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

   1
   2
   3
   4 namespace JSDOC {
   5
   6         public class ScopeParser : Object {
   7
   8
   9         Gee.ArrayList<string> warnings;
  10
  11         bool debug = false;
  12         string[] idents;
  13
  14         public ScopeParser(TokenStream ts) {
  15                 this.ts = ts; // {TokenStream}
  16                 this.warnings = new Gee.ArrayList<string>();
  17                 //this.indexedg = {};
  18                 //this.timer = new Date() * 1;
  19                 this.idents = {
  20
  21                         "break",
  22                     "case",
  23                     "continue",
  24                     "default",
  25                     "delete",
  26                     "do",
  27                         "else",
  28                         "export",
  29                         "false",
  30                         "for",
  31                         "function",
  32                         "if",
  33                         "import",
  34                         "in",
  35                         "new",
  36                         "null",
  37                         "return",
  38                         "switch",
  39                         "this",
  40                         "true",
  41                         "typeof",
  42                         "var",
  43                         "void",
  44                         "while",
  45                         "with",
  46
  47                         "catch",
  48                         "class",
  49                         "const",
  50                         "debugger",
  51                         "enum",
  52                         "extends",
  53                         "finally",
  54                         "super",
  55                     "throw",
  56                     "try",
  57
  58                     "abstract",
  59                     "boolean",
  60                     "byte",
  61                     "char",
  62                     "double",
  63                     "final",
  64                     "float",
  65                     "goto",
  66                     "implements",
  67                     "instanceof",
  68                     "int",
  69                     "interface",
  70                     "long",
  71                     "native",
  72                     "package",
  73                     "private",
  74                     "protected",
  75                     "public",
  76                     "short",
  77                     "static",
  78                     "synchronized",
  79                     "throws",
  80                     "transient",
  81                         "include",
  82                         "undefined"
  83                 };
  84         }
  85
  86
  87
  88
  89     void warn(string s)
  90     {
  91         //print('****************' + s);
  92         this.warnings.add(s);
  93         //println("WARNING:" + htmlescape(s) + "<BR>");
  94     }
  95
  96
  97     // defaults should not be initialized here =- otherwise they get duped on new, rather than initalized..
  98
  99     ts : false,
 100     global : false,
 101     mode : "", //"BUILDING_SYMBOL_TREE",
 102     braceNesting : 0,
 103     indexedScopes : false,
 104     munge: true,
 105
 106
 107
 108
 109
 110     buildSymbolTree : function()
 111     {
 112         //println("<PRE>");
 113
 114         this.ts.rewind();
 115         this.braceNesting = 0;
 116
 117        // print(JSON.stringify(this.ts.tokens, null,4));
 118
 119
 120         this.globalScope = new  Scope(-1, false, -1, '');
 121         this.indexedScopes = { 0 : this.globalScope };
 122
 123         this.mode = 'BUILDING_SYMBOL_TREE';
 124         this.parseScope(this.globalScope);
 125
 126         //print("---------------END PASS 1 ---------------- ");
 127
 128     },
 129     mungeSymboltree : function()
 130     {
 131
 132         if (!this.munge) {
 133             return;
 134         }
 135
 136         // One problem with obfuscation resides in the use of undeclared
 137         // and un-namespaced global symbols that are 3 characters or less
 138         // in length. Here is an example:
 139         //
 140         //     var declaredGlobalVar;
 141         //
 142         //     function declaredGlobalFn() {
 143         //         var localvar;
 144         //         localvar = abc; // abc is an undeclared global symbol
 145         //     }
 146         //
 147         // In the example above, there is a slim chance that localvar may be
 148         // munged to 'abc', conflicting with the undeclared global symbol
 149         // abc, creating a potential bug. The following code detects such
 150         // global symbols. This must be done AFTER the entire file has been
 151         // parsed, and BEFORE munging the symbol tree. Note that declaring
 152         // extra symbols in the global scope won't hurt.
