hg/bck2brwsr: vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java@15cbc8cb2163

     1 /**

     2  * Back 2 Browser Bytecode Translator

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

     4  *

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

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

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

     8  *

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

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

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

    12  * GNU General Public License for more details.

    13  *

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

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

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

    17  */

    18 package org.apidesign.vm4brwsr;

    20 import java.io.IOException;

    21 import java.io.InputStream;

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

    23 import org.apidesign.javap.AnnotationParser;

    24 import org.apidesign.javap.ClassData;

    25 import org.apidesign.javap.FieldData;

    26 import org.apidesign.javap.MethodData;

    27 import org.apidesign.javap.StackMapIterator;

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

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

    31  *

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

    33  */

    34 abstract class ByteCodeToJavaScript {

    35     private ClassData jc;

    36     final Appendable out;

    38     protected ByteCodeToJavaScript(Appendable out) {

    39         this.out = out;

    40     }

    42     /* Collects additional required resources.

    43      *

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

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

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

    47      */

    48     protected abstract boolean requireReference(String internalClassName);

    50     /*

    51      * @param resourcePath name of resources to read

    52      */

    53     protected abstract void requireScript(String resourcePath);

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

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

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

    58      *

    59      * @param className suggested name of the class

    60      */

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

    62         return className + " = ";

    63     }

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

    65         return classOperation;

    66     }

    68     /**

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

    70      *

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

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

    73      *

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

    75      */

    77     public String compile(InputStream classFile) throws IOException {

    78         this.jc = new ClassData(classFile);

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

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

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

    82             "resource", "processByteCode"

    83         );

    84         if (arr != null) {

    85             requireScript(arr[0]);

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

    87                 return null;

    88             }

    89         }

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

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

    92             "container", "prototype"

    93         );

    94         StringArray toInitilize = new StringArray();

    95         final String className = className(jc);

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

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

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

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

   100             if (v.isStatic()) {

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

   102             }

   103         }

   104         if (proto == null) {

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

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

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

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

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

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

   111         } else {

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

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

   114                 proto[0] = "p";

   115             }

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

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

   118         }

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

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

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

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

   123                 "name", "value"

   124             );

   125             if (only != null) {

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

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

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

   129                 }

   130                 continue;

   131             }

   132             String mn;

   133             if (m.isStatic()) {

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

   135             } else {

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

   137             }

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

   139             if (runAnno != null) {

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

   141                 generateAnno(jc, out, runAnno);

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

   143             }

   144         }

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

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

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

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

   149         }

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

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

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

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

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

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

   156         if (classAnno != null) {

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

   158             generateAnno(jc, out, classAnno);

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

   160         }

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

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

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

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

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

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

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

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

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

   170                 "name", "value"

   171             );

   172             if (only != null) {

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

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

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

   176                 }

   177                 continue;

   178             }

   179             if (!v.isStatic()) {

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

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

   182             }

   183         }

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

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

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

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

   188         StringBuilder sb = new StringBuilder();

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

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

   191         }

   192         return sb.toString();

   193     }

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

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

   196         if (jsb != null) {

   197             return jsb;

   198         }

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

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

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

   202         }

   203         generateMethod(prefix, mn, m);

   204         return mn;

   205     }

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

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

   209         if (jsb != null) {

   210             return jsb;

   211         }

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

   213         generateMethod(prefix, mn, m);

   214         return mn;

   215     }

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

   218             throws IOException {

   219         final StackMapIterator stackMapIterator = m.createStackMapIterator();

   220         final LocalsMapper lmapper =

   221                 new LocalsMapper(stackMapIterator.getArguments());

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

   224         lmapper.outputArguments(out);

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

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

   228         if (byteCodes == null) {

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

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

   231             out.append("};");

   232             return;

   233         }

   235         final StackMapper smapper = new StackMapper();

   237         final int maxLocals = m.getMaxLocals();

   238         if (maxLocals > 0) {

   239             // TODO: generate only used local variables

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

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

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

   243                     out.append(", ");

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

   245                 }

   246                 out.append(';');

   247             }

   248         }

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

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

   252         final int maxStack = m.getMaxStack();

   253         if (maxStack > 0) {

   254             // TODO: generate only used stack variables

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

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

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

   258                     out.append(", ");

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

   260                 }

   261                 out.append(';');

   262             }

   263         }

   265         int lastStackFrame = -1;

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

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

   269             int prev = i;

   270             stackMapIterator.advanceTo(i);

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

   272                 lastStackFrame = stackMapIterator.getFrameIndex();

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

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

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

   276             } else {

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

   278             }

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

   280             switch (c) {

   281                 case opc_aload_0:

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

   283                     break;

   284                 case opc_iload_0:

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

   286                     break;

   287                 case opc_lload_0:

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

   289                     break;

   290                 case opc_fload_0:

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

   292                     break;

   293                 case opc_dload_0:

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

   295                     break;

   296                 case opc_aload_1:

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

   298                     break;

   299                 case opc_iload_1:

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

   301                     break;

   302                 case opc_lload_1:

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

   304                     break;

   305                 case opc_fload_1:

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

   307                     break;

   308                 case opc_dload_1:

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

   310                     break;

   311                 case opc_aload_2:

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

   313                     break;

   314                 case opc_iload_2:

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

   316                     break;

   317                 case opc_lload_2:

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

   319                     break;

   320                 case opc_fload_2:

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

   322                     break;

   323                 case opc_dload_2:

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

   325                     break;

   326                 case opc_aload_3:

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

   328                     break;

   329                 case opc_iload_3:

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

   331                     break;

   332                 case opc_lload_3:

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

   334                     break;

   335                 case opc_fload_3:

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

   337                     break;

   338                 case opc_dload_3:

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

   340                     break;

   341                 case opc_iload: {

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

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

   344                     break;

   345                 }

   346                 case opc_lload: {

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

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

   349                     break;

   350                 }

   351                 case opc_fload: {

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

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

   354                     break;

   355                 }

   356                 case opc_dload: {

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

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

   359                     break;

   360                 }

   361                 case opc_aload: {

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

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

   364                     break;

   365                 }

   366                 case opc_istore: {

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

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

   369                     break;

   370                 }

   371                 case opc_lstore: {

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

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

   374                     break;

   375                 }

   376                 case opc_fstore: {

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

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

   379                     break;

   380                 }

   381                 case opc_dstore: {

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

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

   384                     break;

   385                 }

   386                 case opc_astore: {

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

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

   389                     break;

   390                 }

   391                 case opc_astore_0:

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

   393                     break;

   394                 case opc_istore_0:

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

   396                     break;

   397                 case opc_lstore_0:

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

   399                     break;

   400                 case opc_fstore_0:

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

   402                     break;

   403                 case opc_dstore_0:

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

   405                     break;

   406                 case opc_astore_1:

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

   408                     break;

   409                 case opc_istore_1:

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

   411                     break;

   412                 case opc_lstore_1:

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

   414                     break;

   415                 case opc_fstore_1:

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

   417                     break;

   418                 case opc_dstore_1:

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

   420                     break;

   421                 case opc_astore_2:

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

   423                     break;

   424                 case opc_istore_2:

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

   426                     break;

   427                 case opc_lstore_2:

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

   429                     break;

   430                 case opc_fstore_2:

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

   432                     break;

   433                 case opc_dstore_2:

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

   435                     break;

   436                 case opc_astore_3:

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

   438                     break;

   439                 case opc_istore_3:

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

   441                     break;

   442                 case opc_lstore_3:

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

   444                     break;

   445                 case opc_fstore_3:

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

   447                     break;

   448                 case opc_dstore_3:

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

   450                     break;

   451                 case opc_iadd:

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

   453                     break;

   454                 case opc_ladd:

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

   456                     break;

   457                 case opc_fadd:

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

   459                     break;

   460                 case opc_dadd:

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

   462                     break;

   463                 case opc_isub:

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

   465                     break;

   466                 case opc_lsub:

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

   468                     break;

   469                 case opc_fsub:

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

   471                     break;

   472                 case opc_dsub:

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

   474                     break;

   475                 case opc_imul:

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

   477                     break;

   478                 case opc_lmul:

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

   480                     break;

   481                 case opc_fmul:

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

   483                     break;

   484                 case opc_dmul:

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

   486                     break;

   487                 case opc_idiv:

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

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

   490                     break;

   491                 case opc_ldiv:

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

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

   494                     break;

   495                 case opc_fdiv:

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

   497                     break;

   498                 case opc_ddiv:

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

   500                     break;

   501                 case opc_irem:

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

   503                     break;

   504                 case opc_lrem:

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

   506                     break;

   507                 case opc_frem:

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

   509                     break;

   510                 case opc_drem:

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

   512                     break;

   513                 case opc_iand:

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

   515                     break;

   516                 case opc_land:

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

   518                     break;

   519                 case opc_ior:

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

   521                     break;

   522                 case opc_lor:

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

   524                     break;

   525                 case opc_ixor:

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

   527                     break;

   528                 case opc_lxor:

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

   530                     break;

   531                 case opc_ineg:

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

   533                     break;

   534                 case opc_lneg:

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

   536                     break;

   537                 case opc_fneg:

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

   539                     break;

   540                 case opc_dneg:

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

   542                     break;

   543                 case opc_ishl:

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

   545                     break;

   546                 case opc_lshl:

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

   548                     break;

   549                 case opc_ishr:

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

   551                     break;

   552                 case opc_lshr:

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

   554                     break;

   555                 case opc_iushr:

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

   557                     break;

   558                 case opc_lushr:

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

   560                     break;

   561                 case opc_iinc: {

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

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

   564                     if (incrBy == 1) {

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

   566                     } else {

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

   568                              lmapper.getI(varIndx),

   569                              Integer.toString(incrBy));

   570                     }

   571                     break;

   572                 }

   573                 case opc_return:

   574                     emit(out, "return;");

   575                     break;

   576                 case opc_ireturn:

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

   578                     break;

   579                 case opc_lreturn:

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

   581                     break;

   582                 case opc_freturn:

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

   584                     break;

   585                 case opc_dreturn:

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

   587                     break;

   588                 case opc_areturn:

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

   590                     break;

   591                 case opc_i2l:

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

   593                     break;

   594                 case opc_i2f:

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

   596                     break;

   597                 case opc_i2d:

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

   599                     break;

   600                 case opc_l2i:

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

   602                     break;

   603                     // max int check?

   604                 case opc_l2f:

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

   606                     break;

   607                 case opc_l2d:

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

   609                     break;

   610                 case opc_f2d:

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

   612                     break;

   613                 case opc_d2f:

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

   615                     break;

   616                 case opc_f2i:

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

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

   619                     break;

   620                 case opc_f2l:

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

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

   623                     break;

   624                 case opc_d2i:

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

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

   627                     break;

   628                 case opc_d2l:

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

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

   631                     break;

   632                 case opc_i2b:

   633                 case opc_i2c:

   634                 case opc_i2s:

   635                     out.append("/* number conversion */");

   636                     break;

   637                 case opc_aconst_null:

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

   639                     break;

   640                 case opc_iconst_m1:

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

   642                     break;

   643                 case opc_iconst_0:

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

   645                     break;

   646                 case opc_dconst_0:

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

   648                     break;

   649                 case opc_lconst_0:

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

   651                     break;

   652                 case opc_fconst_0:

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

   654                     break;

   655                 case opc_iconst_1:

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

   657                     break;

   658                 case opc_lconst_1:

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

   660                     break;

   661                 case opc_fconst_1:

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

   663                     break;

   664                 case opc_dconst_1:

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

   666                     break;

   667                 case opc_iconst_2:

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

   669                     break;

   670                 case opc_fconst_2:

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

   672                     break;

   673                 case opc_iconst_3:

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

   675                     break;

   676                 case opc_iconst_4:

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

   678                     break;

   679                 case opc_iconst_5:

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

   681                     break;

   682                 case opc_ldc: {

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

   684                     String v = encodeConstant(indx);

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

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

   687                     break;

   688                 }

   689                 case opc_ldc_w:

   690                 case opc_ldc2_w: {

   691                     int indx = readIntArg(byteCodes, i);

   692                     i += 2;

   693                     String v = encodeConstant(indx);

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

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

   696                     break;

   697                 }

   698                 case opc_lcmp:

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

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

   701                     break;

   702                 case opc_fcmpl:

   703                 case opc_fcmpg:

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

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

   706                     break;

   707                 case opc_dcmpl:

   708                 case opc_dcmpg:

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

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

   711                     break;

   712                 case opc_if_acmpeq:

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

   714                                    "===");

   715                     break;

   716                 case opc_if_acmpne:

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

   718                                    "!=");

   719                     break;

   720                 case opc_if_icmpeq:

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

   722                                    "==");

   723                     break;

   724                 case opc_ifeq: {

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

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

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

   728                     i += 2;

   729                     break;

   730                 }

   731                 case opc_ifne: {

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

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

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

   735                     i += 2;

   736                     break;

   737                 }

   738                 case opc_iflt: {

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

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

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

   742                     i += 2;

   743                     break;

   744                 }

   745                 case opc_ifle: {

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

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

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

   749                     i += 2;

   750                     break;

   751                 }

   752                 case opc_ifgt: {

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

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

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

   756                     i += 2;

   757                     break;

   758                 }

   759                 case opc_ifge: {

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

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

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

   763                     i += 2;

   764                     break;

   765                 }

   766                 case opc_ifnonnull: {

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

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

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

   770                     i += 2;

   771                     break;

   772                 }

   773                 case opc_ifnull: {

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

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

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

   777                     i += 2;

   778                     break;

   779                 }

   780                 case opc_if_icmpne:

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

   782                                    "!=");

   783                     break;

   784                 case opc_if_icmplt:

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

   786                                    "<");

   787                     break;

   788                 case opc_if_icmple:

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

   790                                    "<=");

   791                     break;

   792                 case opc_if_icmpgt:

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

   794                                    ">");

   795                     break;

   796                 case opc_if_icmpge:

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

   798                                    ">=");

   799                     break;

   800                 case opc_goto: {

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

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

   803                     i += 2;

   804                     break;

   805                 }

   806                 case opc_lookupswitch: {

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

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

   809                     table += 4;

   810                     int n = readInt4(byteCodes, table);

   811                     table += 4;

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

   813                     while (n-- > 0) {

   814                         int cnstnt = readInt4(byteCodes, table);

   815                         table += 4;

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

   817                         table += 4;

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

   819                     }

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

   821                     i = table - 1;

   822                     break;

   823                 }

   824                 case opc_tableswitch: {

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

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

   827                     table += 4;

   828                     int low = readInt4(byteCodes, table);

   829                     table += 4;

   830                     int high = readInt4(byteCodes, table);

   831                     table += 4;

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

   833                     while (low <= high) {

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

   835                         table += 4;

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

   837                         low++;

   838                     }

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

   840                     i = table - 1;

   841                     break;

   842                 }

   843                 case opc_invokeinterface: {

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

   845                     break;

   846                 }

   847                 case opc_invokevirtual:

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

   849                     break;

   850                 case opc_invokespecial:

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

   852                     break;

   853                 case opc_invokestatic:

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

   855                     break;

   856                 case opc_new: {

   857                     int indx = readIntArg(byteCodes, i);

   858                     String ci = jc.getClassName(indx);

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

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

   861                     addReference(ci);

   862                     i += 2;

   863                     break;

   864                 }

   865                 case opc_newarray:

   866                     ++i; // skip type of array

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

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

   869                     break;

   870                 case opc_anewarray:

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

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

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

   874                     break;

   875                 case opc_multianewarray: {

   876                     i += 2;

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

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

   879                        .append(").fillNulls();");

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

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

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

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

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

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

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

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

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

   889                             append(";");

   890                     }

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

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

   893                     }

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

   895                     break;

   896                 }

   897                 case opc_arraylength:

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

   899                     break;

   900                 case opc_lastore:

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

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

   903                     break;

   904                 case opc_fastore:

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

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

   907                     break;

   908                 case opc_dastore:

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

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

   911                     break;

   912                 case opc_aastore:

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

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

   915                     break;

   916                 case opc_iastore:

   917                 case opc_bastore:

   918                 case opc_castore:

   919                 case opc_sastore:

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

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

   922                     break;

   923                 case opc_laload:

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

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

   926                     break;

   927                 case opc_faload:

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

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

   930                     break;

   931                 case opc_daload:

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

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

   934                     break;

   935                 case opc_aaload:

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

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

   938                     break;

   939                 case opc_iaload:

   940                 case opc_baload:

   941                 case opc_caload:

   942                 case opc_saload:

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

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

   945                     break;

   946                 case opc_pop:

   947                 case opc_pop2:

   948                     smapper.pop(1);

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

   950                     break;

   951                 case opc_dup: {

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

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

   954                     break;

   955                 }

   956                 case opc_dup2: {

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

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

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

   960                     } else {

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

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

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

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

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

   966                     }

   967                     break;

   968                 }

   969                 case opc_dup_x1: {

   970                     final Variable vi1 = smapper.pop();

   971                     final Variable vi2 = smapper.pop();

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

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

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

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

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

   978                     break;

   979                 }

   980                 case opc_dup_x2: {

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

   982                         final Variable vi1 = smapper.pop();

   983                         final Variable vi2 = smapper.pop();

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

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

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

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

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

   990                     } else {

   991                         final Variable vi1 = smapper.pop();

   992                         final Variable vi2 = smapper.pop();

   993                         final Variable vi3 = smapper.pop();

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

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

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

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

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

  1000                              vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);

  1001                     }

  1002                     break;

  1003                 }

  1004                 case opc_bipush:

  1005                     emit(out, "@1 = @2;",

  1006                          smapper.pushI(), Integer.toString(byteCodes[++i]));

  1007                     break;

  1008                 case opc_sipush:

  1009                     emit(out, "@1 = @2;",

  1010                          smapper.pushI(),

  1011                          Integer.toString(readIntArg(byteCodes, i)));

  1012                     i += 2;

  1013                     break;

  1014                 case opc_getfield: {

  1015                     int indx = readIntArg(byteCodes, i);

  1016                     String[] fi = jc.getFieldInfoName(indx);

  1017                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1018                     emit(out, "@2 = @1.fld_@3;",

  1019                          smapper.popA(), smapper.pushT(type), fi[1]);

  1020                     i += 2;

  1021                     break;

