hg/bck2brwsr: rt/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java@f41a1fef7738

     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 static org.apidesign.vm4brwsr.ByteCodeParser.*;

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

    25  *

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

    27  */

    28 abstract class ByteCodeToJavaScript {

    29     private ClassData jc;

    30     final Appendable out;

    32     protected ByteCodeToJavaScript(Appendable out) {

    33         this.out = out;

    34     }

    36     /* Collects additional required resources.

    37      *

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

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

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

    41      */

    42     protected abstract boolean requireReference(String internalClassName);

    44     /*

    45      * @param resourcePath name of resources to read

    46      */

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

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

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

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

    52      *

    53      * @param className suggested name of the class

    54      */

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

    56         return className + " = ";

    57     }

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

    59         return classOperation;

    60     }

    62     /** Prints out a debug message.

    63      *

    64      * @param msg the message

    65      * @return true if the message has been printed

    66      * @throws IOException

    67      */

    68     boolean debug(String msg) throws IOException {

    69         out.append(msg);

    70         return true;

    71     }

    73     /**

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

    75      *

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

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

    78      *

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

    80      */

    82     public String compile(InputStream classFile) throws IOException {

    83         this.jc = new ClassData(classFile);

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

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

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

    87             );

    88         }

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

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

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

    92             "resource", "processByteCode"

    93         );

    94         if (arr != null) {

    95             if (!arr[0].isEmpty()) {

    96                 requireScript(arr[0]);

    97             }

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

    99                 return null;

   100             }

   101         }

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

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

   104             "container", "prototype"

   105         );

   106         StringArray toInitilize = new StringArray();

   107         final String className = className(jc);

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

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

   110         out.append("\n  if (!CLS.$class) {");

   111         if (proto == null) {

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

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

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

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

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

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

   118         } else {

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

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

   121                 proto[0] = "p";

   122             }

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

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

   125         }

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

   127             if (v.isStatic()) {

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

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

   130                    .append("  if (arguments.length == 1) CLS.").append(v.getName())

   131                    .append(" = v; return CLS.").

   132                     append(v.getName()).append("; };");

   133             } else {

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

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

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

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

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

   139                    .append("; };");

   140             }

   141         }

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

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

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

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

   146                 "name", "value"

   147             );

   148             if (only != null) {

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

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

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

   152                 }

   153                 continue;

   154             }

   155             String prefix;

   156             String mn;

   157             if (m.isStatic()) {

   158                 prefix = "\n    c.";

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

   160             } else {

   161                 if (m.isConstructor()) {

   162                     prefix = "\n    CLS.";

   163                     mn = generateInstanceMethod(prefix, m);

   164                 } else {

   165                     prefix = "\n    c.";

   166                     mn = generateInstanceMethod(prefix, m);

   167                 }

   168             }

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

   170             if (runAnno != null) {

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

   172                 generateAnno(jc, out, runAnno);

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

   174             }

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

   176             out.append(prefix).append(mn).append(".cls = CLS;");

   177         }

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

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

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

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

   182         }

   183         out.append("\n    CLS.$class = 'temp';");

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

   197             out.append("\n    ").append(init).append("();");

   198         }

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

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

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

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

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

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

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

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

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

   208                 "name", "value"

   209             );

   210             if (only != null) {

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

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

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

   214                 }

   215                 continue;

   216             }

   217             if (!v.isStatic()) {

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

   219                     append(className).append('_').

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

   221             }

   222         }

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

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

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

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

   227 //        StringBuilder sb = new StringBuilder();

   228 //        for (String init : toInitilize.toArray()) {

   229 //            sb.append("\n").append(init).append("();");

   230 //        }

   231         return "";

   232     }

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

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

   235         if (jsb != null) {

   236             return jsb;

   237         }

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

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

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

   241         }

   242         generateMethod(prefix, mn, m);

   243         return mn;

   244     }

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

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

   248         if (jsb != null) {

   249             return jsb;

   250         }

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

   252         generateMethod(prefix, mn, m);

   253         return mn;

   254     }

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

   257             throws IOException {

   258         final StackMapIterator stackMapIterator = m.createStackMapIterator();

   259         TrapDataIterator trap = m.getTrapDataIterator();

   260         final LocalsMapper lmapper =

   261                 new LocalsMapper(stackMapIterator.getArguments());

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

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

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

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

   268         if (byteCodes == null) {

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

   270                .append(jc.getClassName()).append('.')

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

   272             out.append("};");

   273             return;

   274         }

   276         final StackMapper smapper = new StackMapper();

   278         if (!m.isStatic()) {

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

   280         }

   282         int lastStackFrame = -1;

   283         TrapData[] previousTrap = null;

   284         boolean wide = false;

   286         out.append("\n  var gt = 0;\n");

   287         int openBraces = 0;

   288         int topMostLabel = 0;

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

   290             int prev = i;

   291             stackMapIterator.advanceTo(i);

   292             boolean changeInCatch = trap.advanceTo(i);

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

   294                 if (previousTrap != null) {

   295                     generateCatch(previousTrap, i, topMostLabel);

   296                     previousTrap = null;

   297                 }

   298             }

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

   300                 if (i != 0) {

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

   302                 }

   303                 if (openBraces > 64) {

   304                     for (int c = 0; c < 64; c++) {

   305                         out.append("break;}\n");

   306                     }

   307                     openBraces = 1;

   308                     topMostLabel = i;

   309                 }

   311                 lastStackFrame = stackMapIterator.getFrameIndex();

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

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

   314                 out.append("    X_" + i).append(": for (;;) { IF: if (gt <= " + i + ") {\n");

   315                 openBraces++;

   316                 changeInCatch = true;

   317             } else {

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

   319             }

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

   321                 out.append("try {");

   322                 previousTrap = trap.current();

   323             }

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

   325             switch (c) {

   326                 case opc_aload_0:

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

   328                     break;

   329                 case opc_iload_0:

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

   331                     break;

   332                 case opc_lload_0:

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

   334                     break;

   335                 case opc_fload_0:

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

   337                     break;

   338                 case opc_dload_0:

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

   340                     break;

   341                 case opc_aload_1:

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

   343                     break;

   344                 case opc_iload_1:

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

   346                     break;

   347                 case opc_lload_1:

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

   349                     break;

   350                 case opc_fload_1:

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

   352                     break;

   353                 case opc_dload_1:

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

   355                     break;

   356                 case opc_aload_2:

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

   358                     break;

   359                 case opc_iload_2:

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

   361                     break;

   362                 case opc_lload_2:

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

   364                     break;

   365                 case opc_fload_2:

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

   367                     break;

   368                 case opc_dload_2:

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

   370                     break;

   371                 case opc_aload_3:

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

   373                     break;

   374                 case opc_iload_3:

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

   376                     break;

   377                 case opc_lload_3:

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

   379                     break;

   380                 case opc_fload_3:

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

   382                     break;

   383                 case opc_dload_3:

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

   385                     break;

   386                 case opc_iload: {

   387                     ++i;

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

   389                                           : readUByte(byteCodes, i);

   390                     wide = false;

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

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

   393                     break;

   394                 }

   395                 case opc_lload: {

   396                     ++i;

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

   398                                           : readUByte(byteCodes, i);

   399                     wide = false;

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

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

   402                     break;

   403                 }

   404                 case opc_fload: {

   405                     ++i;

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

   407                                           : readUByte(byteCodes, i);

