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
 213         token = this.ts.lookTok(1);
 214         while (token) {
 215           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 216              //print(scopeIndent + 'OBJLIT.len='+ isObjectLitAr.length + ' ' + token.toString());
 217             //this.log(token.data);
 218             if (token.type == 'NAME') {
 219             //    print('*' + token.data);
 220             }
 221             switch(token.type + '.' + token.name) {
 222                 case "KEYW.VAR":
 223                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 224
 225                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 226                     while (true) {
 227                         token = this.ts.nextTok();
 228                         !this.debug|| print( token.toString());
 229
 230                         if (!token) { // can return false at EOF!
 231                             break;
 232                         }
 233                         if (token.name == "VAR" || token.data == ',') { // kludge..
 234                             continue;
 235                         }
 236                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 237                         if (token.type !="NAME") {
 238                             for(var i = Math.max(this.ts.cursor-10,0); i < this.ts.cursor+1; i++) {
 239                                 print(this.ts.tokens[i].toString());
 240                             }
 241
 242                             print( "var without ident");
 243                             Seed.quit()
 244                         }
 245
 246
 247                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 248                             identifier = scope.getIdentifier(token.data) ;
 249
 250                             if (identifier == false) {
 251                                 scope.declareIdentifier(token.data, token);
 252                             } else {
 253                                 token.identifier = identifier;
 254                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 255                             }
 256                         }
 257
 258                         token = this.ts.nextTok();
 259                         !this.debug|| print(token.toString());
 260                         /*
 261                         assert token.getType() == Token.SEMI ||
 262                                 token.getType() == Token.ASSIGN ||
 263                                 token.getType() == Token.COMMA ||
 264                                 token.getType() == Token.IN;
 265                         */
 266                         if (token.name == "IN") {
 267                             break;
 268                         } else {
 269                             //var bn = this.braceNesting;
 270                             this.parseExpression();
 271                             //this.braceNesting = bn;
 272                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 273
 274                             token = this.ts.lookTok(1);
 275                             !this.debug|| print("AFTER EXP: " + token.toString());
 276                             if (token.data == ';') {
 277                                 break;
 278                             }
 279                         }
 280                     }
 281                     break;
 282                 case "KEYW.FUNCTION":
 283                     //println("<i>"+token.data+"</i>");
 284                      var bn = this.braceNesting;
 285                     this.parseFunctionDeclaration();
 286                      this.braceNesting = bn;
 287                     break;
 288
 289                 case "PUNC.LEFT_CURLY": // {
 290                     //println("<i>"+token.data+"</i>");
 291                     isObjectLitAr.push(false);
 292                     this.braceNesting++;
 293
 294                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 295                     break;
 296
 297                 case "PUNC.RIGHT_CURLY": // }
 298                     //println("<i>"+token.data+"</i>");
 299                     this.braceNesting--;
 300                     isObjectLitAr.pop();
 301                     //print(">>>>>> OBJLIT POP"+ this.braceNesting);
 302                         //assert braceNesting >= scope.getBra ceNesting();
 303
 304                     if (this.braceNesting < expressionBraceNesting) {
 305                         var ls = this.scopes.pop();
 306                         ls.getUsedSymbols();
 307                         // eat symbol if we are currently at {
 308                         if (this.ts.look(0).data == '{') {
 309                             this.ts.nextTok();
 310                         }
 311
 312                         //print("<<<<<<<EXIT SCOPE" +this.scopes.length);
 313                         return;
 314                     }
 315                     break;
 316
 317                 case "KEYW.WITH":
 318                     //println("<i>"+token.data+"</i>");
 319                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 320                         // Inside a 'with' block, it is impossible to figure out
 321                         // statically whether a symbol is a local variable or an
 322                         // object member. As a consequence, the only thing we can
 323                         // do is turn the obfuscation off for the highest scope
 324                         // containing the 'with' block.
