hg/bck2brwsr: vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java@ac05de5a8786

     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     /** Prints out a debug message.

    70      *

    71      * @param msg the message

    72      * @return true if the message has been printed

    73      * @throws IOException

    74      */

    75     boolean debug(String msg) throws IOException {

    76         out.append(msg);

    77         return true;

    78     }

    80     /**

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

    82      *

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

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

    85      *

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

    87      */

    89     public String compile(InputStream classFile) throws IOException {

    90         this.jc = new ClassData(classFile);

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

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

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

    94             );

    95         }

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

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

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

    99             "resource", "processByteCode"

   100         );

   101         if (arr != null) {

   102             requireScript(arr[0]);

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

   104                 return null;

   105             }

   106         }

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

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

   109             "container", "prototype"

   110         );

   111         StringArray toInitilize = new StringArray();

   112         final String className = className(jc);

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

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

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

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

   117             if (v.isStatic()) {

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

   119             }

   120         }

   121         if (proto == null) {

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

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

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

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

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

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

   128         } else {

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

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

   131                 proto[0] = "p";

   132             }

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

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

   135         }

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

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

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

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

   140                 "name", "value"

   141             );

   142             if (only != null) {

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

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

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

   146                 }

   147                 continue;

   148             }

   149             String prefix;

   150             String mn;

   151             if (m.isStatic()) {

   152                 prefix = "\n    c.";

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

   154             } else {

   155                 if (m.isConstructor()) {

   156                     prefix = "\n    CLS.";

   157                     mn = generateInstanceMethod(prefix, m);

   158                 } else {

   159                     prefix = "\n    c.";

   160                     mn = generateInstanceMethod(prefix, m);

   161                 }

   162             }

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

   164             if (runAnno != null) {

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

   166                 generateAnno(jc, out, runAnno);

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

   168             }

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

   170         }

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

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

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

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

   175         }

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

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

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

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

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

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

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

   183         if (classAnno != null) {

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

   185             generateAnno(jc, out, classAnno);

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

   187         }

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

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

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

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

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

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

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

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

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

   197                 "name", "value"

   198             );

   199             if (only != null) {

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

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

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

   203                 }

   204                 continue;

   205             }

   206             if (!v.isStatic()) {

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

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

   209             }

   210         }

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

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

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

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

   215         StringBuilder sb = new StringBuilder();

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

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

   218         }

   219         return sb.toString();

   220     }

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

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

   223         if (jsb != null) {

   224             return jsb;

   225         }

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

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

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

   229         }

   230         generateMethod(prefix, mn, m);

   231         return mn;

   232     }

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

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

   236         if (jsb != null) {

   237             return jsb;

   238         }

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

   240         generateMethod(prefix, mn, m);

   241         return mn;

   242     }

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

   245             throws IOException {

   246         final StackMapIterator stackMapIterator = m.createStackMapIterator();

   247         TrapDataIterator trap = m.getTrapDataIterator();

   248         final LocalsMapper lmapper =

   249                 new LocalsMapper(stackMapIterator.getArguments());

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

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

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

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

   256         if (byteCodes == null) {

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

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

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

   260             out.append("};");

   261             return;

   262         }

   264         final StackMapper smapper = new StackMapper();

   266         final int maxLocals = m.getMaxLocals();

   267         if (maxLocals > 0) {

   268             // TODO: generate only used local variables

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

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

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

   272                     out.append(", ");

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

   274                 }

   275                 out.append(';');

   276             }

   277         }

   278         if (!m.isStatic()) {

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

   280         }

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

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

   284         final int maxStack = m.getMaxStack();

   285         if (maxStack > 0) {

   286             // TODO: generate only used stack variables

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

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

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

   290                     out.append(", ");

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

   292                 }

   293                 out.append(';');

   294             }

   295         }

   297         int lastStackFrame = -1;

   298         TrapData[] previousTrap = null;

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

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

   302             int prev = i;

   303             stackMapIterator.advanceTo(i);

   304             boolean changeInCatch = trap.advanceTo(i);

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

   306                 if (previousTrap != null) {

   307                     generateCatch(previousTrap);

   308                     previousTrap = null;

   309                 }

   310             }

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

   312                 lastStackFrame = stackMapIterator.getFrameIndex();

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

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

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

   316                 changeInCatch = true;

   317             } else {

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

   319             }

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

   321                 out.append("try {");

   322                 previousTrap = trap.current();

   323             }

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

   325             switch (c) {

   326                 case opc_aload_0:

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

   328                     break;

   329                 case opc_iload_0:

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

   331                     break;

   332                 case opc_lload_0:

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

   334                     break;

   335                 case opc_fload_0:

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

   337                     break;

   338                 case opc_dload_0:

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

   340                     break;

   341                 case opc_aload_1:

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

   343                     break;

   344                 case opc_iload_1:

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

   346                     break;

   347                 case opc_lload_1:

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

   349                     break;

   350                 case opc_fload_1:

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

   352                     break;

   353                 case opc_dload_1:

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

   355                     break;

   356                 case opc_aload_2:

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

   358                     break;

   359                 case opc_iload_2:

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

   361                     break;

   362                 case opc_lload_2:

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

   364                     break;

   365                 case opc_fload_2:

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

   367                     break;

