394 lines
14 KiB
C#
394 lines
14 KiB
C#
/*
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* Note to JL: Removed extension call syntax
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*
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* [The "BSD licence"]
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* Copyright (c) 2005-2008 Terence Parr
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* All rights reserved.
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*
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* Conversion to C#:
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* Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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namespace Antlr.Runtime.Debug {
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using System;
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using Antlr.Runtime.JavaExtensions;
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using IOException = System.IO.IOException;
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using ITreeAdaptor = Antlr.Runtime.Tree.ITreeAdaptor;
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using Socket = System.Net.Sockets.Socket;
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using StringBuilder = System.Text.StringBuilder;
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using TcpListener = System.Net.Sockets.TcpListener;
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/** <summary>
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* A proxy debug event listener that forwards events over a socket to
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* a debugger (or any other listener) using a simple text-based protocol;
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* one event per line. ANTLRWorks listens on server socket with a
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* RemoteDebugEventSocketListener instance. These two objects must therefore
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* be kept in sync. New events must be handled on both sides of socket.
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* </summary>
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*/
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public class DebugEventSocketProxy : BlankDebugEventListener {
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public const int DefaultDebuggerPort = 49100;
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protected int port = DefaultDebuggerPort;
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protected TcpListener serverSocket;
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protected Socket socket;
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protected string grammarFileName;
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//protected PrintWriter @out;
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//protected BufferedReader @in;
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/** <summary>Who am i debugging?</summary> */
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protected BaseRecognizer recognizer;
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/** <summary>
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* Almost certainly the recognizer will have adaptor set, but
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* we don't know how to cast it (Parser or TreeParser) to get
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* the adaptor field. Must be set with a constructor. :(
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* </summary>
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*/
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protected ITreeAdaptor adaptor;
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public DebugEventSocketProxy(BaseRecognizer recognizer, ITreeAdaptor adaptor) :
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this(recognizer, DefaultDebuggerPort, adaptor) {
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}
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public DebugEventSocketProxy(BaseRecognizer recognizer, int port, ITreeAdaptor adaptor) {
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this.grammarFileName = recognizer.GrammarFileName;
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this.adaptor = adaptor;
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this.port = port;
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}
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#region Properties
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public virtual ITreeAdaptor TreeAdaptor {
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get {
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return adaptor;
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}
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set {
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adaptor = value;
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}
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}
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#endregion
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public virtual void Handshake() {
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if (serverSocket == null) {
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System.Net.IPHostEntry hostInfo = System.Net.Dns.GetHostEntry("localhost");
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System.Net.IPAddress ipAddress = hostInfo.AddressList[0];
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serverSocket = new TcpListener(ipAddress, port);
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socket = serverSocket.AcceptSocket();
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socket.NoDelay = true;
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System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding();
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socket.Send(encoding.GetBytes("ANTLR " + DebugEventListenerConstants.ProtocolVersion + "\n"));
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socket.Send(encoding.GetBytes("grammar \"" + grammarFileName + "\n"));
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Ack();
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//serverSocket = new ServerSocket( port );
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//socket = serverSocket.accept();
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//socket.setTcpNoDelay( true );
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//OutputStream os = socket.getOutputStream();
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//OutputStreamWriter osw = new OutputStreamWriter( os, "UTF8" );
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//@out = new PrintWriter( new BufferedWriter( osw ) );
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//InputStream @is = socket.getInputStream();
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//InputStreamReader isr = new InputStreamReader( @is, "UTF8" );
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//@in = new BufferedReader( isr );
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//@out.println( "ANTLR " + DebugEventListenerConstants.PROTOCOL_VERSION );
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//@out.println( "grammar \"" + grammarFileName );
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//@out.flush();
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//ack();
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}
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}
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public override void Commence() {
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// don't bother sending event; listener will trigger upon connection
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}
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public override void Terminate() {
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Transmit("terminate");
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//@out.close();
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try {
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socket.Close();
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} catch (IOException ioe) {
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ExceptionExtensions.PrintStackTrace(ioe, Console.Error);
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}
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}
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protected virtual void Ack() {
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try {
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throw new NotImplementedException();
