hg/bck2brwsr: vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java@5e13b1ac2886

     1 /**

     2  * Back 2 Browser Bytecode Translator

     3  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

     4  *

     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.

     8  *

     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.

    13  *

    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.

    17  */

    18 package org.apidesign.vm4brwsr;

    20 import java.io.IOException;

    21 import java.io.InputStream;

    22 import org.apidesign.bck2brwsr.core.JavaScriptBody;

    23 import org.apidesign.javap.AnnotationParser;

    24 import org.apidesign.javap.ClassData;

    25 import org.apidesign.javap.FieldData;

    26 import org.apidesign.javap.MethodData;

    27 import org.apidesign.javap.StackMapIterator;

    28 import static org.apidesign.javap.RuntimeConstants.*;

    29 import org.apidesign.javap.TrapData;

    30 import org.apidesign.javap.TrapDataIterator;

    32 /** Translator of the code inside class files to JavaScript.

    33  *

    34  * @author Jaroslav Tulach <jtulach@netbeans.org>

    35  */

    36 abstract class ByteCodeToJavaScript {

    37     private ClassData jc;

    38     final Appendable out;

    40     protected ByteCodeToJavaScript(Appendable out) {

    41         this.out = out;

    42     }

    44     /* Collects additional required resources.

    45      *

    46      * @param internalClassName classes that were referenced and should be loaded in order the

    47      *   generated JavaScript code works properly. The names are in internal

    48      *   JVM form so String is <code>java/lang/String</code>.

    49      */

    50     protected abstract boolean requireReference(String internalClassName);

    52     /*

    53      * @param resourcePath name of resources to read

    54      */

    55     protected abstract void requireScript(String resourcePath) throws IOException;

    57     /** Allows subclasses to redefine what field a function representing a

    58      * class gets assigned. By default it returns the suggested name followed

    59      * by <code>" = "</code>;

    60      *

    61      * @param className suggested name of the class

    62      */

    63     /* protected */ String assignClass(String className) {

    64         return className + " = ";

    65     }

    66     /* protected */ String accessClass(String classOperation) {

    67         return classOperation;

    68     }

    70     /** Prints out a debug message.

    71      *

    72      * @param msg the message

    73      * @return true if the message has been printed

    74      * @throws IOException

    75      */

    76     boolean debug(String msg) throws IOException {

    77         out.append(msg);

    78         return true;

    79     }

    81     /**

    82      * Converts a given class file to a JavaScript version.

    83      *

    84      * @param classFile input stream with code of the .class file

    85      * @return the initialization code for this class, if any. Otherwise <code>null</code>

    86      *

    87      * @throws IOException if something goes wrong during read or write or translating

    88      */

    90     public String compile(InputStream classFile) throws IOException {

    91         this.jc = new ClassData(classFile);

    92         if (jc.getMajor_version() < 50) {

    93             throw new IOException("Can't compile " + jc.getClassName() + ". Class file version " + jc.getMajor_version() + "."

    94                 + jc.getMinor_version() + " - recompile with -target 1.6 (at least)."

    95             );

    96         }

    97         byte[] arrData = jc.findAnnotationData(true);

    98         String[] arr = findAnnotation(arrData, jc,

    99             "org.apidesign.bck2brwsr.core.ExtraJavaScript",

   100             "resource", "processByteCode"

   101         );

   102         if (arr != null) {

   103             requireScript(arr[0]);

   104             if ("0".equals(arr[1])) {

   105                 return null;

   106             }

   107         }

   108         String[] proto = findAnnotation(arrData, jc,

   109             "org.apidesign.bck2brwsr.core.JavaScriptPrototype",

   110             "container", "prototype"

   111         );

   112         StringArray toInitilize = new StringArray();

   113         final String className = className(jc);

   114         out.append("\n\n").append(assignClass(className));

   115         out.append("function CLS() {");

   116         out.append("\n  if (!CLS.prototype.$instOf_").append(className).append(") {");

   117         if (proto == null) {

   118             String sc = jc.getSuperClassName(); // with _

   119             out.append("\n    var pp = ").

   120                 append(accessClass(sc.replace('/', '_'))).append("(true);");

   121             out.append("\n    var p = CLS.prototype = pp;");

   122             out.append("\n    var c = p;");

   123             out.append("\n    var sprcls = pp.constructor.$class;");

   124         } else {

   125             out.append("\n    var p = CLS.prototype = ").append(proto[1]).append(";");

   126             if (proto[0] == null) {

   127                 proto[0] = "p";

   128             }

   129             out.append("\n    var c = ").append(proto[0]).append(";");

   130             out.append("\n    var sprcls = null;");

   131         }

   132         for (FieldData v : jc.getFields()) {

   133             if (v.isStatic()) {

   134                 out.append("\n  CLS.").append(v.getName()).append(initField(v));

   135             } else {

   136                 out.append("\n  c._").append(v.getName()).append(" = function (v) {")

   137                    .append("  if (arguments.length == 1) this.fld_").

   138                     append(className).append('_').append(v.getName())

   139                    .append(" = v; return this.fld_").

   140                     append(className).append('_').append(v.getName())

   141                    .append("; };");

   142             }

   143         }

   144         for (MethodData m : jc.getMethods()) {

   145             byte[] onlyArr = m.findAnnotationData(true);

   146             String[] only = findAnnotation(onlyArr, jc,

   147                 "org.apidesign.bck2brwsr.core.JavaScriptOnly",

   148                 "name", "value"

   149             );

   150             if (only != null) {

   151                 if (only[0] != null && only[1] != null) {

   152                     out.append("\n    p.").append(only[0]).append(" = ")

   153                         .append(only[1]).append(";");

   154                 }

   155                 continue;

   156             }

   157             String prefix;

   158             String mn;

   159             if (m.isStatic()) {

   160                 prefix = "\n    c.";

   161                 mn = generateStaticMethod(prefix, m, toInitilize);

   162             } else {

   163                 if (m.isConstructor()) {

   164                     prefix = "\n    CLS.";

   165                     mn = generateInstanceMethod(prefix, m);

   166                 } else {

   167                     prefix = "\n    c.";

   168                     mn = generateInstanceMethod(prefix, m);

   169                 }

   170             }

   171             byte[] runAnno = m.findAnnotationData(false);

   172             if (runAnno != null) {

   173                 out.append(prefix).append(mn).append(".anno = {");

   174                 generateAnno(jc, out, runAnno);

   175                 out.append("\n    };");

   176             }

   177             out.append(prefix).append(mn).append(".access = " + m.getAccess()).append(";");

   178         }

   179         out.append("\n    c.constructor = CLS;");

   180         out.append("\n    c.$instOf_").append(className).append(" = true;");

   181         for (String superInterface : jc.getSuperInterfaces()) {

   182             out.append("\n    c.$instOf_").append(superInterface.replace('/', '_')).append(" = true;");

   183         }

   184         out.append("\n    CLS.$class = ");

   185         out.append(accessClass("java_lang_Class(true);"));

   186         out.append("\n    CLS.$class.jvmName = '").append(jc.getClassName()).append("';");

   187         out.append("\n    CLS.$class.superclass = sprcls;");

   188         out.append("\n    CLS.$class.access = ").append(jc.getAccessFlags()+";");

   189         out.append("\n    CLS.$class.cnstr = CLS;");

   190         byte[] classAnno = jc.findAnnotationData(false);

   191         if (classAnno != null) {

   192             out.append("\n    CLS.$class.anno = {");

   193             generateAnno(jc, out, classAnno);

   194             out.append("\n    };");

   195         }

   196         out.append("\n  }");

   197         out.append("\n  if (arguments.length === 0) {");

   198         out.append("\n    if (!(this instanceof CLS)) {");

   199         out.append("\n      return new CLS();");

   200         out.append("\n    }");

   201         for (FieldData v : jc.getFields()) {

   202             byte[] onlyArr = v.findAnnotationData(true);

   203             String[] only = findAnnotation(onlyArr, jc,

   204                 "org.apidesign.bck2brwsr.core.JavaScriptOnly",

   205                 "name", "value"

   206             );

   207             if (only != null) {

   208                 if (only[0] != null && only[1] != null) {

   209                     out.append("\n    p.").append(only[0]).append(" = ")

   210                         .append(only[1]).append(";");

   211                 }

   212                 continue;

   213             }

   214             if (!v.isStatic()) {

   215                 out.append("\n    this.fld_").

   216                     append(className).append('_').

