hg/bck2brwsr: vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java@44a5802816be

     1 /**

     2  * Back 2 Browser Bytecode Translator

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

     4  *

     5  * This program is free software: you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation, version 2 of the License.

     8  *

     9  * This program is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    12  * GNU General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU General Public License

    15  * along with this program. Look for COPYING file in the top folder.

    16  * If not, see http://opensource.org/licenses/GPL-2.0.

    17  */

    18 package org.apidesign.vm4brwsr;

    20 import java.io.IOException;

    21 import java.io.InputStream;

    22 import org.apidesign.javap.AnnotationParser;

    23 import org.apidesign.javap.ClassData;

    24 import org.apidesign.javap.FieldData;

    25 import org.apidesign.javap.MethodData;

    26 import org.apidesign.javap.StackMapIterator;

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

    28 import org.apidesign.javap.TrapData;

    29 import org.apidesign.javap.TrapDataIterator;

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

    32  *

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

    34  */

    35 abstract class ByteCodeToJavaScript {

    36     private ClassData jc;

    37     final Appendable out;

    39     protected ByteCodeToJavaScript(Appendable out) {

    40         this.out = out;

    41     }

    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);

    51     /*

    52      * @param resourcePath name of resources to read

    53      */

    54     protected abstract void requireScript(String resourcePath);

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

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

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

    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     }

    69     /**

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

    71      *

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

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

    74      *

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

    76      */

    78     public String compile(InputStream classFile) throws IOException {

    79         this.jc = new ClassData(classFile);

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

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

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

    83             );

    84         }

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

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

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

    88             "resource", "processByteCode"

    89         );

    90         if (arr != null) {

    91             requireScript(arr[0]);

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

    93                 return null;

    94             }

    95         }

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

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

    98             "container", "prototype"

    99         );

   100         StringArray toInitilize = new StringArray();

   101         final String className = className(jc);

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

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

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

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

   106             if (v.isStatic()) {

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

   108             }

   109         }

   110         if (proto == null) {

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

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

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

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

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

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

   117         } else {

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

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

   120                 proto[0] = "p";

   121             }

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

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

   124         }

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

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

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

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

   129                 "name", "value"

   130             );

   131             if (only != null) {

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

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

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

   135                 }

   136                 continue;

   137             }

   138             String mn;

   139             if (m.isStatic()) {

   140                 mn = generateStaticMethod("\n    c.", m, toInitilize);

   141             } else {

   142                 mn = generateInstanceMethod("\n    c.", m);

   143             }

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

   145             if (runAnno != null) {

   146                 out.append("\n    c.").append(mn).append(".anno = {");

   147                 generateAnno(jc, out, runAnno);

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

   149             }

   150             out.append("\n    c.").append(mn).append(".access = " + m.getAccess()).append(";");

   151         }

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

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

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

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

   156         }

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

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

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

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

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

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

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

   164         if (classAnno != null) {

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

   166             generateAnno(jc, out, classAnno);

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

   168         }

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

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

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

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

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

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

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

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

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

   178                 "name", "value"

   179             );

   180             if (only != null) {

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

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

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

   184                 }

   185                 continue;

   186             }

   187             if (!v.isStatic()) {

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

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

   190             }

   191         }

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

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

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

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

   196         StringBuilder sb = new StringBuilder();

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

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

   199         }

   200         return sb.toString();

   201     }

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

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

   204         if (jsb != null) {

   205             return jsb;

   206         }

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

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

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

   210         }

   211         generateMethod(prefix, mn, m);

   212         return mn;

   213     }

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

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

   217         if (jsb != null) {

   218             return jsb;

   219         }

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

   221         generateMethod(prefix, mn, m);

   222         return mn;

   223     }

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

   226             throws IOException {

   227         final StackMapIterator stackMapIterator = m.createStackMapIterator();

   228         TrapDataIterator trap = m.getTrapDataIterator();

   229         final LocalsMapper lmapper =

   230                 new LocalsMapper(stackMapIterator.getArguments());

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

   233         lmapper.outputArguments(out);

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

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

   237         if (byteCodes == null) {

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

   239                .append(m.getInternalSig()).append("';\n");

   240             out.append("};");

   241             return;

   242         }

   244         final StackMapper smapper = new StackMapper();

   246         final int maxLocals = m.getMaxLocals();

   247         if (maxLocals > 0) {

   248             // TODO: generate only used local variables

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

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

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

   252                     out.append(", ");

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

   254                 }

   255                 out.append(';');

   256             }

   257         }

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

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

   261         final int maxStack = m.getMaxStack();

   262         if (maxStack > 0) {

   263             // TODO: generate only used stack variables

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

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

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

   267                     out.append(", ");

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

   269                 }

   270                 out.append(';');

   271             }

   272         }

   274         int lastStackFrame = -1;

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

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

   278             int prev = i;

   279             stackMapIterator.advanceTo(i);

   280             trap.advanceTo(i);

