git.roojs.org Git - gnome.introspection-doc-generator/blob - JSDOC/ScopeParser.js

   1 //<Script type="text/javascript">
   2
   3 Scope = imports['JSDOC/Scope.js'].Scope;
   4
   5 /**
   6 * Scope stuff
   7 *
   8 * // FIXME - I need this to do next() without doccomments..
   9 */
  10
  11 ScopeParser = function(ts) {
  12     this.ts = ts; // {TokenStream}
  13     this.warnings = [];
  14     this.scopes = [];
  15     this.indexedScopes = {};
  16     this.timer = new Date() * 1;
  17     this.debug = false;
  18 }
  19
  20 // list of keywords that should not be used in object literals.
  21 ScopeParser.idents = [
  22         "break",
  23         "case",
  24         "continue",
  25         "default",
  26         "delete",
  27         "do",
  28         "else",
  29         "export",
  30         "false",
  31         "for",
  32         "function",
  33         "if",
  34         "import",
  35         "in",
  36         "new",
  37         "null",
  38         "return",
  39         "switch",
  40         "this",
  41         "true",
  42         "typeof",
  43         "var",
  44         "void",
  45         "while",
  46         "with",
  47
  48         "catch",
  49         "class",
  50         "const",
  51         "debugger",
  52         "enum",
  53         "extends",
  54         "finally",
  55         "super",
  56         "throw",
  57         "try",
  58
  59         "abstract",
  60         "boolean",
  61         "byte",
  62         "char",
  63         "double",
  64         "final",
  65         "float",
  66         "goto",
  67         "implements",
  68         "instanceof",
  69         "int",
  70         "interface",
  71         "long",
  72         "native",
  73         "package",
  74         "private",
  75         "protected",
  76         "public",
  77         "short",
  78         "static",
  79         "synchronized",
  80         "throws",
  81         "transient",
  82                 "include",
  83                 "undefined"
  84 ];
  85
  86
  87 ScopeParser.prototype = {
  88     timer: 0,
  89     timerPrint: function (str) {
  90         var ntime = new Date() * 1;
  91         var tdif =  ntime -this.timer;
  92         this.timer = ntime;
  93         var pref = '';
  94         if (tdif > 100) { //slower ones..
  95             pref = '***';
  96         }
  97         println(pref+'['+tdif+']'+str);
  98
  99     },
 100     warn: function(s) {
 101         //print('****************' + s);
 102         this.warnings.push(s);
 103         //println("WARNING:" + htmlescape(s) + "<BR>");
 104     },
 105     // defaults should not be initialized here =- otherwise they get duped on new, rather than initalized..
 106     warnings : false,
 107     ts : false,
 108     scopes : false,
 109     global : false,
 110     mode : "", //"BUILDING_SYMBOL_TREE",
 111     braceNesting : 0,
 112     indexedScopes : false,
 113     munge: true,
 114
 115
 116
 117
 118
 119     buildSymbolTree : function()
 120     {
 121         //println("<PRE>");
 122
 123         this.ts.rewind();
 124         this.braceNesting = 0;
 125         this.scopes = [];
 126
 127
 128
 129
 130         this.globalScope = new  Scope(-1, false, -1, '');
 131         indexedScopes = { 0 : this.globalScope };
 132
 133         this.mode = 'BUILDING_SYMBOL_TREE';
 134         this.parseScope(this.globalScope);
 135
 136         //print("---------------END PASS 1 ---------------- ");
 137
 138     },
 139     mungeSymboltree : function()
 140     {
 141
 142         if (!this.munge) {
 143             return;
 144         }
 145
 146         // One problem with obfuscation resides in the use of undeclared
 147         // and un-namespaced global symbols that are 3 characters or less
 148         // in length. Here is an example:
 149         //
 150         //     var declaredGlobalVar;
 151         //
 152         //     function declaredGlobalFn() {
 153         //         var localvar;
 154         //         localvar = abc; // abc is an undeclared global symbol
 155         //     }
 156         //
 157         // In the example above, there is a slim chance that localvar may be
 158         // munged to 'abc', conflicting with the undeclared global symbol
 159         // abc, creating a potential bug. The following code detects such
 160         // global symbols. This must be done AFTER the entire file has been
 161         // parsed, and BEFORE munging the symbol tree. Note that declaring
 162         // extra symbols in the global scope won't hurt.
 163         //
 164         // Note: Since we go through all the tokens to do this, we also use
 165         // the opportunity to count how many times each identifier is used.