   217                     append(v.getName()).append(initField(v));

   218             }

   219         }

   220         out.append("\n    return this;");

   221         out.append("\n  }");

   222         out.append("\n  return arguments[0] ? new CLS() : CLS.prototype;");

   223         out.append("\n};");

   224         StringBuilder sb = new StringBuilder();

   225         for (String init : toInitilize.toArray()) {

   226             sb.append("\n").append(init).append("();");

   227         }

   228         return sb.toString();

   229     }

   230     private String generateStaticMethod(String prefix, MethodData m, StringArray toInitilize) throws IOException {

   231         String jsb = javaScriptBody(prefix, m, true);

   232         if (jsb != null) {

   233             return jsb;

   234         }

   235         final String mn = findMethodName(m, new StringBuilder());

   236         if (mn.equals("class__V")) {

   237             toInitilize.add(accessClass(className(jc)) + "(false)." + mn);

   238         }

   239         generateMethod(prefix, mn, m);

   240         return mn;

   241     }

   243     private String generateInstanceMethod(String prefix, MethodData m) throws IOException {

   244         String jsb = javaScriptBody(prefix, m, false);

   245         if (jsb != null) {

   246             return jsb;

   247         }

   248         final String mn = findMethodName(m, new StringBuilder());

   249         generateMethod(prefix, mn, m);

   250         return mn;

   251     }

   253     private void generateMethod(String prefix, String name, MethodData m)

   254             throws IOException {

   255         final StackMapIterator stackMapIterator = m.createStackMapIterator();

   256         TrapDataIterator trap = m.getTrapDataIterator();

   257         final LocalsMapper lmapper =

   258                 new LocalsMapper(stackMapIterator.getArguments());

   260         out.append(prefix).append(name).append(" = function(");

   261         lmapper.outputArguments(out, m.isStatic());

   262         out.append(") {").append("\n");

   264         final byte[] byteCodes = m.getCode();

   265         if (byteCodes == null) {

   266             out.append("  throw 'no code found for ")

   267                .append(jc.getClassName()).append('.')

   268                .append(m.getName()).append("';\n");

   269             out.append("};");

   270             return;

   271         }

   273         final StackMapper smapper = new StackMapper();

   275         if (!m.isStatic()) {

   276             out.append("  var ").append(" lcA0 = this;\n");

   277         }

   279         int lastStackFrame = -1;

   280         TrapData[] previousTrap = null;

   281         boolean wide = false;

   283         out.append("\n  var gt = 0;\n  for(;;) switch(gt) {\n");

   284         for (int i = 0; i < byteCodes.length; i++) {

   285             int prev = i;

   286             stackMapIterator.advanceTo(i);

   287             boolean changeInCatch = trap.advanceTo(i);

   288             if (changeInCatch || lastStackFrame != stackMapIterator.getFrameIndex()) {

   289                 if (previousTrap != null) {

   290                     generateCatch(previousTrap);

   291                     previousTrap = null;

   292                 }

   293             }

   294             if (lastStackFrame != stackMapIterator.getFrameIndex()) {

   295                 lastStackFrame = stackMapIterator.getFrameIndex();

   296                 lmapper.syncWithFrameLocals(stackMapIterator.getFrameLocals());

   297                 smapper.syncWithFrameStack(stackMapIterator.getFrameStack());

   298                 out.append("    case " + i).append(": ");

   299                 changeInCatch = true;

   300             } else {

   301                 debug("    /* " + i + " */ ");

   302             }

   303             if (changeInCatch && trap.useTry()) {

   304                 out.append("try {");

   305                 previousTrap = trap.current();

   306             }

   307             final int c = readUByte(byteCodes, i);

   308             switch (c) {

   309                 case opc_aload_0:

   310                     emit(out, "var @1 = @2;", smapper.pushA(), lmapper.getA(0));

   311                     break;

   312                 case opc_iload_0:

   313                     emit(out, "var @1 = @2;", smapper.pushI(), lmapper.getI(0));

   314                     break;

   315                 case opc_lload_0:

   316                     emit(out, "var @1 = @2;", smapper.pushL(), lmapper.getL(0));

   317                     break;

   318                 case opc_fload_0:

   319                     emit(out, "var @1 = @2;", smapper.pushF(), lmapper.getF(0));

   320                     break;

   321                 case opc_dload_0:

   322                     emit(out, "var @1 = @2;", smapper.pushD(), lmapper.getD(0));

   323                     break;

   324                 case opc_aload_1:

   325                     emit(out, "var @1 = @2;", smapper.pushA(), lmapper.getA(1));

   326                     break;

   327                 case opc_iload_1:

   328                     emit(out, "var @1 = @2;", smapper.pushI(), lmapper.getI(1));

   329                     break;

   330                 case opc_lload_1:

   331                     emit(out, "var @1 = @2;", smapper.pushL(), lmapper.getL(1));

   332                     break;

   333                 case opc_fload_1:

   334                     emit(out, "var @1 = @2;", smapper.pushF(), lmapper.getF(1));

   335                     break;

   336                 case opc_dload_1:

   337                     emit(out, "var @1 = @2;", smapper.pushD(), lmapper.getD(1));

   338                     break;

   339                 case opc_aload_2:

   340                     emit(out, "var @1 = @2;", smapper.pushA(), lmapper.getA(2));

   341                     break;

   342                 case opc_iload_2:

   343                     emit(out, "var @1 = @2;", smapper.pushI(), lmapper.getI(2));

   344                     break;

   345                 case opc_lload_2:

   346                     emit(out, "var @1 = @2;", smapper.pushL(), lmapper.getL(2));

   347                     break;

   348                 case opc_fload_2:

   349                     emit(out, "var @1 = @2;", smapper.pushF(), lmapper.getF(2));

   350                     break;

   351                 case opc_dload_2:

   352                     emit(out, "var @1 = @2;", smapper.pushD(), lmapper.getD(2));

   353                     break;

   354                 case opc_aload_3:

   355                     emit(out, "var @1 = @2;", smapper.pushA(), lmapper.getA(3));

   356                     break;

   357                 case opc_iload_3:

   358                     emit(out, "var @1 = @2;", smapper.pushI(), lmapper.getI(3));

   359                     break;

   360                 case opc_lload_3:

   361                     emit(out, "var @1 = @2;", smapper.pushL(), lmapper.getL(3));

   362                     break;

   363                 case opc_fload_3:

   364                     emit(out, "var @1 = @2;", smapper.pushF(), lmapper.getF(3));

   365                     break;

   366                 case opc_dload_3:

   367                     emit(out, "var @1 = @2;", smapper.pushD(), lmapper.getD(3));

   368                     break;

   369                 case opc_iload: {

   370                     ++i;

   371                     final int indx = wide ? readUShort(byteCodes, i++)

   372                                           : readUByte(byteCodes, i);

   373                     wide = false;

   374                     emit(out, "var @1 = @2;",

   375                          smapper.pushI(), lmapper.getI(indx));

   376                     break;

   377                 }

   378                 case opc_lload: {

   379                     ++i;

   380                     final int indx = wide ? readUShort(byteCodes, i++)

   381                                           : readUByte(byteCodes, i);

   382                     wide = false;

   383                     emit(out, "var @1 = @2;",

   384                          smapper.pushL(), lmapper.getL(indx));

   385                     break;

   386                 }

   387                 case opc_fload: {

   388                     ++i;

   389                     final int indx = wide ? readUShort(byteCodes, i++)

   390                                           : readUByte(byteCodes, i);

   391                     wide = false;

   392                     emit(out, "var @1 = @2;",

   393                          smapper.pushF(), lmapper.getF(indx));

   394                     break;

   395                 }

   396                 case opc_dload: {

   397                     ++i;

   398                     final int indx = wide ? readUShort(byteCodes, i++)

   399                                           : readUByte(byteCodes, i);

   400                     wide = false;

   401                     emit(out, "var @1 = @2;",

   402                          smapper.pushD(), lmapper.getD(indx));

   403                     break;

   404                 }

   405                 case opc_aload: {

   406                     ++i;

   407                     final int indx = wide ? readUShort(byteCodes, i++)

   408                                           : readUByte(byteCodes, i);

   409                     wide = false;

   410                     emit(out, "var @1 = @2;",

   411                          smapper.pushA(), lmapper.getA(indx));

   412                     break;

   413                 }

   414                 case opc_istore: {

   415                     ++i;

   416                     final int indx = wide ? readUShort(byteCodes, i++)

   417                                           : readUByte(byteCodes, i);

   418                     wide = false;

   419                     emit(out, "var @1 = @2;",

   420                          lmapper.setI(indx), smapper.popI());

   421                     break;

   422                 }

   423                 case opc_lstore: {

   424                     ++i;

   425                     final int indx = wide ? readUShort(byteCodes, i++)

   426                                           : readUByte(byteCodes, i);

   427                     wide = false;

   428                     emit(out, "var @1 = @2;",

   429                          lmapper.setL(indx), smapper.popL());

   430                     break;

   431                 }

   432                 case opc_fstore: {

   433                     ++i;

   434                     final int indx = wide ? readUShort(byteCodes, i++)

   435                                           : readUByte(byteCodes, i);

   436                     wide = false;

   437                     emit(out, "var @1 = @2;",

   438                          lmapper.setF(indx), smapper.popF());

   439                     break;

   440                 }

   441                 case opc_dstore: {

   442                     ++i;

   443                     final int indx = wide ? readUShort(byteCodes, i++)

   444                                           : readUByte(byteCodes, i);

   445                     wide = false;

   446                     emit(out, "var @1 = @2;",

   447                          lmapper.setD(indx), smapper.popD());

   448                     break;

   449                 }

   450                 case opc_astore: {

   451                     ++i;

   452                     final int indx = wide ? readUShort(byteCodes, i++)

   453                                           : readUByte(byteCodes, i);

   454                     wide = false;

   455                     emit(out, "var @1 = @2;",

   456                          lmapper.setA(indx), smapper.popA());

   457                     break;

   458                 }

   459                 case opc_astore_0:

   460                     emit(out, "var @1 = @2;", lmapper.setA(0), smapper.popA());

   461                     break;

   462                 case opc_istore_0:

   463                     emit(out, "var @1 = @2;", lmapper.setI(0), smapper.popI());

   464                     break;

   465                 case opc_lstore_0:

   466                     emit(out, "var @1 = @2;", lmapper.setL(0), smapper.popL());

   467                     break;

   468                 case opc_fstore_0:

   469                     emit(out, "var @1 = @2;", lmapper.setF(0), smapper.popF());

   470                     break;

   471                 case opc_dstore_0:

   472                     emit(out, "var @1 = @2;", lmapper.setD(0), smapper.popD());

   473                     break;

   474                 case opc_astore_1:

   475                     emit(out, "var @1 = @2;", lmapper.setA(1), smapper.popA());

   476                     break;

   477                 case opc_istore_1:

   478                     emit(out, "var @1 = @2;", lmapper.setI(1), smapper.popI());

   479                     break;

   480                 case opc_lstore_1:

   481                     emit(out, "var @1 = @2;", lmapper.setL(1), smapper.popL());

   482                     break;

   483                 case opc_fstore_1:

   484                     emit(out, "var @1 = @2;", lmapper.setF(1), smapper.popF());

   485                     break;

   486                 case opc_dstore_1:

   487                     emit(out, "var @1 = @2;", lmapper.setD(1), smapper.popD());

   488                     break;

   489                 case opc_astore_2:

   490                     emit(out, "var @1 = @2;", lmapper.setA(2), smapper.popA());

   491                     break;

   492                 case opc_istore_2:

   493                     emit(out, "var @1 = @2;", lmapper.setI(2), smapper.popI());

   494                     break;

   495                 case opc_lstore_2:

   496                     emit(out, "var @1 = @2;", lmapper.setL(2), smapper.popL());

   497                     break;

   498                 case opc_fstore_2:

   499                     emit(out, "var @1 = @2;", lmapper.setF(2), smapper.popF());

   500                     break;

   501                 case opc_dstore_2:

   502                     emit(out, "var @1 = @2;", lmapper.setD(2), smapper.popD());

   503                     break;

   504                 case opc_astore_3:

   505                     emit(out, "var @1 = @2;", lmapper.setA(3), smapper.popA());

   506                     break;

   507                 case opc_istore_3:

   508                     emit(out, "var @1 = @2;", lmapper.setI(3), smapper.popI());

   509                     break;

   510                 case opc_lstore_3:

   511                     emit(out, "var @1 = @2;", lmapper.setL(3), smapper.popL());

   512                     break;

   513                 case opc_fstore_3:

   514                     emit(out, "var @1 = @2;", lmapper.setF(3), smapper.popF());

   515                     break;

   516                 case opc_dstore_3:

   517                     emit(out, "var @1 = @2;", lmapper.setD(3), smapper.popD());

   518                     break;

   519                 case opc_iadd:

   520                     emit(out, "@1 = @1.add32(@2);", smapper.getI(1), smapper.popI());

   521                     break;

   522                 case opc_ladd:

   523                     emit(out, "@1 += @2;", smapper.getL(1), smapper.popL());

   524                     break;

   525                 case opc_fadd:

   526                     emit(out, "@1 += @2;", smapper.getF(1), smapper.popF());

   527                     break;

   528                 case opc_dadd:

   529                     emit(out, "@1 += @2;", smapper.getD(1), smapper.popD());

   530                     break;

   531                 case opc_isub:

   532                     emit(out, "@1 = @1.sub32(@2);", smapper.getI(1), smapper.popI());

   533                     break;

   534                 case opc_lsub:

   535                     emit(out, "@1 -= @2;", smapper.getL(1), smapper.popL());

   536                     break;

   537                 case opc_fsub:

   538                     emit(out, "@1 -= @2;", smapper.getF(1), smapper.popF());

   539                     break;

   540                 case opc_dsub:

   541                     emit(out, "@1 -= @2;", smapper.getD(1), smapper.popD());

   542                     break;

   543                 case opc_imul:

   544                     emit(out, "@1 = @1.mul32(@2);", smapper.getI(1), smapper.popI());

   545                     break;

   546                 case opc_lmul:

   547                     emit(out, "@1 *= @2;", smapper.getL(1), smapper.popL());

   548                     break;

   549                 case opc_fmul:

   550                     emit(out, "@1 *= @2;", smapper.getF(1), smapper.popF());

   551                     break;

   552                 case opc_dmul:

   553                     emit(out, "@1 *= @2;", smapper.getD(1), smapper.popD());

   554                     break;

   555                 case opc_idiv:

   556                     emit(out, "@1 = Math.floor(@1 / @2);",

   557                          smapper.getI(1), smapper.popI());

   558                     break;

   559                 case opc_ldiv:

   560                     emit(out, "@1 = Math.floor(@1 / @2);",

   561                          smapper.getL(1), smapper.popL());

   562                     break;

   563                 case opc_fdiv:

   564                     emit(out, "@1 /= @2;", smapper.getF(1), smapper.popF());

   565                     break;

   566                 case opc_ddiv:

   567                     emit(out, "@1 /= @2;", smapper.getD(1), smapper.popD());

   568                     break;

   569                 case opc_irem:

   570                     emit(out, "@1 %= @2;", smapper.getI(1), smapper.popI());

   571                     break;

   572                 case opc_lrem:

   573                     emit(out, "@1 %= @2;", smapper.getL(1), smapper.popL());

   574                     break;

   575                 case opc_frem:

   576                     emit(out, "@1 %= @2;", smapper.getF(1), smapper.popF());

   577                     break;

   578                 case opc_drem:

   579                     emit(out, "@1 %= @2;", smapper.getD(1), smapper.popD());

   580                     break;

   581                 case opc_iand:

   582                     emit(out, "@1 &= @2;", smapper.getI(1), smapper.popI());

   583                     break;

   584                 case opc_land:

   585                     emit(out, "@1 &= @2;", smapper.getL(1), smapper.popL());

   586                     break;

   587                 case opc_ior:

   588                     emit(out, "@1 |= @2;", smapper.getI(1), smapper.popI());

   589                     break;

   590                 case opc_lor:

   591                     emit(out, "@1 |= @2;", smapper.getL(1), smapper.popL());

   592                     break;

   593                 case opc_ixor:

   594                     emit(out, "@1 ^= @2;", smapper.getI(1), smapper.popI());

   595                     break;

   596                 case opc_lxor:

   597                     emit(out, "@1 ^= @2;", smapper.getL(1), smapper.popL());

   598                     break;

   599                 case opc_ineg:

   600                     emit(out, "@1 = -@1;", smapper.getI(0));

   601                     break;

   602                 case opc_lneg:

   603                     emit(out, "@1 = -@1;", smapper.getL(0));

   604                     break;

   605                 case opc_fneg:

   606                     emit(out, "@1 = -@1;", smapper.getF(0));

   607                     break;

   608                 case opc_dneg:

   609                     emit(out, "@1 = -@1;", smapper.getD(0));

   610                     break;

   611                 case opc_ishl:

   612                     emit(out, "@1 <<= @2;", smapper.getI(1), smapper.popI());

   613                     break;

   614                 case opc_lshl:

   615                     emit(out, "@1 <<= @2;", smapper.getL(1), smapper.popI());

   616                     break;

   617                 case opc_ishr:

   618                     emit(out, "@1 >>= @2;", smapper.getI(1), smapper.popI());

   619                     break;

   620                 case opc_lshr:

   621                     emit(out, "@1 >>= @2;", smapper.getL(1), smapper.popI());

   622                     break;

   623                 case opc_iushr:

   624                     emit(out, "@1 >>>= @2;", smapper.getI(1), smapper.popI());

   625                     break;

   626                 case opc_lushr:

   627                     emit(out, "@1 >>>= @2;", smapper.getL(1), smapper.popI());

   628                     break;

   629                 case opc_iinc: {

   630                     ++i;

   631                     final int varIndx = wide ? readUShort(byteCodes, i++)

   632                                              : readUByte(byteCodes, i);

   633                     ++i;

   634                     final int incrBy = wide ? readIntArg(byteCodes, i++)

   635                                             : byteCodes[i];

   636                     wide = false;

   637                     if (incrBy == 1) {

   638                         emit(out, "@1++;", lmapper.getI(varIndx));

   639                     } else {

   640                         emit(out, "@1 += @2;",

   641                              lmapper.getI(varIndx),

   642                              Integer.toString(incrBy));

   643                     }

   644                     break;

   645                 }

   646                 case opc_return:

   647                     emit(out, "return;");

   648                     break;

   649                 case opc_ireturn:

   650                     emit(out, "return @1;", smapper.popI());

   651                     break;

   652                 case opc_lreturn:

   653                     emit(out, "return @1;", smapper.popL());

   654                     break;

   655                 case opc_freturn:

   656                     emit(out, "return @1;", smapper.popF());

   657                     break;

   658                 case opc_dreturn:

   659                     emit(out, "return @1;", smapper.popD());

   660                     break;

   661                 case opc_areturn:

   662                     emit(out, "return @1;", smapper.popA());

   663                     break;

   664                 case opc_i2l:

   665                     emit(out, "var @2 = @1;", smapper.popI(), smapper.pushL());

   666                     break;

   667                 case opc_i2f:

   668                     emit(out, "var @2 = @1;", smapper.popI(), smapper.pushF());

   669                     break;

   670                 case opc_i2d:

   671                     emit(out, "var @2 = @1;", smapper.popI(), smapper.pushD());

   672                     break;

   673                 case opc_l2i:

   674                     emit(out, "var @2 = @1;", smapper.popL(), smapper.pushI());

   675                     break;

   676                     // max int check?

