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

   1
   2
   3
   4 namespace JSDOC {
   5
   6         public enum ScopeParserMode {
   7                 BUILDING_SYMBOL_TREE,
   8                 PASS2_SYMBOL_TREE
   9         }
  10
  11
  12         public class ScopeParser : Object {
  13
  14         TokenStream ts;
  15         Gee.ArrayList<string> warnings;
  16
  17         bool debug = false;
  18         string[] idents;
  19
  20
  21     Scope global ;
  22     ScopeParserMode mode;
  23     //braceNesting : 0,
  24     Gee.HashMap<int,Scope> indexedScopes;
  25     bool munge =  true;
  26
  27
  28
  29         public ScopeParser(TokenStream ts) {
  30                 this.ts = ts; // {TokenStream}
  31                 this.warnings = new Gee.ArrayList<string>();
  32                 this.globalScope = new  Scope(-1, false, -1, '');
  33                 this.indexedScopes = new Gee.HashMap<int,Scope>();
  34
  35                 //this.indexedg = {};
  36                 //this.timer = new Date() * 1;
  37                 this.idents = {
  38
  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
 105
 106
 107     void warn(string s)
 108     {
 109         //print('****************' + s);
 110         this.warnings.add(s);
 111         //println("WARNING:" + htmlescape(s) + "<BR>");
 112     }
 113
 114
 115     // defaults should not be initialized here =- otherwise they get duped on new, rather than initalized..
 116
 117
 118
 119
 120
 121
 122     void buildSymbolTree()
 123     {
 124         //println("<PRE>");
 125
 126         this.ts.rewind();
 127         this.braceNesting = 0;
 128
 129        // print(JSON.stringify(this.ts.tokens, null,4));
 130
 131
 132         this.globalScope = new  Scope(-1, false, -1, '');
 133         this.indexedScopes = new Gee.HashMap<int,Scope>();
 134         this.indexedScopes.set(0, this.globalScope );
 135
 136         this.mode = ScopeParserMode.BUILDING_SYMBOL_TREE;
 137
 138         this.parseScope(this.globalScope);
 139
 140         //print("---------------END PASS 1 ---------------- ");
 141
 142     }
 143
 144     void mungeSymboltree()
 145     {
 146
 147         if (!this.munge) {
 148             return;
 149         }
 150
 151         // One problem with obfuscation resides in the use of undeclared
 152         // and un-namespaced global symbols that are 3 characters or less
 153         // in length. Here is an example:
 154         //
 155         //     var declaredGlobalVar;
 156         //
 157         //     function declaredGlobalFn() {
 158         //         var localvar;
 159         //         localvar = abc; // abc is an undeclared global symbol
 160         //     }
 161         //
 162         // In the example above, there is a slim chance that localvar may be
 163         // munged to 'abc', conflicting with the undeclared global symbol
 164         // abc, creating a potential bug. The following code detects such
 165         // global symbols. This must be done AFTER the entire file has been
 166         // parsed, and BEFORE munging the symbol tree. Note that declaring
 167         // extra symbols in the global scope won't hurt.
 168         //
 169         // Note: Since we go through all the tokens to do this, we also use
 170         // the opportunity to count how many times each identifier is used.
 171
 172         this.ts.rewind();
 173         this.braceNesting = 0;
 174         this.mode = ScopeParserMode.PASS2_SYMBOL_TREE;
 175
 176         //println("MUNGING?");
 177
 178         this.parseScope(this.globalScope);
 179
 180         //this.globalScope.dump();
 181
 182
 183         this.globalScope.munge();
 184     }
 185
 186
 187     void log(string str)
 188     {
 189         print(str);
 190         //print ("                    ".substring(0, this.braceNesting*2) + str);
 191
 192         //println("<B>LOG:</B>" + htmlescape(str) + "<BR/>\n");
 193     }
 194     void logR (string str)
 195     {
 196             //println("<B>LOG:</B>" + str + "<BR/>");
 197     }
 198
 199
 200
 201
 202
 203     void parseScope(Scope scope) // parse a token stream..
