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 *
  12 * Need to make this alot simpler...
  13 *
  14 * so debugging is possible.
  15 *
  16 *
  17 * at present it just runs along the stream and finds stuff then calls parseExpr .. etc,,
  18 *
  19 *
  20 * It would be better to parse blocks of code rather than the whole stream..
  21 *
  22 *
  23 *
  24 *
  25 *
  26 */
  27
  28 ScopeParser = function(ts) {
  29     this.ts = ts; // {TokenStream}
  30     this.warnings = [];
  31     this.scopes = [];
  32     this.indexedScopes = {};
  33     this.timer = new Date() * 1;
  34     this.debug = false;
  35 }
  36
  37 // list of keywords that should not be used in object literals.
  38 ScopeParser.idents = [
  39         "break",
  40         "case",
  41         "continue",
  42         "default",
  43         "delete",
  44         "do",
  45         "else",
  46         "export",
  47         "false",
  48         "for",
  49         "function",
  50         "if",
  51         "import",
  52         "in",
  53         "new",
  54         "null",
  55         "return",
  56         "switch",
  57         "this",
  58         "true",
  59         "typeof",
  60         "var",
  61         "void",
  62         "while",
  63         "with",
  64
  65         "catch",
  66         "class",
  67         "const",
  68         "debugger",
  69         "enum",
  70         "extends",
  71         "finally",
  72         "super",
  73         "throw",
  74         "try",
  75
  76         "abstract",
  77         "boolean",
  78         "byte",
  79         "char",
  80         "double",
  81         "final",
  82         "float",
  83         "goto",
  84         "implements",
  85         "instanceof",
  86         "int",
  87         "interface",
  88         "long",
  89         "native",
  90         "package",
  91         "private",
  92         "protected",
  93         "public",
  94         "short",
  95         "static",
  96         "synchronized",
  97         "throws",
  98         "transient",
  99                 "include",
 100                 "undefined"
 101 ];
 102
 103
 104 ScopeParser.prototype = {
 105     timer: 0,
 106     timerPrint: function (str) {
 107         var ntime = new Date() * 1;
 108         var tdif =  ntime -this.timer;
 109         this.timer = ntime;
 110         var pref = '';
 111         if (tdif > 100) { //slower ones..
 112             pref = '***';
 113         }
 114         println(pref+'['+tdif+']'+str);
 115
 116     },
 117     warn: function(s) {
 118         //print('****************' + s);
 119         this.warnings.push(s);
 120         //println("WARNING:" + htmlescape(s) + "<BR>");
 121     },
 122     // defaults should not be initialized here =- otherwise they get duped on new, rather than initalized..
 123     warnings : false,
 124     ts : false,
 125     scopes : false,
 126     global : false,
 127     mode : "", //"BUILDING_SYMBOL_TREE",
 128     braceNesting : 0,
 129     indexedScopes : false,
 130     munge: true,
 131
 132
 133
 134
 135
 136     buildSymbolTree : function()
 137     {
 138         //println("<PRE>");
 139
 140         this.ts.rewind();
 141         this.braceNesting = 0;
 142         this.scopes = [];
 143
 144
 145
 146
 147         this.globalScope = new  Scope(-1, false, -1, '');
 148         indexedScopes = { 0 : this.globalScope };
 149
 150         this.mode = 'BUILDING_SYMBOL_TREE';
 151         this.parseScope(this.globalScope);
 152
 153         //print("---------------END PASS 1 ---------------- ");
 154
 155     },
 156     mungeSymboltree : function()
 157     {
 158
 159         if (!this.munge) {
 160             return;
 161         }
 162
 163         // One problem with obfuscation resides in the use of undeclared
 164         // and un-namespaced global symbols that are 3 characters or less
 165         // in length. Here is an example:
 166         //
 167         //     var declaredGlobalVar;
 168         //
 169         //     function declaredGlobalFn() {
 170         //         var localvar;
 171         //         localvar = abc; // abc is an undeclared global symbol
 172         //     }
 173         //
 174         // In the example above, there is a slim chance that localvar may be
 175         // munged to 'abc', conflicting with the undeclared global symbol
 176         // abc, creating a potential bug. The following code detects such
 177         // global symbols. This must be done AFTER the entire file has been
 178         // parsed, and BEFORE munging the symbol tree. Note that declaring
 179         // extra symbols in the global scope won't hurt.