   677                 case opc_l2f:

   678                     emit(out, "var @2 = @1;", smapper.popL(), smapper.pushF());

   679                     break;

   680                 case opc_l2d:

   681                     emit(out, "var @2 = @1;", smapper.popL(), smapper.pushD());

   682                     break;

   683                 case opc_f2d:

   684                     emit(out, "var @2 = @1;", smapper.popF(), smapper.pushD());

   685                     break;

   686                 case opc_d2f:

   687                     emit(out, "var @2 = @1;", smapper.popD(), smapper.pushF());

   688                     break;

   689                 case opc_f2i:

   690                     emit(out, "var @2 = Math.floor(@1);",

   691                          smapper.popF(), smapper.pushI());

   692                     break;

   693                 case opc_f2l:

   694                     emit(out, "var @2 = Math.floor(@1);",

   695                          smapper.popF(), smapper.pushL());

   696                     break;

   697                 case opc_d2i:

   698                     emit(out, "var @2 = Math.floor(@1);",

   699                          smapper.popD(), smapper.pushI());

   700                     break;

   701                 case opc_d2l:

   702                     emit(out, "var @2 = Math.floor(@1);",

   703                          smapper.popD(), smapper.pushL());

   704                     break;

   705                 case opc_i2b:

   706                     emit(out, "var @1 = @1.toInt8();", smapper.getI(0));

   707                     break;

   708                 case opc_i2c:

   709                     out.append("{ /* number conversion */ }");

   710                     break;

   711                 case opc_i2s:

   712                     emit(out, "var @1 = @1.toInt16();", smapper.getI(0));

   713                     break;

   714                 case opc_aconst_null:

   715                     emit(out, "var @1 = null;", smapper.pushA());

   716                     break;

   717                 case opc_iconst_m1:

   718                     emit(out, "var @1 = -1;", smapper.pushI());

   719                     break;

   720                 case opc_iconst_0:

   721                     emit(out, "var @1 = 0;", smapper.pushI());

   722                     break;

   723                 case opc_dconst_0:

   724                     emit(out, "var @1 = 0;", smapper.pushD());

   725                     break;

   726                 case opc_lconst_0:

   727                     emit(out, "var @1 = 0;", smapper.pushL());

   728                     break;

   729                 case opc_fconst_0:

   730                     emit(out, "var @1 = 0;", smapper.pushF());

   731                     break;

   732                 case opc_iconst_1:

   733                     emit(out, "var @1 = 1;", smapper.pushI());

   734                     break;

   735                 case opc_lconst_1:

   736                     emit(out, "var @1 = 1;", smapper.pushL());

   737                     break;

   738                 case opc_fconst_1:

   739                     emit(out, "var @1 = 1;", smapper.pushF());

   740                     break;

   741                 case opc_dconst_1:

   742                     emit(out, "var @1 = 1;", smapper.pushD());

   743                     break;

   744                 case opc_iconst_2:

   745                     emit(out, "var @1 = 2;", smapper.pushI());

   746                     break;

   747                 case opc_fconst_2:

   748                     emit(out, "var @1 = 2;", smapper.pushF());

   749                     break;

   750                 case opc_iconst_3:

   751                     emit(out, "var @1 = 3;", smapper.pushI());

   752                     break;

   753                 case opc_iconst_4:

   754                     emit(out, "var @1 = 4;", smapper.pushI());

   755                     break;

   756                 case opc_iconst_5:

   757                     emit(out, "var @1 = 5;", smapper.pushI());

   758                     break;

   759                 case opc_ldc: {

   760                     int indx = readUByte(byteCodes, ++i);

   761                     String v = encodeConstant(indx);

   762                     int type = VarType.fromConstantType(jc.getTag(indx));

   763                     emit(out, "var @1 = @2;", smapper.pushT(type), v);

   764                     break;

   765                 }

   766                 case opc_ldc_w:

   767                 case opc_ldc2_w: {

   768                     int indx = readIntArg(byteCodes, i);

   769                     i += 2;

   770                     String v = encodeConstant(indx);

   771                     int type = VarType.fromConstantType(jc.getTag(indx));

   772                     emit(out, "var @1 = @2;", smapper.pushT(type), v);

   773                     break;

   774                 }

   775                 case opc_lcmp:

   776                     emit(out, "var @3 = (@2 == @1) ? 0 : ((@2 < @1) ? -1 : 1);",

   777                          smapper.popL(), smapper.popL(), smapper.pushI());

   778                     break;

   779                 case opc_fcmpl:

   780                 case opc_fcmpg:

   781                     emit(out, "var @3 = (@2 == @1) ? 0 : ((@2 < @1) ? -1 : 1);",

   782                          smapper.popF(), smapper.popF(), smapper.pushI());

   783                     break;

   784                 case opc_dcmpl:

   785                 case opc_dcmpg:

   786                     emit(out, "var @3 = (@2 == @1) ? 0 : ((@2 < @1) ? -1 : 1);",

   787                          smapper.popD(), smapper.popD(), smapper.pushI());

   788                     break;

   789                 case opc_if_acmpeq:

   790                     i = generateIf(byteCodes, i, smapper.popA(), smapper.popA(),

   791                                    "===");

   792                     break;

   793                 case opc_if_acmpne:

   794                     i = generateIf(byteCodes, i, smapper.popA(), smapper.popA(),

   795                                    "!=");

   796                     break;

   797                 case opc_if_icmpeq:

   798                     i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),

   799                                    "==");

   800                     break;

   801                 case opc_ifeq: {

   802                     int indx = i + readIntArg(byteCodes, i);

   803                     emit(out, "if (@1 == 0) { gt = @2; continue; }",

   804                          smapper.popI(), Integer.toString(indx));

   805                     i += 2;

   806                     break;

   807                 }

   808                 case opc_ifne: {

   809                     int indx = i + readIntArg(byteCodes, i);

   810                     emit(out, "if (@1 != 0) { gt = @2; continue; }",

   811                          smapper.popI(), Integer.toString(indx));

   812                     i += 2;

   813                     break;

   814                 }

   815                 case opc_iflt: {

   816                     int indx = i + readIntArg(byteCodes, i);

   817                     emit(out, "if (@1 < 0) { gt = @2; continue; }",

   818                          smapper.popI(), Integer.toString(indx));

   819                     i += 2;

   820                     break;

   821                 }

   822                 case opc_ifle: {

   823                     int indx = i + readIntArg(byteCodes, i);

   824                     emit(out, "if (@1 <= 0) { gt = @2; continue; }",

   825                          smapper.popI(), Integer.toString(indx));

   826                     i += 2;

   827                     break;

   828                 }

   829                 case opc_ifgt: {

   830                     int indx = i + readIntArg(byteCodes, i);

   831                     emit(out, "if (@1 > 0) { gt = @2; continue; }",

   832                          smapper.popI(), Integer.toString(indx));

   833                     i += 2;

   834                     break;

   835                 }

   836                 case opc_ifge: {

   837                     int indx = i + readIntArg(byteCodes, i);

   838                     emit(out, "if (@1 >= 0) { gt = @2; continue; }",

   839                          smapper.popI(), Integer.toString(indx));

   840                     i += 2;

   841                     break;

   842                 }

   843                 case opc_ifnonnull: {

   844                     int indx = i + readIntArg(byteCodes, i);

   845                     emit(out, "if (@1 !== null) { gt = @2; continue; }",

   846                          smapper.popA(), Integer.toString(indx));

   847                     i += 2;

   848                     break;

   849                 }

   850                 case opc_ifnull: {

   851                     int indx = i + readIntArg(byteCodes, i);

   852                     emit(out, "if (@1 === null) { gt = @2; continue; }",

   853                          smapper.popA(), Integer.toString(indx));

   854                     i += 2;

   855                     break;

   856                 }

   857                 case opc_if_icmpne:

   858                     i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),

   859                                    "!=");

   860                     break;

   861                 case opc_if_icmplt:

   862                     i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),

   863                                    "<");

   864                     break;

   865                 case opc_if_icmple:

   866                     i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),

   867                                    "<=");

   868                     break;

   869                 case opc_if_icmpgt:

   870                     i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),

   871                                    ">");

   872                     break;

   873                 case opc_if_icmpge:

   874                     i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),

   875                                    ">=");

   876                     break;

   877                 case opc_goto: {

   878                     int indx = i + readIntArg(byteCodes, i);

   879                     emit(out, "gt = @1; continue;", Integer.toString(indx));

   880                     i += 2;

   881                     break;

   882                 }

   883                 case opc_lookupswitch: {

   884                     int table = i / 4 * 4 + 4;

   885                     int dflt = i + readInt4(byteCodes, table);

   886                     table += 4;