   408                     wide = false;

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

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

   411                     break;

   412                 }

   413                 case opc_dload: {

   414                     ++i;

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

   416                                           : readUByte(byteCodes, i);

   417                     wide = false;

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

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

   420                     break;

   421                 }

   422                 case opc_aload: {

   423                     ++i;

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

   425                                           : readUByte(byteCodes, i);

   426                     wide = false;

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

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

   429                     break;

   430                 }

   431                 case opc_istore: {

   432                     ++i;

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

   434                                           : readUByte(byteCodes, i);

   435                     wide = false;

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

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

   438                     break;

   439                 }

   440                 case opc_lstore: {

   441                     ++i;

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

   443                                           : readUByte(byteCodes, i);

   444                     wide = false;

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

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

   447                     break;

   448                 }

   449                 case opc_fstore: {

   450                     ++i;

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

   452                                           : readUByte(byteCodes, i);

   453                     wide = false;

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

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

   456                     break;

   457                 }

   458                 case opc_dstore: {

   459                     ++i;

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

   461                                           : readUByte(byteCodes, i);

   462                     wide = false;

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

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

   465                     break;

   466                 }

   467                 case opc_astore: {

   468                     ++i;

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

   470                                           : readUByte(byteCodes, i);

   471                     wide = false;

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

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

   474                     break;

   475                 }

   476                 case opc_astore_0:

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

   478                     break;

   479                 case opc_istore_0:

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

   481                     break;

   482                 case opc_lstore_0:

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

   484                     break;

   485                 case opc_fstore_0:

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

   487                     break;

   488                 case opc_dstore_0:

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

   490                     break;

   491                 case opc_astore_1:

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

   493                     break;

   494                 case opc_istore_1:

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

   496                     break;

   497                 case opc_lstore_1:

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

   499                     break;

   500                 case opc_fstore_1:

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

   502                     break;

   503                 case opc_dstore_1:

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

   505                     break;

   506                 case opc_astore_2:

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

   508                     break;

   509                 case opc_istore_2:

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

   511                     break;

   512                 case opc_lstore_2:

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

   514                     break;

   515                 case opc_fstore_2:

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

   517                     break;

   518                 case opc_dstore_2:

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

   520                     break;

   521                 case opc_astore_3:

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

   523                     break;

   524                 case opc_istore_3:

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

   526                     break;

   527                 case opc_lstore_3:

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

   529                     break;

   530                 case opc_fstore_3:

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

   532                     break;

   533                 case opc_dstore_3:

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

   535                     break;

   536                 case opc_iadd:

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

   538                     break;

   539                 case opc_ladd:

   540                     emit(out, "@1 = @1.add64(@2);", smapper.getL(1), smapper.popL());

   541                     break;

   542                 case opc_fadd:

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

   544                     break;

   545                 case opc_dadd:

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

   547                     break;

   548                 case opc_isub:

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

   550                     break;

   551                 case opc_lsub:

   552                     emit(out, "@1 = @1.sub64(@2);", smapper.getL(1), smapper.popL());

   553                     break;

   554                 case opc_fsub:

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

   556                     break;

   557                 case opc_dsub:

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

   559                     break;

   560                 case opc_imul:

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

   562                     break;

   563                 case opc_lmul:

   564                     emit(out, "@1 = @1.mul64(@2);", smapper.getL(1), smapper.popL());

   565                     break;

   566                 case opc_fmul:

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

   568                     break;

   569                 case opc_dmul:

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

   571                     break;

   572                 case opc_idiv:

   573                     emit(out, "@1 = @1.div32(@2);",

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

   575                     break;

   576                 case opc_ldiv:

   577                     emit(out, "@1 = @1.div64(@2);",

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

   579                     break;

   580                 case opc_fdiv:

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

   582                     break;

   583                 case opc_ddiv:

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

   585                     break;

   586                 case opc_irem:

   587                     emit(out, "@1 = @1.mod32(@2);",

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

   589                     break;

   590                 case opc_lrem:

   591                     emit(out, "@1 = @1.mod64(@2);",

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

   593                     break;

   594                 case opc_frem:

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

   596                     break;

   597                 case opc_drem:

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

   599                     break;

   600                 case opc_iand:

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

   602                     break;

   603                 case opc_land:

   604                     emit(out, "@1 = @1.and64(@2);", smapper.getL(1), smapper.popL());

   605                     break;

   606                 case opc_ior:

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

   608                     break;

   609                 case opc_lor:

   610                     emit(out, "@1 = @1.or64(@2);", smapper.getL(1), smapper.popL());

   611                     break;

   612                 case opc_ixor:

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

   614                     break;

   615                 case opc_lxor:

   616                     emit(out, "@1 = @1.xor64(@2);", smapper.getL(1), smapper.popL());

   617                     break;

   618                 case opc_ineg:

   619                     emit(out, "@1 = @1.neg32();", smapper.getI(0));

   620                     break;

   621                 case opc_lneg:

   622                     emit(out, "@1 = @1.neg64();", smapper.getL(0));

   623                     break;

   624                 case opc_fneg:

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

   626                     break;

   627                 case opc_dneg:

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

   629                     break;

   630                 case opc_ishl:

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

   632                     break;

   633                 case opc_lshl:

   634                     emit(out, "@1 = @1.shl64(@2);", smapper.getL(1), smapper.popI());

   635                     break;

   636                 case opc_ishr:

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

   638                     break;

   639                 case opc_lshr:

   640                     emit(out, "@1 = @1.shr64(@2);", smapper.getL(1), smapper.popI());

   641                     break;

   642                 case opc_iushr:

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

   644                     break;

   645                 case opc_lushr:

   646                     emit(out, "@1 = @1.ushr64(@2);", smapper.getL(1), smapper.popI());

   647                     break;

   648                 case opc_iinc: {

   649                     ++i;

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

   651                                              : readUByte(byteCodes, i);

   652                     ++i;

   653                     final int incrBy = wide ? readShort(byteCodes, i++)

   654                                             : byteCodes[i];

   655                     wide = false;

   656                     if (incrBy == 1) {

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

   658                     } else {

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

   660                              lmapper.getI(varIndx),

   661                              Integer.toString(incrBy));

   662                     }

   663                     break;

   664                 }

   665                 case opc_return:

   666                     emit(out, "return;");

   667                     break;

   668                 case opc_ireturn:

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

   670                     break;

   671                 case opc_lreturn:

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

   673                     break;

   674                 case opc_freturn:

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

   676                     break;

   677                 case opc_dreturn:

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

   679                     break;

   680                 case opc_areturn:

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

   682                     break;

   683                 case opc_i2l:

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

   685                     break;

   686                 case opc_i2f:

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

   688                     break;

   689                 case opc_i2d:

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

   691                     break;

   692                 case opc_l2i:

   693                     emit(out, "var @2 = @1.toInt32();", smapper.popL(), smapper.pushI());

   694                     break;

   695                     // max int check?