 153         //
 154         // Note: Since we go through all the tokens to do this, we also use
 155         // the opportunity to count how many times each identifier is used.
 156
 157         this.ts.rewind();
 158         this.braceNesting = 0;
 159         this.mode = 'PASS2_SYMBOL_TREE';
 160
 161         //println("MUNGING?");
 162
 163         this.parseScope(this.globalScope);
 164
 165         //this.globalScope.dump();
 166
 167
 168         this.globalScope.munge();
 169     },
 170
 171
 172     log : function(str)
 173     {
 174         print ("                    ".substring(0, this.braceNesting*2) + str);
 175
 176         //println("<B>LOG:</B>" + htmlescape(str) + "<BR/>\n");
 177     },
 178     logR : function(str)
 179     {
 180             //println("<B>LOG:</B>" + str + "<BR/>");
 181     },
 182
 183
 184
 185
 186
 187     parseScope : function(scope) // parse a token stream..
 188     {
 189         //this.timerPrint("parseScope EnterScope");
 190         //this.log(">>> ENTER SCOPE" + this.scopes.length);
 191         var symbol;
 192         var token;
 193
 194         var identifier;
 195
 196         var expressionBraceNesting = this.braceNesting + 0;
 197
 198         var parensNesting = 0;
 199
 200         var isObjectLitAr = [ false ];
 201         var isInObjectLitAr;
 202
 203
 204         //var scopeIndent = '';
 205         //this.scopes.forEach(function() {
 206         //    scopeIndent += '   ';
 207         //});
 208         //print(">> ENTER SCOPE");
 209
 210
 211
 212
 213         token = this.ts.lookTok(1);
 214         while (token) {
 215           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 216             //this.dumpToken(token , this.scopes, this.braceNesting);
 217             //print('SCOPE:' + token.toString());
 218             //this.log(token.data);
 219             //if (token.type == 'NAME') {
 220             //    print('*' + token.data);
 221             //}
 222             switch(token.type + '.' + token.name) {
 223                 case "KEYW.VAR":
 224                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 225                     //print('SCOPE-VAR:' + token.toString());
 226                     var vstart = this.ts.cursor +1;
 227
 228                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 229                     while (true) {
 230                         token = this.ts.nextTok();
 231                         //!this.debug|| print( token.toString());
 232                        // print('SCOPE-VAR-VAL:' + JSON.stringify(token, null, 4));
 233                         if (!token) { // can return false at EOF!
 234                             break;
 235                         }
 236                         if (token.name == "VAR" || token.data == ',') { // kludge..
 237                             continue;
 238                         }
 239                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 240                         if (token.type != "NAME") {
 241                             for(var i = Math.max(this.ts.cursor-10,0); i < this.ts.cursor+1; i++) {
 242                                 print(this.ts.tokens[i].toString());
 243                             }
 244
 245                             print( "var without ident");
 246                             Seed.quit()
 247                         }
 248
 249
 250                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 251                             identifier = scope.getIdentifier(token.data,token) ;
 252
 253                             if (identifier == false) {
 254                                 scope.declareIdentifier(token.data, token);
 255                             } else {
 256                                 token.identifier = identifier;
 257                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 258                             }
 259                         }
 260
 261                         token = this.ts.nextTok();
 262                         !this.debug|| print(token.toString());
 263                         /*
 264                         assert token.getType() == Token.SEMI ||
 265                                 token.getType() == Token.ASSIGN ||
 266                                 token.getType() == Token.COMMA ||
 267                                 token.getType() == Token.IN;
 268                         */
 269                         if (token.name == "IN") {
 270                             break;
 271                         } else {
 272                             //var bn = this.braceNesting;
 273                             var bn = this.braceNesting;
 274                             var nts = [];
 275                             while (true) {
 276                                 if (!token || token.type == 'VOID' || token.data == ',') {
 277                                     break;
 278                                 }
 279                                 nts.push(token);
 280                                 token = this.ts.nextTok();
 281                             }
 282                             if (nts.length) {
 283                                 var TS = this.ts;
 284                                 this.ts = new TokenStream(nts);
 285                                 this.parseExpression(scope);
 286                                 this.ts = TS;
 287                             }
 288
 289                             this.braceNesting = bn;
