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vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java
author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
Mon, 14 Jan 2013 11:30:56 +0100
branchUseFunctionCall
changeset 443 9359b006782b
parent 442 b107ed66f2e7
child 448 ac05de5a8786
permissions -rw-r--r--
Using 'this' in @JavaScriptBody instance methods 
     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;

    19 

    20 import java.io.IOException;

    21 import java.io.InputStream;

    22 import org.apidesign.javap.AnnotationParser;

    23 import org.apidesign.javap.ClassData;

    24 import org.apidesign.javap.FieldData;

    25 import org.apidesign.javap.MethodData;

    26 import org.apidesign.javap.StackMapIterator;

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

    28 import org.apidesign.javap.TrapData;

    29 import org.apidesign.javap.TrapDataIterator;

    30 

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

    32  *

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

    34  */

    35 abstract class ByteCodeToJavaScript {

    36     private ClassData jc;

    37     final Appendable out;

    38 

    39     protected ByteCodeToJavaScript(Appendable out) {

    40         this.out = out;

    41     }

    42     

    43     /* Collects additional required resources.

    44      * 

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

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

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

    48      */

    49     protected abstract boolean requireReference(String internalClassName);

    50     

    51     /*

    52      * @param resourcePath name of resources to read

    53      */

    54     protected abstract void requireScript(String resourcePath);

    55     

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

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

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

    59      * 

    60      * @param className suggested name of the class

    61      */

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

    63         return className + " = ";

    64     }

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

    66         return classOperation;

    67     }

    68     

    69     /** Prints out a debug message. 

    70      * 

    71      * @param msg the message

    72      * @return true if the message has been printed

    73      * @throws IOException 

    74      */

    75     boolean debug(String msg) throws IOException {

    76         out.append(msg);

    77         return true;

    78     }

    79 

    80     /**

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

    82      *

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

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

    85      * 

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

    87      */

    88     

    89     public String compile(InputStream classFile) throws IOException {

    90         this.jc = new ClassData(classFile);

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

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

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

    94             );

    95         }

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

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

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

    99             "resource", "processByteCode"

   100         );

   101         if (arr != null) {

   102             requireScript(arr[0]);

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

   104                 return null;

   105             }

   106         }

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

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

   109             "container", "prototype"

   110         );

   111         StringArray toInitilize = new StringArray();

   112         final String className = className(jc);

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

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

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

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

   117             if (v.isStatic()) {

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

   119             }

   120         }

   121         if (proto == null) {

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

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

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

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

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

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

   128         } else {

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

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

   131                 proto[0] = "p";

   132             }

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

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

   135         }

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

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

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

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

   140                 "name", "value"

   141             );

   142             if (only != null) {

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

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

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

   146                 }

   147                 continue;

   148             }

   149             String prefix;

   150             String mn;

   151             if (m.isStatic()) {

   152                 prefix = "\n    c.";

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

   154             } else {

   155                 if (m.isConstructor()) {

   156                     prefix = "\n    CLS.";

   157                     mn = generateInstanceMethod(prefix, m);

   158                 } else {

   159                     prefix = "\n    c.";

   160                     mn = generateInstanceMethod(prefix, m);

   161                 }

   162             }

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

   164             if (runAnno != null) {

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

   166                 generateAnno(jc, out, runAnno);

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

   168             }

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

   170         }

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

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

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

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

   175         }

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

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

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

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

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

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

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

   183         if (classAnno != null) {

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

   185             generateAnno(jc, out, classAnno);

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

   187         }

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

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

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

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

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

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

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

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

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

   197                 "name", "value"

   198             );

   199             if (only != null) {

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

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

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

   203                 }

   204                 continue;

   205             }

   206             if (!v.isStatic()) {

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

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

   209             }

   210         }

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

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

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

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

   215         StringBuilder sb = new StringBuilder();

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

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

   218         }

   219         return sb.toString();

   220     }

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

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

   223         if (jsb != null) {

   224             return jsb;

   225         }

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

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

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

   229         }

   230         generateMethod(prefix, mn, m);

   231         return mn;

   232     }

   233 

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

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

   236         if (jsb != null) {

   237             return jsb;

   238         }

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

   240         generateMethod(prefix, mn, m);

   241         return mn;

   242     }

   243 

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

   245             throws IOException {

   246         final StackMapIterator stackMapIterator = m.createStackMapIterator();

   247         TrapDataIterator trap = m.getTrapDataIterator();

   248         final LocalsMapper lmapper =

   249                 new LocalsMapper(stackMapIterator.getArguments());

   250 

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

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

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

   254 

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

   256         if (byteCodes == null) {

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

   258                .append(jc.getClassName()).append('.')

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

   260             out.append("};");

   261             return;

   262         }

   263 

   264         final StackMapper smapper = new StackMapper();

   265 

   266         final int maxLocals = m.getMaxLocals();

   267         if (maxLocals > 0) {

   268             // TODO: generate only used local variables

   269             for (int j = 0; j <= VarType.LAST; ++j) {

   270                 out.append("\n  var ").append(Variable.getLocalVariable(j, 0));

   271                 for (int i = 1; i < maxLocals; ++i) {

   272                     out.append(", ");

   273                     out.append(Variable.getLocalVariable(j, i));

   274                 }

   275                 out.append(';');

   276             }

   277         }

   278         if (!m.isStatic()) {

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

   280         }

   281 

   282         // maxStack includes two stack positions for every pushed long / double

   283         // so this might generate more stack variables than we need

   284         final int maxStack = m.getMaxStack();

   285         if (maxStack > 0) {

   286             // TODO: generate only used stack variables

   287             for (int j = 0; j <= VarType.LAST; ++j) {

   288                 out.append("\n  var ").append(Variable.getStackVariable(j, 0));