 166
 167         this.ts.rewind();
 168         this.braceNesting = 0;
 169         this.scopes= [];
 170         this.mode = 'PASS2_SYMBOL_TREE';
 171
 172         //println("MUNGING?");
 173
 174         this.parseScope(this.globalScope);
 175         this.globalScope.munge();
 176     },
 177
 178
 179     log : function(str)
 180     {
 181         print ("                    ".substring(0, this.braceNesting*2) + str);
 182
 183         //println("<B>LOG:</B>" + htmlescape(str) + "<BR/>\n");
 184     },
 185     logR : function(str)
 186     {
 187             //println("<B>LOG:</B>" + str + "<BR/>");
 188     },
 189
 190
 191
 192
 193
 194
 195     parseScope : function(scope) // parse a token stream..
 196     {
 197         //this.timerPrint("parseScope EnterScope");
 198         //this.log(">>> ENTER SCOPE" + this.scopes.length);
 199         var symbol;
 200         var token;
 201
 202         var identifier;
 203
 204         var expressionBraceNesting = this.braceNesting;
 205
 206         var parensNesting = 0;
 207
 208         var isObjectLitAr = [ false ];
 209         var isInObjectLitAr;
 210         this.scopes.push(scope);
 211
 212         var scopeIndent = '';
 213         this.scopes.forEach(function() {
 214             scopeIndent += '   ';
 215         });
 216
 217         token = this.ts.lookTok(1);
 218         while (token) {
 219           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 220
 221             //this.log(token.data);
 222             if (token.type == 'NAME') {
 223             //    print('*' + token.data);
 224             }
 225             switch(token.type + '.' + token.name) {
 226                 case "KEYW.VAR":
 227                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 228
 229                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 230                     while (true) {
 231                         token = this.ts.nextTok();
 232                         !this.debug|| print( token.toString());
 233
 234                         if (!token) { // can return false at EOF!
 235                             break;
 236                         }
 237                         if (token.name == "VAR" || token.data == ',') { // kludge..
 238                             continue;
 239                         }
 240                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 241                         if (token.type !="NAME") {
 242                             for(var i = Math.max(this.ts.cursor-10,0); i < this.ts.cursor+1; i++) {
 243                                 print(this.ts.tokens[i].toString());
 244                             }
 245
 246                             print( "var without ident");
 247                             Seed.quit()
 248                         }
 249
 250
 251                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 252                             identifier = scope.getIdentifier(token.data) ;
 253
 254                             if (identifier == false) {
 255                                 scope.declareIdentifier(token.data, token);
 256                             } else {
 257                                 token.identifier = identifier;
 258                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 259                             }
 260                         }
 261
 262                         token = this.ts.nextTok();
 263                         !this.debug|| print(token.toString());
 264                         /*
 265                         assert token.getType() == Token.SEMI ||
 266                                 token.getType() == Token.ASSIGN ||
 267                                 token.getType() == Token.COMMA ||
 268                                 token.getType() == Token.IN;
 269                         */
 270                         if (token.name == "IN") {
 271                             break;
 272                         } else {
 273                             //var bn = this.braceNesting;
 274                             this.parseExpression();
 275                             //this.braceNesting = bn;
 276                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 277
 278                             token = this.ts.lookTok(1);
 279                             !this.debug|| print("AFTER EXP: " + token.toString());
 280                             if (token.data == ';') {
 281                                 break;
 282                             }
 283                         }
 284                     }
 285                     break;
 286                 case "KEYW.FUNCTION":
 287                     //println("<i>"+token.data+"</i>");
 288                      var bn = this.braceNesting;
 289                     this.parseFunctionDeclaration();
 290                      this.braceNesting = bn;
 291                     break;
 292
 293                 case "PUNC.LEFT_CURLY": // {
 294                     //println("<i>"+token.data+"</i>");
 295                     isObjectLitAr.push(false);
 296                     this.braceNesting++;
 297
 298                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 299                     break;
 300
 301                 case "PUNC.RIGHT_CURLY": // }
 302                     //println("<i>"+token.data+"</i>");
 303                     this.braceNesting--;
 304                     isObjectLitAr.pop();
 305                     //print(">>>>>> OBJLIT POP"+ this.braceNesting);
 306                         //assert braceNesting >= scope.getBra ceNesting();
 307
 308                     if (this.braceNesting < expressionBraceNesting) {
 309                         var ls = this.scopes.pop();
 310                         ls.getUsedSymbols();
 311                         // eat symbol if we are currently at {
 312                         if (this.ts.look(0).data == '{') {
 313                             this.ts.nextTok();
 314                         }
 315
 316                         //print("<<<<<<<EXIT SCOPE" +this.scopes.length);
 317                         return;
 318                     }
 319                     break;
 320
 321                 case "KEYW.WITH":
 322                     //println("<i>"+token.data+"</i>");
 323                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 324                         // Inside a 'with' block, it is impossible to figure out
 325                         // statically whether a symbol is a local variable or an
 326                         // object member. As a consequence, the only thing we can
 327                         // do is turn the obfuscation off for the highest scope
 328                         // containing the 'with' block.
