jaroslav@0
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/*
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jaroslav@0
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Java 4 Browser Bytecode Translator
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jaroslav@0
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Copyright (C) 2012-2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, version 2 of the License.
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jaroslav@0
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. Look for COPYING file in the top folder.
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If not, see http://opensource.org/licenses/GPL-2.0.
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*/
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package org.apidesign.vm4brwsr;
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jaroslav@0
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.ArrayList;
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import java.util.Collection;
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jaroslav@0
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import java.util.List;
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jaroslav@2
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import static org.netbeans.modules.classfile.ByteCodes.*;
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import org.netbeans.modules.classfile.CPClassInfo;
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import org.netbeans.modules.classfile.CPEntry;
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import org.netbeans.modules.classfile.CPFieldInfo;
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import org.netbeans.modules.classfile.CPMethodInfo;
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jaroslav@21
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import org.netbeans.modules.classfile.CPStringInfo;
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import org.netbeans.modules.classfile.ClassFile;
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jaroslav@13
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import org.netbeans.modules.classfile.ClassName;
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jaroslav@0
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import org.netbeans.modules.classfile.Code;
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jaroslav@0
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import org.netbeans.modules.classfile.Method;
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jaroslav@0
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import org.netbeans.modules.classfile.Parameter;
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jaroslav@9
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import org.netbeans.modules.classfile.Variable;
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/** Translator of the code inside class files to JavaScript.
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jaroslav@0
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*
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* @author Jaroslav Tulach <jtulach@netbeans.org>
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*/
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jaroslav@0
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public final class ByteCodeToJavaScript {
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jaroslav@0
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private final ClassFile jc;
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jaroslav@0
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private final Appendable out;
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jaroslav@18
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private final Collection<? super String> references;
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jaroslav@0
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jaroslav@18
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private ByteCodeToJavaScript(
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jaroslav@18
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ClassFile jc, Appendable out, Collection<? super String> references
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jaroslav@18
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) {
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jaroslav@0
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this.jc = jc;
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jaroslav@0
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this.out = out;
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jaroslav@18
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this.references = references;
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jaroslav@0
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}
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jaroslav@18
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jaroslav@18
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/**
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* Converts a given class file to a JavaScript version.
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jaroslav@18
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*
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jaroslav@0
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* @param classFile input stream with code of the .class file
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jaroslav@0
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* @param out a {@link StringBuilder} or similar to generate the output to
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jaroslav@18
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* @param references a write only collection where the system adds list of
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* other classes that were referenced and should be loaded in order the
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* generated JavaScript code works properly. The names are in internal
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jaroslav@18
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* JVM form so String is <code>java/lang/String</code>. Can be <code>null</code>
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jaroslav@18
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* if one is not interested in knowing references
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jaroslav@0
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* @throws IOException if something goes wrong during read or write or translating
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jaroslav@0
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*/
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jaroslav@18
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jaroslav@18
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public static void compile(
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jaroslav@18
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InputStream classFile, Appendable out,
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jaroslav@18
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Collection<? super String> references
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jaroslav@18
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) throws IOException {
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jaroslav@0
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ClassFile jc = new ClassFile(classFile, true);
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jaroslav@18
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ByteCodeToJavaScript compiler = new ByteCodeToJavaScript(
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jaroslav@18
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jc, out, references
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jaroslav@18
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);
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jaroslav@21
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List<String> toInitilize = new ArrayList<String>();
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jaroslav@0
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for (Method m : jc.getMethods()) {
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jaroslav@0
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if (m.isStatic()) {
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jaroslav@21
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compiler.generateStaticMethod(m, toInitilize);
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jaroslav@10
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} else {
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jaroslav@10
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compiler.generateInstanceMethod(m);
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jaroslav@0
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}
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jaroslav@0
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}
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jaroslav@9
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for (Variable v : jc.getVariables()) {
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jaroslav@9
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if (v.isStatic()) {
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jaroslav@9
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compiler.generateStaticField(v);
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jaroslav@9
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}
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jaroslav@9
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}
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jaroslav@10
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jaroslav@18
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final String className = jc.getName().getInternalName().replace('/', '_');
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jaroslav@13
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out.append("\nfunction ").append(className);
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jaroslav@10
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out.append("() {");
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jaroslav@10
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for (Method m : jc.getMethods()) {
