified by the environment
		///		or a p4config file if one exists.
		/// </summary>
		/// <param name="cwd">Current working Directory. Can be null/blank if 
		///		not connecting to the Perforce server using a P4Config file.</param>
		public P4Server(String cwd)
			: this(null,null,null,null,cwd)
		{
		}
		/// <summary>
		/// Create a P4BridgeServer used to connect to the specified P4Server
		/// </summary>
		/// <param name="server">Host:port for the P4 server.</param>
		/// <param name="user">User name for the login. 
		///     Can be null/blank if only running commands that do not require 
		///     a login.</param>
		/// <param name="pass">Password for  the login. Can be null/blank if 
		///     only running commands that do not require a login.</param>
		/// <param name="ws_client">Workspace (client) to be used by the 
		///     connection. Can be null/blank if only running commands that do 
		///     not require a login.</param>
		/// <param name="cwd">Current working Directory. Can be null/blank if 
		///		not connecting to the Perforce server using a P4Config file.</param>
		internal P4Server(String server,
						 String user,
						 String pass,
						 String ws_client,
						 String cwd)
		{
			RunCmdLastContactMap = new Dictionary<uint, CmdContactTimer>();

            //LogFile.LogMessage(3, "P4Server", "server: " + server);
            //LogFile.LogMessage(3, "P4Server", "user: " + user);
            //LogFile.LogMessage(3, "P4Server", "pass: " + pass);
            //LogFile.LogMessage(3, "P4Server", "client: " + (ws_client != null ? ws_client : "null"));
            //LogFile.LogMessage(3, "P4Server", "cwd: " + (cwd != null ? cwd : "null"));

			if (string.IsNullOrEmpty(cwd) == false)
			{
				string configPath = P4Server.GetConfig(cwd);
				if ((string.IsNullOrEmpty(configPath)== false) && (configPath != "noconfig") && 
					(System.IO.File.Exists(configPath)))
				{
					using (StreamReader sr = new StreamReader(configPath))
					{ 
						string line = sr.ReadLine();
						while (line != null)
						{
							line = line.Trim();
							if (line.ToUpper().StartsWith("P4PORT="))
							{
								string[] parts = line.Split('=');
								if (parts.Length >= 2)
								{
									server = parts[1];
								}
							}
							else if (line.ToUpper().StartsWith("P4USER="))
							{
								string[] parts = line.Split('=');
								if (parts.Length >= 2)
								{
									user = parts[1];
								}
							}
							else if (line.ToUpper().StartsWith("P4CLIENT="))
							{
								string[] parts = line.Split('=');
								if (parts.Length >= 2)
								{
									ws_client = parts[1];
								}
							}
							line = sr.ReadLine();
						}
					}
				}
			}
			_server = server;
			_user = user;
			_pass = pass;
			_ws_client = ws_client;
			_cwd = cwd;
			isUnicode = false;

            // Translate nulls to empty strings
            if (_ws_client == null) _ws_client = "";

         //   if (string.IsNullOrEmpty(_ws_client))
         //       LogFile.LogMessage(3, "p4Server", "client is null or empty");
         //   else
         //       LogFile.LogMessage(3, "p4Server", "client is: " + _ws_client);

            CurrentEncodeing = P4Encoding.ASCII;

			// connect to the server without passing user/client/password, that way 
			// we can determine if the target server is Unicode enabled or not, so we
			// can use the correct encoding for those parameters
            //LogFile.LogMessage(1,"P4Server1", "before ConnectA");
			if (logfn == null)
			{
				logfn = new P4CallBacks.LogMessageDelegate(LogBridgeMessage);
			}
			pServer = P4Bridge.ConnectA(server, null, null, null, logfn);
            
            if (pServer != IntPtr.Zero)
			{
				if (isUnicode = P4Bridge.IsUnicode(pServer))
				{
                    // LogFile.LogMessage(3, "P4Server1", "pServer IsUnicode");
					// if the server supports Unicode, encode the username, password, and workspace 
					// name in UTF-8
					using (PinnedByteArray pCwd = MarshalStringToIntPtr(_cwd),
										   pUser = MarshalStringToIntPtr(_user),
										   pClient = MarshalStringToIntPtr(_ws_client))
					{
						P4Bridge.set_cwdW(pServer, pCwd);
						P4Bridge.set_userW(pServer, pUser);
						P4Bridge.set_clientW(pServer, pClient);
					}
				}
				else
				{
                   // LogFile.LogMessage(3, "P4Server1", "pServer ASCII");
					// if the server does not support Unicode, pass the username, password, and 
					// workspace name in ASCII
					P4Bridge.set_cwdA(pServer, _cwd);
					P4Bridge.set_userA(pServer, _user);
					P4Bridge.set_clientA(pServer, _ws_client);
				}
			}
            
            if (pServer == IntPtr.Zero)
			{

				ConnectionError = ConnectionErrorInt;
				if (ConnectionError == null)
				{
					IntPtr pObj = P4Bridge.GetErrorResults(pServer, 0);
					P4ClientErrorList _errorList = new P4ClientErrorList(this, pObj);

					if (_errorList.Count > 0)
					{
						P4Exception.Throw(_errorList, GetInfoResults(0));
					}
					ConnectionError = new P4ClientError(ErrorSeverity.E_FATAL, string.Format("Unknown error connecting to server, {0}", _server));
				}
				P4Exception.Throw(ConnectionError);
				return;
				//throw new ApplicationException(connectionError);
			}
			else
			{
				ConnectionError = null;
			}

            if (isUnicode)
			{
                //LogFile.LogMessage(3, "P4Server1", "IsUnicode Block");
                 string charset = null;
			     CurrentEncodeing = P4Encoding.utf8;
                 string myos = Environment.OSVersion.ToString();

                 //System.Console.WriteLine("my os: " + myos);

                if (myos.Contains("Windows"))
                {
                    // Windows
                    string gotCharset = P4Server.Get("P4CHARSET");
                    if (gotCharset != null)
                    {
                        charset = gotCharset;
                    }
                    else
                    {
                       Process proc = new Process();
                       proc.StartInfo = new ProcessStartInfo();

                       proc.StartInfo.UseShellExecute = false;
                       proc.StartInfo.FileName = "p4";
                       proc.StartInfo.Arguments = "set P4CHARSET";
                       proc.StartInfo.RedirectStandardOutput = true; ;
                       proc.StartInfo.CreateNoWindow = true;

                       proc.Start();
                       string output = proc.StandardOutput.ReadToEnd();
                       proc.WaitForExit();

                       string[] parts = output.Split(new char[] { '=', ' ' }, 3);
                       if ((parts != null) && (parts.Length >= 2) && (parts[1].Trim() != "none"))
                       { 
                          charset = parts[1].Trim();
                       }
                    }
                    
                }
                else 
                {
                    // OSX and Linux code block
                    // P4HOST and P4CHARSET environment variables get passed into Bridge where they can get picked up
                    // P4Server.Get() does not seem to work on OSX

                    charset = Environment.GetEnvironmentVariable("P4CHARSET");
                    if (charset == null)
                        charset = "utf8";
                }
                SetCharacterSet(Charset[(int)CurrentEncodeing], charset);
			}
			apiLevel = P4Bridge.APILevel(pServer);
			requiresLogin = P4Bridge.UseLogin(pServer);

			if ((!requiresLogin) && (!string.IsNullOrEmpty(_pass)))
			{
				using (PinnedByteArray pPass = MarshalStringToIntPtr(_pass))
				{
					P4Bridge.set_passwordW(pServer, pPass);
				}
			}
			// Link the callbacks from the bridge dll to their corresponding events
			SetInfoResultsCallback();
			SetTaggedOutputCallback();
			SetErrorCallback();
			SetTextResultsCallback();
			SetBinaryResultsCallback();
			SetPromptCallback();
			SetResolveCallback();
			SetResolveACallback();

