2 * Back 2 Browser Bytecode Translator
3 * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, version 2 of the License.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. Look for COPYING file in the top folder.
16 * If not, see http://opensource.org/licenses/GPL-2.0.
18 package org.apidesign.vm4brwsr;
20 import java.io.IOException;
21 import java.io.InputStream;
22 import org.apidesign.javap.AnnotationParser;
23 import org.apidesign.javap.ClassData;
24 import org.apidesign.javap.FieldData;
25 import org.apidesign.javap.MethodData;
26 import org.apidesign.javap.StackMapIterator;
27 import static org.apidesign.javap.RuntimeConstants.*;
28 import org.apidesign.javap.TrapData;
29 import org.apidesign.javap.TrapDataIterator;
31 /** Translator of the code inside class files to JavaScript.
33 * @author Jaroslav Tulach <jtulach@netbeans.org>
35 abstract class ByteCodeToJavaScript {
39 protected ByteCodeToJavaScript(Appendable out) {
43 /* Collects additional required resources.
45 * @param internalClassName classes that were referenced and should be loaded in order the
46 * generated JavaScript code works properly. The names are in internal
47 * JVM form so String is <code>java/lang/String</code>.
49 protected abstract boolean requireReference(String internalClassName);
52 * @param resourcePath name of resources to read
54 protected abstract void requireScript(String resourcePath);
56 /** Allows subclasses to redefine what field a function representing a
57 * class gets assigned. By default it returns the suggested name followed
58 * by <code>" = "</code>;
60 * @param className suggested name of the class
62 /* protected */ String assignClass(String className) {
63 return className + " = ";
65 /* protected */ String accessClass(String classOperation) {
66 return classOperation;
69 /** Prints out a debug message.
71 * @param msg the message
72 * @return true if the message has been printed
75 boolean debug(String msg) throws IOException {
81 * Converts a given class file to a JavaScript version.
83 * @param classFile input stream with code of the .class file
84 * @return the initialization code for this class, if any. Otherwise <code>null</code>
86 * @throws IOException if something goes wrong during read or write or translating
89 public String compile(InputStream classFile) throws IOException {
90 this.jc = new ClassData(classFile);
91 if (jc.getMajor_version() < 50) {
92 throw new IOException("Can't compile " + jc.getClassName() + ". Class file version " + jc.getMajor_version() + "."
93 + jc.getMinor_version() + " - recompile with -target 1.6 (at least)."
96 byte[] arrData = jc.findAnnotationData(true);
97 String[] arr = findAnnotation(arrData, jc,
98 "org.apidesign.bck2brwsr.core.ExtraJavaScript",
99 "resource", "processByteCode"
102 requireScript(arr[0]);
103 if ("0".equals(arr[1])) {
107 String[] proto = findAnnotation(arrData, jc,
108 "org.apidesign.bck2brwsr.core.JavaScriptPrototype",
109 "container", "prototype"
111 StringArray toInitilize = new StringArray();
112 final String className = className(jc);
113 out.append("\n\n").append(assignClass(className));
114 out.append("function CLS() {");
115 out.append("\n if (!CLS.prototype.$instOf_").append(className).append(") {");
116 for (FieldData v : jc.getFields()) {
118 out.append("\n CLS.").append(v.getName()).append(initField(v));
122 String sc = jc.getSuperClassName(); // with _
123 out.append("\n var pp = ").
124 append(accessClass(sc.replace('/', '_'))).append("(true);");
125 out.append("\n var p = CLS.prototype = pp;");
126 out.append("\n var c = p;");
127 out.append("\n var sprcls = pp.constructor.$class;");
129 out.append("\n var p = CLS.prototype = ").append(proto[1]).append(";");
130 if (proto[0] == null) {
133 out.append("\n var c = ").append(proto[0]).append(";");
134 out.append("\n var sprcls = null;");
136 for (MethodData m : jc.getMethods()) {
137 byte[] onlyArr = m.findAnnotationData(true);
138 String[] only = findAnnotation(onlyArr, jc,
139 "org.apidesign.bck2brwsr.core.JavaScriptOnly",
143 if (only[0] != null && only[1] != null) {
144 out.append("\n p.").append(only[0]).append(" = ")
145 .append(only[1]).append(";");
153 mn = generateStaticMethod(prefix, m, toInitilize);
155 if (m.isConstructor()) {
157 mn = generateInstanceMethod(prefix, m);
160 mn = generateInstanceMethod(prefix, m);
163 byte[] runAnno = m.findAnnotationData(false);
164 if (runAnno != null) {
165 out.append(prefix).append(mn).append(".anno = {");
166 generateAnno(jc, out, runAnno);
169 out.append(prefix).append(mn).append(".access = " + m.getAccess()).append(";");
171 out.append("\n c.constructor = CLS;");
172 out.append("\n c.$instOf_").append(className).append(" = true;");
173 for (String superInterface : jc.getSuperInterfaces()) {
174 out.append("\n c.$instOf_").append(superInterface.replace('/', '_')).append(" = true;");
176 out.append("\n CLS.$class = ");
177 out.append(accessClass("java_lang_Class(true);"));
178 out.append("\n CLS.$class.jvmName = '").append(jc.getClassName()).append("';");
179 out.append("\n CLS.$class.superclass = sprcls;");
180 out.append("\n CLS.$class.access = ").append(jc.getAccessFlags()+";");
181 out.append("\n CLS.$class.cnstr = CLS;");
182 byte[] classAnno = jc.findAnnotationData(false);
183 if (classAnno != null) {
184 out.append("\n CLS.$class.anno = {");
185 generateAnno(jc, out, classAnno);
189 out.append("\n if (arguments.length === 0) {");
190 out.append("\n if (!(this instanceof CLS)) {");
191 out.append("\n return new CLS();");
193 for (FieldData v : jc.getFields()) {
194 byte[] onlyArr = v.findAnnotationData(true);
195 String[] only = findAnnotation(onlyArr, jc,
196 "org.apidesign.bck2brwsr.core.JavaScriptOnly",
200 if (only[0] != null && only[1] != null) {
201 out.append("\n p.").append(only[0]).append(" = ")
202 .append(only[1]).append(";");
207 out.append("\n this.fld_").