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jaroslav@10
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if (!m.isStatic()) {
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jaroslav@12
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compiler.generateMethodReference(m);
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jaroslav@10
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}
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jaroslav@10
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}
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jaroslav@10
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for (Variable v : jc.getVariables()) {
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jaroslav@10
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if (!v.isStatic()) {
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jaroslav@10
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out.append("\n this." + v.getName() + " = 0;");
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jaroslav@10
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}
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jaroslav@10
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}
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jaroslav@17
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out.append("\n this.$instOf_").append(className).append(" = true;");
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jaroslav@10
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out.append("\n}");
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jaroslav@13
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ClassName sc = jc.getSuperClass();
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jaroslav@13
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if (sc != null) {
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jaroslav@21
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out.append("\n").append(className)
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.append(".prototype = new ").append(sc.getInternalName().replace('/', '_'));
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jaroslav@13
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}
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jaroslav@21
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for (String init : toInitilize) {
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jaroslav@21
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out.append("\n").append(init).append("();");
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jaroslav@21
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}
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jaroslav@0
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}
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jaroslav@21
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private void generateStaticMethod(Method m, List<String> toInitilize) throws IOException {
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jaroslav@21
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final String mn = findMethodName(m);
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jaroslav@1
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out.append("\nfunction ").append(
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jaroslav@18
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jc.getName().getInternalName().replace('/', '_')
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jaroslav@21
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).append('_').append(mn);
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jaroslav@21
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if (mn.equals("classV")) {
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jaroslav@21
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toInitilize.add(jc.getName().getInternalName().replace('/', '_') + '_' + mn);
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jaroslav@21
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}
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jaroslav@0
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out.append('(');
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jaroslav@0
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String space = "";
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jaroslav@10
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List<Parameter> args = m.getParameters();
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jaroslav@2
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for (int index = 0, i = 0; i < args.size(); i++) {
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jaroslav@0
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out.append(space);
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jaroslav@2
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out.append("arg").append(String.valueOf(index));
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jaroslav@0
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space = ",";
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jaroslav@2
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final String desc = args.get(i).getDescriptor();
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jaroslav@3
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130 |
if ("D".equals(desc) || "J".equals(desc)) {
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jaroslav@2
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131 |
index += 2;
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jaroslav@2
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132 |
} else {
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jaroslav@2
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index++;
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jaroslav@2
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}
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jaroslav@0
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}
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jaroslav@5
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out.append(") {").append("\n");
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jaroslav@0
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137 |
final Code code = m.getCode();
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jaroslav@18
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138 |
if (code != null) {
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jaroslav@18
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139 |
int len = code.getMaxLocals();
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jaroslav@18
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140 |
for (int index = args.size(), i = args.size(); i < len; i++) {
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jaroslav@18
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141 |
out.append(" var ");
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jaroslav@18
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142 |
out.append("arg").append(String.valueOf(i)).append(";\n");
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jaroslav@18
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143 |
}
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jaroslav@21
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144 |
out.append(" var stack = new Array();\n");
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jaroslav@18
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145 |
produceCode(code.getByteCodes());
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jaroslav@18
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146 |
} else {
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jaroslav@18
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147 |
out.append(" /* no code found for ").append(m.getTypeSignature()).append(" */\n");
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jaroslav@0
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148 |
}
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jaroslav@10
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149 |
out.append("}");
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jaroslav@10
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150 |
}
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jaroslav@10
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151 |
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jaroslav@12
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152 |
private void generateMethodReference(Method m) throws IOException {
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jaroslav@12
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153 |
final String name = findMethodName(m);
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jaroslav@12
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154 |
out.append("\n this.").append(name).append(" = ")
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jaroslav@18
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.append(jc.getName().getInternalName().replace('/', '_'))
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jaroslav@12
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156 |
.append('_').append(name).append(";");
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jaroslav@12
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157 |
}
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jaroslav@12
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158 |
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jaroslav@10
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159 |
private void generateInstanceMethod(Method m) throws IOException {
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jaroslav@10
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160 |
out.append("\nfunction ").append(
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jaroslav@18
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161 |
jc.getName().getInternalName().replace('/', '_')
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jaroslav@10
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162 |
).append('_').append(findMethodName(m));
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jaroslav@10
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163 |
out.append("(arg0");
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jaroslav@10
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164 |
String space = ",";