   696                 case opc_l2f:

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

   698                     break;

   699                 case opc_l2d:

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

   701                     break;

   702                 case opc_f2d:

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

   704                     break;

   705                 case opc_d2f:

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

   707                     break;

   708                 case opc_f2i:

   709                     emit(out, "var @2 = @1.toInt32();",

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

   711                     break;

   712                 case opc_f2l:

   713                     emit(out, "var @2 = @1.toLong();",

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

   715                     break;

   716                 case opc_d2i:

   717                     emit(out, "var @2 = @1.toInt32();",

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

   719                     break;

   720                 case opc_d2l:

   721                     emit(out, "var @2 = @1.toLong();",

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

   723                     break;

   724                 case opc_i2b:

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

   726                     break;

   727                 case opc_i2c:

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

   729                     break;

   730                 case opc_i2s:

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

   732                     break;

   733                 case opc_aconst_null:

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

   735                     break;

   736                 case opc_iconst_m1:

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

   738                     break;

   739                 case opc_iconst_0:

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

   741                     break;

   742                 case opc_dconst_0:

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

   744                     break;

   745                 case opc_lconst_0:

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

   747                     break;

   748                 case opc_fconst_0:

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

   750                     break;

   751                 case opc_iconst_1:

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

   753                     break;

   754                 case opc_lconst_1:

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

   756                     break;

   757                 case opc_fconst_1:

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

   759                     break;

   760                 case opc_dconst_1:

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

   762                     break;

   763                 case opc_iconst_2:

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

   765                     break;

   766                 case opc_fconst_2:

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

   768                     break;

   769                 case opc_iconst_3:

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

   771                     break;

   772                 case opc_iconst_4:

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

   774                     break;

   775                 case opc_iconst_5:

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

   777                     break;

   778                 case opc_ldc: {

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

   780                     String v = encodeConstant(indx);

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

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

   783                     break;

   784                 }

   785                 case opc_ldc_w:

   786                 case opc_ldc2_w: {

   787                     int indx = readIntArg(byteCodes, i);

   788                     i += 2;

   789                     String v = encodeConstant(indx);

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

   791                     if (type == VarType.LONG) {

   792                         final Long lv = new Long(v);

   793                         final int low = (int)(lv.longValue() & 0xFFFFFFFF);

   794                         final int hi = (int)(lv.longValue() >> 32);

   795                         emit(out, "var @1 = 0x@3.next32(0x@2);", smapper.pushL(),

   796                                 Integer.toHexString(low), Integer.toHexString(hi));

   797                     } else {

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

   799                     }

   800                     break;

   801                 }

   802                 case opc_lcmp:

   803                     emit(out, "var @3 = @2.compare64(@1);",

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

   805                     break;

   806                 case opc_fcmpl:

   807                 case opc_fcmpg:

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

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

   810                     break;

   811                 case opc_dcmpl:

   812                 case opc_dcmpg:

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

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

   815                     break;

   816                 case opc_if_acmpeq:

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

   818                                    "===", topMostLabel);

   819                     break;

   820                 case opc_if_acmpne:

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

   822                                    "!==", topMostLabel);

   823                     break;

   824                 case opc_if_icmpeq:

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

   826                                    "==", topMostLabel);

   827                     break;

   828                 case opc_ifeq: {

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

   830                     emitIf(out, "if (@1 == 0) ",

   831                          smapper.popI(), i, indx, topMostLabel);

   832                     i += 2;

   833                     break;

   834                 }

   835                 case opc_ifne: {

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

   837                     emitIf(out, "if (@1 != 0) ",

   838                          smapper.popI(), i, indx, topMostLabel);

   839                     i += 2;

   840                     break;

   841                 }

   842                 case opc_iflt: {

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

   844                     emitIf(out, "if (@1 < 0) ",

   845                          smapper.popI(), i, indx, topMostLabel);

   846                     i += 2;

   847                     break;

   848                 }

   849                 case opc_ifle: {

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

   851                     emitIf(out, "if (@1 <= 0) ",

   852                          smapper.popI(), i, indx, topMostLabel);

   853                     i += 2;

   854                     break;

   855                 }

   856                 case opc_ifgt: {

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

   858                     emitIf(out, "if (@1 > 0) ",

   859                          smapper.popI(), i, indx, topMostLabel);

   860                     i += 2;

   861                     break;

   862                 }

   863                 case opc_ifge: {

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

   865                     emitIf(out, "if (@1 >= 0) ",

   866                          smapper.popI(), i, indx, topMostLabel);

   867                     i += 2;

   868                     break;

   869                 }

   870                 case opc_ifnonnull: {

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

   872                     emitIf(out, "if (@1 !== null) ",

   873                          smapper.popA(), i, indx, topMostLabel);

   874                     i += 2;

   875                     break;

   876                 }

   877                 case opc_ifnull: {

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

   879                     emitIf(out, "if (@1 === null) ",

   880                          smapper.popA(), i, indx, topMostLabel);

   881                     i += 2;

   882                     break;

   883                 }

   884                 case opc_if_icmpne:

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

   886                                    "!=", topMostLabel);

   887                     break;

   888                 case opc_if_icmplt:

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

   890                                    "<", topMostLabel);

   891                     break;

   892                 case opc_if_icmple:

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

   894                                    "<=", topMostLabel);

   895                     break;

   896                 case opc_if_icmpgt:

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

   898                                    ">", topMostLabel);

   899                     break;

   900                 case opc_if_icmpge:

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

   902                                    ">=", topMostLabel);

   903                     break;

   904                 case opc_goto: {

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

   906                     goTo(out, i, indx, topMostLabel);

   907                     i += 2;

   908                     break;

   909                 }

   910                 case opc_lookupswitch: {

   911                     i = generateLookupSwitch(i, byteCodes, smapper, topMostLabel);

   912                     break;

   913                 }

   914                 case opc_tableswitch: {

   915                     i = generateTableSwitch(i, byteCodes, smapper, topMostLabel);

   916                     break;

   917                 }

   918                 case opc_invokeinterface: {

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

   920                     break;

   921                 }

   922                 case opc_invokevirtual:

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

   924                     break;

   925                 case opc_invokespecial:

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

   927                     break;

   928                 case opc_invokestatic:

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

   930                     break;

   931                 case opc_new: {

   932                     int indx = readIntArg(byteCodes, i);

   933                     String ci = jc.getClassName(indx);

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

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

   936                     addReference(ci);

   937                     i += 2;

   938                     break;

   939                 }

   940                 case opc_newarray:

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

   942                     generateNewArray(atype, smapper);

   943                     break;

   944                 case opc_anewarray: {

   945                     int type = readIntArg(byteCodes, i);

   946                     i += 2;

   947                     generateANewArray(type, smapper);

   948                     break;

   949                 }

   950                 case opc_multianewarray: {

   951                     int type = readIntArg(byteCodes, i);

   952                     i += 2;

   953                     i = generateMultiANewArray(type, byteCodes, i, smapper);

   954                     break;

   955                 }

   956                 case opc_arraylength:

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

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

   959                     break;

   960                 case opc_lastore:

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

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

   963                     break;

   964                 case opc_fastore:

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

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

   967                     break;

   968                 case opc_dastore:

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

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

   971                     break;

   972                 case opc_aastore:

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

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

   975                     break;

   976                 case opc_iastore:

   977                 case opc_bastore:

   978                 case opc_castore:

   979                 case opc_sastore:

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

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

   982                     break;

   983                 case opc_laload:

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

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

   986                     break;

   987                 case opc_faload:

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

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

   990                     break;

   991                 case opc_daload:

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

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

   994                     break;

   995                 case opc_aaload:

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

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

   998                     break;

   999                 case opc_iaload:

  1000                 case opc_baload:

  1001                 case opc_caload:

  1002                 case opc_saload:

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

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

  1005                     break;