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

   282                 lastStackFrame = stackMapIterator.getFrameIndex();

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

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

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

   286             } else {

   287                 out.append("    /* " + i).append(" */ ");

   288             }

   289             if (trap.useTry()) {

   290                 out.append("try {");

   291             }

   292             final int c = readByte(byteCodes, i);

   293             switch (c) {

   294                 case opc_aload_0:

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

   296                     break;

   297                 case opc_iload_0:

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

   299                     break;

   300                 case opc_lload_0:

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

   302                     break;

   303                 case opc_fload_0:

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

   305                     break;

   306                 case opc_dload_0:

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

   308                     break;

   309                 case opc_aload_1:

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

   311                     break;

   312                 case opc_iload_1:

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

   314                     break;

   315                 case opc_lload_1:

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

   317                     break;

   318                 case opc_fload_1:

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

   320                     break;

   321                 case opc_dload_1:

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

   323                     break;

   324                 case opc_aload_2:

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

   326                     break;

   327                 case opc_iload_2:

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

   329                     break;

   330                 case opc_lload_2:

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

   332                     break;

   333                 case opc_fload_2:

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

   335                     break;

   336                 case opc_dload_2:

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

   338                     break;

   339                 case opc_aload_3:

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

   341                     break;

   342                 case opc_iload_3:

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

   344                     break;

   345                 case opc_lload_3:

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

   347                     break;

   348                 case opc_fload_3:

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

   350                     break;

   351                 case opc_dload_3:

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

   353                     break;

   354                 case opc_iload: {

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

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

   357                     break;

   358                 }

   359                 case opc_lload: {

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

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

   362                     break;

   363                 }

   364                 case opc_fload: {

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

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

   367                     break;

   368                 }

   369                 case opc_dload: {

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

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

   372                     break;

   373                 }

   374                 case opc_aload: {

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

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

   377                     break;

   378                 }

   379                 case opc_istore: {

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

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

   382                     break;

   383                 }

   384                 case opc_lstore: {

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

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

   387                     break;

   388                 }

   389                 case opc_fstore: {

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

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

   392                     break;

   393                 }

   394                 case opc_dstore: {

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

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

   397                     break;

   398                 }

   399                 case opc_astore: {

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

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

   402                     break;

   403                 }

   404                 case opc_astore_0:

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

   406                     break;

   407                 case opc_istore_0:

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

   409                     break;

   410                 case opc_lstore_0:

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

   412                     break;

   413                 case opc_fstore_0:

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

   415                     break;

   416                 case opc_dstore_0:

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

   418                     break;

   419                 case opc_astore_1:

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

   421                     break;

   422                 case opc_istore_1:

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

   424                     break;

   425                 case opc_lstore_1:

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

   427                     break;

   428                 case opc_fstore_1:

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

   430                     break;

   431                 case opc_dstore_1:

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

   433                     break;

   434                 case opc_astore_2:

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

   436                     break;

   437                 case opc_istore_2:

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

   439                     break;

   440                 case opc_lstore_2:

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

   442                     break;

   443                 case opc_fstore_2:

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

   445                     break;

   446                 case opc_dstore_2:

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

   448                     break;

   449                 case opc_astore_3:

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

   451                     break;

   452                 case opc_istore_3:

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

   454                     break;

   455                 case opc_lstore_3:

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

   457                     break;

   458                 case opc_fstore_3:

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

   460                     break;

   461                 case opc_dstore_3:

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

   463                     break;

   464                 case opc_iadd:

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

   466                     break;

   467                 case opc_ladd:

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

   469                     break;

   470                 case opc_fadd:

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

   472                     break;

   473                 case opc_dadd:

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

   475                     break;

   476                 case opc_isub:

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

   478                     break;

   479                 case opc_lsub:

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

   481                     break;

   482                 case opc_fsub:

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

   484                     break;

   485                 case opc_dsub:

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

   487                     break;

   488                 case opc_imul:

   489                     emit(out, "@1 *= @2;", smapper.getI(1), smapper.popI());

   490                     break;

   491                 case opc_lmul:

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

   493                     break;

   494                 case opc_fmul:

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

   496                     break;

   497                 case opc_dmul:

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

   499                     break;

   500                 case opc_idiv:

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

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

   503                     break;

   504                 case opc_ldiv:

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

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

   507                     break;

   508                 case opc_fdiv:

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

   510                     break;

   511                 case opc_ddiv:

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

   513                     break;

   514                 case opc_irem:

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

   516                     break;

   517                 case opc_lrem:

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

   519                     break;

   520                 case opc_frem:

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

   522                     break;

   523                 case opc_drem:

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

   525                     break;

   526                 case opc_iand:

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

   528                     break;

   529                 case opc_land:

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

   531                     break;

   532                 case opc_ior:

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

   534                     break;

   535                 case opc_lor:

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

   537                     break;

   538                 case opc_ixor:

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

   540                     break;

   541                 case opc_lxor:

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

   543                     break;

   544                 case opc_ineg:

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

   546                     break;

   547                 case opc_lneg:

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

   549                     break;

   550                 case opc_fneg:

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

   552                     break;

   553                 case opc_dneg:

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

   555                     break;

   556                 case opc_ishl:

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

   558                     break;

   559                 case opc_lshl:

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

   561                     break;

   562                 case opc_ishr:

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

   564                     break;

   565                 case opc_lshr:

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

   567                     break;

   568                 case opc_iushr:

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

   570                     break;

   571                 case opc_lushr:

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

   573                     break;

   574                 case opc_iinc: {

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

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

   577                     if (incrBy == 1) {

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

   579                     } else {

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

   581                              lmapper.getI(varIndx),

   582                              Integer.toString(incrBy));

   583                     }

   584                     break;

   585                 }

   586                 case opc_return:

   587                     emit(out, "return;");

   588                     break;

   589                 case opc_ireturn:

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

   591                     break;

   592                 case opc_lreturn:

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

   594                     break;

   595                 case opc_freturn:

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

   597                     break;

   598                 case opc_dreturn:

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

   600                     break;

   601                 case opc_areturn:

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

   603                     break;

   604                 case opc_i2l:

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

   606                     break;

   607                 case opc_i2f:

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

   609                     break;

   610                 case opc_i2d:

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

   612                     break;

   613                 case opc_l2i:

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

   615                     break;

   616                     // max int check?

   617                 case opc_l2f:

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

   619                     break;

   620                 case opc_l2d:

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

   622                     break;

   623                 case opc_f2d:

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

   625                     break;

   626                 case opc_d2f:

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

   628                     break;

   629                 case opc_f2i:

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

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

   632                     break;

   633                 case opc_f2l:

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

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

   636                     break;

   637                 case opc_d2i:

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

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

   640                     break;

   641                 case opc_d2l:

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

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

   644                     break;

   645                 case opc_i2b:

   646                 case opc_i2c:

   647                 case opc_i2s:

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

   649                     break;

   650                 case opc_aconst_null:

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

   652                     break;

   653                 case opc_iconst_m1:

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

   655                     break;

   656                 case opc_iconst_0:

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

   658                     break;

   659                 case opc_dconst_0:

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

   661                     break;

   662                 case opc_lconst_0:

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

   664                     break;

   665                 case opc_fconst_0:

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

   667                     break;

   668                 case opc_iconst_1:

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

   670                     break;

   671                 case opc_lconst_1:

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

   673                     break;

   674                 case opc_fconst_1:

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

   676                     break;

   677                 case opc_dconst_1:

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

   679                     break;

   680                 case opc_iconst_2:

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

   682                     break;

   683                 case opc_fconst_2:

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

   685                     break;

   686                 case opc_iconst_3:

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

   688                     break;

   689                 case opc_iconst_4:

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

   691                     break;

   692                 case opc_iconst_5:

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

   694                     break;

   695                 case opc_ldc: {

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

   697                     String v = encodeConstant(indx);

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

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

   700                     break;

   701                 }

   702                 case opc_ldc_w:

   703                 case opc_ldc2_w: {

   704                     int indx = readIntArg(byteCodes, i);

   705                     i += 2;

   706                     String v = encodeConstant(indx);

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

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

   709                     break;

   710                 }

   711                 case opc_lcmp:

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

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

   714                     break;

   715                 case opc_fcmpl:

   716                 case opc_fcmpg:

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

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

   719                     break;

   720                 case opc_dcmpl:

   721                 case opc_dcmpg:

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

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

   724                     break;

   725                 case opc_if_acmpeq:

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

   727                                    "===");

   728                     break;

   729                 case opc_if_acmpne:

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

   731                                    "!=");

   732                     break;

   733                 case opc_if_icmpeq:

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

   735                                    "==");

   736                     break;

   737                 case opc_ifeq: {

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

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

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

   741                     i += 2;

   742                     break;

   743                 }

   744                 case opc_ifne: {

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

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

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

   748                     i += 2;

   749                     break;

   750                 }

   751                 case opc_iflt: {

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

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

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

   755                     i += 2;

   756                     break;

   757                 }

   758                 case opc_ifle: {

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

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

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

   762                     i += 2;

   763                     break;

   764                 }

   765                 case opc_ifgt: {

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

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

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

   769                     i += 2;

   770                     break;

   771                 }

   772                 case opc_ifge: {

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

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

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

   776                     i += 2;

   777                     break;

   778                 }

   779                 case opc_ifnonnull: {

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

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

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

   783                     i += 2;

   784                     break;

   785                 }

   786                 case opc_ifnull: {

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

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

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

   790                     i += 2;

   791                     break;

   792                 }

   793                 case opc_if_icmpne:

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

   795                                    "!=");

   796                     break;

   797                 case opc_if_icmplt:

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

   799                                    "<");

   800                     break;

   801                 case opc_if_icmple:

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

   803                                    "<=");

   804                     break;

   805                 case opc_if_icmpgt:

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

   807                                    ">");

   808                     break;

   809                 case opc_if_icmpge:

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

   811                                    ">=");

   812                     break;

   813                 case opc_goto: {

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

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

   816                     i += 2;

   817                     break;

   818                 }

   819                 case opc_lookupswitch: {

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

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

   822                     table += 4;

   823                     int n = readInt4(byteCodes, table);

   824                     table += 4;

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

   826                     while (n-- > 0) {

   827                         int cnstnt = readInt4(byteCodes, table);

   828                         table += 4;

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

   830                         table += 4;

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

   832                     }

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

   834                     i = table - 1;

   835                     break;

   836                 }

   837                 case opc_tableswitch: {

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

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

   840                     table += 4;

   841                     int low = readInt4(byteCodes, table);

   842                     table += 4;

   843                     int high = readInt4(byteCodes, table);

   844                     table += 4;

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

   846                     while (low <= high) {

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

   848                         table += 4;

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

   850                         low++;

   851                     }

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

   853                     i = table - 1;

   854                     break;

   855                 }

   856                 case opc_invokeinterface: {

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

   858                     break;

   859                 }

   860                 case opc_invokevirtual:

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

   862                     break;

   863                 case opc_invokespecial:

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

   865                     break;

   866                 case opc_invokestatic:

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

   868                     break;

   869                 case opc_new: {

   870                     int indx = readIntArg(byteCodes, i);

   871                     String ci = jc.getClassName(indx);

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

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

   874                     addReference(ci);

   875                     i += 2;

   876                     break;

   877                 }

   878                 case opc_newarray:

   879                     ++i; // skip type of array

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

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

   882                     break;

   883                 case opc_anewarray:

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

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

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

   887                     break;

   888                 case opc_multianewarray: {

   889                     i += 2;

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

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

   892                        .append(").fillNulls();");

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

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

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

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

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

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

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

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

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

   902                             append(";");

   903                     }

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

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

   906                     }

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

   908                     break;

   909                 }

   910                 case opc_arraylength:

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

   912                     break;

   913                 case opc_lastore:

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

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

   916                     break;

   917                 case opc_fastore:

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

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

   920                     break;

   921                 case opc_dastore:

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

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

   924                     break;

   925                 case opc_aastore:

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

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

   928                     break;

   929                 case opc_iastore:

   930                 case opc_bastore:

   931                 case opc_castore:

   932                 case opc_sastore:

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

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

   935                     break;

   936                 case opc_laload:

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

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

   939                     break;

   940                 case opc_faload:

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

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

   943                     break;

   944                 case opc_daload:

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

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

   947                     break;

   948                 case opc_aaload:

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

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

   951                     break;

   952                 case opc_iaload:

   953                 case opc_baload:

   954                 case opc_caload:

   955                 case opc_saload:

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

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

   958                     break;

   959                 case opc_pop:

   960                 case opc_pop2:

   961                     smapper.pop(1);

   962                     out.append("/* pop */");

   963                     break;

   964                 case opc_dup: {

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

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

   967                     break;

   968                 }

   969                 case opc_dup2: {

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

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

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

   973                     } else {

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

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

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

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

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

   979                     }

   980                     break;

   981                 }

   982                 case opc_dup_x1: {

   983                     final Variable vi1 = smapper.pop();

   984                     final Variable vi2 = smapper.pop();

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

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

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

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

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

   991                     break;

   992                 }

   993                 case opc_dup_x2: {

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

   995                         final Variable vi1 = smapper.pop();

   996                         final Variable vi2 = smapper.pop();

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

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

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

  1001                         emit(out, "{ @1 = @2; @3 = @4; @5 = @6; }",

  1002                              vo1, vi1, vo2, vi2, vo3, vo1);

  1003                     } else {

  1004                         final Variable vi1 = smapper.pop();

  1005                         final Variable vi2 = smapper.pop();

  1006                         final Variable vi3 = smapper.pop();

  1007                         final Variable vo4 = smapper.pushT(vi1.getType());

  1008                         final Variable vo3 = smapper.pushT(vi3.getType());

  1009                         final Variable vo2 = smapper.pushT(vi2.getType());

  1010                         final Variable vo1 = smapper.pushT(vi1.getType());

  1012                         emit(out, "{ @1 = @2; @3 = @4; @5 = @6; @7 = @8; }",

  1013                              vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);

  1014                     }

  1015                     break;

  1016                 }

  1017                 case opc_bipush:

  1018                     emit(out, "@1 = @2;",

  1019                          smapper.pushI(), Integer.toString(byteCodes[++i]));

  1020                     break;

  1021                 case opc_sipush:

  1022                     emit(out, "@1 = @2;",

  1023                          smapper.pushI(),

  1024                          Integer.toString(readIntArg(byteCodes, i)));

  1025                     i += 2;

  1026                     break;

  1027                 case opc_getfield: {

  1028                     int indx = readIntArg(byteCodes, i);