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jaroslav@10
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165 |
List<Parameter> args = m.getParameters();
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jaroslav@10
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166 |
for (int index = 1, i = 0; i < args.size(); i++) {
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jaroslav@10
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167 |
out.append(space);
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jaroslav@10
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168 |
out.append("arg").append(String.valueOf(index));
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jaroslav@10
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169 |
final String desc = args.get(i).getDescriptor();
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jaroslav@10
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170 |
if ("D".equals(desc) || "J".equals(desc)) {
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jaroslav@10
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171 |
index += 2;
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jaroslav@10
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172 |
} else {
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jaroslav@10
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173 |
index++;
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jaroslav@10
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174 |
}
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jaroslav@10
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175 |
}
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jaroslav@10
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176 |
out.append(") {").append("\n");
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jaroslav@10
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177 |
final Code code = m.getCode();
|
jaroslav@18
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178 |
if (code != null) {
|
jaroslav@18
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179 |
int len = code.getMaxLocals();
|
jaroslav@18
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180 |
for (int index = args.size(), i = args.size(); i < len; i++) {
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jaroslav@18
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181 |
out.append(" var ");
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jaroslav@18
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182 |
out.append("arg").append(String.valueOf(i + 1)).append(";\n");
|
jaroslav@18
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183 |
}
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jaroslav@18
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184 |
out.append(";\n var stack = new Array(");
|
jaroslav@18
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185 |
out.append(Integer.toString(code.getMaxStack()));
|
jaroslav@18
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186 |
out.append(");\n");
|
jaroslav@18
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187 |
produceCode(code.getByteCodes());
|
jaroslav@18
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188 |
} else {
|
jaroslav@18
|
189 |
out.append(" /* no code found for ").append(m.getTypeSignature()).append(" */\n");
|
jaroslav@10
|
190 |
}
|
jaroslav@0
|
191 |
out.append("}");
|
jaroslav@0
|
192 |
}
|
jaroslav@0
|
193 |
|
jaroslav@0
|
194 |
private void produceCode(byte[] byteCodes) throws IOException {
|
jaroslav@10
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195 |
out.append("\n var gt = 0;\n for(;;) switch(gt) {\n");
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jaroslav@0
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196 |
for (int i = 0; i < byteCodes.length; i++) {
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jaroslav@0
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197 |
int prev = i;
|
jaroslav@10
|
198 |
out.append(" case " + i).append(": ");
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jaroslav@0
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199 |
final int c = (byteCodes[i] + 256) % 256;
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jaroslav@0
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200 |
switch (c) {
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jaroslav@2
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201 |
case bc_aload_0:
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jaroslav@2
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202 |
case bc_iload_0:
|
jaroslav@2
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203 |
case bc_lload_0:
|
jaroslav@2
|
204 |
case bc_fload_0:
|
jaroslav@2
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205 |
case bc_dload_0:
|
jaroslav@0
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206 |
out.append("stack.push(arg0);");
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jaroslav@0
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207 |
break;
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jaroslav@2
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208 |
case bc_aload_1:
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jaroslav@2
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209 |
case bc_iload_1:
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jaroslav@2
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210 |
case bc_lload_1:
|
jaroslav@2
|
211 |
case bc_fload_1:
|
jaroslav@2
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212 |
case bc_dload_1:
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jaroslav@0
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213 |
out.append("stack.push(arg1);");
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jaroslav@0
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214 |
break;
|
jaroslav@2
|
215 |
case bc_aload_2:
|
jaroslav@2
|
216 |
case bc_iload_2:
|
jaroslav@2
|
217 |
case bc_lload_2:
|
jaroslav@2
|
218 |
case bc_fload_2:
|
jaroslav@2
|
219 |
case bc_dload_2:
|
jaroslav@2
|
220 |
out.append("stack.push(arg2);");
|
jaroslav@2
|
221 |
break;
|
jaroslav@3
|
222 |
case bc_aload_3:
|
jaroslav@3
|
223 |
case bc_iload_3:
|
jaroslav@3
|
224 |
case bc_lload_3:
|
jaroslav@3
|
225 |
case bc_fload_3:
|
jaroslav@3
|
226 |
case bc_dload_3:
|
jaroslav@3
|
227 |
out.append("stack.push(arg3);");
|
jaroslav@3
|
228 |
break;
|
jaroslav@3
|
229 |
case bc_iload:
|
jaroslav@3
|
230 |
case bc_lload:
|
jaroslav@3
|
231 |
case bc_fload:
|
jaroslav@3
|
232 |
case bc_dload:
|
jaroslav@3
|
233 |
case bc_aload: {
|
jaroslav@3
|
234 |
final int indx = (byteCodes[++i] + 256) % 256;
|
jaroslav@3
|
235 |
out.append("stack.push(arg").append(indx + ");");
|
jaroslav@3
|
236 |
break;
|
jaroslav@3
|
237 |
}
|
jaroslav@8
|
238 |
case bc_astore_0:
|
jaroslav@5
|
239 |
case bc_istore_0:
|
jaroslav@5
|
240 |
case bc_lstore_0:
|
jaroslav@5
|
241 |
case bc_fstore_0:
|
jaroslav@5
|
242 |
case bc_dstore_0:
|
jaroslav@5
|
243 |
out.append("arg0 = stack.pop();");
|
jaroslav@5
|
244 |
break;
|
jaroslav@8
|
245 |
case bc_astore_1:
|
jaroslav@5
|
246 |
case bc_istore_1:
|
jaroslav@5
|
247 |
case bc_lstore_1:
|
jaroslav@5
|
248 |
case bc_fstore_1:
|
jaroslav@5
|
249 |
case bc_dstore_1:
|
jaroslav@5
|
250 |
out.append("arg1 = stack.pop();");
|
jaroslav@5
|
251 |
break;
|
jaroslav@8
|
252 |
case bc_astore_2:
|
jaroslav@5
|
253 |
case bc_istore_2:
|
jaroslav@5
|
254 |
case bc_lstore_2:
|
jaroslav@5
|
255 |
case bc_fstore_2:
|
jaroslav@5
|
256 |
case bc_dstore_2:
|
jaroslav@5
|
257 |
out.append("arg2 = stack.pop();");
|
jaroslav@5
|
258 |
break;
|
jaroslav@8
|
259 |
case bc_astore_3:
|
jaroslav@5
|
260 |
case bc_istore_3:
|
jaroslav@5
|
261 |
case bc_lstore_3:
|
jaroslav@5
|
262 |
case bc_fstore_3:
|
jaroslav@5
|
263 |
case bc_dstore_3:
|
jaroslav@5
|
264 |
out.append("arg3 = stack.pop();");
|
jaroslav@5
|
265 |
break;
|
jaroslav@2
|
266 |
case bc_iadd:
|
jaroslav@2
|
267 |
case bc_ladd:
|
jaroslav@2
|
268 |
case bc_fadd:
|
jaroslav@2
|
269 |
case bc_dadd:
|
jaroslav@0
|
270 |
out.append("stack.push(stack.pop() + stack.pop());");
|
jaroslav@0
|
271 |
break;
|
jaroslav@2
|
272 |
case bc_isub:
|
jaroslav@2
|
273 |
case bc_lsub:
|
jaroslav@2
|
274 |
case bc_fsub:
|
jaroslav@2
|
275 |
case bc_dsub:
|
jaroslav@3
|
276 |
out.append("{ var tmp = stack.pop(); stack.push(stack.pop() - tmp); }");
|
jaroslav@2
|
277 |
break;
|
jaroslav@2
|
278 |
case bc_imul:
|
jaroslav@2
|
279 |
case bc_lmul:
|
jaroslav@2
|
280 |
case bc_fmul:
|
jaroslav@2
|
281 |
case bc_dmul:
|
jaroslav@1
|
282 |
out.append("stack.push(stack.pop() * stack.pop());");
|
jaroslav@1
|
283 |
break;
|
jaroslav@3
|
284 |
case bc_idiv:
|
jaroslav@3
|
285 |
case bc_ldiv:
|
jaroslav@3
|
286 |
out.append("{ var tmp = stack.pop(); stack.push(Math.floor(stack.pop() / tmp)); }");
|
jaroslav@3
|
287 |
break;
|
jaroslav@3
|
288 |
case bc_fdiv:
|
jaroslav@3
|
289 |
case bc_ddiv:
|
jaroslav@3
|
290 |
out.append("{ var tmp = stack.pop(); stack.push(stack.pop() / tmp); }");
|
jaroslav@3
|
291 |
break;
|
jaroslav@7
|
292 |
case bc_iand:
|
jaroslav@7
|
293 |
case bc_land:
|
jaroslav@7
|
294 |
out.append("stack.push(stack.pop() & stack.pop());");
|
jaroslav@7
|
295 |
break;
|
jaroslav@7
|
296 |
case bc_ior:
|
jaroslav@7
|
297 |
case bc_lor:
|
jaroslav@7
|
298 |
out.append("stack.push(stack.pop() | stack.pop());");
|
jaroslav@7
|
299 |
break;
|
jaroslav@6
|
300 |
case bc_ixor:
|
jaroslav@6
|
301 |
case bc_lxor:
|
jaroslav@6
|
302 |
out.append("stack.push(stack.pop() ^ stack.pop());");
|
jaroslav@6
|
303 |
break;
|
jaroslav@5
|
304 |
case bc_iinc: {
|
jaroslav@5
|
305 |
final int varIndx = (byteCodes[++i] + 256) % 256;
|
jaroslav@5
|
306 |
final int incrBy = (byteCodes[++i] + 256) % 256;
|
jaroslav@5
|
307 |
if (incrBy == 1) {
|
jaroslav@5
|
308 |
out.append("arg" + varIndx).append("++;");
|
jaroslav@5
|
309 |
} else {
|
jaroslav@5
|
310 |
out.append("arg" + varIndx).append(" += " + incrBy).append(";");
|
jaroslav@5
|
311 |
}
|
jaroslav@5
|
312 |
break;
|
jaroslav@5
|
313 |
}
|
jaroslav@10
|
314 |
case bc_return:
|
jaroslav@10
|
315 |
out.append("return;");
|
jaroslav@10
|
316 |
break;
|
jaroslav@2
|
317 |
case bc_ireturn:
|
jaroslav@2
|
318 |
case bc_lreturn:
|
jaroslav@2
|
319 |
case bc_freturn:
|
jaroslav@2
|
320 |
case bc_dreturn:
|
jaroslav@10
|
321 |
case bc_areturn:
|
jaroslav@0
|
322 |
out.append("return stack.pop();");
|
jaroslav@1
|
323 |
break;
|
jaroslav@2
|
324 |
case bc_i2l:
|
jaroslav@2
|
325 |
case bc_i2f:
|
jaroslav@2
|
326 |
case bc_i2d:
|
jaroslav@2
|
327 |
case bc_l2i:
|
jaroslav@3
|
328 |
// max int check?
