hg/bck2brwsr: vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java@001389026dbf

     1 /**

     2  * Back 2 Browser Bytecode Translator

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

     4  *

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

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

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

     8  *

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

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

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

    12  * GNU General Public License for more details.

    13  *

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

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

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

    17  */

    18 package org.apidesign.vm4brwsr;

    20 import java.io.IOException;

    21 import java.io.InputStream;

    22 import org.apidesign.javap.AnnotationParser;

    23 import org.apidesign.javap.ClassData;

    24 import org.apidesign.javap.FieldData;

    25 import org.apidesign.javap.MethodData;

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

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

    29  *

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

    31  */

    32 public abstract class ByteCodeToJavaScript {

    33     private ClassData jc;

    34     private final Appendable out;

    36     protected ByteCodeToJavaScript(Appendable out) {

    37         this.out = out;

    38     }

    40     /* Collects additional required resources.

    41      *

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

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

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

    45      */

    46     protected abstract boolean requireReference(String internalClassName);

    48     /*

    49      * @param resourcePath name of resources to read

    50      */

    51     protected abstract void requireScript(String resourcePath);

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

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

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

    56      *

    57      * @param className suggested name of the class

    58      */

    59     protected String assignClass(String className) {

    60         return className + " = ";

    61     }

    63     /**

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

    65      *

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

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

    68      *

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

    70      */

    72     public String compile(InputStream classFile) throws IOException {

    73         this.jc = new ClassData(classFile);

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

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

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

    77             "resource", "processByteCode"

    78         );

    79         if (arr != null) {

    80             requireScript(arr[0]);

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

    82                 return null;

    83             }

    84         }

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

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

    87             "container", "prototype"

    88         );

    89         StringArray toInitilize = new StringArray();

    90         final String className = className(jc);

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

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

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

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

    95             if (v.isStatic()) {

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

    97             }

    98         }

    99         if (proto == null) {

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

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

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

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

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

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

   106         } else {

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

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

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

   110         }

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

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

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

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

   115                 "name", "value"

   116             );

   117             if (only != null) {

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

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

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

   121                 }

   122                 continue;

   123             }

   124             if (m.isStatic()) {

   125                 generateStaticMethod("\n    c.", m, toInitilize);

   126             } else {

   127                 generateInstanceMethod("\n    c.", m);

   128             }

   129         }

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

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

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

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

   134         }

   135         out.append("\n    CLS.$class = java_lang_Class(true);");

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

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

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

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

   140         if (classAnno != null) {

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

   142             generateAnno(jc, out, classAnno);

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

   144         }

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

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

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

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

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

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

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

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

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

   154                 "name", "value"

   155             );

   156             if (only != null) {

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

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

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

   160                 }

   161                 continue;

   162             }

   163             if (!v.isStatic()) {

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

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

   166             }

   167         }

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

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

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

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

   172         StringBuilder sb = new StringBuilder();

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

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

   175         }

   176         return sb.toString();

   177     }

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

   179         if (javaScriptBody(prefix, m, true)) {

   180             return;

   181         }

   182         StringBuilder argsCnt = new StringBuilder();

   183         final String mn = findMethodName(m, argsCnt);

   184         out.append(prefix).append(mn).append(" = function");

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

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

   187         }

   188         out.append('(');

   189         String space = "";

   190         for (int index = 0, i = 0; i < argsCnt.length(); i++) {

   191             out.append(space);

   192             out.append("arg").append(String.valueOf(index));

   193             space = ",";

   194             final String desc = null;// XXX findDescriptor(args.get(i).getDescriptor());

   195             if (argsCnt.charAt(i) == '1') {

   196                 index += 2;

   197             } else {

   198                 index++;

   199             }

   200         }

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

   202         final byte[] code = m.getCode();

   203         if (code != null) {

   204             int len = m.getMaxLocals();

   205             for (int index = argsCnt.length(), i = argsCnt.length(); i < len; i++) {

   206                 out.append("  var ");

   207                 out.append("arg").append(String.valueOf(i)).append(";\n");

   208             }

   209             out.append("  var s = new Array();\n");

   210             produceCode(code);

   211         } else {

   212             out.append("  throw 'no code found for ").append(m.getInternalSig()).append("';\n");

   213         }

   214         out.append("};");