  1029                     String[] fi = jc.getFieldInfoName(indx);

  1030                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1031                     emit(out, "@2 = @1.fld_@3;",

  1032                          smapper.popA(), smapper.pushT(type), fi[1]);

  1033                     i += 2;

  1034                     break;

  1035                 }

  1036                 case opc_getstatic: {

  1037                     int indx = readIntArg(byteCodes, i);

  1038                     String[] fi = jc.getFieldInfoName(indx);

  1039                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1040                     emit(out, "@1 = @2(false).constructor.@3;",

  1041                          smapper.pushT(type),

  1042                          accessClass(fi[0].replace('/', '_')), fi[1]);

  1043                     i += 2;

  1044                     addReference(fi[0]);

  1045                     break;

  1046                 }

  1047                 case opc_putfield: {

  1048                     int indx = readIntArg(byteCodes, i);

  1049                     String[] fi = jc.getFieldInfoName(indx);

  1050                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1051                     emit(out, "@2.fld_@3 = @1;",

  1052                          smapper.popT(type), smapper.popA(), fi[1]);

  1053                     i += 2;

  1054                     break;

  1055                 }

  1056                 case opc_putstatic: {

  1057                     int indx = readIntArg(byteCodes, i);

  1058                     String[] fi = jc.getFieldInfoName(indx);

  1059                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1060                     emit(out, "@1(false).constructor.@2 = @3;",

  1061                          accessClass(fi[0].replace('/', '_')), fi[1],

  1062                          smapper.popT(type));

  1063                     i += 2;

  1064                     addReference(fi[0]);

  1065                     break;

  1066                 }

  1067                 case opc_checkcast: {

  1068                     int indx = readIntArg(byteCodes, i);

  1069                     final String type = jc.getClassName(indx);

  1070                     if (!type.startsWith("[")) {

  1071                         // no way to check arrays right now

  1072                         // XXX proper exception

  1073                         emit(out,

  1074                              "if (@1 !== null && !@1.$instOf_@2) throw {};",

  1075                              smapper.getA(0), type.replace('/', '_'));

  1076                     }

  1077                     i += 2;

  1078                     break;

  1079                 }

  1080                 case opc_instanceof: {

  1081                     int indx = readIntArg(byteCodes, i);

  1082                     final String type = jc.getClassName(indx);

  1083                     emit(out, "@2 = @1.$instOf_@3 ? 1 : 0;",

  1084                          smapper.popA(), smapper.pushI(),

  1085                          type.replace('/', '_'));

  1086                     i += 2;

  1087                     break;

  1088                 }

  1089                 case opc_athrow: {

  1090                     final Variable v = smapper.popA();

  1091                     smapper.clear();

  1093                     emit(out, "{ @1 = @2; throw @2; }",

  1094                          smapper.pushA(), v);

  1095                     break;

  1096                 }

  1098                 case opc_monitorenter: {

  1099                     out.append("/* monitor enter */");

  1100                     smapper.popA();

  1101                     break;

  1102                 }

  1104                 case opc_monitorexit: {

  1105                     out.append("/* monitor exit */");

  1106                     smapper.popA();

  1107                     break;

  1108                 }

  1110                 default: {

  1111                     emit(out, "throw 'unknown bytecode @1';",

  1112                          Integer.toString(c));

  1113                 }

  1114             }

  1115             if (trap.useTry()) {

  1116                 out.append("} catch (e) {");

  1117                 for (TrapData e : trap.current()) {

  1118                     if (e == null) {

  1119                         break;

  1120                     }

  1121                     if (e.catch_cpx != 0) { //not finally

  1122                         final String classInternalName = jc.getClassName(e.catch_cpx);

  1123                         addReference(classInternalName);

  1124                         out.append("if (e.$instOf_"+classInternalName.replace('/', '_')+") {");

  1125                         out.append("gt="+e.handler_pc+"; continue;");

  1126                         out.append("} ");

  1127                     } else {

  1128                         //finally - todo

  1129                     }

  1130                 }

  1131                 out.append("throw e;");

  1132                 out.append("}");

  1133             }

  1134             out.append(" //");

  1135             for (int j = prev; j <= i; j++) {

  1136                 out.append(" ");

  1137                 final int cc = readByte(byteCodes, j);

  1138                 out.append(Integer.toString(cc));

  1139             }

  1140             out.append("\n");

  1141         }

  1142         out.append("  }\n");

  1143         out.append("};");

  1144     }

  1146     private int generateIf(byte[] byteCodes, int i,

  1147                            final Variable v2, final Variable v1,

  1148                            final String test) throws IOException {

  1149         int indx = i + readIntArg(byteCodes, i);

  1150         out.append("if (").append(v1)

  1151            .append(' ').append(test).append(' ')

  1152            .append(v2).append(") { gt = " + indx)

  1153            .append("; continue; }");

  1154         return i + 2;

  1155     }

  1157     private int readIntArg(byte[] byteCodes, int offsetInstruction) {

  1158         final int indxHi = byteCodes[offsetInstruction + 1] << 8;