			// If we were supplied a password, login into the server. If the 
			// server requires a login (security level >= 3), this will prompt
			// for the password. If login is not required, the command will just
			// return with a result saying that login is not required.
			//Login(pass, null);
		}

		/// <summary>
		/// Create a P4BridgeServer used to connect to the specified P4Server
		/// </summary>
		/// <param name="server">Host:port for the P4 server.</param>
		/// <param name="user">User name for the login. 
		///     Can be null/blank if only running commands that do not require 
		///     a login.</param>
		/// <param name="pass">Password for  the login. Can be null/blank if 
		///     only running commands that do not require a login.</param>
		/// <param name="ws_client">Workspace (client) to be used by the 
		///     connection. Can be null/blank if only running commands that do 
		///     not require a login.</param>
		public P4Server(String server,
						 String user,
						 String pass,
						 String ws_client,
						 String cwd,
						 String trust_flag,
						 String fingerprint)
		{
			RunCmdLastContactMap = new Dictionary<uint, CmdContactTimer>();

			_server = server;
			_user = user;
			_pass = pass;
			_ws_client = ws_client;
			_cwd = cwd;

			CurrentEncodeing = P4Encoding.ASCII;

			P4CallBacks.LogMessageDelegate logfn =
				new P4CallBacks.LogMessageDelegate(LogBridgeMessage);

            //if (string.IsNullOrEmpty(_ws_client))
            //    LogFile.LogMessage(3, "p4ServerT", "client is null or empty");
            //else
            //    LogFile.LogMessage(3, "p4ServerT", "client is: " + _ws_client);

            // encode the username, password, and workspace name in UTF-8, we
            // won't know if the client supports Unicode until after connect 
            // returns
            using (PinnedByteArray pUser = MarshalStringToIntPtr(_user),
								   pClient = MarshalStringToIntPtr(_ws_client))
			{
				IntPtr pLogFn = IntPtr.Zero;
				if (logfn != null)
					pLogFn = Marshal.GetFunctionPointerForDelegate(logfn);

				pServer = P4Bridge.TrustedConnectW(_server, pUser, IntPtr.Zero, pClient, trust_flag, fingerprint, pLogFn);

			}

			if (pServer == IntPtr.Zero)
			{
				ConnectionError = ConnectionErrorInt;
				if (ConnectionError == null)
				{
					IntPtr pObj = P4Bridge.GetErrorResults(pServer, 0);
					P4ClientErrorList _errorList = new P4ClientErrorList(this, pObj);

					if ((_errorList != null) && (_errorList.Count > 0))
					{
						P4Exception.Throw(_errorList, GetInfoResults(0));
					}
					ConnectionError = new P4ClientError(ErrorSeverity.E_FAILED, 
						string.Format("Unknown error connecting to server, {0}", _server));
				}
				P4Exception.Throw(ConnectionError);
				return;
			}
			else
			{
				ConnectionError = null;
			}


			if (isUnicode = P4Bridge.IsUnicode(pServer))
			{
				CurrentEncodeing = P4Encoding.utf8;

				SetCharacterSet(Charset[(int)CurrentEncodeing],
					Charset[(int)P4Encoding.utf16bom]);
			}
			apiLevel = P4Bridge.APILevel(pServer);
			requiresLogin = P4Bridge.UseLogin(pServer);

			if ((!requiresLogin) && (!string.IsNullOrEmpty(_pass)))
			{
				using (PinnedByteArray pPass = MarshalStringToIntPtr(_pass))
				{
					P4Bridge.set_passwordW(pServer, pPass);
				}
			}
			// Link the callbacks from the bridge dll to their corresponding events
			SetInfoResultsCallback();
			SetTaggedOutputCallback();
			SetErrorCallback();
			SetTextResultsCallback();
			SetBinaryResultsCallback();
			SetPromptCallback();
			SetResolveCallback();
			SetResolveACallback();

            // If we were supplied a password, login into the server. If the 
            // server requires a login (security level >= 3), this will prompt
            // for the password. If login is not required, the command will just
            // return with a result saying that login is not required.
            //Login(pass, null);
        }

		/// <summary>
		/// Run a login command on the server
		/// </summary>
		/// <param name="password">User's password</param>
		/// <returns>Success/Failure</returns>
		/// <remarks>
		/// If the server requires a login (security level >= 3), this will 
		/// prompt for the password. If login is not required, the command will
		/// just return with a result saying that login is not required.
		/// </remarks>
		public bool Login(string password, StringList options)
		{
			if (!requiresLogin)
			{
				// server does not support login command
				if (!string.IsNullOrEmpty(password))
				{
					using (PinnedByteArray pPass = MarshalStringToIntPtr(password))
					{
						P4Bridge.set_passwordW(pServer, pPass);
					}
					return true;
				}
				return false;
			}
			P4Command login = new P4Command(this, "login", false);
			login.Responses = new Dictionary<string, string>();
			login.Responses["DefaultResponse"] = password;
			P4CommandResult results;
			try
			{
				results = login.Run(options);
			}
			catch
			{
				results = null;
				return false;
			}
			if (!results.Success)
			{
				ConnectionError = results.ErrorList[0];
			}
			else
			{
				ConnectionError = null;
			}
			return results.Success;
		}

		/// <summary>
		/// Run a logout command on the server
		/// </summary>
		/// <param name="options">The -a flag invalidates the ticket on the server.</param>
		/// <returns>Success/Failure</returns>
		/// <remarks>
		/// If the server requires a login (security level >= 3), this will 
		/// logout the user and remove the local ticket.
		/// </remarks>
		public bool Logout(StringList options)
		{
			P4Command logout = new P4Command(this, "logout", false);
			P4CommandResult results;
			try
			{
				results = logout.Run(options);
			}
			catch
			{
				results = null;
				return false;
			}
			if (!results.Success)
			{
				ConnectionError = results.ErrorList[0];
			}
			else
			{
				ConnectionError = null;
			}
			return results.Success;
		}

		/// <summary>
		/// Finalizer
		/// </summary>
		~P4Server() { Dispose(false); }

		bool _disposed = false;

		public void Dispose(bool disposing)
		{
			if (_disposed)
			{
				return;
			}
			if (!disposing)
			{
			}
			Close();

			TaggedOutputCallbackFn_Int = null;
			pTaggedOutputCallbackFn = IntPtr.Zero;
			P4Bridge.SetTaggedOutputCallbackFn(pServer, IntPtr.Zero);

			ErrorCallbackFn_Int = null;
			pErrorCallbackFn = IntPtr.Zero;
			P4Bridge.SetErrorCallbackFn(pServer,  IntPtr.Zero);

			InfoResultsCallbackFn_Int = null;
			pInfoResultsCallbackFn = IntPtr.Zero;
			P4Bridge.SetInfoResultsCallbackFn(pServer,  IntPtr.Zero);

			TextResultsCallbackFn_Int = null;
			pTextResultsCallbackFn = IntPtr.Zero;
			P4Bridge.SetTextResultsCallbackFn(pServer, IntPtr.Zero);

			BinaryResultsCallbackFn_Int = null;
			pBinaryResultsCallbackFn = IntPtr.Zero;
			P4Bridge.SetBinaryResultsCallbackFn(pServer,  IntPtr.Zero);

			PromptCallbackFn_Int = null;
			pPromptCallbackFn = IntPtr.Zero;
			P4Bridge.SetPromptCallbackFn(pServer,  IntPtr.Zero);