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//@in.readLine();
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} catch (IOException ioe) {
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ExceptionExtensions.PrintStackTrace(ioe, Console.Error);
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}
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}
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protected virtual void Transmit(string @event) {
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socket.Send(new System.Text.UTF8Encoding().GetBytes(@event + "\n"));
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//@out.println( @event );
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//@out.flush();
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Ack();
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}
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public override void EnterRule(string grammarFileName, string ruleName) {
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Transmit("enterRule\t" + grammarFileName + "\t" + ruleName);
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}
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public override void EnterAlt(int alt) {
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Transmit("enterAlt\t" + alt);
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}
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public override void ExitRule(string grammarFileName, string ruleName) {
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Transmit("exitRule\t" + grammarFileName + "\t" + ruleName);
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}
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public override void EnterSubRule(int decisionNumber) {
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Transmit("enterSubRule\t" + decisionNumber);
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}
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public override void ExitSubRule(int decisionNumber) {
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Transmit("exitSubRule\t" + decisionNumber);
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}
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public override void EnterDecision(int decisionNumber, bool couldBacktrack) {
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Transmit("enterDecision\t" + decisionNumber);
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}
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public override void ExitDecision(int decisionNumber) {
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Transmit("exitDecision\t" + decisionNumber);
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}
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public override void ConsumeToken(IToken t) {
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string buf = SerializeToken(t);
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Transmit("consumeToken\t" + buf);
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}
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public override void ConsumeHiddenToken(IToken t) {
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string buf = SerializeToken(t);
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Transmit("consumeHiddenToken\t" + buf);
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}
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public override void LT(int i, IToken t) {
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if (t != null)
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Transmit("LT\t" + i + "\t" + SerializeToken(t));
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}
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public override void Mark(int i) {
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Transmit("mark\t" + i);
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}
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public override void Rewind(int i) {
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Transmit("rewind\t" + i);
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}
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public override void Rewind() {
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Transmit("rewind");
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}
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public override void BeginBacktrack(int level) {
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Transmit("beginBacktrack\t" + level);
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}
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public override void EndBacktrack(int level, bool successful) {
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Transmit("endBacktrack\t" + level + "\t" + (successful ? DebugEventListenerConstants.True : DebugEventListenerConstants.False));
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}
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public override void Location(int line, int pos) {
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Transmit("location\t" + line + "\t" + pos);
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}
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public override void RecognitionException(RecognitionException e) {
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StringBuilder buf = new StringBuilder(50);
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buf.Append("exception\t");
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buf.Append(e.GetType().Name);
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// dump only the data common to all exceptions for now
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buf.Append("\t");
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buf.Append(e.Index);
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buf.Append("\t");
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buf.Append(e.Line);
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buf.Append("\t");
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buf.Append(e.CharPositionInLine);
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Transmit(buf.ToString());
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}
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public override void BeginResync() {
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Transmit("beginResync");
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}
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public override void EndResync() {
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Transmit("endResync");
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}
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public override void SemanticPredicate(bool result, string predicate) {
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StringBuilder buf = new StringBuilder(50);
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buf.Append("semanticPredicate\t");
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buf.Append(result);
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SerializeText(buf, predicate);
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Transmit(buf.ToString());
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}
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#region AST Parsing Events
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public override void ConsumeNode(object t) {
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StringBuilder buf = new StringBuilder(50);
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buf.Append("consumeNode");
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SerializeNode(buf, t);
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Transmit(buf.ToString());
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}
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public override void LT(int i, object t) {
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int ID = adaptor.GetUniqueID(t);
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string text = adaptor.GetText(t);
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int type = adaptor.GetType(t);
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StringBuilder buf = new StringBuilder(50);
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buf.Append("LN\t"); // lookahead node; distinguish from LT in protocol
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buf.Append(i);
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SerializeNode(buf, t);
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Transmit(buf.ToString());
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}