   368                 case opc_dload_2:

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

   370                     break;

   371                 case opc_aload_3:

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

   373                     break;

   374                 case opc_iload_3:

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

   376                     break;

   377                 case opc_lload_3:

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

   379                     break;

   380                 case opc_fload_3:

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

   382                     break;

   383                 case opc_dload_3:

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

   385                     break;

   386                 case opc_iload: {

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

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

   389                     break;

   390                 }

   391                 case opc_lload: {

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

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

   394                     break;

   395                 }

   396                 case opc_fload: {

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

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

   399                     break;

   400                 }

   401                 case opc_dload: {

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

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

   404                     break;

   405                 }

   406                 case opc_aload: {

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

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

   409                     break;

   410                 }

   411                 case opc_istore: {

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

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

   414                     break;

   415                 }

   416                 case opc_lstore: {

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

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

   419                     break;

   420                 }

   421                 case opc_fstore: {

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

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

   424                     break;

   425                 }

   426                 case opc_dstore: {

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

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

   429                     break;

   430                 }

   431                 case opc_astore: {

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

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

   434                     break;

   435                 }

   436                 case opc_astore_0:

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

   438                     break;

   439                 case opc_istore_0:

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

   441                     break;

   442                 case opc_lstore_0:

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

   444                     break;

   445                 case opc_fstore_0:

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

   447                     break;

   448                 case opc_dstore_0:

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

   450                     break;

   451                 case opc_astore_1:

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

   453                     break;

   454                 case opc_istore_1:

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

   456                     break;

   457                 case opc_lstore_1:

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

   459                     break;

   460                 case opc_fstore_1:

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

   462                     break;

   463                 case opc_dstore_1:

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

   465                     break;

   466                 case opc_astore_2:

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

   468                     break;

   469                 case opc_istore_2:

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

   471                     break;

   472                 case opc_lstore_2:

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

   474                     break;

   475                 case opc_fstore_2:

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

   477                     break;

   478                 case opc_dstore_2:

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

   480                     break;

   481                 case opc_astore_3:

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

   483                     break;

   484                 case opc_istore_3:

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

   486                     break;

   487                 case opc_lstore_3:

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

   489                     break;

   490                 case opc_fstore_3:

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

   492                     break;

   493                 case opc_dstore_3:

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

   495                     break;

   496                 case opc_iadd:

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

   498                     break;

   499                 case opc_ladd:

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

   501                     break;

   502                 case opc_fadd:

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

   504                     break;

   505                 case opc_dadd:

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

   507                     break;

   508                 case opc_isub:

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

   510                     break;

   511                 case opc_lsub:

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

   513                     break;

   514                 case opc_fsub:

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

   516                     break;

   517                 case opc_dsub:

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

   519                     break;

   520                 case opc_imul:

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

   522                     break;

   523                 case opc_lmul:

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

   525                     break;

   526                 case opc_fmul:

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

   528                     break;

   529                 case opc_dmul:

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

   531                     break;

   532                 case opc_idiv:

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

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

   535                     break;

   536                 case opc_ldiv:

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

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

   539                     break;

   540                 case opc_fdiv:

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

   542                     break;

   543                 case opc_ddiv:

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

   545                     break;

   546                 case opc_irem:

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

   548                     break;

   549                 case opc_lrem:

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

   551                     break;

   552                 case opc_frem:

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

   554                     break;

   555                 case opc_drem:

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

   557                     break;

   558                 case opc_iand:

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

   560                     break;

   561                 case opc_land:

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

   563                     break;

   564                 case opc_ior:

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

   566                     break;

   567                 case opc_lor:

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

   569                     break;

   570                 case opc_ixor:

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

   572                     break;

   573                 case opc_lxor:

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

   575                     break;

   576                 case opc_ineg:

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

   578                     break;

   579                 case opc_lneg:

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

   581                     break;

   582                 case opc_fneg:

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

   584                     break;

   585                 case opc_dneg:

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

   587                     break;

   588                 case opc_ishl:

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

   590                     break;

   591                 case opc_lshl:

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

   593                     break;

   594                 case opc_ishr:

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

   596                     break;

   597                 case opc_lshr:

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

   599                     break;

   600                 case opc_iushr:

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

   602                     break;

   603                 case opc_lushr:

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

   605                     break;

   606                 case opc_iinc: {

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

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

   609                     if (incrBy == 1) {

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

   611                     } else {

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

   613                              lmapper.getI(varIndx),

   614                              Integer.toString(incrBy));

   615                     }

   616                     break;

   617                 }

   618                 case opc_return:

   619                     emit(out, "return;");

   620                     break;

   621                 case opc_ireturn:

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

   623                     break;

   624                 case opc_lreturn:

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

   626                     break;

   627                 case opc_freturn:

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

   629                     break;

   630                 case opc_dreturn:

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

   632                     break;

   633                 case opc_areturn:

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

   635                     break;

   636                 case opc_i2l:

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

   638                     break;

   639                 case opc_i2f:

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

   641                     break;

   642                 case opc_i2d:

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

   644                     break;

   645                 case opc_l2i:

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

   647                     break;

   648                     // max int check?