			_disposed = true;
		}
		#region IDisposable Members

		/// <summary>
		/// For IDispose
		/// </summary>
		public void Dispose()
		{
			Dispose(true);
			GC.SuppressFinalize(this);
		}
		#endregion

		/// <summary>
		/// Reconnect to the server in the event the connection is lost
		/// </summary>
		public void Reconnect()
		{
			if (pServer != IntPtr.Zero)
			{
				P4Bridge.CloseConnection(pServer);
				pServer = IntPtr.Zero;
			}
			CurrentEncodeing = P4Encoding.ASCII;

			P4CallBacks.LogMessageDelegate logfn =
				new P4CallBacks.LogMessageDelegate(LogBridgeMessage);

			// encode the username, password, and workspace name in UTF-8, we
			// won't know if the client supports Unicode until after connect 
			// returns
			using (PinnedByteArray pUser = MarshalStringToIntPtr(_user),
								   pPass = MarshalStringToIntPtr(_pass),
								   pClient = MarshalStringToIntPtr(_ws_client))
			{
				IntPtr pLogFn = IntPtr.Zero;
				if (logfn != null)
					pLogFn = Marshal.GetFunctionPointerForDelegate(logfn);

				pServer = P4Bridge.ConnectW(_server, pUser, pPass, pClient, pLogFn);

			}

			if (pServer == IntPtr.Zero)
			{

				ConnectionError = ConnectionErrorInt;
				P4Exception.Throw(ConnectionError);
				return;
			}
			else
			{
				ConnectionError = null;
			}


			if (isUnicode = P4Bridge.IsUnicode(pServer))
			{
				CurrentEncodeing = P4Encoding.utf8;

				SetCharacterSet(Charset[(int)CurrentEncodeing],
					Charset[(int)P4Encoding.utf16bom]);
			}

			requiresLogin = P4Bridge.UseLogin(pServer);

			// Link the callbacks from the bridge dll to their corresponding events
			SetInfoResultsCallback();
			SetTaggedOutputCallback();
			SetErrorCallback();
			SetTextResultsCallback();
			SetBinaryResultsCallback();
			SetPromptCallback();
			SetResolveCallback();
			SetResolveACallback();

			if (_cwd != null)
			{
				CurrentWorkingDirectory = _cwd;
			}
			ProgramName = _prog_name;
			ProgramVersion = _prog_ver;

			// *** Don't login using the login command. If we are reconnecting
			// *** after a timeout, doe not want to risk the login timing out and 
			// *** throwing us in an infinite loop
			// We've theoretically already logged in, so if using tickets, _pass
			// should hold the ticket.
			//Login(_pass, null);
		}

		/// <summary>
		/// Close the connection to a P4 Server
		/// </summary>
		/// <remarks> 
		/// Called by the Dispose() method
		/// </remarks>
		public void Close()
		{
			if (pServer != IntPtr.Zero)
			{
				try
				{
					//if ((DisconnectQueue != null) && (DisconnectQueue.Count > 0))
					//{
					//    DisconnectQueueItem it = DisconnectQueue.Dequeue();
					//    while (it != null)
					//    {
					//        P4Bridge.ReleaseConnection(pServer, it.CmdId);
					//        it = DisconnectQueue.Dequeue();
					//    }
					//}
					if (DisconnectTimer != null)
					{
						DisconnectTimer.Stop();
						DisconnectTimer.Dispose();
					}
					//if (disconnectTriggers != null)
					//{
					//    uint[] keys = new uint[disconnectTriggers.Keys.Count];
					//    disconnectTriggers.Keys.CopyTo(keys, 0);
					//    foreach (uint cmdId in keys)
					//    {
					//        System.Timers.Timer disconnectTrigger = disconnectTriggers[cmdId];
					//        disconnectTrigger.Stop();
					//        disconnectTrigger.Dispose();
					//        disconnectTriggers.Remove(cmdId);
					//    }
					//}
					lock (runningCommands)
					{
						if (runningCommands.Count > 0)
						{
							Debug.Trace(
								string.Format("In Close(), currently running {0} commands", runningCommands.Count));
							// can't canel commands from the origonal list, as that might change the contents
							// of the list and crash the enumerator
							List<RunCommandThreadParam> cancelList = new List<RunCommandThreadParam>();

							foreach (RunCommandThreadParam rc in runningCommands)
							{
								cancelList.Add(rc);
							}

							foreach (RunCommandThreadParam rc in cancelList)
							{
								P4Bridge.CancelCommand(pServer, rc.cmdId);
							}
							Thread.Sleep(TimeSpan.FromSeconds(1)); // wait for commands to exit
						}
					}
				}
				finally
				{
					if (P4Bridge.CloseConnection(pServer) == 0)
					{
						Debug.Trace("Could not close connection, commands are still running");
					}
					pServer = IntPtr.Zero;
				}
			}
		}
		/// <summary>
		/// Need to use Unicode when marshalling to/from the P4 server
		/// </summary>
		public bool UseUnicode
		{
			get
			{
				return isUnicode;
			}
		}

		/// <summary>
		/// What API level does the server support
		/// </summary>
		public int ApiLevel
		{
			get
			{
				return apiLevel;
			}
		}
		/// <summary>
		/// The server requires a client to use the login command to pass credentials.
		/// </summary>
		public bool ReqiresLogin
		{
			get
			{
				return requiresLogin;
			}
		}
		System.Timers.Timer DisconnectTimer = null;

		private void OnDisconnectTimer(object source, ElapsedEventArgs e)
		{
			if (pServer == IntPtr.Zero)
			{
				return;
			}
			int idleConnections = P4Bridge.FreeConnections(pServer, (UInt64)DateTime.Now.Ticks);

			if ((runningCommands.Count <= 0) && (idleConnections == 0))
			{
				DisconnectTimer.Stop();
			}
		}

		//private class DisconnectTrigger : System.Timers.Timer
		//{
		//    private DisconnectTrigger() { CmdId = 0; }
		//    public DisconnectTrigger(double idleDisconectTime, uint cmdId)
		//        : base (idleDisconectTime) { CmdId = cmdId; }
		//    public uint CmdId { get; private set; }
		//}
		//private Dictionary<uint, DisconnectTrigger> disconnectTriggers = null;

		//private void OnDisconnectTrigger(object source, ElapsedEventArgs e)
		//{
		//    if (pServer == IntPtr.Zero)
		//    {
		//        return;
		//    }
		//    DisconnectTrigger trigger = source as DisconnectTrigger;
		//    if (trigger != null)
		//    {
		//        FreeConnection(trigger.CmdId);
		//    }
		//    else
		//    {
		//        if (runningCommands.Count > 0)
		//        {
		//            // don't disconnect if commands are still running.
		//            return;
		//        }
		//        P4Bridge.Disconnect(pServer);
		//    }
		//}

		public void Disconnect()
		{
			if (pServer != IntPtr.Zero)
			{
				P4Bridge.Disconnect(pServer);
			}
		}

		private class RunCommandThreadParam
		{
			public string cmd;
			public bool tagged;
			public String[] args;
			public int argc;
			public bool Results;
			public uint cmdId;

			public Exception RunCmdException = null;
		}
		/// <summary>
		/// Maximum time for a command to run before timing out;
		/// </summary>
		public TimeSpan KeepAliveDelay = TimeSpan.FromSeconds(5);

		[Obsolete("Use RunCmdTimeout")]
		public TimeSpan RunCmdTimout
		{
			get { return RunCmdTimeout; }
			set { RunCmdTimeout = value; }
		}