208 append(v.getName()).append(initField(v));
211 out.append("\n return this;");
213 out.append("\n return arguments[0] ? new CLS() : CLS.prototype;");
215 StringBuilder sb = new StringBuilder();
216 for (String init : toInitilize.toArray()) {
217 sb.append("\n").append(init).append("();");
219 return sb.toString();
221 private String generateStaticMethod(String prefix, MethodData m, StringArray toInitilize) throws IOException {
222 String jsb = javaScriptBody(prefix, m, true);
226 final String mn = findMethodName(m, new StringBuilder());
227 if (mn.equals("class__V")) {
228 toInitilize.add(accessClass(className(jc)) + "(false)." + mn);
230 generateMethod(prefix, mn, m);
234 private String generateInstanceMethod(String prefix, MethodData m) throws IOException {
235 String jsb = javaScriptBody(prefix, m, false);
239 final String mn = findMethodName(m, new StringBuilder());
240 generateMethod(prefix, mn, m);
244 private void generateMethod(String prefix, String name, MethodData m)
246 final StackMapIterator stackMapIterator = m.createStackMapIterator();
247 TrapDataIterator trap = m.getTrapDataIterator();
248 final LocalsMapper lmapper =
249 new LocalsMapper(stackMapIterator.getArguments());
251 out.append(prefix).append(name).append(" = function(");
252 lmapper.outputArguments(out);
253 out.append(") {").append("\n");
255 final byte[] byteCodes = m.getCode();
256 if (byteCodes == null) {
257 out.append(" throw 'no code found for ")
258 .append(m.getInternalSig()).append("';\n");
263 final StackMapper smapper = new StackMapper();
265 final int maxLocals = m.getMaxLocals();
267 // TODO: generate only used local variables
268 for (int j = 0; j <= VarType.LAST; ++j) {
269 out.append("\n var ").append(Variable.getLocalVariable(j, 0));
270 for (int i = 1; i < maxLocals; ++i) {
272 out.append(Variable.getLocalVariable(j, i));
278 // maxStack includes two stack positions for every pushed long / double
279 // so this might generate more stack variables than we need
280 final int maxStack = m.getMaxStack();
282 // TODO: generate only used stack variables
283 for (int j = 0; j <= VarType.LAST; ++j) {
284 out.append("\n var ").append(Variable.getStackVariable(j, 0));
285 for (int i = 1; i < maxStack; ++i) {
287 out.append(Variable.getStackVariable(j, i));
293 int lastStackFrame = -1;
294 TrapData[] previousTrap = null;
296 out.append("\n var gt = 0;\n for(;;) switch(gt) {\n");
297 for (int i = 0; i < byteCodes.length; i++) {
299 stackMapIterator.advanceTo(i);
300 boolean changeInCatch = trap.advanceTo(i);
301 if (changeInCatch || lastStackFrame != stackMapIterator.getFrameIndex()) {
302 if (previousTrap != null) {
303 generateCatch(previousTrap);
307 if (lastStackFrame != stackMapIterator.getFrameIndex()) {
308 lastStackFrame = stackMapIterator.getFrameIndex();
309 lmapper.syncWithFrameLocals(stackMapIterator.getFrameLocals());
310 smapper.syncWithFrameStack(stackMapIterator.getFrameStack());
311 out.append(" case " + i).append(": ");
312 changeInCatch = true;
314 debug(" /* " + i + " */ ");
316 if (changeInCatch && trap.useTry()) {
318 previousTrap = trap.current();
320 final int c = readByte(byteCodes, i);
323 emit(out, "@1 = @2;", smapper.pushA(), lmapper.getA(0));
326 emit(out, "@1 = @2;", smapper.pushI(), lmapper.getI(0));
329 emit(out, "@1 = @2;", smapper.pushL(), lmapper.getL(0));
332 emit(out, "@1 = @2;", smapper.pushF(), lmapper.getF(0));
335 emit(out, "@1 = @2;", smapper.pushD(), lmapper.getD(0));
338 emit(out, "@1 = @2;", smapper.pushA(), lmapper.getA(1));
341 emit(out, "@1 = @2;", smapper.pushI(), lmapper.getI(1));
344 emit(out, "@1 = @2;", smapper.pushL(), lmapper.getL(1));
347 emit(out, "@1 = @2;", smapper.pushF(), lmapper.getF(1));
350 emit(out, "@1 = @2;", smapper.pushD(), lmapper.getD(1));
353 emit(out, "@1 = @2;", smapper.pushA(), lmapper.getA(2));
356 emit(out, "@1 = @2;", smapper.pushI(), lmapper.getI(2));
