jaroslav@106
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/**
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jaroslav@106
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* Back 2 Browser Bytecode Translator
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jaroslav@106
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* Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
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jaroslav@106
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*
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jaroslav@106
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* This program is free software: you can redistribute it and/or modify
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jaroslav@106
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* it under the terms of the GNU General Public License as published by
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jaroslav@106
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* the Free Software Foundation, version 2 of the License.
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jaroslav@106
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*
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jaroslav@106
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* This program is distributed in the hope that it will be useful,
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jaroslav@106
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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jaroslav@106
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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jaroslav@106
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* GNU General Public License for more details.
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jaroslav@106
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*
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jaroslav@106
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* You should have received a copy of the GNU General Public License
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jaroslav@106
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* along with this program. Look for COPYING file in the top folder.
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jaroslav@106
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* If not, see http://opensource.org/licenses/GPL-2.0.
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jaroslav@106
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*/
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jaroslav@29
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package org.apidesign.vm4brwsr;
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jaroslav@29
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jaroslav@29
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import java.io.IOException;
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jaroslav@29
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import java.io.InputStream;
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jaroslav@29
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jaroslav@29
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/** Generator of JavaScript from bytecode of classes on classpath of the VM.
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jaroslav@29
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*
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jaroslav@29
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* @author Jaroslav Tulach <jtulach@netbeans.org>
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jaroslav@29
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*/
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jaroslav@298
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class VM extends ByteCodeToJavaScript {
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jaroslav@298
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public VM(Appendable out) {
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jtulach@162
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super(out);
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jtulach@162
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}
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jaroslav@29
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jaroslav@277
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static {
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jaroslav@277
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// uses VMLazy to load dynamic classes
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jaroslav@277
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VMLazy.init();
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jaroslav@277
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}
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jaroslav@399
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jaroslav@399
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@Override
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jaroslav@399
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boolean debug(String msg) throws IOException {
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jaroslav@399
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return false;
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jaroslav@399
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}
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jaroslav@277
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jaroslav@298
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static void compile(Bck2Brwsr.Resources l, Appendable out, StringArray names) throws IOException {
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jaroslav@298
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new VM(out).doCompile(l, names);
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jaroslav@29
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}
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jaroslav@298
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protected void doCompile(Bck2Brwsr.Resources l, StringArray names) throws IOException {
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jaroslav@274
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out.append("(function VM(global) {");
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jaroslav@274
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out.append("\n var vm = {};");
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jtulach@162
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StringArray processed = new StringArray();
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jtulach@162
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StringArray initCode = new StringArray();
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jtulach@162
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for (String baseClass : names.toArray()) {
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jaroslav@272
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references.add(baseClass);
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jaroslav@97
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for (;;) {
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jaroslav@97
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String name = null;
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jaroslav@272
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for (String n : references.toArray()) {
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jtulach@162
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if (processed.contains(n)) {
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jaroslav@97
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continue;
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jaroslav@97
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}
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jaroslav@97
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name = n;
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jaroslav@97
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}
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jaroslav@97
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if (name == null) {
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jaroslav@97
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break;
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jaroslav@97
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}
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jaroslav@109
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InputStream is = loadClass(l, name);
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jaroslav@97
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if (is == null) {
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jaroslav@97
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throw new IOException("Can't find class " + name);
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jaroslav@97
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}
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jaroslav@97
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try {
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jaroslav@272
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String ic = compile(is);
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jtulach@162
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processed.add(name);
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jtulach@162
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initCode.add(ic == null ? "" : ic);
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jaroslav@97
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} catch (RuntimeException ex) {
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jaroslav@97
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if (out instanceof CharSequence) {
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jaroslav@97
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CharSequence seq = (CharSequence)out;
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jaroslav@97
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int lastBlock = seq.length();
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jaroslav@151
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while (lastBlock-- > 0) {
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jaroslav@97
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if (seq.charAt(lastBlock) == '{') {
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jaroslav@97
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break;
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jaroslav@97
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}
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jaroslav@29
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}
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jaroslav@97
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throw new IOException("Error while compiling " + name + "\n"
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jaroslav@97
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+ seq.subSequence(lastBlock + 1, seq.length()), ex
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jaroslav@97
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);
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jaroslav@97
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} else {
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jaroslav@97
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throw new IOException("Error while compiling " + name + "\n"
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jaroslav@97
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+ out, ex
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jaroslav@97
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);
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jaroslav@29
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}
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jaroslav@97
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}
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jaroslav@29
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}
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jaroslav@97
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jaroslav@272
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for (String resource : scripts.toArray()) {
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jaroslav@250
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while (resource.startsWith("/")) {
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jaroslav@250
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resource = resource.substring(1);
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jaroslav@250
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}
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jaroslav@298
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InputStream emul = l.get(resource);
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jaroslav@250
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if (emul == null) {
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jaroslav@250
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throw new IOException("Can't find " + resource);
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jaroslav@250
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}
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jaroslav@250
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readResource(emul, out);
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jaroslav@250
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}
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jaroslav@272
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scripts = new StringArray();
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jaroslav@250
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jaroslav@272
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StringArray toInit = StringArray.asList(references.toArray());
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jtulach@162
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toInit.reverse();
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jtulach@129
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jtulach@162
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for (String ic : toInit.toArray()) {
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jtulach@162
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int indx = processed.indexOf(ic);
