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

   1 //<Script type="text/javascript">
   2
   3 Scope = imports.Scope.Scope;
   4 TokenStream = imports.TokenStream.TokenStream;
   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         thisScope = scope;
 227         if (thisScope) {
 228             this.scopes.push(scope);
 229         } else {
 230             thisScope = this.scopes[this.scopes.length-1]
 231         }
 232
 233         //var scopeIndent = '';
 234         //this.scopes.forEach(function() {
 235         //    scopeIndent += '   ';
 236         //});
 237         //print(">> ENTER SCOPE");
 238
 239
 240
 241
 242         token = this.ts.lookTok(1);
 243         while (token) {
 244           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 245             //this.dumpToken(token , this.scopes, this.braceNesting);
 246             //print('SCOPE:' + token.toString());
 247             //this.log(token.data);
 248             if (token.type == 'NAME') {
 249             //    print('*' + token.data);
 250             }
 251             switch(token.type + '.' + token.name) {
 252                 case "KEYW.VAR":
 253                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 254                     //print('SCOPE-VAR:' + token.toString());
 255                     var vstart = this.ts.cursor +1;
 256
 257                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 258                     while (true) {
 259                         token = this.ts.nextTok();
 260                         //!this.debug|| print( token.toString());
 261                         //print('SCOPE-VAR-VAL:' + token.toString());
 262                         if (!token) { // can return false at EOF!
 263                             break;
 264                         }
 265                         if (token.name == "VAR" || token.data == ',') { // kludge..
 266                             continue;
 267                         }
 268                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 269                         if (token.type != "NAME") {
 270                             for(var i = Math.max(this.ts.cursor-10,0); i < this.ts.cursor+1; i++) {
 271                                 print(this.ts.tokens[i].toString());
 272                             }
 273
 274                             print( "var without ident");
 275                             Seed.quit()
 276                         }
 277
 278
 279                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 280                             identifier = thisScope.getIdentifier(token.data) ;
 281
 282                             if (identifier == false) {
 283                                 thisScope.declareIdentifier(token.data, token);
 284                             } else {
 285                                 token.identifier = identifier;
 286                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 287                             }
 288                         }
 289
 290                         token = this.ts.nextTok();
 291                         !this.debug|| print(token.toString());
 292                         /*
 293                         assert token.getType() == Token.SEMI ||
 294                                 token.getType() == Token.ASSIGN ||
 295                                 token.getType() == Token.COMMA ||
 296                                 token.getType() == Token.IN;
 297                         */
 298                         if (token.name == "IN") {
 299                             break;
 300                         } else {
 301                             //var bn = this.braceNesting;
 302                             var bn = this.braceNesting;
 303                             this.parseExpression();
 304                             this.braceNesting = bn;
 305                             //this.braceNesting = bn;
 306                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 307
 308                             token = this.ts.lookTok(1);
 309                             !this.debug|| print("AFTER EXP: " + token.toString());
 310                             if (token.data == ';') {
 311                                 break;
 312                             }
 313                         }
 314                     }
 315
 316                     //print("VAR:")
 317                     //this.ts.dump(vstart , this.ts.cursor);
 318
 319                     break;
 320                 case "KEYW.FUNCTION":
 321                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 322                     //    print('SCOPE-FUNC:' + JSON.stringify(token,null,4));
 323                     //println("<i>"+token.data+"</i>");
 324                      var bn = this.braceNesting;
 325                     this.parseFunctionDeclaration();
 326                      this.braceNesting = bn;
 327                     break;
 328
 329                 case "PUNC.LEFT_CURLY": // {
 330                 case "PUNC.LEFT_PAREN": // (
 331                     //print('SCOPE-CURLY/PAREN:' + token.toString());
 332                     //println("<i>"+token.data+"</i>");
 333                     var curTS = this.ts;
 334                     if (token.props) {
 335
 336                         for (var prop in token.props) {
 337
 338
 339                           //  print('SCOPE-PROPS:' + JSON.stringify(token.props[prop],null,4));
 340                             if (token.props[prop].val[0].data == 'function') {
 341                                 // parse a function..
 342                                 this.ts = new TokenStream(token.props[prop].val);
 343                                 this.ts.nextTok();
 344                                 this.parseFunctionDeclaration();
 345
 346                                 continue;
 347                             }
 348                             // key value..
 349
 350                             this.ts = new TokenStream(token.props[prop].val);
 351                             this.parseScope(false);
 352
 353                         }
 354                         this.ts = curTS;
 355
 356                         // it's an object literal..
 357                         // the values could be replaced..