 204     {
 205         //this.timerPrint("parseScope EnterScope");
 206         //this.log(">>> ENTER SCOPE" + this.scopes.length);
 207
 208         var expressionBraceNesting = this.braceNesting + 0;
 209
 210         var parensNesting = 0;
 211
 212         var isObjectLitAr = new Gee.ArrayList<bool>();
 213         isObjectLitAr.add(false);
 214
 215
 216
 217         //var scopeIndent = '';
 218         //this.scopes.forEach(function() {
 219         //    scopeIndent += '   ';
 220         //});
 221         //print(">> ENTER SCOPE");
 222
 223
 224
 225
 226         var token = this.ts.lookTok(1);
 227         while (token != null) {
 228           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 229             //this.dumpToken(token , this.scopes, this.braceNesting);
 230             //print('SCOPE:' + token.toString());
 231             //this.log(token.data);
 232             //if (token.type == 'NAME') {
 233             //    print('*' + token.data);
 234             //}
 235             switch(token.type + '.' + token.name) {
 236                 case "KEYW.VAR":
 237                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 238                     //print('SCOPE-VAR:' + token.toString());
 239                     var vstart = this.ts.cursor +1;
 240
 241                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 242                     while (true) {
 243                         token = this.ts.nextTok();
 244                         //!this.debug|| print( token.toString());
 245                        // print('SCOPE-VAR-VAL:' + JSON.stringify(token, null, 4));
 246                         if (token == null) { // can return false at EOF!
 247                             break;
 248                         }
 249                         if (token.name == "VAR" || token.data == ",") { // kludge..
 250                             continue;
 251                         }
 252                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 253                         if (token.type != "NAME") {
 254
 255                             for(var i = int.max(this.ts.cursor-10,0); i < this.ts.cursor+1; i++) {
 256                                 print(this.ts.tokens[i].toString());
 257                             }
 258
 259                             print( "var without ident");
 260                             GLib.Process.exit (0);
 261                         }
 262
 263
 264                         if (this.mode == ScopeParserMode.BUILDING_SYMBOL_TREE) {
 265                             var identifier = scope.getIdentifier(token.data,token) ;
 266
 267                             if (identifier == false) {
 268                                 scope.declareIdentifier(token.data, token);
 269                             } else {
 270                                 token.identifier = identifier;
 271                                 this.warn("(SCOPE) The variable " + token.data  + " (line:" + token.line + ")  has already been declared in the same scope...");
 272                             }
 273                         }
 274
 275                         token = this.ts.nextTok();
 276                         //!this.debug|| print(token.toString());
 277                         /*
 278                         assert token.getType() == Token.SEMI ||
 279                                 token.getType() == Token.ASSIGN ||
 280                                 token.getType() == Token.COMMA ||
 281                                 token.getType() == Token.IN;
 282                         */
 283                         if (token.name == "IN") {
 284                             break;
 285                         } else {
 286                             //var bn = this.braceNesting;
 287                             var bn = this.braceNesting;
 288                             var nts = new Gee.ArrayList<Token>();
 289                             while (true) {
 290                                 if (!token || token.type == "VOID" || token.data == ",") {
 291                                     break;
 292                                 }
 293                                 nts.add(token);
 294                                 token = this.ts.nextTok();
 295                             }
 296                             if (nts.size > 0) {
 297                                 var TS = this.ts;
 298                                 this.ts = new TokenStream(nts);
 299                                 this.parseExpression(scope);
 300                                 this.ts = TS;
 301                             }
 302
 303                             this.braceNesting = bn;
 304                             //this.braceNesting = bn;
 305                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 306
 307                             token = this.ts.lookTok(1);
 308                             //!this.debug||
 309                            // 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
 321
 322                 case "KEYW.FUNCTION":
 323                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 324                     //    print('SCOPE-FUNC:' + JSON.stringify(token,null,4));
 325                     //println("<i>"+token.data+"</i>");
 326                      var bn = this.braceNesting;
 327                     this.parseFunctionDeclaration(scope);
 328                      this.braceNesting = bn;
 329                     break;
 330
 331                 case "PUNC.LEFT_CURLY": // {
 332                 case "PUNC.LEFT_PAREN": // (
 333                 case "PUNC.LEFT_BRACE": // [
 334                     //print('SCOPE-CURLY/PAREN:' + token.toString());
 335                     //println("<i>"+token.data+"</i>");
 336                     var curTS = this.ts;
 337                     if (token.props.size() > 0) {
 338
 339                         // { a : ... , c : .... }
 340                         var iter = token.props.map_iterator();
 341
 342                         while(iter.next()) {
 343
 344                             TokenKeyMap val = iter.get_value(); // TokenKeyMap
 345
 346
 347                           //  print('SCOPE-PROPS:' + JSON.stringify(token.props[prop],null,4));
 348                             if (val.vals.get(0).data == "function") {
 349                                 // parse a function..
