/*
***** BEGIN LICENSE BLOCK *****
* Version: CPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Common Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.eclipse.org/legal/cpl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
* Copyright (C) 2002-2004 Jan Arne Petersen <jpetersen@uni-bonn.de>
* Copyright (C) 2004 Thomas E Enebo <enebo@acm.org>
* Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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package org.jruby.parser;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import org.jruby.Ruby;
import org.jruby.RubyArray;
import org.jruby.RubyFile;
import org.jruby.RubyHash;
import org.jruby.RubyString;
import org.jruby.ast.Node;
import org.jruby.common.NullWarnings;
//import org.jruby.lexer.yacc.ByteListLexerSource;
import org.jruby.lexer.yacc.LexerSource;
import org.jruby.lexer.yacc.SyntaxException;
import org.jruby.runtime.DynamicScope;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.util.ByteList;
/**
* Serves as a simple facade for all the parsing magic.
*/
public class Parser {
private final Ruby runtime;
private volatile long totalTime;
private volatile int totalBytes;
public Parser(Ruby runtime) {
this.runtime = runtime;
}
public long getTotalTime() {
return totalTime;
}
public int getTotalBytes() {
return totalBytes;
}
public Node parseRewriter(String file, InputStream content,
ParserConfiguration configuration) throws SyntaxException {
long startTime = System.nanoTime();
DefaultRubyParser parser = RubyParserPool.getInstance().borrowParser();
parser.setWarnings(new NullWarnings());
LexerSource lexerSource = LexerSource.getSource(file, content, null, configuration);
try {
return parser.parse(configuration, lexerSource).getAST();
} finally {
RubyParserPool.getInstance().returnParser(parser);
totalTime += System.nanoTime() - startTime;
totalBytes += lexerSource.getOffset();
}
}
@SuppressWarnings("unchecked")
public Node parse(String file, ByteList content, DynamicScope blockScope,
ParserConfiguration configuration) {
return parse(file, new ByteArrayInputStream(content.bytes()), blockScope, configuration);
}
@SuppressWarnings("unchecked")
public Node parse(String file, InputStream content, DynamicScope blockScope,
ParserConfiguration configuration) {
long startTime = System.nanoTime();
IRubyObject scriptLines = runtime.getObject().fastGetConstantAt("SCRIPT_LINES__");
RubyArray list = null;
if (!configuration.isEvalParse() && scriptLines != null) {
if (scriptLines instanceof RubyHash) {
RubyString filename = runtime.newString(file);
ThreadContext context = runtime.getCurrentContext();
IRubyObject object = ((RubyHash) scriptLines).op_aref(context, filename);
list = (RubyArray) (object instanceof RubyArray ? object : runtime.newArray());
((RubyHash) scriptLines).op_aset(context, filename, list);
}
}
// We only need to pass in current scope if we are evaluating as a block (which
// is only done for evals). We need to pass this in so that we can appropriately scope
// down to captured scopes when we are parsing.
if (blockScope != null) {
configuration.parseAsBlock(blockScope);
}
DefaultRubyParser parser = null;
RubyParserResult result = null;
parser = RubyParserPool.getInstance().borrowParser();
parser.setWarnings(runtime.getWarnings());
LexerSource lexerSource = LexerSource.getSource(file, content, list, configuration);
try {
result = parser.parse(configuration, lexerSource);
if (result.getEndOffset() >= 0) {
IRubyObject verbose = runtime.getVerbose();
runtime.setVerbose(runtime.getNil());
runtime.defineGlobalConstant("DATA", new RubyFile(runtime, file, content));
runtime.setVerbose(verbose);
result.setEndOffset(-1);
}
} catch (SyntaxException e) {
StringBuilder buffer = new StringBuilder(100);
buffer.append(e.getPosition().getFile()).append(':');
buffer.append(e.getPosition().getEndLine() + 1).append(": ");
buffer.append(e.getMessage());
throw runtime.newSyntaxError(buffer.toString());
} finally {
RubyParserPool.getInstance().returnParser(parser);
}
// If variables were added then we may need to grow the dynamic scope to match the static
// one.
// FIXME: Make this so we only need to check this for blockScope != null. We cannot
// currently since we create the DynamicScope for a LocalStaticScope before parse begins.
// Refactoring should make this fixable.
if (result.getScope() != null) {
result.getScope().growIfNeeded();
}
Node ast = result.getAST();
totalTime += System.nanoTime() - startTime;
totalBytes += lexerSource.getOffset();
return ast;
}
}