#if DEBUG
		// long delays for debugging so it won't time out / disconnect why stepping through code

		public TimeSpan RunCmdTimeout = TimeSpan.FromSeconds(5000);

		public double IdleDisconnectWaitTime = 500; // .5 seconds in milliseconds
#else
		public TimeSpan RunCmdTimeout = TimeSpan.FromSeconds(5);

		public double IdleDisconnectWaitTime = 500; // .5 seconds in milliseconds
#endif

		private Dictionary<uint, CmdContactTimer> RunCmdLastContactMap = null;

		public bool IsCommandPaused(uint cmdId)
		{
			return RunCmdLastContactMap[cmdId].IsPaused;

		}
		public void PauseRunCmdTimer(uint cmdId)
		{
			if (RunCmdLastContactMap == null || !RunCmdLastContactMap.ContainsKey(cmdId))
			{
				return;
			}
			RunCmdLastContactMap[cmdId].Pause();
		}

		public void ContinueRunCmdTimer(uint cmdId)
		{
			if (RunCmdLastContactMap == null || !RunCmdLastContactMap.ContainsKey(cmdId))
			{
				return;
			}
			RunCmdLastContactMap[cmdId].Continue();
		}

		public class CmdContactTimer : IDisposable
		{
			private uint cmdId = 0;
			private int CallbackCnt = 0;
			private Dictionary<uint, CmdContactTimer> RunCmdLastContactMap = null;
				DateTime LastContact = DateTime.MaxValue;

			private CmdContactTimer() { }
			public CmdContactTimer(Dictionary<uint, CmdContactTimer> runCmdLastContactMap, uint _cmdId)
			{
				if (runCmdLastContactMap == null)
				{
					throw new ArgumentNullException("runCmdLastContactMap");
				}

				lock (runCmdLastContactMap)
				{
					cmdId = _cmdId;
					CallbackCnt = 0;
					LastContact = DateTime.Now;

					RunCmdLastContactMap = runCmdLastContactMap;

					RunCmdLastContactMap[cmdId] = this;
				}
			}

			public void Pause()
			{
				lock (RunCmdLastContactMap)
				{
					if (RunCmdLastContactMap == null || !RunCmdLastContactMap.ContainsKey(cmdId))
					{
						return;
					}
					LastContact = DateTime.MaxValue;
					CallbackCnt++;
				}
			}

			public void Continue()
			{
				lock (RunCmdLastContactMap)
				{
					if (RunCmdLastContactMap == null || !RunCmdLastContactMap.ContainsKey(cmdId))
					{
						return;
					}
					CallbackCnt--;

					if (CallbackCnt == 0)
					{
						LastContact = DateTime.Now;
					}
				}
			}

			#region IDisposable Members

			public void Dispose()
			{
				lock (RunCmdLastContactMap)
				{
					if (RunCmdLastContactMap != null || RunCmdLastContactMap.ContainsKey(cmdId))
					{
						RunCmdLastContactMap.Remove(cmdId);
					}
				}
			}

			public bool IsPaused
			{
				get
				{
					lock (RunCmdLastContactMap)
					{
						return LastContact == DateTime.MaxValue;
					}
				}
			}

			public bool OverDue(TimeSpan RunCmdTimeout)
			{
				lock (RunCmdLastContactMap)
					{
						return ((DateTime.Now - RunCmdLastContactMap[cmdId].LastContact) > RunCmdTimeout);
					}
				
			}
			#endregion
		}

		private void RunCommandThreadProc(object param)
		{
			RunCommandThreadParam CmdParams = param as RunCommandThreadParam;
			if (CmdParams == null)
			{
				Debug.Trace(string.Format("RunCommandThreadProc CmdParams is null param != null:{0}", param != null));
				return;
			}
			try
			{
				Debug.Trace(string.Format("Entering RunCommandThreadProc, cmdId = {0}",CmdParams.cmdId));

				CmdParams.RunCmdException = null;
				if (pServer == IntPtr.Zero)
				{
					Debug.Trace("RunCommandThreadProc pServer is null");

					CmdParams.Results = false;
					CmdParams.RunCmdException = new P4Exception(ErrorSeverity.E_FATAL, "pServer is null");
					return;
				}
				if (CmdParams == null)
				{
					Debug.Trace("RunCommandThreadProc CmdParams is null");
					CmdParams.RunCmdException = new ArgumentNullException("CmdParams");
					return;
				}
#if DEBUG_TIMEOUT
			if (CmdParams.cmd == "TimeOutTest")
			{
				double timeout = RunCmdTimeout.TotalSeconds;

				double delta = 0;
				if ((CmdParams.argc > 0) && (CmdParams.args.Length >= 1))
				{
					double.TryParse(CmdParams.args[0], out delta);

					timeout += delta;
				}
				Thread.Sleep(TimeSpan.FromSeconds(timeout));
				CmdParams.Results = true;
				return;
			}
			else if (CmdParams.cmd == "LongTimeOutTest")
			{
				int timeout = (int) RunCmdTimeout.TotalSeconds;

				int delta = 0;
				if ((CmdParams.argc > 0) && (CmdParams.args.Length >= 1))
				{
					int.TryParse(CmdParams.args[0], out delta);

					delta *= 1000;
				}
				DateTime endTime = DateTime.Now + TimeSpan.FromSeconds(timeout*2);
				while (DateTime.Now < endTime)
				{
					Thread.Sleep(delta);

					InfoResultsCallback_Int(0, IntPtr.Zero);
				}
				CmdParams.Results = true;
				return;
			}
#endif
				Debug.Trace(string.Format("RunCommandThreadProc CmdParams.cmdId = {0}", CmdParams.cmdId));
				if (!isUnicode)
				{
					CmdParams.Results = P4Bridge.RunCommandA(	pServer,
																CmdParams.cmd,
																CmdParams.cmdId,
																CmdParams.tagged,
																CmdParams.args,
																CmdParams.argc);
				}
				else
				{
					using (PinnedByteArrays args_b =
						MarshalStringArrayToIntPtrArray(CmdParams.args, CmdParams.argc))
					{
						CmdParams.Results = P4Bridge.RunCommandW(	pServer,
																	CmdParams.cmd,
																	CmdParams.cmdId,
																	CmdParams.tagged,
																	(IntPtr[])args_b,
																	CmdParams.argc);
					}
				}
				Debug.Trace(string.Format("RunCommandThreadProc Command finished{1}, CmdParams.Results = {0}", CmdParams.Results, CmdParams.cmdId));
			}
			catch (ThreadAbortException ex) 
			{
				Debug.Trace(string.Format("RunCommandThreadProc ThreadAbortException caught{2}, {0}/r/n{1}", ex.Message, ex.StackTrace, CmdParams.cmdId));
				KeepAlive.CommandCompleted(CmdParams.cmdId);
			}
			catch (Exception ex)
			{
				Debug.Trace(string.Format("RunCommandThreadProc Exception caught{2}, {0}/r/n{1}", ex.Message, ex.StackTrace, CmdParams.cmdId));

				CmdParams.RunCmdException = ex;
			}
			finally
			{
				// don't let this crash us
				try
				{
					if ((KeepAlive != null) && (CmdParams != null))
					{
						KeepAlive.CommandCompleted(CmdParams.cmdId);
					}
					Debug.Trace(string.Format("RunCommandThreadProc finally clause {2}, KeepAlive != null:{0} CmdParams != null:{1}",
						KeepAlive != null, CmdParams != null, CmdParams.cmdId));
				}
				catch { }
			}
			return;
		}