 358                         break;
 359                     }
 360
 361
 362                     var _this = this;
 363                     token.items.forEach(function(expr) {
 364                           _this.ts = new TokenStream(expr);
 365                           _this.parseExpression()
 366                     });
 367                     this.ts = curTS;
 368                     //print("NOT PROPS"); Seed.quit();
 369
 370                     //isObjectLitAr.push(false);
 371                     //this.braceNesting++;
 372
 373                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 374                     break;
 375
 376                 case "PUNC.RIGHT_CURLY": // }
 377                     //print("<< EXIT SCOPE");
 378                     return;
 379                 /*
 380                     //println("<i>"+token.data+"</i>");
 381                     this.braceNesting--;
 382                     isObjectLitAr.pop();
 383                     //print(">>>>>> OBJLIT POP"+ this.braceNesting);
 384                         //assert braceNesting >= scope.getBra ceNesting();
 385
 386                     if (this.braceNesting < expressionBraceNesting) {
 387                         var ls = this.scopes.pop();
 388                         ls.getUsedSymbols();
 389                         // eat symbol if we are currently at {
 390                         if (this.ts.look(0).data == '{') {
 391                             this.ts.nextTok();
 392                         }
 393
 394                         print("<<<<<<<EXIT SCOPE" +this.scopes.length);
 395                         return;
 396                     }
 397                     break;
 398 */
 399                 case "KEYW.WITH":
 400                     //print('SCOPE-WITH:' + token.toString());
 401                     //println("<i>"+token.data+"</i>");
 402                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 403                         // Inside a 'with' block, it is impossible to figure out
 404                         // statically whether a symbol is a local variable or an
 405                         // object member. As a consequence, the only thing we can
 406                         // do is turn the obfuscation off for the highest scope
 407                         // containing the 'with' block.
 408                         this.protectScopeFromObfuscation(thisScope);
 409                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 410                     }
 411                     break;
 412
 413                 case "KEYW.CATCH":
 414                     //print('SCOPE-CATCH:' + token.toString());
 415                     //println("<i>"+token.data+"</i>");
 416                     this.parseCatch();
 417                     break;
 418                 /*
 419                 case Token.SPECIALCOMMENT:
 420                         if (mode == BUILDING_SYMBOL_TREE) {
 421                             protectScopeFromObfuscation(scope);
 422                             this.warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression." : ""), true);
 423                         }
 424                         break;
 425                 */
 426
 427                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 428                 case "STRN.SINGLE_QUOTE":
 429                     print('SCOPE-STRING:' + token.toString());
 430                     //println("<i>"+token.data+"</i>");
 431
 432                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 433                         // then we are in an object lit.. -> we need to flag the brace as such...
 434                         isObjectLitAr.pop();
 435                         isObjectLitAr.push(true);
 436                         //print(">>>>>> OBJLIT REPUSH(true)");
 437                     }
 438                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 439
 440                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 441                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 442                         // see if we can replace..
 443                         // remove the quotes..
 444                         // should do a bit more checking!!!! (what about wierd char's in the string..
 445                         var str = token.data.substring(1,token.data.length-1);
 446                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 447                             token.outData = str;
 448                         }
 449
 450
 451
 452                     }
 453
 454
 455
 456                     break;
 457
 458                 case "NAME.NAME":
 459                     print('SCOPE-NAME:' + token.toString());
 460                     //print("DEAL WITH NAME:");
 461                     // got identifier..
 462
 463                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 464                     if ((this.ts.lookTok(-1).data == "{") && (this.ts.lookTok(1).data == ":")) {
 465                         isObjectLitAr.pop();
 466                         isObjectLitAr.push(true);
 467                         //print(">>>>>> OBJLIT REPUSH(true)");
 468                         //println("<i>"+token.data+"</i>");
 469                         break;
 470                     }
 471                    // print("DEAL WITH obj lit:");
 472                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 473
 474                     if (isInObjectLitAr && (this.ts.lookTok(1).data == ":") && (this.ts.lookTok(-1).data == ",")) {
 475                         // skip, it's an object lit key..
 476                         //println("<i>"+token.data+"</i>");
 477                         break;
 478                     }
 479
 480
 481                     // skip anyting with "." before it..!!
 482
 483                     if (this.ts.lookTok(-1).data == ".") {
 484                         // skip, it's an object prop.
 485                         //println("<i>"+token.data+"</i>");
 486                         break;
 487                     }
 488                     //print("SYMBOL: " + token.toString());
 489
 490                     symbol = token.data;
 491                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 492
 493                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 494
 495                         //print ("MUNGE?" + symbol);
 496
 497                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 498
 499                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 500                         identifier = this.getIdentifier(symbol, thisScope);
 501
 502                         if (identifier == false) {
 503 // BUG!find out where builtin is defined...