 329                         this.protectScopeFromObfuscation(scope);
 330                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 331                     }
 332                     break;
 333
 334                 case "KEYW.CATCH":
 335                     //println("<i>"+token.data+"</i>");
 336                     this.parseCatch();
 337                     break;
 338                 /*
 339                 case Token.SPECIALCOMMENT:
 340                         if (mode == BUILDING_SYMBOL_TREE) {
 341                             protectScopeFromObfuscation(scope);
 342                             this.warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression." : ""), true);
 343                         }
 344                         break;
 345                 */
 346
 347                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 348                 case "STRN.SINGLE_QUOTE":
 349                     //println("<i>"+token.data+"</i>");
 350                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 351                         // then we are in an object lit.. -> we need to flag the brace as such...
 352                         isObjectLitAr.pop();
 353                         isObjectLitAr.push(true);
 354                         //print(">>>>>> OBJLIT REPUSH(true)");
 355                     }
 356                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 357
 358                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 359                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 360                         // see if we can replace..
 361                         // remove the quotes..
 362                         // should do a bit more checking!!!! (what about wierd char's in the string..
 363                         var str = token.data.substring(1,token.data.length-1);
 364                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 365                             token.outData = str;
 366                         }
 367
 368
 369
 370                     }
 371
 372
 373
 374                     break;
 375
 376                 case "NAME.NAME":
 377
 378                     //print("DEAL WITH NAME:");
 379                     // got identifier..
 380
 381                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 382                     if ((this.ts.lookTok(-1).data == "{") && (this.ts.lookTok(1).data == ":")) {
 383                         isObjectLitAr.pop();
 384                         isObjectLitAr.push(true);
 385                         //print(">>>>>> OBJLIT REPUSH(true)");
 386                         //println("<i>"+token.data+"</i>");
 387                         break;
 388                     }
 389                    // print("DEAL WITH obj lit:");
 390                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 391
 392                     if (isInObjectLitAr && (this.ts.lookTok(1).data == ":") && (this.ts.lookTok(-1).data == ",")) {
 393                         // skip, it's an object lit key..
 394                         //println("<i>"+token.data+"</i>");
 395                         break;
 396                     }
 397
 398
 399                     // skip anyting with "." before it..!!
 400
 401                     if (this.ts.lookTok(-1).data == ".") {
 402                         // skip, it's an object prop.
 403                         //println("<i>"+token.data+"</i>");
 404                         break;
 405                     }
 406                     symbol = token.data;
 407                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 408
 409                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 410
 411                         //print ("MUNGE?" + symbol);
 412
 413                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 414
 415                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 416                         identifier = this.getIdentifier(symbol, scope);
 417
 418                         if (identifier == false) {
 419 // BUG!find out where builtin is defined...
 420                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 421                                 // Here, we found an undeclared and un-namespaced symbol that is
 422                                 // 3 characters or less in length. Declare it in the global scope.
 423                                 // We don't need to declare longer symbols since they won't cause
 424                                 // any conflict with other munged symbols.
 425                                 this.globalScope.declareIdentifier(symbol, token);
 426                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 427                             }
 428
 429                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 430                         } else {
 431                             token.identifier = identifier;
 432                             identifier.refcount++;
 433                         }
 434                     }
 435
 436                     break;
 437                     //println("<B>SID</B>");
 438                 default:
 439                     if (token.type != 'KEYW') {
 440                         break;
 441                     }
 442                    // print("Check eval:");
 443
 444                     symbol = token.data;
 445
 446                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 447
 448                         if (symbol == "eval") {
 449                             // look back one and see if we can find a comment!!!