|
jaroslav@2
|
329 |
case bc_l2f:
|
jaroslav@2
|
330 |
case bc_l2d:
|
jaroslav@3
|
331 |
case bc_f2d:
|
jaroslav@3
|
332 |
case bc_d2f:
|
jaroslav@3
|
333 |
out.append("/* number conversion */");
|
jaroslav@3
|
334 |
break;
|
jaroslav@2
|
335 |
case bc_f2i:
|
jaroslav@2
|
336 |
case bc_f2l:
|
jaroslav@2
|
337 |
case bc_d2i:
|
jaroslav@2
|
338 |
case bc_d2l:
|
jaroslav@3
|
339 |
out.append("stack.push(Math.floor(stack.pop()));");
|
jaroslav@3
|
340 |
break;
|
jaroslav@2
|
341 |
case bc_i2b:
|
jaroslav@2
|
342 |
case bc_i2c:
|
jaroslav@2
|
343 |
case bc_i2s:
|
jaroslav@2
|
344 |
out.append("/* number conversion */");
|
jaroslav@2
|
345 |
break;
|
jaroslav@4
|
346 |
case bc_iconst_0:
|
jaroslav@4
|
347 |
case bc_dconst_0:
|
jaroslav@4
|
348 |
case bc_lconst_0:
|
jaroslav@4
|
349 |
case bc_fconst_0:
|
jaroslav@4
|
350 |
out.append("stack.push(0);");
|
jaroslav@4
|
351 |
break;
|
jaroslav@4
|
352 |
case bc_iconst_1:
|
jaroslav@4
|
353 |
case bc_lconst_1:
|
jaroslav@4
|
354 |
case bc_fconst_1:
|
jaroslav@4
|
355 |
case bc_dconst_1:
|
jaroslav@4
|
356 |
out.append("stack.push(1);");
|
jaroslav@4
|
357 |
break;
|
jaroslav@4
|
358 |
case bc_iconst_2:
|
jaroslav@4
|
359 |
case bc_fconst_2:
|
jaroslav@4
|
360 |
out.append("stack.push(2);");
|
jaroslav@4
|
361 |
break;
|
jaroslav@4
|
362 |
case bc_iconst_3:
|
jaroslav@4
|
363 |
out.append("stack.push(3);");
|
jaroslav@4
|
364 |
break;
|
jaroslav@4
|
365 |
case bc_iconst_4:
|
jaroslav@4
|
366 |
out.append("stack.push(4);");
|
jaroslav@4
|
367 |
break;
|
jaroslav@4
|
368 |
case bc_iconst_5:
|
jaroslav@4
|
369 |
out.append("stack.push(5);");
|
jaroslav@4
|
370 |
break;
|
jaroslav@20
|
371 |
case bc_ldc: {
|
jaroslav@21
|
372 |
int indx = byteCodes[++i];
|
jaroslav@20
|
373 |
CPEntry entry = jc.getConstantPool().get(indx);
|
jaroslav@21
|
374 |
String v = encodeConstant(entry);
|
jaroslav@21
|
375 |
out.append("stack.push(").append(v).append(");");
|
jaroslav@20
|
376 |
break;
|
jaroslav@20
|
377 |
}
|
jaroslav@8
|
378 |
case bc_ldc_w:
|
jaroslav@8
|
379 |
case bc_ldc2_w: {
|
jaroslav@8
|
380 |
int indx = readIntArg(byteCodes, i);
|
jaroslav@8
|
381 |
CPEntry entry = jc.getConstantPool().get(indx);
|
jaroslav@8
|
382 |
i += 2;
|
jaroslav@21
|
383 |
String v = encodeConstant(entry);
|
jaroslav@21
|
384 |
out.append("stack.push(").append(v).append(");");
|
jaroslav@8
|
385 |
break;
|
jaroslav@8
|
386 |
}
|
jaroslav@20
|
387 |
case bc_lcmp:
|
jaroslav@20
|
388 |
case bc_fcmpl:
|
jaroslav@20
|
389 |
case bc_fcmpg:
|
jaroslav@20
|
390 |
case bc_dcmpl:
|
jaroslav@20
|
391 |
case bc_dcmpg: {
|
jaroslav@20
|
392 |
out.append("{ var delta = stack.pop() - stack.pop(); stack.push(delta < 0 ?-1 : (delta == 0 ? 0 : 1)); }");
|
jaroslav@20
|
393 |
break;
|
jaroslav@20
|
394 |
}
|
jaroslav@4
|
395 |
case bc_if_icmpeq: {
|
jaroslav@4
|
396 |
i = generateIf(byteCodes, i, "==");
|
jaroslav@4
|
397 |
break;
|
jaroslav@4
|
398 |
}
|
jaroslav@7
|
399 |
case bc_ifeq: {
|
jaroslav@7
|
400 |
int indx = i + readIntArg(byteCodes, i);
|
jaroslav@7
|
401 |
out.append("if (stack.pop() == 0) { gt = " + indx);
|
jaroslav@7
|
402 |
out.append("; continue; }");
|
jaroslav@7
|
403 |
i += 2;
|
jaroslav@7
|
404 |
break;
|
jaroslav@7
|
405 |
}
|
jaroslav@20
|
406 |
case bc_ifne: {
|
jaroslav@20
|
407 |
int indx = i + readIntArg(byteCodes, i);
|
jaroslav@20
|
408 |
out.append("if (stack.pop() != 0) { gt = " + indx);
|
jaroslav@20
|
409 |
out.append("; continue; }");
|
jaroslav@20
|
410 |
i += 2;
|
jaroslav@20
|
411 |
break;
|
jaroslav@20
|
412 |
}
|
jaroslav@20
|
413 |
case bc_iflt: {
|
jaroslav@20
|
414 |
int indx = i + readIntArg(byteCodes, i);
|
jaroslav@20
|
415 |
out.append("if (stack.pop() < 0) { gt = " + indx);
|
jaroslav@20
|
416 |
out.append("; continue; }");
|
jaroslav@20
|
417 |
i += 2;
|
jaroslav@20
|
418 |
break;
|
jaroslav@20
|
419 |
}
|
jaroslav@20
|
420 |
case bc_ifle: {
|
jaroslav@20
|
421 |
int indx = i + readIntArg(byteCodes, i);
|
jaroslav@20
|
422 |
out.append("if (stack.pop() <= 0) { gt = " + indx);
|
jaroslav@20
|
423 |
out.append("; continue; }");
|
jaroslav@20
|
424 |
i += 2;
|
jaroslav@20
|
425 |
break;
|
jaroslav@20
|
426 |
}
|
jaroslav@20
