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         //print(JSON.stringify(this.ts.tokens, null,4));
 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 && thisScope.gid != this.scopes[this.scopes.length-1]) {
 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:' + JSON.stringify(token, null, 4));
 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,token) ;
 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                             var nts = [];
 304                             while (true) {
 305                                 if (!token || token.type == 'VOID' || token.data == ',') {
 306                                     break;
 307                                 }
 308                                 nts.push(token);
 309                                 token = this.ts.nextTok();
 310                             }
 311                             if (nts.length) {
 312                                 var TS = this.ts;
 313                                 this.ts = new TokenStream(nts);
 314                                 this.parseExpression();
 315                                 this.ts = TS;
 316                             }
 317
 318                             this.braceNesting = bn;
 319                             //this.braceNesting = bn;
 320                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 321
 322                             token = this.ts.lookTok(1);
 323                             !this.debug|| print("AFTER EXP: " + token.toString());
 324                             if (token.data == ';') {
 325                                 break;
 326                             }
 327                         }
 328                     }
 329
 330                     //print("VAR:")
 331                     //this.ts.dump(vstart , this.ts.cursor);
 332
 333                     break;
 334                 case "KEYW.FUNCTION":
 335                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 336                     //    print('SCOPE-FUNC:' + JSON.stringify(token,null,4));
 337                     //println("<i>"+token.data+"</i>");
 338                      var bn = this.braceNesting;
 339                     this.parseFunctionDeclaration();
 340                      this.braceNesting = bn;
 341                     break;
 342
 343                 case "PUNC.LEFT_CURLY": // {
 344                 case "PUNC.LEFT_PAREN": // (
 345                 case "PUNC.LEFT_BRACE": // [
 346                     //print('SCOPE-CURLY/PAREN:' + token.toString());
 347                     //println("<i>"+token.data+"</i>");
 348                     var curTS = this.ts;
 349                     if (token.props) {
 350
 351                         for (var prop in token.props) {
 352
 353
 354                           //  print('SCOPE-PROPS:' + JSON.stringify(token.props[prop],null,4));
 355                             if (token.props[prop].val[0].data == 'function') {
 356                                 // parse a function..
 357                                 this.ts = new TokenStream(token.props[prop].val);
 358                                 this.ts.nextTok();
 359                                 this.parseFunctionDeclaration();
 360
 361                                 continue;
 362                             }
 363                             // key value..
 364
 365                             this.ts = new TokenStream(token.props[prop].val);
 366                             this.parseExpression();
 367
 368                         }
 369                         this.ts = curTS;
 370
 371                         // it's an object literal..
 372                         // the values could be replaced..
 373                         break;
 374                     }
 375
 376
 377                     var _this = this;
 378                     token.items.forEach(function(expr) {
 379                           _this.ts = new TokenStream(expr);
 380                           _this.parseExpression()
 381                     });
 382                     this.ts = curTS;
 383                     //print("NOT PROPS"); Seed.quit();
 384
 385                     //isObjectLitAr.push(false);
 386                     //this.braceNesting++;
 387
 388                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 389                     break;
 390
 391                 case "PUNC.RIGHT_CURLY": // }
 392                     //print("<< EXIT SCOPE");
 393                     return;
 394                 /*
 395                     //println("<i>"+token.data+"</i>");
 396                     this.braceNesting--;
 397                     isObjectLitAr.pop();
 398                     //print(">>>>>> OBJLIT POP"+ this.braceNesting);
 399                         //assert braceNesting >= scope.getBra ceNesting();
 400
 401                     if (this.braceNesting < expressionBraceNesting) {
 402                         var ls = this.scopes.pop();
 403                         ls.getUsedSymbols();
 404                         // eat symbol if we are currently at {
 405                         if (this.ts.look(0).data == '{') {
 406                             this.ts.nextTok();
 407                         }
 408
 409                         print("<<<<<<<EXIT SCOPE" +this.scopes.length);
 410                         return;
 411                     }
 412                     break;
 413 */
 414                 case "KEYW.WITH":
 415                     //print('SCOPE-WITH:' + token.toString());
 416                     //println("<i>"+token.data+"</i>");
 417                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 418                         // Inside a 'with' block, it is impossible to figure out
 419                         // statically whether a symbol is a local variable or an
 420                         // object member. As a consequence, the only thing we can
 421                         // do is turn the obfuscation off for the highest scope
 422                         // containing the 'with' block.