 325                         this.protectScopeFromObfuscation(scope);
 326                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 327                     }
 328                     break;
 329
 330                 case "KEYW.CATCH":
 331                     //println("<i>"+token.data+"</i>");
 332                     this.parseCatch();
 333                     break;
 334                 /*
 335                 case Token.SPECIALCOMMENT:
 336                         if (mode == BUILDING_SYMBOL_TREE) {
 337                             protectScopeFromObfuscation(scope);
 338                             this.warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression." : ""), true);
 339                         }
 340                         break;
 341                 */
 342
 343                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 344                 case "STRN.SINGLE_QUOTE":
 345                     //println("<i>"+token.data+"</i>");
 346                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 347                         // then we are in an object lit.. -> we need to flag the brace as such...
 348                         isObjectLitAr.pop();
 349                         isObjectLitAr.push(true);
 350                         //print(">>>>>> OBJLIT REPUSH(true)");
 351                     }
 352                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 353
 354                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 355                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 356                         // see if we can replace..
 357                         // remove the quotes..
 358                         // should do a bit more checking!!!! (what about wierd char's in the string..
 359                         var str = token.data.substring(1,token.data.length-1);
 360                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 361                             token.outData = str;
 362                         }
 363
 364
 365
 366                     }
 367
 368
 369
 370                     break;
 371
 372                 case "NAME.NAME":
 373
 374                     //print("DEAL WITH NAME:");
 375                     // got identifier..
 376
 377                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 378                     if ((this.ts.lookTok(-1).data == "{") && (this.ts.lookTok(1).data == ":")) {
 379                         isObjectLitAr.pop();
 380                         isObjectLitAr.push(true);
 381                         //print(">>>>>> OBJLIT REPUSH(true)");
 382                         //println("<i>"+token.data+"</i>");
 383                         break;
 384                     }
 385                    // print("DEAL WITH obj lit:");
 386                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 387
 388                     if (isInObjectLitAr && (this.ts.lookTok(1).data == ":") && (this.ts.lookTok(-1).data == ",")) {
 389                         // skip, it's an object lit key..
 390                         //println("<i>"+token.data+"</i>");
 391                         break;
 392                     }
 393
 394
 395                     // skip anyting with "." before it..!!
 396
 397                     if (this.ts.lookTok(-1).data == ".") {
 398                         // skip, it's an object prop.
 399                         //println("<i>"+token.data+"</i>");
 400                         break;
 401                     }
 402                     symbol = token.data;
 403                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 404
 405                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 406
 407                         //print ("MUNGE?" + symbol);
 408
 409                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 410
 411                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 412                         identifier = this.getIdentifier(symbol, scope);
 413
 414                         if (identifier == false) {
 415 // BUG!find out where builtin is defined...
 416                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 417                                 // Here, we found an undeclared and un-namespaced symbol that is
 418                                 // 3 characters or less in length. Declare it in the global scope.
 419                                 // We don't need to declare longer symbols since they won't cause
 420                                 // any conflict with other munged symbols.
 421                                 this.globalScope.declareIdentifier(symbol, token);
 422                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 423                             }
 424
 425                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 426                         } else {
 427                             token.identifier = identifier;
 428                             identifier.refcount++;
 429                         }
 430                     }
 431
 432                     break;
 433                     //println("<B>SID</B>");
 434                 default:
 435                     if (token.type != 'KEYW') {
 436                         break;
 437                     }
 438                    // print("Check eval:");
 439
 440                     symbol = token.data;
 441
 442                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 443
 444                         if (symbol == "eval") {
 445                             // look back one and see if we can find a comment!!!
 446                             if (this.ts.look(-1).type == "COMM") {
 447                                 // look for eval:var:noreplace\n
 448                                 var _t = this;
 449                                 this.ts.look(-1).data.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 450
 451                                     var hi = _t.getIdentifier(a, scope);
 452                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 453                                     if (hi) {
 454                                      //   println("PROTECT "+a+" from munge");
 455                                         hi.toMunge = false;
 456                                     }
 457
 458                                 });
 459
 460
 461                             } else {
 462
 463
 464                                 this.protectScopeFromObfuscation(scope);
 465                                 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);
 466                             }
 467
 468                         }
 469
 470                     }
 471                     break;
 472
 473
 474             } // end switch
 475
 476
 477             //this.timerPrint("parseScope TOK : " + token.toString());
 478             token = this.ts.nextTok();
 479             //if (this.ts.nextT()) break;
 480
 481         }
 482         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 483     },
 484
 485
 486     parseExpression : function() {
 487
 488         // Parse the expression until we encounter a comma or a semi-colon
 489         // in the same brace nesting, bracket nesting and paren nesting.