 504                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 505                                 // Here, we found an undeclared and un-namespaced symbol that is
 506                                 // 3 characters or less in length. Declare it in the global scope.
 507                                 // We don't need to declare longer symbols since they won't cause
 508                                 // any conflict with other munged symbols.
 509                                 this.globalScope.declareIdentifier(symbol, token);
 510                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 511                             }
 512
 513                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 514                         } else {
 515                             token.identifier = identifier;
 516                             identifier.refcount++;
 517                         }
 518                     }
 519
 520                     break;
 521                     //println("<B>SID</B>");
 522                 default:
 523                     if (token.type != 'KEYW') {
 524                         break;
 525                     }
 526                     print('SCOPE-KEYW:' + token.toString());
 527                    // print("Check eval:");
 528
 529                     symbol = token.data;
 530
 531                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 532
 533                         if (symbol == "eval") {
 534                             // look back one and see if we can find a comment!!!
 535                             if (this.ts.look(-1).type == "COMM") {
 536                                 // look for eval:var:noreplace\n
 537                                 var _t = this;
 538                                 this.ts.look(-1).data.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 539
 540                                     var hi = _t.getIdentifier(a, thisScope);
 541                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 542                                     if (hi) {
 543                                      //   println("PROTECT "+a+" from munge");
 544                                         hi.toMunge = false;
 545                                     }
 546
 547                                 });
 548
 549
 550                             } else {
 551
 552
 553                                 this.protectScopeFromObfuscation(thisScope);
 554                                 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);
 555                             }
 556
 557                         }
 558
 559                     }
 560                     break;
 561
 562
 563             } // end switch
 564
 565
 566             //print("parseScope TOK : " + token.toString());
 567             token = this.ts.nextTok();
 568             //if (this.ts.nextT()) break;
 569
 570         }
 571         print("<<< EXIT SCOPE");
 572         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 573     },
 574
 575     expN : 0,
 576     parseExpression : function() {
 577
 578         // Parse the expression until we encounter a comma or a semi-colon
 579         // in the same brace nesting, bracket nesting and paren nesting.
 580         // Parse functions if any...
 581         //println("<i>EXP</i><BR/>");
 582         !this.debug || print("PARSE EXPR");
 583         this.expN++;
 584
 585         // for printing stuff..
 586
 587
 588
 589         var symbol;
 590         var token;
 591         var currentScope;
 592         var identifier;
 593
 594         var expressionBraceNesting = this.braceNesting + 0;
 595         var bracketNesting = 0;
 596         var parensNesting = 0;
 597         var isInObjectLitAr;
 598         var isObjectLitAr = [ false ];
 599
 600         currentScope = this.scopes[this.scopes.length-1];
 601
 602
 603         //print(scopeIndent + ">> ENTER EXPRESSION" + this.expN);
 604         while (token = this.ts.nextTok()) {
 605
 606
 607
 608            /*
 609             // moved out of loop?
 610            currentScope = this.scopes[this.scopes.length-1];
 611
 612             var scopeIndent = '';
 613             this.scopes.forEach(function() {
 614                 scopeIndent += '   ';
 615             });
 616            */
 617
 618            //this.dumpToken(token,  this.scopes, this.braceNesting );
 619            print('EXP' +  token.toString());
 620
 621
 622             //println("<i>"+token.data+"</i>");
 623             //this.log("EXP:" + token.data);
 624             switch (token.type) {
 625                 case 'PUNC':
 626                     print("EXPR-PUNC:" + token.toString());
 627
 628                     switch(token.data) {
 629
 630                         case ';':
 631                             print("<< EXIT EXPRESSION");
 632                             break;
 633
 634                         case ',':
 635
 636                             break;
 637
 638
 639                         case '(': //Token.LP:
 640                         case '{': //Token.LC:
 641                         case '[': //Token.LB:
 642                             print('SCOPE-CURLY/PAREN/BRACE:' + token.toString());
 643                             //println("<i>"+token.data+"</i>");
 644                             var curTS = this.ts;
 645                             if (token.props) {
 646
 647                                 for (var prop in token.props) {
 648                                     if (token.props[prop].val.data == 'function') {
 649                                         // parse a function..
 650                                         this.parseFunctProp(token.props[prop]);
 651                                         continue;
 652                                     }
 653                                     // key value..