 423                         this.protectScopeFromObfuscation(thisScope);
 424                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 425                     }
 426                     break;
 427
 428                 case "KEYW.CATCH":
 429                     //print('SCOPE-CATCH:' + token.toString());
 430                     //println("<i>"+token.data+"</i>");
 431                     this.parseCatch();
 432                     break;
 433                 /*
 434                 case Token.SPECIALCOMMENT:
 435                         if (mode == BUILDING_SYMBOL_TREE) {
 436                             protectScopeFromObfuscation(scope);
 437                             this.warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression." : ""), true);
 438                         }
 439                         break;
 440                 */
 441
 442                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 443                 case "STRN.SINGLE_QUOTE":
 444                   //  print('SCOPE-STRING:' + token.toString());
 445                     //println("<i>"+token.data+"</i>");
 446
 447                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 448                         // then we are in an object lit.. -> we need to flag the brace as such...
 449                         isObjectLitAr.pop();
 450                         isObjectLitAr.push(true);
 451                         //print(">>>>>> OBJLIT REPUSH(true)");
 452                     }
 453                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 454
 455                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 456                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 457                         // see if we can replace..
 458                         // remove the quotes..
 459                         // should do a bit more checking!!!! (what about wierd char's in the string..
 460                         var str = token.data.substring(1,token.data.length-1);
 461                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 462                             token.outData = str;
 463                         }
 464
 465
 466
 467                     }
 468
 469
 470
 471                     break;
 472
 473                 case "NAME.NAME":
 474                     //print('SCOPE-NAME:' + token.toString());
 475                     //print("DEAL WITH NAME:");
 476                     // got identifier..
 477
 478                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 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 (symbol == 'this') {
 492                         break;
 493                     }
 494                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 495
 496                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 497
 498                         //print ("MUNGE?" + symbol);
 499
 500                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 501
 502                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 503                         identifier = this.getIdentifier(symbol, thisScope, token);
 504
 505                         if (identifier == false) {
 506 // BUG!find out where builtin is defined...
 507                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 508                                 // Here, we found an undeclared and un-namespaced symbol that is
 509                                 // 3 characters or less in length. Declare it in the global scope.
 510                                 // We don't need to declare longer symbols since they won't cause
 511                                 // any conflict with other munged symbols.
 512                                 this.globalScope.declareIdentifier(symbol, token);
 513                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 514                             }
 515
 516                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 517                         } else {
 518                             token.identifier = identifier;
 519                             identifier.refcount++;
 520                         }
 521                     }
 522
 523                     break;
 524                     //println("<B>SID</B>");
 525                 default:
 526                     if (token.type != 'KEYW') {
 527                         break;
 528                     }
 529                    print('SCOPE-KEYW:' + token.toString());
 530                    // print("Check eval:");
 531
 532                     symbol = token.data;
 533
 534                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 535
 536                         if (symbol == "eval") {
 537                             // look back one and see if we can find a comment!!!
 538                             //if (this.ts.look(-1).type == "COMM") {
 539                             if (token.prefix && token.prefix.match('/eval/')) {
 540                                 // look for eval:var:noreplace\n
 541                                 var _t = this;
 542                                 token.prefix.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 543
 544                                     var hi = _t.getIdentifier(a, thisScope, token);
 545                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 546                                     if (hi) {
 547                                      //   println("PROTECT "+a+" from munge");
 548                                         hi.toMunge = false;
 549                                     }
 550
 551                                 });
 552
 553
 554                             } else {
 555
 556
 557                                 this.protectScopeFromObfuscation(thisScope);
 558                                 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);
 559                             }
 560
 561                         }
 562
 563                     }
 564                     break;
 565
 566
 567             } // end switch
 568
 569
 570             //print("parseScope TOK : " + token.toString());
 571             token = this.ts.nextTok();
 572             //if (this.ts.nextT()) break;
 573
 574         }
 575         //print("<<< EXIT SCOPE");
 576         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 577     },
 578
 579     expN : 0,
 580     parseExpression : function() {
 581
 582         // Parse the expression until we encounter a comma or a semi-colon
 583         // in the same brace nesting, bracket nesting and paren nesting.