 350                                 this.ts = new TokenStream(val.vals);
 351                                 this.ts.nextTok();
 352                                 this.parseFunctionDeclaration(scope);
 353
 354                                 continue;
 355                             }
 356                             // key value..
 357
 358                             this.ts = new TokenStream(val.vals);
 359                             this.parseExpression(scope);
 360
 361                         }
 362                         this.ts = curTS;
 363
 364                         // it's an object literal..
 365                         // the values could be replaced..
 366                         break;
 367                     }
 368
 369                     // ( ... ) or { .... } not object literals..
 370
 371
 372                     for (var xx =0; xx < token.items.size; xx++) {
 373                                         expr = token.items.get(xx);
 374                     //token.items.forEach(function(expr) {
 375                             //print(expr.toString());
 376                            this.ts = new TokenStream(expr);
 377                             //if (curTS.data == '(') {
 378                                 this.parseScope(scope);
 379                             //} else {
 380                               //  _this.parseExpression(scope)
 381                             //}
 382
 383                     }
 384                     this.ts = curTS;
 385                     //print("NOT PROPS"); Seed.quit();
 386
 387                     //isObjectLitAr.push(false);
 388                     //this.braceNesting++;
 389
 390                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 391                     break;
 392
 393                 case "PUNC.RIGHT_CURLY": // }
 394                     //print("<< EXIT SCOPE");
 395                     return;
 396
 397                 case "KEYW.WITH":
 398                     //print('SCOPE-WITH:' + token.toString());
 399                     //println("<i>"+token.data+"</i>");
 400                     if (this.mode == ScopeParserMode.BUILDING_SYMBOL_TREE) {
 401                         // Inside a 'with' block, it is impossible to figure out
 402                         // statically whether a symbol is a local variable or an
 403                         // object member. As a consequence, the only thing we can
 404                         // do is turn the obfuscation off for the highest scope
 405                         // containing the 'with' block.
 406                         this.protectScopeFromObfuscation(scope);
 407                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 408                     }
 409                     break;
 410
 411                 case "KEYW.CATCH":
 412                     //print('SCOPE-CATCH:' + token.toString());
 413                     //println("<i>"+token.data+"</i>");
 414                     this.parseCatch(scope);
 415                     break;
 416
 417                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 418                 case "STRN.SINGLE_QUOTE":
 419                   //  print('SCOPE-STRING:' + token.toString());
 420                     //println("<i>"+token.data+"</i>");
 421
 422                     if (this.ts.lookTok(-1).data == "{" && this.ts.lookTok(1).data == ":") {
 423                         // then we are in an object lit.. -> we need to flag the brace as such...
 424                         isObjectLitAr.remove_at(isObjectLitAr.size-1);
 425                         isObjectLitAr.add(true);
 426                         //print(">>>>>> OBJLIT REPUSH(true)");
 427                     }
 428                     isInObjectLitAr = isObjectLitAr.get(isObjectLitAr.size-1);
 429
 430                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ":" &&
 431                         ( this.ts.lookTok(-1).data == "{"  ||  this.ts.lookTok(-1).data == ":" )) {
 432                         // see if we can replace..
 433                         // remove the quotes..