 654
 655                                     this.ts = new TokenStream(token.props[prop].val);
 656                                     this.parseScope(currentScope);
 657
 658                                 }
 659                                 this.ts = curTS;
 660
 661                                 // it's an object literal..
 662                                 // the values could be replaced..
 663                                 break;
 664                             }
 665
 666
 667                             var _this = this;
 668                             token.items.forEach(function(expr) {
 669                                   _this.ts = new TokenStream(expr);
 670                                   _this.parseExpression()
 671                             });
 672                             this.ts = curTS;
 673
 674
 675
 676                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 677                             break;
 678
 679
 680
 681
 682
 683                         case ')': //Token.RP:
 684                         case ']': //Token.RB:
 685                         case '}': //Token.RB:
 686                             print("<< EXIT EXPRESSION");
 687                             return;
 688
 689
 690
 691                             parensNesting++;
 692                             break;
 693
 694
 695
 696                     }
 697                     break;
 698
 699                 case 'STRN': // used for object lit detection..
 700                     if (this.mode == 'BUILDING_SYMBOL_TREE')
 701                         print("EXPR-STR:" + JSON.stringify(token, null, 4));
 702
 703
 704                     break;
 705
 706
 707
 708                 case 'NAME':
 709                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 710
 711                         print("EXPR-NAME:" + JSON.stringify(token, null, 4));
 712                     } else {
 713                         print("EXPR-NAME:" + token.toString());
 714                     }
 715                     symbol = token.data;
 716                     //print("in NAME = " + token.toString());
 717                     //print("in NAME 0: " + this.ts.look(0).toString());
 718                     //print("in NAME 2: " + this.ts.lookTok(2).toString());
 719
 720                     //print(this.ts.lookTok(-1).data);
 721                     // prefixed with '.'
 722                     if (this.ts.lookTok(-1).data == ".") {
 723                         //skip '.'
 724                         break;
 725                     }
 726
 727
 728                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 729
 730                         identifier = this.getIdentifier(symbol, currentScope);
 731                         //println("<B>??</B>");
 732                         if (identifier == false) {
 733
 734                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 735                                 // Here, we found an undeclared and un-namespaced symbol that is
 736                                 // 3 characters or less in length. Declare it in the global scope.
 737                                 // We don't need to declare longer symbols since they won't cause
 738                                 // any conflict with other munged symbols.
 739                                 this.globalScope.declareIdentifier(symbol, token);
 740                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 741                                 //print("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')');
 742                                 //throw "OOPS";
 743                             } else {
 744                                 print("undeclared:" + token.toString())
 745                             }
 746
 747
 748                         } else {
 749                             //println("<B>++</B>");
 750                             token.identifier = identifier;
 751                             identifier.refcount++;
 752                         }
 753
 754                     }
 755                     break;
 756
 757
 758
 759
 760                     //println("<B>EID</B>");
 761                 case 'KEYW':
 762                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 763                     //    print("EXPR-KEYW:" + JSON.stringify(token, null, 4));
 764                     if (token.name == "FUNCTION") {
 765
 766                         this.parseFunctionDeclaration();
 767                         break;
 768                     }
 769
 770
 771
 772                     symbol = token.data;
 773                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 774
 775                         if (symbol == "eval") {
 776                             if (this.ts.look(-1).type == 'COMM') {
 777                                 // look for eval:var:noreplace\n
 778                                 var _t = this;
 779                                 this.ts.look(-1).data.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 780                                     var hi = _t.getIdentifier(a, currentScope);
 781                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 782                                     if (hi) {
 783                                       //  println("PROTECT "+a+" from munge");
 784                                         hi.toMunge = false;
 785                                     }
 786
 787
 788                                 });
 789
 790                             } else {
 791                                 this.protectScopeFromObfuscation(currentScope);
 792                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 793                             }
 794
 795
 796                         }
 797                         break;
 798                     }
 799                 default:
 800                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 801                     //    print("EXPR-SKIP:" + JSON.stringify(token, null, 4));
 802                     break;
 803             }
 804
 805         }
 806         //print("<< EXIT EXPRESSION");
 807         this.expN--;
 808     },
 809
 810
 811     parseCatch : function() {
 812
 813         var symbol;
 814         var token;
 815         var currentScope;
 816         var identifier;
 817
 818         //token = getToken(-1);
 819         //assert token.getType() == Token.CATCH;
 820         token = this.ts.nextTok();
 821         //assert token.getType() == Token.LP; (
 822         //token = this.ts.nextTok();
 823         //assert token.getType() == Token.NAME;
 824
 825         symbol = token.items[0].data;
 826         currentScope = this.scopes[this.scopes.length-1];
 827
 828         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 829             // We must declare the exception identifier in the containing function
 830             // scope to avoid errors related to the obfuscation process. No need to
 831             // display a warning if the symbol was already declared here...