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protected virtual void SerializeNode(StringBuilder buf, object t) {
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int ID = adaptor.GetUniqueID(t);
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string text = adaptor.GetText(t);
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int type = adaptor.GetType(t);
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buf.Append("\t");
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buf.Append(ID);
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buf.Append("\t");
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buf.Append(type);
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IToken token = adaptor.GetToken(t);
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int line = -1;
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int pos = -1;
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if (token != null) {
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line = token.Line;
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pos = token.CharPositionInLine;
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}
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buf.Append("\t");
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buf.Append(line);
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buf.Append("\t");
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buf.Append(pos);
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int tokenIndex = adaptor.GetTokenStartIndex(t);
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buf.Append("\t");
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buf.Append(tokenIndex);
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SerializeText(buf, text);
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}
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#endregion
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#region AST Events
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public override void NilNode(object t) {
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int ID = adaptor.GetUniqueID(t);
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Transmit("nilNode\t" + ID);
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}
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public override void ErrorNode(object t) {
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int ID = adaptor.GetUniqueID(t);
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string text = t.ToString();
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StringBuilder buf = new StringBuilder(50);
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buf.Append("errorNode\t");
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buf.Append(ID);
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buf.Append("\t");
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buf.Append(TokenTypes.Invalid);
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SerializeText(buf, text);
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Transmit(buf.ToString());
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}
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public override void CreateNode(object t) {
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int ID = adaptor.GetUniqueID(t);
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string text = adaptor.GetText(t);
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int type = adaptor.GetType(t);
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StringBuilder buf = new StringBuilder(50);
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buf.Append("createNodeFromTokenElements\t");
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buf.Append(ID);
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buf.Append("\t");
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buf.Append(type);
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SerializeText(buf, text);
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Transmit(buf.ToString());
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}
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public override void CreateNode(object node, IToken token) {
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int ID = adaptor.GetUniqueID(node);
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int tokenIndex = token.TokenIndex;
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Transmit("createNode\t" + ID + "\t" + tokenIndex);
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}
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public override void BecomeRoot(object newRoot, object oldRoot) {
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int newRootID = adaptor.GetUniqueID(newRoot);
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int oldRootID = adaptor.GetUniqueID(oldRoot);
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Transmit("becomeRoot\t" + newRootID + "\t" + oldRootID);
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}
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public override void AddChild(object root, object child) {
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int rootID = adaptor.GetUniqueID(root);
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int childID = adaptor.GetUniqueID(child);
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Transmit("addChild\t" + rootID + "\t" + childID);
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}
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public override void SetTokenBoundaries(object t, int tokenStartIndex, int tokenStopIndex) {
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int ID = adaptor.GetUniqueID(t);
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Transmit("setTokenBoundaries\t" + ID + "\t" + tokenStartIndex + "\t" + tokenStopIndex);
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}
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#endregion
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#region Support
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protected virtual string SerializeToken(IToken t) {
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StringBuilder buf = new StringBuilder(50);
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buf.Append(t.TokenIndex);
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buf.Append('\t');
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buf.Append(t.Type);
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buf.Append('\t');
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buf.Append(t.Channel);
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buf.Append('\t');
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buf.Append(t.Line);
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buf.Append('\t');
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buf.Append(t.CharPositionInLine);
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SerializeText(buf, t.Text);
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return buf.ToString();
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}
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protected virtual void SerializeText(StringBuilder buf, string text) {
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buf.Append("\t\"");
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if (text == null) {
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text = "";
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}
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// escape \n and \r all text for token appears to exist on one line
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// this escape is slow but easy to understand
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text = EscapeNewlines(text);
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buf.Append(text);
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}
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protected virtual string EscapeNewlines(string txt) {
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txt = StringExtensions.replaceAll(txt, "%", "%25"); // escape all escape char ;)
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txt = StringExtensions.replaceAll(txt, "\n", "%0A"); // escape \n
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txt = StringExtensions.replaceAll(txt, "\r", "%0D"); // escape \r
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return txt;
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}
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#endregion
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}
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}
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