 584         // Parse functions if any...
 585         //println("<i>EXP</i><BR/>");
 586         !this.debug || print("PARSE EXPR");
 587         this.expN++;
 588
 589         // for printing stuff..
 590
 591
 592
 593         var symbol;
 594         var token;
 595         var currentScope;
 596         var identifier;
 597
 598         var expressionBraceNesting = this.braceNesting + 0;
 599         var bracketNesting = 0;
 600         var parensNesting = 0;
 601         var isInObjectLitAr;
 602         var isObjectLitAr = [ false ];
 603
 604         currentScope = this.scopes[this.scopes.length-1];
 605
 606
 607         //print(scopeIndent + ">> ENTER EXPRESSION" + this.expN);
 608         while (token = this.ts.nextTok()) {
 609
 610
 611
 612            /*
 613             // moved out of loop?
 614            currentScope = this.scopes[this.scopes.length-1];
 615
 616             var scopeIndent = '';
 617             this.scopes.forEach(function() {
 618                 scopeIndent += '   ';
 619             });
 620            */
 621
 622            //this.dumpToken(token,  this.scopes, this.braceNesting );
 623            //print('EXPR' +  token.toString());
 624
 625
 626             //println("<i>"+token.data+"</i>");
 627             //this.log("EXP:" + token.data);
 628             switch (token.type) {
 629                 case 'PUNC':
 630                     //print("EXPR-PUNC:" + token.toString());
 631
 632                     switch(token.data) {
 633
 634                         case ';':
 635                             //print("<< EXIT EXPRESSION");
 636                             break;
 637
 638                         case ',':
 639
 640                             break;
 641
 642
 643                         case '(': //Token.LP:
 644                         case '{': //Token.LC:
 645                         case '[': //Token.LB:
 646                             //print('SCOPE-CURLY/PAREN/BRACE:' + token.toString());
 647                            // print('SCOPE-CURLY/PAREN/BRACE:' + JSON.stringify(token, null,4));
 648                             //println("<i>"+token.data+"</i>");
 649                             var curTS = this.ts;
 650                             if (token.props) {
 651
 652                                 for (var prop in token.props) {
 653                                     if (token.props[prop].val[0].data == 'function') {
 654                                         // parse a function..
 655                                         this.ts = new TokenStream(token.props[prop].val);
 656                                         this.ts.nextTok();
 657                                         this.parseFunctionDeclaration();
 658                                         continue;
 659                                     }
 660                                     // key value..
 661
 662                                     this.ts = new TokenStream(token.props[prop].val);
 663                                     this.parseExpression();
 664
 665                                 }
 666                                 this.ts = curTS;
 667
 668                                 // it's an object literal..
 669                                 // the values could be replaced..
 670                                 break;
 671                             }
 672
 673
 674                             var _this = this;
 675                             token.items.forEach(function(expr) {
 676                                   _this.ts = new TokenStream(expr);
 677                                   _this.parseExpression()
 678                             });
 679                             this.ts = curTS;
 680
 681
 682
 683                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 684                             break;
 685
 686
 687
 688
 689
 690                         case ')': //Token.RP:
 691                         case ']': //Token.RB:
 692                         case '}': //Token.RB:
 693                             //print("<< EXIT EXPRESSION");
 694                             return;
 695
 696
 697
 698                             parensNesting++;
 699                             break;
 700
 701
 702
 703                     }
 704                     break;
 705
 706                 case 'STRN': // used for object lit detection..
 707                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 708                         //print("EXPR-STR:" + JSON.stringify(token, null, 4));
 709
 710
 711                     break;
 712
 713
 714
 715                 case 'NAME':
 716                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 717
 718                         //print("EXPR-NAME:" + JSON.stringify(token, null, 4));
 719                     } else {
 720                         //print("EXPR-NAME:" + token.toString());
 721                     }
 722                     symbol = token.data;
 723                     //print("in NAME = " + token.toString());
 724                     //print("in NAME 0: " + this.ts.look(0).toString());
 725                     //print("in NAME 2: " + this.ts.lookTok(2).toString());
 726
 727                     //print(this.ts.lookTok(-1).data);
 728                     // prefixed with '.'