 290                             //this.braceNesting = bn;
 291                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 292
 293                             token = this.ts.lookTok(1);
 294                             //!this.debug||
 295                            // print("AFTER EXP: " + token.toString());
 296                             if (token.data == ';') {
 297                                 break;
 298                             }
 299                         }
 300                     }
 301
 302                     //print("VAR:")
 303                     //this.ts.dump(vstart , this.ts.cursor);
 304
 305                     break;
 306
 307
 308                 case "KEYW.FUNCTION":
 309                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 310                     //    print('SCOPE-FUNC:' + JSON.stringify(token,null,4));
 311                     //println("<i>"+token.data+"</i>");
 312                      var bn = this.braceNesting;
 313                     this.parseFunctionDeclaration(scope);
 314                      this.braceNesting = bn;
 315                     break;
 316
 317                 case "PUNC.LEFT_CURLY": // {
 318                 case "PUNC.LEFT_PAREN": // (
 319                 case "PUNC.LEFT_BRACE": // [
 320                     //print('SCOPE-CURLY/PAREN:' + token.toString());
 321                     //println("<i>"+token.data+"</i>");
 322                     var curTS = this.ts;
 323                     if (token.props) {
 324
 325                         // { a : ... , c : .... }
 326
 327                         for (var prop in token.props) {
 328
 329
 330                           //  print('SCOPE-PROPS:' + JSON.stringify(token.props[prop],null,4));
 331                             if (token.props[prop].val[0].data == 'function') {
 332                                 // parse a function..
 333                                 this.ts = new TokenStream(token.props[prop].val);
 334                                 this.ts.nextTok();
 335                                 this.parseFunctionDeclaration(scope);
 336
 337                                 continue;
 338                             }
 339                             // key value..
 340
 341                             this.ts = new TokenStream(token.props[prop].val);
 342                             this.parseExpression(scope);
 343
 344                         }
 345                         this.ts = curTS;
 346
 347                         // it's an object literal..
 348                         // the values could be replaced..
 349                         break;
 350                     }
 351
 352                     // ( ... ) or { .... } not object literals..
 353
 354                     var _this = this;
 355                     for (var xx =0; xx < token.items.length; xx++) {
 356                                 expr = token.items[xx];
 357                     //token.items.forEach(function(expr) {
 358                             //print(expr.toString());
 359                            _this.ts = new TokenStream(expr);
 360                             //if (curTS.data == '(') {
 361                                 _this.parseScope(scope)
 362                             //} else {
 363                               //  _this.parseExpression(scope)
 364                             //}
 365
 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                 case "KEYW.WITH":
 381                     //print('SCOPE-WITH:' + token.toString());
 382                     //println("<i>"+token.data+"</i>");
 383                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 384                         // Inside a 'with' block, it is impossible to figure out
 385                         // statically whether a symbol is a local variable or an
 386                         // object member. As a consequence, the only thing we can
 387                         // do is turn the obfuscation off for the highest scope
 388                         // containing the 'with' block.
 389                         this.protectScopeFromObfuscation(scope);
 390                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 391                     }
 392                     break;
 393
 394                 case "KEYW.CATCH":
 395                     //print('SCOPE-CATCH:' + token.toString());
 396                     //println("<i>"+token.data+"</i>");
 397                     this.parseCatch(scope);
 398                     break;
 399
 400                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 401                 case "STRN.SINGLE_QUOTE":
 402                   //  print('SCOPE-STRING:' + token.toString());
 403                     //println("<i>"+token.data+"</i>");
 404
 405                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 406                         // then we are in an object lit.. -> we need to flag the brace as such...
 407                         isObjectLitAr.pop();
 408                         isObjectLitAr.push(true);
 409                         //print(">>>>>> OBJLIT REPUSH(true)");
 410                     }
 411                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 412
 413                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 414                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 415                         // see if we can replace..