359 emit(out, "@1 = @2;", smapper.pushL(), lmapper.getL(2));
362 emit(out, "@1 = @2;", smapper.pushF(), lmapper.getF(2));
365 emit(out, "@1 = @2;", smapper.pushD(), lmapper.getD(2));
368 emit(out, "@1 = @2;", smapper.pushA(), lmapper.getA(3));
371 emit(out, "@1 = @2;", smapper.pushI(), lmapper.getI(3));
374 emit(out, "@1 = @2;", smapper.pushL(), lmapper.getL(3));
377 emit(out, "@1 = @2;", smapper.pushF(), lmapper.getF(3));
380 emit(out, "@1 = @2;", smapper.pushD(), lmapper.getD(3));
383 final int indx = readByte(byteCodes, ++i);
384 emit(out, "@1 = @2;", smapper.pushI(), lmapper.getI(indx));
388 final int indx = readByte(byteCodes, ++i);
389 emit(out, "@1 = @2;", smapper.pushL(), lmapper.getL(indx));
393 final int indx = readByte(byteCodes, ++i);
394 emit(out, "@1 = @2;", smapper.pushF(), lmapper.getF(indx));
398 final int indx = readByte(byteCodes, ++i);
399 emit(out, "@1 = @2;", smapper.pushD(), lmapper.getD(indx));
403 final int indx = readByte(byteCodes, ++i);
404 emit(out, "@1 = @2;", smapper.pushA(), lmapper.getA(indx));
408 final int indx = readByte(byteCodes, ++i);
409 emit(out, "@1 = @2;", lmapper.setI(indx), smapper.popI());
413 final int indx = readByte(byteCodes, ++i);
414 emit(out, "@1 = @2;", lmapper.setL(indx), smapper.popL());
418 final int indx = readByte(byteCodes, ++i);
419 emit(out, "@1 = @2;", lmapper.setF(indx), smapper.popF());
423 final int indx = readByte(byteCodes, ++i);
424 emit(out, "@1 = @2;", lmapper.setD(indx), smapper.popD());
428 final int indx = readByte(byteCodes, ++i);
429 emit(out, "@1 = @2;", lmapper.setA(indx), smapper.popA());
433 emit(out, "@1 = @2;", lmapper.setA(0), smapper.popA());
436 emit(out, "@1 = @2;", lmapper.setI(0), smapper.popI());
439 emit(out, "@1 = @2;", lmapper.setL(0), smapper.popL());
442 emit(out, "@1 = @2;", lmapper.setF(0), smapper.popF());
445 emit(out, "@1 = @2;", lmapper.setD(0), smapper.popD());
448 emit(out, "@1 = @2;", lmapper.setA(1), smapper.popA());
451 emit(out, "@1 = @2;", lmapper.setI(1), smapper.popI());
454 emit(out, "@1 = @2;", lmapper.setL(1), smapper.popL());
457 emit(out, "@1 = @2;", lmapper.setF(1), smapper.popF());
460 emit(out, "@1 = @2;", lmapper.setD(1), smapper.popD());
463 emit(out, "@1 = @2;", lmapper.setA(2), smapper.popA());
466 emit(out, "@1 = @2;", lmapper.setI(2), smapper.popI());
469 emit(out, "@1 = @2;", lmapper.setL(2), smapper.popL());
472 emit(out, "@1 = @2;", lmapper.setF(2), smapper.popF());
475 emit(out, "@1 = @2;", lmapper.setD(2), smapper.popD());
478 emit(out, "@1 = @2;", lmapper.setA(3), smapper.popA());
481 emit(out, "@1 = @2;", lmapper.setI(3), smapper.popI());
484 emit(out, "@1 = @2;", lmapper.setL(3), smapper.popL());
487 emit(out, "@1 = @2;", lmapper.setF(3), smapper.popF());
490 emit(out, "@1 = @2;", lmapper.setD(3), smapper.popD());
493 emit(out, "@1 += @2;", smapper.getI(1), smapper.popI());
496 emit(out, "@1 += @2;", smapper.getL(1), smapper.popL());
499 emit(out, "@1 += @2;", smapper.getF(1), smapper.popF());
502 emit(out, "@1 += @2;", smapper.getD(1), smapper.popD());
505 emit(out, "@1 -= @2;", smapper.getI(1), smapper.popI());
508 emit(out, "@1 -= @2;", smapper.getL(1), smapper.popL());
511 emit(out, "@1 -= @2;", smapper.getF(1), smapper.popF());
514 emit(out, "@1 -= @2;", smapper.getD(1), smapper.popD());
517 emit(out, "@1 *= @2;", smapper.getI(1), smapper.popI());
520 emit(out, "@1 *= @2;", smapper.getL(1), smapper.popL());
523 emit(out, "@1 *= @2;", smapper.getF(1), smapper.popF());
526 emit(out, "@1 *= @2;", smapper.getD(1), smapper.popD());
529 emit(out, "@1 = Math.floor(@1 / @2);",
530 smapper.getI(1), smapper.popI());
533 emit(out, "@1 = Math.floor(@1 / @2);",
534 smapper.getL(1), smapper.popL());
537 emit(out, "@1 /= @2;", smapper.getF(1), smapper.popF());
540 emit(out, "@1 /= @2;", smapper.getD(1), smapper.popD());
543 emit(out, "@1 %= @2;", smapper.getI(1), smapper.popI());
546 emit(out, "@1 %= @2;", smapper.getL(1), smapper.popL());