 450                             if (this.ts.look(-1).type == "COMM") {
 451                                 // look for eval:var:noreplace\n
 452                                 var _t = this;
 453                                 this.ts.look(-1).data.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 454
 455                                     var hi = _t.getIdentifier(a, scope);
 456                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 457                                     if (hi) {
 458                                      //   println("PROTECT "+a+" from munge");
 459                                         hi.toMunge = false;
 460                                     }
 461
 462                                 });
 463
 464
 465                             } else {
 466
 467
 468                                 this.protectScopeFromObfuscation(scope);
 469                                 this.warn("Using 'eval' is not recommended. (use  eval:var:noreplace in comments to optimize) " + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 470                             }
 471
 472                         }
 473
 474                     }
 475                     break;
 476
 477
 478             } // end switch
 479
 480
 481             //this.timerPrint("parseScope TOK : " + token.toString());
 482             token = this.ts.nextTok();
 483             //if (this.ts.nextT()) break;
 484
 485         }
 486         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 487     },
 488
 489
 490     parseExpression : function() {
 491
 492         // Parse the expression until we encounter a comma or a semi-colon
 493         // in the same brace nesting, bracket nesting and paren nesting.
 494         // Parse functions if any...
 495         //println("<i>EXP</i><BR/>");
 496         !this.debug || print("PARSE EXPR");
 497         var symbol;
 498         var token;
 499         var currentScope;
 500         var identifier;
 501
 502         var expressionBraceNesting = this.braceNesting;
 503         var bracketNesting = 0;
 504         var parensNesting = 0;
 505         var isInObjectLitAr;
 506         var isObjectLitAr = [ false ];
 507         while (token = this.ts.lookTok()) {
 508
 509
 510
 511             currentScope = this.scopes[this.scopes.length-1];
 512
 513             //println("<i>"+token.data+"</i>");
 514             //this.log("EXP:" + token.data);
 515             switch (token.type) {
 516                 case 'PUNC':
 517                     switch(token.data) {
 518
 519                         case ';':
 520                         case ',':
 521                             if (this.braceNesting == expressionBraceNesting &&
 522                                     bracketNesting == 0 &&
 523                                     parensNesting == 0) {
 524
 525                                 return;
 526                             }
 527                             break;
 528
 529
 530
 531                         case '{': //Token.LC:
 532                             isObjectLitAr.push(false);
 533
 534                             this.braceNesting++;
 535                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 536                             break;
 537
 538                         case '}': //Token.RC:
 539                             this.braceNesting--;
 540                             isObjectLitAr.pop();
 541                             //print(">>>>> EXP POP" + this.braceNesting);
 542                            // assert braceNesting >= expressionBraceNesting;
 543                             break;
 544
 545                         case '[': //Token.LB:
 546                             bracketNesting++;
 547                             break;
 548
 549                         case ']': //Token.RB:
 550                             bracketNesting--;
 551                             break;
 552
 553                         case '(': //Token.LP:
 554                             parensNesting++;
 555                             break;
 556
 557                         case ')': //Token.RP:
 558                             parensNesting--;
 559                             break;
 560                     }
 561                     break;
 562
 563                 case 'STRN': // used for object lit detection..
 564                     if (this.ts.lookTok(-1).data == "{" && this.ts.lookTok(1).data == ":" ) {
 565                         // then we are in an object lit.. -> we need to flag the brace as such...
 566                         isObjectLitAr.pop();
 567                         isObjectLitAr.push(true);
 568                         //print(">>>>> EXP PUSH(true)");
 569                     }
 570
 571
 572
 573                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 574                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ":"  &&
 575                         ( this.ts.lookTok(-1).data == "{"  ||  this.ts.lookTok(-1).data == "," )) {
 576                         // see if we can replace..
 577                         // remove the quotes..
 578                         var str = token.data.substring(1,token.data.length-1);
 579                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 580                             token.outData = str;
 581                         }
 582
 583
 584
 585                     }
 586
 587                     break;
 588
 589
 590
 591                 case 'NAME':
 592
 593                     symbol = token.data;
 594                     print("in NAME = " + token.toString());
 595                     print("in NAME 0: " + this.ts.look(0).toString());
 596                     print("in NAME 2: " + this.ts.lookTok(2).toString());
 597                     if (this.ts.look(0).data == "{"  && this.ts.lookTok(2).data == ":") {
 598                         // then we are in an object lit.. -> we need to flag the brace as such...