 416                         // remove the quotes..
 417                         // should do a bit more checking!!!! (what about wierd char's in the string..
 418                         var str = token.data.substring(1,token.data.length-1);
 419                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 420                             token.outData = str;
 421                         }
 422
 423
 424
 425                     }
 426
 427                     break;
 428
 429                 case "NAME.NAME":
 430                     //print('SCOPE-NAME:' + token.toString());
 431                     //print("DEAL WITH NAME:");
 432                     // got identifier..
 433                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 434                     // skip anyting with "." before it..!!
 435
 436                     if (this.ts.lookTok(-1).data == ".") {
 437                         // skip, it's an object prop.
 438                         //println("<i>"+token.data+"</i>");
 439                         break;
 440                     }
 441                     //print("SYMBOL: " + token.toString());
 442
 443                     symbol = token.data;
 444                     if (symbol == 'this') {
 445                         break;
 446                     }
 447                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 448
 449                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 450
 451                         //print ("MUNGE?" + symbol);
 452
 453                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 454
 455                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 456                         identifier = this.getIdentifier(symbol, scope, token);
 457
 458                         if (identifier == false) {
 459 // BUG!find out where builtin is defined...
 460                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 461                                 // Here, we found an undeclared and un-namespaced symbol that is
 462                                 // 3 characters or less in length. Declare it in the global scope.
 463                                 // We don't need to declare longer symbols since they won't cause
 464                                 // any conflict with other munged symbols.
 465                                 this.globalScope.declareIdentifier(symbol, token);
 466                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 467                             }
 468
 469                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 470                         } else {
 471                             token.identifier = identifier;
 472                             identifier.refcount++;
 473                         }
 474                     }
 475
 476                     break;
 477                     //println("<B>SID</B>");
 478                 default:
 479                     if (token.type != 'KEYW') {
 480                         break;
 481                     }
 482                     //print('SCOPE-KEYW:' + token.toString());
 483                    // print("Check eval:");
 484
 485                     symbol = token.data;
 486
 487                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 488
 489                         if (token.name == "EVAL") {
 490
 491                             //print(JSON.stringify(token, null,4));
 492                             // look back one and see if we can find a comment!!!
 493                             //if (this.ts.look(-1).type == "COMM") {
 494                             if (token.prefix && token.prefix.match(/eval/)) {
 495                                 // look for eval:var:noreplace\n
 496                                 //print("MATCH!?");
 497                                 var _t = this;
 498                                 token.prefix.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 499                                     //print("GOT: " + a);
 500                                     var hi = _t.getIdentifier(a, scope, token);
 501                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 502                                     if (hi) {
 503                                       //  print("PROTECT "+a+" from munge");
 504                                         //print(JSON.stringify(hi,null,4));
 505                                         hi.toMunge = false;
 506                                     }
 507
 508                                 });
 509
 510
 511                             } else {
 512
 513
 514                                 this.protectScopeFromObfuscation(scope);
 515                                 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);
 516                             }
 517
 518                         }
 519
 520                     }
 521                     break;
 522
 523
 524             } // end switch
 525
 526
 527             //print("parseScope TOK : " + token.toString());
 528             token = this.ts.nextTok();
 529             //if (this.ts.nextT()) break;
 530
 531         }
 532         //print("<<< EXIT SCOPE");
 533         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 534     },
 535
 536     expN : 0,
 537     parseExpression : function(scope) {
 538
 539         // Parse the expression until we encounter a comma or a semi-colon
 540         // in the same brace nesting, bracket nesting and paren nesting.
 541         // Parse functions if any...
 542         //println("<i>EXP</i><BR/>");
 543         !this.debug || print("PARSE EXPR");
 544         this.expN++;
 545
 546         // for printing stuff..