  1159         final int indxLo = byteCodes[offsetInstruction + 2];

  1160         return (indxHi & 0xffffff00) | (indxLo & 0xff);

  1161     }

  1162     private int readInt4(byte[] byteCodes, int offsetInstruction) {

  1163         final int d = byteCodes[offsetInstruction + 0] << 24;

  1164         final int c = byteCodes[offsetInstruction + 1] << 16;

  1165         final int b = byteCodes[offsetInstruction + 2] << 8;

  1166         final int a = byteCodes[offsetInstruction + 3];

  1167         return (d & 0xff000000) | (c & 0xff0000) | (b & 0xff00) | (a & 0xff);

  1168     }

  1169     private int readByte(byte[] byteCodes, int offsetInstruction) {

  1170         return byteCodes[offsetInstruction] & 0xff;

  1171     }

  1173     private static void countArgs(String descriptor, char[] returnType, StringBuilder sig, StringBuilder cnt) {

  1174         int i = 0;

  1175         Boolean count = null;

  1176         boolean array = false;

  1177         sig.append("__");

  1178         int firstPos = sig.length();

  1179         while (i < descriptor.length()) {

  1180             char ch = descriptor.charAt(i++);

  1181             switch (ch) {

  1182                 case '(':

  1183                     count = true;

  1184                     continue;

  1185                 case ')':

  1186                     count = false;

  1187                     continue;

  1188                 case 'B':

  1189                 case 'C':

  1190                 case 'D':

  1191                 case 'F':

  1192                 case 'I':

  1193                 case 'J':

  1194                 case 'S':

  1195                 case 'Z':

  1196                     if (count) {

  1197                         if (array) {

  1198                             sig.append("_3");

  1199                         }

  1200                         sig.append(ch);

  1201                         if (ch == 'J' || ch == 'D') {

  1202                             cnt.append('1');

  1203                         } else {

  1204                             cnt.append('0');

  1205                         }

  1206                     } else {

  1207                         sig.insert(firstPos, ch);

  1208                         if (array) {

  1209                             returnType[0] = '[';

  1210                             sig.insert(firstPos, "_3");

  1211                         } else {

  1212                             returnType[0] = ch;

  1213                         }

  1214                     }

  1215                     array = false;

  1216                     continue;

  1217                 case 'V':

  1218                     assert !count;

  1219                     returnType[0] = 'V';

  1220                     sig.insert(firstPos, 'V');

  1221                     continue;

  1222                 case 'L':

  1223                     int next = descriptor.indexOf(';', i);

  1224                     String realSig = mangleSig(descriptor, i - 1, next + 1);

  1225                     if (count) {

  1226                         if (array) {

  1227                             sig.append("_3");

  1228                         }

  1229                         sig.append(realSig);

  1230                         cnt.append('0');

  1231                     } else {

  1232                         sig.insert(firstPos, realSig);

  1233                         if (array) {

  1234                             sig.insert(firstPos, "_3");

  1235                         }

  1236                         returnType[0] = 'L';

  1237                     }

  1238                     i = next + 1;

  1239                     continue;

  1240                 case '[':

  1241                     array = true;

  1242                     continue;

  1243                 default:

  1244                     throw new IllegalStateException("Invalid char: " + ch);

  1245             }

  1246         }

  1247     }

  1249     private static String mangleSig(String txt, int first, int last) {

  1250         StringBuilder sb = new StringBuilder();

  1251         for (int i = first; i < last; i++) {

  1252             final char ch = txt.charAt(i);

  1253             switch (ch) {

  1254                 case '/': sb.append('_'); break;

  1255                 case '_': sb.append("_1"); break;

  1256                 case ';': sb.append("_2"); break;

  1257                 case '[': sb.append("_3"); break;

  1258                 default: sb.append(ch); break;

  1259             }

  1260         }

  1261         return sb.toString();

  1262     }

  1264     private static String findMethodName(MethodData m, StringBuilder cnt) {

  1265         StringBuilder name = new StringBuilder();

  1266         if ("<init>".equals(m.getName())) { // NOI18N

  1267             name.append("cons"); // NOI18N

  1268         } else if ("<clinit>".equals(m.getName())) { // NOI18N

  1269             name.append("class"); // NOI18N

  1270         } else {

  1271             name.append(m.getName());

  1272         }

  1274         countArgs(m.getInternalSig(), new char[1], name, cnt);

  1275         return name.toString();

  1276     }

  1278     static String findMethodName(String[] mi, StringBuilder cnt, char[] returnType) {

  1279         StringBuilder name = new StringBuilder();

  1280         String descr = mi[2];//mi.getDescriptor();

  1281         String nm= mi[1];

  1282         if ("<init>".equals(nm)) { // NOI18N

  1283             name.append("cons"); // NOI18N

  1284         } else {

  1285             name.append(nm);

  1286         }

  1287         countArgs(descr, returnType, name, cnt);

  1288         return name.toString();