 180         //
 181         // Note: Since we go through all the tokens to do this, we also use
 182         // the opportunity to count how many times each identifier is used.
 183
 184         this.ts.rewind();
 185         this.braceNesting = 0;
 186         this.scopes= [];
 187         this.mode = 'PASS2_SYMBOL_TREE';
 188
 189         //println("MUNGING?");
 190
 191         this.parseScope(this.globalScope);
 192         this.globalScope.munge();
 193     },
 194
 195
 196     log : function(str)
 197     {
 198         print ("                    ".substring(0, this.braceNesting*2) + str);
 199
 200         //println("<B>LOG:</B>" + htmlescape(str) + "<BR/>\n");
 201     },
 202     logR : function(str)
 203     {
 204             //println("<B>LOG:</B>" + str + "<BR/>");
 205     },
 206
 207
 208
 209
 210
 211     parseScope : function(scope) // parse a token stream..
 212     {
 213         //this.timerPrint("parseScope EnterScope");
 214         //this.log(">>> ENTER SCOPE" + this.scopes.length);
 215         var symbol;
 216         var token;
 217
 218         var identifier;
 219
 220         var expressionBraceNesting = this.braceNesting + 0;
 221
 222         var parensNesting = 0;
 223
 224         var isObjectLitAr = [ false ];
 225         var isInObjectLitAr;
 226         this.scopes.push(scope);
 227
 228         //var scopeIndent = '';
 229         //this.scopes.forEach(function() {
 230         //    scopeIndent += '   ';
 231         //});
 232         //print(scopeIndent + ">> ENTER SCOPE");
 233
 234
 235
 236
 237         token = this.ts.lookTok(1);
 238         while (token) {
 239           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 240             //this.dumpToken(token , this.scopes, this.braceNesting);
 241             //print('SCOPE:' + token.toString());
 242             //this.log(token.data);
 243             if (token.type == 'NAME') {
 244             //    print('*' + token.data);
 245             }
 246             switch(token.type + '.' + token.name) {
 247                 case "KEYW.VAR":
 248                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 249                     print('SCOPE-VAR:' + token.toString());
 250                     var vstart = this.ts.cursor +1;
 251
 252                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 253                     while (true) {
 254                         token = this.ts.nextTok();
 255                         !this.debug|| print( token.toString());
 256
 257                         if (!token) { // can return false at EOF!
 258                             break;
 259                         }
 260                         if (token.name == "VAR" || token.data == ',') { // kludge..