   649                 case opc_l2f:

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

   651                     break;

   652                 case opc_l2d:

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

   654                     break;

   655                 case opc_f2d:

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

   657                     break;

   658                 case opc_d2f:

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

   660                     break;

   661                 case opc_f2i:

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

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

   664                     break;

   665                 case opc_f2l:

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

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

   668                     break;

   669                 case opc_d2i:

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

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

   672                     break;

   673                 case opc_d2l:

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

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

   676                     break;

   677                 case opc_i2b:

   678                 case opc_i2c:

   679                 case opc_i2s:

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

   681                     break;

   682                 case opc_aconst_null:

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

   684                     break;

   685                 case opc_iconst_m1:

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

   687                     break;

   688                 case opc_iconst_0:

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

   690                     break;

   691                 case opc_dconst_0:

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

   693                     break;

   694                 case opc_lconst_0:

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

   696                     break;

   697                 case opc_fconst_0:

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

   699                     break;

   700                 case opc_iconst_1:

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

   702                     break;

   703                 case opc_lconst_1:

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

   705                     break;

   706                 case opc_fconst_1:

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

   708                     break;

   709                 case opc_dconst_1:

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

   711                     break;

   712                 case opc_iconst_2:

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

   714                     break;

   715                 case opc_fconst_2:

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

   717                     break;

   718                 case opc_iconst_3:

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

   720                     break;

   721                 case opc_iconst_4:

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

   723                     break;

   724                 case opc_iconst_5:

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

   726                     break;

   727                 case opc_ldc: {

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

   729                     String v = encodeConstant(indx);

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

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

   732                     break;

   733                 }

   734                 case opc_ldc_w:

   735                 case opc_ldc2_w: {

   736                     int indx = readIntArg(byteCodes, i);

   737                     i += 2;

   738                     String v = encodeConstant(indx);

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

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

   741                     break;

   742                 }

   743                 case opc_lcmp:

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

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

   746                     break;

   747                 case opc_fcmpl:

   748                 case opc_fcmpg:

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

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

   751                     break;

   752                 case opc_dcmpl:

   753                 case opc_dcmpg:

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

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

   756                     break;

   757                 case opc_if_acmpeq:

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

   759                                    "===");

   760                     break;

   761                 case opc_if_acmpne:

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

   763                                    "!=");

   764                     break;

   765                 case opc_if_icmpeq:

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

   767                                    "==");

   768                     break;

   769                 case opc_ifeq: {

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

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

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

   773                     i += 2;

   774                     break;

   775                 }

   776                 case opc_ifne: {

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

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

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

   780                     i += 2;

   781                     break;

   782                 }

   783                 case opc_iflt: {

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

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

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

   787                     i += 2;

   788                     break;

   789                 }

   790                 case opc_ifle: {

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

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

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

   794                     i += 2;

   795                     break;

   796                 }

   797                 case opc_ifgt: {

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

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

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

   801                     i += 2;

   802                     break;

   803                 }

   804                 case opc_ifge: {

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

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

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

   808                     i += 2;

   809                     break;

   810                 }

   811                 case opc_ifnonnull: {

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

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

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

   815                     i += 2;

   816                     break;

   817                 }

   818                 case opc_ifnull: {

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

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

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

   822                     i += 2;

   823                     break;

   824                 }

   825                 case opc_if_icmpne:

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

   827                                    "!=");

   828                     break;

   829                 case opc_if_icmplt:

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

   831                                    "<");

   832                     break;

   833                 case opc_if_icmple:

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

   835                                    "<=");

   836                     break;

   837                 case opc_if_icmpgt:

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

   839                                    ">");

   840                     break;

   841                 case opc_if_icmpge:

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

   843                                    ">=");

   844                     break;

   845                 case opc_goto: {

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

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

   848                     i += 2;

   849                     break;

   850                 }

   851                 case opc_lookupswitch: {

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

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

   854                     table += 4;

   855                     int n = readInt4(byteCodes, table);

   856                     table += 4;

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

   858                     while (n-- > 0) {

   859                         int cnstnt = readInt4(byteCodes, table);

   860                         table += 4;

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

   862                         table += 4;

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

   864                     }

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

   866                     i = table - 1;

   867                     break;

   868                 }

   869                 case opc_tableswitch: {

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

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

   872                     table += 4;

   873                     int low = readInt4(byteCodes, table);

   874                     table += 4;

   875                     int high = readInt4(byteCodes, table);

   876                     table += 4;

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

   878                     while (low <= high) {

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

   880                         table += 4;

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

   882                         low++;

   883                     }

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

   885                     i = table - 1;

   886                     break;

   887                 }

   888                 case opc_invokeinterface: {

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

   890                     break;

   891                 }

   892                 case opc_invokevirtual:

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

   894                     break;

   895                 case opc_invokespecial:

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

   897                     break;

   898                 case opc_invokestatic:

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

   900                     break;

   901                 case opc_new: {

   902                     int indx = readIntArg(byteCodes, i);

   903                     String ci = jc.getClassName(indx);

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

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

   906                     addReference(ci);

   907                     i += 2;

   908                     break;

   909                 }

   910                 case opc_newarray:

   911                     int atype = readByte(byteCodes, ++i);

   912                     String jvmType;

   913                     switch (atype) {

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

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

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

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

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

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

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

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

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

   923                     }

   924                     emit(out, "@2 = new Array(@1).fillNulls().arrtype('@3');",