		//need a unique id to send to the Client for the IKeepAlive interface
		private int next_cmdId = 1;
		private object cmdIdSyncObj = new object();
		public uint getCmdId()
		{
			lock (cmdIdSyncObj)
			{
				if (next_cmdId >= ushort.MaxValue)
				{
					next_cmdId = 1;
				} 
				// even though this is unsigned, don't want a negative integer, so mask off the high bit
				uint v = (((uint)Thread.CurrentThread.ManagedThreadId) << 16) & 0x7FFF0000;
				v |= ((uint) Interlocked.Increment(ref next_cmdId)) & 0x0000FFFF;
				return v;
			}
		}

		private List<RunCommandThreadParam> runningCommands = new List<RunCommandThreadParam>();

		/// <summary>
		/// Run a P4 command on the P4 Server
		/// </summary>
		/// <remarks>
		/// If the command fails, the error output will contain one or more 
		/// errors generated by the P4 server.
		/// </remarks>
		/// <param name="cmd">Command code</param>
		/// <param name="tagged">Use tagged output for the results</param>
		/// <param name="args">Arguments for the command</param>
		/// <param name="argc">Argument count</param>
		/// <returns>Success/Failure</returns>
		public bool RunCommand( string cmd,
								uint cmdId,
								bool tagged,
								String[] args,
								int argc)
		{
			if (_disposed)
			{
				throw new P4.P4Exception(ErrorSeverity.E_FATAL, "trying to run a command on a disposed server");
			}
			//if (disconnectTrigger != null)
			//{
			//    disconnectTrigger.Stop();
			//}
			bool results = false;

			RunCommandThreadParam CmdParams = new RunCommandThreadParam();
			CmdParams.Results = false;
			CmdParams.cmd = cmd;
			CmdParams.tagged = tagged;
			CmdParams.args = args;
			CmdParams.argc = argc;
			CmdParams.cmdId = cmdId;

			lock (runningCommands)
			{
				runningCommands.Add(CmdParams);
			}
			try
			{

				if ((KeepAlive != null) || (RunCmdTimeout > TimeSpan.Zero))
				{
					using (CmdContactTimer timer = new CmdContactTimer(RunCmdLastContactMap, cmdId))
					{
						ParameterizedThreadStart ts = new ParameterizedThreadStart(RunCommandThreadProc);
						Thread RunCommandThread = new Thread(ts);
						RunCommandThread.Name = string.Format("P4API.NET Run Command[{0:X8}]: {1}", cmdId, cmd);
						RunCommandThread.IsBackground = true;
						RunCommandThread.Start(CmdParams);

						if (KeepAlive != null)
						{
							TimeSpan delay = KeepAliveDelay;
							Debug.Trace(string.Format("RunCommand, KeepAlive != null"));
							while ((delay == TimeSpan.Zero) || (RunCommandThread.Join(delay) == false))
							{
								// set delay to a tenth of a second for later tests
								delay = TimeSpan.FromSeconds(.1);
								if (IsCommandPaused(cmdId))
								{
									// we're in a call back, so don't trigure the keep alive, just keep
									// waiting for the command to complete
									continue;
								}
								string cmdLine = cmd;
								if ((args != null) && (args.Length > 0))
								{
									for (int idx = 0; idx < args.Length; idx++)
									{
										cmdLine += " " + args[idx];
									}
								}
								// StartQuery won't return until the user cancels or 
								//  the command completes.
								bool canceled = KeepAlive.StartQueryCancel(this, cmdId, RunCommandThread, cmdLine);
								if (canceled)
								{
									KeepAlive.CommandCompleted(cmdId);
									string msg = string.Format("Command canceled by client: {0} ", cmdLine);
									throw new P4CommandCanceledException(ErrorSeverity.E_FATAL, msg);
								}
								break;
							}
						}
						else
						{
							while (RunCommandThread.Join(TimeSpan.FromSeconds(1)) == false)
							{
								if (RunCmdLastContactMap[cmdId].OverDue(RunCmdTimeout))
								{
									CancelCommand(cmdId);
									if (RunCommandThread.Join(TimeSpan.FromSeconds(1)) == false)
									{
										RunCommandThread.Abort();
									}
									else
									{
										P4Bridge.Disconnect(pServer);
									}
									string msg = string.Format("Command time out[{1}]: {0} ", cmd, cmdId);
									foreach (string arg in args)
									{
										if (arg != null)
										{
											msg += " " + arg;
										}
									}
									throw new P4CommandTimeOutException(ErrorSeverity.E_FATAL, msg);
								}
							}
						}
						Debug.Trace(string.Format("RunCommand Command[{1}] finished, CmdParams.Results = {0}", CmdParams.Results ? "true" : "false", cmdId));
						results = CmdParams.Results;
						if (CmdParams.RunCmdException != null)
						{
							throw CmdParams.RunCmdException;
						}
					}
				}
				else
				{
					// run command untimed with no option to cancel
					if (!isUnicode)
					{
						results = P4Bridge.RunCommandA(pServer,
														cmd,
														cmdId,
														tagged,
														args,
														argc);
					}
					else
					{
						using (PinnedByteArrays args_b = MarshalStringArrayToIntPtrArray(args,
																			   argc))
						{
							results = P4Bridge.RunCommandW(pServer,
															cmd,
															cmdId,
															tagged,
															(IntPtr[])args_b,
															argc);
						}
					}

				}

				if (!results)
				{
					Debug.Trace(string.Format("RunCommand Command [{0}] failed!", cmdId));
					// error 
					IntPtr pObj = P4Bridge.GetErrorResults(pServer, cmdId);

					if (pObj == IntPtr.Zero)
					{
						// no errors from command, so check for a connection error
						ConnectionError = ConnectionErrorInt;
						if (ConnectionError == null)
						{
							Debug.Trace(string.Format("RunCommand Command [{0}] failed! ConnectionError=null", cmdId));
							P4Exception.Throw(cmd, args, ErrorSeverity.E_FATAL, "Unknown Problem, can't continue");
						}
						else
						{
							Debug.Trace(string.Format("RunCommand Command [{1}] failed! ConnectionError={0}", ConnectionError, cmdId));
							P4Exception.Throw(cmd, args, ConnectionError);
						}
					}
					else
					{
						P4ClientErrorList _errorList = new P4ClientErrorList(this, pObj);
						P4Exception.Throw(cmd, args, _errorList, GetInfoResults(cmdId));
					}
					return false;
				}
				else
				{
					// may be some warnings in the list, so fetch it if it is not null
					IntPtr pObj = P4Bridge.GetErrorResults(pServer, cmdId);
					P4ClientErrorList _errorList = null;
					if (pObj != IntPtr.Zero)
					{
						_errorList = new P4ClientErrorList(this, pObj);
					}
					ConnectionError = null;
				}
			}
			finally
			{
				lock (runningCommands)
				{
					runningCommands.Remove(CmdParams);
				}
				if (IdleDisconnectWaitTime > 0)
				{
					if (DisconnectTimer == null)
					{
						DisconnectTimer = new System.Timers.Timer(100);
						DisconnectTimer.AutoReset = true;
						DisconnectTimer.Elapsed += new ElapsedEventHandler(OnDisconnectTimer);
						DisconnectTimer.Start();
					}
					else if (DisconnectTimer.Enabled == false)
					{
						DisconnectTimer.Start();
					}

					//if (disconnectTriggers == null)
					//{
					//    disconnectTriggers = new Dictionary<uint, DisconnectTrigger>();
					//}
					//DisconnectTrigger disconnectTrigger = null;
					//if (disconnectTriggers.ContainsKey(cmdId))
					//{
					//    disconnectTrigger = disconnectTriggers[cmdId];
					//    disconnectTrigger.Stop();
					//    disconnectTrigger.Dispose();
					//}
					//disconnectTrigger = new DisconnectTrigger(IdleDisconnectWaitTime, cmdId);
					//disconnectTrigger.AutoReset = false;
					//disconnectTrigger.Elapsed += new ElapsedEventHandler(OnDisconnectTrigger);
					//disconnectTrigger.Start();
					//disconnectTriggers[cmdId] = disconnectTrigger;
				}
			}
			return results;
		}

