hg/bck2brwsr: rt/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java@4b09a4b689a4

     1 /**

     2  * Back 2 Browser Bytecode Translator

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

     4  *

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

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

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

     8  *

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

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

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

    12  * GNU General Public License for more details.

    13  *

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

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

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

    17  */

    18 package org.apidesign.vm4brwsr;

    20 import java.io.IOException;

    21 import java.io.InputStream;

    22 import static org.apidesign.vm4brwsr.ByteCodeParser.*;

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

    25  *

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

    27  */

    28 abstract class ByteCodeToJavaScript implements Appendable {

    29     private ClassData jc;

    30     private final Appendable out;

    31     private boolean outChanged;

    32     private boolean callbacks;

    34     protected ByteCodeToJavaScript(Appendable out) {

    35         this.out = out;

    36     }

    38     @Override

    39     public final Appendable append(CharSequence csq) throws IOException {

    40         out.append(csq);

    41         outChanged = true;

    42         return this;

    43     }

    45     @Override

    46     public final Appendable append(CharSequence csq, int start, int end) throws IOException {

    47         out.append(csq, start, end);

    48         outChanged = true;

    49         return this;

    50     }

    52     @Override

    53     public final Appendable append(char c) throws IOException {

    54         out.append(c);

    55         outChanged = true;

    56         return this;

    57     }

    59     /* Collects additional required resources.

    60      *

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

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

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

    64      */

    65     protected abstract boolean requireReference(String internalClassName);

    67     /*

    68      * @param resourcePath name of resources to read

    69      */

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

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

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

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

    75      *

    76      * @param className suggested name of the class

    77      */

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

    79         return className + " = ";

    80     }

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

    82         return classOperation;

    83     }

    85     protected String accessField(String object, String mangledName,

    86                                  String[] fieldInfoName) throws IOException {

    87         return object + "." + mangledName;

    88     }

    90     protected String accessStaticMethod(

    91                              String object,

    92                              String mangledName,

    93                              String[] fieldInfoName) throws IOException {

    94         return object + "." + mangledName;

    95     }

    97     protected String accessVirtualMethod(

    98             String object,

    99             String mangledName,

   100             String[] fieldInfoName,

   101             int params

   102     ) throws IOException {

   103         return object + "." + mangledName + '(';

   104     }

   106     protected void declaredClass(ClassData classData, String mangledName)

   107             throws IOException {

   108     }

   110     protected void declaredField(FieldData fieldData,

   111                                  String destObject,

   112                                  String mangledName) throws IOException {

   113     }

   115     protected void declaredMethod(MethodData methodData,

   116                                   String destObject,

   117                                   String mangledName) throws IOException {

   118     }

   120     /** Prints out a debug message.

   121      *

   122      * @param msg the message

   123      * @return true if the message has been printed

   124      * @throws IOException

   125      */

   126     boolean debug(String msg) throws IOException {

   127         append(msg);

   128         return true;

   129     }

   131     /**

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

   133      *

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

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

   136      *

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

   138      */

   140     public String compile(InputStream classFile) throws IOException {

   141         return compile(new ClassData(classFile));

   142     }

   144     protected String compile(ClassData classData) throws IOException {

   145         this.jc = classData;

   146         this.callbacks = this.jc.getClassName().endsWith("/$JsCallbacks$");

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

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

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

   150             );

   151         }

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

   153         {

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

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

   156                 "resource", "processByteCode"

   157             );

   158             if (arr != null) {

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

   160                     requireScript(arr[0]);

   161                 }

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

   163                     return null;

   164                 }

   165             }

   166         }

   167         {

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

   169                 "net.java.html.js.JavaScriptResource",

   170                 "value"

   171             );

   172             if (arr != null) {

   173                 if (arr[0].startsWith("/")) {

   174                     requireScript(arr[0]);

   175                 } else {

   176                     int last = jc.getClassName().lastIndexOf('/');

   177                     requireScript(

   178                         jc.getClassName().substring(0, last + 1).replace('.', '/') + arr[0]

   179                     );

   180                 }

   181             }

   182         }

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

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

   185             "container", "prototype"

   186         );

   187         StringArray toInitilize = new StringArray();

   188         final String className = className(jc);

   189         append("\n\n").append(assignClass(className));

   190         append("function ").append(className).append("() {");

   191         append("\n  var CLS = ").append(className).append(';');

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

   193         if (proto == null) {

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

   195             append("\n    var pp = ").

   196                 append(accessClass(mangleClassName(sc))).append("(true);");

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

   198             append("\n    var c = p;");

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

   200         } else {

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

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

   203                 proto[0] = "p";

   204             }

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

   206             append("\n    var sprcls = null;");

   207         }

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

   209             if (v.isStatic()) {

   210                 if ((v.access & ACC_FINAL) != 0 && v.hasConstantValue()) {

   211                     if (v.getInternalSig().length() == 1 || v.getInternalSig().equals("Ljava/lang/String;")) {

   212                         continue;

   213                     }

   214                 }

   215                 append("\n  CLS.fld_").append(v.getName()).append(initField(v));

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

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

   218                    .append(" = v; return CLS.fld_").

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

   220             } else {

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

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

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

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

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

   226                    .append("; };");

   227             }

   229             declaredField(v, "c", "_" + v.getName());

   230         }

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

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

   233             if (javaScriptOnly(onlyArr)) continue;

   234             String destObject;

   235             String mn;

   236             append("\n    ");

   237             if (m.isStatic()) {

   238                 destObject = "c";

   239                 mn = generateStaticMethod(destObject, m, toInitilize);

   240             } else {

   241                 if (m.isConstructor()) {

   242                     destObject = "CLS";

   243                     mn = generateInstanceMethod(destObject, m);

   244                 } else {

   245                     destObject = "c";

   246                     mn = generateInstanceMethod(destObject, m);

   247                 }

   248             }

   249             declaredMethod(m, destObject, mn);

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

   251             if (runAnno != null) {

   252                 append("\n    ").append(destObject).append(".").append(mn).append(".anno = {");

   253                 generateAnno(jc, runAnno);

   254                 append("\n    };");

   255             }

   256             append("\n    ").append(destObject).append(".").append(mn).append(".access = " + m.getAccess()).append(";");

   257             append("\n    ").append(destObject).append(".").append(mn).append(".cls = CLS;");

   258         }

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

   260         append("\n    function fillInstOf(x) {");

   261         String instOfName = "$instOf_" + className;

   262         append("\n        Object.defineProperty(x, '").append(instOfName).append("', { value : true });");

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

   264             String intrfc = superInterface.replace('/', '_');

   265             append("\n      vm.").append(intrfc).append("(false)['fillInstOf'](x);");

   266             requireReference(superInterface);

   267         }

   268         append("\n    }");

   269         append("\n    try {");

   270         append("\n      Object.defineProperty(c, 'fillInstOf', { value: fillInstOf });");

   271         append("\n      fillInstOf(c);");

   272         append("\n    } catch (ignore) {");

   273         append("\n    }");

   274 //        obfuscationDelegate.exportJSProperty(this, "c", instOfName);

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

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

   277         append(accessClass("java_lang_Class(true);"));

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

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

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

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

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

   283         if (classAnno != null) {

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

   285             generateAnno(jc, classAnno);

   286             append("\n    };");

   287         }

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

   289             append("\n    ").append(init).append("();");

   290         }

   291         append("\n  }");

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

   293         append("\n    if (!(this instanceof CLS)) {");

   294         append("\n      return new CLS();");

   295         append("\n    }");

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

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

   298             if (javaScriptOnly(onlyArr)) continue;

   299             if (!v.isStatic()) {

   300                 append("\n    this.fld_").

   301                     append(className).append('_').

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

   303             }

   304         }

   305         append("\n    return this;");

   306         append("\n  }");

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

   308         append("\n};");

   310         declaredClass(jc, className);

   312 //        StringBuilder sb = new StringBuilder();

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

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

   315 //        }

   316         return "";

   317     }

   319     private boolean javaScriptOnly(byte[] anno) throws IOException {

   320         String[] only = findAnnotation(anno, jc,

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

   322             "name", "value"

   323         );

   324         if (only != null) {

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

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

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

   328             }

   329             if (ExportedSymbols.isMarkedAsExported(anno, jc)) {

   330                 append("\n    p['").append(only[0]).append("'] = p.")

   331                     .append(only[0]).append(";");

   332             }

   333             return true;

   334         }

   335         return false;

   336     }

   337     private String generateStaticMethod(String destObject, MethodData m, StringArray toInitilize) throws IOException {

   338         String jsb = javaScriptBody(destObject, m, true);

   339         if (jsb != null) {

   340             return jsb;

   341         }

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

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

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

   345         }

   346         generateMethod(destObject, mn, m);

   347         return mn;

   348     }

   350     private String generateInstanceMethod(String destObject, MethodData m) throws IOException {

   351         String jsb = javaScriptBody(destObject, m, false);

   352         if (jsb != null) {

   353             return jsb;

   354         }

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

   356         generateMethod(destObject, mn, m);

   357         return mn;

   358     }

   360     private void generateMethod(String destObject, String name, MethodData m)

   361             throws IOException {

   362         final StackMapIterator stackMapIterator = m.createStackMapIterator();

   363         TrapDataIterator trap = m.getTrapDataIterator();

   364         final LocalsMapper lmapper =

   365                 new LocalsMapper(stackMapIterator.getArguments());

   367         boolean obj = "java/lang/Object".equals(jc.getClassName());

   369         if (obj) {

   370             append("Object.defineProperty(").append(destObject).

   371             append(", '").append(name).append("', { configurable: true, writable: true, value: function(");

   372         } else {

   373             append(destObject).append(".").append(name).append(" = function(");

   374         }

   375         lmapper.outputArguments(this, m.isStatic());

   376         append(") {").append("\n");

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

   379         if (byteCodes == null) {

   380             append("  throw 'no code found for ")

   381                .append(jc.getClassName()).append('.')