   215     }

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

   218         if (javaScriptBody(prefix, m, false)) {

   219             return;

   220         }

   221         StringBuilder argsCnt = new StringBuilder();

   222         final String mn = findMethodName(m, argsCnt);

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

   224         out.append("(arg0");

   225         String space = ",";

   226         for (int index = 1, i = 0; i < argsCnt.length(); i++) {

   227             out.append(space);

   228             out.append("arg").append(String.valueOf(index));

   229             if (argsCnt.charAt(i) == '1') {

   230                 index += 2;

   231             } else {

   232                 index++;

   233             }

   234         }

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

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

   237         if (code != null) {

   238             int len = m.getMaxLocals();

   239             for (int index = argsCnt.length(), i = argsCnt.length(); i < len; i++) {

   240                 out.append("  var ");

   241                 out.append("arg").append(String.valueOf(i + 1)).append(";\n");

   242             }

   243             out.append(";\n  var s = new Array();\n");

   244             produceCode(code);

   245         } else {

   246             out.append("  throw 'no code found for ").append(m.getInternalSig()).append("';\n");

   247         }

   248         out.append("};");

   249     }

   251     private void produceCode(byte[] byteCodes) throws IOException {

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

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

   254             int prev = i;

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

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

   257             switch (c) {

   258                 case opc_aload_0:

   259                 case opc_iload_0:

   260                 case opc_lload_0:

   261                 case opc_fload_0:

   262                 case opc_dload_0:

   263                     out.append("s.push(arg0);");

   264                     break;

   265                 case opc_aload_1:

   266                 case opc_iload_1:

   267                 case opc_lload_1:

   268                 case opc_fload_1:

   269                 case opc_dload_1:

   270                     out.append("s.push(arg1);");

   271                     break;

   272                 case opc_aload_2:

   273                 case opc_iload_2:

   274                 case opc_lload_2:

   275                 case opc_fload_2:

   276                 case opc_dload_2:

   277                     out.append("s.push(arg2);");

   278                     break;

   279                 case opc_aload_3:

   280                 case opc_iload_3:

   281                 case opc_lload_3:

   282                 case opc_fload_3:

   283                 case opc_dload_3:

   284                     out.append("s.push(arg3);");

   285                     break;

   286                 case opc_iload:

   287                 case opc_lload:

   288                 case opc_fload:

   289                 case opc_dload:

   290                 case opc_aload: {

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

   292                     out.append("s.push(arg").append(indx + ");");

   293                     break;

   294                 }

   295                 case opc_istore:

   296                 case opc_lstore:

   297                 case opc_fstore:

   298                 case opc_dstore:

   299                 case opc_astore: {

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

   301                     out.append("arg" + indx).append(" = s.pop();");

   302                     break;

   303                 }

   304                 case opc_astore_0:

   305                 case opc_istore_0:

   306                 case opc_lstore_0:

   307                 case opc_fstore_0:

   308                 case opc_dstore_0:

   309                     out.append("arg0 = s.pop();");

   310                     break;

   311                 case opc_astore_1:

   312                 case opc_istore_1:

   313                 case opc_lstore_1:

   314                 case opc_fstore_1:

   315                 case opc_dstore_1:

   316                     out.append("arg1 = s.pop();");

   317                     break;

   318                 case opc_astore_2:

   319                 case opc_istore_2:

   320                 case opc_lstore_2:

   321                 case opc_fstore_2:

   322                 case opc_dstore_2:

   323                     out.append("arg2 = s.pop();");

   324                     break;

   325                 case opc_astore_3:

   326                 case opc_istore_3:

   327                 case opc_lstore_3:

   328                 case opc_fstore_3:

   329                 case opc_dstore_3:

   330                     out.append("arg3 = s.pop();");

   331                     break;

   332                 case opc_iadd:

   333                 case opc_ladd:

   334                 case opc_fadd:

   335                 case opc_dadd:

   336                     out.append("s.push(s.pop() + s.pop());");

   337                     break;

   338                 case opc_isub:

   339                 case opc_lsub:

   340                 case opc_fsub:

   341                 case opc_dsub:

   342                     out.append("{ var tmp = s.pop(); s.push(s.pop() - tmp); }");

   343                     break;

   344                 case opc_imul:

   345                 case opc_lmul:

   346                 case opc_fmul:

   347                 case opc_dmul:

   348                     out.append("s.push(s.pop() * s.pop());");

   349                     break;

   350                 case opc_idiv:

   351                 case opc_ldiv:

   352                     out.append("{ var tmp = s.pop(); s.push(Math.floor(s.pop() / tmp)); }");

   353                     break;

   354                 case opc_fdiv:

   355                 case opc_ddiv:

   356                     out.append("{ var tmp = s.pop(); s.push(s.pop() / tmp); }");

   357                     break;

   358                 case opc_irem:

   359                 case opc_lrem:

   360                 case opc_frem:

   361                 case opc_drem:

   362                     out.append("{ var d = s.pop(); s.push(s.pop() % d); }");

   363                     break;

   364                 case opc_iand:

   365                 case opc_land:

   366                     out.append("s.push(s.pop() & s.pop());");

   367                     break;

   368                 case opc_ior:

   369                 case opc_lor:

   370                     out.append("s.push(s.pop() | s.pop());");

   371                     break;

   372                 case opc_ixor:

   373                 case opc_lxor:

   374                     out.append("s.push(s.pop() ^ s.pop());");

   375                     break;

   376                 case opc_ineg:

   377                 case opc_lneg:

   378                 case opc_fneg:

   379                 case opc_dneg:

   380                     out.append("s.push(- s.pop());");

   381                     break;

   382                 case opc_ishl:

   383                 case opc_lshl:

   384                     out.append("{ var v = s.pop(); s.push(s.pop() << v); }");

   385                     break;

   386                 case opc_ishr:

   387                 case opc_lshr:

   388                     out.append("{ var v = s.pop(); s.push(s.pop() >> v); }");

   389                     break;

   390                 case opc_iushr:

   391                 case opc_lushr:

   392                     out.append("{ var v = s.pop(); s.push(s.pop() >>> v); }");

   393                     break;

   394                 case opc_iinc: {

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

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

   397                     if (incrBy == 1) {

   398                         out.append("arg" + varIndx).append("++;");

   399                     } else {

   400                         out.append("arg" + varIndx).append(" += " + incrBy).append(";");

   401                     }

   402                     break;

   403                 }

   404                 case opc_return:

   405                     out.append("return;");

   406                     break;

   407                 case opc_ireturn:

   408                 case opc_lreturn:

   409                 case opc_freturn:

   410                 case opc_dreturn:

   411                 case opc_areturn:

   412                     out.append("return s.pop();");

   413                     break;

   414                 case opc_i2l:

   415                 case opc_i2f:

   416                 case opc_i2d:

   417                 case opc_l2i:

   418                     // max int check?

   419                 case opc_l2f:

   420                 case opc_l2d:

   421                 case opc_f2d:

   422                 case opc_d2f:

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

   424                     break;

   425                 case opc_f2i:

   426                 case opc_f2l:

   427                 case opc_d2i:

   428                 case opc_d2l:

   429                     out.append("s.push(Math.floor(s.pop()));");

   430                     break;

   431                 case opc_i2b:

   432                 case opc_i2c:

   433                 case opc_i2s:

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

   435                     break;

   436                 case opc_aconst_null:

   437                     out.append("s.push(null);");

   438                     break;

   439                 case opc_iconst_m1:

   440                     out.append("s.push(-1);");

   441                     break;

   442                 case opc_iconst_0:

   443                 case opc_dconst_0:

   444                 case opc_lconst_0:

   445                 case opc_fconst_0:

   446                     out.append("s.push(0);");

   447                     break;

   448                 case opc_iconst_1:

   449                 case opc_lconst_1:

   450                 case opc_fconst_1:

   451                 case opc_dconst_1:

   452                     out.append("s.push(1);");

   453                     break;

   454                 case opc_iconst_2:

   455                 case opc_fconst_2:

   456                     out.append("s.push(2);");

   457                     break;

   458                 case opc_iconst_3:

   459                     out.append("s.push(3);");

   460                     break;

   461                 case opc_iconst_4:

   462                     out.append("s.push(4);");

   463                     break;

   464                 case opc_iconst_5:

   465                     out.append("s.push(5);");

   466                     break;

   467                 case opc_ldc: {

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

   469                     String v = encodeConstant(indx);

   470                     out.append("s.push(").append(v).append(");");

   471                     break;