549 emit(out, "@1 %= @2;", smapper.getF(1), smapper.popF());
552 emit(out, "@1 %= @2;", smapper.getD(1), smapper.popD());
555 emit(out, "@1 &= @2;", smapper.getI(1), smapper.popI());
558 emit(out, "@1 &= @2;", smapper.getL(1), smapper.popL());
561 emit(out, "@1 |= @2;", smapper.getI(1), smapper.popI());
564 emit(out, "@1 |= @2;", smapper.getL(1), smapper.popL());
567 emit(out, "@1 ^= @2;", smapper.getI(1), smapper.popI());
570 emit(out, "@1 ^= @2;", smapper.getL(1), smapper.popL());
573 emit(out, "@1 = -@1;", smapper.getI(0));
576 emit(out, "@1 = -@1;", smapper.getL(0));
579 emit(out, "@1 = -@1;", smapper.getF(0));
582 emit(out, "@1 = -@1;", smapper.getD(0));
585 emit(out, "@1 <<= @2;", smapper.getI(1), smapper.popI());
588 emit(out, "@1 <<= @2;", smapper.getL(1), smapper.popI());
591 emit(out, "@1 >>= @2;", smapper.getI(1), smapper.popI());
594 emit(out, "@1 >>= @2;", smapper.getL(1), smapper.popI());
597 emit(out, "@1 >>>= @2;", smapper.getI(1), smapper.popI());
600 emit(out, "@1 >>>= @2;", smapper.getL(1), smapper.popI());
603 final int varIndx = readByte(byteCodes, ++i);
604 final int incrBy = byteCodes[++i];
606 emit(out, "@1++;", lmapper.getI(varIndx));
608 emit(out, "@1 += @2;",
609 lmapper.getI(varIndx),
610 Integer.toString(incrBy));
615 emit(out, "return;");
618 emit(out, "return @1;", smapper.popI());
621 emit(out, "return @1;", smapper.popL());
624 emit(out, "return @1;", smapper.popF());
627 emit(out, "return @1;", smapper.popD());
630 emit(out, "return @1;", smapper.popA());
633 emit(out, "@2 = @1;", smapper.popI(), smapper.pushL());
636 emit(out, "@2 = @1;", smapper.popI(), smapper.pushF());
639 emit(out, "@2 = @1;", smapper.popI(), smapper.pushD());
642 emit(out, "@2 = @1;", smapper.popL(), smapper.pushI());
646 emit(out, "@2 = @1;", smapper.popL(), smapper.pushF());
649 emit(out, "@2 = @1;", smapper.popL(), smapper.pushD());
652 emit(out, "@2 = @1;", smapper.popF(), smapper.pushD());
655 emit(out, "@2 = @1;", smapper.popD(), smapper.pushF());
658 emit(out, "@2 = Math.floor(@1);",
659 smapper.popF(), smapper.pushI());
662 emit(out, "@2 = Math.floor(@1);",
663 smapper.popF(), smapper.pushL());
666 emit(out, "@2 = Math.floor(@1);",
667 smapper.popD(), smapper.pushI());
670 emit(out, "@2 = Math.floor(@1);",
671 smapper.popD(), smapper.pushL());
676 out.append("{ /* number conversion */ }");
678 case opc_aconst_null:
679 emit(out, "@1 = null;", smapper.pushA());
682 emit(out, "@1 = -1;", smapper.pushI());
685 emit(out, "@1 = 0;", smapper.pushI());
688 emit(out, "@1 = 0;", smapper.pushD());
691 emit(out, "@1 = 0;", smapper.pushL());
694 emit(out, "@1 = 0;", smapper.pushF());
697 emit(out, "@1 = 1;", smapper.pushI());
700 emit(out, "@1 = 1;", smapper.pushL());
703 emit(out, "@1 = 1;", smapper.pushF());
706 emit(out, "@1 = 1;", smapper.pushD());
709 emit(out, "@1 = 2;", smapper.pushI());
712 emit(out, "@1 = 2;", smapper.pushF());
715 emit(out, "@1 = 3;", smapper.pushI());
718 emit(out, "@1 = 4;", smapper.pushI());
721 emit(out, "@1 = 5;", smapper.pushI());
724 int indx = readByte(byteCodes, ++i);
725 String v = encodeConstant(indx);
726 int type = VarType.fromConstantType(jc.getTag(indx));
727 emit(out, "@1 = @2;", smapper.pushT(type), v);
732 int indx = readIntArg(byteCodes, i);
734 String v = encodeConstant(indx);
735 int type = VarType.fromConstantType(jc.getTag(indx));
736 emit(out, "@1 = @2;", smapper.pushT(type), v);
740 emit(out, "@3 = (@2 == @1) ? 0 : ((@2 < @1) ? -1 : 1);",
741 smapper.popL(), smapper.popL(), smapper.pushI());
745 emit(out, "@3 = (@2 == @1) ? 0 : ((@2 < @1) ? -1 : 1);",
746 smapper.popF(), smapper.popF(), smapper.pushI());
750 emit(out, "@3 = (@2 == @1) ? 0 : ((@2 < @1) ? -1 : 1);",
751 smapper.popD(), smapper.popD(), smapper.pushI());
754 i = generateIf(byteCodes, i, smapper.popA(), smapper.popA(),
758 i = generateIf(byteCodes, i, smapper.popA(), smapper.popA(),