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

   926                     break;

   927                 case opc_anewarray: {

   928                     int type = readIntArg(byteCodes, i);

   929                     i += 2;

   930                     String typeName = jc.getClassName(type);

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

   932                         typeName = "[" + typeName;

   933                     } else {

   934                         typeName = "[L" + typeName + ";";

   935                     }

   936                     emit(out, "@2 = new Array(@1).fillNulls().arrtype('@3');",

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

   938                     break;

   939                 }

   940                 case opc_multianewarray: {

   941                     int type = readIntArg(byteCodes, i);

   942                     i += 2;

   943                     String typeName = jc.getClassName(type);

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

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

   946                        .append(").fillNulls().arrtype('").append(typeName).append("');");

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

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

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

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

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

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

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

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

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

   956                             append(";");

   957                     }

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

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

   960                     }

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

   962                     break;

   963                 }

   964                 case opc_arraylength:

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

   966                     break;

   967                 case opc_lastore:

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

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

   970                     break;

   971                 case opc_fastore:

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

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

   974                     break;

   975                 case opc_dastore:

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

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

   978                     break;

   979                 case opc_aastore:

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

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

   982                     break;

   983                 case opc_iastore:

   984                 case opc_bastore:

   985                 case opc_castore:

   986                 case opc_sastore:

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

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

   989                     break;

   990                 case opc_laload:

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

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

   993                     break;

   994                 case opc_faload:

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

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

   997                     break;

   998                 case opc_daload:

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

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

  1001                     break;

  1002                 case opc_aaload:

  1003                     emit(out, "@3 = @2[@1];",

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

  1005                     break;

  1006                 case opc_iaload:

  1007                 case opc_baload:

  1008                 case opc_caload:

  1009                 case opc_saload:

  1010                     emit(out, "@3 = @2[@1];",

  1011                          smapper.popI(), smapper.popA(), smapper.pushI());

  1012                     break;

  1013                 case opc_pop:

  1014                 case opc_pop2:

  1015                     smapper.pop(1);

  1016                     debug("/* pop */");

  1017                     break;

  1018                 case opc_dup: {

  1019                     final Variable v = smapper.get(0);

  1020                     emit(out, "@1 = @2;", smapper.pushT(v.getType()), v);

  1021                     break;

  1022                 }

  1023                 case opc_dup2: {

  1024                     if (smapper.get(0).isCategory2()) {

  1025                         final Variable v = smapper.get(0);

  1026                         emit(out, "@1 = @2;", smapper.pushT(v.getType()), v);

  1027                     } else {

  1028                         final Variable v1 = smapper.get(0);

  1029                         final Variable v2 = smapper.get(1);

  1030                         emit(out, "{ @1 = @2; @3 = @4; }",

  1031                              smapper.pushT(v2.getType()), v2,

  1032                              smapper.pushT(v1.getType()), v1);

  1033                     }

  1034                     break;

  1035                 }

  1036                 case opc_dup_x1: {

  1037                     final Variable vi1 = smapper.pop();

  1038                     final Variable vi2 = smapper.pop();

  1039                     final Variable vo3 = smapper.pushT(vi1.getType());

  1040                     final Variable vo2 = smapper.pushT(vi2.getType());

  1041                     final Variable vo1 = smapper.pushT(vi1.getType());

  1043                     emit(out, "{ @1 = @2; @3 = @4; @5 = @6; }",

  1044                          vo1, vi1, vo2, vi2, vo3, vo1);

  1045                     break;

  1046                 }

  1047                 case opc_dup_x2: {

  1048                     if (smapper.get(1).isCategory2()) {

  1049                         final Variable vi1 = smapper.pop();

  1050                         final Variable vi2 = smapper.pop();

  1051                         final Variable vo3 = smapper.pushT(vi1.getType());

  1052                         final Variable vo2 = smapper.pushT(vi2.getType());

  1053                         final Variable vo1 = smapper.pushT(vi1.getType());

  1055                         emit(out, "{ @1 = @2; @3 = @4; @5 = @6; }",

  1056                              vo1, vi1, vo2, vi2, vo3, vo1);

  1057                     } else {

  1058                         final Variable vi1 = smapper.pop();

  1059                         final Variable vi2 = smapper.pop();

  1060                         final Variable vi3 = smapper.pop();

  1061                         final Variable vo4 = smapper.pushT(vi1.getType());

  1062                         final Variable vo3 = smapper.pushT(vi3.getType());

  1063                         final Variable vo2 = smapper.pushT(vi2.getType());

  1064                         final Variable vo1 = smapper.pushT(vi1.getType());

  1066                         emit(out, "{ @1 = @2; @3 = @4; @5 = @6; @7 = @8; }",

  1067                              vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);

  1068                     }

  1069                     break;

  1070                 }

  1071                 case opc_bipush:

  1072                     emit(out, "@1 = @2;",

  1073                          smapper.pushI(), Integer.toString(byteCodes[++i]));

  1074                     break;

  1075                 case opc_sipush:

  1076                     emit(out, "@1 = @2;",

  1077                          smapper.pushI(),

  1078                          Integer.toString(readIntArg(byteCodes, i)));

  1079                     i += 2;