  1006                 case opc_pop:

  1007                 case opc_pop2:

  1008                     smapper.pop(1);

  1009                     debug("/* pop */");

  1010                     break;

  1011                 case opc_dup: {

  1012                     final Variable v = smapper.get(0);

  1013                     emit(out, "var @1 = @2;", smapper.pushT(v.getType()), v);

  1014                     break;

  1015                 }

  1016                 case opc_dup2: {

  1017                     final Variable vi1 = smapper.get(0);

  1019                     if (vi1.isCategory2()) {

  1020                         emit(out, "var @1 = @2;",

  1021                              smapper.pushT(vi1.getType()), vi1);

  1022                     } else {

  1023                         final Variable vi2 = smapper.get(1);

  1024                         emit(out, "var @1 = @2, @3 = @4;",

  1025                              smapper.pushT(vi2.getType()), vi2,

  1026                              smapper.pushT(vi1.getType()), vi1);

  1027                     }

  1028                     break;

  1029                 }

  1030                 case opc_dup_x1: {

  1031                     final Variable vi1 = smapper.pop();

  1032                     final Variable vi2 = smapper.pop();

  1033                     final Variable vo3 = smapper.pushT(vi1.getType());

  1034                     final Variable vo2 = smapper.pushT(vi2.getType());

  1035                     final Variable vo1 = smapper.pushT(vi1.getType());

  1037                     emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1038                          vo1, vi1, vo2, vi2, vo3, vo1);

  1039                     break;

  1040                 }

  1041                 case opc_dup2_x1: {

  1042                     final Variable vi1 = smapper.pop();

  1043                     final Variable vi2 = smapper.pop();

  1045                     if (vi1.isCategory2()) {

  1046                         final Variable vo3 = smapper.pushT(vi1.getType());

  1047                         final Variable vo2 = smapper.pushT(vi2.getType());

  1048                         final Variable vo1 = smapper.pushT(vi1.getType());

  1050                         emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1051                              vo1, vi1, vo2, vi2, vo3, vo1);

  1052                     } else {

  1053                         final Variable vi3 = smapper.pop();

  1054                         final Variable vo5 = smapper.pushT(vi2.getType());

  1055                         final Variable vo4 = smapper.pushT(vi1.getType());

  1056                         final Variable vo3 = smapper.pushT(vi3.getType());

  1057                         final Variable vo2 = smapper.pushT(vi2.getType());

  1058                         final Variable vo1 = smapper.pushT(vi1.getType());

  1060                         emit(out, "var @1 = @2, @3 = @4, @5 = @6,",

  1061                              vo1, vi1, vo2, vi2, vo3, vi3);

  1062                         emit(out, " @1 = @2, @3 = @4;",

  1063                              vo4, vo1, vo5, vo2);

  1064                     }

  1065                     break;

  1066                 }

  1067                 case opc_dup_x2: {

  1068                     final Variable vi1 = smapper.pop();

  1069                     final Variable vi2 = smapper.pop();

  1071                     if (vi2.isCategory2()) {

  1072                         final Variable vo3 = smapper.pushT(vi1.getType());

  1073                         final Variable vo2 = smapper.pushT(vi2.getType());

  1074                         final Variable vo1 = smapper.pushT(vi1.getType());

  1076                         emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1077                              vo1, vi1, vo2, vi2, vo3, vo1);

  1078                     } else {

  1079                         final Variable vi3 = smapper.pop();

  1080                         final Variable vo4 = smapper.pushT(vi1.getType());

  1081                         final Variable vo3 = smapper.pushT(vi3.getType());

  1082                         final Variable vo2 = smapper.pushT(vi2.getType());

  1083                         final Variable vo1 = smapper.pushT(vi1.getType());

  1085                         emit(out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8;",

  1086                              vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);

  1087                     }

  1088                     break;

  1089                 }

  1090                 case opc_dup2_x2: {

  1091                     final Variable vi1 = smapper.pop();

  1092                     final Variable vi2 = smapper.pop();

  1094                     if (vi1.isCategory2()) {

  1095                         if (vi2.isCategory2()) {

  1096                             final Variable vo3 = smapper.pushT(vi1.getType());

  1097                             final Variable vo2 = smapper.pushT(vi2.getType());

  1098                             final Variable vo1 = smapper.pushT(vi1.getType());

  1100                             emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1101                                  vo1, vi1, vo2, vi2, vo3, vo1);

  1102                         } else {

  1103                             final Variable vi3 = smapper.pop();

  1104                             final Variable vo4 = smapper.pushT(vi1.getType());

  1105                             final Variable vo3 = smapper.pushT(vi3.getType());

  1106                             final Variable vo2 = smapper.pushT(vi2.getType());

  1107                             final Variable vo1 = smapper.pushT(vi1.getType());

  1109                             emit(out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8;",

  1110                                  vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);

  1111                         }

  1112                     } else {

  1113                         final Variable vi3 = smapper.pop();

  1115                         if (vi3.isCategory2()) {

  1116                             final Variable vo5 = smapper.pushT(vi2.getType());

  1117                             final Variable vo4 = smapper.pushT(vi1.getType());

  1118                             final Variable vo3 = smapper.pushT(vi3.getType());

  1119                             final Variable vo2 = smapper.pushT(vi2.getType());

  1120                             final Variable vo1 = smapper.pushT(vi1.getType());

  1122                             emit(out, "var @1 = @2, @3 = @4, @5 = @6,",

  1123                                  vo1, vi1, vo2, vi2, vo3, vi3);

  1124                             emit(out, " @1 = @2, @3 = @4;",

  1125                                  vo4, vo1, vo5, vo2);

  1126                         } else {

  1127                             final Variable vi4 = smapper.pop();

  1128                             final Variable vo6 = smapper.pushT(vi2.getType());

  1129                             final Variable vo5 = smapper.pushT(vi1.getType());

  1130                             final Variable vo4 = smapper.pushT(vi4.getType());

  1131                             final Variable vo3 = smapper.pushT(vi3.getType());

  1132                             final Variable vo2 = smapper.pushT(vi2.getType());

  1133                             final Variable vo1 = smapper.pushT(vi1.getType());

  1135                             emit(out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8,",

  1136                                  vo1, vi1, vo2, vi2, vo3, vi3, vo4, vi4);

  1137                             emit(out, " @1 = @2, @3 = @4;",

  1138                                  vo5, vo1, vo6, vo2);

  1139                         }

  1140                     }

  1141                     break;

  1142                 }

  1143                 case opc_swap: {

  1144                     final Variable vi1 = smapper.get(0);

  1145                     final Variable vi2 = smapper.get(1);

  1147                     if (vi1.getType() == vi2.getType()) {

  1148                         final Variable tmp = smapper.pushT(vi1.getType());

  1150                         emit(out, "var @1 = @2, @2 = @3, @3 = @1;",

  1151                              tmp, vi1, vi2);

  1152                         smapper.pop(1);

  1153                     } else {

  1154                         smapper.pop(2);

  1155                         smapper.pushT(vi1.getType());

  1156                         smapper.pushT(vi2.getType());

  1157                     }

  1158                     break;

  1159                 }

  1160                 case opc_bipush:

  1161                     emit(out, "var @1 = @2;",

  1162                          smapper.pushI(), Integer.toString(byteCodes[++i]));

  1163                     break;

  1164                 case opc_sipush:

  1165                     emit(out, "var @1 = @2;",

  1166                          smapper.pushI(),

  1167                          Integer.toString(readIntArg(byteCodes, i)));

  1168                     i += 2;

  1169                     break;

  1170                 case opc_getfield: {

  1171                     int indx = readIntArg(byteCodes, i);

  1172                     String[] fi = jc.getFieldInfoName(indx);

  1173                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1174                     final String mangleClass = mangleSig(fi[0]);

  1175                     final String mangleClassAccess = accessClass(mangleClass);

  1176                     emit(out, "var @2 = @4(false)._@3.call(@1);",

  1177                          smapper.popA(),

  1178                          smapper.pushT(type), fi[1], mangleClassAccess

  1179                     );

  1180                     i += 2;

  1181                     break;

  1182                 }

  1183                 case opc_putfield: {

  1184                     int indx = readIntArg(byteCodes, i);

  1185                     String[] fi = jc.getFieldInfoName(indx);

  1186                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1187                     final String mangleClass = mangleSig(fi[0]);

  1188                     final String mangleClassAccess = accessClass(mangleClass);

  1189                     emit(out, "@4(false)._@3.call(@2, @1);",

  1190                          smapper.popT(type),

  1191                          smapper.popA(), fi[1],

  1192                          mangleClassAccess

  1193                     );

  1194                     i += 2;

  1195                     break;

  1196                 }

  1197                 case opc_getstatic: {

  1198                     int indx = readIntArg(byteCodes, i);

  1199                     String[] fi = jc.getFieldInfoName(indx);

  1200                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1201                     emit(out, "var @1 = @2(false)._@3();",

  1202                          smapper.pushT(type),

  1203                          accessClass(fi[0].replace('/', '_')), fi[1]);

  1204                     i += 2;

  1205                     addReference(fi[0]);

  1206                     break;

  1207                 }

  1208                 case opc_putstatic: {

  1209                     int indx = readIntArg(byteCodes, i);

  1210                     String[] fi = jc.getFieldInfoName(indx);

  1211                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1212                     emit(out, "@1(false)._@2(@3);",

  1213                          accessClass(fi[0].replace('/', '_')), fi[1],

  1214                          smapper.popT(type));

  1215                     i += 2;

  1216                     addReference(fi[0]);

  1217                     break;

  1218                 }

  1219                 case opc_checkcast: {

  1220                     int indx = readIntArg(byteCodes, i);

  1221                     generateCheckcast(indx, smapper);

  1222                     i += 2;

  1223                     break;

  1224                 }

  1225                 case opc_instanceof: {

  1226                     int indx = readIntArg(byteCodes, i);

  1227                     generateInstanceOf(indx, smapper);

  1228                     i += 2;

  1229                     break;

  1230                 }

  1231                 case opc_athrow: {

  1232                     final Variable v = smapper.popA();

  1233                     smapper.clear();

  1235                     emit(out, "{ var @1 = @2; throw @2; }",

  1236                          smapper.pushA(), v);

  1237                     break;

  1238                 }

  1240                 case opc_monitorenter: {

  1241                     out.append("/* monitor enter */");

  1242                     smapper.popA();

  1243                     break;

  1244                 }

  1246                 case opc_monitorexit: {

  1247                     out.append("/* monitor exit */");

  1248                     smapper.popA();

  1249                     break;

  1250                 }

  1252                 case opc_wide:

  1253                     wide = true;

  1254                     break;

  1256                 default: {

  1257                     wide = false;

  1258                     emit(out, "throw 'unknown bytecode @1';",

  1259                          Integer.toString(c));

  1260                 }

  1261             }

  1262             if (debug(" //")) {

  1263                 generateByteCodeComment(prev, i, byteCodes);

  1264             }

  1265             out.append("\n");

  1266         }

  1267         if (previousTrap != null) {

  1268             generateCatch(previousTrap, byteCodes.length, topMostLabel);

  1269         }

  1270         out.append("\n    }\n");

  1271         while (openBraces-- > 0) {

  1272             out.append('}');

  1273         }

  1274         out.append("\n};");

  1275     }

  1277     private int generateIf(byte[] byteCodes, int i, final Variable v2, final Variable v1, final String test, int topMostLabel) throws IOException {

  1278         int indx = i + readIntArg(byteCodes, i);

  1279         out.append("if (").append(v1)

  1280            .append(' ').append(test).append(' ')

  1281            .append(v2).append(") ");

  1282         goTo(out, i, indx, topMostLabel);

  1283         return i + 2;

  1284     }

  1286     private int readIntArg(byte[] byteCodes, int offsetInstruction) {

  1287         final int indxHi = byteCodes[offsetInstruction + 1] << 8;

  1288         final int indxLo = byteCodes[offsetInstruction + 2];

  1289         return (indxHi & 0xffffff00) | (indxLo & 0xff);

  1290     }

  1291     private int readInt4(byte[] byteCodes, int offset) {

  1292         final int d = byteCodes[offset + 0] << 24;

  1293         final int c = byteCodes[offset + 1] << 16;

  1294         final int b = byteCodes[offset + 2] << 8;

  1295         final int a = byteCodes[offset + 3];

  1296         return (d & 0xff000000) | (c & 0xff0000) | (b & 0xff00) | (a & 0xff);

  1297     }

  1298     private int readUByte(byte[] byteCodes, int offset) {

  1299         return byteCodes[offset] & 0xff;

  1300     }

  1302     private int readUShort(byte[] byteCodes, int offset) {

  1303         return ((byteCodes[offset] & 0xff) << 8)

  1304                     | (byteCodes[offset + 1] & 0xff);

  1305     }

  1307     private int readShort(byte[] byteCodes, int offset) {

  1308         return (byteCodes[offset] << 8)

  1309                     | (byteCodes[offset + 1] & 0xff);

  1310     }

  1312     private static void countArgs(String descriptor, char[] returnType, StringBuilder sig, StringBuilder cnt) {

  1313         int i = 0;

  1314         Boolean count = null;

  1315         boolean array = false;

  1316         sig.append("__");

  1317         int firstPos = sig.length();

  1318         while (i < descriptor.length()) {

  1319             char ch = descriptor.charAt(i++);

  1320             switch (ch) {

  1321                 case '(':

  1322                     count = true;

  1323                     continue;

  1324                 case ')':

  1325                     count = false;

  1326                     continue;

  1327                 case 'B':

  1328                 case 'C':

  1329                 case 'D':

  1330                 case 'F':

  1331                 case 'I':

  1332                 case 'J':

  1333                 case 'S':

  1334                 case 'Z':

  1335                     if (count) {

  1336                         if (array) {

  1337                             sig.append("_3");

  1338                         }

  1339                         sig.append(ch);

  1340                         if (ch == 'J' || ch == 'D') {

  1341                             cnt.append('1');

  1342                         } else {

  1343                             cnt.append('0');

  1344                         }

  1345                     } else {

  1346                         sig.insert(firstPos, ch);

  1347                         if (array) {

  1348                             returnType[0] = '[';

  1349                             sig.insert(firstPos, "_3");

  1350                         } else {

  1351                             returnType[0] = ch;

  1352                         }

  1353                     }

  1354                     array = false;

  1355                     continue;

  1356                 case 'V':

  1357                     assert !count;

  1358                     returnType[0] = 'V';

  1359                     sig.insert(firstPos, 'V');

  1360                     continue;