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

   383             if (obj) {

   384                 append("}");

   385             }

   386             append("};");

   387             return;

   388         }

   390         final StackMapper smapper = new StackMapper();

   392         if (!m.isStatic()) {

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

   394         }

   396         int lastStackFrame;

   397         TrapData[] previousTrap = null;

   398         boolean wide = false;

   399         boolean didBranches;

   400         if (stackMapIterator.isEmpty()) {

   401             didBranches = false;

   402             lastStackFrame = 0;

   403         } else {

   404             didBranches = true;

   405             lastStackFrame = -1;

   406             append("\n  var gt = 0;\n");

   407         }

   409         int openBraces = 0;

   410         int topMostLabel = 0;

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

   412             int prev = i;

   413             outChanged = false;

   414             stackMapIterator.advanceTo(i);

   415             boolean changeInCatch = trap.advanceTo(i);

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

   417                 if (previousTrap != null) {

   418                     generateCatch(previousTrap, i, topMostLabel);

   419                     previousTrap = null;

   420                 }

   421             }

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

   423                 smapper.flush(this);

   424                 if (i != 0) {

   425                     append("    }\n");

   426                 }

   427                 if (openBraces > 64) {

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

   429                         append("break;}\n");

   430                     }

   431                     openBraces = 1;

   432                     topMostLabel = i;

   433                 }

   435                 lastStackFrame = stackMapIterator.getFrameIndex();

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

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

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

   439                 openBraces++;

   440                 changeInCatch = true;

   441             } else {

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

   443             }

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

   445                 append("try {");

   446                 previousTrap = trap.current();

   447             }

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

   449             switch (c) {

   450                 case opc_aload_0:

   451                     smapper.assign(this, VarType.REFERENCE, lmapper.getA(0));

   452                     break;

   453                 case opc_iload_0:

   454                     smapper.assign(this, VarType.INTEGER, lmapper.getI(0));

   455                     break;

   456                 case opc_lload_0:

   457                     smapper.assign(this, VarType.LONG, lmapper.getL(0));

   458                     break;

   459                 case opc_fload_0:

   460                     smapper.assign(this, VarType.FLOAT, lmapper.getF(0));

   461                     break;

   462                 case opc_dload_0:

   463                     smapper.assign(this, VarType.DOUBLE, lmapper.getD(0));

   464                     break;

   465                 case opc_aload_1:

   466                     smapper.assign(this, VarType.REFERENCE, lmapper.getA(1));

   467                     break;

   468                 case opc_iload_1:

   469                     smapper.assign(this, VarType.INTEGER, lmapper.getI(1));

   470                     break;

   471                 case opc_lload_1:

   472                     smapper.assign(this, VarType.LONG, lmapper.getL(1));

   473                     break;

   474                 case opc_fload_1:

   475                     smapper.assign(this, VarType.FLOAT, lmapper.getF(1));

   476                     break;

   477                 case opc_dload_1:

   478                     smapper.assign(this, VarType.DOUBLE, lmapper.getD(1));

   479                     break;

   480                 case opc_aload_2:

   481                     smapper.assign(this, VarType.REFERENCE, lmapper.getA(2));

   482                     break;

   483                 case opc_iload_2:

   484                     smapper.assign(this, VarType.INTEGER, lmapper.getI(2));

   485                     break;

   486                 case opc_lload_2:

   487                     smapper.assign(this, VarType.LONG, lmapper.getL(2));

   488                     break;

   489                 case opc_fload_2:

   490                     smapper.assign(this, VarType.FLOAT, lmapper.getF(2));

   491                     break;

   492                 case opc_dload_2:

   493                     smapper.assign(this, VarType.DOUBLE, lmapper.getD(2));

   494                     break;

   495                 case opc_aload_3:

   496                     smapper.assign(this, VarType.REFERENCE, lmapper.getA(3));

   497                     break;

   498                 case opc_iload_3:

   499                     smapper.assign(this, VarType.INTEGER, lmapper.getI(3));

   500                     break;

   501                 case opc_lload_3:

   502                     smapper.assign(this, VarType.LONG, lmapper.getL(3));

   503                     break;

   504                 case opc_fload_3:

   505                     smapper.assign(this, VarType.FLOAT, lmapper.getF(3));

   506                     break;

   507                 case opc_dload_3:

   508                     smapper.assign(this, VarType.DOUBLE, lmapper.getD(3));

   509                     break;

   510                 case opc_iload: {

   511                     ++i;

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

   513                                           : readUByte(byteCodes, i);

   514                     wide = false;

   515                     smapper.assign(this, VarType.INTEGER, lmapper.getI(indx));

   516                     break;

   517                 }

   518                 case opc_lload: {

   519                     ++i;

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

   521                                           : readUByte(byteCodes, i);

   522                     wide = false;

   523                     smapper.assign(this, VarType.LONG, lmapper.getL(indx));

   524                     break;

   525                 }

   526                 case opc_fload: {

   527                     ++i;

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

   529                                           : readUByte(byteCodes, i);

   530                     wide = false;

   531                     smapper.assign(this, VarType.FLOAT, lmapper.getF(indx));

   532                     break;

   533                 }

   534                 case opc_dload: {

   535                     ++i;

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

   537                                           : readUByte(byteCodes, i);

   538                     wide = false;

   539                     smapper.assign(this, VarType.DOUBLE, lmapper.getD(indx));

   540                     break;

   541                 }

   542                 case opc_aload: {

   543                     ++i;

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

   545                                           : readUByte(byteCodes, i);

   546                     wide = false;

   547                     smapper.assign(this, VarType.REFERENCE, lmapper.getA(indx));

   548                     break;

   549                 }

   550                 case opc_istore: {

   551                     ++i;

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

   553                                           : readUByte(byteCodes, i);

   554                     wide = false;

   555                     emit(smapper, this, "var @1 = @2;",

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

   557                     break;

   558                 }

   559                 case opc_lstore: {

   560                     ++i;

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

   562                                           : readUByte(byteCodes, i);

   563                     wide = false;

   564                     emit(smapper, this, "var @1 = @2;",

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

   566                     break;

   567                 }

   568                 case opc_fstore: {

   569                     ++i;

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

   571                                           : readUByte(byteCodes, i);

   572                     wide = false;

   573                     emit(smapper, this, "var @1 = @2;",

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

   575                     break;

   576                 }

   577                 case opc_dstore: {

   578                     ++i;

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

   580                                           : readUByte(byteCodes, i);

   581                     wide = false;

   582                     emit(smapper, this, "var @1 = @2;",

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

   584                     break;

   585                 }

   586                 case opc_astore: {

   587                     ++i;

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

   589                                           : readUByte(byteCodes, i);

   590                     wide = false;

   591                     emit(smapper, this, "var @1 = @2;",

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

   593                     break;

   594                 }

   595                 case opc_astore_0:

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

   597                     break;

   598                 case opc_istore_0:

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

   600                     break;

   601                 case opc_lstore_0:

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

   603                     break;

   604                 case opc_fstore_0:

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

   606                     break;

   607                 case opc_dstore_0:

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

   609                     break;

   610                 case opc_astore_1:

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

   612                     break;

   613                 case opc_istore_1:

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

   615                     break;

   616                 case opc_lstore_1:

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

   618                     break;

   619                 case opc_fstore_1:

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

   621                     break;

   622                 case opc_dstore_1:

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

   624                     break;

   625                 case opc_astore_2:

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

   627                     break;

   628                 case opc_istore_2:

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

   630                     break;

   631                 case opc_lstore_2:

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

   633                     break;

   634                 case opc_fstore_2:

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

   636                     break;

   637                 case opc_dstore_2:

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

   639                     break;

   640                 case opc_astore_3:

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

   642                     break;

   643                 case opc_istore_3:

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

   645                     break;

   646                 case opc_lstore_3:

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

   648                     break;

   649                 case opc_fstore_3:

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

   651                     break;

   652                 case opc_dstore_3:

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

   654                     break;

   655                 case opc_iadd:

   656                     smapper.replace(this, VarType.INTEGER, "(@1).add32(@2)", smapper.getI(1), smapper.popI());

   657                     break;

   658                 case opc_ladd:

   659                     smapper.replace(this, VarType.LONG, "(@1).add64(@2)", smapper.getL(1), smapper.popL());

   660                     break;

   661                 case opc_fadd:

   662                     smapper.replace(this, VarType.FLOAT, "(@1 + @2)", smapper.getF(1), smapper.popF());

   663                     break;

   664                 case opc_dadd:

   665                     smapper.replace(this, VarType.DOUBLE, "(@1 + @2)", smapper.getD(1), smapper.popD());

   666                     break;

   667                 case opc_isub:

   668                     smapper.replace(this, VarType.INTEGER, "(@1).sub32(@2)", smapper.getI(1), smapper.popI());

   669                     break;

   670                 case opc_lsub:

   671                     smapper.replace(this, VarType.LONG, "(@1).sub64(@2)", smapper.getL(1), smapper.popL());

   672                     break;

   673                 case opc_fsub:

   674                     smapper.replace(this, VarType.FLOAT, "(@1 - @2)", smapper.getF(1), smapper.popF());

   675                     break;

   676                 case opc_dsub:

   677                     smapper.replace(this, VarType.DOUBLE, "(@1 - @2)", smapper.getD(1), smapper.popD());

   678                     break;

   679                 case opc_imul:

   680                     smapper.replace(this, VarType.INTEGER, "(@1).mul32(@2)", smapper.getI(1), smapper.popI());

   681                     break;

   682                 case opc_lmul:

   683                     smapper.replace(this, VarType.LONG, "(@1).mul64(@2)", smapper.getL(1), smapper.popL());

   684                     break;

   685                 case opc_fmul:

   686                     smapper.replace(this, VarType.FLOAT, "(@1 * @2)", smapper.getF(1), smapper.popF());

   687                     break;

   688                 case opc_dmul:

   689                     smapper.replace(this, VarType.DOUBLE, "(@1 * @2)", smapper.getD(1), smapper.popD());

   690                     break;

   691                 case opc_idiv:

   692                     smapper.replace(this, VarType.INTEGER, "(@1).div32(@2)",

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

   694                     break;

   695                 case opc_ldiv:

   696                     smapper.replace(this, VarType.LONG, "(@1).div64(@2)",

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

   698                     break;

   699                 case opc_fdiv:

   700                     smapper.replace(this, VarType.FLOAT, "(@1 / @2)", smapper.getF(1), smapper.popF());

   701                     break;

   702                 case opc_ddiv:

   703                     smapper.replace(this, VarType.DOUBLE, "(@1 / @2)", smapper.getD(1), smapper.popD());

   704                     break;

   705                 case opc_irem:

   706                     smapper.replace(this, VarType.INTEGER, "(@1).mod32(@2)",

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

   708                     break;

   709                 case opc_lrem:

   710                     smapper.replace(this, VarType.LONG, "(@1).mod64(@2)",

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

   712                     break;

   713                 case opc_frem:

   714                     smapper.replace(this, VarType.FLOAT, "(@1 % @2)", smapper.getF(1), smapper.popF());

   715                     break;

   716                 case opc_drem:

   717                     smapper.replace(this, VarType.DOUBLE, "(@1 % @2)", smapper.getD(1), smapper.popD());

   718                     break;

   719                 case opc_iand:

   720                     smapper.replace(this, VarType.INTEGER, "(@1 & @2)", smapper.getI(1), smapper.popI());

   721                     break;

   722                 case opc_land:

   723                     smapper.replace(this, VarType.LONG, "(@1).and64(@2)", smapper.getL(1), smapper.popL());