		/// <summary>
		/// Cancel a running command
		/// </summary>
		/// <param name="CmdId">Unique Id for the run of the command</param>
		public void CancelCommand(uint CmdId)
		{
			P4Bridge.CancelCommand(pServer, CmdId);
		}

		/// <summary>
		/// Release the UI created for a command after it has been completed
		/// </summary>
		/// <param name="cmdId">Unique Id for the run of the command</param>
		public void ReleaseConnection(uint CmdId)
		{
			P4Bridge.ReleaseConnection(pServer, CmdId, (UInt64)DateTime.Now.AddMilliseconds(IdleDisconnectWaitTime).Ticks);
		}

		/// <summary>
		/// Release the UI created for a command after it has been completed
		/// </summary>
		/// <param name="cmdId">Unique Id for the run of the command</param>
		internal void ReleaseConnection(uint CmdId, DateTime releaseTime)
		{
			P4Bridge.ReleaseConnection(pServer, CmdId, (UInt64)releaseTime.Ticks);
		}

		/// <summary>
		/// Free the UI created for a command after it is no longer needed
		/// </summary>
		/// <param name="cmdId">Unique Id for the run of the command</param>
		public int FreeConnections()
		{
			return P4Bridge.FreeConnections(pServer, (UInt64) DateTime.Now.Ticks);
		}

		/// <summary>
		/// Delegate used to send tagged output as it is generated.
		/// </summary>
		/// <remarks>
		/// This delegate will send a complete object after all of its fields 
		/// have been received by the callback from the bridge dll.
		/// </remarks>
		/// <param name="ObjId"></param>
		/// <param name="Obj"></param>
		public delegate void TaggedOutputDelegate(	uint cmdId, 
													int ObjId, 
													TaggedObject Obj);

		/// <summary>
		/// Event to broadcast tagged output
		/// </summary>
		public event TaggedOutputDelegate TaggedOutputReceived;

		/// <summary>
		/// Get the tagged output generated by a command
		/// </summary>
		/// <returns>A list of TaggedObjects comprising the tagged output.
		/// </returns>
		public TaggedObjectList GetTaggedOutput(uint cmdId)
		{
			IntPtr pData = P4Bridge.GetTaggedOutput(pServer, cmdId);

			if (pData == IntPtr.Zero)
			{
				return null;
			}
			TaggedObjectList objects = new TaggedObjectList();

			// use a StrDictListIterator to return all of the objects and 
			//  their keys.
			StrDictListIterator data = new StrDictListIterator(this, pData);

			while (data.NextItem())
			{
				TaggedObject currentObject = new TaggedObject();
				objects.Add(currentObject);

				KeyValuePair kv = null;
				while( ( kv = data.NextEntry() ) != null )
				{
					currentObject[kv.Key] = kv.Value;
				}
			}
			P4Bridge.Release(pData);
			return objects;
		}

		/// <summary>
		/// Delegate used to send errors as they are generated.
		/// </summary>
		/// <remarks>
		/// This delegate will send a block of data for each call received by 
		/// the callback from the bridge dll.
		/// </remarks>
		/// <param name="cmdId">Command Id of the command causing the error</param>
		/// <param name="severity">Severity of the error</param>
		/// <param name="errorNumber">Error number for the error</param>
		/// <param name="data">Error message</param>
		public delegate void ErrorDelegate(uint cmdId, int severity, int errorNumber, String data);
		/// <summary>
		/// Holds the call back passed to the bridge used to receive the 
		/// raw  data 
		/// </summary>
		P4CallBacks.ErrorDelegate
			ErrorCallbackFn_Int = null;

		/// <summary>
		/// Broadcast errors received
		/// </summary>
		public event ErrorDelegate ErrorReceived;

		/// <summary>
		/// Get a list of errors (if any) generated by a command
		/// </summary>
		/// <returns>A list of P4ClientErrors, null if no errors</returns>
		public P4ClientErrorList GetErrorResults(uint cmdId)
		{
			IntPtr pErr = P4Bridge.GetErrorResults( pServer, cmdId );

			if( pErr != IntPtr.Zero )
			{
				return new P4ClientErrorList(this, pErr);
			}
			return null;
		}

		/// <summary>
		/// Delegate used to send Info Results as they are generated.
		/// </summary>
		/// <remarks>
		/// This delegate will send a block of data for each call received by 
		/// the callback from the bridge dll.
		/// </remarks>
		/// <param name="level">Server supplied message level</param>
		/// <param name="data">Server supplied message data</param>
		public delegate void InfoResultsDelegate(uint cmdId, int msgId, int level, String data);

		/// <summary>
		/// Broadcast event for info results
		/// </summary>
		public event InfoResultsDelegate InfoResultsReceived;

		/// <summary>
		/// Get the information messages generated by the previous command
		/// </summary>
		/// <remarks>
		/// Each message is formatted as follows
		/// l:Message text
		///     where l is a single digit representing the message level
		/// </remarks>
		/// <returns>List of messages</returns>
		public P4ClientInfoMessageList GetInfoResults(uint cmdId)
		{
			IntPtr pInfoOut = P4Bridge.GetInfoResults( pServer, cmdId );

			if (pInfoOut != IntPtr.Zero)
			{
				return new P4ClientInfoMessageList(this, pInfoOut);
			}
			return null;
		}

		/// <summary>
		/// Delegate used to send Text Results as they are generated.
		/// </summary>
		/// <remarks>
		/// This delegate will send a block of data for each call received by 
		/// the callback from the bridge dll.
		/// </remarks>
		/// <param name="data">Text results generated by the command</param>
		public delegate void TextResultsDelegate(uint cmdId, String data);

		/// <summary>
		/// Broadcast event for text results
		/// </summary>
		public event TextResultsDelegate TextResultsReceived;

		/// <summary>
		/// Get the complete text results for the last command
		/// </summary>
		/// <returns></returns>
		public String GetTextResults(uint cmdID)
		{
			IntPtr pTextOut = P4Bridge.GetTextResults( pServer, cmdID );

			return MarshalPtrToString( pTextOut );
		}

		/// <summary>
		/// Delegate used to send binary output as it is generated.
		/// </summary>
		/// <remarks>
		/// This delegate will send a block of data for each call received by 
		/// the callback from the bridge dll.
		/// </remarks>
		/// <param name="data">Binary data generated by a command</param>
		public delegate void BinaryResultsDelegate(uint cmdId, byte[] data);

		/// <summary>
		/// Broadcast event for binary data
		/// </summary>
		public event BinaryResultsDelegate BinaryResultsReceived;

		/// <summary>
		/// Get the complete binary results for the last command
		/// </summary>
		/// <returns>The binary data</returns>
		public byte[] GetBinaryResults(uint cmdId)
		{
			int byteCount = P4Bridge.GetBinaryResultsCount( pServer, cmdId);
			if( byteCount <= 0 )
				return null;

			IntPtr pData = P4Bridge.GetBinaryResults( pServer, cmdId);
			if( pData == IntPtr.Zero )
				return null;

			return MarshalPtrToByteArrary( pData, byteCount );
		}


		/// <summary>
		/// Delegate used to commands as they are executed.
		/// </summary>
		/// <param name="data">Command line executed by the command</param>
		public delegate void CommandEchoDelegate(String data);