 832             currentScope.declareIdentifier(symbol, token);
 833         } else {
 834             //?? why inc the refcount?? - that should be set when building the tree???
 835             identifier = this.getIdentifier(symbol, currentScope);
 836             identifier.refcount++;
 837         }
 838
 839         token = this.ts.nextTok();
 840         //assert token.getType() == Token.RP; // )
 841     },
 842
 843     parseFunctionDeclaration : function()
 844     {
 845         //print("PARSE FUNCTION");
 846         var symbol;
 847         var token;
 848         var currentScope  = false;
 849         var fnScope = false;
 850         var identifier;
 851         var b4braceNesting = this.braceNesting + 0;
 852
 853         //this.logR("<B>PARSING FUNCTION</B>");
 854         currentScope = this.scopes[this.scopes.length-1];
 855
 856         token = this.ts.nextTok();
 857         if (token.type == "NAME") {
 858             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 859                 // Get the name of the function and declare it in the current scope.
 860                 symbol = token.data;
 861                 if (currentScope.getIdentifier(symbol) != false) {
 862                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 863                 }
 864                 currentScope.declareIdentifier(symbol,token);
 865             }
 866             token =  this.ts.nextTok();
 867         }
 868
 869         //assert token.getType() == Token.LP;
 870         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 871             fnScope = new Scope(this.braceNesting, currentScope, token.n, '');
 872
 873             //println("STORING SCOPE" + this.ts.cursor);
 874
 875             this.indexedScopes[token.id] = fnScope;
 876
 877         } else {
 878             //qln("FETCHING SCOPE" + this.ts.cursor);
 879             fnScope = this.indexedScopes[token.id];
 880
 881         }
 882         //if (this.mode == 'BUILDING_SYMBOL_TREE')
 883         //    print('FUNC-PARSE:' + JSON.stringify(token,null,4));
 884         // Parse function arguments.
 885         var args = token.items;
 886         for (var argpos =0; argpos < args.length; argpos++) {
 887
 888             token = args[argpos][0];
 889             //print ("FUNC ARGS: " + token.toString())
 890             //assert token.getType() == Token.NAME ||
 891             //        token.getType() == Token.COMMA;
 892             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 893                 symbol = token.data;
 894                 identifier = fnScope.declareIdentifier(symbol,token);
 895                 if (symbol == "$super" && argpos == 0) {
 896                     // Exception for Prototype 1.6...
 897                     identifier.preventMunging();
 898                 }
 899                 //argpos++;
 900             }
 901         }
 902
 903         token = this.ts.nextTok();
 904         //print('FUNC-BODY:' + JSON.stringify(token.items,null,4));
 905         //Seed.quit();
 906         //print(token.toString());
 907         // assert token.getType() == Token.LC;
 908         //this.braceNesting++;
 909
 910         //token = this.ts.nextTok();
 911         //print(token.toString());
 912         var outTS = this.ts;
 913         var _this = this;
 914         token.items.forEach(function(tar) {
 915             _this.ts = new TokenStream(tar);
 916             _this.parseScope(fnScope);
 917
 918         });
 919
 920         //print(JSON.stringify(this.ts,null,4));
 921         //this.parseScope(fnScope);
 922         this.ts = outTS;
 923         // now pop it off the stack!!!
 924
 925         //this.braceNesting = b4braceNesting;
 926         //print("ENDFN -1: " + this.ts.lookTok(-1).toString());
 927         //print("ENDFN 0: " + this.ts.lookTok(0).toString());
 928         //print("ENDFN 1: " + this.ts.lookTok(1).toString());
 929     },
 930
 931     protectScopeFromObfuscation : function(scope) {
 932             //assert scope != null;
 933
 934         if (scope == this.globalScope) {
 935             // The global scope does not get obfuscated,
 936             // so we don't need to worry about it...
 937             return;
 938         }
 939
 940         // Find the highest local scope containing the specified scope.
 941         while (scope && scope.parent != this.globalScope) {
 942             scope = scope.parent;
 943         }
 944
 945         //assert scope.getParentScope() == globalScope;
 946         scope.preventMunging();
 947     },
 948
 949     getIdentifier: function(symbol, scope) {
 950         var identifier;
 951         while (scope != false) {
 952             identifier = scope.getIdentifier(symbol);
 953             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 954             if (identifier) {
 955                 return identifier;
 956             }
 957             scope = scope.parent;
 958         }
 959         return false;
 960     }
 961 };