   289                 for (int i = 1; i < maxStack; ++i) {

   290                     out.append(", ");

   291                     out.append(Variable.getStackVariable(j, i));

   292                 }

   293                 out.append(';');

   294             }

   295         }

   296 

   297         int lastStackFrame = -1;

   298         TrapData[] previousTrap = null;

   299         

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

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

   302             int prev = i;

   303             stackMapIterator.advanceTo(i);

   304             boolean changeInCatch = trap.advanceTo(i);

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

   306                 if (previousTrap != null) {

   307                     generateCatch(previousTrap);

   308                     previousTrap = null;

   309                 }

   310             }

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

   312                 lastStackFrame = stackMapIterator.getFrameIndex();

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

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

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

   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 = readByte(byteCodes, i);

   325             switch (c) {

   326                 case opc_aload_0:

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

   328                     break;

   329                 case opc_iload_0:

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

   331                     break;

   332                 case opc_lload_0:

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

   334                     break;

   335                 case opc_fload_0:

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

   337                     break;

   338                 case opc_dload_0:

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

   340                     break;

   341                 case opc_aload_1:

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

   343                     break;

   344                 case opc_iload_1:

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

   346                     break;

   347                 case opc_lload_1:

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

   349                     break;

   350                 case opc_fload_1:

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

   352                     break;

   353                 case opc_dload_1:

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

   355                     break;

   356                 case opc_aload_2:

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

   358                     break;

   359                 case opc_iload_2:

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

   361                     break;

   362                 case opc_lload_2:

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

   364                     break;

   365                 case opc_fload_2:

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

   367                     break;

   368                 case opc_dload_2:

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

   370                     break;

   371                 case opc_aload_3:

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

   373                     break;

   374                 case opc_iload_3:

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

   376                     break;

   377                 case opc_lload_3:

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

   379                     break;

   380                 case opc_fload_3:

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

   382                     break;

   383                 case opc_dload_3:

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

   385                     break;

   386                 case opc_iload: {

   387                     final int indx = readByte(byteCodes, ++i);

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

   389                     break;

   390                 }

   391                 case opc_lload: {

   392                     final int indx = readByte(byteCodes, ++i);

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

   394                     break;

   395                 }

   396                 case opc_fload: {

   397                     final int indx = readByte(byteCodes, ++i);

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

   399                     break;

   400                 }

   401                 case opc_dload: {

   402                     final int indx = readByte(byteCodes, ++i);

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

   404                     break;

   405                 }

   406                 case opc_aload: {

   407                     final int indx = readByte(byteCodes, ++i);

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

   409                     break;

   410                 }

   411                 case opc_istore: {

   412                     final int indx = readByte(byteCodes, ++i);

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

   414                     break;

   415                 }

   416                 case opc_lstore: {

   417                     final int indx = readByte(byteCodes, ++i);

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

   419                     break;

   420                 }

   421                 case opc_fstore: {

   422                     final int indx = readByte(byteCodes, ++i);

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

   424                     break;

   425                 }

   426                 case opc_dstore: {

   427                     final int indx = readByte(byteCodes, ++i);

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

   429                     break;

   430                 }

   431                 case opc_astore: {

   432                     final int indx = readByte(byteCodes, ++i);

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

   434                     break;

   435                 }

   436                 case opc_astore_0:

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

   438                     break;

   439                 case opc_istore_0:

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

   441                     break;

   442                 case opc_lstore_0:

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

   444                     break;

   445                 case opc_fstore_0:

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

   447                     break;

   448                 case opc_dstore_0:

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

   450                     break;

   451                 case opc_astore_1:

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

   453                     break;

   454                 case opc_istore_1:

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

   456                     break;

   457                 case opc_lstore_1:

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

   459                     break;

   460                 case opc_fstore_1:

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

   462                     break;

   463                 case opc_dstore_1:

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

   465                     break;

   466                 case opc_astore_2:

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

   468                     break;

   469                 case opc_istore_2:

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

   471                     break;

   472                 case opc_lstore_2:

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

   474                     break;

   475                 case opc_fstore_2:

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

   477                     break;

   478                 case opc_dstore_2:

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

   480                     break;

   481                 case opc_astore_3:

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

   483                     break;

   484                 case opc_istore_3:

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

   486                     break;

   487                 case opc_lstore_3:

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

   489                     break;

   490                 case opc_fstore_3:

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

   492                     break;

   493                 case opc_dstore_3:

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

   495                     break;

   496                 case opc_iadd:

   497                     emit(out, "@1 = (@1 + @2) | 0;", smapper.getI(1), smapper.popI());

   498                     break;

   499                 case opc_ladd:

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

   501                     break;

   502                 case opc_fadd:

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

   504                     break;

   505                 case opc_dadd:

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

   507                     break;

   508                 case opc_isub:

   509                     emit(out, "@1 = (@1 - @2) | 0;", smapper.getI(1), smapper.popI());

   510                     break;

   511                 case opc_lsub:

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

   513                     break;

   514                 case opc_fsub:

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

   516                     break;

   517                 case opc_dsub:

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

   519                     break;

   520                 case opc_imul:

   521                     emit(out, "@1 = (((@1 * (@2 >> 16)) << 16) + @1 * (@2 & 0xFFFF)) | 0;", smapper.getI(1), smapper.popI());

   522                     break;

   523                 case opc_lmul:

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

   525                     break;

   526                 case opc_fmul:

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

   528                     break;

   529                 case opc_dmul:

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

   531                     break;

   532                 case opc_idiv:

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

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

   535                     break;

   536                 case opc_ldiv:

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

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

   539                     break;

   540                 case opc_fdiv:

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

   542                     break;

   543                 case opc_ddiv:

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

   545                     break;

   546                 case opc_irem:

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

   548                     break;

   549                 case opc_lrem:

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

   551                     break;

   552                 case opc_frem:

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

   554                     break;

   555                 case opc_drem:

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

   557                     break;

   558                 case opc_iand:

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

   560                     break;

   561                 case opc_land:

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

   563                     break;

   564                 case opc_ior:

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

   566                     break;

   567                 case opc_lor:

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

   569                     break;

   570                 case opc_ixor:

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

   572                     break;

   573                 case opc_lxor:

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

   575                     break;

   576                 case opc_ineg:

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

   578                     break;

   579                 case opc_lneg:

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

   581                     break;

   582                 case opc_fneg:

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

   584                     break;

   585                 case opc_dneg:

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

   587                     break;

   588                 case opc_ishl:

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

   590                     break;

   591                 case opc_lshl:

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

   593                     break;

   594                 case opc_ishr:

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

   596                     break;

   597                 case opc_lshr:

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

   599                     break;

   600                 case opc_iushr:

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

   602                     break;

   603                 case opc_lushr:

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

   605                     break;

   606                 case opc_iinc: {

   607                     final int varIndx = readByte(byteCodes, ++i);

   608                     final int incrBy = byteCodes[++i];

   609                     if (incrBy == 1) {

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

   611                     } else {

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

   613                              lmapper.getI(varIndx),

   614                              Integer.toString(incrBy));

   615                     }

   616                     break;

   617                 }

   618                 case opc_return:

   619                     emit(out, "return;");

   620                     break;

   621                 case opc_ireturn:

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

   623                     break;

   624                 case opc_lreturn:

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

   626                     break;

   627                 case opc_freturn:

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

   629                     break;

   630                 case opc_dreturn:

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

   632                     break;

   633                 case opc_areturn:

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

   635                     break;

   636                 case opc_i2l:

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

   638                     break;

   639                 case opc_i2f:

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

   641                     break;

   642                 case opc_i2d:

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

   644                     break;

   645                 case opc_l2i:

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

   647                     break;

   648                     // max int check?

   649                 case opc_l2f:

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

   651                     break;

   652                 case opc_l2d:

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

   654                     break;

   655                 case opc_f2d:

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

   657                     break;

   658                 case opc_d2f:

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

   660                     break;

   661                 case opc_f2i:

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

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

   664                     break;

   665                 case opc_f2l:

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

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

   668                     break;

   669                 case opc_d2i:

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

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

   672                     break;

   673                 case opc_d2l:

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

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

   676                     break;

   677                 case opc_i2b:

   678                 case opc_i2c:

   679                 case opc_i2s:

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

   681                     break;

   682                 case opc_aconst_null:

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

   684                     break;

   685                 case opc_iconst_m1:

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

   687                     break;

   688                 case opc_iconst_0:

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

   690                     break;

   691                 case opc_dconst_0:

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

   693                     break;

   694                 case opc_lconst_0:

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

   696                     break;

   697                 case opc_fconst_0:

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

   699                     break;

   700                 case opc_iconst_1:

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

   702                     break;

   703                 case opc_lconst_1:

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

   705                     break;

   706                 case opc_fconst_1:

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

   708                     break;

   709                 case opc_dconst_1:

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

   711                     break;

   712                 case opc_iconst_2:

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

   714                     break;

   715                 case opc_fconst_2:

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

   717                     break;

   718                 case opc_iconst_3:

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

   720                     break;

   721                 case opc_iconst_4:

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

   723                     break;

   724                 case opc_iconst_5:

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

   726                     break;

   727                 case opc_ldc: {

   728                     int indx = readByte(byteCodes, ++i);

   729                     String v = encodeConstant(indx);

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

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

   732                     break;

   733                 }

   734                 case opc_ldc_w:

   735                 case opc_ldc2_w: {

   736                     int indx = readIntArg(byteCodes, i);

   737                     i += 2;

   738                     String v = encodeConstant(indx);

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

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

   741                     break;

   742                 }

   743                 case opc_lcmp:

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

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

   746                     break;

   747                 case opc_fcmpl:

   748                 case opc_fcmpg:

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

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

   751                     break;

   752                 case opc_dcmpl:

   753                 case opc_dcmpg:

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

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

   756                     break;

   757                 case opc_if_acmpeq:

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

   759                                    "===");

   760                     break;

   761                 case opc_if_acmpne:

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

   763                                    "!=");

   764                     break;

   765                 case opc_if_icmpeq:

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

   767                                    "==");

   768                     break;

   769                 case opc_ifeq: {

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

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

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

   773                     i += 2;

   774                     break;

   775                 }

   776                 case opc_ifne: {

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

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

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

   780                     i += 2;

   781                     break;

   782                 }

   783                 case opc_iflt: {

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

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

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

   787                     i += 2;

   788                     break;

   789                 }

   790                 case opc_ifle: {

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

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

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

   794                     i += 2;

   795                     break;

   796                 }

   797                 case opc_ifgt: {

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

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

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

   801                     i += 2;

   802                     break;

   803                 }

   804                 case opc_ifge: {

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

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

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

   808                     i += 2;

   809                     break;

   810                 }

   811                 case opc_ifnonnull: {

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

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

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

   815                     i += 2;

   816                     break;

   817                 }

   818                 case opc_ifnull: {

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

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

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

   822                     i += 2;

   823                     break;

   824                 }

   825                 case opc_if_icmpne:

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

   827                                    "!=");

   828                     break;

   829                 case opc_if_icmplt:

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

   831                                    "<");

   832                     break;

   833                 case opc_if_icmple:

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

   835                                    "<=");

   836                     break;

   837                 case opc_if_icmpgt:

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

   839                                    ">");

   840                     break;

   841                 case opc_if_icmpge:

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

   843                                    ">=");

   844                     break;

   845                 case opc_goto: {

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

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

   848                     i += 2;

   849                     break;

   850                 }

   851                 case opc_lookupswitch: {

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

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

   854                     table += 4;

   855                     int n = readInt4(byteCodes, table);

   856                     table += 4;

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

   858                     while (n-- > 0) {

   859                         int cnstnt = readInt4(byteCodes, table);

   860                         table += 4;

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

   862                         table += 4;

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

   864                     }

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

   866                     i = table - 1;

   867                     break;

   868                 }

   869                 case opc_tableswitch: {

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

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

   872                     table += 4;

   873                     int low = readInt4(byteCodes, table);

   874                     table += 4;

   875                     int high = readInt4(byteCodes, table);

   876                     table += 4;

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

   878                     while (low <= high) {

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

   880                         table += 4;

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

   882                         low++;

   883                     }

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

   885                     i = table - 1;

   886                     break;

   887                 }

   888                 case opc_invokeinterface: {

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

   890                     break;

   891                 }

   892                 case opc_invokevirtual:

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

   894                     break;

   895                 case opc_invokespecial:

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

   897                     break;

   898                 case opc_invokestatic:

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

   900                     break;

   901                 case opc_new: {

   902                     int indx = readIntArg(byteCodes, i);

   903                     String ci = jc.getClassName(indx);

   904                     emit(out, "@1 = new @2;",

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

   906                     addReference(ci);

   907                     i += 2;

   908                     break;

   909                 }

   910                 case opc_newarray:

   911                     ++i; // skip type of array

   912                     emit(out, "@2 = new Array(@1).fillNulls();",

   913                          smapper.popI(), smapper.pushA());

   914                     break;

   915                 case opc_anewarray:

   916                     i += 2; // skip type of array

   917                     emit(out, "@2 = new Array(@1).fillNulls();",

   918                          smapper.popI(), smapper.pushA());

   919                     break;

   920                 case opc_multianewarray: {

   921                     i += 2;

   922                     int dim = readByte(byteCodes, ++i);

   923                     out.append("{ var a0 = new Array(").append(smapper.popI())

   924                        .append(").fillNulls();");

   925                     for (int d = 1; d < dim; d++) {

   926                         out.append("\n  var l" + d).append(" = ")

   927                            .append(smapper.popI()).append(';');

   928                         out.append("\n  for (var i" + d).append (" = 0; i" + d).

   929                             append(" < a" + (d - 1)).

   930                             append(".length; i" + d).append("++) {");

   931                         out.append("\n    var a" + d).

   932                             append (" = new Array(l" + d).append(").fillNulls();");

   933                         out.append("\n    a" + (d - 1)).append("[i" + d).append("] = a" + d).

   934                             append(";");

   935                     }

   936                     for (int d = 1; d < dim; d++) {

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

   938                     }

   939                     out.append("\n").append(smapper.pushA()).append(" = a0; }");

   940                     break;

   941                 }

   942                 case opc_arraylength:

   943                     emit(out, "@2 = @1.length;", smapper.popA(), smapper.pushI());

   944                     break;

   945                 case opc_lastore:

   946                     emit(out, "@3[@2] = @1;",

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

   948                     break;

   949                 case opc_fastore:

   950                     emit(out, "@3[@2] = @1;",

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

   952                     break;

   953                 case opc_dastore:

   954                     emit(out, "@3[@2] = @1;",

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

   956                     break;

   957                 case opc_aastore:

   958                     emit(out, "@3[@2] = @1;",

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

   960                     break;

   961                 case opc_iastore:

   962                 case opc_bastore:

   963                 case opc_castore:

   964                 case opc_sastore:

   965                     emit(out, "@3[@2] = @1;",

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

   967                     break;

   968                 case opc_laload:

   969                     emit(out, "@3 = @2[@1];",

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

   971                     break;

   972                 case opc_faload:

   973                     emit(out, "@3 = @2[@1];",

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

   975                     break;

   976                 case opc_daload:

   977                     emit(out, "@3 = @2[@1];",

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

   979                     break;

   980                 case opc_aaload:

   981                     emit(out, "@3 = @2[@1];",

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

   983                     break;

   984                 case opc_iaload:

   985                 case opc_baload:

   986                 case opc_caload:

   987                 case opc_saload:

   988                     emit(out, "@3 = @2[@1];",

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

   990                     break;

   991                 case opc_pop:

   992                 case opc_pop2:

   993                     smapper.pop(1);

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

   995                     break;

   996                 case opc_dup: {

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

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

   999                     break;

  1000                 }

  1001                 case opc_dup2: {

  1002                     if (smapper.get(0).isCategory2()) {

  1003                         final Variable v = smapper.get(0);

  1004                         emit(out, "@1 = @2;", smapper.pushT(v.getType()), v);

  1005                     } else {

  1006                         final Variable v1 = smapper.get(0);

  1007                         final Variable v2 = smapper.get(1);

  1008                         emit(out, "{ @1 = @2; @3 = @4; }",

  1009                              smapper.pushT(v2.getType()), v2,

  1010                              smapper.pushT(v1.getType()), v1);

  1011                     }

  1012                     break;

  1013                 }

  1014                 case opc_dup_x1: {

  1015                     final Variable vi1 = smapper.pop();

  1016                     final Variable vi2 = smapper.pop();

  1017                     final Variable vo3 = smapper.pushT(vi1.getType());

  1018                     final Variable vo2 = smapper.pushT(vi2.getType());

  1019                     final Variable vo1 = smapper.pushT(vi1.getType());

  1020 

  1021                     emit(out, "{ @1 = @2; @3 = @4; @5 = @6; }",

  1022                          vo1, vi1, vo2, vi2, vo3, vo1);