   472                 }

   473                 case opc_ldc_w:

   474                 case opc_ldc2_w: {

   475                     int indx = readIntArg(byteCodes, i);

   476                     i += 2;

   477                     String v = encodeConstant(indx);

   478                     out.append("s.push(").append(v).append(");");

   479                     break;

   480                 }

   481                 case opc_lcmp:

   482                 case opc_fcmpl:

   483                 case opc_fcmpg:

   484                 case opc_dcmpl:

   485                 case opc_dcmpg: {

   486                     out.append("{ var delta = s.pop() - s.pop(); s.push(delta < 0 ?-1 : (delta == 0 ? 0 : 1)); }");

   487                     break;

   488                 }

   489                 case opc_if_acmpeq:

   490                     i = generateIf(byteCodes, i, "===");

   491                     break;

   492                 case opc_if_acmpne:

   493                     i = generateIf(byteCodes, i, "!=");

   494                     break;

   495                 case opc_if_icmpeq: {

   496                     i = generateIf(byteCodes, i, "==");

   497                     break;

   498                 }

   499                 case opc_ifeq: {

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

   501                     out.append("if (s.pop() == 0) { gt = " + indx);

   502                     out.append("; continue; }");

   503                     i += 2;

   504                     break;

   505                 }

   506                 case opc_ifne: {

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

   508                     out.append("if (s.pop() != 0) { gt = " + indx);

   509                     out.append("; continue; }");

   510                     i += 2;

   511                     break;

   512                 }

   513                 case opc_iflt: {

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

   515                     out.append("if (s.pop() < 0) { gt = " + indx);

   516                     out.append("; continue; }");

   517                     i += 2;

   518                     break;

   519                 }

   520                 case opc_ifle: {

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

   522                     out.append("if (s.pop() <= 0) { gt = " + indx);

   523                     out.append("; continue; }");

   524                     i += 2;

   525                     break;

   526                 }

   527                 case opc_ifgt: {

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

   529                     out.append("if (s.pop() > 0) { gt = " + indx);

   530                     out.append("; continue; }");

   531                     i += 2;

   532                     break;

   533                 }

   534                 case opc_ifge: {

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

   536                     out.append("if (s.pop() >= 0) { gt = " + indx);

   537                     out.append("; continue; }");

   538                     i += 2;

   539                     break;

   540                 }

   541                 case opc_ifnonnull: {

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

   543                     out.append("if (s.pop() !== null) { gt = " + indx);

   544                     out.append("; continue; }");

   545                     i += 2;

   546                     break;

   547                 }

   548                 case opc_ifnull: {

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

   550                     out.append("if (s.pop() === null) { gt = " + indx);

   551                     out.append("; continue; }");

   552                     i += 2;

   553                     break;

   554                 }

   555                 case opc_if_icmpne:

   556                     i = generateIf(byteCodes, i, "!=");

   557                     break;

   558                 case opc_if_icmplt:

   559                     i = generateIf(byteCodes, i, ">");

   560                     break;

   561                 case opc_if_icmple:

   562                     i = generateIf(byteCodes, i, ">=");

   563                     break;

   564                 case opc_if_icmpgt:

   565                     i = generateIf(byteCodes, i, "<");

   566                     break;

   567                 case opc_if_icmpge:

   568                     i = generateIf(byteCodes, i, "<=");

   569                     break;

   570                 case opc_goto: {

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

   572                     out.append("gt = " + indx).append("; continue;");

   573                     i += 2;

   574                     break;

   575                 }

   576                 case opc_lookupswitch: {

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

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

   579                     table += 4;

   580                     int n = readInt4(byteCodes, table);

   581                     table += 4;

   582                     out.append("switch (s.pop()) {\n");

   583                     while (n-- > 0) {

   584                         int cnstnt = readInt4(byteCodes, table);

   585                         table += 4;

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

   587                         table += 4;

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

   589                     }

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

   591                     i = table - 1;

   592                     break;

   593                 }

   594                 case opc_tableswitch: {

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

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

   597                     table += 4;

   598                     int low = readInt4(byteCodes, table);

   599                     table += 4;

   600                     int high = readInt4(byteCodes, table);

   601                     table += 4;

   602                     out.append("switch (s.pop()) {\n");

   603                     while (low <= high) {

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

   605                         table += 4;

