/// <summary>
/// loop on created thread which processes communicates with the REPL window
/// </summary>
private void ReplLoop()
{
try
{
byte[] inp = new byte[4];
int size = 0;
while (true)
{
if (this.CheckForExitReplLoop())
{
break;
}
/* we receive a series of 4 byte commands. Each command then has it's
* own format which we must parse before continuing to the next command. */
this.Flush();
this._stream.ReadTimeout = 10000; // 10 sec
try
{
size = this._stream.Read(inp, 0, 4);
}
catch (IOException ex)
{
SocketException se = null;
if (null != ex.InnerException && null != (se = ex.InnerException as SocketException) && SocketError.TimedOut == se.SocketErrorCode)
{
#if DEBUG
ReplProcessor.DebugWrite("Time out reading from server.");
#endif
continue;
}
throw;
}
this._stream.ReadTimeout = Timeout.Infinite;
if (size < 1)
{
break;
}
this.Flush();
Action cmd = null;
if (this._COMMANDS.TryGetValue(ReplProcessor.Cmd(inp), out cmd))
{
cmd();
}
}
}
catch (Exception ex)
{
ReplProcessor.DebugWrite("Error in ReplLoop");
ReplProcessor.DebugWrite(ex.ToString());
this.ExitProcess();
Thread.Sleep(2000); // try and exit gracefully, then interrupt main if necessary
Environment.Exit(1);
this.InterruptMain(); // will never happen
}
}
private void Send(params string[] data)
{
if (null == data || 0 == data.Length)
{
return;
}
using (new SendLock(this))
{
foreach (var d in data)
{
ReplProcessor.DebugWrite(d + '\n');
this._stream.Write(ReplProcessor.Cmd(d));
}
}
}
/// <summary>
/// gets the signatures for the given expression
/// </summary>
private void CmdSigs()
{
string expression = this.ReadString();
object sigs = null;
try
{
// TODO
sigs = this.GetSignatures();
}
catch (Exception ex)
{
this.Send("SERR");
ReplProcessor.DebugWrite("error in eval");
ReplProcessor.DebugWrite(ex.ToString());
return;
}
using (new SendLock(this))
{
this._stream.Write(ReplBackend._SRES);
// TODO
}
}
/// <summary>
/// gets the list of members available for the given expression
/// </summary>
private void CmdMems()
{
string expression = this.ReadString();
MemberTuple memberTuple;
try
{
memberTuple = this.GetMembers(expression);
}
catch (Exception ex)
{
this.Send("MERR");
ReplProcessor.DebugWrite("error in eval");
ReplProcessor.DebugWrite(ex.ToString());
return;
}
using (new SendLock(this))
{
this._stream.Write(ReplBackend._MRES);
this.WriteString(memberTuple.Name);
this.WriteMemberDict(memberTuple.InstMembers);
this.WriteMemberDict(memberTuple.TypeMembers);
}
}