  1023                     break;

  1024                 }

  1025                 case opc_dup_x2: {

  1026                     if (smapper.get(1).isCategory2()) {

  1027                         final Variable vi1 = smapper.pop();

  1028                         final Variable vi2 = smapper.pop();

  1029                         final Variable vo3 = smapper.pushT(vi1.getType());

  1030                         final Variable vo2 = smapper.pushT(vi2.getType());

  1031                         final Variable vo1 = smapper.pushT(vi1.getType());

  1032 

  1033                         emit(out, "{ @1 = @2; @3 = @4; @5 = @6; }",

  1034                              vo1, vi1, vo2, vi2, vo3, vo1);

  1035                     } else {

  1036                         final Variable vi1 = smapper.pop();

  1037                         final Variable vi2 = smapper.pop();

  1038                         final Variable vi3 = smapper.pop();

  1039                         final Variable vo4 = smapper.pushT(vi1.getType());

  1040                         final Variable vo3 = smapper.pushT(vi3.getType());

  1041                         final Variable vo2 = smapper.pushT(vi2.getType());

  1042                         final Variable vo1 = smapper.pushT(vi1.getType());

  1043 

  1044                         emit(out, "{ @1 = @2; @3 = @4; @5 = @6; @7 = @8; }",

  1045                              vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);

  1046                     }

  1047                     break;

  1048                 }

  1049                 case opc_bipush:

  1050                     emit(out, "@1 = @2;",

  1051                          smapper.pushI(), Integer.toString(byteCodes[++i]));

  1052                     break;

  1053                 case opc_sipush:

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

  1055                          smapper.pushI(),

  1056                          Integer.toString(readIntArg(byteCodes, i)));

  1057                     i += 2;

  1058                     break;

  1059                 case opc_getfield: {

  1060                     int indx = readIntArg(byteCodes, i);

  1061                     String[] fi = jc.getFieldInfoName(indx);

  1062                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1063                     emit(out, "@2 = @1.fld_@3;",

  1064                          smapper.popA(), smapper.pushT(type), fi[1]);

  1065                     i += 2;

  1066                     break;

  1067                 }

  1068                 case opc_getstatic: {

  1069                     int indx = readIntArg(byteCodes, i);

  1070                     String[] fi = jc.getFieldInfoName(indx);

  1071                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1072                     emit(out, "@1 = @2(false).constructor.@3;",

  1073                          smapper.pushT(type),

  1074                          accessClass(fi[0].replace('/', '_')), fi[1]);

  1075                     i += 2;

  1076                     addReference(fi[0]);

  1077                     break;

  1078                 }

  1079                 case opc_putfield: {

  1080                     int indx = readIntArg(byteCodes, i);

  1081                     String[] fi = jc.getFieldInfoName(indx);

  1082                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1083                     emit(out, "@2.fld_@3 = @1;",

  1084                          smapper.popT(type), smapper.popA(), fi[1]);

  1085                     i += 2;

  1086                     break;

  1087                 }

  1088                 case opc_putstatic: {

  1089                     int indx = readIntArg(byteCodes, i);

  1090                     String[] fi = jc.getFieldInfoName(indx);

  1091                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1092                     emit(out, "@1(false).constructor.@2 = @3;",

  1093                          accessClass(fi[0].replace('/', '_')), fi[1],

  1094                          smapper.popT(type));

  1095                     i += 2;

  1096                     addReference(fi[0]);

  1097                     break;

  1098                 }

  1099                 case opc_checkcast: {

  1100                     int indx = readIntArg(byteCodes, i);

  1101                     final String type = jc.getClassName(indx);

  1102                     if (!type.startsWith("[")) {

  1103                         // no way to check arrays right now

  1104                         // XXX proper exception

  1105                         emit(out,

  1106                              "if (@1 !== null && !@1.$instOf_@2) throw {};",

  1107                              smapper.getA(0), type.replace('/', '_'));

  1108                     }

  1109                     i += 2;

  1110                     break;

  1111                 }

  1112                 case opc_instanceof: {

  1113                     int indx = readIntArg(byteCodes, i);

  1114                     final String type = jc.getClassName(indx);

  1115                     emit(out, "@2 = @1.$instOf_@3 ? 1 : 0;",

  1116                          smapper.popA(), smapper.pushI(),

  1117                          type.replace('/', '_'));

  1118                     i += 2;

  1119                     break;

  1120                 }

  1121                 case opc_athrow: {

  1122                     final Variable v = smapper.popA();

  1123                     smapper.clear();

  1124 

  1125                     emit(out, "{ @1 = @2; throw @2; }",

  1126                          smapper.pushA(), v);

  1127                     break;

  1128                 }

  1129 

  1130                 case opc_monitorenter: {

  1131                     out.append("/* monitor enter */");

  1132                     smapper.popA();

  1133                     break;

  1134                 }

  1135 

  1136                 case opc_monitorexit: {

  1137                     out.append("/* monitor exit */");

  1138                     smapper.popA();

  1139                     break;

  1140                 }

  1141 

  1142                 default: {

  1143                     emit(out, "throw 'unknown bytecode @1';",

  1144                          Integer.toString(c));

  1145                 }

  1146             }

  1147             if (debug(" //")) {

  1148                 for (int j = prev; j <= i; j++) {

  1149                     out.append(" ");

  1150                     final int cc = readByte(byteCodes, j);

  1151                     out.append(Integer.toString(cc));

  1152                 }

  1153             }

  1154             out.append("\n");            

  1155         }

  1156         if (previousTrap != null) {

  1157             generateCatch(previousTrap);

  1158         }

  1159         out.append("  }\n");

  1160         out.append("};");