 547
 548
 549
 550         var symbol;
 551         var token;
 552
 553         var identifier;
 554
 555         var expressionBraceNesting = this.braceNesting + 0;
 556         var bracketNesting = 0;
 557         var parensNesting = 0;
 558         var isInObjectLitAr;
 559         var isObjectLitAr = [ false ];
 560
 561
 562
 563
 564         //print(scopeIndent + ">> ENTER EXPRESSION" + this.expN);
 565         while ((token = this.ts.nextTok())) {
 566
 567
 568
 569            /*
 570             // moved out of loop?
 571            currentScope = this.scopes[this.scopes.length-1];
 572
 573             var scopeIndent = '';
 574             this.scopes.forEach(function() {
 575                 scopeIndent += '   ';
 576             });
 577            */
 578
 579            //this.dumpToken(token,  this.scopes, this.braceNesting );
 580             //print('EXPR' +  token.toString());
 581
 582
 583             //println("<i>"+token.data+"</i>");
 584             //this.log("EXP:" + token.data);
 585             switch (token.type) {
 586                 case 'PUNC':
 587                     //print("EXPR-PUNC:" + token.toString());
 588
 589                     switch(token.data) {
 590
 591                         case ';':
 592                             //print("<< EXIT EXPRESSION");
 593                             break;
 594
 595                         case ',':
 596
 597                             break;
 598
 599
 600                         case '(': //Token.LP:
 601                         case '{': //Token.LC:
 602                         case '[': //Token.LB:
 603                             //print('SCOPE-CURLY/PAREN/BRACE:' + token.toString());
 604                            // print('SCOPE-CURLY/PAREN/BRACE:' + JSON.stringify(token, null,4));
 605                             //println("<i>"+token.data+"</i>");
 606                             var curTS = this.ts;
 607                             if (token.props) {
 608
 609                                 for (var prop in token.props) {
 610                                     if (!token.props[prop].val.length) {
 611                                         print(JSON.stringify(token.props, null,4));
 612                                     }
 613
 614                                     if (token.props[prop].val[0].data == 'function') {
 615                                         // parse a function..
 616                                         this.ts = new TokenStream(token.props[prop].val);
 617                                         this.ts.nextTok();
 618                                         this.parseFunctionDeclaration(scope);
 619                                         continue;
 620                                     }
 621                                     // key value..
 622
 623                                     this.ts = new TokenStream(token.props[prop].val);
 624                                     this.parseExpression(scope);
 625
 626                                 }
 627                                 this.ts = curTS;
 628
 629                                 // it's an object literal..
 630                                 // the values could be replaced..
 631                                 break;
 632                             }
 633
 634
 635                             var _this = this;
 636                             token.items.forEach(function(expr) {
 637                                   _this.ts = new TokenStream(expr);
 638                                   _this.parseExpression(scope)
 639                             });
 640                             this.ts = curTS;
 641
 642
 643
 644                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 645                             break;
 646
 647
 648
 649
 650
 651                         case ')': //Token.RP:
 652                         case ']': //Token.RB:
 653                         case '}': //Token.RB:
 654                             //print("<< EXIT EXPRESSION");
 655                             return;
 656
 657
 658
 659                             parensNesting++;
 660                             break;
 661
 662
 663
 664                     }
 665                     break;
 666
 667                 case 'STRN': // used for object lit detection..
 668                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 669                         //print("EXPR-STR:" + JSON.stringify(token, null, 4));
 670
 671
 672                     break;
 673
 674
 675
 676                 case 'NAME':
 677                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 678
 679                         //print("EXPR-NAME:" + JSON.stringify(token, null, 4));
 680                     } else {
 681                         //print("EXPR-NAME:" + token.toString());
 682                     }
 683                     symbol = token.data;
 684                     //print("in NAME = " + token.toString());
 685                     //print("in NAME 0: " + this.ts.look(0).toString());
 686                     //print("in NAME 2: " + this.ts.lookTok(2).toString());
 687
 688                     //print(this.ts.lookTok(-1).data);
 689                     // prefixed with '.'
 690                     if (this.ts.lookTok(-1).data == ".") {
 691                         //skip '.'