 599                         isObjectLitAr.pop();
 600                         isObjectLitAr.push(true);
 601                          //print(">>>>> EXP  PUSH(true)");
 602                         break;
 603                     }
 604
 605                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 606                     print ("isInObjectLitAr : " + isInObjectLitAr + ' ' + token.toString());
 607
 608                     if (isInObjectLitAr && this.ts.lookTok(0).data == "," && this.ts.lookTok(2).data == ":") {
 609                         break;
 610                     }
 611                     //print(this.ts.lookTok(0).data);
 612                     if (this.ts.lookTok(0).data == ".") {
 613                         //skip '.'
 614                         break;
 615                     }
 616
 617                      if (this.mode == 'PASS2_SYMBOL_TREE') {
 618
 619                         identifier = this.getIdentifier(symbol, currentScope);
 620                         //println("<B>??</B>");
 621                         if (identifier == false) {
 622
 623                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 624                                 // Here, we found an undeclared and un-namespaced symbol that is
 625                                 // 3 characters or less in length. Declare it in the global scope.
 626                                 // We don't need to declare longer symbols since they won't cause
 627                                 // any conflict with other munged symbols.
 628                                 this.globalScope.declareIdentifier(symbol, token);
 629                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 630                             } else {
 631                                 //println("undeclared")
 632                             }
 633
 634
 635                         } else {
 636                             //println("<B>++</B>");
 637                             token.identifier = identifier;
 638                             identifier.refcount++;
 639                         }
 640
 641                     }
 642                     break;
 643
 644
 645
 646
 647                     //println("<B>EID</B>");
 648                  case 'KEYW':
 649
 650                     if (token.name == "FUNCTION") {
 651
 652                         this.parseFunctionDeclaration();
 653                         break;
 654                     }
 655
 656
 657
 658                     symbol = token.data;
 659                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 660
 661                         if (symbol == "eval") {
 662                             if (this.ts.look(-1).type == 'COMM') {
 663                                 // look for eval:var:noreplace\n
 664                                 var _t = this;
 665                                 this.ts.look(-1).data.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 666                                     var hi = _t.getIdentifier(a, currentScope);
 667                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 668                                     if (hi) {
 669                                       //  println("PROTECT "+a+" from munge");
 670                                         hi.toMunge = false;
 671                                     }
 672
 673
 674                                 });
 675
 676                             } else {
 677                                 this.protectScopeFromObfuscation(currentScope);
 678                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 679                             }
 680
 681
 682                         }
 683                         break;
 684                     }
 685
 686             }
 687             if (!this.ts.nextTok()) break;
 688         }
 689     },
 690
 691
 692     parseCatch : function() {
 693
 694         var symbol;
 695         var token;
 696         var currentScope;
 697         var identifier;
 698
 699         //token = getToken(-1);
 700         //assert token.getType() == Token.CATCH;
 701         token = this.ts.nextTok();
 702         //assert token.getType() == Token.LP; (
 703         token = this.ts.nextTok();
 704         //assert token.getType() == Token.NAME;
 705
 706         symbol = token.data;
 707         currentScope = this.scopes[this.scopes.length-1];
 708
 709         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 710             // We must declare the exception identifier in the containing function
 711             // scope to avoid errors related to the obfuscation process. No need to
 712             // display a warning if the symbol was already declared here...
 713             currentScope.declareIdentifier(symbol, token);
 714         } else {
 715             //?? why inc the refcount?? - that should be set when building the tree???
 716             identifier = this.getIdentifier(symbol, currentScope);
 717             identifier.refcount++;
 718         }
 719
 720         token = this.ts.nextTok();
 721         //assert token.getType() == Token.RP; // )
 722     },
 723
 724     parseFunctionDeclaration : function()
 725     {
 726        // print("PARSE FUNCTION");
 727         var symbol;
 728         var token;
 729         var currentScope  = false;
 730         var fnScope = false;
 731         var identifier;
 732         //this.logR("<B>PARSING FUNCTION</B>");
 733         currentScope = this.scopes[this.scopes.length-1];
 734
 735         token = this.ts.nextTok();
 736         if (token.type == "NAME") {
 737             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 738                 // Get the name of the function and declare it in the current scope.