   887                     int n = readInt4(byteCodes, table);

   888                     table += 4;

   889                     out.append("switch (").append(smapper.popI()).append(") {\n");

   890                     while (n-- > 0) {

   891                         int cnstnt = readInt4(byteCodes, table);

   892                         table += 4;

   893                         int offset = i + readInt4(byteCodes, table);

   894                         table += 4;

   895                         out.append("  case " + cnstnt).append(": gt = " + offset).append("; continue;\n");

   896                     }

   897                     out.append("  default: gt = " + dflt).append("; continue;\n}");

   898                     i = table - 1;

   899                     break;

   900                 }

   901                 case opc_tableswitch: {

   902                     int table = i / 4 * 4 + 4;

   903                     int dflt = i + readInt4(byteCodes, table);

   904                     table += 4;

   905                     int low = readInt4(byteCodes, table);

   906                     table += 4;

   907                     int high = readInt4(byteCodes, table);

   908                     table += 4;

   909                     out.append("switch (").append(smapper.popI()).append(") {\n");

   910                     while (low <= high) {

   911                         int offset = i + readInt4(byteCodes, table);

   912                         table += 4;

   913                         out.append("  case " + low).append(": gt = " + offset).append("; continue;\n");

   914                         low++;

   915                     }

   916                     out.append("  default: gt = " + dflt).append("; continue;\n}");

   917                     i = table - 1;

   918                     break;

   919                 }

   920                 case opc_invokeinterface: {

   921                     i = invokeVirtualMethod(byteCodes, i, smapper) + 2;

   922                     break;

   923                 }

   924                 case opc_invokevirtual:

   925                     i = invokeVirtualMethod(byteCodes, i, smapper);

   926                     break;

   927                 case opc_invokespecial:

   928                     i = invokeStaticMethod(byteCodes, i, smapper, false);

   929                     break;

   930                 case opc_invokestatic:

   931                     i = invokeStaticMethod(byteCodes, i, smapper, true);

   932                     break;

   933                 case opc_new: {

   934                     int indx = readIntArg(byteCodes, i);

   935                     String ci = jc.getClassName(indx);

   936                     emit(out, "var @1 = new @2;",

   937                          smapper.pushA(), accessClass(ci.replace('/', '_')));

   938                     addReference(ci);

   939                     i += 2;

   940                     break;

   941                 }

   942                 case opc_newarray:

   943                     int atype = readUByte(byteCodes, ++i);

   944                     String jvmType;

   945                     switch (atype) {

   946                         case 4: jvmType = "[Z"; break;

   947                         case 5: jvmType = "[C"; break;

   948                         case 6: jvmType = "[F"; break;

   949                         case 7: jvmType = "[D"; break;

   950                         case 8: jvmType = "[B"; break;

   951                         case 9: jvmType = "[S"; break;

   952                         case 10: jvmType = "[I"; break;

   953                         case 11: jvmType = "[J"; break;

   954                         default: throw new IllegalStateException("Array type: " + atype);

   955                     }

   956                     emit(out, "var @2 = Array.prototype.newArray__Ljava_lang_Object_2ZLjava_lang_String_2I(true, '@3', @1);",

   957                          smapper.popI(), smapper.pushA(), jvmType);

   958                     break;

   959                 case opc_anewarray: {

   960                     int type = readIntArg(byteCodes, i);

   961                     i += 2;

   962                     String typeName = jc.getClassName(type);

   963                     if (typeName.startsWith("[")) {

   964                         typeName = "[" + typeName;

   965                     } else {

   966                         typeName = "[L" + typeName + ";";

   967                     }

   968                     emit(out, "var @2 = Array.prototype.newArray__Ljava_lang_Object_2ZLjava_lang_String_2I(false, '@3', @1);",

   969                          smapper.popI(), smapper.pushA(), typeName);

   970                     break;

   971                 }

   972                 case opc_multianewarray: {

   973                     int type = readIntArg(byteCodes, i);

   974                     i += 2;

   975                     String typeName = jc.getClassName(type);

   976                     int dim = readUByte(byteCodes, ++i);

   977                     StringBuilder dims = new StringBuilder();

   978                     dims.append('[');

   979                     for (int d = 0; d < dim; d++) {

   980                         if (d != 0) {

   981                             dims.append(",");

   982                         }

   983                         dims.append(smapper.popI());

   984                     }

   985                     dims.append(']');

   986                     emit(out, "var @2 = Array.prototype.multiNewArray__Ljava_lang_Object_2Ljava_lang_String_2_3II('@3', @1, 0);",

   987                          dims.toString(), smapper.pushA(), typeName);

   988                     break;

   989                 }

   990                 case opc_arraylength:

   991                     emit(out, "var @2 = @1.length;",

   992                          smapper.popA(), smapper.pushI());

   993                     break;

   994                 case opc_lastore:

   995                     emit(out, "@3.at(@2, @1);",

   996                          smapper.popL(), smapper.popI(), smapper.popA());

   997                     break;

   998                 case opc_fastore:

   999                     emit(out, "@3.at(@2, @1);",

  1000                          smapper.popF(), smapper.popI(), smapper.popA());

  1001                     break;

  1002                 case opc_dastore:

  1003                     emit(out, "@3.at(@2, @1);",

  1004                          smapper.popD(), smapper.popI(), smapper.popA());

  1005                     break;

  1006                 case opc_aastore:

  1007                     emit(out, "@3.at(@2, @1);",

  1008                          smapper.popA(), smapper.popI(), smapper.popA());

  1009                     break;

  1010                 case opc_iastore:

  1011                 case opc_bastore:

  1012                 case opc_castore:

  1013                 case opc_sastore:

  1014                     emit(out, "@3.at(@2, @1);",

  1015                          smapper.popI(), smapper.popI(), smapper.popA());

  1016                     break;

  1017                 case opc_laload:

  1018                     emit(out, "var @3 = @2.at(@1);",

  1019                          smapper.popI(), smapper.popA(), smapper.pushL());

  1020                     break;

  1021                 case opc_faload:

  1022                     emit(out, "var @3 = @2.at(@1);",

  1023                          smapper.popI(), smapper.popA(), smapper.pushF());

  1024                     break;

  1025                 case opc_daload:

  1026                     emit(out, "var @3 = @2.at(@1);",

  1027                          smapper.popI(), smapper.popA(), smapper.pushD());

  1028                     break;

  1029                 case opc_aaload:

  1030                     emit(out, "var @3 = @2.at(@1);",

  1031                          smapper.popI(), smapper.popA(), smapper.pushA());

  1032                     break;

  1033                 case opc_iaload:

  1034                 case opc_baload:

  1035                 case opc_caload:

  1036                 case opc_saload:

  1037                     emit(out, "var @3 = @2.at(@1);",

  1038                          smapper.popI(), smapper.popA(), smapper.pushI());

  1039                     break;

  1040                 case opc_pop:

  1041                 case opc_pop2:

  1042                     smapper.pop(1);

  1043                     debug("/* pop */");

  1044                     break;

  1045                 case opc_dup: {

  1046                     final Variable v = smapper.get(0);

  1047                     emit(out, "var @1 = @2;", smapper.pushT(v.getType()), v);

  1048                     break;

  1049                 }

  1050                 case opc_dup2: {

  1051                     final Variable vi1 = smapper.get(0);

  1053                     if (vi1.isCategory2()) {

  1054                         emit(out, "var @1 = @2;",

  1055                              smapper.pushT(vi1.getType()), vi1);

  1056                     } else {

  1057                         final Variable vi2 = smapper.get(1);

  1058                         emit(out, "var @1 = @2, @3 = @4;",

  1059                              smapper.pushT(vi2.getType()), vi2,

  1060                              smapper.pushT(vi1.getType()), vi1);

  1061                     }

  1062                     break;

  1063                 }

  1064                 case opc_dup_x1: {

  1065                     final Variable vi1 = smapper.pop();

  1066                     final Variable vi2 = smapper.pop();

  1067                     final Variable vo3 = smapper.pushT(vi1.getType());

  1068                     final Variable vo2 = smapper.pushT(vi2.getType());

  1069                     final Variable vo1 = smapper.pushT(vi1.getType());

  1071                     emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1072                          vo1, vi1, vo2, vi2, vo3, vo1);

  1073                     break;

  1074                 }

  1075                 case opc_dup2_x1: {

  1076                     final Variable vi1 = smapper.pop();

  1077                     final Variable vi2 = smapper.pop();

  1079                     if (vi1.isCategory2()) {

  1080                         final Variable vo3 = smapper.pushT(vi1.getType());

  1081                         final Variable vo2 = smapper.pushT(vi2.getType());

  1082                         final Variable vo1 = smapper.pushT(vi1.getType());

  1084                         emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1085                              vo1, vi1, vo2, vi2, vo3, vo1);

  1086                     } else {

  1087                         final Variable vi3 = smapper.pop();

  1088                         final Variable vo5 = smapper.pushT(vi2.getType());

  1089                         final Variable vo4 = smapper.pushT(vi1.getType());

  1090                         final Variable vo3 = smapper.pushT(vi3.getType());

  1091                         final Variable vo2 = smapper.pushT(vi2.getType());

  1092                         final Variable vo1 = smapper.pushT(vi1.getType());