 692                         break;
 693                     }
 694                     if (symbol == 'this') {
 695                         break;
 696                        }
 697
 698                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 699
 700                         identifier = this.getIdentifier(symbol, scope, token);
 701                         //println("<B>??</B>");
 702                         if (identifier == false) {
 703
 704                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 705                                 // Here, we found an undeclared and un-namespaced symbol that is
 706                                 // 3 characters or less in length. Declare it in the global scope.
 707                                 // We don't need to declare longer symbols since they won't cause
 708                                 // any conflict with other munged symbols.
 709                                 this.globalScope.declareIdentifier(symbol, token);
 710                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 711                                 //print("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')');
 712                                 //throw "OOPS";
 713                             } else {
 714                                 //print("undeclared:" + token.toString())
 715                             }
 716
 717
 718                         } else {
 719                             //println("<B>++</B>");
 720                             token.identifier = identifier;
 721                             identifier.refcount++;
 722                         }
 723
 724                     }
 725                     break;
 726
 727
 728
 729
 730                     //println("<B>EID</B>");
 731                 case 'KEYW':
 732                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 733                     //    print("EXPR-KEYW:" + JSON.stringify(token, null, 4));
 734
 735                     //print('EXPR-KEYW:' + token.toString());
 736                     if (token.name == "FUNCTION") {
 737
 738                         this.parseFunctionDeclaration(scope);
 739                         break;
 740                     }
 741
 742
 743                     symbol = token.data;
 744                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 745
 746                         if (token.name == "EVAL") {
 747                             //print(JSON.stringify(token,null,4));
 748                             if (token.prefix && token.prefix.match(/eval:var:/g)) {
 749                                 // look for eval:var:noreplace\n
 750                                // print("GOT MATCH?");
 751                                 var _t = this;
 752                                 token.prefix.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 753
 754                                     //print("PROTECT: " + a);
 755
 756
 757                                     var hi = _t.getIdentifier(a, scope, token);
 758                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 759                                     if (hi) {
 760                                       //  println("PROTECT "+a+" from munge");
 761                                         hi.toMunge = false;
 762                                     }
 763
 764
 765                                 });
 766
 767                             } else {
 768                                 this.protectScopeFromObfuscation(scope);
 769                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 770                             }
 771
 772
 773                         }
 774                         break;
 775                     }
 776                 default:
 777                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 778                     //    print("EXPR-SKIP:" + JSON.stringify(token, null, 4));
 779                     break;
 780             }
 781
 782         }
 783         //print("<< EXIT EXPRESSION");
 784         this.expN--;
 785     },
 786
 787
 788     parseCatch : function(scope) {
 789
 790         var symbol;
 791         var token;
 792
 793         var identifier;
 794
 795         //token = getToken(-1);
 796         //assert token.getType() == Token.CATCH;
 797         token = this.ts.nextTok(1);
 798         token = this.ts.nextTok(1);
 799
 800
 801         //print(JSON.stringify(this.ts,null,4));
 802         //assert token.getType() == Token.LP; (
 803         //token = this.ts.nextTok();
 804         //assert token.getType() == Token.NAME;
 805
 806         symbol = token.items[0][0].data;
 807
 808
 809         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 810             // We must declare the exception identifier in the containing function
 811             // scope to avoid errors related to the obfuscation process. No need to
 812             // display a warning if the symbol was already declared here...
 813             scope.declareIdentifier(symbol, token.items[0][0]);
 814         } else {
 815             //?? why inc the refcount?? - that should be set when building the tree???
 816             identifier = this.getIdentifier(symbol, scope, token.items[0][0]);
 817             identifier.refcount++;
 818         }
 819
 820         //token = this.ts.nextTok();
 821         //assert token.getType() == Token.RP; // )
 822     },
 823
 824     parseFunctionDeclaration : function(scope)
 825     {
 826         //print("PARSE FUNCTION");
 827         var symbol;
 828         var token;
 829
 830         var fnScope = false;
 831         var identifier;
 832         var b4braceNesting = this.braceNesting + 0;
 833
 834         //this.logR("<B>PARSING FUNCTION</B>");
 835
 836
 837         token = this.ts.nextTok();
 838         if (token.type == "NAME") {
 839             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 840                 // Get the name of the function and declare it in the current scope.