  1080                     break;

  1081                 case opc_getfield: {

  1082                     int indx = readIntArg(byteCodes, i);

  1083                     String[] fi = jc.getFieldInfoName(indx);

  1084                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1085                     emit(out, "@2 = @1.fld_@3;",

  1086                          smapper.popA(), smapper.pushT(type), fi[1]);

  1087                     i += 2;

  1088                     break;

  1089                 }

  1090                 case opc_getstatic: {

  1091                     int indx = readIntArg(byteCodes, i);

  1092                     String[] fi = jc.getFieldInfoName(indx);

  1093                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1094                     emit(out, "@1 = @2(false).constructor.@3;",

  1095                          smapper.pushT(type),

  1096                          accessClass(fi[0].replace('/', '_')), fi[1]);

  1097                     i += 2;

  1098                     addReference(fi[0]);

  1099                     break;

  1100                 }

  1101                 case opc_putfield: {

  1102                     int indx = readIntArg(byteCodes, i);

  1103                     String[] fi = jc.getFieldInfoName(indx);

  1104                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1105                     emit(out, "@2.fld_@3 = @1;",

  1106                          smapper.popT(type), smapper.popA(), fi[1]);

  1107                     i += 2;

  1108                     break;

  1109                 }

  1110                 case opc_putstatic: {

  1111                     int indx = readIntArg(byteCodes, i);

  1112                     String[] fi = jc.getFieldInfoName(indx);

  1113                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1114                     emit(out, "@1(false).constructor.@2 = @3;",

  1115                          accessClass(fi[0].replace('/', '_')), fi[1],

  1116                          smapper.popT(type));

  1117                     i += 2;

  1118                     addReference(fi[0]);

  1119                     break;

  1120                 }

  1121                 case opc_checkcast: {

  1122                     int indx = readIntArg(byteCodes, i);

  1123                     final String type = jc.getClassName(indx);

  1124                     if (!type.startsWith("[")) {

  1125                         // no way to check arrays right now

  1126                         // XXX proper exception

  1127                         emit(out,

  1128                              "if (@1 !== null && !@1.$instOf_@2) throw {};",

  1129                              smapper.getA(0), type.replace('/', '_'));

  1130                     }

  1131                     i += 2;

  1132                     break;

  1133                 }

  1134                 case opc_instanceof: {

  1135                     int indx = readIntArg(byteCodes, i);

  1136                     final String type = jc.getClassName(indx);

  1137                     emit(out, "@2 = @1.$instOf_@3 ? 1 : 0;",

  1138                          smapper.popA(), smapper.pushI(),

  1139                          type.replace('/', '_'));

  1140                     i += 2;

  1141                     break;

  1142                 }

  1143                 case opc_athrow: {

  1144                     final Variable v = smapper.popA();

  1145                     smapper.clear();

  1147                     emit(out, "{ @1 = @2; throw @2; }",

  1148                          smapper.pushA(), v);

  1149                     break;

  1150                 }

  1152                 case opc_monitorenter: {

  1153                     out.append("/* monitor enter */");

  1154                     smapper.popA();

  1155                     break;

  1156                 }

  1158                 case opc_monitorexit: {

  1159                     out.append("/* monitor exit */");

  1160                     smapper.popA();

  1161                     break;

  1162                 }

  1164                 default: {

  1165                     emit(out, "throw 'unknown bytecode @1';",

  1166                          Integer.toString(c));

  1167                 }

  1168             }

  1169             if (debug(" //")) {

  1170                 for (int j = prev; j <= i; j++) {

  1171                     out.append(" ");

  1172                     final int cc = readByte(byteCodes, j);

  1173                     out.append(Integer.toString(cc));

  1174                 }

  1175             }

  1176             out.append("\n");

  1177         }

  1178         if (previousTrap != null) {

  1179             generateCatch(previousTrap);

  1180         }

  1181         out.append("  }\n");

  1182         out.append("};");

  1183     }

  1185     private int generateIf(byte[] byteCodes, int i,

  1186                            final Variable v2, final Variable v1,

  1187                            final String test) throws IOException {

  1188         int indx = i + readIntArg(byteCodes, i);

  1189         out.append("if (").append(v1)

  1190            .append(' ').append(test).append(' ')

  1191            .append(v2).append(") { gt = " + indx)

  1192            .append("; continue; }");

  1193         return i + 2;

  1194     }

  1196     private int readIntArg(byte[] byteCodes, int offsetInstruction) {

  1197         final int indxHi = byteCodes[offsetInstruction + 1] << 8;

  1198         final int indxLo = byteCodes[offsetInstruction + 2];

  1199         return (indxHi & 0xffffff00) | (indxLo & 0xff);

  1200     }

  1201     private int readInt4(byte[] byteCodes, int offsetInstruction) {

  1202         final int d = byteCodes[offsetInstruction + 0] << 24;

  1203         final int c = byteCodes[offsetInstruction + 1] << 16;

  1204         final int b = byteCodes[offsetInstruction + 2] << 8;

  1205         final int a = byteCodes[offsetInstruction + 3];

  1206         return (d & 0xff000000) | (c & 0xff0000) | (b & 0xff00) | (a & 0xff);