  1022                 }

  1023                 case opc_getstatic: {

  1024                     int indx = readIntArg(byteCodes, i);

  1025                     String[] fi = jc.getFieldInfoName(indx);

  1026                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1027                     emit(out, "@1 = @2.@3;",

  1028                          smapper.pushT(type),

  1029                          accessClass(fi[0].replace('/', '_')), fi[1]);

  1030                     i += 2;

  1031                     addReference(fi[0]);

  1032                     break;

  1033                 }

  1034                 case opc_putfield: {

  1035                     int indx = readIntArg(byteCodes, i);

  1036                     String[] fi = jc.getFieldInfoName(indx);

  1037                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1038                     emit(out, "@2.fld_@3 = @1;",

  1039                          smapper.popT(type), smapper.popA(), fi[1]);

  1040                     i += 2;

  1041                     break;

  1042                 }

  1043                 case opc_putstatic: {

  1044                     int indx = readIntArg(byteCodes, i);

  1045                     String[] fi = jc.getFieldInfoName(indx);

  1046                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1047                     emit(out, "@1.@2 = @3;",

  1048                          accessClass(fi[0].replace('/', '_')), fi[1],

  1049                          smapper.popT(type));

  1050                     i += 2;

  1051                     addReference(fi[0]);

  1052                     break;

  1053                 }

  1054                 case opc_checkcast: {

  1055                     int indx = readIntArg(byteCodes, i);

  1056                     final String type = jc.getClassName(indx);

  1057                     if (!type.startsWith("[")) {

  1058                         // no way to check arrays right now

  1059                         // XXX proper exception

  1060                         emit(out,

  1061                              "if (@1 !== null && !@1.$instOf_@2) throw {};",

  1062                              smapper.getA(0), type.replace('/', '_'));

  1063                     }

  1064                     i += 2;

  1065                     break;

  1066                 }

  1067                 case opc_instanceof: {

  1068                     int indx = readIntArg(byteCodes, i);

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

  1070                     emit(out, "@2 = @1.$instOf_@3 ? 1 : 0;",

  1071                          smapper.popA(), smapper.pushI(),

  1072                          type.replace('/', '_'));

  1073                     i += 2;

  1074                     break;

  1075                 }

  1076                 case opc_athrow: {

  1077                     final Variable v = smapper.popA();

  1078                     smapper.clear();

  1080                     emit(out, "{ @1 = @2; throw @2; }",

  1081                          smapper.pushA(), v);

  1082                     break;

  1083                 }

  1085                 case opc_monitorenter: {

  1086                     out.append("/* monitor enter */");

  1087                     smapper.popA();

  1088                     break;

  1089                 }

  1091                 case opc_monitorexit: {

  1092                     out.append("/* monitor exit */");

  1093                     smapper.popA();

  1094                     break;

  1095                 }

  1097                 default: {

  1098                     emit(out, "throw 'unknown bytecode @1';",

  1099                          Integer.toString(c));

  1100                 }

  1101             }

  1102             out.append(" //");

  1103             for (int j = prev; j <= i; j++) {

  1104                 out.append(" ");

  1105                 final int cc = readByte(byteCodes, j);

  1106                 out.append(Integer.toString(cc));

  1107             }

  1108             out.append("\n");

  1109         }

  1110         out.append("  }\n");

  1111         out.append("};");

  1112     }

  1114     private int generateIf(byte[] byteCodes, int i,

  1115                            final Variable v2, final Variable v1,

  1116                            final String test) throws IOException {

  1117         int indx = i + readIntArg(byteCodes, i);

  1118         out.append("if (").append(v1)

  1119            .append(' ').append(test).append(' ')

  1120            .append(v2).append(") { gt = " + indx)

  1121            .append("; continue; }");

  1122         return i + 2;

  1123     }

  1125     private int readIntArg(byte[] byteCodes, int offsetInstruction) {

  1126         final int indxHi = byteCodes[offsetInstruction + 1] << 8;

  1127         final int indxLo = byteCodes[offsetInstruction + 2];

  1128         return (indxHi & 0xffffff00) | (indxLo & 0xff);

  1129     }

  1130     private int readInt4(byte[] byteCodes, int offsetInstruction) {

  1131         final int d = byteCodes[offsetInstruction + 0] << 24;

  1132         final int c = byteCodes[offsetInstruction + 1] << 16;

  1133         final int b = byteCodes[offsetInstruction + 2] << 8;

  1134         final int a = byteCodes[offsetInstruction + 3];

  1135         return (d & 0xff000000) | (c & 0xff0000) | (b & 0xff00) | (a & 0xff);

  1136     }

  1137     private int readByte(byte[] byteCodes, int offsetInstruction) {

  1138         return byteCodes[offsetInstruction] & 0xff;