 434                         // should do a bit more checking!!!! (what about wierd char's in the string..
 435                         var str = token.data.substring(1,token.data.length-1);
 436
 437                         if (Regex.match_simple ("^[a-z_]+$", str) && this.idents.index_of(str) < 0) {
 438                             token.outData = str;
 439                         }
 440
 441
 442
 443                     }
 444
 445                     break;
 446
 447                 case "NAME.NAME":
 448                     //print('SCOPE-NAME:' + token.toString());
 449                     //print("DEAL WITH NAME:");
 450                     // got identifier..
 451                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 452                     // skip anyting with "." before it..!!
 453
 454                     if (this.ts.lookTok(-1).data == ".") {
 455                         // skip, it's an object prop.
 456                         //println("<i>"+token.data+"</i>");
 457                         break;
 458                     }
 459                     //print("SYMBOL: " + token.toString());
 460
 461                     symbol = token.data;
 462                     if (symbol == "this") {
 463                         break;
 464                     }
 465
 466                     if (this.mode == ScopeParserMode.PASS2_SYMBOL_TREE) {
 467
 468                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 469
 470                         //print ("MUNGE?" + symbol);
 471
 472                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 473
 474                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 475                         identifier = this.getIdentifier(symbol, scope, token);
 476
 477                         if (identifier == false) {
 478 // BUG!find out where builtin is defined...
 479                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 480                                 // Here, we found an undeclared and un-namespaced symbol that is
 481                                 // 3 characters or less in length. Declare it in the global scope.
 482                                 // We don't need to declare longer symbols since they won't cause
 483                                 // any conflict with other munged symbols.
 484                                 this.globalScope.declareIdentifier(symbol, token);
 485                                 this.warn("Found an undeclared symbol: " + symbol + " (line:" + token.line + ")", true);
 486                             }
 487
 488                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 489                         } else {
 490                             token.identifier = identifier;
 491                             identifier.refcount++;
 492                         }
 493                     }
 494
 495                     break;
 496                     //println("<B>SID</B>");
 497                 default:
 498                     if (token.type != "KEYW") {
 499                         break;
 500                     }
 501                     //print('SCOPE-KEYW:' + token.toString());
 502                    // print("Check eval:");
 503
 504                     symbol = token.data;
 505
 506                      if (this.mode == ScopeParserMode.BUILDING_SYMBOL_TREE) {
 507
 508                         if (token.name == "EVAL") {
 509
 510                             //print(JSON.stringify(token, null,4));
 511                             // look back one and see if we can find a comment!!!
 512                             //if (this.ts.look(-1).type == "COMM") {
 513                             if (token.prefix && token.prefix.match(/eval/)) {
 514                                 // look for eval:var:noreplace\n
 515                                 //print("MATCH!?");
 516                                 var _t = this;
 517
 518
 519                                 token.prefix.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 520                                     //print("GOT: " + a);
 521                                     var hi = _t.getIdentifier(a, scope, token);
 522                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 523                                     if (hi) {
 524                                       //  print("PROTECT "+a+" from munge");
 525                                         //print(JSON.stringify(hi,null,4));
 526                                         hi.toMunge = false;
 527                                     }
 528
 529                                 });
 530
 531
 532                             } else {
 533
 534
 535                                 this.protectScopeFromObfuscation(scope);
 536                                 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);
 537                             }
 538
 539                         }
 540
 541                     }
 542                     break;
 543
 544
 545             } // end switch
 546
 547
 548             //print("parseScope TOK : " + token.toString());
 549             token = this.ts.nextTok();
 550             //if (this.ts.nextT()) break;
 551
 552         }
 553         //print("<<< EXIT SCOPE");
 554         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 555     }
 556
 557     int expN : 0,
 558     parseExpression : function(scope) {
 559
 560         // Parse the expression until we encounter a comma or a semi-colon
 561         // in the same brace nesting, bracket nesting and paren nesting.
 562         // Parse functions if any...
 563         //println("<i>EXP</i><BR/>");
 564         !this.debug || print("PARSE EXPR");
 565         this.expN++;
 566
 567         // for printing stuff..