  1207     }

  1208     private int readByte(byte[] byteCodes, int offsetInstruction) {

  1209         return byteCodes[offsetInstruction] & 0xff;

  1210     }

  1212     private static void countArgs(String descriptor, char[] returnType, StringBuilder sig, StringBuilder cnt) {

  1213         int i = 0;

  1214         Boolean count = null;

  1215         boolean array = false;

  1216         sig.append("__");

  1217         int firstPos = sig.length();

  1218         while (i < descriptor.length()) {

  1219             char ch = descriptor.charAt(i++);

  1220             switch (ch) {

  1221                 case '(':

  1222                     count = true;

  1223                     continue;

  1224                 case ')':

  1225                     count = false;

  1226                     continue;

  1227                 case 'B':

  1228                 case 'C':

  1229                 case 'D':

  1230                 case 'F':

  1231                 case 'I':

  1232                 case 'J':

  1233                 case 'S':

  1234                 case 'Z':

  1235                     if (count) {

  1236                         if (array) {

  1237                             sig.append("_3");

  1238                         }

  1239                         sig.append(ch);

  1240                         if (ch == 'J' || ch == 'D') {

  1241                             cnt.append('1');

  1242                         } else {

  1243                             cnt.append('0');

  1244                         }

  1245                     } else {

  1246                         sig.insert(firstPos, ch);

  1247                         if (array) {

  1248                             returnType[0] = '[';

  1249                             sig.insert(firstPos, "_3");

  1250                         } else {

  1251                             returnType[0] = ch;

  1252                         }

  1253                     }

  1254                     array = false;

  1255                     continue;

  1256                 case 'V':

  1257                     assert !count;

  1258                     returnType[0] = 'V';

  1259                     sig.insert(firstPos, 'V');

  1260                     continue;

  1261                 case 'L':

  1262                     int next = descriptor.indexOf(';', i);

  1263                     String realSig = mangleSig(descriptor, i - 1, next + 1);

  1264                     if (count) {

  1265                         if (array) {

  1266                             sig.append("_3");

  1267                         }

  1268                         sig.append(realSig);

  1269                         cnt.append('0');

  1270                     } else {

  1271                         sig.insert(firstPos, realSig);

  1272                         if (array) {

  1273                             sig.insert(firstPos, "_3");

  1274                         }

  1275                         returnType[0] = 'L';

  1276                     }

  1277                     i = next + 1;

  1278                     array = false;

  1279                     continue;

  1280                 case '[':

  1281                     array = true;

  1282                     continue;

  1283                 default:

  1284                     throw new IllegalStateException("Invalid char: " + ch);

  1285             }

  1286         }

  1287     }

  1289     private static String mangleSig(String txt, int first, int last) {

  1290         StringBuilder sb = new StringBuilder();

  1291         for (int i = first; i < last; i++) {

  1292             final char ch = txt.charAt(i);

  1293             switch (ch) {

  1294                 case '/': sb.append('_'); break;

  1295                 case '_': sb.append("_1"); break;

  1296                 case ';': sb.append("_2"); break;

  1297                 case '[': sb.append("_3"); break;

  1298                 default: sb.append(ch); break;

  1299             }

  1300         }

  1301         return sb.toString();

  1302     }

  1304     private static String findMethodName(MethodData m, StringBuilder cnt) {

  1305         StringBuilder name = new StringBuilder();

  1306         if ("<init>".equals(m.getName())) { // NOI18N

  1307             name.append("cons"); // NOI18N

  1308         } else if ("<clinit>".equals(m.getName())) { // NOI18N

  1309             name.append("class"); // NOI18N

  1310         } else {

  1311             name.append(m.getName());

  1312         }

  1314         countArgs(m.getInternalSig(), new char[1], name, cnt);

  1315         return name.toString();

  1316     }

  1318     static String findMethodName(String[] mi, StringBuilder cnt, char[] returnType) {

  1319         StringBuilder name = new StringBuilder();

  1320         String descr = mi[2];//mi.getDescriptor();

  1321         String nm= mi[1];

  1322         if ("<init>".equals(nm)) { // NOI18N

  1323             name.append("cons"); // NOI18N

  1324         } else {

  1325             name.append(nm);

  1326         }

  1327         countArgs(descr, returnType, name, cnt);

  1328         return name.toString();

  1329     }

  1331     private int invokeStaticMethod(byte[] byteCodes, int i, final StackMapper mapper, boolean isStatic)

  1332     throws IOException {

  1333         int methodIndex = readIntArg(byteCodes, i);

  1334         String[] mi = jc.getFieldInfoName(methodIndex);

  1335         char[] returnType = { 'V' };

  1336         StringBuilder cnt = new StringBuilder();

  1337         String mn = findMethodName(mi, cnt, returnType);

  1339         final int numArguments = isStatic ? cnt.length() : cnt.length() + 1;

  1340         final Variable[] vars = new Variable[numArguments];

  1342         for (int j = numArguments - 1; j >= 0; --j) {

  1343             vars[j] = mapper.pop();

  1344         }

  1346         if (returnType[0] != 'V') {

  1347             out.append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1348                .append(" = ");

  1349         }

  1351         final String in = mi[0];

  1352         out.append(accessClass(in.replace('/', '_')));

  1353         out.append("(false).");