  1094                         emit(out, "var @1 = @2, @3 = @4, @5 = @6,",

  1095                              vo1, vi1, vo2, vi2, vo3, vi3);

  1096                         emit(out, " @1 = @2, @3 = @4;",

  1097                              vo4, vo1, vo5, vo2);

  1098                     }

  1099                     break;

  1100                 }

  1101                 case opc_dup_x2: {

  1102                     final Variable vi1 = smapper.pop();

  1103                     final Variable vi2 = smapper.pop();

  1105                     if (vi2.isCategory2()) {

  1106                         final Variable vo3 = smapper.pushT(vi1.getType());

  1107                         final Variable vo2 = smapper.pushT(vi2.getType());

  1108                         final Variable vo1 = smapper.pushT(vi1.getType());

  1110                         emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1111                              vo1, vi1, vo2, vi2, vo3, vo1);

  1112                     } else {

  1113                         final Variable vi3 = smapper.pop();

  1114                         final Variable vo4 = smapper.pushT(vi1.getType());

  1115                         final Variable vo3 = smapper.pushT(vi3.getType());

  1116                         final Variable vo2 = smapper.pushT(vi2.getType());

  1117                         final Variable vo1 = smapper.pushT(vi1.getType());

  1119                         emit(out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8;",

  1120                              vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);

  1121                     }

  1122                     break;

  1123                 }

  1124                 case opc_dup2_x2: {

  1125                     final Variable vi1 = smapper.pop();

  1126                     final Variable vi2 = smapper.pop();

  1128                     if (vi1.isCategory2()) {

  1129                         if (vi2.isCategory2()) {

  1130                             final Variable vo3 = smapper.pushT(vi1.getType());

  1131                             final Variable vo2 = smapper.pushT(vi2.getType());

  1132                             final Variable vo1 = smapper.pushT(vi1.getType());

  1134                             emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1135                                  vo1, vi1, vo2, vi2, vo3, vo1);

  1136                         } else {

  1137                             final Variable vi3 = smapper.pop();

  1138                             final Variable vo4 = smapper.pushT(vi1.getType());

  1139                             final Variable vo3 = smapper.pushT(vi3.getType());

  1140                             final Variable vo2 = smapper.pushT(vi2.getType());

  1141                             final Variable vo1 = smapper.pushT(vi1.getType());

  1143                             emit(out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8;",

  1144                                  vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);

  1145                         }

  1146                     } else {

  1147                         final Variable vi3 = smapper.pop();

  1149                         if (vi3.isCategory2()) {

  1150                             final Variable vo5 = smapper.pushT(vi2.getType());

  1151                             final Variable vo4 = smapper.pushT(vi1.getType());

  1152                             final Variable vo3 = smapper.pushT(vi3.getType());

  1153                             final Variable vo2 = smapper.pushT(vi2.getType());

  1154                             final Variable vo1 = smapper.pushT(vi1.getType());

  1156                             emit(out, "var @1 = @2, @3 = @4, @5 = @6,",

  1157                                  vo1, vi1, vo2, vi2, vo3, vi3);

  1158                             emit(out, " @1 = @2, @3 = @4;",

  1159                                  vo4, vo1, vo5, vo2);

  1160                         } else {

  1161                             final Variable vi4 = smapper.pop();

  1162                             final Variable vo6 = smapper.pushT(vi2.getType());

  1163                             final Variable vo5 = smapper.pushT(vi1.getType());

  1164                             final Variable vo4 = smapper.pushT(vi4.getType());

  1165                             final Variable vo3 = smapper.pushT(vi3.getType());

  1166                             final Variable vo2 = smapper.pushT(vi2.getType());

  1167                             final Variable vo1 = smapper.pushT(vi1.getType());

  1169                             emit(out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8,",

  1170                                  vo1, vi1, vo2, vi2, vo3, vi3, vo4, vi4);

  1171                             emit(out, " @1 = @2, @3 = @4;",

  1172                                  vo5, vo1, vo6, vo2);

  1173                         }

  1174                     }

  1175                     break;

  1176                 }

  1177                 case opc_swap: {

  1178                     final Variable vi1 = smapper.get(0);

  1179                     final Variable vi2 = smapper.get(1);

  1181                     if (vi1.getType() == vi2.getType()) {

  1182                         final Variable tmp = smapper.pushT(vi1.getType());

  1184                         emit(out, "var @1 = @2, @2 = @3, @3 = @1;",

  1185                              tmp, vi1, vi2);

  1186                         smapper.pop(1);

  1187                     } else {

  1188                         smapper.pop(2);

  1189                         smapper.pushT(vi1.getType());

  1190                         smapper.pushT(vi2.getType());

  1191                     }

  1192                     break;

  1193                 }

  1194                 case opc_bipush:

  1195                     emit(out, "var @1 = @2;",

  1196                          smapper.pushI(), Integer.toString(byteCodes[++i]));

  1197                     break;

  1198                 case opc_sipush:

  1199                     emit(out, "var @1 = @2;",

  1200                          smapper.pushI(),

  1201                          Integer.toString(readIntArg(byteCodes, i)));

  1202                     i += 2;

  1203                     break;

  1204                 case opc_getfield: {

  1205                     int indx = readIntArg(byteCodes, i);

  1206                     String[] fi = jc.getFieldInfoName(indx);

  1207                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1208                     final String mangleClass = mangleSig(fi[0]);

  1209                     final String mangleClassAccess = accessClass(mangleClass);

  1210                     emit(out, "var @2 = @4(false)._@3.call(@1);",

  1211                          smapper.popA(),

  1212                          smapper.pushT(type), fi[1], mangleClassAccess

  1213                     );

  1214                     i += 2;

  1215                     break;

  1216                 }

  1217                 case opc_putfield: {

  1218                     int indx = readIntArg(byteCodes, i);

  1219                     String[] fi = jc.getFieldInfoName(indx);

  1220                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1221                     final String mangleClass = mangleSig(fi[0]);

  1222                     final String mangleClassAccess = accessClass(mangleClass);

  1223                     emit(out, "@4(false)._@3.call(@2, @1);",

  1224                          smapper.popT(type),

  1225                          smapper.popA(), fi[1],

  1226                          mangleClassAccess

  1227                     );

  1228                     i += 2;

  1229                     break;

  1230                 }

  1231                 case opc_getstatic: {

  1232                     int indx = readIntArg(byteCodes, i);

  1233                     String[] fi = jc.getFieldInfoName(indx);

  1234                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1235                     emit(out, "var @1 = @2(false).constructor.@3;",

  1236                          smapper.pushT(type),

  1237                          accessClass(fi[0].replace('/', '_')), fi[1]);

  1238                     i += 2;

  1239                     addReference(fi[0]);

  1240                     break;

  1241                 }

  1242                 case opc_putstatic: {

  1243                     int indx = readIntArg(byteCodes, i);

  1244                     String[] fi = jc.getFieldInfoName(indx);

  1245                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1246                     emit(out, "@1(false).constructor.@2 = @3;",

  1247                          accessClass(fi[0].replace('/', '_')), fi[1],

  1248                          smapper.popT(type));

  1249                     i += 2;

  1250                     addReference(fi[0]);

  1251                     break;

  1252                 }

  1253                 case opc_checkcast: {

  1254                     int indx = readIntArg(byteCodes, i);

  1255                     final String type = jc.getClassName(indx);

  1256                     if (!type.startsWith("[")) {

  1257                         emit(out,

  1258                              "if (@1 !== null && !@1.$instOf_@2) throw {};",

  1259                              smapper.getA(0), type.replace('/', '_'));

  1260                     } else {

  1261                         emit(out, "vm.java_lang_Class(false).forName__Ljava_lang_Class_2Ljava_lang_String_2('@2').cast__Ljava_lang_Object_2Ljava_lang_Object_2(@1);",

  1262                              smapper.getA(0), type

  1263                         );

  1264                     }

  1265                     i += 2;

  1266                     break;

  1267                 }

  1268                 case opc_instanceof: {

  1269                     int indx = readIntArg(byteCodes, i);

  1270                     final String type = jc.getClassName(indx);

  1271                     if (!type.startsWith("[")) {

  1272                         emit(out, "var @2 = @1.$instOf_@3 ? 1 : 0;",

  1273                              smapper.popA(), smapper.pushI(),

  1274                              type.replace('/', '_'));

  1275                     } else {

  1276                         emit(out, "var @2 = vm.java_lang_Class(false).forName__Ljava_lang_Class_2Ljava_lang_String_2('@3').isInstance__ZLjava_lang_Object_2(@1);",

  1277                             smapper.popA(), smapper.pushI(),

  1278                             type

  1279                         );

  1280                     }

  1281                     i += 2;

  1282                     break;

  1283                 }

  1284                 case opc_athrow: {

  1285                     final Variable v = smapper.popA();

  1286                     smapper.clear();

  1288                     emit(out, "{ var @1 = @2; throw @2; }",

  1289                          smapper.pushA(), v);

  1290                     break;

  1291                 }

  1293                 case opc_monitorenter: {

  1294                     out.append("/* monitor enter */");

  1295                     smapper.popA();

  1296                     break;

  1297                 }

  1299                 case opc_monitorexit: {

  1300                     out.append("/* monitor exit */");