 261                             continue;
 262                         }
 263                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 264                         if (token.type !="NAME") {
 265                             for(var i = Math.max(this.ts.cursor-10,0); i < this.ts.cursor+1; i++) {
 266                                 print(this.ts.tokens[i].toString());
 267                             }
 268
 269                             print( "var without ident");
 270                             Seed.quit()
 271                         }
 272
 273
 274                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 275                             identifier = scope.getIdentifier(token.data) ;
 276
 277                             if (identifier == false) {
 278                                 scope.declareIdentifier(token.data, token);
 279                             } else {
 280                                 token.identifier = identifier;
 281                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 282                             }
 283                         }
 284
 285                         token = this.ts.nextTok();
 286                         !this.debug|| print(token.toString());
 287                         /*
 288                         assert token.getType() == Token.SEMI ||
 289                                 token.getType() == Token.ASSIGN ||
 290                                 token.getType() == Token.COMMA ||
 291                                 token.getType() == Token.IN;
 292                         */
 293                         if (token.name == "IN") {
 294                             break;
 295                         } else {
 296                             //var bn = this.braceNesting;
 297                             var bn = this.braceNesting;
 298                             this.parseExpression();
 299                             this.braceNesting = bn;
 300                             //this.braceNesting = bn;
 301                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 302
 303                             token = this.ts.lookTok(1);
 304                             !this.debug|| print("AFTER EXP: " + token.toString());
 305                             if (token.data == ';') {
 306                                 break;
 307                             }
 308                         }
 309                     }
 310
 311                     //print("VAR:")
 312                     //this.ts.dump(vstart , this.ts.cursor);
 313
 314                     break;
 315                 case "KEYW.FUNCTION":
 316                     print('SCOPE-FUNC:' + token.toString());
 317                     //println("<i>"+token.data+"</i>");
 318                      var bn = this.braceNesting;
 319                     this.parseFunctionDeclaration();
 320                      this.braceNesting = bn;
 321                     break;
 322
 323                 case "PUNC.LEFT_CURLY": // {
 324                     print('SCOPE-CURLY:' + JSON.stringify(token,null,4));
 325                     //println("<i>"+token.data+"</i>");
 326
 327                     if (token.props) {
 328                         for (var prop in token.props) {
 329                             if (token.props[prop].val.data == 'function') {
 330                                 // parse a function..
 331                                 this.parseFunctProp(token.props[prop]);
 332                                 continue;
 333                             }
 334                             // key value..
 335                             var curTS = this.ts;
 336                             this.ts = new TokenStream(token.props[prop].val);
 337                             this.parseScope(scope);
 338                             this.ts = curTS;
 339
 340                         }
 341
 342                         // it's an object literal..
 343                         // the values could be replaced..
 344
 345                     }
 346
 347                     isObjectLitAr.push(false);
 348                     this.braceNesting++;
 349
 350                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 351                     break;
 352 /*
 353                 case "PUNC.RIGHT_CURLY": // }
 354                     //println("<i>"+token.data+"</i>");
 355                     this.braceNesting--;
 356                     isObjectLitAr.pop();
 357                     //print(">>>>>> OBJLIT POP"+ this.braceNesting);
 358                         //assert braceNesting >= scope.getBra ceNesting();
 359
 360                     if (this.braceNesting < expressionBraceNesting) {
 361                         var ls = this.scopes.pop();
 362                         ls.getUsedSymbols();
 363                         // eat symbol if we are currently at {
 364                         if (this.ts.look(0).data == '{') {
 365                             this.ts.nextTok();
 366                         }
 367
 368                         print("<<<<<<<EXIT SCOPE" +this.scopes.length);
 369                         return;
 370                     }
 371                     break;
 372 */
 373                 case "KEYW.WITH":
 374                     print('SCOPE-WITH:' + token.toString());
 375                     //println("<i>"+token.data+"</i>");
 376                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 377                         // Inside a 'with' block, it is impossible to figure out
 378                         // statically whether a symbol is a local variable or an
 379                         // object member. As a consequence, the only thing we can
 380                         // do is turn the obfuscation off for the highest scope
 381                         // containing the 'with' block.
 382                         this.protectScopeFromObfuscation(scope);
 383                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 384                     }
 385                     break;
 386
 387                 case "KEYW.CATCH":
 388                     print('SCOPE-CATCH:' + token.toString());
 389                     //println("<i>"+token.data+"</i>");
 390                     this.parseCatch();
 391                     break;
 392                 /*
 393                 case Token.SPECIALCOMMENT:
 394                         if (mode == BUILDING_SYMBOL_TREE) {
 395                             protectScopeFromObfuscation(scope);
 396                             this.warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression." : ""), true);
 397                         }
 398                         break;
 399                 */
 400
 401                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 402                 case "STRN.SINGLE_QUOTE":
 403                     print('SCOPE-STRING:' + token.toString());
 404                     //println("<i>"+token.data+"</i>");
 405
 406                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 407                         // then we are in an object lit.. -> we need to flag the brace as such...