  1161     }

  1162 

  1163     private int generateIf(byte[] byteCodes, int i,

  1164                            final Variable v2, final Variable v1,

  1165                            final String test) throws IOException {

  1166         int indx = i + readIntArg(byteCodes, i);

  1167         out.append("if (").append(v1)

  1168            .append(' ').append(test).append(' ')

  1169            .append(v2).append(") { gt = " + indx)

  1170            .append("; continue; }");

  1171         return i + 2;

  1172     }

  1173 

  1174     private int readIntArg(byte[] byteCodes, int offsetInstruction) {

  1175         final int indxHi = byteCodes[offsetInstruction + 1] << 8;

  1176         final int indxLo = byteCodes[offsetInstruction + 2];

  1177         return (indxHi & 0xffffff00) | (indxLo & 0xff);

  1178     }

  1179     private int readInt4(byte[] byteCodes, int offsetInstruction) {

  1180         final int d = byteCodes[offsetInstruction + 0] << 24;

  1181         final int c = byteCodes[offsetInstruction + 1] << 16;

  1182         final int b = byteCodes[offsetInstruction + 2] << 8;

  1183         final int a = byteCodes[offsetInstruction + 3];

  1184         return (d & 0xff000000) | (c & 0xff0000) | (b & 0xff00) | (a & 0xff);

  1185     }

  1186     private int readByte(byte[] byteCodes, int offsetInstruction) {

  1187         return byteCodes[offsetInstruction] & 0xff;

  1188     }

  1189     

  1190     private static void countArgs(String descriptor, char[] returnType, StringBuilder sig, StringBuilder cnt) {

  1191         int i = 0;

  1192         Boolean count = null;

  1193         boolean array = false;

  1194         sig.append("__");

  1195         int firstPos = sig.length();

  1196         while (i < descriptor.length()) {

  1197             char ch = descriptor.charAt(i++);

  1198             switch (ch) {

  1199                 case '(':

  1200                     count = true;

  1201                     continue;

  1202                 case ')':

  1203                     count = false;

  1204                     continue;

  1205                 case 'B': 

  1206                 case 'C': 

  1207                 case 'D': 

  1208                 case 'F': 

  1209                 case 'I': 

  1210                 case 'J': 

  1211                 case 'S': 

  1212                 case 'Z': 

  1213                     if (count) {

  1214                         if (array) {

  1215                             sig.append("_3");

  1216                         }

  1217                         sig.append(ch);

  1218                         if (ch == 'J' || ch == 'D') {

  1219                             cnt.append('1');

  1220                         } else {

  1221                             cnt.append('0');

  1222                         }

  1223                     } else {

  1224                         sig.insert(firstPos, ch);

  1225                         if (array) {

  1226                             returnType[0] = '[';

  1227                             sig.insert(firstPos, "_3");

  1228                         } else {

  1229                             returnType[0] = ch;

  1230                         }

  1231                     }

  1232                     array = false;

  1233                     continue;

  1234                 case 'V': 

  1235                     assert !count;

  1236                     returnType[0] = 'V';

  1237                     sig.insert(firstPos, 'V');

  1238                     continue;

  1239                 case 'L':

  1240                     int next = descriptor.indexOf(';', i);

  1241                     String realSig = mangleSig(descriptor, i - 1, next + 1);

  1242                     if (count) {

  1243                         if (array) {

  1244                             sig.append("_3");

  1245                         }

  1246                         sig.append(realSig);

  1247                         cnt.append('0');

  1248                     } else {

  1249                         sig.insert(firstPos, realSig);

  1250                         if (array) {

  1251                             sig.insert(firstPos, "_3");

  1252                         }

  1253                         returnType[0] = 'L';

  1254                     }

  1255                     i = next + 1;

  1256                     array = false;

  1257                     continue;

  1258                 case '[':

  1259                     array = true;

  1260                     continue;

  1261                 default:

  1262                     throw new IllegalStateException("Invalid char: " + ch);

  1263             }

  1264         }

  1265     }

  1266     

  1267     private static String mangleSig(String txt, int first, int last) {

  1268         StringBuilder sb = new StringBuilder();

  1269         for (int i = first; i < last; i++) {

  1270             final char ch = txt.charAt(i);

  1271             switch (ch) {

  1272                 case '/': sb.append('_'); break;

  1273                 case '_': sb.append("_1"); break;

  1274                 case ';': sb.append("_2"); break;

  1275                 case '[': sb.append("_3"); break;

  1276                 default: sb.append(ch); break;

  1277             }

  1278         }

  1279         return sb.toString();

  1280     }

  1281 

  1282     private static String findMethodName(MethodData m, StringBuilder cnt) {

  1283         StringBuilder name = new StringBuilder();

  1284         if ("<init>".equals(m.getName())) { // NOI18N

  1285             name.append("cons"); // NOI18N

  1286         } else if ("<clinit>".equals(m.getName())) { // NOI18N

  1287             name.append("class"); // NOI18N

  1288         } else {

  1289             name.append(m.getName());

  1290         } 

  1291         

  1292         countArgs(m.getInternalSig(), new char[1], name, cnt);

  1293         return name.toString();

  1294     }

  1295 

  1296     static String findMethodName(String[] mi, StringBuilder cnt, char[] returnType) {

  1297         StringBuilder name = new StringBuilder();

  1298         String descr = mi[2];//mi.getDescriptor();

  1299         String nm= mi[1];

  1300         if ("<init>".equals(nm)) { // NOI18N

  1301             name.append("cons"); // NOI18N

  1302         } else {

  1303             name.append(nm);

  1304         }

  1305         countArgs(descr, returnType, name, cnt);

  1306         return name.toString();

  1307     }

  1308 

  1309     private int invokeStaticMethod(byte[] byteCodes, int i, final StackMapper mapper, boolean isStatic)