  1301                     smapper.popA();

  1302                     break;

  1303                 }

  1305                 case opc_wide:

  1306                     wide = true;

  1307                     break;

  1309                 default: {

  1310                     wide = false;

  1311                     emit(out, "throw 'unknown bytecode @1';",

  1312                          Integer.toString(c));

  1313                 }

  1314             }

  1315             if (debug(" //")) {

  1316                 for (int j = prev; j <= i; j++) {

  1317                     out.append(" ");

  1318                     final int cc = readUByte(byteCodes, j);

  1319                     out.append(Integer.toString(cc));

  1320                 }

  1321             }

  1322             out.append("\n");

  1323         }

  1324         if (previousTrap != null) {

  1325             generateCatch(previousTrap);

  1326         }

  1327         out.append("  }\n");

  1328         out.append("};");

  1329     }

  1331     private int generateIf(byte[] byteCodes, int i,

  1332                            final Variable v2, final Variable v1,

  1333                            final String test) throws IOException {

  1334         int indx = i + readIntArg(byteCodes, i);

  1335         out.append("if (").append(v1)

  1336            .append(' ').append(test).append(' ')

  1337            .append(v2).append(") { gt = " + indx)

  1338            .append("; continue; }");

  1339         return i + 2;

  1340     }

  1342     private int readIntArg(byte[] byteCodes, int offsetInstruction) {

  1343         final int indxHi = byteCodes[offsetInstruction + 1] << 8;

  1344         final int indxLo = byteCodes[offsetInstruction + 2];

  1345         return (indxHi & 0xffffff00) | (indxLo & 0xff);

  1346     }

  1347     private int readInt4(byte[] byteCodes, int offsetInstruction) {

  1348         final int d = byteCodes[offsetInstruction + 0] << 24;

  1349         final int c = byteCodes[offsetInstruction + 1] << 16;

  1350         final int b = byteCodes[offsetInstruction + 2] << 8;

  1351         final int a = byteCodes[offsetInstruction + 3];

  1352         return (d & 0xff000000) | (c & 0xff0000) | (b & 0xff00) | (a & 0xff);

  1353     }

  1354     private int readUByte(byte[] byteCodes, int offsetInstruction) {

  1355         return byteCodes[offsetInstruction] & 0xff;

  1356     }

  1358     private int readUShort(byte[] byteCodes, int offsetInstruction) {

  1359         return ((byteCodes[offsetInstruction] & 0xff) << 8)

  1360                     | (byteCodes[offsetInstruction + 1] & 0xff);

  1361     }

  1363     private static void countArgs(String descriptor, char[] returnType, StringBuilder sig, StringBuilder cnt) {

  1364         int i = 0;

  1365         Boolean count = null;

  1366         boolean array = false;

  1367         sig.append("__");

  1368         int firstPos = sig.length();

  1369         while (i < descriptor.length()) {

  1370             char ch = descriptor.charAt(i++);

  1371             switch (ch) {

  1372                 case '(':

  1373                     count = true;

  1374                     continue;

  1375                 case ')':

  1376                     count = false;

  1377                     continue;

  1378                 case 'B':

  1379                 case 'C':

  1380                 case 'D':

  1381                 case 'F':

  1382                 case 'I':

  1383                 case 'J':

  1384                 case 'S':

  1385                 case 'Z':

  1386                     if (count) {

  1387                         if (array) {

  1388                             sig.append("_3");

  1389                         }

  1390                         sig.append(ch);

  1391                         if (ch == 'J' || ch == 'D') {

  1392                             cnt.append('1');

  1393                         } else {

  1394                             cnt.append('0');

  1395                         }

  1396                     } else {

  1397                         sig.insert(firstPos, ch);

  1398                         if (array) {

  1399                             returnType[0] = '[';

  1400                             sig.insert(firstPos, "_3");

  1401                         } else {

  1402                             returnType[0] = ch;

  1403                         }

  1404                     }

  1405                     array = false;

  1406                     continue;

  1407                 case 'V':

  1408                     assert !count;

  1409                     returnType[0] = 'V';

  1410                     sig.insert(firstPos, 'V');

  1411                     continue;

  1412                 case 'L':

  1413                     int next = descriptor.indexOf(';', i);

  1414                     String realSig = mangleSig(descriptor, i - 1, next + 1);

  1415                     if (count) {

  1416                         if (array) {

  1417                             sig.append("_3");

  1418                         }

  1419                         sig.append(realSig);

  1420                         cnt.append('0');

  1421                     } else {

  1422                         sig.insert(firstPos, realSig);

  1423                         if (array) {

  1424                             sig.insert(firstPos, "_3");

  1425                         }

  1426                         returnType[0] = 'L';

  1427                     }

  1428                     i = next + 1;

  1429                     array = false;

  1430                     continue;

  1431                 case '[':

  1432                     array = true;

  1433                     continue;

  1434                 default:

  1435                     throw new IllegalStateException("Invalid char: " + ch);

  1436             }

  1437         }

  1438     }

  1440     static String mangleSig(String sig) {

  1441         return mangleSig(sig, 0, sig.length());

  1442     }

  1444     private static String mangleSig(String txt, int first, int last) {

  1445         StringBuilder sb = new StringBuilder();

  1446         for (int i = first; i < last; i++) {

  1447             final char ch = txt.charAt(i);

  1448             switch (ch) {

  1449                 case '/': sb.append('_'); break;

  1450                 case '_': sb.append("_1"); break;

  1451                 case ';': sb.append("_2"); break;

  1452                 case '[': sb.append("_3"); break;

  1453                 default: sb.append(ch); break;

  1454             }

  1455         }

  1456         return sb.toString();

  1457     }

  1459     private static String findMethodName(MethodData m, StringBuilder cnt) {

  1460         StringBuilder name = new StringBuilder();

  1461         if ("<init>".equals(m.getName())) { // NOI18N

  1462             name.append("cons"); // NOI18N

  1463         } else if ("<clinit>".equals(m.getName())) { // NOI18N

  1464             name.append("class"); // NOI18N

  1465         } else {

  1466             name.append(m.getName());

  1467         }

  1469         countArgs(m.getInternalSig(), new char[1], name, cnt);

  1470         return name.toString();

  1471     }

  1473     static String findMethodName(String[] mi, StringBuilder cnt, char[] returnType) {

  1474         StringBuilder name = new StringBuilder();

  1475         String descr = mi[2];//mi.getDescriptor();

  1476         String nm= mi[1];

  1477         if ("<init>".equals(nm)) { // NOI18N

  1478             name.append("cons"); // NOI18N

  1479         } else {

  1480             name.append(nm);

  1481         }

  1482         countArgs(descr, returnType, name, cnt);

  1483         return name.toString();

  1484     }

  1486     private int invokeStaticMethod(byte[] byteCodes, int i, final StackMapper mapper, boolean isStatic)

  1487     throws IOException {

  1488         int methodIndex = readIntArg(byteCodes, i);

  1489         String[] mi = jc.getFieldInfoName(methodIndex);

  1490         char[] returnType = { 'V' };

  1491         StringBuilder cnt = new StringBuilder();

  1492         String mn = findMethodName(mi, cnt, returnType);

  1494         final int numArguments = isStatic ? cnt.length() : cnt.length() + 1;

  1495         final Variable[] vars = new Variable[numArguments];

  1497         for (int j = numArguments - 1; j >= 0; --j) {

  1498             vars[j] = mapper.pop();

  1499         }

  1501         if (returnType[0] != 'V') {

  1502             out.append("var ")

  1503                .append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1504                .append(" = ");

  1505         }

  1507         final String in = mi[0];

  1508         out.append(accessClass(in.replace('/', '_')));

  1509         out.append("(false).");

  1510         if (mn.startsWith("cons_")) {

  1511             out.append("constructor.");

  1512         }

  1513         out.append(mn);

  1514         if (isStatic) {

  1515             out.append('(');

  1516         } else {

  1517             out.append(".call(");

  1518         }

  1519         if (numArguments > 0) {

  1520             out.append(vars[0]);

  1521             for (int j = 1; j < numArguments; ++j) {

  1522                 out.append(", ");

  1523                 out.append(vars[j]);

  1524             }

  1525         }

  1526         out.append(");");

  1527         i += 2;

  1528         addReference(in);

  1529         return i;

  1530     }

  1531     private int invokeVirtualMethod(byte[] byteCodes, int i, final StackMapper mapper)

  1532     throws IOException {

  1533         int methodIndex = readIntArg(byteCodes, i);

  1534         String[] mi = jc.getFieldInfoName(methodIndex);

  1535         char[] returnType = { 'V' };

  1536         StringBuilder cnt = new StringBuilder();

  1537         String mn = findMethodName(mi, cnt, returnType);

  1539         final int numArguments = cnt.length() + 1;

  1540         final Variable[] vars = new Variable[numArguments];

  1542         for (int j = numArguments - 1; j >= 0; --j) {

  1543             vars[j] = mapper.pop();

  1544         }

  1546         if (returnType[0] != 'V') {

  1547             out.append("var ")

  1548                .append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1549                .append(" = ");

  1550         }

  1552         out.append(vars[0]).append('.');

  1553         out.append(mn);

  1554         out.append('(');