 739                 symbol = token.data;
 740                 if (currentScope.getIdentifier(symbol) != false) {
 741                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 742                 }
 743                 currentScope.declareIdentifier(symbol,token);
 744             }
 745             token =  this.ts.nextTok();
 746         }
 747
 748         //assert token.getType() == Token.LP;
 749         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 750             fnScope = new Scope(this.braceNesting, currentScope, token.n, '');
 751
 752             //println("STORING SCOPE" + this.ts.cursor);
 753
 754             this.indexedScopes[this.ts.cursor] = fnScope;
 755
 756         } else {
 757             //qln("FETCHING SCOPE" + this.ts.cursor);
 758             fnScope = this.indexedScopes[this.ts.cursor];
 759
 760         }
 761
 762         // Parse function arguments.
 763         var argpos = 0;
 764         while (this.ts.lookTok().data != ')') { //(token = consumeToken()).getType() != Token.RP) {
 765             token = this.ts.nextTok();
 766            // print ("FUNC ARGS: " + token.toString())
 767             //assert token.getType() == Token.NAME ||
 768             //        token.getType() == Token.COMMA;
 769             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 770                 symbol = token.data;
 771                 identifier = fnScope.declareIdentifier(symbol,token);
 772                 if (symbol == "$super" && argpos == 0) {
 773                     // Exception for Prototype 1.6...
 774                     identifier.preventMunging();
 775                 }
 776                 argpos++;
 777             }
 778         }
 779
 780         token = this.ts.nextTok();
 781         // assert token.getType() == Token.LC;
 782         this.braceNesting++;
 783
 784         token = this.ts.nextTok();
 785         if (token.type == "STRN" && this.ts.lookTok(1).data == ';') {
 786             /*
 787
 788             NOT SUPPORTED YET!?!!?!
 789
 790             // This is a hint. Hints are empty statements that look like
 791             // "localvar1:nomunge, localvar2:nomunge"; They allow developers
 792             // to prevent specific symbols from getting obfuscated (some heretic
 793             // implementations, such as Prototype 1.6, require specific variable
 794             // names, such as $super for example, in order to work appropriately.
 795             // Note: right now, only "nomunge" is supported in the right hand side
 796             // of a hint. However, in the future, the right hand side may contain
 797             // other values.
 798             consumeToken();
 799             String hints = token.getValue();
 800             // Remove the leading and trailing quotes...
 801             hints = hints.substring(1, hints.length() - 1).trim();
 802             StringTokenizer st1 = new StringTokenizer(hints, ",");
 803             while (st1.hasMoreTokens()) {
 804                 String hint = st1.nextToken();
 805                 int idx = hint.indexOf(':');
 806                 if (idx <= 0 || idx >= hint.length() - 1) {
 807                     if (mode == BUILDING_SYMBOL_TREE) {
 808                         // No need to report the error twice, hence the test...
 809                         this.warn("Invalid hint syntax: " + hint, true);
 810                     }
 811                     break;
 812                 }
 813                 String variableName = hint.substring(0, idx).trim();
 814                 String variableType = hint.substring(idx + 1).trim();
 815                 if (mode == BUILDING_SYMBOL_TREE) {
 816                     fnScope.addHint(variableName, variableType);
 817                 } else if (mode == CHECKING_SYMBOL_TREE) {
 818                     identifier = fnScope.getIdentifier(variableName);
 819                     if (identifier != null) {
 820                         if (variableType.equals("nomunge")) {
 821                             identifier.preventMunging();
 822                         } else {
 823                             this.warn("Unsupported hint value: " + hint, true);
 824                         }
 825                     } else {
 826                         this.warn("Hint refers to an unknown identifier: " + hint, true);
 827                     }
 828                 }
 829             }
 830             */
 831         }
 832
 833         this.parseScope(fnScope);
 834         // now pop it off the stack!!!
 835
 836
 837
 838     },
 839
 840     protectScopeFromObfuscation : function(scope) {
 841             //assert scope != null;
 842
 843         if (scope == this.globalScope) {
 844             // The global scope does not get obfuscated,
 845             // so we don't need to worry about it...
 846             return;
 847         }
 848
 849         // Find the highest local scope containing the specified scope.
 850         while (scope && scope.parent != this.globalScope) {
 851             scope = scope.parent;
 852         }
 853
 854         //assert scope.getParentScope() == globalScope;
 855         scope.preventMunging();
 856     },
 857
 858     getIdentifier: function(symbol, scope) {
 859         var identifier;
 860         while (scope != false) {
 861             identifier = scope.getIdentifier(symbol);
 862             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 863             if (identifier) {
 864                 return identifier;
 865             }
 866             scope = scope.parent;
 867         }
 868         return false;
 869     }
 870 };