 568
 569
 570
 571         var symbol;
 572         var token;
 573
 574         var identifier;
 575
 576         var expressionBraceNesting = this.braceNesting + 0;
 577         var bracketNesting = 0;
 578         var parensNesting = 0;
 579         var isInObjectLitAr;
 580         var isObjectLitAr = [ false ];
 581
 582
 583
 584
 585         //print(scopeIndent + ">> ENTER EXPRESSION" + this.expN);
 586         while ((token = this.ts.nextTok())) {
 587
 588
 589
 590            /*
 591             // moved out of loop?
 592            currentScope = this.scopes[this.scopes.length-1];
 593
 594             var scopeIndent = '';
 595             this.scopes.forEach(function() {
 596                 scopeIndent += '   ';
 597             });
 598            */
 599
 600            //this.dumpToken(token,  this.scopes, this.braceNesting );
 601             //print('EXPR' +  token.toString());
 602
 603
 604             //println("<i>"+token.data+"</i>");
 605             //this.log("EXP:" + token.data);
 606             switch (token.type) {
 607                 case 'PUNC':
 608                     //print("EXPR-PUNC:" + token.toString());
 609
 610                     switch(token.data) {
 611
 612                         case ';':
 613                             //print("<< EXIT EXPRESSION");
 614                             break;
 615
 616                         case ',':
 617
 618                             break;
 619
 620
 621                         case '(': //Token.LP:
 622                         case '{': //Token.LC:
 623                         case '[': //Token.LB:
 624                             //print('SCOPE-CURLY/PAREN/BRACE:' + token.toString());
 625                            // print('SCOPE-CURLY/PAREN/BRACE:' + JSON.stringify(token, null,4));
 626                             //println("<i>"+token.data+"</i>");
 627                             var curTS = this.ts;
 628                             if (token.props) {
 629
 630                                 for (var prop in token.props) {
 631                                     if (!token.props[prop].val.length) {
 632                                         print(JSON.stringify(token.props, null,4));
 633                                     }
 634
 635                                     if (token.props[prop].val[0].data == 'function') {
 636                                         // parse a function..
 637                                         this.ts = new TokenStream(token.props[prop].val);
 638                                         this.ts.nextTok();
 639                                         this.parseFunctionDeclaration(scope);
 640                                         continue;
 641                                     }
 642                                     // key value..
 643
 644                                     this.ts = new TokenStream(token.props[prop].val);
 645                                     this.parseExpression(scope);
 646
 647                                 }
 648                                 this.ts = curTS;
 649
 650                                 // it's an object literal..
 651                                 // the values could be replaced..
 652                                 break;
 653                             }
 654
 655
 656                             var _this = this;
 657                             token.items.forEach(function(expr) {
 658                                   _this.ts = new TokenStream(expr);
 659                                   _this.parseExpression(scope)
 660                             });
 661                             this.ts = curTS;
 662
 663
 664
 665                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 666                             break;
 667
 668
 669
 670
 671
 672                         case ')': //Token.RP:
 673                         case ']': //Token.RB:
 674                         case '}': //Token.RB:
 675                             //print("<< EXIT EXPRESSION");
 676                             return;
 677
 678
 679
 680                             parensNesting++;
 681                             break;
 682
 683
 684
 685                     }
 686                     break;
 687
 688                 case 'STRN': // used for object lit detection..
 689                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 690                         //print("EXPR-STR:" + JSON.stringify(token, null, 4));
 691
 692
 693                     break;
 694
 695
 696
 697                 case 'NAME':
 698                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 699
 700                         //print("EXPR-NAME:" + JSON.stringify(token, null, 4));
 701                     } else {
 702                         //print("EXPR-NAME:" + token.toString());
 703                     }
 704                     symbol = token.data;
 705                     //print("in NAME = " + token.toString());
 706                     //print("in NAME 0: " + this.ts.look(0).toString());
 707                     //print("in NAME 2: " + this.ts.lookTok(2).toString());
 708
 709                     //print(this.ts.lookTok(-1).data);
 710                     // prefixed with '.'