  1289     }

  1291     private int invokeStaticMethod(byte[] byteCodes, int i, final StackMapper mapper, boolean isStatic)

  1292     throws IOException {

  1293         int methodIndex = readIntArg(byteCodes, i);

  1294         String[] mi = jc.getFieldInfoName(methodIndex);

  1295         char[] returnType = { 'V' };

  1296         StringBuilder cnt = new StringBuilder();

  1297         String mn = findMethodName(mi, cnt, returnType);

  1299         final int numArguments = isStatic ? cnt.length() : cnt.length() + 1;

  1300         final Variable[] vars = new Variable[numArguments];

  1302         for (int j = numArguments - 1; j >= 0; --j) {

  1303             vars[j] = mapper.pop();

  1304         }

  1306         if (returnType[0] != 'V') {

  1307             out.append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1308                .append(" = ");

  1309         }

  1311         final String in = mi[0];

  1312         out.append(accessClass(in.replace('/', '_')));

  1313         out.append("(false).");

  1314         out.append(mn);

  1315         out.append('(');

  1316         if (numArguments > 0) {

  1317             out.append(vars[0]);

  1318             for (int j = 1; j < numArguments; ++j) {

  1319                 out.append(", ");

  1320                 out.append(vars[j]);

  1321             }

  1322         }

  1323         out.append(");");

  1324         i += 2;

  1325         addReference(in);

  1326         return i;

  1327     }

  1328     private int invokeVirtualMethod(byte[] byteCodes, int i, final StackMapper mapper)

  1329     throws IOException {

  1330         int methodIndex = readIntArg(byteCodes, i);

  1331         String[] mi = jc.getFieldInfoName(methodIndex);

  1332         char[] returnType = { 'V' };

  1333         StringBuilder cnt = new StringBuilder();

  1334         String mn = findMethodName(mi, cnt, returnType);

  1336         final int numArguments = cnt.length() + 1;

  1337         final Variable[] vars = new Variable[numArguments];

  1339         for (int j = numArguments - 1; j >= 0; --j) {

  1340             vars[j] = mapper.pop();

  1341         }

  1343         if (returnType[0] != 'V') {

  1344             out.append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1345                .append(" = ");

  1346         }

  1348         out.append(vars[0]).append('.');

  1349         out.append(mn);

  1350         out.append('(');

  1351         out.append(vars[0]);

  1352         for (int j = 1; j < numArguments; ++j) {

  1353             out.append(", ");

  1354             out.append(vars[j]);

  1355         }

  1356         out.append(");");

  1357         i += 2;

  1358         return i;

  1359     }

  1361     private void addReference(String cn) throws IOException {

  1362         if (requireReference(cn)) {

  1363             out.append(" /* needs ").append(cn).append(" */");

  1364         }

  1365     }

  1367     private void outType(String d, StringBuilder out) {

  1368         int arr = 0;

  1369         while (d.charAt(0) == '[') {

  1370             out.append('A');

  1371             d = d.substring(1);

  1372         }

  1373         if (d.charAt(0) == 'L') {

  1374             assert d.charAt(d.length() - 1) == ';';

  1375             out.append(d.replace('/', '_').substring(0, d.length() - 1));

  1376         } else {

  1377             out.append(d);

  1378         }

  1379     }

  1381     private String encodeConstant(int entryIndex) throws IOException {

  1382         String[] classRef = { null };

  1383         String s = jc.stringValue(entryIndex, classRef);

  1384         if (classRef[0] != null) {

  1385             addReference(classRef[0]);

  1386             s = accessClass(s.replace('/', '_')) + "(false).constructor.$class";

  1387         }

  1388         return s;

  1389     }

  1391     private String javaScriptBody(String prefix, MethodData m, boolean isStatic) throws IOException {

  1392         byte[] arr = m.findAnnotationData(true);

  1393         if (arr == null) {

  1394             return null;

  1395         }

  1396         final String jvmType = "Lorg/apidesign/bck2brwsr/core/JavaScriptBody;";

  1397         class P extends AnnotationParser {

  1398             public P() {

  1399                 super(false);

  1400             }

  1402             int cnt;

  1403             String[] args = new String[30];

  1404             String body;

  1406             @Override

  1407             protected void visitAttr(String type, String attr, String at, String value) {

  1408                 if (type.equals(jvmType)) {

  1409                     if ("body".equals(attr)) {

  1410                         body = value;

  1411                     } else if ("args".equals(attr)) {

  1412                         args[cnt++] = value;

  1413                     } else {

  1414                         throw new IllegalArgumentException(attr);

  1415                     }

  1416                 }

  1417             }

  1418         }

  1419         P p = new P();

  1420         p.parse(arr, jc);

  1421         if (p.body == null) {

  1422             return null;

  1423         }

  1424         StringBuilder cnt = new StringBuilder();

  1425         final String mn = findMethodName(m, cnt);

  1426         out.append(prefix).append(mn);

  1427         out.append(" = function(");