   724                     break;

   725                 case opc_ior:

   726                     smapper.replace(this, VarType.INTEGER, "(@1 | @2)", smapper.getI(1), smapper.popI());

   727                     break;

   728                 case opc_lor:

   729                     smapper.replace(this, VarType.LONG, "(@1).or64(@2)", smapper.getL(1), smapper.popL());

   730                     break;

   731                 case opc_ixor:

   732                     smapper.replace(this, VarType.INTEGER, "(@1 ^ @2)", smapper.getI(1), smapper.popI());

   733                     break;

   734                 case opc_lxor:

   735                     smapper.replace(this, VarType.LONG, "(@1).xor64(@2)", smapper.getL(1), smapper.popL());

   736                     break;

   737                 case opc_ineg:

   738                     smapper.replace(this, VarType.INTEGER, "(@1).neg32()", smapper.getI(0));

   739                     break;

   740                 case opc_lneg:

   741                     smapper.replace(this, VarType.LONG, "(@1).neg64()", smapper.getL(0));

   742                     break;

   743                 case opc_fneg:

   744                     smapper.replace(this, VarType.FLOAT, "(-@1)", smapper.getF(0));

   745                     break;

   746                 case opc_dneg:

   747                     smapper.replace(this, VarType.DOUBLE, "(-@1)", smapper.getD(0));

   748                     break;

   749                 case opc_ishl:

   750                     smapper.replace(this, VarType.INTEGER, "(@1 << @2)", smapper.getI(1), smapper.popI());

   751                     break;

   752                 case opc_lshl:

   753                     smapper.replace(this, VarType.LONG, "(@1).shl64(@2)", smapper.getL(1), smapper.popI());

   754                     break;

   755                 case opc_ishr:

   756                     smapper.replace(this, VarType.INTEGER, "(@1 >> @2)", smapper.getI(1), smapper.popI());

   757                     break;

   758                 case opc_lshr:

   759                     smapper.replace(this, VarType.LONG, "(@1).shr64(@2)", smapper.getL(1), smapper.popI());

   760                     break;

   761                 case opc_iushr:

   762                     smapper.replace(this, VarType.INTEGER, "(@1 >>> @2)", smapper.getI(1), smapper.popI());

   763                     break;

   764                 case opc_lushr:

   765                     smapper.replace(this, VarType.LONG, "(@1).ushr64(@2)", smapper.getL(1), smapper.popI());

   766                     break;

   767                 case opc_iinc: {

   768                     ++i;

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

   770                                              : readUByte(byteCodes, i);

   771                     ++i;

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

   773                                             : byteCodes[i];

   774                     wide = false;

   775                     if (incrBy == 1) {

   776                         emit(smapper, this, "@1++;", lmapper.getI(varIndx));

   777                     } else {

   778                         emit(smapper, this, "@1 += @2;",

   779                              lmapper.getI(varIndx),

   780                              Integer.toString(incrBy));

   781                     }

   782                     break;

   783                 }

   784                 case opc_return:

   785                     emit(smapper, this, "return;");

   786                     break;

   787                 case opc_ireturn:

   788                     emit(smapper, this, "return @1;", smapper.popI());

   789                     break;

   790                 case opc_lreturn:

   791                     emit(smapper, this, "return @1;", smapper.popL());

   792                     break;

   793                 case opc_freturn:

   794                     emit(smapper, this, "return @1;", smapper.popF());

   795                     break;

   796                 case opc_dreturn:

   797                     emit(smapper, this, "return @1;", smapper.popD());

   798                     break;

   799                 case opc_areturn:

   800                     emit(smapper, this, "return @1;", smapper.popA());

   801                     break;

   802                 case opc_i2l:

   803                     smapper.replace(this, VarType.LONG, "@1", smapper.getI(0));

   804                     break;

   805                 case opc_i2f:

   806                     smapper.replace(this, VarType.FLOAT, "@1", smapper.getI(0));

   807                     break;

   808                 case opc_i2d:

   809                     smapper.replace(this, VarType.DOUBLE, "@1", smapper.getI(0));

   810                     break;

   811                 case opc_l2i:

   812                     smapper.replace(this, VarType.INTEGER, "(@1).toInt32()", smapper.getL(0));

   813                     break;

   814                     // max int check?

   815                 case opc_l2f:

   816                     smapper.replace(this, VarType.FLOAT, "(@1).toFP()", smapper.getL(0));

   817                     break;

   818                 case opc_l2d:

   819                     smapper.replace(this, VarType.DOUBLE, "(@1).toFP()", smapper.getL(0));

   820                     break;

   821                 case opc_f2d:

   822                     smapper.replace(this, VarType.DOUBLE, "@1",

   823                          smapper.getF(0));

   824                     break;

   825                 case opc_d2f:

   826                     smapper.replace(this, VarType.FLOAT, "@1",

   827                          smapper.getD(0));

   828                     break;

   829                 case opc_f2i:

   830                     smapper.replace(this, VarType.INTEGER, "(@1).toInt32()",

   831                          smapper.getF(0));

   832                     break;

   833                 case opc_f2l:

   834                     smapper.replace(this, VarType.LONG, "(@1).toLong()",

   835                          smapper.getF(0));

   836                     break;

   837                 case opc_d2i:

   838                     smapper.replace(this, VarType.INTEGER, "(@1).toInt32()",

   839                          smapper.getD(0));

   840                     break;

   841                 case opc_d2l:

   842                     smapper.replace(this, VarType.LONG, "(@1).toLong()", smapper.getD(0));

   843                     break;

   844                 case opc_i2b:

   845                     smapper.replace(this, VarType.INTEGER, "(@1).toInt8()", smapper.getI(0));

   846                     break;

   847                 case opc_i2c:

   848                     break;

   849                 case opc_i2s:

   850                     smapper.replace(this, VarType.INTEGER, "(@1).toInt16()", smapper.getI(0));

   851                     break;

   852                 case opc_aconst_null:

   853                     smapper.assign(this, VarType.REFERENCE, "null");

   854                     break;

   855                 case opc_iconst_m1:

   856                     smapper.assign(this, VarType.INTEGER, "-1");

   857                     break;

   858                 case opc_iconst_0:

   859                     smapper.assign(this, VarType.INTEGER, "0");

   860                     break;

   861                 case opc_dconst_0:

   862                     smapper.assign(this, VarType.DOUBLE, "0");

   863                     break;

   864                 case opc_lconst_0:

   865                     smapper.assign(this, VarType.LONG, "0");

   866                     break;

   867                 case opc_fconst_0:

   868                     smapper.assign(this, VarType.FLOAT, "0");

   869                     break;

   870                 case opc_iconst_1:

   871                     smapper.assign(this, VarType.INTEGER, "1");

   872                     break;

   873                 case opc_lconst_1:

   874                     smapper.assign(this, VarType.LONG, "1");

   875                     break;

   876                 case opc_fconst_1:

   877                     smapper.assign(this, VarType.FLOAT, "1");

   878                     break;

   879                 case opc_dconst_1:

   880                     smapper.assign(this, VarType.DOUBLE, "1");

   881                     break;

   882                 case opc_iconst_2:

   883                     smapper.assign(this, VarType.INTEGER, "2");

   884                     break;

   885                 case opc_fconst_2:

   886                     smapper.assign(this, VarType.FLOAT, "2");

   887                     break;

   888                 case opc_iconst_3:

   889                     smapper.assign(this, VarType.INTEGER, "3");

   890                     break;

   891                 case opc_iconst_4:

   892                     smapper.assign(this, VarType.INTEGER, "4");

   893                     break;

   894                 case opc_iconst_5:

   895                     smapper.assign(this, VarType.INTEGER, "5");

   896                     break;

   897                 case opc_ldc: {

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

   899                     String v = encodeConstant(indx);

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

   901                     smapper.assign(this, type, v);

   902                     break;

   903                 }

   904                 case opc_ldc_w:

   905                 case opc_ldc2_w: {

   906                     int indx = readUShortArg(byteCodes, i);

   907                     i += 2;

   908                     String v = encodeConstant(indx);

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

   910                     if (type == VarType.LONG) {

   911                         final Long lv = new Long(v);

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

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

   914                         if (hi == 0) {

   915                             smapper.assign(this, VarType.LONG, "0x" + Integer.toHexString(low));

   916                         } else {

   917                             smapper.assign(this, VarType.LONG,

   918                                 "0x" + Integer.toHexString(hi) + ".next32(0x" +

   919                                     Integer.toHexString(low) + ")"

   920                             );

   921                         }

   922                     } else {

   923                         smapper.assign(this, type, v);

   924                     }

   925                     break;

   926                 }

   927                 case opc_lcmp:

   928                     smapper.replace(this, VarType.INTEGER, "(@2).compare64(@1)", smapper.popL(), smapper.getL(0));

   929                     break;

   930                 case opc_fcmpl:

   931                 case opc_fcmpg:

   932                     smapper.replace(this, VarType.INTEGER, "(@2).compare(@1)", smapper.popF(), smapper.getF(0));

   933                     break;

   934                 case opc_dcmpl:

   935                 case opc_dcmpg:

   936                     smapper.replace(this, VarType.INTEGER, "(@2).compare(@1)", smapper.popD(), smapper.getD(0));

   937                     break;

   938                 case opc_if_acmpeq:

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

   940                                    "===", topMostLabel);

   941                     break;

   942                 case opc_if_acmpne:

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

   944                                    "!==", topMostLabel);

   945                     break;

   946                 case opc_if_icmpeq:

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

   948                                    "==", topMostLabel);

   949                     break;

   950                 case opc_ifeq: {

   951                     int indx = i + readShortArg(byteCodes, i);

   952                     emitIf(smapper, this, "if ((@1) == 0) ",

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

   954                     i += 2;

   955                     break;

   956                 }

   957                 case opc_ifne: {

   958                     int indx = i + readShortArg(byteCodes, i);

   959                     emitIf(smapper, this, "if ((@1) != 0) ",

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

   961                     i += 2;

   962                     break;

   963                 }

   964                 case opc_iflt: {

   965                     int indx = i + readShortArg(byteCodes, i);

   966                     emitIf(smapper, this, "if ((@1) < 0) ",

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

   968                     i += 2;

   969                     break;

   970                 }

   971                 case opc_ifle: {

   972                     int indx = i + readShortArg(byteCodes, i);

   973                     emitIf(smapper, this, "if ((@1) <= 0) ",

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

   975                     i += 2;

   976                     break;

   977                 }

   978                 case opc_ifgt: {

   979                     int indx = i + readShortArg(byteCodes, i);

   980                     emitIf(smapper, this, "if ((@1) > 0) ",

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

   982                     i += 2;

   983                     break;