|
427 |
case bc_ifgt: {
|
jaroslav@20
|
428 |
int indx = i + readIntArg(byteCodes, i);
|
jaroslav@20
|
429 |
out.append("if (stack.pop() > 0) { gt = " + indx);
|
jaroslav@20
|
430 |
out.append("; continue; }");
|
jaroslav@20
|
431 |
i += 2;
|
jaroslav@20
|
432 |
break;
|
jaroslav@20
|
433 |
}
|
jaroslav@20
|
434 |
case bc_ifge: {
|
jaroslav@20
|
435 |
int indx = i + readIntArg(byteCodes, i);
|
jaroslav@20
|
436 |
out.append("if (stack.pop() >= 0) { gt = " + indx);
|
jaroslav@20
|
437 |
out.append("; continue; }");
|
jaroslav@20
|
438 |
i += 2;
|
jaroslav@20
|
439 |
break;
|
jaroslav@20
|
440 |
}
|
jaroslav@16
|
441 |
case bc_ifnonnull: {
|
jaroslav@16
|
442 |
int indx = i + readIntArg(byteCodes, i);
|
jaroslav@16
|
443 |
out.append("if (stack.pop()) { gt = " + indx);
|
jaroslav@16
|
444 |
out.append("; continue; }");
|
jaroslav@16
|
445 |
i += 2;
|
jaroslav@16
|
446 |
break;
|
jaroslav@16
|
447 |
}
|
jaroslav@16
|
448 |
case bc_ifnull: {
|
jaroslav@16
|
449 |
int indx = i + readIntArg(byteCodes, i);
|
jaroslav@16
|
450 |
out.append("if (!stack.pop()) { gt = " + indx);
|
jaroslav@16
|
451 |
out.append("; continue; }");
|
jaroslav@16
|
452 |
i += 2;
|
jaroslav@16
|
453 |
break;
|
jaroslav@16
|
454 |
}
|
jaroslav@4
|
455 |
case bc_if_icmpne:
|
jaroslav@4
|
456 |
i = generateIf(byteCodes, i, "!=");
|
jaroslav@4
|
457 |
break;
|
jaroslav@4
|
458 |
case bc_if_icmplt:
|
jaroslav@4
|
459 |
i = generateIf(byteCodes, i, ">");
|
jaroslav@4
|
460 |
break;
|
jaroslav@4
|
461 |
case bc_if_icmple:
|
jaroslav@4
|
462 |
i = generateIf(byteCodes, i, ">=");
|
jaroslav@4
|
463 |
break;
|
jaroslav@4
|
464 |
case bc_if_icmpgt:
|
jaroslav@4
|
465 |
i = generateIf(byteCodes, i, "<");
|
jaroslav@4
|
466 |
break;
|
jaroslav@4
|
467 |
case bc_if_icmpge:
|
jaroslav@4
|
468 |
i = generateIf(byteCodes, i, "<=");
|
jaroslav@4
|
469 |
break;
|
jaroslav@5
|
470 |
case bc_goto: {
|
jaroslav@5
|
471 |
int indx = i + readIntArg(byteCodes, i);
|
jaroslav@5
|
472 |
out.append("gt = " + indx).append("; continue;");
|
jaroslav@5
|
473 |
i += 2;
|
jaroslav@5
|
474 |
break;
|
jaroslav@5
|
475 |
}
|
jaroslav@15
|
476 |
case bc_invokeinterface:
|
jaroslav@12
|
477 |
case bc_invokevirtual:
|
jaroslav@12
|
478 |
i = invokeVirtualMethod(byteCodes, i);
|
jaroslav@12
|
479 |
break;
|
jaroslav@10
|
480 |
case bc_invokespecial:
|
jaroslav@10
|
481 |
i = invokeStaticMethod(byteCodes, i, false);
|
jaroslav@4
|
482 |
break;
|
jaroslav@10
|
483 |
case bc_invokestatic:
|
jaroslav@10
|
484 |
i = invokeStaticMethod(byteCodes, i, true);
|
jaroslav@10
|
485 |
break;
|
jaroslav@8
|
486 |
case bc_new: {
|
jaroslav@8
|
487 |
int indx = readIntArg(byteCodes, i);
|
jaroslav@8
|
488 |
CPClassInfo ci = jc.getConstantPool().getClass(indx);
|
jaroslav@8
|
489 |
out.append("stack.push(");
|
jaroslav@18
|
490 |
out.append("new ").append(ci.getClassName().getInternalName().replace('/','_'));
|
jaroslav@10
|
491 |
out.append(");");
|
jaroslav@18
|
492 |
addReference(ci.getClassName().getInternalName());
|
jaroslav@8
|
493 |
i += 2;
|
jaroslav@8
|
494 |
break;
|
jaroslav@8
|
495 |
}
|
jaroslav@21
|
496 |
case bc_newarray: {
|
jaroslav@21
|
497 |
int type = byteCodes[i++];
|
jaroslav@21
|
498 |
out.append("stack.push(new Array(stack.pop()));");
|
jaroslav@21
|
499 |
break;
|
jaroslav@21
|
500 |
}
|
jaroslav@21
|
501 |
case bc_anewarray: {
|
jaroslav@21
|
502 |
i += 2; // skip type of array
|
jaroslav@21
|
503 |
out.append("stack.push(new Array(stack.pop()));");
|
jaroslav@21
|
504 |
break;
|
jaroslav@21
|
505 |
}
|
jaroslav@21
|
506 |
case bc_arraylength:
|
jaroslav@21
|
507 |
out.append("stack.push(stack.pop().length);");
|
jaroslav@21
|
508 |
break;
|
jaroslav@21
|
509 |
case bc_iastore:
|
jaroslav@21
|
510 |
case bc_lastore:
|
jaroslav@21
|
511 |
case bc_fastore:
|
jaroslav@21
|
512 |
case bc_dastore:
|
jaroslav@21
|
513 |
case bc_aastore:
|
jaroslav@21
|
514 |
case bc_bastore:
|
jaroslav@21
|
515 |
case bc_castore:
|
jaroslav@21
|
516 |
case bc_sastore: {
|
jaroslav@21
|
517 |
out.append("{ var value = stack.pop(); var indx = stack.pop(); stack.pop()[indx] = value; }");
|
jaroslav@21
|
518 |
break;
|
jaroslav@21
|
519 |
}
|