  1428         String space;

  1429         int index;

  1430         if (!isStatic) {

  1431             space = outputArg(out, p.args, 0);

  1432             index = 1;

  1433         } else {

  1434             space = "";

  1435             index = 0;

  1436         }

  1437         for (int i = 0; i < cnt.length(); i++) {

  1438             out.append(space);

  1439             space = outputArg(out, p.args, index);

  1440             index++;

  1441         }

  1442         out.append(") {").append("\n");

  1443         out.append(p.body);

  1444         out.append("\n}\n");

  1445         return mn;

  1446     }

  1447     private static String className(ClassData jc) {

  1448         //return jc.getName().getInternalName().replace('/', '_');

  1449         return jc.getClassName().replace('/', '_');

  1450     }

  1452     private static String[] findAnnotation(

  1453         byte[] arr, ClassData cd, final String className,

  1454         final String... attrNames

  1455     ) throws IOException {

  1456         if (arr == null) {

  1457             return null;

  1458         }

  1459         final String[] values = new String[attrNames.length];

  1460         final boolean[] found = { false };

  1461         final String jvmType = "L" + className.replace('.', '/') + ";";

  1462         AnnotationParser ap = new AnnotationParser(false) {

  1463             @Override

  1464             protected void visitAttr(String type, String attr, String at, String value) {

  1465                 if (type.equals(jvmType)) {

  1466                     found[0] = true;

  1467                     for (int i = 0; i < attrNames.length; i++) {

  1468                         if (attrNames[i].equals(attr)) {

  1469                             values[i] = value;

  1470                         }

  1471                     }

  1472                 }

  1473             }

  1475         };

  1476         ap.parse(arr, cd);

  1477         return found[0] ? values : null;

  1478     }

  1480     private CharSequence initField(FieldData v) {

  1481         final String is = v.getInternalSig();

  1482         if (is.length() == 1) {

  1483             switch (is.charAt(0)) {

  1484                 case 'S':

  1485                 case 'J':

  1486                 case 'B':

  1487                 case 'Z':

  1488                 case 'C':

  1489                 case 'I': return " = 0;";

  1490                 case 'F':

  1491                 case 'D': return " = 0.0;";

  1492                 default:

  1493                     throw new IllegalStateException(is);

  1494             }

  1495         }

  1496         return " = null;";

  1497     }

  1499     private static void generateAnno(ClassData cd, final Appendable out, byte[] data) throws IOException {

  1500         AnnotationParser ap = new AnnotationParser(true) {

  1501             int anno;

  1502             int cnt;

  1504             @Override

  1505             protected void visitAnnotationStart(String type) throws IOException {

  1506                 if (anno++ > 0) {

  1507                     out.append(",");

  1508                 }

  1509                 out.append('"').append(type).append("\" : {\n");

  1510                 cnt = 0;

  1511             }

  1513             @Override

  1514             protected void visitAnnotationEnd(String type) throws IOException {

  1515                 out.append("\n}\n");

  1516             }

  1518             @Override

  1519             protected void visitAttr(String type, String attr, String attrType, String value)

  1520             throws IOException {

  1521                 if (attr == null) {

  1522                     return;

  1523                 }

  1524                 if (cnt++ > 0) {

  1525                     out.append(",\n");

  1526                 }

  1527                 out.append(attr).append("__").append(attrType).append(" : ").append(value);

  1528             }

  1529         };

  1530         ap.parse(data, cd);

  1531     }

  1533     private static String outputArg(Appendable out, String[] args, int indx) throws IOException {

  1534         final String name = args[indx];

  1535         if (name == null) {

  1536             return "";

  1537         }

  1538         if (name.contains(",")) {

  1539             throw new IOException("Wrong parameter with ',': " + name);

  1540         }

  1541         out.append(name);

  1542         return ",";

  1543     }

  1545     private static void emit(final Appendable out,

  1546                              final String format,

  1547                              final CharSequence... params) throws IOException {

  1548         final int length = format.length();

  1550         int processed = 0;

  1551         int paramOffset = format.indexOf('@');

  1552         while ((paramOffset != -1) && (paramOffset < (length - 1))) {

  1553             final char paramChar = format.charAt(paramOffset + 1);

  1554             if ((paramChar >= '1') && (paramChar <= '9')) {

  1555                 final int paramIndex = paramChar - '0' - 1;

  1557                 out.append(format, processed, paramOffset);

  1558                 out.append(params[paramIndex]);

  1560                 ++paramOffset;

  1561                 processed = paramOffset + 1;

  1562             }

  1564             paramOffset = format.indexOf('@', paramOffset + 1);

  1565         }

  1567         out.append(format, processed, length);

  1568     }

  1569 }

author	Jaroslav Tulach <jaroslav.tulach@apidesign.org>
	Fri, 28 Dec 2012 12:35:32 +0100
changeset 392	44a5802816be
parent 376	059cb07ac9b3
child 397	2adac52f955e
permissions	-rw-r--r--