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

   607                         low++;

   608                     }

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

   610                     i = table - 1;

   611                     break;

   612                 }

   613                 case opc_invokeinterface: {

   614                     i = invokeVirtualMethod(byteCodes, i) + 2;

   615                     break;

   616                 }

   617                 case opc_invokevirtual:

   618                     i = invokeVirtualMethod(byteCodes, i);

   619                     break;

   620                 case opc_invokespecial:

   621                     i = invokeStaticMethod(byteCodes, i, false);

   622                     break;

   623                 case opc_invokestatic:

   624                     i = invokeStaticMethod(byteCodes, i, true);

   625                     break;

   626                 case opc_new: {

   627                     int indx = readIntArg(byteCodes, i);

   628                     String ci = jc.getClassName(indx);

   629                     out.append("s.push(new ");

   630                     out.append(ci.replace('/','_'));

   631                     out.append("());");

   632                     addReference(ci);

   633                     i += 2;

   634                     break;

   635                 }

   636                 case opc_newarray: {

   637                     int type = byteCodes[i++];

   638                     out.append("s.push(new Array(s.pop()).fillNulls());");

   639                     break;

   640                 }

   641                 case opc_anewarray: {

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

   643                     out.append("s.push(new Array(s.pop()).fillNulls());");

   644                     break;

   645                 }

   646                 case opc_multianewarray: {

   647                     i += 2;

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

   649                     out.append("{ var a0 = new Array(s.pop()).fillNulls();");

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

   651                         out.append("\n  var l" + d).append(" = s.pop();");

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

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

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

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

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

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

   658                             append(";");

   659                     }

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

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

   662                     }

   663                     out.append("\ns.push(a0); }");

   664                     break;

   665                 }

   666                 case opc_arraylength:

   667                     out.append("s.push(s.pop().length);");

   668                     break;

   669                 case opc_iastore:

   670                 case opc_lastore:

   671                 case opc_fastore:

   672                 case opc_dastore:

   673                 case opc_aastore:

   674                 case opc_bastore:

   675                 case opc_castore:

   676                 case opc_sastore: {

   677                     out.append("{ var value = s.pop(); var indx = s.pop(); s.pop()[indx] = value; }");

   678                     break;

   679                 }

   680                 case opc_iaload:

   681                 case opc_laload:

   682                 case opc_faload:

   683                 case opc_daload:

   684                 case opc_aaload:

   685                 case opc_baload:

   686                 case opc_caload:

   687                 case opc_saload: {

   688                     out.append("{ var indx = s.pop(); s.push(s.pop()[indx]); }");

   689                     break;

   690                 }

   691                 case opc_pop2:

   692                     out.append("s.pop();");

   693                 case opc_pop:

   694                     out.append("s.pop();");

   695                     break;

   696                 case opc_dup:

   697                     out.append("s.push(s[s.length - 1]);");

   698                     break;

   699                 case opc_dup_x1:

   700                     out.append("{ var v1 = s.pop(); var v2 = s.pop(); s.push(v1); s.push(v2); s.push(v1); }");

   701                     break;

   702                 case opc_dup_x2:

   703                     out.append("{ var v1 = s.pop(); var v2 = s.pop(); var v3 = s.pop(); s.push(v1); s.push(v3); s.push(v2); s.push(v1); }");

   704                     break;

   705                 case opc_bipush:

   706                     out.append("s.push(" + byteCodes[++i] + ");");

   707                     break;

   708                 case opc_sipush:

   709                     out.append("s.push(" + readIntArg(byteCodes, i) + ");");

   710                     i += 2;

   711                     break;

   712                 case opc_getfield: {

   713                     int indx = readIntArg(byteCodes, i);

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

   715                     out.append("s.push(s.pop().fld_").