  1139     }

  1141     private static void countArgs(String descriptor, char[] returnType, StringBuilder sig, StringBuilder cnt) {

  1142         int i = 0;

  1143         Boolean count = null;

  1144         boolean array = false;

  1145         sig.append("__");

  1146         int firstPos = sig.length();

  1147         while (i < descriptor.length()) {

  1148             char ch = descriptor.charAt(i++);

  1149             switch (ch) {

  1150                 case '(':

  1151                     count = true;

  1152                     continue;

  1153                 case ')':

  1154                     count = false;

  1155                     continue;

  1156                 case 'B':

  1157                 case 'C':

  1158                 case 'D':

  1159                 case 'F':

  1160                 case 'I':

  1161                 case 'J':

  1162                 case 'S':

  1163                 case 'Z':

  1164                     if (count) {

  1165                         if (array) {

  1166                             sig.append("_3");

  1167                         }

  1168                         sig.append(ch);

  1169                         if (ch == 'J' || ch == 'D') {

  1170                             cnt.append('1');

  1171                         } else {

  1172                             cnt.append('0');

  1173                         }

  1174                     } else {

  1175                         sig.insert(firstPos, ch);

  1176                         if (array) {

  1177                             returnType[0] = '[';

  1178                             sig.insert(firstPos, "_3");

  1179                         } else {

  1180                             returnType[0] = ch;

  1181                         }

  1182                     }

  1183                     array = false;

  1184                     continue;

  1185                 case 'V':

  1186                     assert !count;

  1187                     returnType[0] = 'V';

  1188                     sig.insert(firstPos, 'V');

  1189                     continue;

  1190                 case 'L':

  1191                     int next = descriptor.indexOf(';', i);

  1192                     String realSig = mangleSig(descriptor, i - 1, next + 1);

  1193                     if (count) {

  1194                         if (array) {

  1195                             sig.append("_3");

  1196                         }

  1197                         sig.append(realSig);

  1198                         cnt.append('0');

  1199                     } else {

  1200                         sig.insert(firstPos, realSig);

  1201                         if (array) {

  1202                             sig.insert(firstPos, "_3");

  1203                         }

  1204                         returnType[0] = 'L';

  1205                     }

  1206                     i = next + 1;

  1207                     continue;

  1208                 case '[':

  1209                     array = true;

  1210                     continue;

  1211                 default:

  1212                     throw new IllegalStateException("Invalid char: " + ch);

  1213             }

  1214         }

  1215     }

  1217     private static String mangleSig(String txt, int first, int last) {

  1218         StringBuilder sb = new StringBuilder();

  1219         for (int i = first; i < last; i++) {

  1220             final char ch = txt.charAt(i);

  1221             switch (ch) {

  1222                 case '/': sb.append('_'); break;

  1223                 case '_': sb.append("_1"); break;

  1224                 case ';': sb.append("_2"); break;

  1225                 case '[': sb.append("_3"); break;

  1226                 default: sb.append(ch); break;

  1227             }

  1228         }

  1229         return sb.toString();

  1230     }

  1232     private static String findMethodName(MethodData m, StringBuilder cnt) {

  1233         StringBuilder name = new StringBuilder();

  1234         if ("<init>".equals(m.getName())) { // NOI18N

  1235             name.append("cons"); // NOI18N

  1236         } else if ("<clinit>".equals(m.getName())) { // NOI18N

  1237             name.append("class"); // NOI18N

  1238         } else {

  1239             name.append(m.getName());

  1240         }

  1242         countArgs(m.getInternalSig(), new char[1], name, cnt);

  1243         return name.toString();

  1244     }

  1246     static String findMethodName(String[] mi, StringBuilder cnt, char[] returnType) {

  1247         StringBuilder name = new StringBuilder();

  1248         String descr = mi[2];//mi.getDescriptor();

  1249         String nm= mi[1];

  1250         if ("<init>".equals(nm)) { // NOI18N

  1251             name.append("cons"); // NOI18N

  1252         } else {

  1253             name.append(nm);

  1254         }

  1255         countArgs(descr, returnType, name, cnt);

  1256         return name.toString();

  1257     }

  1259     private int invokeStaticMethod(byte[] byteCodes, int i, final StackMapper mapper, boolean isStatic)

  1260     throws IOException {

  1261         int methodIndex = readIntArg(byteCodes, i);

  1262         String[] mi = jc.getFieldInfoName(methodIndex);

  1263         char[] returnType = { 'V' };

  1264         StringBuilder cnt = new StringBuilder();

  1265         String mn = findMethodName(mi, cnt, returnType);

  1267         final int numArguments = isStatic ? cnt.length() : cnt.length() + 1;