   984                 }

   985                 case opc_ifge: {

   986                     int indx = i + readShortArg(byteCodes, i);

   987                     emitIf(smapper, this, "if ((@1) >= 0) ",

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

   989                     i += 2;

   990                     break;

   991                 }

   992                 case opc_ifnonnull: {

   993                     int indx = i + readShortArg(byteCodes, i);

   994                     emitIf(smapper, this, "if ((@1) !== null) ",

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

   996                     i += 2;

   997                     break;

   998                 }

   999                 case opc_ifnull: {

  1000                     int indx = i + readShortArg(byteCodes, i);

  1001                     emitIf(smapper, this, "if ((@1) === null) ",

  1002                          smapper.popA(), i, indx, topMostLabel);

  1003                     i += 2;

  1004                     break;

  1005                 }

  1006                 case opc_if_icmpne:

  1007                     i = generateIf(smapper, byteCodes, i, smapper.popI(), smapper.popI(),

  1008                                    "!=", topMostLabel);

  1009                     break;

  1010                 case opc_if_icmplt:

  1011                     i = generateIf(smapper, byteCodes, i, smapper.popI(), smapper.popI(),

  1012                                    "<", topMostLabel);

  1013                     break;

  1014                 case opc_if_icmple:

  1015                     i = generateIf(smapper, byteCodes, i, smapper.popI(), smapper.popI(),

  1016                                    "<=", topMostLabel);

  1017                     break;

  1018                 case opc_if_icmpgt:

  1019                     i = generateIf(smapper, byteCodes, i, smapper.popI(), smapper.popI(),

  1020                                    ">", topMostLabel);

  1021                     break;

  1022                 case opc_if_icmpge:

  1023                     i = generateIf(smapper, byteCodes, i, smapper.popI(), smapper.popI(),

  1024                                    ">=", topMostLabel);

  1025                     break;

  1026                 case opc_goto: {

  1027                     smapper.flush(this);

  1028                     int indx = i + readShortArg(byteCodes, i);

  1029                     goTo(this, i, indx, topMostLabel);

  1030                     i += 2;

  1031                     break;

  1032                 }

  1033                 case opc_lookupswitch: {

  1034                     i = generateLookupSwitch(i, byteCodes, smapper, topMostLabel);

  1035                     break;

  1036                 }

  1037                 case opc_tableswitch: {

  1038                     i = generateTableSwitch(i, byteCodes, smapper, topMostLabel);

  1039                     break;

  1040                 }

  1041                 case opc_invokeinterface: {

  1042                     i = invokeVirtualMethod(byteCodes, i, smapper) + 2;

  1043                     break;

  1044                 }

  1045                 case opc_invokevirtual:

  1046                     i = invokeVirtualMethod(byteCodes, i, smapper);

  1047                     break;

  1048                 case opc_invokespecial:

  1049                     i = invokeStaticMethod(byteCodes, i, smapper, false);

  1050                     break;

  1051                 case opc_invokestatic:

  1052                     i = invokeStaticMethod(byteCodes, i, smapper, true);

  1053                     break;

  1054                 case opc_new: {

  1055                     int indx = readUShortArg(byteCodes, i);

  1056                     String ci = jc.getClassName(indx);

  1057                     emit(smapper, this, "var @1 = new @2;",

  1058                          smapper.pushA(), accessClass(mangleClassName(ci)));

  1059                     addReference(ci);

  1060                     i += 2;

  1061                     break;

  1062                 }

  1063                 case opc_newarray:

  1064                     int atype = readUByte(byteCodes, ++i);

  1065                     generateNewArray(atype, smapper);

  1066                     break;

  1067                 case opc_anewarray: {

  1068                     int type = readUShortArg(byteCodes, i);

  1069                     i += 2;

  1070                     generateANewArray(type, smapper);

  1071                     break;

  1072                 }

  1073                 case opc_multianewarray: {

  1074                     int type = readUShortArg(byteCodes, i);

  1075                     i += 2;

  1076                     i = generateMultiANewArray(type, byteCodes, i, smapper);

  1077                     break;

  1078                 }

  1079                 case opc_arraylength:

  1080                     smapper.replace(this, VarType.INTEGER, "(@1).length", smapper.getA(0));

  1081                     break;

  1082                 case opc_lastore:

  1083                     emit(smapper, this, "Array.at(@3, @2, @1);",

  1084                          smapper.popL(), smapper.popI(), smapper.popA());

  1085                     break;

  1086                 case opc_fastore:

  1087                     emit(smapper, this, "Array.at(@3, @2, @1);",

  1088                          smapper.popF(), smapper.popI(), smapper.popA());

  1089                     break;

  1090                 case opc_dastore:

  1091                     emit(smapper, this, "Array.at(@3, @2, @1);",

  1092                          smapper.popD(), smapper.popI(), smapper.popA());

  1093                     break;

  1094                 case opc_aastore:

  1095                     emit(smapper, this, "Array.at(@3, @2, @1);",

  1096                          smapper.popA(), smapper.popI(), smapper.popA());

  1097                     break;

  1098                 case opc_iastore:

  1099                 case opc_bastore:

  1100                 case opc_castore:

  1101                 case opc_sastore:

  1102                     emit(smapper, this, "Array.at(@3, @2, @1);",

  1103                          smapper.popI(), smapper.popI(), smapper.popA());

  1104                     break;

  1105                 case opc_laload:

  1106                     smapper.replace(this, VarType.LONG, "Array.at(@2, @1)",

  1107                          smapper.popI(), smapper.getA(0));

  1108                     break;

  1109                 case opc_faload:

  1110                     smapper.replace(this, VarType.FLOAT, "Array.at(@2, @1)",

  1111                          smapper.popI(), smapper.getA(0));

  1112                     break;

  1113                 case opc_daload:

  1114                     smapper.replace(this, VarType.DOUBLE, "Array.at(@2, @1)",

  1115                          smapper.popI(), smapper.getA(0));

  1116                     break;

  1117                 case opc_aaload:

  1118                     smapper.replace(this, VarType.REFERENCE, "Array.at(@2, @1)",

  1119                          smapper.popI(), smapper.getA(0));

  1120                     break;

  1121                 case opc_iaload:

  1122                 case opc_baload:

  1123                 case opc_caload:

  1124                 case opc_saload:

  1125                     smapper.replace(this, VarType.INTEGER, "Array.at(@2, @1)",

  1126                          smapper.popI(), smapper.getA(0));

  1127                     break;

  1128                 case opc_pop:

  1129                 case opc_pop2:

  1130                     smapper.pop(1);

  1131                     debug("/* pop */");

  1132                     break;

  1133                 case opc_dup: {

  1134                     final Variable v = smapper.get(0);

  1135                     if (smapper.isDirty()) {

  1136                         emit(smapper, this, "var @1 = @2;", smapper.pushT(v.getType()), v);

  1137                     } else {

  1138                         smapper.assign(this, v.getType(), v);

  1139                     }

  1140                     break;

  1141                 }

  1142                 case opc_dup2: {

  1143                     final Variable vi1 = smapper.get(0);

  1145                     if (vi1.isCategory2()) {

  1146                         emit(smapper, this, "var @1 = @2;",

  1147                              smapper.pushT(vi1.getType()), vi1);

  1148                     } else {

  1149                         final Variable vi2 = smapper.get(1);

  1150                         emit(smapper, this, "var @1 = @2, @3 = @4;",

  1151                              smapper.pushT(vi2.getType()), vi2,

  1152                              smapper.pushT(vi1.getType()), vi1);

  1153                     }

  1154                     break;

  1155                 }

  1156                 case opc_dup_x1: {

  1157                     final Variable vi1 = smapper.pop(this);

  1158                     final Variable vi2 = smapper.pop(this);

  1159                     final Variable vo3 = smapper.pushT(vi1.getType());

  1160                     final Variable vo2 = smapper.pushT(vi2.getType());

  1161                     final Variable vo1 = smapper.pushT(vi1.getType());

  1163                     emit(smapper, this, "var @1 = @2, @3 = @4, @5 = @6;",

  1164                          vo1, vi1, vo2, vi2, vo3, vo1);

  1165                     break;

  1166                 }

  1167                 case opc_dup2_x1: {

  1168                     final Variable vi1 = smapper.pop(this);

  1169                     final Variable vi2 = smapper.pop(this);

  1171                     if (vi1.isCategory2()) {

  1172                         final Variable vo3 = smapper.pushT(vi1.getType());

  1173                         final Variable vo2 = smapper.pushT(vi2.getType());

  1174                         final Variable vo1 = smapper.pushT(vi1.getType());

  1176                         emit(smapper, this, "var @1 = @2, @3 = @4, @5 = @6;",

  1177                              vo1, vi1, vo2, vi2, vo3, vo1);

  1178                     } else {

  1179                         final Variable vi3 = smapper.pop(this);

  1180                         final Variable vo5 = smapper.pushT(vi2.getType());

  1181                         final Variable vo4 = smapper.pushT(vi1.getType());

  1182                         final Variable vo3 = smapper.pushT(vi3.getType());

  1183                         final Variable vo2 = smapper.pushT(vi2.getType());

  1184                         final Variable vo1 = smapper.pushT(vi1.getType());

  1186                         emit(smapper, this, "var @1 = @2, @3 = @4, @5 = @6,",

  1187                              vo1, vi1, vo2, vi2, vo3, vi3);

  1188                         emit(smapper, this, " @1 = @2, @3 = @4;",

  1189                              vo4, vo1, vo5, vo2);

  1190                     }

  1191                     break;

  1192                 }

  1193                 case opc_dup_x2: {

  1194                     final Variable vi1 = smapper.pop(this);

  1195                     final Variable vi2 = smapper.pop(this);

  1197                     if (vi2.isCategory2()) {

  1198                         final Variable vo3 = smapper.pushT(vi1.getType());

  1199                         final Variable vo2 = smapper.pushT(vi2.getType());

  1200                         final Variable vo1 = smapper.pushT(vi1.getType());

  1202                         emit(smapper, this, "var @1 = @2, @3 = @4, @5 = @6;",

  1203                              vo1, vi1, vo2, vi2, vo3, vo1);

  1204                     } else {

  1205                         final Variable vi3 = smapper.pop(this);

  1206                         final Variable vo4 = smapper.pushT(vi1.getType());

  1207                         final Variable vo3 = smapper.pushT(vi3.getType());

  1208                         final Variable vo2 = smapper.pushT(vi2.getType());

  1209                         final Variable vo1 = smapper.pushT(vi1.getType());

  1211                         emit(smapper, this, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8;",

  1212                              vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);

  1213                     }

  1214                     break;

  1215                 }

  1216                 case opc_dup2_x2: {

  1217                     final Variable vi1 = smapper.pop(this);

  1218                     final Variable vi2 = smapper.pop(this);