 711                     if (this.ts.lookTok(-1).data == ".") {
 712                         //skip '.'
 713                         break;
 714                     }
 715                     if (symbol == 'this') {
 716                         break;
 717                        }
 718
 719                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 720
 721                         identifier = this.getIdentifier(symbol, scope, token);
 722                         //println("<B>??</B>");
 723                         if (identifier == false) {
 724
 725                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 726                                 // Here, we found an undeclared and un-namespaced symbol that is
 727                                 // 3 characters or less in length. Declare it in the global scope.
 728                                 // We don't need to declare longer symbols since they won't cause
 729                                 // any conflict with other munged symbols.
 730                                 this.globalScope.declareIdentifier(symbol, token);
 731                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 732                                 //print("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')');
 733                                 //throw "OOPS";
 734                             } else {
 735                                 //print("undeclared:" + token.toString())
 736                             }
 737
 738
 739                         } else {
 740                             //println("<B>++</B>");
 741                             token.identifier = identifier;
 742                             identifier.refcount++;
 743                         }
 744
 745                     }
 746                     break;
 747
 748
 749
 750
 751                     //println("<B>EID</B>");
 752                 case 'KEYW':
 753                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 754                     //    print("EXPR-KEYW:" + JSON.stringify(token, null, 4));
 755
 756                     //print('EXPR-KEYW:' + token.toString());
 757                     if (token.name == "FUNCTION") {
 758
 759                         this.parseFunctionDeclaration(scope);
 760                         break;
 761                     }
 762
 763
 764                     symbol = token.data;
 765                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 766
 767                         if (token.name == "EVAL") {
 768                             //print(JSON.stringify(token,null,4));
 769                             if (token.prefix && token.prefix.match(/eval:var:/g)) {
 770                                 // look for eval:var:noreplace\n
 771                                // print("GOT MATCH?");
 772                                 var _t = this;
 773                                 token.prefix.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 774
 775                                     //print("PROTECT: " + a);
 776
 777
 778                                     var hi = _t.getIdentifier(a, scope, token);
 779                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 780                                     if (hi) {
 781                                       //  println("PROTECT "+a+" from munge");
 782                                         hi.toMunge = false;
 783                                     }
 784
 785
 786                                 });
 787
 788                             } else {
 789                                 this.protectScopeFromObfuscation(scope);
 790                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 791                             }
 792
 793
 794                         }
 795                         break;
 796                     }
 797                 default:
 798                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 799                     //    print("EXPR-SKIP:" + JSON.stringify(token, null, 4));
 800                     break;
 801             }
 802
 803         }
 804         //print("<< EXIT EXPRESSION");
 805         this.expN--;
 806     },
 807
 808
 809     parseCatch : function(scope) {
 810
 811         var symbol;
 812         var token;
 813
 814         var identifier;
 815
 816         //token = getToken(-1);
 817         //assert token.getType() == Token.CATCH;
 818         token = this.ts.nextTok(1);
 819         token = this.ts.nextTok(1);
 820
 821
 822         //print(JSON.stringify(this.ts,null,4));
 823         //assert token.getType() == Token.LP; (
 824         //token = this.ts.nextTok();
 825         //assert token.getType() == Token.NAME;
 826
 827         symbol = token.items[0][0].data;
 828
 829
 830         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 831             // We must declare the exception identifier in the containing function
 832             // scope to avoid errors related to the obfuscation process. No need to
 833             // display a warning if the symbol was already declared here...
 834             scope.declareIdentifier(symbol, token.items[0][0]);
 835         } else {
 836             //?? why inc the refcount?? - that should be set when building the tree???