   716                         append(fi[1]).append(");");

   717                     i += 2;

   718                     break;

   719                 }

   720                 case opc_getstatic: {

   721                     int indx = readIntArg(byteCodes, i);

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

   723                     out.append("s.push(").append(fi[0].replace('/', '_'));

   724                     out.append('.').append(fi[1]).append(");");

   725                     i += 2;

   726                     addReference(fi[0]);

   727                     break;

   728                 }

   729                 case opc_putstatic: {

   730                     int indx = readIntArg(byteCodes, i);

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

   732                     out.append(fi[0].replace('/', '_'));

   733                     out.append('.').append(fi[1]).append(" = s.pop();");

   734                     i += 2;

   735                     addReference(fi[0]);

   736                     break;

   737                 }

   738                 case opc_putfield: {

   739                     int indx = readIntArg(byteCodes, i);

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

   741                     out.append("{ var v = s.pop(); s.pop().fld_")

   742                        .append(fi[1]).append(" = v; }");

   743                     i += 2;

   744                     break;

   745                 }

   746                 case opc_checkcast: {

   747                     int indx = readIntArg(byteCodes, i);

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

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

   750                         // no way to check arrays right now

   751                         out.append("if(s[s.length - 1].$instOf_")

   752                            .append(type.replace('/', '_'))

   753                            .append(" != 1) throw {};"); // XXX proper exception

   754                     }

   755                     i += 2;

   756                     break;

   757                 }

   758                 case opc_instanceof: {

   759                     int indx = readIntArg(byteCodes, i);

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

   761                     out.append("s.push(s.pop().$instOf_")

   762                        .append(type.replace('/', '_'))

   763                        .append(" ? 1 : 0);");

   764                     i += 2;

   765                     break;

   766                 }

   767                 case opc_athrow: {

   768                     out.append("{ var t = s.pop(); s = new Array(1); s[0] = t; throw t; }");

   769                     break;

   770                 }

   771                 default: {

   772                     out.append("throw 'unknown bytecode " + c + "';");

   773                 }

   775             }

   776             out.append(" //");

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

   778                 out.append(" ");

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

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

   781             }

   782             out.append("\n");

   783         }

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

   785     }

   787     private int generateIf(byte[] byteCodes, int i, final String test) throws IOException {

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

   789         out.append("if (s.pop() ").append(test).append(" s.pop()) { gt = " + indx);

   790         out.append("; continue; }");

   791         return i + 2;

   792     }

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

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

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

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

   798     }

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

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

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

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

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

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

   805     }

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

   807         return (byteCodes[offsetInstruction] + 256) % 256;

   808     }

   810     private static void countArgs(String descriptor, boolean[] hasReturnType, StringBuilder sig, StringBuilder cnt) {

   811         int i = 0;

   812         Boolean count = null;

   813         boolean array = false;

   814         sig.append("__");

   815         int firstPos = sig.length();

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

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

   818             switch (ch) {

   819                 case '(':

   820                     count = true;

   821                     continue;

   822                 case ')':

   823                     count = false;

   824                     continue;

   825                 case 'B':

   826                 case 'C':

   827                 case 'D':

   828                 case 'F':

   829                 case 'I':

   830                 case 'J':

   831                 case 'S':

   832                 case 'Z':

   833                     if (count) {

   834                         if (array) {

   835                             sig.append("_3");

   836                         }

   837                         sig.append(ch);

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

   839                             cnt.append('1');

   840                         } else {

   841                             cnt.append('0');

   842                         }

   843                     } else {

   844                         hasReturnType[0] = true;

   845                         sig.insert(firstPos, ch);

   846                         if (array) {

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

   848                         }

   849                     }

   850                     array = false;

   851                     continue;

   852                 case 'V':

   853                     assert !count;

   854                     hasReturnType[0] = false;

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

   856                     continue;

   857                 case 'L':

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

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

   860                     if (count) {

   861                         if (array) {

   862                             sig.append("_3");

   863                         }

   864                         sig.append(realSig);

   865                         cnt.append('0');

   866                     } else {

   867                         sig.insert(firstPos, realSig);

   868                         if (array) {

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

   870                         }

   871                         hasReturnType[0] = true;

   872                     }

   873                     i = next + 1;

   874                     continue;

   875                 case '[':

   876                     array = true;

   877                     continue;

   878                 default:

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

   880             }

   881         }

   882     }

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

   885         StringBuilder sb = new StringBuilder();

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

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

   888             switch (ch) {

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

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

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

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

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

   894             }

   895         }

   896         return sb.toString();

   897     }

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

   900         StringBuilder name = new StringBuilder();

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

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

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

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

   905         } else {

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

   907         }

   909         boolean hasReturn[] = { false };

   910         countArgs(m.getInternalSig(), hasReturn, name, cnt);

   911         return name.toString();