  1220                     if (vi1.isCategory2()) {

  1221                         if (vi2.isCategory2()) {

  1222                             final Variable vo3 = smapper.pushT(vi1.getType());

  1223                             final Variable vo2 = smapper.pushT(vi2.getType());

  1224                             final Variable vo1 = smapper.pushT(vi1.getType());

  1226                             emit(smapper, this, "var @1 = @2, @3 = @4, @5 = @6;",

  1227                                  vo1, vi1, vo2, vi2, vo3, vo1);

  1228                         } else {

  1229                             final Variable vi3 = smapper.pop(this);

  1230                             final Variable vo4 = smapper.pushT(vi1.getType());

  1231                             final Variable vo3 = smapper.pushT(vi3.getType());

  1232                             final Variable vo2 = smapper.pushT(vi2.getType());

  1233                             final Variable vo1 = smapper.pushT(vi1.getType());

  1235                             emit(smapper, this, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8;",

  1236                                  vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);

  1237                         }

  1238                     } else {

  1239                         final Variable vi3 = smapper.pop(this);

  1241                         if (vi3.isCategory2()) {

  1242                             final Variable vo5 = smapper.pushT(vi2.getType());

  1243                             final Variable vo4 = smapper.pushT(vi1.getType());

  1244                             final Variable vo3 = smapper.pushT(vi3.getType());

  1245                             final Variable vo2 = smapper.pushT(vi2.getType());

  1246                             final Variable vo1 = smapper.pushT(vi1.getType());

  1248                             emit(smapper, this, "var @1 = @2, @3 = @4, @5 = @6,",

  1249                                  vo1, vi1, vo2, vi2, vo3, vi3);

  1250                             emit(smapper, this, " @1 = @2, @3 = @4;",

  1251                                  vo4, vo1, vo5, vo2);

  1252                         } else {

  1253                             final Variable vi4 = smapper.pop(this);

  1254                             final Variable vo6 = smapper.pushT(vi2.getType());

  1255                             final Variable vo5 = smapper.pushT(vi1.getType());

  1256                             final Variable vo4 = smapper.pushT(vi4.getType());

  1257                             final Variable vo3 = smapper.pushT(vi3.getType());

  1258                             final Variable vo2 = smapper.pushT(vi2.getType());

  1259                             final Variable vo1 = smapper.pushT(vi1.getType());

  1261                             emit(smapper, this, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8,",

  1262                                  vo1, vi1, vo2, vi2, vo3, vi3, vo4, vi4);

  1263                             emit(smapper, this, " @1 = @2, @3 = @4;",

  1264                                  vo5, vo1, vo6, vo2);

  1265                         }

  1266                     }

  1267                     break;

  1268                 }

  1269                 case opc_swap: {

  1270                     final Variable vi1 = smapper.get(0);

  1271                     final Variable vi2 = smapper.get(1);

  1273                     if (vi1.getType() == vi2.getType()) {

  1274                         final Variable tmp = smapper.pushT(vi1.getType());

  1276                         emit(smapper, this, "var @1 = @2, @2 = @3, @3 = @1;",

  1277                              tmp, vi1, vi2);

  1278                         smapper.pop(1);

  1279                     } else {

  1280                         smapper.pop(2);

  1281                         smapper.pushT(vi1.getType());

  1282                         smapper.pushT(vi2.getType());

  1283                     }

  1284                     break;

  1285                 }

  1286                 case opc_bipush:

  1287                     smapper.assign(this, VarType.INTEGER,

  1288                         "(" + Integer.toString(byteCodes[++i]) + ")");

  1289                     break;

  1290                 case opc_sipush:

  1291                     smapper.assign(this, VarType.INTEGER,

  1292                         "(" + Integer.toString(readShortArg(byteCodes, i)) + ")"

  1293                     );

  1294                     i += 2;

  1295                     break;

  1296                 case opc_getfield: {

  1297                     int indx = readUShortArg(byteCodes, i);

  1298                     String[] fi = jc.getFieldInfoName(indx);

  1299                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1300                     final String mangleClass = mangleClassName(fi[0]);

  1301                     final String mangleClassAccess = accessClass(mangleClass);

  1302                     smapper.replace(this, type, "@2.call(@1)",

  1303                          smapper.getA(0),

  1304                          accessField(mangleClassAccess + "(false)",

  1305                                      "_" + fi[1], fi)

  1306                     );

  1307                     i += 2;

  1308                     break;

  1309                 }

  1310                 case opc_putfield: {

  1311                     int indx = readUShortArg(byteCodes, i);

  1312                     String[] fi = jc.getFieldInfoName(indx);

  1313                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1314                     final String mangleClass = mangleClassName(fi[0]);

  1315                     final String mangleClassAccess = accessClass(mangleClass);

  1316                     emit(smapper, this, "@3.call(@2, @1);",

  1317                          smapper.popT(type),

  1318                          smapper.popA(),

  1319                          accessField(mangleClassAccess + "(false)",

  1320                                      "_" + fi[1], fi));

  1321                     i += 2;

  1322                     break;

  1323                 }

  1324                 case opc_getstatic: {

  1325                     int indx = readUShortArg(byteCodes, i);

  1326                     String[] fi = jc.getFieldInfoName(indx);

  1327                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1328                     String ac = accessClass(mangleClassName(fi[0]));

  1329                     String af = accessField(ac + "(false)", "_" + fi[1], fi);

  1330                     smapper.assign(this, type, af + "()");

  1331                     i += 2;

  1332                     addReference(fi[0]);

  1333                     break;

  1334                 }

  1335                 case opc_putstatic: {

  1336                     int indx = readUShortArg(byteCodes, i);

  1337                     String[] fi = jc.getFieldInfoName(indx);

  1338                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1339                     emit(smapper, this, "@1(false)._@2(@3);",

  1340                          accessClass(mangleClassName(fi[0])), fi[1],

  1341                          smapper.popT(type));

  1342                     i += 2;

  1343                     addReference(fi[0]);

  1344                     break;

  1345                 }

  1346                 case opc_checkcast: {

  1347                     int indx = readUShortArg(byteCodes, i);

  1348                     generateCheckcast(indx, smapper);

  1349                     i += 2;

  1350                     break;

  1351                 }

  1352                 case opc_instanceof: {

  1353                     int indx = readUShortArg(byteCodes, i);

  1354                     generateInstanceOf(indx, smapper);

  1355                     i += 2;

  1356                     break;

  1357                 }

  1358                 case opc_athrow: {

  1359                     final CharSequence v = smapper.popA();

  1360                     smapper.clear();

  1362                     emit(smapper, this, "{ var @1 = @2; throw @2; }",

  1363                          smapper.pushA(), v);

  1364                     break;

  1365                 }

  1367                 case opc_monitorenter: {

  1368                     debug("/* monitor enter */");

  1369                     smapper.popA();

  1370                     break;

  1371                 }

  1373                 case opc_monitorexit: {

  1374                     debug("/* monitor exit */");

  1375                     smapper.popA();

  1376                     break;

  1377                 }

  1379                 case opc_wide:

  1380                     wide = true;

  1381                     break;

  1383                 default: {

  1384                     wide = false;

  1385                     emit(smapper, this, "throw 'unknown bytecode @1';",

  1386                          Integer.toString(c));

  1387                 }

  1388             }

  1389             if (debug(" //")) {

  1390                 generateByteCodeComment(prev, i, byteCodes);

  1391             }

  1392             if (outChanged) {

  1393                 append("\n");

  1394             }

  1395         }

  1396         if (previousTrap != null) {

  1397             generateCatch(previousTrap, byteCodes.length, topMostLabel);

  1398         }

  1399         if (didBranches) {

  1400             append("\n    }\n");

  1401         }

  1402         while (openBraces-- > 0) {

  1403             append('}');

  1404         }

  1405         if (obj) {

  1406             append("\n}});");

  1407         } else {

  1408             append("\n};");

  1409         }

  1410     }

  1412     private int generateIf(StackMapper mapper, byte[] byteCodes,

  1413         int i, final CharSequence v2, final CharSequence v1,

  1414         final String test, int topMostLabel

  1415     ) throws IOException {

  1416         mapper.flush(this);

  1417         int indx = i + readShortArg(byteCodes, i);

  1418         append("if ((").append(v1)

  1419            .append(") ").append(test).append(" (")

  1420            .append(v2).append(")) ");

  1421         goTo(this, i, indx, topMostLabel);

  1422         return i + 2;

  1423     }

  1425     private int readInt4(byte[] byteCodes, int offset) {

  1426         final int d = byteCodes[offset + 0] << 24;

  1427         final int c = byteCodes[offset + 1] << 16;

  1428         final int b = byteCodes[offset + 2] << 8;

  1429         final int a = byteCodes[offset + 3];

  1430         return (d & 0xff000000) | (c & 0xff0000) | (b & 0xff00) | (a & 0xff);

  1431     }

  1432     private static int readUByte(byte[] byteCodes, int offset) {

  1433         return byteCodes[offset] & 0xff;

  1434     }

  1436     private static int readUShort(byte[] byteCodes, int offset) {

  1437         return ((byteCodes[offset] & 0xff) << 8)

  1438                     | (byteCodes[offset + 1] & 0xff);

  1439     }

  1440     private static int readUShortArg(byte[] byteCodes, int offsetInstruction) {

  1441         return readUShort(byteCodes, offsetInstruction + 1);

  1442     }

  1444     private static int readShort(byte[] byteCodes, int offset) {

  1445         int signed = byteCodes[offset];

  1446         byte b0 = (byte)signed;

  1447         return (b0 << 8) | (byteCodes[offset + 1] & 0xff);

  1448     }

  1449     private static int readShortArg(byte[] byteCodes, int offsetInstruction) {

  1450         return readShort(byteCodes, offsetInstruction + 1);

  1451     }

  1453     private static void countArgs(String descriptor, char[] returnType, StringBuilder sig, StringBuilder cnt) {

  1454         int i = 0;

  1455         Boolean count = null;

  1456         boolean array = false;

  1457         sig.append("__");

  1458         int firstPos = sig.length();

  1459         while (i < descriptor.length()) {

  1460             char ch = descriptor.charAt(i++);

  1461             switch (ch) {

  1462                 case '(':

  1463                     count = true;

  1464                     continue;

  1465                 case ')':

  1466                     count = false;

  1467                     continue;

  1468                 case 'B':

  1469                 case 'C':

  1470                 case 'D':

  1471                 case 'F':

  1472                 case 'I':

  1473                 case 'J':

  1474                 case 'S':

  1475                 case 'Z':

  1476                     if (count) {

  1477                         if (array) {

  1478                             sig.append("_3");

  1479                         }

  1480                         sig.append(ch);

  1481                         if (ch == 'J' || ch == 'D') {

  1482                             cnt.append('1');