762 i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),
766 int indx = i + readIntArg(byteCodes, i);
767 emit(out, "if (@1 == 0) { gt = @2; continue; }",
768 smapper.popI(), Integer.toString(indx));
773 int indx = i + readIntArg(byteCodes, i);
774 emit(out, "if (@1 != 0) { gt = @2; continue; }",
775 smapper.popI(), Integer.toString(indx));
780 int indx = i + readIntArg(byteCodes, i);
781 emit(out, "if (@1 < 0) { gt = @2; continue; }",
782 smapper.popI(), Integer.toString(indx));
787 int indx = i + readIntArg(byteCodes, i);
788 emit(out, "if (@1 <= 0) { gt = @2; continue; }",
789 smapper.popI(), Integer.toString(indx));
794 int indx = i + readIntArg(byteCodes, i);
795 emit(out, "if (@1 > 0) { gt = @2; continue; }",
796 smapper.popI(), Integer.toString(indx));
801 int indx = i + readIntArg(byteCodes, i);
802 emit(out, "if (@1 >= 0) { gt = @2; continue; }",
803 smapper.popI(), Integer.toString(indx));
807 case opc_ifnonnull: {
808 int indx = i + readIntArg(byteCodes, i);
809 emit(out, "if (@1 !== null) { gt = @2; continue; }",
810 smapper.popA(), Integer.toString(indx));
815 int indx = i + readIntArg(byteCodes, i);
816 emit(out, "if (@1 === null) { gt = @2; continue; }",
817 smapper.popA(), Integer.toString(indx));
822 i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),
826 i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),
830 i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),
834 i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),
838 i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),
842 int indx = i + readIntArg(byteCodes, i);
843 emit(out, "gt = @1; continue;", Integer.toString(indx));
847 case opc_lookupswitch: {
848 int table = i / 4 * 4 + 4;
849 int dflt = i + readInt4(byteCodes, table);
851 int n = readInt4(byteCodes, table);
853 out.append("switch (").append(smapper.popI()).append(") {\n");
855 int cnstnt = readInt4(byteCodes, table);
857 int offset = i + readInt4(byteCodes, table);
859 out.append(" case " + cnstnt).append(": gt = " + offset).append("; continue;\n");
861 out.append(" default: gt = " + dflt).append("; continue;\n}");
865 case opc_tableswitch: {
866 int table = i / 4 * 4 + 4;
867 int dflt = i + readInt4(byteCodes, table);
869 int low = readInt4(byteCodes, table);
871 int high = readInt4(byteCodes, table);
873 out.append("switch (").append(smapper.popI()).append(") {\n");
874 while (low <= high) {
875 int offset = i + readInt4(byteCodes, table);
877 out.append(" case " + low).append(": gt = " + offset).append("; continue;\n");
880 out.append(" default: gt = " + dflt).append("; continue;\n}");
884 case opc_invokeinterface: {
885 i = invokeVirtualMethod(byteCodes, i, smapper) + 2;
888 case opc_invokevirtual:
889 i = invokeVirtualMethod(byteCodes, i, smapper);
891 case opc_invokespecial:
892 i = invokeStaticMethod(byteCodes, i, smapper, false);
894 case opc_invokestatic:
895 i = invokeStaticMethod(byteCodes, i, smapper, true);
898 int indx = readIntArg(byteCodes, i);
899 String ci = jc.getClassName(indx);
900 emit(out, "@1 = new @2;",
901 smapper.pushA(), accessClass(ci.replace('/', '_')));
907 ++i; // skip type of array
908 emit(out, "@2 = new Array(@1).fillNulls();",
909 smapper.popI(), smapper.pushA());
912 i += 2; // skip type of array
913 emit(out, "@2 = new Array(@1).fillNulls();",
914 smapper.popI(), smapper.pushA());
916 case opc_multianewarray: {
918 int dim = readByte(byteCodes, ++i);
919 out.append("{ var a0 = new Array(").append(smapper.popI())
920 .append(").fillNulls();");
921 for (int d = 1; d < dim; d++) {
922 out.append("\n var l" + d).append(" = ")
923 .append(smapper.popI()).append(';');
924 out.append("\n for (var i" + d).append (" = 0; i" + d).
925 append(" < a" + (d - 1)).
926 append(".length; i" + d).append("++) {");
927 out.append("\n var a" + d).
928 append (" = new Array(l" + d).append(").fillNulls();");
929 out.append("\n a" + (d - 1)).append("[i" + d).append("] = a" + d).