 408                         isObjectLitAr.pop();
 409                         isObjectLitAr.push(true);
 410                         //print(">>>>>> OBJLIT REPUSH(true)");
 411                     }
 412                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 413
 414                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 415                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 416                         // see if we can replace..
 417                         // remove the quotes..
 418                         // should do a bit more checking!!!! (what about wierd char's in the string..
 419                         var str = token.data.substring(1,token.data.length-1);
 420                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 421                             token.outData = str;
 422                         }
 423
 424
 425
 426                     }
 427
 428
 429
 430                     break;
 431
 432                 case "NAME.NAME":
 433                     print('SCOPE-NAME:' + token.toString());
 434                     //print("DEAL WITH NAME:");
 435                     // got identifier..
 436
 437                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 438                     if ((this.ts.lookTok(-1).data == "{") && (this.ts.lookTok(1).data == ":")) {
 439                         isObjectLitAr.pop();
 440                         isObjectLitAr.push(true);
 441                         //print(">>>>>> OBJLIT REPUSH(true)");
 442                         //println("<i>"+token.data+"</i>");
 443                         break;
 444                     }
 445                    // print("DEAL WITH obj lit:");
 446                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 447
 448                     if (isInObjectLitAr && (this.ts.lookTok(1).data == ":") && (this.ts.lookTok(-1).data == ",")) {
 449                         // skip, it's an object lit key..
 450                         //println("<i>"+token.data+"</i>");
 451                         break;
 452                     }
 453
 454
 455                     // skip anyting with "." before it..!!
 456
 457                     if (this.ts.lookTok(-1).data == ".") {
 458                         // skip, it's an object prop.
 459                         //println("<i>"+token.data+"</i>");
 460                         break;
 461                     }
 462                     //print("SYMBOL: " + token.toString());
 463
 464                     symbol = token.data;
 465                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 466
 467                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 468
 469                         //print ("MUNGE?" + symbol);
 470
 471                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 472
 473                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 474                         identifier = this.getIdentifier(symbol, scope);
 475
 476                         if (identifier == false) {
 477 // BUG!find out where builtin is defined...
 478                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 479                                 // Here, we found an undeclared and un-namespaced symbol that is
 480                                 // 3 characters or less in length. Declare it in the global scope.
 481                                 // We don't need to declare longer symbols since they won't cause
 482                                 // any conflict with other munged symbols.
 483                                 this.globalScope.declareIdentifier(symbol, token);
 484                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 485                             }
 486
 487                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 488                         } else {
 489                             token.identifier = identifier;
 490                             identifier.refcount++;
 491                         }
 492                     }
 493
 494                     break;
 495                     //println("<B>SID</B>");
 496                 default:
 497                     if (token.type != 'KEYW') {
 498                         break;
 499                     }
 500                     print('SCOPE-KEYW:' + token.toString());
 501                    // print("Check eval:");
 502
 503                     symbol = token.data;
 504
 505                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 506
 507                         if (symbol == "eval") {
 508                             // look back one and see if we can find a comment!!!
 509                             if (this.ts.look(-1).type == "COMM") {
 510                                 // look for eval:var:noreplace\n
 511                                 var _t = this;
 512                                 this.ts.look(-1).data.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 513
 514                                     var hi = _t.getIdentifier(a, scope);
 515                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 516                                     if (hi) {
 517                                      //   println("PROTECT "+a+" from munge");
 518                                         hi.toMunge = false;
 519                                     }
 520
 521                                 });
 522
 523
 524                             } else {
 525
 526
 527                                 this.protectScopeFromObfuscation(scope);
 528                                 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);
 529                             }
 530
 531                         }
 532
 533                     }
 534                     break;
 535
 536
 537             } // end switch
 538
 539
 540             //print("parseScope TOK : " + token.toString());
 541             token = this.ts.nextTok();
 542             //if (this.ts.nextT()) break;
 543
 544         }
 545         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 546     },
 547
 548     expN : 0,
 549     parseExpression : function() {
 550
 551         // Parse the expression until we encounter a comma or a semi-colon
 552         // in the same brace nesting, bracket nesting and paren nesting.