  1268         final Variable[] vars = new Variable[numArguments];

  1270         for (int j = numArguments - 1; j >= 0; --j) {

  1271             vars[j] = mapper.pop();

  1272         }

  1274         if (returnType[0] != 'V') {

  1275             out.append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1276                .append(" = ");

  1277         }

  1279         final String in = mi[0];

  1280         out.append(accessClass(in.replace('/', '_')));

  1281         out.append("(false).");

  1282         out.append(mn);

  1283         out.append('(');

  1284         if (numArguments > 0) {

  1285             out.append(vars[0]);

  1286             for (int j = 1; j < numArguments; ++j) {

  1287                 out.append(", ");

  1288                 out.append(vars[j]);

  1289             }

  1290         }

  1291         out.append(");");

  1292         i += 2;

  1293         addReference(in);

  1294         return i;

  1295     }

  1296     private int invokeVirtualMethod(byte[] byteCodes, int i, final StackMapper mapper)

  1297     throws IOException {

  1298         int methodIndex = readIntArg(byteCodes, i);

  1299         String[] mi = jc.getFieldInfoName(methodIndex);

  1300         char[] returnType = { 'V' };

  1301         StringBuilder cnt = new StringBuilder();

  1302         String mn = findMethodName(mi, cnt, returnType);

  1304         final int numArguments = cnt.length() + 1;

  1305         final Variable[] vars = new Variable[numArguments];

  1307         for (int j = numArguments - 1; j >= 0; --j) {

  1308             vars[j] = mapper.pop();

  1309         }

  1311         if (returnType[0] != 'V') {

  1312             out.append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1313                .append(" = ");

  1314         }

  1316         out.append(vars[0]).append('.');

  1317         out.append(mn);

  1318         out.append('(');

  1319         out.append(vars[0]);

  1320         for (int j = 1; j < numArguments; ++j) {

  1321             out.append(", ");

  1322             out.append(vars[j]);

  1323         }

  1324         out.append(");");

  1325         i += 2;

  1326         return i;

  1327     }

  1329     private void addReference(String cn) throws IOException {

  1330         if (requireReference(cn)) {

  1331             out.append(" /* needs ").append(cn).append(" */");

  1332         }

  1333     }

  1335     private void outType(String d, StringBuilder out) {

  1336         int arr = 0;

  1337         while (d.charAt(0) == '[') {

  1338             out.append('A');

  1339             d = d.substring(1);

  1340         }

  1341         if (d.charAt(0) == 'L') {

  1342             assert d.charAt(d.length() - 1) == ';';

  1343             out.append(d.replace('/', '_').substring(0, d.length() - 1));

  1344         } else {

  1345             out.append(d);

  1346         }

  1347     }

  1349     private String encodeConstant(int entryIndex) throws IOException {

  1350         String[] classRef = { null };

  1351         String s = jc.stringValue(entryIndex, classRef);

  1352         if (classRef[0] != null) {

  1353             addReference(classRef[0]);

  1354             s = accessClass(s.replace('/', '_')) + "(false).constructor.$class";

  1355         }

  1356         return s;

  1357     }

  1359     private String javaScriptBody(String prefix, MethodData m, boolean isStatic) throws IOException {

  1360         byte[] arr = m.findAnnotationData(true);

  1361         if (arr == null) {

  1362             return null;

  1363         }

  1364         final String jvmType = "Lorg/apidesign/bck2brwsr/core/JavaScriptBody;";

  1365         class P extends AnnotationParser {

  1366             public P() {

  1367                 super(false);

  1368             }

  1370             int cnt;

  1371             String[] args = new String[30];

  1372             String body;

  1374             @Override

  1375             protected void visitAttr(String type, String attr, String at, String value) {

  1376                 if (type.equals(jvmType)) {

  1377                     if ("body".equals(attr)) {

  1378                         body = value;

  1379                     } else if ("args".equals(attr)) {

  1380                         args[cnt++] = value;

  1381                     } else {

  1382                         throw new IllegalArgumentException(attr);

  1383                     }

  1384                 }

  1385             }

  1386         }

  1387         P p = new P();

  1388         p.parse(arr, jc);

  1389         if (p.body == null) {

  1390             return null;

  1391         }

  1392         StringBuilder cnt = new StringBuilder();

  1393         final String mn = findMethodName(m, cnt);

  1394         out.append(prefix).append(mn);

  1395         out.append(" = function(");

  1396         String space;

  1397         int index;

  1398         if (!isStatic) {

  1399             space = outputArg(out, p.args, 0);

  1400             index = 1;

  1401         } else {

  1402             space = "";

  1403             index = 0;

  1404         }

  1405         for (int i = 0; i < cnt.length(); i++) {

  1406             out.append(space);