932 for (int d = 1; d < dim; d++) {
935 out.append("\n").append(smapper.pushA()).append(" = a0; }");
938 case opc_arraylength:
939 emit(out, "@2 = @1.length;", smapper.popA(), smapper.pushI());
942 emit(out, "@3[@2] = @1;",
943 smapper.popL(), smapper.popI(), smapper.popA());
946 emit(out, "@3[@2] = @1;",
947 smapper.popF(), smapper.popI(), smapper.popA());
950 emit(out, "@3[@2] = @1;",
951 smapper.popD(), smapper.popI(), smapper.popA());
954 emit(out, "@3[@2] = @1;",
955 smapper.popA(), smapper.popI(), smapper.popA());
961 emit(out, "@3[@2] = @1;",
962 smapper.popI(), smapper.popI(), smapper.popA());
965 emit(out, "@3 = @2[@1];",
966 smapper.popI(), smapper.popA(), smapper.pushL());
969 emit(out, "@3 = @2[@1];",
970 smapper.popI(), smapper.popA(), smapper.pushF());
973 emit(out, "@3 = @2[@1];",
974 smapper.popI(), smapper.popA(), smapper.pushD());
977 emit(out, "@3 = @2[@1];",
978 smapper.popI(), smapper.popA(), smapper.pushA());
984 emit(out, "@3 = @2[@1];",
985 smapper.popI(), smapper.popA(), smapper.pushI());
993 final Variable v = smapper.get(0);
994 emit(out, "@1 = @2;", smapper.pushT(v.getType()), v);
998 if (smapper.get(0).isCategory2()) {
999 final Variable v = smapper.get(0);
1000 emit(out, "@1 = @2;", smapper.pushT(v.getType()), v);
1002 final Variable v1 = smapper.get(0);
1003 final Variable v2 = smapper.get(1);
1004 emit(out, "{ @1 = @2; @3 = @4; }",
1005 smapper.pushT(v2.getType()), v2,
1006 smapper.pushT(v1.getType()), v1);
1011 final Variable vi1 = smapper.pop();
1012 final Variable vi2 = smapper.pop();
1013 final Variable vo3 = smapper.pushT(vi1.getType());
1014 final Variable vo2 = smapper.pushT(vi2.getType());
1015 final Variable vo1 = smapper.pushT(vi1.getType());
1017 emit(out, "{ @1 = @2; @3 = @4; @5 = @6; }",
1018 vo1, vi1, vo2, vi2, vo3, vo1);
1022 if (smapper.get(1).isCategory2()) {
1023 final Variable vi1 = smapper.pop();
1024 final Variable vi2 = smapper.pop();
1025 final Variable vo3 = smapper.pushT(vi1.getType());
1026 final Variable vo2 = smapper.pushT(vi2.getType());
1027 final Variable vo1 = smapper.pushT(vi1.getType());
1029 emit(out, "{ @1 = @2; @3 = @4; @5 = @6; }",
1030 vo1, vi1, vo2, vi2, vo3, vo1);
1032 final Variable vi1 = smapper.pop();
1033 final Variable vi2 = smapper.pop();
1034 final Variable vi3 = smapper.pop();
1035 final Variable vo4 = smapper.pushT(vi1.getType());
1036 final Variable vo3 = smapper.pushT(vi3.getType());
1037 final Variable vo2 = smapper.pushT(vi2.getType());
1038 final Variable vo1 = smapper.pushT(vi1.getType());
1040 emit(out, "{ @1 = @2; @3 = @4; @5 = @6; @7 = @8; }",
1041 vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);
1046 emit(out, "@1 = @2;",
1047 smapper.pushI(), Integer.toString(byteCodes[++i]));
1050 emit(out, "@1 = @2;",
1052 Integer.toString(readIntArg(byteCodes, i)));
1055 case opc_getfield: {
1056 int indx = readIntArg(byteCodes, i);
1057 String[] fi = jc.getFieldInfoName(indx);
1058 final int type = VarType.fromFieldType(fi[2].charAt(0));
1059 emit(out, "@2 = @1.fld_@3;",
1060 smapper.popA(), smapper.pushT(type), fi[1]);
1064 case opc_getstatic: {
1065 int indx = readIntArg(byteCodes, i);
1066 String[] fi = jc.getFieldInfoName(indx);
1067 final int type = VarType.fromFieldType(fi[2].charAt(0));
1068 emit(out, "@1 = @2(false).constructor.@3;",
1069 smapper.pushT(type),
1070 accessClass(fi[0].replace('/', '_')), fi[1]);
1072 addReference(fi[0]);
1075 case opc_putfield: {
1076 int indx = readIntArg(byteCodes, i);
1077 String[] fi = jc.getFieldInfoName(indx);
1078 final int type = VarType.fromFieldType(fi[2].charAt(0));
1079 emit(out, "@2.fld_@3 = @1;",
1080 smapper.popT(type), smapper.popA(), fi[1]);
1084 case opc_putstatic: {
1085 int indx = readIntArg(byteCodes, i);
1086 String[] fi = jc.getFieldInfoName(indx);
1087 final int type = VarType.fromFieldType(fi[2].charAt(0));
1088 emit(out, "@1(false).constructor.@2 = @3;",
1089 accessClass(fi[0].replace('/', '_')), fi[1],
1090 smapper.popT(type));
1092 addReference(fi[0]);
1095 case opc_checkcast: {
1096 int indx = readIntArg(byteCodes, i);
1097 final String type = jc.getClassName(indx);
1098 if (!type.startsWith("[")) {
1099 // no way to check arrays right now
1100 // XXX proper exception
1102 "if (@1 !== null && !@1.$instOf_@2) throw {};",
1103 smapper.getA(0), type.replace('/', '_'));
1108 case opc_instanceof: {
1109 int indx = readIntArg(byteCodes, i);
1110 final String type = jc.getClassName(indx);
1111 emit(out, "@2 = @1.$instOf_@3 ? 1 : 0;",
1112 smapper.popA(), smapper.pushI(),
1113 type.replace('/', '_'));
1118 final Variable v = smapper.popA();
1121 emit(out, "{ @1 = @2; throw @2; }",
1122 smapper.pushA(), v);
1126 case opc_monitorenter: {
1127 out.append("/* monitor enter */");
1132 case opc_monitorexit: {
1133 out.append("/* monitor exit */");
1139 emit(out, "throw 'unknown bytecode @1';",
1140 Integer.toString(c));