   912     }

   914     static String findMethodName(String[] mi, StringBuilder cnt, boolean[] hasReturn) {

   915         StringBuilder name = new StringBuilder();

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

   917         String nm= mi[1];

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

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

   920         } else {

   921             name.append(nm);

   922         }

   923         countArgs(descr, hasReturn, name, cnt);

   924         return name.toString();

   925     }

   927     private int invokeStaticMethod(byte[] byteCodes, int i, boolean isStatic)

   928     throws IOException {

   929         int methodIndex = readIntArg(byteCodes, i);

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

   931         boolean[] hasReturn = { false };

   932         StringBuilder cnt = new StringBuilder();

   933         String mn = findMethodName(mi, cnt, hasReturn);

   934         out.append("{ ");

   935         for (int j = cnt.length() - 1; j >= 0; j--) {

   936             out.append("var v" + j).append(" = s.pop(); ");

   937         }

   939         if (hasReturn[0]) {

   940             out.append("s.push(");

   941         }

   942         final String in = mi[0];

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

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

   945         out.append(mn);

   946         out.append('(');

   947         String sep = "";

   948         if (!isStatic) {

   949             out.append("s.pop()");

   950             sep = ", ";

   951         }

   952         for (int j = 0; j < cnt.length(); j++) {

   953             out.append(sep);

   954             out.append("v" + j);

   955             sep = ", ";

   956         }

   957         out.append(")");

   958         if (hasReturn[0]) {

   959             out.append(")");

   960         }

   961         out.append("; }");

   962         i += 2;

   963         addReference(in);

   964         return i;

   965     }

   966     private int invokeVirtualMethod(byte[] byteCodes, int i)

   967     throws IOException {

   968         int methodIndex = readIntArg(byteCodes, i);

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

   970         boolean[] hasReturn = { false };

   971         StringBuilder cnt = new StringBuilder();

   972         String mn = findMethodName(mi, cnt, hasReturn);

   973         out.append("{ ");

   974         for (int j = cnt.length() - 1; j >= 0; j--) {

   975             out.append("var v" + j).append(" = s.pop(); ");

   976         }

   977         out.append("var self = s.pop(); ");

   978         if (hasReturn[0]) {

   979             out.append("s.push(");

   980         }

   981         out.append("self.");

   982         out.append(mn);

   983         out.append('(');

   984         out.append("self");

   985         for (int j = 0; j < cnt.length(); j++) {

   986             out.append(", ");

   987             out.append("v" + j);

   988         }

   989         out.append(")");

   990         if (hasReturn[0]) {

   991             out.append(")");

   992         }

   993         out.append("; }");

   994         i += 2;

   995         return i;

   996     }

   998     private void addReference(String cn) throws IOException {

   999         if (requireReference(cn)) {

  1000             out.append(" /* needs ").append(cn).append(" */");

  1001         }

  1002     }

  1004     private void outType(String d, StringBuilder out) {

  1005         int arr = 0;

  1006         while (d.charAt(0) == '[') {

  1007             out.append('A');

  1008             d = d.substring(1);

  1009         }

  1010         if (d.charAt(0) == 'L') {

  1011             assert d.charAt(d.length() - 1) == ';';

  1012             out.append(d.replace('/', '_').substring(0, d.length() - 1));

  1013         } else {

  1014             out.append(d);

  1015         }

  1016     }

  1018     private String encodeConstant(int entryIndex) throws IOException {

  1019         String[] classRef = { null };

  1020         String s = jc.stringValue(entryIndex, classRef);

  1021         if (classRef[0] != null) {

  1022             addReference(classRef[0]);

  1023         }

  1024         return s;

  1025     }

  1027     private boolean javaScriptBody(String prefix, MethodData m, boolean isStatic) throws IOException {

  1028         byte[] arr = m.findAnnotationData(true);

  1029         if (arr == null) {

  1030             return false;

  1031         }

  1032         final String jvmType = "Lorg/apidesign/bck2brwsr/core/JavaScriptBody;";

  1033         class P extends AnnotationParser {

  1034             public P() {

  1035                 super(false);

  1036             }

  1038             int cnt;

  1039             String[] args = new String[30];

  1040             String body;

  1042             @Override

  1043             protected void visitAttr(String type, String attr, String at, String value) {