 490         // Parse functions if any...
 491         //println("<i>EXP</i><BR/>");
 492         !this.debug || print("PARSE EXPR");
 493         print(">> ENTER EXPRESSION");
 494
 495         // for printing stuff..
 496
 497
 498
 499         var symbol;
 500         var token;
 501         var currentScope;
 502         var identifier;
 503
 504         var expressionBraceNesting = this.braceNesting;
 505         var bracketNesting = 0;
 506         var parensNesting = 0;
 507         var isInObjectLitAr;
 508         var isObjectLitAr = [ false ];
 509         while (token = this.ts.lookTok()) {
 510
 511
 512
 513             currentScope = this.scopes[this.scopes.length-1];
 514
 515             var scopeIndent = '';
 516             this.scopes.forEach(function() {
 517                 scopeIndent += '   ';
 518             });
 519
 520             print(scopeIndent + 'OBJLIT.len='+ isObjectLitAr.length + ' ' + token.data);
 521
 522             //println("<i>"+token.data+"</i>");
 523             //this.log("EXP:" + token.data);
 524             switch (token.type) {
 525                 case 'PUNC':
 526                     switch(token.data) {
 527
 528                         case ';':
 529                         case ',':
 530                             if (this.braceNesting == expressionBraceNesting &&
 531                                     bracketNesting == 0 &&
 532                                     parensNesting == 0) {
 533                                 print(scopeIndent + "<< EXIT EXPRESSION");
 534                                 return;
 535                             }
 536                             break;
 537
 538
 539
 540                         case '{': //Token.LC:
 541                             isObjectLitAr.push(false);
 542
 543                             this.braceNesting++;
 544                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 545                             break;
 546
 547                         case '}': //Token.RC:
 548                             this.braceNesting--;
 549                             isObjectLitAr.pop();
 550                             //print(">>>>> EXP POP" + this.braceNesting);
 551                            // assert braceNesting >= expressionBraceNesting;
 552                             break;
 553
 554                         case '[': //Token.LB:
 555                             bracketNesting++;
 556                             break;
 557
 558                         case ']': //Token.RB:
 559                             bracketNesting--;
 560                             break;
 561
 562                         case '(': //Token.LP:
 563                             parensNesting++;
 564                             break;
 565
 566                         case ')': //Token.RP:
 567                             parensNesting--;
 568                             break;
 569                     }
 570                     break;
 571
 572                 case 'STRN': // used for object lit detection..
 573                     if (this.ts.lookTok(-1).data == "{" && this.ts.lookTok(1).data == ":" ) {
 574                         // then we are in an object lit.. -> we need to flag the brace as such...
 575                         isObjectLitAr.pop();
 576                         isObjectLitAr.push(true);
 577                         //print(">>>>> EXP PUSH(true)");
 578                     }
 579
 580
 581
 582                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 583                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ":"  &&
 584                         ( this.ts.lookTok(-1).data == "{"  ||  this.ts.lookTok(-1).data == "," )) {
 585                         // see if we can replace..
 586                         // remove the quotes..
 587                         var str = token.data.substring(1,token.data.length-1);
 588                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 589                             token.outData = str;
 590                         }
 591
 592
 593
 594                     }
 595
 596                     break;
 597
 598
 599
 600                 case 'NAME':
 601
 602                     symbol = token.data;
 603                     //print("in NAME = " + token.toString());
 604                     //print("in NAME 0: " + this.ts.look(0).toString());
 605                     //print("in NAME 2: " + this.ts.lookTok(2).toString());
 606                     if (this.ts.look(0).data == "{"  && this.ts.lookTok(2).data == ":") {
 607                         // then we are in an object lit.. -> we need to flag the brace as such...
 608                         isObjectLitAr.pop();
 609                         isObjectLitAr.push(true);
 610                          //print(">>>>> EXP  PUSH(true)");
 611                         break;
 612                     }
 613
 614                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 615                     //print ("isInObjectLitAr : " + isInObjectLitAr + ' ' + token.toString());
 616
 617                     if (isInObjectLitAr && this.ts.lookTok(0).data == "," && this.ts.lookTok(2).data == ":") {
 618                         break;
 619                     }
 620                     //print(this.ts.lookTok(0).data);
 621                     if (this.ts.lookTok(0).data == ".") {
 622                         //skip '.'