jaroslav@21
|
520 |
case bc_iaload:
|
jaroslav@21
|
521 |
case bc_laload:
|
jaroslav@21
|
522 |
case bc_faload:
|
jaroslav@21
|
523 |
case bc_daload:
|
jaroslav@21
|
524 |
case bc_aaload:
|
jaroslav@21
|
525 |
case bc_baload:
|
jaroslav@21
|
526 |
case bc_caload:
|
jaroslav@21
|
527 |
case bc_saload: {
|
jaroslav@21
|
528 |
out.append("{ var indx = stack.pop(); stack.push(stack.pop()[indx]); }");
|
jaroslav@21
|
529 |
break;
|
jaroslav@21
|
530 |
}
|
jaroslav@8
|
531 |
case bc_dup:
|
jaroslav@8
|
532 |
out.append("stack.push(stack[stack.length - 1]);");
|
jaroslav@8
|
533 |
break;
|
jaroslav@8
|
534 |
case bc_bipush:
|
jaroslav@8
|
535 |
out.append("stack.push(" + byteCodes[++i] + ");");
|
jaroslav@8
|
536 |
break;
|
jaroslav@8
|
537 |
case bc_getfield: {
|
jaroslav@8
|
538 |
int indx = readIntArg(byteCodes, i);
|
jaroslav@8
|
539 |
CPFieldInfo fi = (CPFieldInfo) jc.getConstantPool().get(indx);
|
jaroslav@21
|
540 |
out.append("stack.push(stack.pop().").append(fi.getFieldName()).append(");");
|
jaroslav@8
|
541 |
i += 2;
|
jaroslav@8
|
542 |
break;
|
jaroslav@8
|
543 |
}
|
jaroslav@9
|
544 |
case bc_getstatic: {
|
jaroslav@9
|
545 |
int indx = readIntArg(byteCodes, i);
|
jaroslav@9
|
546 |
CPFieldInfo fi = (CPFieldInfo) jc.getConstantPool().get(indx);
|
jaroslav@18
|
547 |
final String in = fi.getClassName().getInternalName();
|
jaroslav@18
|
548 |
out.append("stack.push(").append(in.replace('/', '_'));
|
jaroslav@9
|
549 |
out.append('_').append(fi.getFieldName()).append(");");
|
jaroslav@9
|
550 |
i += 2;
|
jaroslav@18
|
551 |
addReference(in);
|
jaroslav@9
|
552 |
break;
|
jaroslav@9
|
553 |
}
|
jaroslav@9
|
554 |
case bc_putstatic: {
|
jaroslav@9
|
555 |
int indx = readIntArg(byteCodes, i);
|
jaroslav@9
|
556 |
CPFieldInfo fi = (CPFieldInfo) jc.getConstantPool().get(indx);
|
jaroslav@18
|
557 |
final String in = fi.getClassName().getInternalName();
|
jaroslav@18
|
558 |
out.append(in.replace('/', '_'));
|
jaroslav@9
|
559 |
out.append('_').append(fi.getFieldName()).append(" = stack.pop();");
|
jaroslav@9
|
560 |
i += 2;
|
jaroslav@18
|
561 |
addReference(in);
|
jaroslav@9
|
562 |
break;
|
jaroslav@9
|
563 |
}
|
jaroslav@10
|
564 |
case bc_putfield: {
|
jaroslav@10
|
565 |
int indx = readIntArg(byteCodes, i);
|
jaroslav@10
|
566 |
CPFieldInfo fi = (CPFieldInfo) jc.getConstantPool().get(indx);
|
jaroslav@10
|
567 |
out.append("{ var v = stack.pop(); stack.pop().")
|
jaroslav@10
|
568 |
.append(fi.getFieldName()).append(" = v; }");
|
jaroslav@10
|
569 |
i += 2;
|
jaroslav@10
|
570 |
break;
|
jaroslav@10
|
571 |
}
|
jaroslav@17
|
572 |
case bc_instanceof: {
|
jaroslav@17
|
573 |
int indx = readIntArg(byteCodes, i);
|
jaroslav@17
|
574 |
CPClassInfo ci = jc.getConstantPool().getClass(indx);
|
jaroslav@17
|
575 |
out.append("stack.push(stack.pop().$instOf_")
|
jaroslav@18
|
576 |
.append(ci.getClassName().getInternalName().replace('/', '_'))
|
jaroslav@17
|
577 |
.append(" ? 1 : 0);");
|
jaroslav@17
|
578 |
i += 2;
|
jaroslav@17
|
579 |
}
|
jaroslav@8
|
580 |
|
jaroslav@0
|
581 |
}
|
jaroslav@3
|
582 |
out.append(" /*");
|
jaroslav@0
|
583 |
for (int j = prev; j <= i; j++) {
|
jaroslav@0
|
584 |
out.append(" ");
|
jaroslav@0
|
585 |
final int cc = (byteCodes[j] + 256) % 256;
|
jaroslav@0
|
586 |
out.append(Integer.toString(cc));
|
jaroslav@0
|
587 |
}
|
jaroslav@0
|
588 |
out.append("*/\n");
|
jaroslav@0
|
589 |
}
|
jaroslav@10
|
590 |
out.append(" }\n");
|
jaroslav@4
|
591 |
}
|
jaroslav@4
|
592 |
|
jaroslav@4
|
593 |
private int generateIf(byte[] byteCodes, int i, final String test) throws IOException {
|
jaroslav@4
|
594 |
int indx = i + readIntArg(byteCodes, i);
|
jaroslav@4
|
595 |
out.append("if (stack.pop() ").append(test).append(" stack.pop()) { gt = " + indx);
|
jaroslav@4
|
596 |
out.append("; continue; }");
|
jaroslav@4
|
597 |
return i + 2;
|
jaroslav@4
|
598 |
}
|
jaroslav@4
|
599 |
|
jaroslav@4
|
600 |
private int readIntArg(byte[] byteCodes, int offsetInstruction) {
|
jaroslav@5
|
601 |
final int indxHi = byteCodes[offsetInstruction + 1] << 8;
|
jaroslav@5
|
602 |
final int indxLo = byteCodes[offsetInstruction + 2];
|
jaroslav@5
|
603 |