  1483                         } else {

  1484                             cnt.append('0');

  1485                         }

  1486                     } else {

  1487                         sig.insert(firstPos, ch);

  1488                         if (array) {

  1489                             returnType[0] = '[';

  1490                             sig.insert(firstPos, "_3");

  1491                         } else {

  1492                             returnType[0] = ch;

  1493                         }

  1494                     }

  1495                     array = false;

  1496                     continue;

  1497                 case 'V':

  1498                     assert !count;

  1499                     returnType[0] = 'V';

  1500                     sig.insert(firstPos, 'V');

  1501                     continue;

  1502                 case 'L':

  1503                     int next = descriptor.indexOf(';', i);

  1504                     String realSig = mangleSig(descriptor, i - 1, next + 1);

  1505                     if (count) {

  1506                         if (array) {

  1507                             sig.append("_3");

  1508                         }

  1509                         sig.append(realSig);

  1510                         cnt.append('0');

  1511                     } else {

  1512                         sig.insert(firstPos, realSig);

  1513                         if (array) {

  1514                             sig.insert(firstPos, "_3");

  1515                         }

  1516                         returnType[0] = 'L';

  1517                     }

  1518                     i = next + 1;

  1519                     array = false;

  1520                     continue;

  1521                 case '[':

  1522                     array = true;

  1523                     continue;

  1524                 default:

  1525                     throw new IllegalStateException("Invalid char: " + ch);

  1526             }

  1527         }

  1528     }

  1530     static String mangleSig(String sig) {

  1531         return mangleSig(sig, 0, sig.length());

  1532     }

  1534     private static String mangleMethodName(String name) {

  1535         StringBuilder sb = new StringBuilder(name.length() * 2);

  1536         int last = name.length();

  1537         for (int i = 0; i < last; i++) {

  1538             final char ch = name.charAt(i);

  1539             switch (ch) {

  1540                 case '_': sb.append("_1"); break;

  1541                 default: sb.append(ch); break;

  1542             }

  1543         }

  1544         return sb.toString();

  1545     }

  1546     private static String mangleSig(String txt, int first, int last) {

  1547         StringBuilder sb = new StringBuilder((last - first) * 2);

  1548         for (int i = first; i < last; i++) {

  1549             final char ch = txt.charAt(i);

  1550             switch (ch) {

  1551                 case '/': sb.append('_'); break;

  1552                 case '_': sb.append("_1"); break;

  1553                 case ';': sb.append("_2"); break;

  1554                 case '[': sb.append("_3"); break;

  1555                 default:

  1556                     if (Character.isJavaIdentifierPart(ch)) {

  1557                         sb.append(ch);

  1558                     } else {

  1559                         sb.append("_0");

  1560                         String hex = Integer.toHexString(ch).toLowerCase();

  1561                         for (int m = hex.length(); m < 4; m++) {

  1562                             sb.append("0");

  1563                         }

  1564                         sb.append(hex);

  1565                     }

  1566                 break;

  1567             }

  1568         }

  1569         return sb.toString();

  1570     }

  1572     private static String mangleClassName(String name) {

  1573         return mangleSig(name);

  1574     }

  1576     private static String findMethodName(MethodData m, StringBuilder cnt) {

  1577         StringBuilder name = new StringBuilder();

  1578         if ("<init>".equals(m.getName())) { // NOI18N

  1579             name.append("cons"); // NOI18N

  1580         } else if ("<clinit>".equals(m.getName())) { // NOI18N

  1581             name.append("class"); // NOI18N

  1582         } else {

  1583             name.append(mangleMethodName(m.getName()));

  1584         }

  1586         countArgs(m.getInternalSig(), new char[1], name, cnt);

  1587         return name.toString();

  1588     }

  1590     static String findMethodName(String[] mi, StringBuilder cnt, char[] returnType) {

  1591         StringBuilder name = new StringBuilder();

  1592         String descr = mi[2];//mi.getDescriptor();

  1593         String nm= mi[1];

  1594         if ("<init>".equals(nm)) { // NOI18N

  1595             name.append("cons"); // NOI18N

  1596         } else {

  1597             name.append(mangleMethodName(nm));

  1598         }

  1599         countArgs(descr, returnType, name, cnt);

  1600         return name.toString();

  1601     }

  1603     private int invokeStaticMethod(byte[] byteCodes, int i, final StackMapper mapper, boolean isStatic)

  1604     throws IOException {

  1605         int methodIndex = readUShortArg(byteCodes, i);

  1606         String[] mi = jc.getFieldInfoName(methodIndex);

  1607         char[] returnType = { 'V' };

  1608         StringBuilder cnt = new StringBuilder();

  1609         String mn = findMethodName(mi, cnt, returnType);

  1611         final int numArguments = isStatic ? cnt.length() : cnt.length() + 1;

  1612         final CharSequence[] vars = new CharSequence[numArguments];

  1614         for (int j = numArguments - 1; j >= 0; --j) {

  1615             vars[j] = mapper.popValue();

  1616         }

  1618         if (returnType[0] != 'V') {

  1619             mapper.flush(this);

  1620             append("var ")

  1621                .append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1622                .append(" = ");

  1623         }

  1625         final String in = mi[0];

  1626         String mcn;

  1627         if (callbacks && in.equals("org/apidesign/html/boot/spi/Fn")) {

  1628             mcn = "java_lang_Class";

  1629         } else {

  1630             mcn = mangleClassName(in);

  1631         }

  1632         String object = accessClass(mcn) + "(false)";

  1633         if (mn.startsWith("cons_")) {

  1634             object += ".constructor";

  1635         }

  1636         append(accessStaticMethod(object, mn, mi));

  1637         if (isStatic) {

  1638             append('(');

  1639         } else {

  1640             append(".call(");

  1641         }

  1642         if (numArguments > 0) {

  1643             append(vars[0]);

  1644             for (int j = 1; j < numArguments; ++j) {

  1645                 append(", ");

  1646                 append(vars[j]);

  1647             }

  1648         }

  1649         append(");");

  1650         i += 2;

  1651         addReference(in);

  1652         return i;

  1653     }

  1654     private int invokeVirtualMethod(byte[] byteCodes, int i, final StackMapper mapper)

  1655     throws IOException {

  1656         int methodIndex = readUShortArg(byteCodes, i);

  1657         String[] mi = jc.getFieldInfoName(methodIndex);

  1658         char[] returnType = { 'V' };

  1659         StringBuilder cnt = new StringBuilder();

  1660         String mn = findMethodName(mi, cnt, returnType);

  1662         final int numArguments = cnt.length() + 1;

  1663         final CharSequence[] vars = new CharSequence[numArguments];

  1665         for (int j = numArguments - 1; j >= 0; --j) {

  1666             vars[j] = mapper.popValue();

  1667         }

  1669         if (returnType[0] != 'V') {

  1670             append("var ")

  1671                .append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1672                .append(" = ");

  1673         }

  1675         append(accessVirtualMethod(vars[0].toString(), mn, mi, numArguments));

  1676         String sep = "";

  1677         for (int j = 1; j < numArguments; ++j) {

  1678             append(sep);

  1679             append(vars[j]);

  1680             sep = ", ";

  1681         }

  1682         append(");");

  1683         i += 2;

  1684         return i;

  1685     }

  1687     private void addReference(String cn) throws IOException {

  1688         if (requireReference(cn)) {

  1689             debug(" /* needs " + cn + " */");

  1690         }

  1691     }

  1693     private void outType(String d, StringBuilder out) {

  1694         int arr = 0;

  1695         while (d.charAt(0) == '[') {

  1696             out.append('A');

  1697             d = d.substring(1);

  1698         }

  1699         if (d.charAt(0) == 'L') {

  1700             assert d.charAt(d.length() - 1) == ';';

  1701             out.append(d.replace('/', '_').substring(0, d.length() - 1));

  1702         } else {

  1703             out.append(d);

  1704         }

  1705     }

  1707     private String encodeConstant(int entryIndex) throws IOException {

  1708         String[] classRef = { null };

  1709         String s = jc.stringValue(entryIndex, classRef);

  1710         if (classRef[0] != null) {

  1711             if (classRef[0].startsWith("[")) {

  1712                 s = accessClass("java_lang_Class") + "(false)['forName__Ljava_lang_Class_2Ljava_lang_String_2']('" + classRef[0] + "')";

  1713             } else {

  1714                 addReference(classRef[0]);

  1715                 s = accessClass(mangleClassName(s)) + "(false).constructor.$class";

  1716             }

  1717         }

  1718         return s;

  1719     }

  1721     private String javaScriptBody(String destObject, MethodData m, boolean isStatic) throws IOException {

  1722         byte[] arr = m.findAnnotationData(true);

  1723         if (arr == null) {

  1724             return null;

  1725         }

  1726         final String jvmType = "Lorg/apidesign/bck2brwsr/core/JavaScriptBody;";

  1727         final String htmlType = "Lnet/java/html/js/JavaScriptBody;";

  1728         class P extends AnnotationParser {

  1729             public P() {

  1730                 super(false, true);

  1731             }

  1733             int cnt;

  1734             String[] args = new String[30];

  1735             String body;

  1736             boolean javacall;

  1737             boolean html4j;

  1739             @Override

  1740             protected void visitAttr(String type, String attr, String at, String value) {

  1741                 if (type.equals(jvmType)) {

  1742                     if ("body".equals(attr)) {

  1743                         body = value;

  1744                     } else if ("args".equals(attr)) {

  1745                         args[cnt++] = value;

  1746                     } else {

  1747                         throw new IllegalArgumentException(attr);

  1748                     }

  1749                 }

  1750                 if (type.equals(htmlType)) {

  1751                     html4j = true;

  1752                     if ("body".equals(attr)) {

  1753                         body = value;

  1754                     } else if ("args".equals(attr)) {

  1755                         args[cnt++] = value;

  1756                     } else if ("javacall".equals(attr)) {

  1757                         javacall = "1".equals(value);

  1758                     } else if ("wait4js".equals(attr)) {

  1759                         // ignore, we always invoke synchronously

  1760                     } else {

  1761                         throw new IllegalArgumentException(attr);

  1762                     }

  1763                 }

  1764             }

  1765         }

  1766         P p = new P();

  1767         p.parse(arr, jc);

  1768         if (p.body == null) {

  1769             return null;

  1770         }

  1771         StringBuilder cnt = new StringBuilder();

  1772         final String mn = findMethodName(m, cnt);

  1773         append(destObject).append(".").append(mn);

  1774         append(" = function(");

  1775         String space = "";

  1776         int index = 0;

  1777         StringBuilder toValue = new StringBuilder();

  1778         for (int i = 0; i < cnt.length(); i++) {

  1779             append(space);

  1780             space = outputArg(this, p.args, index);

  1781             if (p.html4j && space.length() > 0) {

  1782                 toValue.append("\n  ").append(p.args[index]).append(" = ")

  1783                     .append(accessClass("java_lang_Class")).append("(false).toJS(").