  1407             space = outputArg(out, p.args, index);

  1408             index++;

  1409         }

  1410         out.append(") {").append("\n");

  1411         out.append(p.body);

  1412         out.append("\n}\n");

  1413         return mn;

  1414     }

  1415     private static String className(ClassData jc) {

  1416         //return jc.getName().getInternalName().replace('/', '_');

  1417         return jc.getClassName().replace('/', '_');

  1418     }

  1420     private static String[] findAnnotation(

  1421         byte[] arr, ClassData cd, final String className,

  1422         final String... attrNames

  1423     ) throws IOException {

  1424         if (arr == null) {

  1425             return null;

  1426         }

  1427         final String[] values = new String[attrNames.length];

  1428         final boolean[] found = { false };

  1429         final String jvmType = "L" + className.replace('.', '/') + ";";

  1430         AnnotationParser ap = new AnnotationParser(false) {

  1431             @Override

  1432             protected void visitAttr(String type, String attr, String at, String value) {

  1433                 if (type.equals(jvmType)) {

  1434                     found[0] = true;

  1435                     for (int i = 0; i < attrNames.length; i++) {

  1436                         if (attrNames[i].equals(attr)) {

  1437                             values[i] = value;

  1438                         }

  1439                     }

  1440                 }

  1441             }

  1443         };

  1444         ap.parse(arr, cd);

  1445         return found[0] ? values : null;

  1446     }

  1448     private CharSequence initField(FieldData v) {

  1449         final String is = v.getInternalSig();

  1450         if (is.length() == 1) {

  1451             switch (is.charAt(0)) {

  1452                 case 'S':

  1453                 case 'J':

  1454                 case 'B':

  1455                 case 'Z':

  1456                 case 'C':

  1457                 case 'I': return " = 0;";

  1458                 case 'F':

  1459                 case 'D': return " = 0.0;";

  1460                 default:

  1461                     throw new IllegalStateException(is);

  1462             }

  1463         }

  1464         return " = null;";

  1465     }

  1467     private static void generateAnno(ClassData cd, final Appendable out, byte[] data) throws IOException {

  1468         AnnotationParser ap = new AnnotationParser(true) {

  1469             int anno;

  1470             int cnt;

  1472             @Override

  1473             protected void visitAnnotationStart(String type) throws IOException {

  1474                 if (anno++ > 0) {

  1475                     out.append(",");

  1476                 }

  1477                 out.append('"').append(type).append("\" : {\n");

  1478                 cnt = 0;

  1479             }

  1481             @Override

  1482             protected void visitAnnotationEnd(String type) throws IOException {

  1483                 out.append("\n}\n");

  1484             }

  1486             @Override

  1487             protected void visitAttr(String type, String attr, String attrType, String value)

  1488             throws IOException {

  1489                 if (attr == null) {

  1490                     return;

  1491                 }

  1492                 if (cnt++ > 0) {

  1493                     out.append(",\n");

  1494                 }

  1495                 out.append(attr).append("__").append(attrType).append(" : ").append(value);

  1496             }

  1497         };

  1498         ap.parse(data, cd);

  1499     }

  1501     private static String outputArg(Appendable out, String[] args, int indx) throws IOException {

  1502         final String name = args[indx];

  1503         if (name == null) {

  1504             return "";

  1505         }

  1506         if (name.contains(",")) {

  1507             throw new IOException("Wrong parameter with ',': " + name);

  1508         }

  1509         out.append(name);

  1510         return ",";

  1511     }

  1513     private static void emit(final Appendable out,

  1514                              final String format,

  1515                              final CharSequence... params) throws IOException {

  1516         final int length = format.length();

  1518         int processed = 0;

  1519         int paramOffset = format.indexOf('@');

  1520         while ((paramOffset != -1) && (paramOffset < (length - 1))) {

  1521             final char paramChar = format.charAt(paramOffset + 1);

  1522             if ((paramChar >= '1') && (paramChar <= '9')) {

  1523                 final int paramIndex = paramChar - '0' - 1;

  1525                 out.append(format, processed, paramOffset);

  1526                 out.append(params[paramIndex]);

  1528                 ++paramOffset;

  1529                 processed = paramOffset + 1;

  1530             }

  1532             paramOffset = format.indexOf('@', paramOffset + 1);

  1533         }

  1535         out.append(format, processed, length);

  1536     }

  1537 }

author	Lubomir Nerad <lubomir.nerad@sun.com>
	Fri, 14 Dec 2012 11:15:37 +0100
branch	registers
changeset 317	15cbc8cb2163
parent 307	eaf4e8387065
parent 316	8da329789435
child 324	46db65995983
permissions	-rw-r--r--