  1310     throws IOException {

  1311         int methodIndex = readIntArg(byteCodes, i);

  1312         String[] mi = jc.getFieldInfoName(methodIndex);

  1313         char[] returnType = { 'V' };

  1314         StringBuilder cnt = new StringBuilder();

  1315         String mn = findMethodName(mi, cnt, returnType);

  1316 

  1317         final int numArguments = isStatic ? cnt.length() : cnt.length() + 1;

  1318         final Variable[] vars = new Variable[numArguments];

  1319 

  1320         for (int j = numArguments - 1; j >= 0; --j) {

  1321             vars[j] = mapper.pop();

  1322         }

  1323 

  1324         if (returnType[0] != 'V') {

  1325             out.append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1326                .append(" = ");

  1327         }

  1328 

  1329         final String in = mi[0];

  1330         out.append(accessClass(in.replace('/', '_')));

  1331         out.append("(false).");

  1332         if (mn.startsWith("cons_")) {

  1333             out.append("constructor.");

  1334         }

  1335         out.append(mn);

  1336         if (isStatic) {

  1337             out.append('(');

  1338         } else {

  1339             out.append(".call(");

  1340         }

  1341         if (numArguments > 0) {

  1342             out.append(vars[0]);

  1343             for (int j = 1; j < numArguments; ++j) {

  1344                 out.append(", ");

  1345                 out.append(vars[j]);

  1346             }

  1347         }

  1348         out.append(");");

  1349         i += 2;

  1350         addReference(in);

  1351         return i;

  1352     }

  1353     private int invokeVirtualMethod(byte[] byteCodes, int i, final StackMapper mapper)

  1354     throws IOException {

  1355         int methodIndex = readIntArg(byteCodes, i);

  1356         String[] mi = jc.getFieldInfoName(methodIndex);

  1357         char[] returnType = { 'V' };

  1358         StringBuilder cnt = new StringBuilder();

  1359         String mn = findMethodName(mi, cnt, returnType);

  1360 

  1361         final int numArguments = cnt.length() + 1;

  1362         final Variable[] vars = new Variable[numArguments];

  1363 

  1364         for (int j = numArguments - 1; j >= 0; --j) {

  1365             vars[j] = mapper.pop();

  1366         }

  1367 

  1368         if (returnType[0] != 'V') {

  1369             out.append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1370                .append(" = ");

  1371         }

  1372 

  1373         out.append(vars[0]).append('.');

  1374         out.append(mn);

  1375         out.append('(');

  1376         String sep = "";

  1377         for (int j = 1; j < numArguments; ++j) {

  1378             out.append(sep);

  1379             out.append(vars[j]);

  1380             sep = ", ";

  1381         }

  1382         out.append(");");

  1383         i += 2;

  1384         return i;

  1385     }

  1386 

  1387     private void addReference(String cn) throws IOException {

  1388         if (requireReference(cn)) {

  1389             debug(" /* needs " + cn + " */");

  1390         }

  1391     }

  1392 

  1393     private void outType(String d, StringBuilder out) {

  1394         int arr = 0;

  1395         while (d.charAt(0) == '[') {

  1396             out.append('A');

  1397             d = d.substring(1);

  1398         }

  1399         if (d.charAt(0) == 'L') {

  1400             assert d.charAt(d.length() - 1) == ';';

  1401             out.append(d.replace('/', '_').substring(0, d.length() - 1));

  1402         } else {

  1403             out.append(d);

  1404         }

  1405     }

  1406 

  1407     private String encodeConstant(int entryIndex) throws IOException {

  1408         String[] classRef = { null };

  1409         String s = jc.stringValue(entryIndex, classRef);

  1410         if (classRef[0] != null) {

  1411             addReference(classRef[0]);

  1412             s = accessClass(s.replace('/', '_')) + "(false).constructor.$class";

  1413         }

  1414         return s;

  1415     }

  1416 

  1417     private String javaScriptBody(String prefix, MethodData m, boolean isStatic) throws IOException {

  1418         byte[] arr = m.findAnnotationData(true);

  1419         if (arr == null) {

  1420             return null;

  1421         }

  1422         final String jvmType = "Lorg/apidesign/bck2brwsr/core/JavaScriptBody;";

  1423         class P extends AnnotationParser {

  1424             public P() {

  1425                 super(false);

  1426             }

  1427             

  1428             int cnt;

  1429             String[] args = new String[30];

  1430             String body;

  1431             

  1432             @Override

  1433             protected void visitAttr(String type, String attr, String at, String value) {

  1434                 if (type.equals(jvmType)) {

  1435                     if ("body".equals(attr)) {

  1436                         body = value;

  1437                     } else if ("args".equals(attr)) {

  1438                         args[cnt++] = value;

  1439                     } else {

  1440                         throw new IllegalArgumentException(attr);

  1441                     }

  1442                 }

  1443             }

  1444         }

  1445         P p = new P();

  1446         p.parse(arr, jc);

  1447         if (p.body == null) {

  1448             return null;

  1449         }

  1450         StringBuilder cnt = new StringBuilder();

  1451         final String mn = findMethodName(m, cnt);

  1452         out.append(prefix).append(mn);

  1453         out.append(" = function(");

  1454         String space = "";

  1455         int index = 0;

  1456         for (int i = 0; i < cnt.length(); i++) {

  1457             out.append(space);

  1458             space = outputArg(out, p.args, index);

  1459             index++;

  1460         }

  1461         out.append(") {").append("\n");

  1462         out.append(p.body);

  1463         out.append("\n}\n");

  1464         return mn;

  1465     }

  1466     private static String className(ClassData jc) {

  1467         //return jc.getName().getInternalName().replace('/', '_');

  1468         return jc.getClassName().replace('/', '_');