 553         // Parse functions if any...
 554         //println("<i>EXP</i><BR/>");
 555         !this.debug || print("PARSE EXPR");
 556         this.expN++;
 557
 558         // for printing stuff..
 559
 560
 561
 562         var symbol;
 563         var token;
 564         var currentScope;
 565         var identifier;
 566
 567         var expressionBraceNesting = this.braceNesting + 0;
 568         var bracketNesting = 0;
 569         var parensNesting = 0;
 570         var isInObjectLitAr;
 571         var isObjectLitAr = [ false ];
 572
 573         currentScope = this.scopes[this.scopes.length-1];
 574
 575         var scopeIndent = '';
 576         this.scopes.forEach(function() {
 577             scopeIndent += '   ';
 578         });
 579         //print(scopeIndent + ">> ENTER EXPRESSION" + this.expN);
 580         while (token = this.ts.lookTok()) {
 581
 582
 583
 584            /*
 585             // moved out of loop?
 586            currentScope = this.scopes[this.scopes.length-1];
 587
 588             var scopeIndent = '';
 589             this.scopes.forEach(function() {
 590                 scopeIndent += '   ';
 591             });
 592            */
 593
 594            //this.dumpToken(token,  this.scopes, this.braceNesting );
 595            //print('EXP' + this.expN + ':' + token.toString());
 596
 597
 598             //println("<i>"+token.data+"</i>");
 599             //this.log("EXP:" + token.data);
 600             switch (token.type) {
 601                 case 'PUNC':
 602                     switch(token.data) {
 603
 604                         case ';':
 605                         case ',':
 606                             if (this.braceNesting == expressionBraceNesting &&
 607                                     bracketNesting == 0 &&
 608                                     parensNesting == 0) {
 609                                 print(scopeIndent + "<< EXIT EXPRESSION");
 610                                 this.expN--;
 611                                 return;
 612                             }
 613                             break;
 614
 615
 616
 617                         case '{': //Token.LC:
 618                             isObjectLitAr.push(false);
 619
 620                             this.braceNesting++;
 621                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 622                             break;
 623
 624                         case '}': //Token.RC:
 625                             this.braceNesting--;
 626                             isObjectLitAr.pop();
 627                             //print(">>>>> EXP POP" + this.braceNesting);
 628                            // assert braceNesting >= expressionBraceNesting;
 629                             break;
 630
 631                         case '[': //Token.LB:
 632                             bracketNesting++;
 633                             break;
 634
 635                         case ']': //Token.RB:
 636                             bracketNesting--;
 637                             break;
 638
 639                         case '(': //Token.LP:
 640                             parensNesting++;
 641                             break;
 642
 643                         case ')': //Token.RP:
 644                             parensNesting--;
 645                             break;
 646                     }
 647                     break;
 648
 649                 case 'STRN': // used for object lit detection..
 650                     if (this.ts.lookTok(-1).data == "{" && this.ts.lookTok(1).data == ":" ) {
 651                         // then we are in an object lit.. -> we need to flag the brace as such...
 652                         isObjectLitAr.pop();
 653                         isObjectLitAr.push(true);
 654                         //print(">>>>> EXP PUSH(true)");
 655                     }
 656
 657
 658
 659                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 660                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ":"  &&
 661                         ( this.ts.lookTok(-1).data == "{"  ||  this.ts.lookTok(-1).data == "," )) {
 662                         // see if we can replace..
 663                         // remove the quotes..