 837             identifier = this.getIdentifier(symbol, scope, token.items[0][0]);
 838             identifier.refcount++;
 839         }
 840
 841         //token = this.ts.nextTok();
 842         //assert token.getType() == Token.RP; // )
 843     },
 844
 845     parseFunctionDeclaration : function(scope)
 846     {
 847         //print("PARSE FUNCTION");
 848         var symbol;
 849         var token;
 850
 851         var fnScope = false;
 852         var identifier;
 853         var b4braceNesting = this.braceNesting + 0;
 854
 855         //this.logR("<B>PARSING FUNCTION</B>");
 856
 857
 858         token = this.ts.nextTok();
 859         if (token.type == "NAME") {
 860             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 861                 // Get the name of the function and declare it in the current scope.
 862                 symbol = token.data;
 863                 if (scope.getIdentifier(symbol,token) != false) {
 864                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 865                 }
 866                 scope.declareIdentifier(symbol,token);
 867             }
 868             token =  this.ts.nextTok();
 869         }
 870
 871
 872         // return function() {....
 873         while (token.data != "(") {
 874             //print(token.toString());
 875             token =  this.ts.nextTok();
 876
 877         }
 878
 879
 880         //assert token.getType() == Token.LP;
 881         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 882             fnScope = new Scope(1, scope, token.n, '', token);
 883
 884             //println("STORING SCOPE" + this.ts.cursor);
 885
 886             this.indexedScopes[token.id] = fnScope;
 887
 888         } else {
 889             //qln("FETCHING SCOPE" + this.ts.cursor);
 890             fnScope = this.indexedScopes[token.id];
 891         }
 892         //if (this.mode == 'BUILDING_SYMBOL_TREE')
 893         //  print('FUNC-PARSE:' + JSON.stringify(token,null,4));
 894         // Parse function arguments.
 895         var args = token.items;
 896         for (var argpos =0; argpos < args.length; argpos++) {
 897
 898             token = args[argpos][0];
 899             //print ("FUNC ARGS: " + token.toString())
 900             //assert token.getType() == Token.NAME ||
 901             //        token.getType() == Token.COMMA;
 902             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 903                 symbol = token.data;
 904                 identifier = fnScope.declareIdentifier(symbol,token);
 905                 if (symbol == "$super" && argpos == 0) {
 906                     // Exception for Prototype 1.6...
 907                     identifier.preventMunging();
 908                 }
 909                 //argpos++;
 910             }
 911         }
 912
 913         token = this.ts.nextTok();
 914         //print('FUNC-BODY:' + JSON.stringify(token.items,null,4));
 915         //Seed.quit();
 916         //print(token.toString());
 917         // assert token.getType() == Token.LC;
 918         //this.braceNesting++;
 919
 920         //token = this.ts.nextTok();
 921         //print(token.toString());
 922         var outTS = this.ts;
 923         var _this = this;
 924         token.items.forEach(function(tar) {
 925             _this.ts = new TokenStream(tar);
 926             _this.parseScope(fnScope);
 927
 928
 929         });
 930
 931         //print(JSON.stringify(this.ts,null,4));
 932         //this.parseScope(fnScope);
 933         this.ts = outTS;
 934         // now pop it off the stack!!!
 935
 936         //this.braceNesting = b4braceNesting;
 937         //print("ENDFN -1: " + this.ts.lookTok(-1).toString());
 938         //print("ENDFN 0: " + this.ts.lookTok(0).toString());
 939         //print("ENDFN 1: " + this.ts.lookTok(1).toString());
 940     },
 941
 942     protectScopeFromObfuscation : function(scope) {
 943             //assert scope != null;
 944
 945         if (scope == this.globalScope) {
 946             // The global scope does not get obfuscated,
 947             // so we don't need to worry about it...
 948             return;
 949         }
 950
 951         // Find the highest local scope containing the specified scope.
 952         while (scope && scope.parent != this.globalScope) {
 953             scope = scope.parent;
 954         }
 955
 956         //assert scope.getParentScope() == globalScope;
 957         scope.preventMunging();
 958     },
 959
 960     getIdentifier: function(symbol, scope, token) {
 961         var identifier;
 962         while (scope != false) {
 963             identifier = scope.getIdentifier(symbol, token);
 964             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 965             if (identifier) {
 966                 return identifier;
 967             }
 968             scope = scope.parent;
 969         }
 970         return false;
 971     }
 972 };