 623                         break;
 624                     }
 625
 626                      if (this.mode == 'PASS2_SYMBOL_TREE') {
 627
 628                         identifier = this.getIdentifier(symbol, currentScope);
 629                         //println("<B>??</B>");
 630                         if (identifier == false) {
 631
 632                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 633                                 // Here, we found an undeclared and un-namespaced symbol that is
 634                                 // 3 characters or less in length. Declare it in the global scope.
 635                                 // We don't need to declare longer symbols since they won't cause
 636                                 // any conflict with other munged symbols.
 637                                 this.globalScope.declareIdentifier(symbol, token);
 638                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 639                             } else {
 640                                 //println("undeclared")
 641                             }
 642
 643
 644                         } else {
 645                             //println("<B>++</B>");
 646                             token.identifier = identifier;
 647                             identifier.refcount++;
 648                         }
 649
 650                     }
 651                     break;
 652
 653
 654
 655
 656                     //println("<B>EID</B>");
 657                  case 'KEYW':
 658
 659                     if (token.name == "FUNCTION") {
 660
 661                         this.parseFunctionDeclaration();
 662                         break;
 663                     }
 664
 665
 666
 667                     symbol = token.data;
 668                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 669
 670                         if (symbol == "eval") {
 671                             if (this.ts.look(-1).type == 'COMM') {
 672                                 // look for eval:var:noreplace\n
 673                                 var _t = this;
 674                                 this.ts.look(-1).data.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 675                                     var hi = _t.getIdentifier(a, currentScope);
 676                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 677                                     if (hi) {
 678                                       //  println("PROTECT "+a+" from munge");
 679                                         hi.toMunge = false;
 680                                     }
 681
 682
 683                                 });
 684
 685                             } else {
 686                                 this.protectScopeFromObfuscation(currentScope);
 687                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 688                             }
 689
 690
 691                         }
 692                         break;
 693                     }
 694
 695             }
 696             if (!this.ts.nextTok()) break;
 697         }
 698     },
 699
 700
 701     parseCatch : function() {
 702
 703         var symbol;
 704         var token;
 705         var currentScope;
 706         var identifier;
 707
 708         //token = getToken(-1);
 709         //assert token.getType() == Token.CATCH;
 710         token = this.ts.nextTok();
 711         //assert token.getType() == Token.LP; (
 712         token = this.ts.nextTok();
 713         //assert token.getType() == Token.NAME;
 714
 715         symbol = token.data;
 716         currentScope = this.scopes[this.scopes.length-1];
 717
 718         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 719             // We must declare the exception identifier in the containing function
 720             // scope to avoid errors related to the obfuscation process. No need to
 721             // display a warning if the symbol was already declared here...
 722             currentScope.declareIdentifier(symbol, token);
 723         } else {
 724             //?? why inc the refcount?? - that should be set when building the tree???
 725             identifier = this.getIdentifier(symbol, currentScope);
 726             identifier.refcount++;
 727         }
 728
 729         token = this.ts.nextTok();
 730         //assert token.getType() == Token.RP; // )
 731     },
 732
 733     parseFunctionDeclaration : function()
 734     {
 735        // print("PARSE FUNCTION");
 736         var symbol;
 737         var token;
 738         var currentScope  = false;
 739         var fnScope = false;
 740         var identifier;
 741         //this.logR("<B>PARSING FUNCTION</B>");
 742         currentScope = this.scopes[this.scopes.length-1];
 743
 744         token = this.ts.nextTok();
 745         if (token.type == "NAME") {
 746             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 747                 // Get the name of the function and declare it in the current scope.
 748                 symbol = token.data;
 749                 if (currentScope.getIdentifier(symbol) != false) {
 750                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 751                 }
 752                 currentScope.declareIdentifier(symbol,token);
 753             }
 754             token =  this.ts.nextTok();
 755         }
 756
 757         //assert token.getType() == Token.LP;
 758         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 759             fnScope = new Scope(this.braceNesting, currentScope, token.n, '');
 760
 761             //println("STORING SCOPE" + this.ts.cursor);
 762
 763             this.indexedScopes[this.ts.cursor] = fnScope;
 764
 765         } else {
 766             //qln("FETCHING SCOPE" + this.ts.cursor);
 767             fnScope = this.indexedScopes[this.ts.cursor];
 768
 769         }
 770
 771         // Parse function arguments.