return (indxHi & 0xffffff00) | (indxLo & 0xff);
|
jaroslav@4
|
604 |
}
|
jaroslav@4
|
605 |
|
jaroslav@4
|
606 |
private static int countArgs(String descriptor, boolean[] hasReturnType, StringBuilder sig) {
|
jaroslav@4
|
607 |
int cnt = 0;
|
jaroslav@4
|
608 |
int i = 0;
|
jaroslav@4
|
609 |
Boolean count = null;
|
jaroslav@10
|
610 |
int firstPos = sig.length();
|
jaroslav@4
|
611 |
while (i < descriptor.length()) {
|
jaroslav@4
|
612 |
char ch = descriptor.charAt(i++);
|
jaroslav@4
|
613 |
switch (ch) {
|
jaroslav@4
|
614 |
case '(':
|
jaroslav@4
|
615 |
count = true;
|
jaroslav@4
|
616 |
continue;
|
jaroslav@4
|
617 |
case ')':
|
jaroslav@4
|
618 |
count = false;
|
jaroslav@4
|
619 |
continue;
|
jaroslav@4
|
620 |
case 'B':
|
jaroslav@4
|
621 |
case 'C':
|
jaroslav@4
|
622 |
case 'D':
|
jaroslav@4
|
623 |
case 'F':
|
jaroslav@4
|
624 |
case 'I':
|
jaroslav@4
|
625 |
case 'J':
|
jaroslav@4
|
626 |
case 'S':
|
jaroslav@4
|
627 |
case 'Z':
|
jaroslav@4
|
628 |
if (count) {
|
jaroslav@4
|
629 |
cnt++;
|
jaroslav@4
|
630 |
sig.append(ch);
|
jaroslav@4
|
631 |
} else {
|
jaroslav@4
|
632 |
hasReturnType[0] = true;
|
jaroslav@10
|
633 |
sig.insert(firstPos, ch);
|
jaroslav@4
|
634 |
}
|
jaroslav@4
|
635 |
continue;
|
jaroslav@4
|
636 |
case 'V':
|
jaroslav@4
|
637 |
assert !count;
|
jaroslav@4
|
638 |
hasReturnType[0] = false;
|
jaroslav@10
|
639 |
sig.insert(firstPos, 'V');
|
jaroslav@4
|
640 |
continue;
|
jaroslav@4
|
641 |
case 'L':
|
jaroslav@16
|
642 |
int next = descriptor.indexOf(';', i);
|
jaroslav@4
|
643 |
if (count) {
|
jaroslav@4
|
644 |
cnt++;
|
jaroslav@16
|
645 |
sig.append(ch);
|
jaroslav@16
|
646 |
sig.append(descriptor.substring(i, next).replace('/', '_'));
|
jaroslav@4
|
647 |
} else {
|
jaroslav@16
|
648 |
sig.insert(firstPos, descriptor.substring(i, next).replace('/', '_'));
|
jaroslav@16
|
649 |
sig.insert(firstPos, ch);
|
jaroslav@4
|
650 |
hasReturnType[0] = true;
|
jaroslav@4
|
651 |
}
|
jaroslav@16
|
652 |
i = next + 1;
|
jaroslav@4
|
653 |
continue;
|
jaroslav@4
|
654 |
case '[':
|
jaroslav@4
|
655 |
//arrays++;
|
jaroslav@4
|
656 |
continue;
|
jaroslav@4
|
657 |
default:
|
jaroslav@4
|
658 |
break; // invalid character
|
jaroslav@4
|
659 |
}
|
jaroslav@4
|
660 |
}
|
jaroslav@4
|
661 |
return cnt;
|
jaroslav@0
|
662 |
}
|
jaroslav@9
|
663 |
|
jaroslav@9
|
664 |
private void generateStaticField(Variable v) throws IOException {
|
jaroslav@9
|
665 |
out.append("\nvar ")
|
jaroslav@18
|
666 |
.append(jc.getName().getInternalName().replace('/', '_'))
|
jaroslav@9
|
667 |
.append('_').append(v.getName()).append(" = 0;");
|
jaroslav@9
|
668 |
}
|
jaroslav@10
|
669 |
|
jaroslav@10
|
670 |
private String findMethodName(Method m) {
|
jaroslav@19
|
671 |
StringBuilder tmp = new StringBuilder();
|
jaroslav@10
|
672 |
if ("<init>".equals(m.getName())) { // NOI18N
|
jaroslav@19
|
673 |
tmp.append("consV"); // NOI18N
|
jaroslav@19
|
674 |
} else if ("<clinit>".equals(m.getName())) { // NOI18N
|
jaroslav@19
|
675 |
tmp.append("classV"); // NOI18N
|
jaroslav@10
|
676 |
} else {
|
jaroslav@19
|
677 |
tmp.append(m.getName());
|
jaroslav@19
|
678 |
outType(m.getReturnType(), tmp);
|
jaroslav@10
|
679 |
}
|
jaroslav@10
|
680 |
List<Parameter> args = m.getParameters();
|
jaroslav@10
|
681 |
for (Parameter t : args) {
|
jaroslav@19
|
682 |
outType(t.getDescriptor(), tmp);
|
jaroslav@10
|
683 |
}
|
jaroslav@19
|
684 |
return tmp.toString();
|
jaroslav@10
|
685 |
}
|
jaroslav@10
|
686 |
|
jaroslav@10
|
687 |
private String findMethodName(CPMethodInfo mi, int[] cnt, boolean[] hasReturn) {
|
jaroslav@10
|
688 |
StringBuilder name = new StringBuilder();
|
jaroslav@10
|
689 |
if ("<init>".equals(mi.getName())) { // NOI18N
|
jaroslav@10
|
690 |
name.append("cons"); // NOI18N
|
jaroslav@10
|
691 |
} else {
|
jaroslav@10
|
692 |
name.append(mi.getName());
|
jaroslav@10
|
693 |
}
|
jaroslav@10
|
694 |
cnt[0] = countArgs(mi.getDescriptor(), hasReturn, name);
|
jaroslav@10
|
695 |
return name.toString();
|
jaroslav@10
|
696 |
}
|
jaroslav@10
|
697 |
|
jaroslav@10
|
698 |
private int invokeStaticMethod(byte[] byteCodes, int i, boolean isStatic)
|
jaroslav@10
|
699 |
throws IOException {