  1469     }

  1470     

  1471     private static String[] findAnnotation(

  1472         byte[] arr, ClassData cd, final String className, 

  1473         final String... attrNames

  1474     ) throws IOException {

  1475         if (arr == null) {

  1476             return null;

  1477         }

  1478         final String[] values = new String[attrNames.length];

  1479         final boolean[] found = { false };

  1480         final String jvmType = "L" + className.replace('.', '/') + ";";

  1481         AnnotationParser ap = new AnnotationParser(false) {

  1482             @Override

  1483             protected void visitAttr(String type, String attr, String at, String value) {

  1484                 if (type.equals(jvmType)) {

  1485                     found[0] = true;

  1486                     for (int i = 0; i < attrNames.length; i++) {

  1487                         if (attrNames[i].equals(attr)) {

  1488                             values[i] = value;

  1489                         }

  1490                     }

  1491                 }

  1492             }

  1493             

  1494         };

  1495         ap.parse(arr, cd);

  1496         return found[0] ? values : null;

  1497     }

  1498 

  1499     private CharSequence initField(FieldData v) {

  1500         final String is = v.getInternalSig();

  1501         if (is.length() == 1) {

  1502             switch (is.charAt(0)) {

  1503                 case 'S':

  1504                 case 'J':

  1505                 case 'B':

  1506                 case 'Z':

  1507                 case 'C':

  1508                 case 'I': return " = 0;";

  1509                 case 'F': 

  1510                 case 'D': return " = 0.0;";

  1511                 default:

  1512                     throw new IllegalStateException(is);

  1513             }

  1514         }

  1515         return " = null;";

  1516     }

  1517 

  1518     private static void generateAnno(ClassData cd, final Appendable out, byte[] data) throws IOException {

  1519         AnnotationParser ap = new AnnotationParser(true) {

  1520             int anno;

  1521             int cnt;

  1522             

  1523             @Override

  1524             protected void visitAnnotationStart(String type) throws IOException {

  1525                 if (anno++ > 0) {

  1526                     out.append(",");

  1527                 }

  1528                 out.append('"').append(type).append("\" : {\n");

  1529                 cnt = 0;

  1530             }

  1531 

  1532             @Override

  1533             protected void visitAnnotationEnd(String type) throws IOException {

  1534                 out.append("\n}\n");

  1535             }

  1536             

  1537             @Override

  1538             protected void visitAttr(String type, String attr, String attrType, String value) 

  1539             throws IOException {

  1540                 if (attr == null) {

  1541                     return;

  1542                 }

  1543                 if (cnt++ > 0) {

  1544                     out.append(",\n");

  1545                 }

  1546                 out.append(attr).append("__").append(attrType).append(" : ").append(value);

  1547             }

  1548         };

  1549         ap.parse(data, cd);

  1550     }

  1551 

  1552     private static String outputArg(Appendable out, String[] args, int indx) throws IOException {

  1553         final String name = args[indx];

  1554         if (name == null) {

  1555             return "";

  1556         }

  1557         if (name.contains(",")) {

  1558             throw new IOException("Wrong parameter with ',': " + name);

  1559         }

  1560         out.append(name);

  1561         return ",";

  1562     }

  1563 

  1564     private static void emit(final Appendable out,

  1565                              final String format,

  1566                              final CharSequence... params) throws IOException {

  1567         final int length = format.length();

  1568 

  1569         int processed = 0;

  1570         int paramOffset = format.indexOf('@');

  1571         while ((paramOffset != -1) && (paramOffset < (length - 1))) {

  1572             final char paramChar = format.charAt(paramOffset + 1);

  1573             if ((paramChar >= '1') && (paramChar <= '9')) {

  1574                 final int paramIndex = paramChar - '0' - 1;

  1575 

  1576                 out.append(format, processed, paramOffset);

  1577                 out.append(params[paramIndex]);

  1578 

  1579                 ++paramOffset;

  1580                 processed = paramOffset + 1;

  1581             }

  1582 

  1583             paramOffset = format.indexOf('@', paramOffset + 1);

  1584         }

  1585 

  1586         out.append(format, processed, length);

  1587     }

  1588 

  1589     private void generateCatch(TrapData[] traps) throws IOException {

  1590         out.append("} catch (e) {\n");

  1591         int finallyPC = -1;

  1592         for (TrapData e : traps) {

  1593             if (e == null) {

  1594                 break;

  1595             }

  1596             if (e.catch_cpx != 0) { //not finally

  1597                 final String classInternalName = jc.getClassName(e.catch_cpx);

  1598                 addReference(classInternalName);

  1599                 if ("java/lang/Throwable".equals(classInternalName)) {

  1600                     out.append("if (e.$instOf_java_lang_Throwable) {");

  1601                     out.append("  stA0 = e;");

  1602                     out.append("} else {");

  1603                     out.append("  stA0 = vm.java_lang_Throwable(true);");

  1604                     out.append("  vm.java_lang_Throwable.cons__VLjava_lang_String_2.call(stA0, e.toString());");

  1605                     out.append("}");

  1606                     out.append("gt=" + e.handler_pc + "; continue;");

  1607                 } else {

  1608                     out.append("if (e.$instOf_" + classInternalName.replace('/', '_') + ") {");

  1609                     out.append("gt=" + e.handler_pc + "; stA0 = e; continue;");

  1610                     out.append("}\n");

  1611                 }

  1612             } else {

  1613                 finallyPC = e.handler_pc;

  1614             }

  1615         }

  1616         if (finallyPC == -1) {

  1617             out.append("throw e;");

  1618         } else {

  1619             out.append("gt=" + finallyPC + "; stA0 = e; continue;");

  1620         }

  1621         out.append("\n}");

  1622     }

  1623 }
hg/bck2brwsr