		/// <summary>
		/// Broadcast event for text results
		/// </summary>
		public event CommandEchoDelegate CommandEcho;

		/// <summary>
		/// Broadcast a the command line (cmd and args) on the CommandEcho event
		/// </summary>
		/// <remarks>
		/// Used to echo an executed command line back to the client
		/// </remarks>
		/// <param name="cmd">The P4 command.</param>
		/// <param name="args">The flags and parameters for the command.</param>
		public void EchoCommand(string cmd, StringList args)
		{
			if (CommandEcho != null)
			{
				string commandLine = cmd;
				if (args != null)
				{
					for (int idx = 0; idx < args.Count; idx++)
					{
						if (args[idx] != null)
						{
							commandLine += " " + args[idx];
						}
					}
				}
				CommandEcho(commandLine);
			}
		}

		/// <summary>
		/// Broadcast a string on the CommandEcho event
		/// </summary>
		/// <remarks>
		/// Used to echo command data back to the client
		/// </remarks>
		/// <param name="str">The string.</param>
		public void EchoCommand(string str)
		{
			if (CommandEcho != null)
			{
				CommandEcho(str);
			}
		}

		/// <summary>
		/// The data set for use by a command
		/// </summary>
		/// <remarks>
		/// If a command requires data not passed on the command line, such as 
		/// a client spec, it is passed to the P$ server by setting the data
		/// set in the P4 api.
		/// </remarks>
		public void SetDataSet(uint cmdId, string value)
		{
			if( isUnicode )
			{
				using( PinnedByteArray pData = MarshalStringToIntPtr( value ) )
				{
					P4Bridge.SetDataSetW( pServer, cmdId, pData );
				}
			}
			else
			{
				P4Bridge.SetDataSetA( pServer, cmdId, value );
			}
		}
		public String GetDataSet(uint cmdId)
		{
			IntPtr pData = P4Bridge.GetDataSet(pServer, cmdId);

			return MarshalPtrToString(pData);
		}

		/// <summary>
		/// Delegate used to provide a custom handler for input prompts from the p4api.
		/// </summary>
		/// <param name="msg"></param>
		/// <param name="displayText"></param>
		/// <returns></returns>
		public delegate String PromptHandlerDelegate(uint cmdId, String msg, bool displayText);

		/// <summary>
		/// Delegate used to process prompts for input from the server.
		/// </summary>
		public PromptHandlerDelegate PromptHandler;

		/// <summary>
		/// Delegate used to provide a custom handler for Resolve callbacks passing a ClientMerge object from the p4api.
		/// </summary>
		/// <returns></returns>
		public delegate P4ClientMerge.MergeStatus ResolveHandlerDelegate(uint cmdId, P4ClientMerge Merger);

		/// <summary>
		/// Delegate used to provide a custom handler for Resolve callbacks passing a ClientMerge object from the p4api.
		/// </summary>
		public ResolveHandlerDelegate ResolveHandler;

		/// <summary>
		/// Delegate used to provide a custom handler for Resolve callbacks passing a ClientResolve object from the p4api.
		/// </summary>
		/// <returns></returns>
		public delegate P4ClientMerge.MergeStatus ResolveAHandlerDelegate(uint cmdId, P4ClientResolve Resolver);

		/// <summary>
		/// Delegate used to provide a custom handler for Resolve callbacks passing a ClientResolve object from the p4api.
		/// </summary>
		public ResolveAHandlerDelegate ResolveAHandler;

		/// <summary>
		/// The parameters used by the connection
		/// </summary>
		/// <remarks>
		/// The  properties, client, port, user, and password, 
		/// represent the criteria used to connect to a P4 server. If one or
		/// more is changed, the bridge will drop the current connection if any
		/// and attempt to connect to the (possibly different) P4 server when
		/// the next command is executed. If it is desirable to validate the
		/// connection, execute a command.
		/// </remarks>
		public void SetConnectionData(string port, string user, string password, string client)
		{
			_ws_client = client;
			if (isUnicode)
			{
				using (PinnedByteArray pPort = MarshalStringToIntPtr(port),
						pUser = MarshalStringToIntPtr(user),
						pPassword = MarshalStringToIntPtr(password),
						pClient = MarshalStringToIntPtr(client))
				{
					P4Bridge.set_connectionW(pServer, pPort, pUser,pPassword, pClient);
				}
			}
			else
			{
				P4Bridge.set_connectionA(pServer, port, user, password, client);
			}
		}

		/// <summary>
		/// The client workspace used by the connection
		/// </summary>
		/// <remarks>
		/// The  properties, client, port, user, and password, 
		/// represent the criteria used to connect to a P4 server. If one or
		/// more is changed, the bridge will drop the current connection if any
		/// and attempt to connect to the (possibly different) P4 server when
		/// the next command is executed. If it is desirable to validate the
		/// connection, execute a command.
		/// </remarks>
		public String Client
		{
			get 
			{
				IntPtr pval = P4Bridge.get_client( pServer );

				return MarshalPtrToString( pval );
			}
			set
			{
				_ws_client = value;
				if( isUnicode )
				{
					using( PinnedByteArray pData = MarshalStringToIntPtr( value ) )
					{
						P4Bridge.set_clientW( pServer, pData );
					}
				}
				else
				{
					P4Bridge.set_clientA( pServer, value );
				}
			}
		}

		/// <summary>
		/// The user name used by the connection
		/// </summary>
		/// <remarks>
		/// The  properties, client, port, user, and password, 
		/// represent the criteria used to connect to a P4 server. If one or
		/// more is changed, the bridge will drop the current connection if any
		/// and attempt to connect to the (possibly different) P4 server when
		/// the next command is executed. If it is desirable to validate the
		/// connection, execute a command.
		/// </remarks>
		public String User
		{
			get
			{
				IntPtr pval = P4Bridge.get_user( pServer );

				return MarshalPtrToString( pval );
			}
			set
			{
				_user = value;
				if( isUnicode )
				{
					using( PinnedByteArray pData = MarshalStringToIntPtr( value ) )
					{
						P4Bridge.set_userW( pServer, pData );
					}
				}
				else
				{
					P4Bridge.set_userA( pServer, value );
				}
			}
		}

		/// <summary>
		/// The hostname:port used by the connection
		/// </summary>
		/// <remarks>
		/// The  properties, client, port, user, and password, 
		/// represent the criteria used to connect to a P4 server. If one or
		/// more is changed, the bridge will drop the current connection if any
		/// and attempt to connect to the (possibly different) P4 server when
		/// the next command is executed. If it is desirable to validate the
		/// connection, execute a command.
		/// </remarks>
		public String Port
		{
			get
			{
				IntPtr pval = P4Bridge.get_port( pServer );

				return MarshalPtrToString( pval );
			}
			set
			{
				_server = value;
				if( isUnicode )
				{
					using( PinnedByteArray pData = MarshalStringToIntPtr( value ) )
					{
						P4Bridge.set_portW( pServer, pData );
					}
				}
				else
				{
					P4Bridge.set_portA( pServer, value );
				}
			}
		}

		/// <summary>
		/// The user's password used by the connection
		/// </summary>
		/// <remarks>
		/// The  properties, client, port, user, and password, 
		/// represent the criteria used to connect to a P4 server. If one or
		/// more is changed, the bridge will drop the current connection if any
		/// and attempt to connect to the (possibly different) P4 server when
		/// the next command is executed. If it is desirable to validate the
		/// connection, execute a command.
		/// </remarks>
		public String Password
		{
			get
			{
				IntPtr pval = P4Bridge.get_password(pServer);

                return MarshalPtrToString(pval);
			}
			set
			{
				_pass = value;
				if (isUnicode)
				{
					using (PinnedByteArray pData = MarshalStringToIntPtr(value))
					{
						P4Bridge.set_passwordW(pServer, pData);
					}
				}
				else
				{
					P4Bridge.set_passwordA(pServer, value);
				}
			}
		}