 664                         var str = token.data.substring(1,token.data.length-1);
 665                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 666                             token.outData = str;
 667                         }
 668
 669
 670
 671                     }
 672
 673                     break;
 674
 675
 676
 677                 case 'NAME':
 678
 679                     symbol = token.data;
 680                     //print("in NAME = " + token.toString());
 681                     //print("in NAME 0: " + this.ts.look(0).toString());
 682                     //print("in NAME 2: " + this.ts.lookTok(2).toString());
 683                     if (this.ts.look(0).data == "{"  && this.ts.lookTok(2).data == ":") {
 684                         // then we are in an object lit.. -> we need to flag the brace as such...
 685                         isObjectLitAr.pop();
 686                         isObjectLitAr.push(true);
 687                          //print(">>>>> EXP  PUSH(true)");
 688                         break;
 689                     }
 690
 691                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 692                     //print ("isInObjectLitAr : " + isInObjectLitAr + ' ' + token.toString());
 693
 694                     if (isInObjectLitAr && this.ts.lookTok(0).data == "," && this.ts.lookTok(2).data == ":") {
 695                         break;
 696                     }
 697                     //print(this.ts.lookTok(0).data);
 698                     if (this.ts.lookTok(0).data == ".") {
 699                         //skip '.'
 700                         break;
 701                     }
 702
 703                      if (this.mode == 'PASS2_SYMBOL_TREE') {
 704
 705                         identifier = this.getIdentifier(symbol, currentScope);
 706                         //println("<B>??</B>");
 707                         if (identifier == false) {
 708
 709                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 710                                 // Here, we found an undeclared and un-namespaced symbol that is
 711                                 // 3 characters or less in length. Declare it in the global scope.
 712                                 // We don't need to declare longer symbols since they won't cause
 713                                 // any conflict with other munged symbols.
 714                                 this.globalScope.declareIdentifier(symbol, token);
 715                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 716                             } else {
 717                                 //println("undeclared")
 718                             }
 719
 720
 721                         } else {
 722                             //println("<B>++</B>");
 723                             token.identifier = identifier;
 724                             identifier.refcount++;
 725                         }
 726
 727                     }
 728                     break;
 729
 730
 731
 732
 733                     //println("<B>EID</B>");
 734                  case 'KEYW':
 735
 736                     if (token.name == "FUNCTION") {
 737
 738                         this.parseFunctionDeclaration();
 739                         break;
 740                     }
 741
 742
 743
 744                     symbol = token.data;
 745                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 746
 747                         if (symbol == "eval") {
 748                             if (this.ts.look(-1).type == 'COMM') {
 749                                 // look for eval:var:noreplace\n
 750                                 var _t = this;
 751                                 this.ts.look(-1).data.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 752                                     var hi = _t.getIdentifier(a, currentScope);
 753                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 754                                     if (hi) {
 755                                       //  println("PROTECT "+a+" from munge");
 756                                         hi.toMunge = false;
 757                                     }
 758
 759
 760                                 });
 761
 762                             } else {
 763                                 this.protectScopeFromObfuscation(currentScope);
 764                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 765                             }
 766
 767
 768                         }
 769                         break;
 770                     }
 771
 772             }
 773             if (!this.ts.nextTok()) break;
 774         }
 775         print(scopeIndent + "<< EXIT EXPRESSION");
 776         this.expN--;
 777     },
 778
 779
 780     parseCatch : function() {
 781
 782         var symbol;
 783         var token;
 784         var currentScope;
 785         var identifier;
 786
 787         //token = getToken(-1);
 788         //assert token.getType() == Token.CATCH;
 789         token = this.ts.nextTok();
 790         //assert token.getType() == Token.LP; (
 791         token = this.ts.nextTok();
 792         //assert token.getType() == Token.NAME;
 793
 794         symbol = token.data;
 795         currentScope = this.scopes[this.scopes.length-1];
 796
 797         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 798             // We must declare the exception identifier in the containing function
 799             // scope to avoid errors related to the obfuscation process. No need to
 800             // display a warning if the symbol was already declared here...