  1361                 case 'L':

  1362                     int next = descriptor.indexOf(';', i);

  1363                     String realSig = mangleSig(descriptor, i - 1, next + 1);

  1364                     if (count) {

  1365                         if (array) {

  1366                             sig.append("_3");

  1367                         }

  1368                         sig.append(realSig);

  1369                         cnt.append('0');

  1370                     } else {

  1371                         sig.insert(firstPos, realSig);

  1372                         if (array) {

  1373                             sig.insert(firstPos, "_3");

  1374                         }

  1375                         returnType[0] = 'L';

  1376                     }

  1377                     i = next + 1;

  1378                     array = false;

  1379                     continue;

  1380                 case '[':

  1381                     array = true;

  1382                     continue;

  1383                 default:

  1384                     throw new IllegalStateException("Invalid char: " + ch);

  1385             }

  1386         }

  1387     }

  1389     static String mangleSig(String sig) {

  1390         return mangleSig(sig, 0, sig.length());

  1391     }

  1393     private static String mangleSig(String txt, int first, int last) {

  1394         StringBuilder sb = new StringBuilder();

  1395         for (int i = first; i < last; i++) {

  1396             final char ch = txt.charAt(i);

  1397             switch (ch) {

  1398                 case '/': sb.append('_'); break;

  1399                 case '_': sb.append("_1"); break;

  1400                 case ';': sb.append("_2"); break;

  1401                 case '[': sb.append("_3"); break;

  1402                 default: sb.append(ch); break;

  1403             }

  1404         }

  1405         return sb.toString();

  1406     }

  1408     private static String findMethodName(MethodData m, StringBuilder cnt) {

  1409         StringBuilder name = new StringBuilder();

  1410         if ("<init>".equals(m.getName())) { // NOI18N

  1411             name.append("cons"); // NOI18N

  1412         } else if ("<clinit>".equals(m.getName())) { // NOI18N

  1413             name.append("class"); // NOI18N

  1414         } else {

  1415             name.append(m.getName());

  1416         }

  1418         countArgs(m.getInternalSig(), new char[1], name, cnt);

  1419         return name.toString();

  1420     }

  1422     static String findMethodName(String[] mi, StringBuilder cnt, char[] returnType) {

  1423         StringBuilder name = new StringBuilder();

  1424         String descr = mi[2];//mi.getDescriptor();

  1425         String nm= mi[1];

  1426         if ("<init>".equals(nm)) { // NOI18N

  1427             name.append("cons"); // NOI18N

  1428         } else {

  1429             name.append(nm);

  1430         }

  1431         countArgs(descr, returnType, name, cnt);

  1432         return name.toString();

  1433     }

  1435     private int invokeStaticMethod(byte[] byteCodes, int i, final StackMapper mapper, boolean isStatic)

  1436     throws IOException {

  1437         int methodIndex = readIntArg(byteCodes, i);

  1438         String[] mi = jc.getFieldInfoName(methodIndex);

  1439         char[] returnType = { 'V' };

  1440         StringBuilder cnt = new StringBuilder();

  1441         String mn = findMethodName(mi, cnt, returnType);

  1443         final int numArguments = isStatic ? cnt.length() : cnt.length() + 1;

  1444         final Variable[] vars = new Variable[numArguments];

  1446         for (int j = numArguments - 1; j >= 0; --j) {

  1447             vars[j] = mapper.pop();

  1448         }

  1450         if (returnType[0] != 'V') {

  1451             out.append("var ")

  1452                .append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1453                .append(" = ");

  1454         }

  1456         final String in = mi[0];

  1457         out.append(accessClass(in.replace('/', '_')));

  1458         out.append("(false).");

  1459         if (mn.startsWith("cons_")) {

  1460             out.append("constructor.");

  1461         }

  1462         out.append(mn);

  1463         if (isStatic) {

  1464             out.append('(');

  1465         } else {

  1466             out.append(".call(");

  1467         }

  1468         if (numArguments > 0) {

  1469             out.append(vars[0]);

  1470             for (int j = 1; j < numArguments; ++j) {

  1471                 out.append(", ");

  1472                 out.append(vars[j]);

  1473             }

  1474         }

  1475         out.append(");");

  1476         i += 2;

  1477         addReference(in);

  1478         return i;

  1479     }

  1480     private int invokeVirtualMethod(byte[] byteCodes, int i, final StackMapper mapper)

  1481     throws IOException {

  1482         int methodIndex = readIntArg(byteCodes, i);

  1483         String[] mi = jc.getFieldInfoName(methodIndex);

  1484         char[] returnType = { 'V' };

  1485         StringBuilder cnt = new StringBuilder();

  1486         String mn = findMethodName(mi, cnt, returnType);

  1488         final int numArguments = cnt.length() + 1;

  1489         final Variable[] vars = new Variable[numArguments];

  1491         for (int j = numArguments - 1; j >= 0; --j) {

  1492             vars[j] = mapper.pop();

  1493         }

  1495         if (returnType[0] != 'V') {

  1496             out.append("var ")

  1497                .append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1498                .append(" = ");

  1499         }

  1501         out.append(vars[0]).append('.');

  1502         out.append(mn);

  1503         out.append('(');

  1504         String sep = "";

  1505         for (int j = 1; j < numArguments; ++j) {

  1506             out.append(sep);

  1507             out.append(vars[j]);

  1508             sep = ", ";

  1509         }

  1510         out.append(");");

  1511         i += 2;

  1512         return i;

  1513     }

  1515     private void addReference(String cn) throws IOException {

  1516         if (requireReference(cn)) {

  1517             debug(" /* needs " + cn + " */");

  1518         }

  1519     }

  1521     private void outType(String d, StringBuilder out) {

  1522         int arr = 0;

  1523         while (d.charAt(0) == '[') {

  1524             out.append('A');

  1525             d = d.substring(1);

  1526         }

  1527         if (d.charAt(0) == 'L') {

  1528             assert d.charAt(d.length() - 1) == ';';

  1529             out.append(d.replace('/', '_').substring(0, d.length() - 1));

  1530         } else {

  1531             out.append(d);

  1532         }

  1533     }

  1535     private String encodeConstant(int entryIndex) throws IOException {

  1536         String[] classRef = { null };

  1537         String s = jc.stringValue(entryIndex, classRef);

  1538         if (classRef[0] != null) {

  1539             if (classRef[0].startsWith("[")) {

  1540                 s = accessClass("java_lang_Class") + "(false).forName__Ljava_lang_Class_2Ljava_lang_String_2('" + classRef[0] + "');";

  1541             } else {

  1542                 addReference(classRef[0]);

  1543                 s = accessClass(s.replace('/', '_')) + "(false).constructor.$class";

  1544             }

  1545         }

  1546         return s;

  1547     }

  1549     private String javaScriptBody(String prefix, MethodData m, boolean isStatic) throws IOException {

  1550         byte[] arr = m.findAnnotationData(true);

  1551         if (arr == null) {

  1552             return null;

  1553         }

  1554         final String jvmType = "Lorg/apidesign/bck2brwsr/core/JavaScriptBody;";

  1555         class P extends AnnotationParser {

  1556             public P() {

  1557                 super(false, true);

  1558             }

  1560             int cnt;

  1561             String[] args = new String[30];

  1562             String body;

  1564             @Override

  1565             protected void visitAttr(String type, String attr, String at, String value) {