|
jaroslav@10
|
700 |
int methodIndex = readIntArg(byteCodes, i);
|
jaroslav@10
|
701 |
CPMethodInfo mi = (CPMethodInfo) jc.getConstantPool().get(methodIndex);
|
jaroslav@10
|
702 |
boolean[] hasReturn = { false };
|
jaroslav@10
|
703 |
int[] cnt = { 0 };
|
jaroslav@10
|
704 |
String mn = findMethodName(mi, cnt, hasReturn);
|
jaroslav@11
|
705 |
out.append("{ ");
|
jaroslav@11
|
706 |
for (int j = cnt[0] - 1; j >= 0; j--) {
|
jaroslav@11
|
707 |
out.append("var v" + j).append(" = stack.pop(); ");
|
jaroslav@11
|
708 |
}
|
jaroslav@11
|
709 |
|
jaroslav@10
|
710 |
if (hasReturn[0]) {
|
jaroslav@10
|
711 |
out.append("stack.push(");
|
jaroslav@10
|
712 |
}
|
jaroslav@18
|
713 |
final String in = mi.getClassName().getInternalName();
|
jaroslav@18
|
714 |
out.append(in.replace('/', '_'));
|
jaroslav@10
|
715 |
out.append('_');
|
jaroslav@10
|
716 |
out.append(mn);
|
jaroslav@10
|
717 |
out.append('(');
|
jaroslav@10
|
718 |
String sep = "";
|
jaroslav@10
|
719 |
if (!isStatic) {
|
jaroslav@10
|
720 |
out.append("stack.pop()");
|
jaroslav@10
|
721 |
sep = ", ";
|
jaroslav@10
|
722 |
}
|
jaroslav@10
|
723 |
for (int j = 0; j < cnt[0]; j++) {
|
jaroslav@10
|
724 |
out.append(sep);
|
jaroslav@11
|
725 |
out.append("v" + j);
|
jaroslav@10
|
726 |
sep = ", ";
|
jaroslav@10
|
727 |
}
|
jaroslav@10
|
728 |
out.append(")");
|
jaroslav@10
|
729 |
if (hasReturn[0]) {
|
jaroslav@10
|
730 |
out.append(")");
|
jaroslav@10
|
731 |
}
|
jaroslav@11
|
732 |
out.append("; }");
|
jaroslav@10
|
733 |
i += 2;
|
jaroslav@18
|
734 |
addReference(in);
|
jaroslav@10
|
735 |
return i;
|
jaroslav@10
|
736 |
}
|
jaroslav@12
|
737 |
private int invokeVirtualMethod(byte[] byteCodes, int i)
|
jaroslav@12
|
738 |
throws IOException {
|
jaroslav@12
|
739 |
int methodIndex = readIntArg(byteCodes, i);
|
jaroslav@12
|
740 |
CPMethodInfo mi = (CPMethodInfo) jc.getConstantPool().get(methodIndex);
|
jaroslav@12
|
741 |
boolean[] hasReturn = { false };
|
jaroslav@12
|
742 |
int[] cnt = { 0 };
|
jaroslav@12
|
743 |
String mn = findMethodName(mi, cnt, hasReturn);
|
jaroslav@12
|
744 |
out.append("{ ");
|
jaroslav@12
|
745 |
for (int j = cnt[0] - 1; j >= 0; j--) {
|
jaroslav@12
|
746 |
out.append("var v" + j).append(" = stack.pop(); ");
|
jaroslav@12
|
747 |
}
|
jaroslav@12
|
748 |
out.append("var self = stack.pop(); ");
|
jaroslav@12
|
749 |
if (hasReturn[0]) {
|
jaroslav@12
|
750 |
out.append("stack.push(");
|
jaroslav@12
|
751 |
}
|
jaroslav@12
|
752 |
out.append("self.");
|
jaroslav@12
|
753 |
out.append(mn);
|
jaroslav@12
|
754 |
out.append('(');
|
jaroslav@12
|
755 |
out.append("self");
|
jaroslav@12
|
756 |
for (int j = 0; j < cnt[0]; j++) {
|
jaroslav@12
|
757 |
out.append(", ");
|
jaroslav@12
|
758 |
out.append("v" + j);
|
jaroslav@12
|
759 |
}
|
jaroslav@12
|
760 |
out.append(")");
|
jaroslav@12
|
761 |
if (hasReturn[0]) {
|
jaroslav@12
|
762 |
out.append(")");
|
jaroslav@12
|
763 |
}
|
jaroslav@12
|
764 |
out.append("; }");
|
jaroslav@12
|
765 |
i += 2;
|
jaroslav@12
|
766 |
return i;
|
jaroslav@12
|
767 |
}
|
jaroslav@18
|
768 |
|
jaroslav@18
|
769 |
private void addReference(String cn) {
|
jaroslav@18
|
770 |
if (references != null) {
|
jaroslav@18
|
771 |
references.add(cn);
|
jaroslav@18
|
772 |
}
|
jaroslav@18
|
773 |
}
|
jaroslav@16
|
774 |
|
jaroslav@16
|
775 |
private void outType(final String d, StringBuilder out) {
|
jaroslav@16
|
776 |
if (d.charAt(0) == 'L') {
|
jaroslav@16
|
777 |
assert d.charAt(d.length() - 1) == ';';
|
jaroslav@16
|
778 |
out.append(d.replace('/', '_').substring(0, d.length() - 1));
|
jaroslav@16
|
779 |
} else {
|
jaroslav@16
|
780 |
out.append(d);
|
jaroslav@16
|
781 |
}
|
jaroslav@16
|
782 |
}
|
jaroslav@21
|
783 |
|
jaroslav@21
|
784 |
private String encodeConstant(CPEntry entry) {
|
jaroslav@21
|
785 |
final String v;
|
jaroslav@21
|
786 |
if (entry instanceof CPStringInfo) {
|
jaroslav@21
|
787 |
v = "\"" + entry.getValue().toString().replace("\"", "\\\"") + "\"";
|
jaroslav@21
|
788 |
} else {
|
jaroslav@21
|
789 |
v = entry.getValue().toString();
|
jaroslav@21
|
790 |
}
|
jaroslav@21
|
791 |
return v;
|
jaroslav@21
|
792 |
}
|
jaroslav@0
|
793 |
}
|