		/// <summary>
		/// The program name used by the connection
		/// </summary>
		/// <remarks>
		/// The program name and version are recorded in the server logs when
		/// accessed by the client
		/// </remarks>
		public String ProgramName
		{
			get
			{
				IntPtr pval = P4Bridge.get_programName(pServer);

				return MarshalPtrToString(pval);
			}
			set
			{
					_prog_name = value;
				if (isUnicode)
				{
					using (PinnedByteArray pData = MarshalStringToIntPtr(_prog_name))
					{
						P4Bridge.set_programNameW(pServer, pData);
					}
				}
				else
				{
					P4Bridge.set_programNameA(pServer, _prog_name);
				}
			}
		}

		/// <summary>
		/// The program version used by the connection
		/// </summary>
		/// <remarks>
		/// The program name and version are recorded in the server logs when
		/// accessed by the client
		/// </remarks>
		public String ProgramVersion
		{
			get
			{
				IntPtr pval = P4Bridge.get_programVer(pServer);

				return MarshalPtrToString(pval);
			}
			set
			{
				_prog_ver = value;
				if (isUnicode)
				{
					using (PinnedByteArray pData = MarshalStringToIntPtr(_prog_ver))
					{
						P4Bridge.set_programVerW(pServer, pData);
					}
				}
				else
				{
					P4Bridge.set_programVerA(pServer, _prog_ver);
				}
			}
		}

		/// <summary>
		/// The current working directory (cwd) used by the p4 server
		/// </summary>
		/// <remarks>
		/// The  properties, client, port, user, and password, 
		/// represent the criteria used to connect to a P4 server. If one or
		/// more is changed, the bridge will drop the current connection if any
		/// and attempt to connect to the (possibly different) P4 server when
		/// the next command is executed. If it is desirable to validate the
		/// connection, execute a command.
		/// </remarks>
		public String CurrentWorkingDirectory
		{
			get
			{
				IntPtr pval = P4Bridge.get_cwd(pServer);

				return MarshalPtrToString(pval);
			}
			set
			{
				try
				{
					_cwd = value;
					if (isUnicode)
					{
						using (PinnedByteArray pData = MarshalStringToIntPtr(_cwd))
						{
							P4Bridge.set_cwdW(pServer, pData);
						}
					}
					else
					{
						P4Bridge.set_cwdA(pServer, _cwd);
					}
				}
				catch (Exception ex)
				{
					LogFile.LogException("P4Bridge Error", ex);
				}
			}
		}


		/// <summary>
		/// The character set used by the connection
		/// </summary>
		/// <remarks>
		/// The character set used to connect to Unicode servers is set by the
		/// bridge dll automatically (possibly overridden by P4CHARSET) based 
		/// on the current Windows code page.
		/// </remarks>
		public String CharacterSet
		{
			get
			{
				IntPtr pval = P4Bridge.get_charset(pServer);

				return Marshal.PtrToStringAnsi(pval);
			}
		}

		/// <summary>
		/// The config file used by the connection
		/// </summary>
		public String Config
		{
			get
			{
				IntPtr pval = P4Bridge.get_config(pServer);

				string val = MarshalPtrToStringUtf8_Int(pval);
				P4Bridge.Release(pval);

				return val;
			}
		}

		/// <summary>
		/// The config file that will be used by a given directory
		/// </summary>
		static public String GetConfig(string cwd)
		{
			IntPtr pval = IntPtr.Zero;
			using (PinnedByteArray pData = MarshalStringToIntPtr(Encoding.UTF8, cwd))
			{
				pval = P4Bridge.get_configW(pData);
			
			    if (pval != IntPtr.Zero)
			    {
				    string val = MarshalPtrToStringUtf8_Int(pval);
				    return val;
			    }
            }
			return null;
		}

		/// <summary>
		/// Get an environment setting used by the server, such as user, client, ..
		/// </summary>
		/// <param name="var">The name of the environment varible</param>
		/// <returns></returns>
		public static String Get(string var)
		{
			IntPtr pval = IntPtr.Zero;
			using (PinnedByteArray pData = MarshalStringToIntPtr(Encoding.UTF8, var))
			{
				pval = P4Bridge.GetW(pData);
			
			    if (pval != IntPtr.Zero)
			    {
				    string val = MarshalPtrToStringUtf8_Int(pval);
				    return val;
			    }
            }
			return null;
		}

		/// <summary>
		/// Set an environment setting used by the server, such as user, client, ..
		/// </summary>
		/// <param name="var">The name of the environment variable</param>
		/// <param name="val">The new value for the environment variable</param>
		/// <returns></returns>
		static public void Set(string var, string val)
		{
			using (PinnedByteArray pData1 = MarshalStringToIntPtr(Encoding.UTF8, var),
									pData2 = MarshalStringToIntPtr(Encoding.UTF8, val))
			{
				P4Bridge.SetW(pData1, pData2);
			}
		}

		/// <summary>
		/// Use the C++ API to determine if a file will be ignored
		/// </summary>
		/// <param name="path">The local path of the file</param>
		/// <returns>true if the file will be ignored</returns>
		public static bool IsIgnored(string path)
		{
				using (PinnedByteArray pData = MarshalStringToIntPtr(Encoding.UTF8, path))
				{
					return P4Bridge.IsIgnoredW(pData);
				}
		}

		/// <summary>
		/// Use the C++ API to determine the path of the ticket file
		/// </summary>
		/// <returns>The path for the ticket file</returns>
		static public string GetTicketFile()
		{
			IntPtr pval = P4Bridge.GetTicketFile();     // returns new string
			if (pval != IntPtr.Zero)
			{
				string val = MarshalPtrToStringUtf8_Int(pval);
				P4Bridge.Release(pval);
				return val;
			}
			return null;
		}

		/// <summary>
		/// Use the C++ API to find an existing ticket if a file will be ignored
		/// </summary>
		/// <param name="port">server:port for the connection</param>
		/// <param name="user">user name for the connection</param>
		/// <returns>The existing ticket if any</returns>
		public static string GetTicket(string port, string user)
		{
			using (PinnedByteArray pData1 = MarshalStringToIntPtr(Encoding.UTF8, port),
									pData2 = MarshalStringToIntPtr(Encoding.UTF8, user))
			{
				IntPtr pval = P4Bridge.GetTicket(pData1, pData2);   // Returns new string
				if (pval != IntPtr.Zero)
				{
					string val = MarshalPtrToStringUtf8_Int(pval);
					P4Bridge.Release(pval);
					return val;
				}
			}
			return null;
		}

		/// <summary>
		/// Use the C++ API to find an existing ticket if a file will be ignored
		/// </summary>
		/// <param name="port">server:port for the connection</param>
		/// <param name="user">user name for the connection</param>
		/// <returns>The existing ticket if any</returns>
		public static Credential GetTicketFileCredential(string port, string user)
		{
			using (PinnedByteArray pData1 = MarshalStringToIntPtr(Encoding.UTF8, port),
									pData2 = MarshalStringToIntPtr(Encoding.UTF8, user))
			{
				IntPtr pval = P4Bridge.GetTicket(pData1, pData2);  // returns new string
				if (pval != IntPtr.Zero)
				{
					string val = MarshalPtrToStringUtf8_Int(pval);
					P4Bridge.Release(pval);
					return new Credential(user, val);
				}
			}
			return null;
		}
	}
}