  1784                     append(p.args[index]).append(");");

  1785             }

  1786             index++;

  1787         }

  1788         append(") {").append("\n");

  1789         append(toValue.toString());

  1790         if (p.javacall) {

  1791             int lastSlash = jc.getClassName().lastIndexOf('/');

  1792             final String pkg = jc.getClassName().substring(0, lastSlash);

  1793             append(mangleCallbacks(pkg, p.body));

  1794             requireReference(pkg + "/$JsCallbacks$");

  1795         } else {

  1796             append(p.body);

  1797         }

  1798         append("\n}\n");

  1799         return mn;

  1800     }

  1802     private static CharSequence mangleCallbacks(String pkgName, String body) {

  1803         StringBuilder sb = new StringBuilder();

  1804         int pos = 0;

  1805         for (;;) {

  1806             int next = body.indexOf(".@", pos);

  1807             if (next == -1) {

  1808                 sb.append(body.substring(pos));

  1809                 body = sb.toString();

  1810                 break;

  1811             }

  1812             int ident = next;

  1813             while (ident > 0) {

  1814                 if (!Character.isJavaIdentifierPart(body.charAt(--ident))) {

  1815                     ident++;

  1816                     break;

  1817                 }

  1818             }

  1819             String refId = body.substring(ident, next);

  1821             sb.append(body.substring(pos, ident));

  1823             int sigBeg = body.indexOf('(', next);

  1824             int sigEnd = body.indexOf(')', sigBeg);

  1825             int colon4 = body.indexOf("::", next);

  1826             if (sigBeg == -1 || sigEnd == -1 || colon4 == -1) {

  1827                 throw new IllegalStateException("Malformed body " + body);

  1828             }

  1829             String fqn = body.substring(next + 2, colon4);

  1830             String method = body.substring(colon4 + 2, sigBeg);

  1831             String params = body.substring(sigBeg, sigEnd + 1);

  1833             int paramBeg = body.indexOf('(', sigEnd + 1);

  1835             sb.append("vm.").append(pkgName.replace('/', '_')).append("_$JsCallbacks$(false)._VM().");

  1836             sb.append(mangleJsCallbacks(fqn, method, params, false));

  1837             sb.append("(").append(refId);

  1838             if (body.charAt(paramBeg + 1) != ')') {

  1839                 sb.append(",");

  1840             }

  1841             pos = paramBeg + 1;

  1842         }

  1843         sb = null;

  1844         pos = 0;

  1845         for (;;) {

  1846             int next = body.indexOf("@", pos);

  1847             if (next == -1) {

  1848                 if (sb == null) {

  1849                     return body;

  1850                 }

  1851                 sb.append(body.substring(pos));

  1852                 return sb;

  1853             }

  1854             if (sb == null) {

  1855                 sb = new StringBuilder();

  1856             }

  1858             sb.append(body.substring(pos, next));

  1860             int sigBeg = body.indexOf('(', next);

  1861             int sigEnd = body.indexOf(')', sigBeg);

  1862             int colon4 = body.indexOf("::", next);

  1863             if (sigBeg == -1 || sigEnd == -1 || colon4 == -1) {

  1864                 throw new IllegalStateException("Malformed body " + body);

  1865             }

  1866             String fqn = body.substring(next + 1, colon4);

  1867             String method = body.substring(colon4 + 2, sigBeg);

  1868             String params = body.substring(sigBeg, sigEnd + 1);

  1870             int paramBeg = body.indexOf('(', sigEnd + 1);

  1872             sb.append("vm.").append(pkgName.replace('/', '_')).append("_$JsCallbacks$(false)._VM().");

  1873             sb.append(mangleJsCallbacks(fqn, method, params, true));

  1874             sb.append("(");

  1875             pos = paramBeg + 1;

  1876         }

  1877     }

  1879     static String mangleJsCallbacks(String fqn, String method, String params, boolean isStatic) {

  1880         if (params.startsWith("(")) {

  1881             params = params.substring(1);

  1882         }

  1883         if (params.endsWith(")")) {

  1884             params = params.substring(0, params.length() - 1);

  1885         }

  1886         StringBuilder sb = new StringBuilder();

  1887         final String fqnu = fqn.replace('.', '_');

  1888         final String rfqn = mangleClassName(fqnu);

  1889         final String rm = mangleMethodName(method);

  1890         final String srp;

  1891         {

  1892             StringBuilder pb = new StringBuilder();

  1893             int len = params.length();

  1894             int indx = 0;

  1895             while (indx < len) {

  1896                 char ch = params.charAt(indx);

  1897                 if (ch == '[' || ch == 'L') {

  1898                     pb.append("Ljava/lang/Object;");

  1899                     indx = params.indexOf(';', indx) + 1;

  1900                 } else {

  1901                     pb.append(ch);

  1902                     indx++;

  1903                 }

  1904             }

  1905             srp = mangleSig(pb.toString());

  1906         }

  1907         final String rp = mangleSig(params);

  1908         final String mrp = mangleMethodName(rp);

  1909         sb.append(rfqn).append("$").append(rm).

  1910             append('$').append(mrp).append("__Ljava_lang_Object_2");

  1911         if (!isStatic) {

  1912             sb.append('L').append(fqnu).append("_2");

  1913         }

  1914         sb.append(srp);

  1915         return sb.toString();

  1916     }

  1918     private static String className(ClassData jc) {

  1919         //return jc.getName().getInternalName().replace('/', '_');

  1920         return mangleClassName(jc.getClassName());

  1921     }

  1923     private static String[] findAnnotation(

  1924         byte[] arr, ClassData cd, final String className,

  1925         final String... attrNames

  1926     ) throws IOException {

  1927         if (arr == null) {

  1928             return null;

  1929         }

  1930         final String[] values = new String[attrNames.length];

  1931         final boolean[] found = { false };

  1932         final String jvmType = "L" + className.replace('.', '/') + ";";

  1933         AnnotationParser ap = new AnnotationParser(false, true) {

  1934             @Override

  1935             protected void visitAttr(String type, String attr, String at, String value) {

  1936                 if (type.equals(jvmType)) {

  1937                     found[0] = true;

  1938                     for (int i = 0; i < attrNames.length; i++) {

  1939                         if (attrNames[i].equals(attr)) {

  1940                             values[i] = value;

  1941                         }

  1942                     }

  1943                 }

  1944             }

  1946         };

  1947         ap.parse(arr, cd);

  1948         return found[0] ? values : null;

  1949     }

  1951     private CharSequence initField(FieldData v) {

  1952         final String is = v.getInternalSig();

  1953         if (is.length() == 1) {

  1954             switch (is.charAt(0)) {

  1955                 case 'S':

  1956                 case 'J':

  1957                 case 'B':

  1958                 case 'Z':

  1959                 case 'C':

  1960                 case 'I': return " = 0;";

  1961                 case 'F':

  1962                 case 'D': return " = 0.0;";

  1963                 default:

  1964                     throw new IllegalStateException(is);

  1965             }

  1966         }

  1967         return " = null;";

  1968     }

  1970     private void generateAnno(ClassData cd, byte[] data) throws IOException {

  1971         AnnotationParser ap = new AnnotationParser(true, false) {

  1972             int[] cnt = new int[32];

  1973             int depth;

  1975             @Override

  1976             protected void visitAnnotationStart(String attrType, boolean top) throws IOException {

  1977                 final String slashType = attrType.substring(1, attrType.length() - 1);

  1978                 requireReference(slashType);

  1980                 if (cnt[depth]++ > 0) {

  1981                     append(",");

  1982                 }

  1983                 if (top) {

  1984                     append('"').append(attrType).append("\" : ");

  1985                 }

  1986                 append("{\n");

  1987                 cnt[++depth] = 0;

  1988             }

  1990             @Override

  1991             protected void visitAnnotationEnd(String type, boolean top) throws IOException {

  1992                 append("\n}\n");

  1993                 depth--;

  1994             }

  1996             @Override

  1997             protected void visitValueStart(String attrName, char type) throws IOException {

  1998                 if (cnt[depth]++ > 0) {

  1999                     append(",\n");

  2000                 }

  2001                 cnt[++depth] = 0;

  2002                 if (attrName != null) {

  2003                     append('"').append(attrName).append("\" : ");

  2004                 }

  2005                 if (type == '[') {

  2006                     append("[");

  2007                 }

  2008             }

  2010             @Override

  2011             protected void visitValueEnd(String attrName, char type) throws IOException {

  2012                 if (type == '[') {

  2013                     append("]");

  2014                 }

  2015                 depth--;

  2016             }

  2018             @Override

  2019             protected void visitAttr(String type, String attr, String attrType, String value)

  2020             throws IOException {

  2021                 if (attr == null && value == null) {

  2022                     return;

  2023                 }

  2024                 append(value);

  2025             }

  2027             @Override

  2028             protected void visitEnumAttr(String type, String attr, String attrType, String value)

  2029             throws IOException {

  2030                 final String slashType = attrType.substring(1, attrType.length() - 1);

  2031                 requireReference(slashType);

  2033                 final String cn = mangleClassName(slashType);

  2034                 append(accessClass(cn))

  2035                    .append("(false)['valueOf__L").

  2036                     append(cn).

  2037                     append("_2Ljava_lang_String_2']('").

  2038                     append(value).