  1354         if (mn.startsWith("cons_")) {

  1355             out.append("constructor.");

  1356         }

  1357         out.append(mn);

  1358         if (isStatic) {

  1359             out.append('(');

  1360         } else {

  1361             out.append(".call(");

  1362         }

  1363         if (numArguments > 0) {

  1364             out.append(vars[0]);

  1365             for (int j = 1; j < numArguments; ++j) {

  1366                 out.append(", ");

  1367                 out.append(vars[j]);

  1368             }

  1369         }

  1370         out.append(");");

  1371         i += 2;

  1372         addReference(in);

  1373         return i;

  1374     }

  1375     private int invokeVirtualMethod(byte[] byteCodes, int i, final StackMapper mapper)

  1376     throws IOException {

  1377         int methodIndex = readIntArg(byteCodes, i);

  1378         String[] mi = jc.getFieldInfoName(methodIndex);

  1379         char[] returnType = { 'V' };

  1380         StringBuilder cnt = new StringBuilder();

  1381         String mn = findMethodName(mi, cnt, returnType);

  1383         final int numArguments = cnt.length() + 1;

  1384         final Variable[] vars = new Variable[numArguments];

  1386         for (int j = numArguments - 1; j >= 0; --j) {

  1387             vars[j] = mapper.pop();

  1388         }

  1390         if (returnType[0] != 'V') {

  1391             out.append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1392                .append(" = ");

  1393         }

  1395         out.append(vars[0]).append('.');

  1396         out.append(mn);

  1397         out.append('(');

  1398         String sep = "";

  1399         for (int j = 1; j < numArguments; ++j) {

  1400             out.append(sep);

  1401             out.append(vars[j]);

  1402             sep = ", ";

  1403         }

  1404         out.append(");");

  1405         i += 2;

  1406         return i;

  1407     }

  1409     private void addReference(String cn) throws IOException {

  1410         if (requireReference(cn)) {

  1411             debug(" /* needs " + cn + " */");

  1412         }

  1413     }

  1415     private void outType(String d, StringBuilder out) {

  1416         int arr = 0;

  1417         while (d.charAt(0) == '[') {

  1418             out.append('A');

  1419             d = d.substring(1);

  1420         }

  1421         if (d.charAt(0) == 'L') {

  1422             assert d.charAt(d.length() - 1) == ';';

  1423             out.append(d.replace('/', '_').substring(0, d.length() - 1));

  1424         } else {

  1425             out.append(d);

  1426         }

  1427     }

  1429     private String encodeConstant(int entryIndex) throws IOException {

  1430         String[] classRef = { null };

  1431         String s = jc.stringValue(entryIndex, classRef);

  1432         if (classRef[0] != null) {

  1433             addReference(classRef[0]);

  1434             s = accessClass(s.replace('/', '_')) + "(false).constructor.$class";

  1435         }

  1436         return s;

  1437     }

  1439     private String javaScriptBody(String prefix, MethodData m, boolean isStatic) throws IOException {

  1440         byte[] arr = m.findAnnotationData(true);

  1441         if (arr == null) {

  1442             return null;

  1443         }

  1444         final String jvmType = "Lorg/apidesign/bck2brwsr/core/JavaScriptBody;";

  1445         class P extends AnnotationParser {

  1446             public P() {

  1447                 super(false);

  1448             }

  1450             int cnt;

  1451             String[] args = new String[30];

  1452             String body;

  1454             @Override

  1455             protected void visitAttr(String type, String attr, String at, String value) {

  1456                 if (type.equals(jvmType)) {

  1457                     if ("body".equals(attr)) {

  1458                         body = value;

  1459                     } else if ("args".equals(attr)) {

  1460                         args[cnt++] = value;

  1461                     } else {

  1462                         throw new IllegalArgumentException(attr);

  1463                     }

  1464                 }

  1465             }

  1466         }

  1467         P p = new P();

  1468         p.parse(arr, jc);

  1469         if (p.body == null) {

  1470             return null;

  1471         }

  1472         StringBuilder cnt = new StringBuilder();

  1473         final String mn = findMethodName(m, cnt);

  1474         out.append(prefix).append(mn);

  1475         out.append(" = function(");

  1476         String space = "";

  1477         int index = 0;

  1478         for (int i = 0; i < cnt.length(); i++) {

  1479             out.append(space);

  1480             space = outputArg(out, p.args, index);

  1481             index++;

  1482         }

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

  1484         out.append(p.body);

  1485         out.append("\n}\n");

  1486         return mn;

  1487     }

  1488     private static String className(ClassData jc) {

  1489         //return jc.getName().getInternalName().replace('/', '_');

  1490         return jc.getClassName().replace('/', '_');

  1491     }

  1493     private static String[] findAnnotation(

  1494         byte[] arr, ClassData cd, final String className,

  1495         final String... attrNames

  1496     ) throws IOException {

  1497         if (arr == null) {

  1498             return null;

  1499         }

  1500         final String[] values = new String[attrNames.length];

  1501         final boolean[] found = { false };

  1502         final String jvmType = "L" + className.replace('.', '/') + ";";

  1503         AnnotationParser ap = new AnnotationParser(false) {

  1504             @Override

  1505             protected void visitAttr(String type, String attr, String at, String value) {