 801             currentScope.declareIdentifier(symbol, token);
 802         } else {
 803             //?? why inc the refcount?? - that should be set when building the tree???
 804             identifier = this.getIdentifier(symbol, currentScope);
 805             identifier.refcount++;
 806         }
 807
 808         token = this.ts.nextTok();
 809         //assert token.getType() == Token.RP; // )
 810     },
 811
 812     parseFunctionDeclaration : function()
 813     {
 814         //print("PARSE FUNCTION");
 815         var symbol;
 816         var token;
 817         var currentScope  = false;
 818         var fnScope = false;
 819         var identifier;
 820         var b4braceNesting = this.braceNesting + 0;
 821
 822         //this.logR("<B>PARSING FUNCTION</B>");
 823         currentScope = this.scopes[this.scopes.length-1];
 824
 825         token = this.ts.nextTok();
 826         if (token.type == "NAME") {
 827             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 828                 // Get the name of the function and declare it in the current scope.
 829                 symbol = token.data;
 830                 if (currentScope.getIdentifier(symbol) != false) {
 831                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 832                 }
 833                 currentScope.declareIdentifier(symbol,token);
 834             }
 835             token =  this.ts.nextTok();
 836         }
 837
 838         //assert token.getType() == Token.LP;
 839         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 840             fnScope = new Scope(this.braceNesting, currentScope, token.n, '');
 841
 842             //println("STORING SCOPE" + this.ts.cursor);
 843
 844             this.indexedScopes[this.ts.cursor] = fnScope;
 845
 846         } else {
 847             //qln("FETCHING SCOPE" + this.ts.cursor);
 848             fnScope = this.indexedScopes[this.ts.cursor];
 849
 850         }
 851
 852         // Parse function arguments.
 853         var argpos = 0;
 854         while (this.ts.lookTok().data != ')') { //(token = consumeToken()).getType() != Token.RP) {
 855             token = this.ts.nextTok();
 856            // print ("FUNC ARGS: " + token.toString())
 857             //assert token.getType() == Token.NAME ||
 858             //        token.getType() == Token.COMMA;
 859             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 860                 symbol = token.data;
 861                 identifier = fnScope.declareIdentifier(symbol,token);
 862                 if (symbol == "$super" && argpos == 0) {
 863                     // Exception for Prototype 1.6...
 864                     identifier.preventMunging();
 865                 }
 866                 argpos++;
 867             }
 868         }
 869
 870         token = this.ts.nextTok();
 871         //print(token.toString());
 872         // assert token.getType() == Token.LC;
 873         this.braceNesting++;
 874
 875         token = this.ts.nextTok();
 876         //print(token.toString());
 877
 878
 879         this.parseScope(fnScope);
 880         // now pop it off the stack!!!
 881
 882         this.braceNesting = b4braceNesting;
 883         //print("ENDFN -1: " + this.ts.lookTok(-1).toString());
 884         //print("ENDFN 0: " + this.ts.lookTok(0).toString());
 885         //print("ENDFN 1: " + this.ts.lookTok(1).toString());
 886     },
 887
 888     protectScopeFromObfuscation : function(scope) {
 889             //assert scope != null;
 890
 891         if (scope == this.globalScope) {
 892             // The global scope does not get obfuscated,
 893             // so we don't need to worry about it...
 894             return;
 895         }
 896
 897         // Find the highest local scope containing the specified scope.
 898         while (scope && scope.parent != this.globalScope) {
 899             scope = scope.parent;
 900         }
 901
 902         //assert scope.getParentScope() == globalScope;
 903         scope.preventMunging();
 904     },
 905
 906     getIdentifier: function(symbol, scope) {
 907         var identifier;
 908         while (scope != false) {
 909             identifier = scope.getIdentifier(symbol);
 910             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 911             if (identifier) {
 912                 return identifier;
 913             }
 914             scope = scope.parent;
 915         }
 916         return false;
 917     }
 918 };