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jtulach@162
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if (indx >= 0) {
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jtulach@162
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out.append(initCode.toArray()[indx]).append("\n");
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jtulach@162
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initCode.toArray()[indx] = "";
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jaroslav@91
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}
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jaroslav@91
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}
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jaroslav@29
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}
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jaroslav@274
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out.append(
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jaroslav@277
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" global.bck2brwsr = function() {\n"
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jaroslav@277
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+ " var args = arguments;\n"
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jaroslav@277
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+ " var loader = {};\n"
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jaroslav@277
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+ " loader.vm = vm;\n"
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jaroslav@277
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+ " loader.loadClass = function(name) {\n"
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jaroslav@442
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+ " var attr = name.replace__Ljava_lang_String_2CC('.','_');\n"
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jaroslav@277
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+ " var fn = vm[attr];\n"
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jaroslav@277
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+ " if (fn) return fn(false);\n"
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jaroslav@300
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+ " if (!args[0]) throw 'bck2brwsr initialized without loader function, cannot load ' + name;\n"
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jaroslav@277
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+ " return vm.org_apidesign_vm4brwsr_VMLazy(false).\n"
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lubomir@407
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+ " load__Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_String_2_3Ljava_lang_Object_2(loader, name, args);\n"
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jaroslav@277
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+ " }\n"
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jaroslav@424
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+ " if (args[0]) {\n"
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jaroslav@424
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+ " vm.loadClass = loader.loadClass;\n"
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jaroslav@424
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+ " vm.loadBytes = function(name) {\n"
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jaroslav@424
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+ " if (!args[0]) throw 'bck2brwsr initialized without loader function, cannot load ' + name;\n"
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jaroslav@424
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+ " return args[0](name);\n"
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jaroslav@424
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+ " }\n"
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jaroslav@424
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+ " }\n"
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jaroslav@277
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+ " return loader;\n"
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jaroslav@277
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+ " };\n");
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jaroslav@274
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out.append("}(this));");
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jaroslav@29
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}
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jaroslav@90
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private static void readResource(InputStream emul, Appendable out) throws IOException {
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jaroslav@90
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try {
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jaroslav@90
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int state = 0;
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jaroslav@90
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for (;;) {
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jaroslav@90
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int ch = emul.read();
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jaroslav@90
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if (ch == -1) {
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jaroslav@90
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break;
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jaroslav@90
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}
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jaroslav@90
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if (ch < 0 || ch > 255) {
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jaroslav@90
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throw new IOException("Invalid char in emulation " + ch);
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jaroslav@90
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}
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jaroslav@90
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switch (state) {
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jaroslav@90
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case 0:
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jaroslav@90
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if (ch == '/') {
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jaroslav@90
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state = 1;
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jaroslav@90
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} else {
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jaroslav@90
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out.append((char)ch);
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jaroslav@90
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}
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jaroslav@90
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break;
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jaroslav@90
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case 1:
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jaroslav@90
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if (ch == '*') {
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jaroslav@90
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state = 2;
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jaroslav@90
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} else {
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jaroslav@90
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out.append('/').append((char)ch);
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jaroslav@90
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state = 0;
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jaroslav@90
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}
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jaroslav@90
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break;
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jaroslav@90
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case 2:
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jaroslav@90
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if (ch == '*') {
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jaroslav@90
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state = 3;
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jaroslav@90
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}
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jaroslav@90
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break;
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jaroslav@90
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case 3:
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jaroslav@90
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if (ch == '/') {
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jaroslav@90
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state = 0;
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jaroslav@90
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} else {
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jaroslav@90
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state = 2;
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jaroslav@90
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}
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jaroslav@90
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break;
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jaroslav@90
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}
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jaroslav@90
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}
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jaroslav@90
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} finally {
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jaroslav@90
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emul.close();
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jaroslav@90
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}
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jaroslav@90
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}
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jaroslav@93
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183 |
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jaroslav@298
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184 |
private static InputStream loadClass(Bck2Brwsr.Resources l, String name) throws IOException {
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jaroslav@298
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185 |
return l.get(name + ".class"); // NOI18N
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jaroslav@93
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}
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jaroslav@136
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187 |
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jaroslav@136
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188 |
static String toString(String name) throws IOException {
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jaroslav@136
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StringBuilder sb = new StringBuilder();
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jaroslav@298
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// compile(sb, name);
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jaroslav@136
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return sb.toString().toString();
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jaroslav@136
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}
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jtulach@162
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jtulach@162
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194 |
private StringArray scripts = new StringArray();
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jtulach@162
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195 |
private StringArray references = new StringArray();
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jtulach@162
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196 |
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jtulach@162
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197 |
@Override
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jtulach@162
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198 |
protected boolean requireReference(String cn) {
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jtulach@162
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199 |
if (references.contains(cn)) {
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jtulach@162
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200 |
return false;
|
jtulach@162
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201 |
}
|
jtulach@162
|
202 |
references.add(cn);
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jtulach@162
|
203 |
return true;
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jtulach@162
|
204 |
}
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jtulach@162
|
205 |
|
jtulach@162
|
206 |
@Override
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jtulach@162
|
207 |
protected void requireScript(String resourcePath) {
|
jtulach@162
|
208 |
scripts.add(resourcePath);
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jtulach@162
|
209 |
}
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jaroslav@274
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210 |
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jaroslav@274
|
211 |
@Override
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jaroslav@274
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212 |
String assignClass(String className) {
|
jaroslav@274
|
213 |
return "vm." + className + " = ";
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jaroslav@274
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214 |
}
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jaroslav@274
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215 |
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jaroslav@274
|
216 |
@Override
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jaroslav@274
|
217 |
String accessClass(String className) {
|
jaroslav@274
|
218 |
return "vm." + className;
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jaroslav@274
|
219 |
}
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jaroslav@29
|
220 |
}
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