  1555         String sep = "";

  1556         for (int j = 1; j < numArguments; ++j) {

  1557             out.append(sep);

  1558             out.append(vars[j]);

  1559             sep = ", ";

  1560         }

  1561         out.append(");");

  1562         i += 2;

  1563         return i;

  1564     }

  1566     private void addReference(String cn) throws IOException {

  1567         if (requireReference(cn)) {

  1568             debug(" /* needs " + cn + " */");

  1569         }

  1570     }

  1572     private void outType(String d, StringBuilder out) {

  1573         int arr = 0;

  1574         while (d.charAt(0) == '[') {

  1575             out.append('A');

  1576             d = d.substring(1);

  1577         }

  1578         if (d.charAt(0) == 'L') {

  1579             assert d.charAt(d.length() - 1) == ';';

  1580             out.append(d.replace('/', '_').substring(0, d.length() - 1));

  1581         } else {

  1582             out.append(d);

  1583         }

  1584     }

  1586     private String encodeConstant(int entryIndex) throws IOException {

  1587         String[] classRef = { null };

  1588         String s = jc.stringValue(entryIndex, classRef);

  1589         if (classRef[0] != null) {

  1590             if (classRef[0].startsWith("[")) {

  1591                 s = accessClass("java_lang_Class") + "(false).forName__Ljava_lang_Class_2Ljava_lang_String_2('" + classRef[0] + "');";

  1592             } else {

  1593                 addReference(classRef[0]);

  1594                 s = accessClass(s.replace('/', '_')) + "(false).constructor.$class";

  1595             }

  1596         }

  1597         return s;

  1598     }

  1600     private String javaScriptBody(String prefix, MethodData m, boolean isStatic) throws IOException {

  1601         byte[] arr = m.findAnnotationData(true);

  1602         if (arr == null) {

  1603             return null;

  1604         }

  1605         final String jvmType = "Lorg/apidesign/bck2brwsr/core/JavaScriptBody;";

  1606         class P extends AnnotationParser {

  1607             public P() {

  1608                 super(false);

  1609             }

  1611             int cnt;

  1612             String[] args = new String[30];

  1613             String body;

  1615             @Override

  1616             protected void visitAttr(String type, String attr, String at, String value) {

  1617                 if (type.equals(jvmType)) {

  1618                     if ("body".equals(attr)) {

  1619                         body = value;

  1620                     } else if ("args".equals(attr)) {

  1621                         args[cnt++] = value;

  1622                     } else {

  1623                         throw new IllegalArgumentException(attr);

  1624                     }

  1625                 }

  1626             }

  1627         }

  1628         P p = new P();

  1629         p.parse(arr, jc);

  1630         if (p.body == null) {

  1631             return null;

  1632         }

  1633         StringBuilder cnt = new StringBuilder();

  1634         final String mn = findMethodName(m, cnt);

  1635         out.append(prefix).append(mn);

  1636         out.append(" = function(");

  1637         String space = "";

  1638         int index = 0;

  1639         for (int i = 0; i < cnt.length(); i++) {

  1640             out.append(space);

  1641             space = outputArg(out, p.args, index);

  1642             index++;

  1643         }

  1644         out.append(") {").append("\n");

  1645         out.append(p.body);

  1646         out.append("\n}\n");

  1647         return mn;

  1648     }

  1649     private static String className(ClassData jc) {

  1650         //return jc.getName().getInternalName().replace('/', '_');

  1651         return jc.getClassName().replace('/', '_');

  1652     }

  1654     private static String[] findAnnotation(

  1655         byte[] arr, ClassData cd, final String className,

  1656         final String... attrNames

  1657     ) throws IOException {

  1658         if (arr == null) {

  1659             return null;

  1660         }

  1661         final String[] values = new String[attrNames.length];

  1662         final boolean[] found = { false };

  1663         final String jvmType = "L" + className.replace('.', '/') + ";";

  1664         AnnotationParser ap = new AnnotationParser(false) {

  1665             @Override

  1666             protected void visitAttr(String type, String attr, String at, String value) {

  1667                 if (type.equals(jvmType)) {

  1668                     found[0] = true;

  1669                     for (int i = 0; i < attrNames.length; i++) {

  1670                         if (attrNames[i].equals(attr)) {

  1671                             values[i] = value;

  1672                         }

  1673                     }

  1674                 }

  1675             }

  1677         };

  1678         ap.parse(arr, cd);

  1679         return found[0] ? values : null;

  1680     }

  1682     private CharSequence initField(FieldData v) {

  1683         final String is = v.getInternalSig();

  1684         if (is.length() == 1) {

  1685             switch (is.charAt(0)) {

  1686                 case 'S':

  1687                 case 'J':

  1688                 case 'B':

  1689                 case 'Z':

  1690                 case 'C':

  1691                 case 'I': return " = 0;";

  1692                 case 'F':

  1693                 case 'D': return " = 0.0;";

  1694                 default:

  1695                     throw new IllegalStateException(is);

  1696             }

  1697         }

  1698         return " = null;";

  1699     }

  1701     private static void generateAnno(ClassData cd, final Appendable out, byte[] data) throws IOException {

  1702         AnnotationParser ap = new AnnotationParser(true) {

  1703             int anno;

  1704             int cnt;

  1706             @Override

  1707             protected void visitAnnotationStart(String type) throws IOException {

  1708                 if (anno++ > 0) {

  1709                     out.append(",");

  1710                 }

  1711                 out.append('"').append(type).append("\" : {\n");

  1712                 cnt = 0;

  1713             }

  1715             @Override

  1716             protected void visitAnnotationEnd(String type) throws IOException {

  1717                 out.append("\n}\n");

  1718             }

  1720             @Override

  1721             protected void visitAttr(String type, String attr, String attrType, String value)

  1722             throws IOException {

  1723                 if (attr == null) {

  1724                     return;

  1725                 }

  1726                 if (cnt++ > 0) {

  1727                     out.append(",\n");

  1728                 }

  1729                 out.append(attr).append("__").append(attrType).append(" : ").append(value);

  1730             }

  1731         };

  1732         ap.parse(data, cd);

  1733     }

  1735     private static String outputArg(Appendable out, String[] args, int indx) throws IOException {

  1736         final String name = args[indx];

  1737         if (name == null) {

  1738             return "";

  1739         }

  1740         if (name.contains(",")) {

  1741             throw new IOException("Wrong parameter with ',': " + name);

  1742         }

  1743         out.append(name);

  1744         return ",";

  1745     }

  1747     private static void emit(final Appendable out,

  1748                              final String format,

  1749                              final CharSequence... params) throws IOException {

  1750         final int length = format.length();

  1752         int processed = 0;

  1753         int paramOffset = format.indexOf('@');

  1754         while ((paramOffset != -1) && (paramOffset < (length - 1))) {

  1755             final char paramChar = format.charAt(paramOffset + 1);

  1756             if ((paramChar >= '1') && (paramChar <= '9')) {

  1757                 final int paramIndex = paramChar - '0' - 1;

  1759                 out.append(format, processed, paramOffset);

  1760                 out.append(params[paramIndex]);

  1762                 ++paramOffset;

  1763                 processed = paramOffset + 1;

  1764             }

  1766             paramOffset = format.indexOf('@', paramOffset + 1);

  1767         }

  1769         out.append(format, processed, length);

  1770     }

  1772     private void generateCatch(TrapData[] traps) throws IOException {

  1773         out.append("} catch (e) {\n");

  1774         int finallyPC = -1;

  1775         for (TrapData e : traps) {

  1776             if (e == null) {

  1777                 break;

  1778             }

  1779             if (e.catch_cpx != 0) { //not finally

  1780                 final String classInternalName = jc.getClassName(e.catch_cpx);

  1781                 addReference(classInternalName);

  1782                 if ("java/lang/Throwable".equals(classInternalName)) {

  1783                     out.append("if (e.$instOf_java_lang_Throwable) {");

  1784                     out.append("  var stA0 = e;");

  1785                     out.append("} else {");

  1786                     out.append("  var stA0 = vm.java_lang_Throwable(true);");

  1787                     out.append("  vm.java_lang_Throwable.cons__VLjava_lang_String_2.call(stA0, e.toString());");

  1788                     out.append("}");

  1789                     out.append("gt=" + e.handler_pc + "; continue;");

  1790                 } else {

  1791                     out.append("if (e.$instOf_" + classInternalName.replace('/', '_') + ") {");

  1792                     out.append("gt=" + e.handler_pc + "; var stA0 = e; continue;");

  1793                     out.append("}\n");

  1794                 }

  1795             } else {

  1796                 finallyPC = e.handler_pc;

  1797             }

  1798         }

  1799         if (finallyPC == -1) {

  1800             out.append("throw e;");

  1801         } else {

  1802             out.append("gt=" + finallyPC + "; var stA0 = e; continue;");

  1803         }

  1804         out.append("\n}");

  1805     }

  1806 }

author	Jaroslav Tulach <jaroslav.tulach@apidesign.org>
	Sat, 26 Jan 2013 08:47:05 +0100
changeset 592	5e13b1ac2886
parent 587	a7a45e5e5e77
child 593	b42911b78a16
child 639	960ecf7cea5d
child 652	f095ea52f417
permissions	-rw-r--r--