  2039                     append("')");

  2040             }

  2041         };

  2042         ap.parse(data, cd);

  2043     }

  2045     private static String outputArg(Appendable out, String[] args, int indx) throws IOException {

  2046         final String name = args[indx];

  2047         if (name == null) {

  2048             return "";

  2049         }

  2050         if (name.contains(",")) {

  2051             throw new IOException("Wrong parameter with ',': " + name);

  2052         }

  2053         out.append(name);

  2054         return ",";

  2055     }

  2057     final void emitNoFlush(

  2058         StackMapper sm,

  2059         final String format, final CharSequence... params

  2060     ) throws IOException {

  2061         emitImpl(this, format, params);

  2062     }

  2063     static final void emit(

  2064         StackMapper sm,

  2065         final Appendable out,

  2066         final String format, final CharSequence... params

  2067     ) throws IOException {

  2068         sm.flush(out);

  2069         emitImpl(out, format, params);

  2070     }

  2071     static void emitImpl(final Appendable out,

  2072                              final String format,

  2073                              final CharSequence... params) throws IOException {

  2074         final int length = format.length();

  2076         int processed = 0;

  2077         int paramOffset = format.indexOf('@');

  2078         while ((paramOffset != -1) && (paramOffset < (length - 1))) {

  2079             final char paramChar = format.charAt(paramOffset + 1);

  2080             if ((paramChar >= '1') && (paramChar <= '9')) {

  2081                 final int paramIndex = paramChar - '0' - 1;

  2083                 out.append(format, processed, paramOffset);

  2084                 out.append(params[paramIndex]);

  2086                 ++paramOffset;

  2087                 processed = paramOffset + 1;

  2088             }

  2090             paramOffset = format.indexOf('@', paramOffset + 1);

  2091         }

  2093         out.append(format, processed, length);

  2094     }

  2096     private void generateCatch(TrapData[] traps, int current, int topMostLabel) throws IOException {

  2097         append("} catch (e) {\n");

  2098         int finallyPC = -1;

  2099         for (TrapData e : traps) {

  2100             if (e == null) {

  2101                 break;

  2102             }

  2103             if (e.catch_cpx != 0) { //not finally

  2104                 final String classInternalName = jc.getClassName(e.catch_cpx);

  2105                 addReference(classInternalName);

  2106                 append("e = vm.java_lang_Class(false).bck2BrwsrThrwrbl(e);");

  2107                 append("if (e['$instOf_" + classInternalName.replace('/', '_') + "']) {");

  2108                 append("var stA0 = e;");

  2109                 goTo(this, current, e.handler_pc, topMostLabel);

  2110                 append("}\n");

  2111             } else {

  2112                 finallyPC = e.handler_pc;

  2113             }

  2114         }

  2115         if (finallyPC == -1) {

  2116             append("throw e;");

  2117         } else {

  2118             append("var stA0 = e;");

  2119             goTo(this, current, finallyPC, topMostLabel);

  2120         }

  2121         append("\n}");

  2122     }

  2124     private static void goTo(Appendable out, int current, int to, int canBack) throws IOException {

  2125         if (to < current) {

  2126             if (canBack < to) {

  2127                 out.append("{ gt = 0; continue X_" + to + "; }");

  2128             } else {

  2129                 out.append("{ gt = " + to + "; continue X_0; }");

  2130             }

  2131         } else {

  2132             out.append("{ gt = " + to + "; break IF; }");

  2133         }

  2134     }

  2136     private static void emitIf(

  2137         StackMapper sm,

  2138         Appendable out, String pattern,

  2139         CharSequence param,

  2140         int current, int to, int canBack

  2141     ) throws IOException {

  2142         sm.flush(out);

  2143         emitImpl(out, pattern, param);

  2144         goTo(out, current, to, canBack);

  2145     }

  2147     private void generateNewArray(int atype, final StackMapper smapper) throws IOException, IllegalStateException {

  2148         String jvmType;

  2149         switch (atype) {

  2150             case 4: jvmType = "[Z"; break;

  2151             case 5: jvmType = "[C"; break;

  2152             case 6: jvmType = "[F"; break;

  2153             case 7: jvmType = "[D"; break;

  2154             case 8: jvmType = "[B"; break;

  2155             case 9: jvmType = "[S"; break;

  2156             case 10: jvmType = "[I"; break;

  2157             case 11: jvmType = "[J"; break;

  2158             default: throw new IllegalStateException("Array type: " + atype);

  2159         }

  2160         emit(smapper, this,

  2161             "var @2 = Array.prototype['newArray__Ljava_lang_Object_2ZLjava_lang_String_2Ljava_lang_Object_2I'](true, '@3', null, @1);",

  2162              smapper.popI(), smapper.pushA(), jvmType);

  2163     }

  2165     private void generateANewArray(int type, final StackMapper smapper) throws IOException {

  2166         String typeName = jc.getClassName(type);

  2167         String ref = "null";

  2168         if (typeName.startsWith("[")) {

  2169             typeName = "'[" + typeName + "'";

  2170         } else {

  2171             ref = "vm." + mangleClassName(typeName);

  2172             typeName = "'[L" + typeName + ";'";

  2173         }

  2174         emit(smapper, this,

  2175             "var @2 = Array.prototype['newArray__Ljava_lang_Object_2ZLjava_lang_String_2Ljava_lang_Object_2I'](false, @3, @4, @1);",

  2176              smapper.popI(), smapper.pushA(), typeName, ref);

  2177     }

  2179     private int generateMultiANewArray(int type, final byte[] byteCodes, int i, final StackMapper smapper) throws IOException {

  2180         String typeName = jc.getClassName(type);

  2181         int dim = readUByte(byteCodes, ++i);

  2182         StringBuilder dims = new StringBuilder();

  2183         dims.append('[');

  2184         for (int d = 0; d < dim; d++) {

  2185             if (d != 0) {

  2186                 dims.insert(1, ",");

  2187             }

  2188             dims.insert(1, smapper.popI());

  2189         }

  2190         dims.append(']');

  2191         String fn = "null";

  2192         if (typeName.charAt(dim) == 'L') {

  2193             fn = "vm." + mangleClassName(typeName.substring(dim + 1, typeName.length() - 1));

  2194         }

  2195         emit(smapper, this,

  2196             "var @2 = Array.prototype['multiNewArray__Ljava_lang_Object_2Ljava_lang_String_2_3ILjava_lang_Object_2']('@3', @1, @4);",

  2197              dims.toString(), smapper.pushA(), typeName, fn

  2198         );

  2199         return i;

  2200     }

  2202     private int generateTableSwitch(int i, final byte[] byteCodes, final StackMapper smapper, int topMostLabel) throws IOException {

  2203         int table = i / 4 * 4 + 4;

  2204         int dflt = i + readInt4(byteCodes, table);

  2205         table += 4;

  2206         int low = readInt4(byteCodes, table);

  2207         table += 4;

  2208         int high = readInt4(byteCodes, table);

  2209         table += 4;

  2210         final CharSequence swVar = smapper.popValue();

  2211         smapper.flush(this);

  2212         append("switch (").append(swVar).append(") {\n");

  2213         while (low <= high) {

  2214             int offset = i + readInt4(byteCodes, table);

  2215             table += 4;

  2216             append("  case " + low).append(":"); goTo(this, i, offset, topMostLabel); append('\n');

  2217             low++;

  2218         }

  2219         append("  default: ");

  2220         goTo(this, i, dflt, topMostLabel);

  2221         append("\n}");

  2222         i = table - 1;

  2223         return i;

  2224     }

  2226     private int generateLookupSwitch(int i, final byte[] byteCodes, final StackMapper smapper, int topMostLabel) throws IOException {

  2227         int table = i / 4 * 4 + 4;

  2228         int dflt = i + readInt4(byteCodes, table);

  2229         table += 4;

  2230         int n = readInt4(byteCodes, table);

  2231         table += 4;

  2232         final CharSequence swVar = smapper.popValue();

  2233         smapper.flush(this);

  2234         append("switch (").append(swVar).append(") {\n");

  2235         while (n-- > 0) {

  2236             int cnstnt = readInt4(byteCodes, table);

  2237             table += 4;

  2238             int offset = i + readInt4(byteCodes, table);

  2239             table += 4;

  2240             append("  case " + cnstnt).append(": "); goTo(this, i, offset, topMostLabel); append('\n');

  2241         }

  2242         append("  default: ");

  2243         goTo(this, i, dflt, topMostLabel);

  2244         append("\n}");

  2245         i = table - 1;

  2246         return i;

  2247     }

  2249     private void generateInstanceOf(int indx, final StackMapper smapper) throws IOException {

  2250         String type = jc.getClassName(indx);

  2251         if (!type.startsWith("[")) {

  2252             emit(smapper, this,

  2253                     "var @2 = @1 != null && @1['$instOf_@3'] ? 1 : 0;",

  2254                  smapper.popA(), smapper.pushI(),

  2255                  type.replace('/', '_'));

  2256         } else {

  2257             int cnt = 0;

  2258             while (type.charAt(cnt) == '[') {

  2259                 cnt++;

  2260             }

  2261             if (type.charAt(cnt) == 'L') {

  2262                 type = "vm." + mangleClassName(type.substring(cnt + 1, type.length() - 1));

  2263                 emit(smapper, this,

  2264                     "var @2 = Array.prototype['isInstance__ZLjava_lang_Object_2ILjava_lang_Object_2'](@1, @4, @3);",

  2265                     smapper.popA(), smapper.pushI(),

  2266                     type, "" + cnt

  2267                 );

  2268             } else {

  2269                 emit(smapper, this,

  2270                     "var @2 = Array.prototype['isInstance__ZLjava_lang_Object_2Ljava_lang_String_2'](@1, '@3');",

  2271                     smapper.popA(), smapper.pushI(), type

  2272                 );

  2273             }

  2274         }

  2275     }

  2277     private void generateCheckcast(int indx, final StackMapper smapper) throws IOException {

  2278         String type = jc.getClassName(indx);

  2279         if (!type.startsWith("[")) {

  2280             emitNoFlush(smapper,

  2281                  "if (@1 !== null && !@1['$instOf_@2']) throw vm.java_lang_ClassCastException(true);",

  2282                  smapper.getT(0, VarType.REFERENCE, false), type.replace('/', '_'));

  2283         } else {

  2284             int cnt = 0;

  2285             while (type.charAt(cnt) == '[') {

  2286                 cnt++;

  2287             }

  2288             if (type.charAt(cnt) == 'L') {

  2289                 type = "vm." + mangleClassName(type.substring(cnt + 1, type.length() - 1));

  2290                 emitNoFlush(smapper,

  2291                     "if (@1 !== null && !Array.prototype['isInstance__ZLjava_lang_Object_2ILjava_lang_Object_2'](@1, @3, @2)) throw vm.java_lang_ClassCastException(true);",

  2292                      smapper.getT(0, VarType.REFERENCE, false), type, "" + cnt

  2293                 );

  2294             } else {

  2295                 emitNoFlush(smapper,

  2296                     "if (@1 !== null && !Array.prototype['isInstance__ZLjava_lang_Object_2Ljava_lang_String_2'](@1, '@2')) throw vm.java_lang_ClassCastException(true);",

  2297                      smapper.getT(0, VarType.REFERENCE, false), type

  2298                 );

  2299             }

  2300         }

  2301     }

  2303     private void generateByteCodeComment(int prev, int i, final byte[] byteCodes) throws IOException {

  2304         for (int j = prev; j <= i; j++) {

  2305             append(" ");

  2306             final int cc = readUByte(byteCodes, j);

  2307             append(Integer.toString(cc));

  2308         }

  2309     }

  2310 }

author	Jaroslav Tulach <jaroslav.tulach@apidesign.org>
	Thu, 26 Jun 2014 23:54:17 +0200
branch	jdk8
changeset 1639	4b09a4b689a4
parent 1635	deef1427bbe7
child 1640	f61e9984adff
permissions	-rw-r--r--