  1566                 if (type.equals(jvmType)) {

  1567                     if ("body".equals(attr)) {

  1568                         body = value;

  1569                     } else if ("args".equals(attr)) {

  1570                         args[cnt++] = value;

  1571                     } else {

  1572                         throw new IllegalArgumentException(attr);

  1573                     }

  1574                 }

  1575             }

  1576         }

  1577         P p = new P();

  1578         p.parse(arr, jc);

  1579         if (p.body == null) {

  1580             return null;

  1581         }

  1582         StringBuilder cnt = new StringBuilder();

  1583         final String mn = findMethodName(m, cnt);

  1584         out.append(prefix).append(mn);

  1585         out.append(" = function(");

  1586         String space = "";

  1587         int index = 0;

  1588         for (int i = 0; i < cnt.length(); i++) {

  1589             out.append(space);

  1590             space = outputArg(out, p.args, index);

  1591             index++;

  1592         }

  1593         out.append(") {").append("\n");

  1594         out.append(p.body);

  1595         out.append("\n}\n");

  1596         return mn;

  1597     }

  1598     private static String className(ClassData jc) {

  1599         //return jc.getName().getInternalName().replace('/', '_');

  1600         return jc.getClassName().replace('/', '_');

  1601     }

  1603     private static String[] findAnnotation(

  1604         byte[] arr, ClassData cd, final String className,

  1605         final String... attrNames

  1606     ) throws IOException {

  1607         if (arr == null) {

  1608             return null;

  1609         }

  1610         final String[] values = new String[attrNames.length];

  1611         final boolean[] found = { false };

  1612         final String jvmType = "L" + className.replace('.', '/') + ";";

  1613         AnnotationParser ap = new AnnotationParser(false, true) {

  1614             @Override

  1615             protected void visitAttr(String type, String attr, String at, String value) {

  1616                 if (type.equals(jvmType)) {

  1617                     found[0] = true;

  1618                     for (int i = 0; i < attrNames.length; i++) {

  1619                         if (attrNames[i].equals(attr)) {

  1620                             values[i] = value;

  1621                         }

  1622                     }

  1623                 }

  1624             }

  1626         };

  1627         ap.parse(arr, cd);

  1628         return found[0] ? values : null;

  1629     }

  1631     private CharSequence initField(FieldData v) {

  1632         final String is = v.getInternalSig();

  1633         if (is.length() == 1) {

  1634             switch (is.charAt(0)) {

  1635                 case 'S':

  1636                 case 'J':

  1637                 case 'B':

  1638                 case 'Z':

  1639                 case 'C':

  1640                 case 'I': return " = 0;";

  1641                 case 'F':

  1642                 case 'D': return " = 0.0;";

  1643                 default:

  1644                     throw new IllegalStateException(is);

  1645             }

  1646         }

  1647         return " = null;";

  1648     }

  1650     private void generateAnno(ClassData cd, final Appendable out, byte[] data) throws IOException {

  1651         AnnotationParser ap = new AnnotationParser(true, false) {

  1652             int[] cnt = new int[32];

  1653             int depth;

  1655             @Override

  1656             protected void visitAnnotationStart(String attrType, boolean top) throws IOException {

  1657                 final String slashType = attrType.substring(1, attrType.length() - 1);

  1658                 requireReference(slashType);

  1660                 if (cnt[depth]++ > 0) {

  1661                     out.append(",");

  1662                 }

  1663                 if (top) {

  1664                     out.append('"').append(attrType).append("\" : ");

  1665                 }

  1666                 out.append("{\n");

  1667                 cnt[++depth] = 0;

  1668             }

  1670             @Override

  1671             protected void visitAnnotationEnd(String type, boolean top) throws IOException {

  1672                 out.append("\n}\n");

  1673                 depth--;

  1674             }

  1676             @Override

  1677             protected void visitValueStart(String attrName, char type) throws IOException {

  1678                 if (cnt[depth]++ > 0) {

  1679                     out.append(",\n");

  1680                 }

  1681                 cnt[++depth] = 0;

  1682                 if (attrName != null) {

  1683                     out.append(attrName).append(" : ");

  1684                 }

  1685                 if (type == '[') {

  1686                     out.append("[");

  1687                 }

  1688             }

  1690             @Override

  1691             protected void visitValueEnd(String attrName, char type) throws IOException {

  1692                 if (type == '[') {

  1693                     out.append("]");

  1694                 }

  1695                 depth--;

  1696             }

  1698             @Override

  1699             protected void visitAttr(String type, String attr, String attrType, String value)

  1700             throws IOException {

  1701                 if (attr == null && value == null) {

  1702                     return;

  1703                 }

  1704                 out.append(value);

  1705             }

  1707             @Override

  1708             protected void visitEnumAttr(String type, String attr, String attrType, String value)

  1709             throws IOException {

  1710                 final String slashType = attrType.substring(1, attrType.length() - 1);

  1711                 requireReference(slashType);

  1713                 out.append(accessClass(slashType.replace('/', '_')))

  1714                    .append("(false).constructor.").append(value);

  1715             }

  1716         };

  1717         ap.parse(data, cd);

  1718     }

  1720     private static String outputArg(Appendable out, String[] args, int indx) throws IOException {

  1721         final String name = args[indx];

  1722         if (name == null) {

  1723             return "";

  1724         }

  1725         if (name.contains(",")) {

  1726             throw new IOException("Wrong parameter with ',': " + name);

  1727         }

  1728         out.append(name);

  1729         return ",";

  1730     }

  1732     private static void emit(final Appendable out,

  1733                              final String format,

  1734                              final CharSequence... params) throws IOException {

  1735         final int length = format.length();

  1737         int processed = 0;

  1738         int paramOffset = format.indexOf('@');

  1739         while ((paramOffset != -1) && (paramOffset < (length - 1))) {

  1740             final char paramChar = format.charAt(paramOffset + 1);

  1741             if ((paramChar >= '1') && (paramChar <= '9')) {

  1742                 final int paramIndex = paramChar - '0' - 1;

  1744                 out.append(format, processed, paramOffset);

  1745                 out.append(params[paramIndex]);

  1747                 ++paramOffset;

  1748                 processed = paramOffset + 1;

  1749             }

  1751             paramOffset = format.indexOf('@', paramOffset + 1);

  1752         }

  1754         out.append(format, processed, length);

  1755     }

  1757     private void generateCatch(TrapData[] traps, int current, int topMostLabel) throws IOException {

  1758         out.append("} catch (e) {\n");

  1759         int finallyPC = -1;

  1760         for (TrapData e : traps) {

  1761             if (e == null) {

  1762                 break;

  1763             }

  1764             if (e.catch_cpx != 0) { //not finally

  1765                 final String classInternalName = jc.getClassName(e.catch_cpx);

  1766                 addReference(classInternalName);

  1767                 if ("java/lang/Throwable".equals(classInternalName)) {

  1768                     out.append("if (e.$instOf_java_lang_Throwable) {");

  1769                     out.append("  var stA0 = e;");

  1770                     out.append("} else {");

  1771                     out.append("  var stA0 = vm.java_lang_Throwable(true);");

  1772                     out.append("  vm.java_lang_Throwable.cons__VLjava_lang_String_2.call(stA0, e.toString());");

  1773                     out.append("}");

  1774                     goTo(out, current, e.handler_pc, topMostLabel);