  1044                 if (type.equals(jvmType)) {

  1045                     if ("body".equals(attr)) {

  1046                         body = value;

  1047                     } else if ("args".equals(attr)) {

  1048                         args[cnt++] = value;

  1049                     } else {

  1050                         throw new IllegalArgumentException(attr);

  1051                     }

  1052                 }

  1053             }

  1054         }

  1055         P p = new P();

  1056         p.parse(arr, jc);

  1057         if (p.body == null) {

  1058             return false;

  1059         }

  1060         StringBuilder cnt = new StringBuilder();

  1061         out.append(prefix).append(findMethodName(m, cnt));

  1062         out.append(" = function(");

  1063         String space;

  1064         int index;

  1065         if (!isStatic) {

  1066             out.append(p.args[0]);

  1067             space = ",";

  1068             index = 1;

  1069         } else {

  1070             space = "";

  1071             index = 0;

  1072         }

  1073         for (int i = 0; i < cnt.length(); i++) {

  1074             out.append(space);

  1075             out.append(p.args[index]);

  1076             index++;

  1077             space = ",";

  1078         }

  1079         out.append(") {").append("\n");

  1080         out.append(p.body);

  1081         out.append("\n}\n");

  1082         return true;

  1083     }

  1084     private static String className(ClassData jc) {

  1085         //return jc.getName().getInternalName().replace('/', '_');

  1086         return jc.getClassName().replace('/', '_');

  1087     }

  1089     private static String[] findAnnotation(

  1090         byte[] arr, ClassData cd, final String className,

  1091         final String... attrNames

  1092     ) throws IOException {

  1093         if (arr == null) {

  1094             return null;

  1095         }

  1096         final String[] values = new String[attrNames.length];

  1097         final boolean[] found = { false };

  1098         final String jvmType = "L" + className.replace('.', '/') + ";";

  1099         AnnotationParser ap = new AnnotationParser(false) {

  1100             @Override

  1101             protected void visitAttr(String type, String attr, String at, String value) {

  1102                 if (type.equals(jvmType)) {

  1103                     found[0] = true;

  1104                     for (int i = 0; i < attrNames.length; i++) {

  1105                         if (attrNames[i].equals(attr)) {

  1106                             values[i] = value;

  1107                         }

  1108                     }

  1109                 }

  1110             }

  1112         };

  1113         ap.parse(arr, cd);

  1114         return found[0] ? values : null;

  1115     }

  1117     private CharSequence initField(FieldData v) {

  1118         final String is = v.getInternalSig();

  1119         if (is.length() == 1) {

  1120             switch (is.charAt(0)) {

  1121                 case 'S':

  1122                 case 'J':

  1123                 case 'B':

  1124                 case 'Z':

  1125                 case 'C':

  1126                 case 'I': return " = 0;";

  1127                 case 'F':

  1128                 case 'D': return " = 0.0;";

  1129                 default:

  1130                     throw new IllegalStateException(is);

  1131             }

  1132         }

  1133         return " = null;";

  1134     }

  1136     private static void generateAnno(ClassData cd, final Appendable out, byte[] data) throws IOException {

  1137         AnnotationParser ap = new AnnotationParser(true) {

  1138             int anno;

  1139             int cnt;

  1141             @Override

  1142             protected void visitAnnotationStart(String type) throws IOException {

  1143                 if (anno++ > 0) {

  1144                     out.append(",");

  1145                 }

  1146                 out.append('"').append(type).append("\" : {\n");

  1147                 cnt = 0;

  1148             }

  1150             @Override

  1151             protected void visitAnnotationEnd(String type) throws IOException {

  1152                 out.append("\n}\n");

  1153             }

  1155             @Override

  1156             protected void visitAttr(String type, String attr, String attrType, String value)

  1157             throws IOException {

  1158                 if (cnt++ > 0) {

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

  1160                 }

  1161                 out.append(attr).append(attrType).append(" : ").append(value);

  1162             }

  1163         };

  1164         ap.parse(data, cd);

  1165     }

  1166 }

author	Jaroslav Tulach <jaroslav.tulach@apidesign.org>
	Tue, 04 Dec 2012 11:21:10 +0100
branch	reflection
changeset 249	001389026dbf
parent 237	84ffc347412d
parent 248	0bfcb6585290
child 250	42c2ceb1e160
permissions	-rw-r--r--