1144 for (int j = prev; j <= i; j++) {
1146 final int cc = readByte(byteCodes, j);
1147 out.append(Integer.toString(cc));
1152 if (previousTrap != null) {
1153 generateCatch(previousTrap);
1159 private int generateIf(byte[] byteCodes, int i,
1160 final Variable v2, final Variable v1,
1161 final String test) throws IOException {
1162 int indx = i + readIntArg(byteCodes, i);
1163 out.append("if (").append(v1)
1164 .append(' ').append(test).append(' ')
1165 .append(v2).append(") { gt = " + indx)
1166 .append("; continue; }");
1170 private int readIntArg(byte[] byteCodes, int offsetInstruction) {
1171 final int indxHi = byteCodes[offsetInstruction + 1] << 8;
1172 final int indxLo = byteCodes[offsetInstruction + 2];
1173 return (indxHi & 0xffffff00) | (indxLo & 0xff);
1175 private int readInt4(byte[] byteCodes, int offsetInstruction) {
1176 final int d = byteCodes[offsetInstruction + 0] << 24;
1177 final int c = byteCodes[offsetInstruction + 1] << 16;
1178 final int b = byteCodes[offsetInstruction + 2] << 8;
1179 final int a = byteCodes[offsetInstruction + 3];
1180 return (d & 0xff000000) | (c & 0xff0000) | (b & 0xff00) | (a & 0xff);
1182 private int readByte(byte[] byteCodes, int offsetInstruction) {
1183 return byteCodes[offsetInstruction] & 0xff;
1186 private static void countArgs(String descriptor, char[] returnType, StringBuilder sig, StringBuilder cnt) {
1188 Boolean count = null;
1189 boolean array = false;
1191 int firstPos = sig.length();
1192 while (i < descriptor.length()) {
1193 char ch = descriptor.charAt(i++);
1214 if (ch == 'J' || ch == 'D') {
1220 sig.insert(firstPos, ch);
1222 returnType[0] = '[';
1223 sig.insert(firstPos, "_3");
1232 returnType[0] = 'V';
1233 sig.insert(firstPos, 'V');
1236 int next = descriptor.indexOf(';', i);
1237 String realSig = mangleSig(descriptor, i - 1, next + 1);
1242 sig.append(realSig);
1245 sig.insert(firstPos, realSig);
1247 sig.insert(firstPos, "_3");
1249 returnType[0] = 'L';
1257 throw new IllegalStateException("Invalid char: " + ch);
1262 private static String mangleSig(String txt, int first, int last) {
1263 StringBuilder sb = new StringBuilder();
1264 for (int i = first; i < last; i++) {
1265 final char ch = txt.charAt(i);
1267 case '/': sb.append('_'); break;
1268 case '_': sb.append("_1"); break;
1269 case ';': sb.append("_2"); break;
1270 case '[': sb.append("_3"); break;
1271 default: sb.append(ch); break;
1274 return sb.toString();
1277 private static String findMethodName(MethodData m, StringBuilder cnt) {
1278 StringBuilder name = new StringBuilder();
1279 if ("<init>".equals(m.getName())) { // NOI18N
1280 name.append("cons"); // NOI18N
1281 } else if ("<clinit>".equals(m.getName())) { // NOI18N
1282 name.append("class"); // NOI18N
1284 name.append(m.getName());
1287 countArgs(m.getInternalSig(), new char[1], name, cnt);
1288 return name.toString();
1291 static String findMethodName(String[] mi, StringBuilder cnt, char[] returnType) {
1292 StringBuilder name = new StringBuilder();
1293 String descr = mi[2];//mi.getDescriptor();
1295 if ("<init>".equals(nm)) { // NOI18N
1296 name.append("cons"); // NOI18N
1300 countArgs(descr, returnType, name, cnt);
1301 return name.toString();
1304 private int invokeStaticMethod(byte[] byteCodes, int i, final StackMapper mapper, boolean isStatic)
1305 throws IOException {
1306 int methodIndex = readIntArg(byteCodes, i);
1307 String[] mi = jc.getFieldInfoName(methodIndex);
1308 char[] returnType = { 'V' };
1309 StringBuilder cnt = new StringBuilder();
1310 String mn = findMethodName(mi, cnt, returnType);
1312 final int numArguments = isStatic ? cnt.length() : cnt.length() + 1;
1313 final Variable[] vars = new Variable[numArguments];
1315 for (int j = numArguments - 1; j >= 0; --j) {
1316 vars[j] = mapper.pop();
1319 if (returnType[0] != 'V') {
1320 out.append(mapper.pushT(VarType.fromFieldType(returnType[0])))
1324 final String in = mi[0];
1325 out.append(accessClass(in.replace('/', '_')));
1326 out.append("(false).");
1327 if (mn.startsWith("cons_")) {
1328 out.append("constructor.");
1332 if (numArguments > 0) {
1333 out.append(vars[0]);
1334 for (int j = 1; j < numArguments; ++j) {
1336 out.append(vars[j]);
1344 private int invokeVirtualMethod(byte[] byteCodes, int i, final StackMapper mapper)
1345 throws IOException {
1346 int methodIndex = readIntArg(byteCodes, i);
1347 String[] mi = jc.getFieldInfoName(methodIndex);
1348 char[] returnType = { 'V' };
1349 StringBuilder cnt = new StringBuilder();
1350 String mn = findMethodName(mi, cnt, returnType);
1352 final int numArguments = cnt.length() + 1;
1353 final Variable[] vars = new Variable[numArguments];
1355 for (int j = numArguments - 1; j >= 0; --j) {
1356 vars[j] = mapper.pop();
1359 if (returnType[0] != 'V') {
1360 out.append(mapper.pushT(VarType.fromFieldType(returnType[0])))
1364 out.append(vars[0]).append('.');