  1775                 } else {

  1776                     out.append("if (e.$instOf_" + classInternalName.replace('/', '_') + ") {");

  1777                     out.append("var stA0 = e;");

  1778                     goTo(out, current, e.handler_pc, topMostLabel);

  1779                     out.append("}\n");

  1780                 }

  1781             } else {

  1782                 finallyPC = e.handler_pc;

  1783             }

  1784         }

  1785         if (finallyPC == -1) {

  1786             out.append("throw e;");

  1787         } else {

  1788             out.append("var stA0 = e;");

  1789             goTo(out, current, finallyPC, topMostLabel);

  1790         }

  1791         out.append("\n}");

  1792     }

  1794     private static void goTo(Appendable out, int current, int to, int canBack) throws IOException {

  1795         if (to < current) {

  1796             if (canBack < to) {

  1797                 out.append("{ gt = 0; continue X_" + to + "; }");

  1798             } else {

  1799                 out.append("{ gt = " + to + "; continue X_0; }");

  1800             }

  1801         } else {

  1802             out.append("{ gt = " + to + "; break IF; }");

  1803         }

  1804     }

  1806     private static void emitIf(

  1807         Appendable out, String pattern, Variable param,

  1808         int current, int to, int canBack

  1809     ) throws IOException {

  1810         emit(out, pattern, param);

  1811         goTo(out, current, to, canBack);

  1812     }

  1814     private void generateNewArray(int atype, final StackMapper smapper) throws IOException, IllegalStateException {

  1815         String jvmType;

  1816         switch (atype) {

  1817             case 4: jvmType = "[Z"; break;

  1818             case 5: jvmType = "[C"; break;

  1819             case 6: jvmType = "[F"; break;

  1820             case 7: jvmType = "[D"; break;

  1821             case 8: jvmType = "[B"; break;

  1822             case 9: jvmType = "[S"; break;

  1823             case 10: jvmType = "[I"; break;

  1824             case 11: jvmType = "[J"; break;

  1825             default: throw new IllegalStateException("Array type: " + atype);

  1826         }

  1827         emit(out, "var @2 = Array.prototype.newArray__Ljava_lang_Object_2ZLjava_lang_String_2I(true, '@3', @1);",

  1828              smapper.popI(), smapper.pushA(), jvmType);

  1829     }

  1831     private void generateANewArray(int type, final StackMapper smapper) throws IOException {

  1832         String typeName = jc.getClassName(type);

  1833         if (typeName.startsWith("[")) {

  1834             typeName = "[" + typeName;

  1835         } else {

  1836             typeName = "[L" + typeName + ";";

  1837         }

  1838         emit(out, "var @2 = Array.prototype.newArray__Ljava_lang_Object_2ZLjava_lang_String_2I(false, '@3', @1);",

  1839              smapper.popI(), smapper.pushA(), typeName);

  1840     }

  1842     private int generateMultiANewArray(int type, final byte[] byteCodes, int i, final StackMapper smapper) throws IOException {

  1843         String typeName = jc.getClassName(type);

  1844         int dim = readUByte(byteCodes, ++i);

  1845         StringBuilder dims = new StringBuilder();

  1846         dims.append('[');

  1847         for (int d = 0; d < dim; d++) {

  1848             if (d != 0) {

  1849                 dims.insert(1, ",");

  1850             }

  1851             dims.insert(1, smapper.popI());

  1852         }

  1853         dims.append(']');

  1854         emit(out, "var @2 = Array.prototype.multiNewArray__Ljava_lang_Object_2Ljava_lang_String_2_3II('@3', @1, 0);",

  1855              dims.toString(), smapper.pushA(), typeName);

  1856         return i;

  1857     }

  1859     private int generateTableSwitch(int i, final byte[] byteCodes, final StackMapper smapper, int topMostLabel) throws IOException {

  1860         int table = i / 4 * 4 + 4;

  1861         int dflt = i + readInt4(byteCodes, table);

  1862         table += 4;

  1863         int low = readInt4(byteCodes, table);

  1864         table += 4;

  1865         int high = readInt4(byteCodes, table);

  1866         table += 4;

  1867         out.append("switch (").append(smapper.popI()).append(") {\n");

  1868         while (low <= high) {

  1869             int offset = i + readInt4(byteCodes, table);

  1870             table += 4;

  1871             out.append("  case " + low).append(":"); goTo(out, i, offset, topMostLabel); out.append('\n');

  1872             low++;

  1873         }

  1874         out.append("  default: ");

  1875         goTo(out, i, dflt, topMostLabel);

  1876         out.append("\n}");

  1877         i = table - 1;

  1878         return i;

  1879     }

  1881     private int generateLookupSwitch(int i, final byte[] byteCodes, final StackMapper smapper, int topMostLabel) throws IOException {

  1882         int table = i / 4 * 4 + 4;

  1883         int dflt = i + readInt4(byteCodes, table);

  1884         table += 4;

  1885         int n = readInt4(byteCodes, table);

  1886         table += 4;

  1887         out.append("switch (").append(smapper.popI()).append(") {\n");

  1888         while (n-- > 0) {

  1889             int cnstnt = readInt4(byteCodes, table);

  1890             table += 4;

  1891             int offset = i + readInt4(byteCodes, table);

  1892             table += 4;

  1893             out.append("  case " + cnstnt).append(": "); goTo(out, i, offset, topMostLabel); out.append('\n');

  1894         }

  1895         out.append("  default: ");

  1896         goTo(out, i, dflt, topMostLabel);

  1897         out.append("\n}");

  1898         i = table - 1;

  1899         return i;

  1900     }

  1902     private void generateInstanceOf(int indx, final StackMapper smapper) throws IOException {

  1903         final String type = jc.getClassName(indx);

  1904         if (!type.startsWith("[")) {

  1905             emit(out, "var @2 = @1 != null && @1.$instOf_@3 ? 1 : 0;",

  1906                  smapper.popA(), smapper.pushI(),

  1907                  type.replace('/', '_'));

  1908         } else {

  1909             emit(out, "var @2 = vm.java_lang_Class(false).forName__Ljava_lang_Class_2Ljava_lang_String_2('@3').isInstance__ZLjava_lang_Object_2(@1);",

  1910                 smapper.popA(), smapper.pushI(),

  1911                 type

  1912             );

  1913         }

  1914     }

  1916     private void generateCheckcast(int indx, final StackMapper smapper) throws IOException {

  1917         final String type = jc.getClassName(indx);

  1918         if (!type.startsWith("[")) {

  1919             emit(out,

  1920                  "if (@1 !== null && !@1.$instOf_@2) throw {};",

  1921                  smapper.getA(0), type.replace('/', '_'));

  1922         } else {

  1923             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);",

  1924                  smapper.getA(0), type

  1925             );

  1926         }

  1927     }

  1929     private void generateByteCodeComment(int prev, int i, final byte[] byteCodes) throws IOException {

  1930         for (int j = prev; j <= i; j++) {

  1931             out.append(" ");

  1932             final int cc = readUByte(byteCodes, j);

  1933             out.append(Integer.toString(cc));

  1934         }

  1935     }

  1936 }

author	Lubomir Nerad <lubomir.nerad@oracle.com>
	Tue, 19 Mar 2013 13:18:02 +0100
branch	closure
changeset 861	f41a1fef7738
parent 848	677c9bcf507f
parent 843	140c739c607f
child 869	151f4ccd7673
permissions	-rw-r--r--