 729                     if (this.ts.lookTok(-1).data == ".") {
 730                         //skip '.'
 731                         break;
 732                     }
 733                     if (symbol == 'this') {
 734                         break;
 735                        }
 736
 737                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 738
 739                         identifier = this.getIdentifier(symbol, currentScope, token);
 740                         //println("<B>??</B>");
 741                         if (identifier == false) {
 742
 743                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 744                                 // Here, we found an undeclared and un-namespaced symbol that is
 745                                 // 3 characters or less in length. Declare it in the global scope.
 746                                 // We don't need to declare longer symbols since they won't cause
 747                                 // any conflict with other munged symbols.
 748                                 this.globalScope.declareIdentifier(symbol, token);
 749                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 750                                 //print("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')');
 751                                 //throw "OOPS";
 752                             } else {
 753                                 //print("undeclared:" + token.toString())
 754                             }
 755
 756
 757                         } else {
 758                             //println("<B>++</B>");
 759                             token.identifier = identifier;
 760                             identifier.refcount++;
 761                         }
 762
 763                     }
 764                     break;
 765
 766
 767
 768
 769                     //println("<B>EID</B>");
 770                 case 'KEYW':
 771                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 772                     //    print("EXPR-KEYW:" + JSON.stringify(token, null, 4));
 773
 774                     print('EXPR-KEYW:' + token.toString());
 775                     if (token.name == "FUNCTION") {
 776
 777                         this.parseFunctionDeclaration();
 778                         break;
 779                     }
 780
 781
 782
 783                     symbol = token.data;
 784                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 785
 786                         if (token.name == "EVAL") {
 787                             print(JSON.stringify(token,null,4));
 788                             if (token.prefix && token.prefix.match('/eval/')) {
 789                                 // look for eval:var:noreplace\n
 790                                 var _t = this;
 791                                 token.prefix.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 792                                     var hi = _t.getIdentifier(a, currentScope, token);
 793                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 794                                     if (hi) {
 795                                       //  println("PROTECT "+a+" from munge");
 796                                         hi.toMunge = false;
 797                                     }
 798
 799
 800                                 });
 801
 802                             } else {
 803                                 this.protectScopeFromObfuscation(currentScope);
 804                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 805                             }
 806
 807
 808                         }
 809                         break;
 810                     }
 811                 default:
 812                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 813                     //    print("EXPR-SKIP:" + JSON.stringify(token, null, 4));
 814                     break;
 815             }
 816
 817         }
 818         //print("<< EXIT EXPRESSION");
 819         this.expN--;
 820     },
 821
 822
 823     parseCatch : function() {
 824
 825         var symbol;
 826         var token;
 827         var currentScope;
 828         var identifier;
 829
 830         //token = getToken(-1);
 831         //assert token.getType() == Token.CATCH;
 832         token = this.ts.nextTok();
 833
 834         //print(JSON.stringify(token,null,4));
 835         //assert token.getType() == Token.LP; (
 836         //token = this.ts.nextTok();
 837         //assert token.getType() == Token.NAME;
 838
 839         symbol = token.items[0][0].data;
 840         currentScope = this.scopes[this.scopes.length-1];
 841
 842         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 843             // We must declare the exception identifier in the containing function
 844             // scope to avoid errors related to the obfuscation process. No need to
 845             // display a warning if the symbol was already declared here...
 846             currentScope.declareIdentifier(symbol, token.items[0][0]);
 847         } else {
 848             //?? why inc the refcount?? - that should be set when building the tree???
