| /* |
| [The "BSD license"] |
| Copyright (c) 2005-2009 Terence Parr |
| All rights reserved. |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions |
| are met: |
| 1. Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| 2. Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| 3. The name of the author may not be used to endorse or promote products |
| derived from this software without specific prior written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| package org.antlr.runtime.debug; |
| |
| import org.antlr.runtime.*; |
| import org.antlr.runtime.tree.TreeNodeStream; |
| import org.antlr.runtime.tree.TreeParser; |
| |
| import java.io.IOException; |
| |
| public class DebugTreeParser extends TreeParser { |
| /** Who to notify when events in the parser occur. */ |
| protected DebugEventListener dbg = null; |
| |
| /** Used to differentiate between fixed lookahead and cyclic DFA decisions |
| * while profiling. |
| */ |
| public boolean isCyclicDecision = false; |
| |
| /** Create a normal parser except wrap the token stream in a debug |
| * proxy that fires consume events. |
| */ |
| public DebugTreeParser(TreeNodeStream input, DebugEventListener dbg, RecognizerSharedState state) { |
| super(input instanceof DebugTreeNodeStream?input:new DebugTreeNodeStream(input,dbg), state); |
| setDebugListener(dbg); |
| } |
| |
| public DebugTreeParser(TreeNodeStream input, RecognizerSharedState state) { |
| super(input instanceof DebugTreeNodeStream?input:new DebugTreeNodeStream(input,null), state); |
| } |
| |
| public DebugTreeParser(TreeNodeStream input, DebugEventListener dbg) { |
| this(input instanceof DebugTreeNodeStream?input:new DebugTreeNodeStream(input,dbg), dbg, null); |
| } |
| |
| /** Provide a new debug event listener for this parser. Notify the |
| * input stream too that it should send events to this listener. |
| */ |
| public void setDebugListener(DebugEventListener dbg) { |
| if ( input instanceof DebugTreeNodeStream ) { |
| ((DebugTreeNodeStream)input).setDebugListener(dbg); |
| } |
| this.dbg = dbg; |
| } |
| |
| public DebugEventListener getDebugListener() { |
| return dbg; |
| } |
| |
| public void reportError(IOException e) { |
| System.err.println(e); |
| e.printStackTrace(System.err); |
| } |
| |
| public void reportError(RecognitionException e) { |
| dbg.recognitionException(e); |
| } |
| |
| protected Object getMissingSymbol(IntStream input, |
| RecognitionException e, |
| int expectedTokenType, |
| BitSet follow) |
| { |
| Object o = super.getMissingSymbol(input, e, expectedTokenType, follow); |
| dbg.consumeNode(o); |
| return o; |
| } |
| |
| public void beginResync() { |
| dbg.beginResync(); |
| } |
| |
| public void endResync() { |
| dbg.endResync(); |
| } |
| |
| public void beginBacktrack(int level) { |
| dbg.beginBacktrack(level); |
| } |
| |
| public void endBacktrack(int level, boolean successful) { |
| dbg.endBacktrack(level,successful); |
| } |
| } |