 772         var argpos = 0;
 773         while (this.ts.lookTok().data != ')') { //(token = consumeToken()).getType() != Token.RP) {
 774             token = this.ts.nextTok();
 775            // print ("FUNC ARGS: " + token.toString())
 776             //assert token.getType() == Token.NAME ||
 777             //        token.getType() == Token.COMMA;
 778             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 779                 symbol = token.data;
 780                 identifier = fnScope.declareIdentifier(symbol,token);
 781                 if (symbol == "$super" && argpos == 0) {
 782                     // Exception for Prototype 1.6...
 783                     identifier.preventMunging();
 784                 }
 785                 argpos++;
 786             }
 787         }
 788
 789         token = this.ts.nextTok();
 790         // assert token.getType() == Token.LC;
 791         this.braceNesting++;
 792
 793         token = this.ts.nextTok();
 794         if (token.type == "STRN" && this.ts.lookTok(1).data == ';') {
 795             /*
 796
 797             NOT SUPPORTED YET!?!!?!
 798
 799             // This is a hint. Hints are empty statements that look like
 800             // "localvar1:nomunge, localvar2:nomunge"; They allow developers
 801             // to prevent specific symbols from getting obfuscated (some heretic
 802             // implementations, such as Prototype 1.6, require specific variable
 803             // names, such as $super for example, in order to work appropriately.
 804             // Note: right now, only "nomunge" is supported in the right hand side
 805             // of a hint. However, in the future, the right hand side may contain
 806             // other values.
 807             consumeToken();
 808             String hints = token.getValue();
 809             // Remove the leading and trailing quotes...
 810             hints = hints.substring(1, hints.length() - 1).trim();
 811             StringTokenizer st1 = new StringTokenizer(hints, ",");
 812             while (st1.hasMoreTokens()) {
 813                 String hint = st1.nextToken();
 814                 int idx = hint.indexOf(':');
 815                 if (idx <= 0 || idx >= hint.length() - 1) {
 816                     if (mode == BUILDING_SYMBOL_TREE) {
 817                         // No need to report the error twice, hence the test...
 818                         this.warn("Invalid hint syntax: " + hint, true);
 819                     }
 820                     break;
 821                 }
 822                 String variableName = hint.substring(0, idx).trim();
 823                 String variableType = hint.substring(idx + 1).trim();
 824                 if (mode == BUILDING_SYMBOL_TREE) {
 825                     fnScope.addHint(variableName, variableType);
 826                 } else if (mode == CHECKING_SYMBOL_TREE) {
 827                     identifier = fnScope.getIdentifier(variableName);
 828                     if (identifier != null) {
 829                         if (variableType.equals("nomunge")) {
 830                             identifier.preventMunging();
 831                         } else {
 832                             this.warn("Unsupported hint value: " + hint, true);
 833                         }
 834                     } else {
 835                         this.warn("Hint refers to an unknown identifier: " + hint, true);
 836                     }
 837                 }
 838             }
 839             */
 840         }
 841
 842         this.parseScope(fnScope);
 843         // now pop it off the stack!!!
 844
 845
 846
 847     },
 848
 849     protectScopeFromObfuscation : function(scope) {
 850             //assert scope != null;
 851
 852         if (scope == this.globalScope) {
 853             // The global scope does not get obfuscated,
 854             // so we don't need to worry about it...
 855             return;
 856         }
 857
 858         // Find the highest local scope containing the specified scope.
 859         while (scope && scope.parent != this.globalScope) {
 860             scope = scope.parent;
 861         }
 862
 863         //assert scope.getParentScope() == globalScope;
 864         scope.preventMunging();
 865     },
 866
 867     getIdentifier: function(symbol, scope) {
 868         var identifier;
 869         while (scope != false) {
 870             identifier = scope.getIdentifier(symbol);
 871             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 872             if (identifier) {
 873                 return identifier;
 874             }
 875             scope = scope.parent;
 876         }
 877         return false;
 878     }
 879 };