 849             identifier = this.getIdentifier(symbol, currentScope, token.items[0][0]);
 850             identifier.refcount++;
 851         }
 852
 853         token = this.ts.nextTok();
 854         //assert token.getType() == Token.RP; // )
 855     },
 856
 857     parseFunctionDeclaration : function()
 858     {
 859         //print("PARSE FUNCTION");
 860         var symbol;
 861         var token;
 862         var currentScope  = false;
 863         var fnScope = false;
 864         var identifier;
 865         var b4braceNesting = this.braceNesting + 0;
 866
 867         //this.logR("<B>PARSING FUNCTION</B>");
 868         currentScope = this.scopes[this.scopes.length-1];
 869
 870         token = this.ts.nextTok();
 871         if (token.type == "NAME") {
 872             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 873                 // Get the name of the function and declare it in the current scope.
 874                 symbol = token.data;
 875                 if (currentScope.getIdentifier(symbol,token) != false) {
 876                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 877                 }
 878                 currentScope.declareIdentifier(symbol,token);
 879             }
 880             token =  this.ts.nextTok();
 881         }
 882
 883
 884         // return function() {....
 885         while (token.data != "(") {
 886             print(token.toString());
 887             token =  this.ts.nextTok();
 888
 889
 890
 891         }
 892
 893
 894         //assert token.getType() == Token.LP;
 895         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 896             fnScope = new Scope(1, currentScope, token.n, '', token);
 897
 898             //println("STORING SCOPE" + this.ts.cursor);
 899
 900             this.indexedScopes[token.id] = fnScope;
 901
 902         } else {
 903             //qln("FETCHING SCOPE" + this.ts.cursor);
 904             fnScope = this.indexedScopes[token.id];
 905         }
 906         //if (this.mode == 'BUILDING_SYMBOL_TREE')
 907         //  print('FUNC-PARSE:' + JSON.stringify(token,null,4));
 908         // Parse function arguments.
 909         var args = token.items;
 910         for (var argpos =0; argpos < args.length; argpos++) {
 911
 912             token = args[argpos][0];
 913             //print ("FUNC ARGS: " + token.toString())
 914             //assert token.getType() == Token.NAME ||
 915             //        token.getType() == Token.COMMA;
 916             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 917                 symbol = token.data;
 918                 identifier = fnScope.declareIdentifier(symbol,token);
 919                 if (symbol == "$super" && argpos == 0) {
 920                     // Exception for Prototype 1.6...
 921                     identifier.preventMunging();
 922                 }
 923                 //argpos++;
 924             }
 925         }
 926
 927         token = this.ts.nextTok();
 928         //print('FUNC-BODY:' + JSON.stringify(token.items,null,4));
 929         //Seed.quit();
 930         //print(token.toString());
 931         // assert token.getType() == Token.LC;
 932         //this.braceNesting++;
 933
 934         //token = this.ts.nextTok();
 935         //print(token.toString());
 936         var outTS = this.ts;
 937         var _this = this;
 938         token.items.forEach(function(tar) {
 939             _this.ts = new TokenStream(tar);
 940             _this.parseScope(fnScope);
 941
 942
 943         });
 944
 945         //print(JSON.stringify(this.ts,null,4));
 946         //this.parseScope(fnScope);
 947         this.ts = outTS;
 948         // now pop it off the stack!!!
 949
 950         //this.braceNesting = b4braceNesting;
 951         //print("ENDFN -1: " + this.ts.lookTok(-1).toString());
 952         //print("ENDFN 0: " + this.ts.lookTok(0).toString());
 953         //print("ENDFN 1: " + this.ts.lookTok(1).toString());
 954     },
 955
 956     protectScopeFromObfuscation : function(scope) {
 957             //assert scope != null;
 958
 959         if (scope == this.globalScope) {
 960             // The global scope does not get obfuscated,
 961             // so we don't need to worry about it...
 962             return;
 963         }
 964
 965         // Find the highest local scope containing the specified scope.
 966         while (scope && scope.parent != this.globalScope) {
 967             scope = scope.parent;
 968         }
 969
 970         //assert scope.getParentScope() == globalScope;
 971         scope.preventMunging();
 972     },
 973
 974     getIdentifier: function(symbol, scope, token) {
 975         var identifier;
 976         while (scope != false) {
 977             identifier = scope.getIdentifier(symbol, token);
 978             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 979             if (identifier) {
 980                 return identifier;
 981             }
 982             scope = scope.parent;
 983         }
 984         return false;
 985     }
 986 };