 841                 symbol = token.data;
 842                 if (scope.getIdentifier(symbol,token) != false) {
 843                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 844                 }
 845                 scope.declareIdentifier(symbol,token);
 846             }
 847             token =  this.ts.nextTok();
 848         }
 849
 850
 851         // return function() {....
 852         while (token.data != "(") {
 853             //print(token.toString());
 854             token =  this.ts.nextTok();
 855
 856         }
 857
 858
 859         //assert token.getType() == Token.LP;
 860         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 861             fnScope = new Scope(1, scope, token.n, '', token);
 862
 863             //println("STORING SCOPE" + this.ts.cursor);
 864
 865             this.indexedScopes[token.id] = fnScope;
 866
 867         } else {
 868             //qln("FETCHING SCOPE" + this.ts.cursor);
 869             fnScope = this.indexedScopes[token.id];
 870         }
 871         //if (this.mode == 'BUILDING_SYMBOL_TREE')
 872         //  print('FUNC-PARSE:' + JSON.stringify(token,null,4));
 873         // Parse function arguments.
 874         var args = token.items;
 875         for (var argpos =0; argpos < args.length; argpos++) {
 876
 877             token = args[argpos][0];
 878             //print ("FUNC ARGS: " + token.toString())
 879             //assert token.getType() == Token.NAME ||
 880             //        token.getType() == Token.COMMA;
 881             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 882                 symbol = token.data;
 883                 identifier = fnScope.declareIdentifier(symbol,token);
 884                 if (symbol == "$super" && argpos == 0) {
 885                     // Exception for Prototype 1.6...
 886                     identifier.preventMunging();
 887                 }
 888                 //argpos++;
 889             }
 890         }
 891
 892         token = this.ts.nextTok();
 893         //print('FUNC-BODY:' + JSON.stringify(token.items,null,4));
 894         //Seed.quit();
 895         //print(token.toString());
 896         // assert token.getType() == Token.LC;
 897         //this.braceNesting++;
 898
 899         //token = this.ts.nextTok();
 900         //print(token.toString());
 901         var outTS = this.ts;
 902         var _this = this;
 903         token.items.forEach(function(tar) {
 904             _this.ts = new TokenStream(tar);
 905             _this.parseScope(fnScope);
 906
 907
 908         });
 909
 910         //print(JSON.stringify(this.ts,null,4));
 911         //this.parseScope(fnScope);
 912         this.ts = outTS;
 913         // now pop it off the stack!!!
 914
 915         //this.braceNesting = b4braceNesting;
 916         //print("ENDFN -1: " + this.ts.lookTok(-1).toString());
 917         //print("ENDFN 0: " + this.ts.lookTok(0).toString());
 918         //print("ENDFN 1: " + this.ts.lookTok(1).toString());
 919     },
 920
 921     protectScopeFromObfuscation : function(scope) {
 922             //assert scope != null;
 923
 924         if (scope == this.globalScope) {
 925             // The global scope does not get obfuscated,
 926             // so we don't need to worry about it...
 927             return;
 928         }
 929
 930         // Find the highest local scope containing the specified scope.
 931         while (scope && scope.parent != this.globalScope) {
 932             scope = scope.parent;
 933         }
 934
 935         //assert scope.getParentScope() == globalScope;
 936         scope.preventMunging();
 937     },
 938
 939     getIdentifier: function(symbol, scope, token) {
 940         var identifier;
 941         while (scope != false) {
 942             identifier = scope.getIdentifier(symbol, token);
 943             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 944             if (identifier) {
 945                 return identifier;
 946             }
 947             scope = scope.parent;
 948         }
 949         return false;
 950     }
 951 };