  1506                 if (type.equals(jvmType)) {

  1507                     found[0] = true;

  1508                     for (int i = 0; i < attrNames.length; i++) {

  1509                         if (attrNames[i].equals(attr)) {

  1510                             values[i] = value;

  1511                         }

  1512                     }

  1513                 }

  1514             }

  1516         };

  1517         ap.parse(arr, cd);

  1518         return found[0] ? values : null;

  1519     }

  1521     private CharSequence initField(FieldData v) {

  1522         final String is = v.getInternalSig();

  1523         if (is.length() == 1) {

  1524             switch (is.charAt(0)) {

  1525                 case 'S':

  1526                 case 'J':

  1527                 case 'B':

  1528                 case 'Z':

  1529                 case 'C':

  1530                 case 'I': return " = 0;";

  1531                 case 'F':

  1532                 case 'D': return " = 0.0;";

  1533                 default:

  1534                     throw new IllegalStateException(is);

  1535             }

  1536         }

  1537         return " = null;";

  1538     }

  1540     private static void generateAnno(ClassData cd, final Appendable out, byte[] data) throws IOException {

  1541         AnnotationParser ap = new AnnotationParser(true) {

  1542             int anno;

  1543             int cnt;

  1545             @Override

  1546             protected void visitAnnotationStart(String type) throws IOException {

  1547                 if (anno++ > 0) {

  1548                     out.append(",");

  1549                 }

  1550                 out.append('"').append(type).append("\" : {\n");

  1551                 cnt = 0;

  1552             }

  1554             @Override

  1555             protected void visitAnnotationEnd(String type) throws IOException {

  1556                 out.append("\n}\n");

  1557             }

  1559             @Override

  1560             protected void visitAttr(String type, String attr, String attrType, String value)

  1561             throws IOException {

  1562                 if (attr == null) {

  1563                     return;

  1564                 }

  1565                 if (cnt++ > 0) {

  1566                     out.append(",\n");

  1567                 }

  1568                 out.append(attr).append("__").append(attrType).append(" : ").append(value);

  1569             }

  1570         };

  1571         ap.parse(data, cd);

  1572     }

  1574     private static String outputArg(Appendable out, String[] args, int indx) throws IOException {

  1575         final String name = args[indx];

  1576         if (name == null) {

  1577             return "";

  1578         }

  1579         if (name.contains(",")) {

  1580             throw new IOException("Wrong parameter with ',': " + name);

  1581         }

  1582         out.append(name);

  1583         return ",";

  1584     }

  1586     private static void emit(final Appendable out,

  1587                              final String format,

  1588                              final CharSequence... params) throws IOException {

  1589         final int length = format.length();

  1591         int processed = 0;

  1592         int paramOffset = format.indexOf('@');

  1593         while ((paramOffset != -1) && (paramOffset < (length - 1))) {

  1594             final char paramChar = format.charAt(paramOffset + 1);

  1595             if ((paramChar >= '1') && (paramChar <= '9')) {

  1596                 final int paramIndex = paramChar - '0' - 1;

  1598                 out.append(format, processed, paramOffset);

  1599                 out.append(params[paramIndex]);

  1601                 ++paramOffset;

  1602                 processed = paramOffset + 1;

  1603             }

  1605             paramOffset = format.indexOf('@', paramOffset + 1);

  1606         }

  1608         out.append(format, processed, length);

  1609     }

  1611     private void generateCatch(TrapData[] traps) throws IOException {

  1612         out.append("} catch (e) {\n");

  1613         int finallyPC = -1;

  1614         for (TrapData e : traps) {

  1615             if (e == null) {

  1616                 break;

  1617             }

  1618             if (e.catch_cpx != 0) { //not finally

  1619                 final String classInternalName = jc.getClassName(e.catch_cpx);

  1620                 addReference(classInternalName);

  1621                 if ("java/lang/Throwable".equals(classInternalName)) {

  1622                     out.append("if (e.$instOf_java_lang_Throwable) {");

  1623                     out.append("  stA0 = e;");

  1624                     out.append("} else {");

  1625                     out.append("  stA0 = vm.java_lang_Throwable(true);");

  1626                     out.append("  vm.java_lang_Throwable.cons__VLjava_lang_String_2.call(stA0, e.toString());");

  1627                     out.append("}");

  1628                     out.append("gt=" + e.handler_pc + "; continue;");

  1629                 } else {

  1630                     out.append("if (e.$instOf_" + classInternalName.replace('/', '_') + ") {");

  1631                     out.append("gt=" + e.handler_pc + "; stA0 = e; continue;");

  1632                     out.append("}\n");

  1633                 }

  1634             } else {

  1635                 finallyPC = e.handler_pc;

  1636             }

  1637         }

  1638         if (finallyPC == -1) {

  1639             out.append("throw e;");

  1640         } else {

  1641             out.append("gt=" + finallyPC + "; stA0 = e; continue;");

  1642         }

  1643         out.append("\n}");

  1644     }

  1645 }

author	Jaroslav Tulach <jaroslav.tulach@apidesign.org>
	Mon, 14 Jan 2013 18:21:48 +0100
changeset 448	ac05de5a8786
parent 443	9359b006782b
child 453	5aca91d00356
permissions	-rw-r--r--