1367 out.append(vars[0]);
1368 for (int j = 1; j < numArguments; ++j) {
1370 out.append(vars[j]);
1377 private void addReference(String cn) throws IOException {
1378 if (requireReference(cn)) {
1379 debug(" /* needs " + cn + " */");
1383 private void outType(String d, StringBuilder out) {
1385 while (d.charAt(0) == '[') {
1389 if (d.charAt(0) == 'L') {
1390 assert d.charAt(d.length() - 1) == ';';
1391 out.append(d.replace('/', '_').substring(0, d.length() - 1));
1397 private String encodeConstant(int entryIndex) throws IOException {
1398 String[] classRef = { null };
1399 String s = jc.stringValue(entryIndex, classRef);
1400 if (classRef[0] != null) {
1401 addReference(classRef[0]);
1402 s = accessClass(s.replace('/', '_')) + "(false).constructor.$class";
1407 private String javaScriptBody(String prefix, MethodData m, boolean isStatic) throws IOException {
1408 byte[] arr = m.findAnnotationData(true);
1412 final String jvmType = "Lorg/apidesign/bck2brwsr/core/JavaScriptBody;";
1413 class P extends AnnotationParser {
1419 String[] args = new String[30];
1423 protected void visitAttr(String type, String attr, String at, String value) {
1424 if (type.equals(jvmType)) {
1425 if ("body".equals(attr)) {
1427 } else if ("args".equals(attr)) {
1428 args[cnt++] = value;
1430 throw new IllegalArgumentException(attr);
1437 if (p.body == null) {
1440 StringBuilder cnt = new StringBuilder();
1441 final String mn = findMethodName(m, cnt);
1442 out.append(prefix).append(mn);
1443 out.append(" = function(");
1447 space = outputArg(out, p.args, 0);
1453 for (int i = 0; i < cnt.length(); i++) {
1455 space = outputArg(out, p.args, index);
1458 out.append(") {").append("\n");
1460 out.append("\n}\n");
1463 private static String className(ClassData jc) {
1464 //return jc.getName().getInternalName().replace('/', '_');
1465 return jc.getClassName().replace('/', '_');
1468 private static String[] findAnnotation(
1469 byte[] arr, ClassData cd, final String className,
1470 final String... attrNames
1471 ) throws IOException {
1475 final String[] values = new String[attrNames.length];
1476 final boolean[] found = { false };
1477 final String jvmType = "L" + className.replace('.', '/') + ";";
1478 AnnotationParser ap = new AnnotationParser(false) {
1480 protected void visitAttr(String type, String attr, String at, String value) {
1481 if (type.equals(jvmType)) {
1483 for (int i = 0; i < attrNames.length; i++) {
1484 if (attrNames[i].equals(attr)) {
1493 return found[0] ? values : null;
1496 private CharSequence initField(FieldData v) {
1497 final String is = v.getInternalSig();
1498 if (is.length() == 1) {
1499 switch (is.charAt(0)) {
1505 case 'I': return " = 0;";
1507 case 'D': return " = 0.0;";
1509 throw new IllegalStateException(is);
1515 private static void generateAnno(ClassData cd, final Appendable out, byte[] data) throws IOException {
1516 AnnotationParser ap = new AnnotationParser(true) {
1521 protected void visitAnnotationStart(String type) throws IOException {
1525 out.append('"').append(type).append("\" : {\n");
1530 protected void visitAnnotationEnd(String type) throws IOException {
1531 out.append("\n}\n");
1535 protected void visitAttr(String type, String attr, String attrType, String value)
1536 throws IOException {
1543 out.append(attr).append("__").append(attrType).append(" : ").append(value);
1549 private static String outputArg(Appendable out, String[] args, int indx) throws IOException {
1550 final String name = args[indx];
1554 if (name.contains(",")) {
1555 throw new IOException("Wrong parameter with ',': " + name);
1561 private static void emit(final Appendable out,
1562 final String format,
1563 final CharSequence... params) throws IOException {
1564 final int length = format.length();
1567 int paramOffset = format.indexOf('@');
1568 while ((paramOffset != -1) && (paramOffset < (length - 1))) {
1569 final char paramChar = format.charAt(paramOffset + 1);
1570 if ((paramChar >= '1') && (paramChar <= '9')) {
1571 final int paramIndex = paramChar - '0' - 1;
1573 out.append(format, processed, paramOffset);
1574 out.append(params[paramIndex]);
1577 processed = paramOffset + 1;
1580 paramOffset = format.indexOf('@', paramOffset + 1);
1583 out.append(format, processed, length);
1586 private void generateCatch(TrapData[] traps) throws IOException {
1587 out.append("} catch (e) {\n");
1589 for (TrapData e : traps) {
1593 if (e.catch_cpx != 0) { //not finally
1594 final String classInternalName = jc.getClassName(e.catch_cpx);
1595 addReference(classInternalName);
1596 out.append("if (e.$instOf_" + classInternalName.replace('/', '_') + ") {");
1597 out.append("gt=" + e.handler_pc + "; stA0 = e; continue;");
1600 finallyPC = e.handler_pc;
1603 if (finallyPC == -1) {
1604 out.append("throw e;");
1606 out.append("gt=" + finallyPC + "; stA0 = e; continue;");