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         int expN =  0;
  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
 558
 559         void parseExpression(Scope scope)
 560         {
 561
 562             // Parse the expression until we encounter a comma or a semi-colon
 563             // in the same brace nesting, bracket nesting and paren nesting.
 564             // Parse functions if any...
 565             //println("<i>EXP</i><BR/>");
 566             //!this.debug || print("PARSE EXPR");
 567             this.expN++;
 568
 569             // for printing stuff..
 570
 571
 572
 573
 574             var expressionBraceNesting = this.braceNesting + 0;
 575             var bracketNesting = 0;
 576             var parensNesting = 0;
 577             var isInObjectLitAr;
 578             var isObjectLitAr = new Gee.ArrayList<boolean>();
 579             isObjectLitAr.add( false);
 580
 581
 582
 583
 584             //print(scopeIndent + ">> ENTER EXPRESSION" + this.expN);
 585             while (null != (token = this.ts.nextTok())) {
 586
 587
 588
 589                /*
 590                 // moved out of loop?
 591                currentScope = this.scopes[this.scopes.length-1];
 592
 593                 var scopeIndent = '';
 594                 this.scopes.forEach(function() {
 595                     scopeIndent += '   ';
 596                 });
 597                */
 598
 599                //this.dumpToken(token,  this.scopes, this.braceNesting );
 600                 //print('EXPR' +  token.toString());
 601
 602
 603                 //println("<i>"+token.data+"</i>");
 604                 //this.log("EXP:" + token.data);
 605                 switch (token.type) {
 606                     case "PUNC":
 607                         //print("EXPR-PUNC:" + token.toString());
 608
 609                         switch(token.data) {
 610
 611                             case ";":
 612                                 //print("<< EXIT EXPRESSION");
 613                                 break;
 614
 615                             case ",":
 616
 617                                 break;
 618
 619
 620                             case "(": //Token.LP:
 621                             case "{": //Token.LC:
 622                             case "[": //Token.LB:
 623                                 //print('SCOPE-CURLY/PAREN/BRACE:' + token.toString());
 624                                // print('SCOPE-CURLY/PAREN/BRACE:' + JSON.stringify(token, null,4));
 625                                 //println("<i>"+token.data+"</i>");
 626                                 var curTS = this.ts;
 627                                 if (token.props.size > 0) {
 628
 629                                      var iter = token.props.map_iterator();
 630
 631                                                                 while(iter.next()) {
 632
 633                                                         TokenKeyMap val = iter.get_value(); // TokenKeyMap
 634
 635
 636
 637                                         //if (val.vals.size < 1) {
 638                                             //print(JSON.stringify(token.props, null,4));
 639                                         //}
 640
 641                                         if (val.vals.get(0).data == "function") {
 642                                             // parse a function..
 643                                             this.ts = new TokenStream(val.vals);
 644                                             this.ts.nextTok();
 645                                             this.parseFunctionDeclaration(scope);
 646                                             continue;
 647                                         }
 648                                         // key value..
 649
 650                                         this.ts = new TokenStream(val.vals);
 651                                         this.parseExpression(scope);
 652
 653                                     }
 654                                     this.ts = curTS;
 655
 656                                     // it's an object literal..
 657                                     // the values could be replaced..
 658                                     break;
 659                                 }
 660
 661
 662
 663                                 foreach(var expr in token.items) {
 664
 665                                       this.ts = new TokenStream(expr);
 666                                       this.parseExpression(scope);
 667                                 }
 668                                 this.ts = curTS;
 669
 670
 671
 672                                 ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 673                                 break;
 674
 675
 676
 677
 678
 679                             case ")": //Token.RP:
 680                             case "]": //Token.RB:
 681                             case "}": //Token.RB:
 682                                 //print("<< EXIT EXPRESSION");
 683                                 return;
 684
 685
 686
 687                                 parensNesting++;
 688                                 break;
 689
 690
 691
 692                         }
 693                         break;
 694
 695                     case 'STRN': // used for object lit detection..
 696                         //if (this.mode == 'BUILDING_SYMBOL_TREE')
 697                             //print("EXPR-STR:" + JSON.stringify(token, null, 4));
 698
 699
 700                         break;
 701
 702
 703
 704                     case 'NAME':
 705                         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 706
 707                             //print("EXPR-NAME:" + JSON.stringify(token, null, 4));
 708                         } else {
 709                             //print("EXPR-NAME:" + token.toString());
 710                         }
 711                         symbol = token.data;
 712                         //print("in NAME = " + token.toString());
 713                         //print("in NAME 0: " + this.ts.look(0).toString());
 714                         //print("in NAME 2: " + this.ts.lookTok(2).toString());
 715
 716                         //print(this.ts.lookTok(-1).data);
 717                         // prefixed with '.'
 718                         if (this.ts.lookTok(-1).data == ".") {
 719                             //skip '.'
 720                             break;
 721                         }
 722                         if (symbol == 'this') {
 723                             break;
 724                            }
 725
 726                         if (this.mode == 'PASS2_SYMBOL_TREE') {
 727
 728                             identifier = this.getIdentifier(symbol, scope, token);
 729                             //println("<B>??</B>");
 730                             if (identifier == false) {
 731
 732                                 if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 733                                     // Here, we found an undeclared and un-namespaced symbol that is
 734                                     // 3 characters or less in length. Declare it in the global scope.
 735                                     // We don't need to declare longer symbols since they won't cause
 736                                     // any conflict with other munged symbols.
 737                                     this.globalScope.declareIdentifier(symbol, token);
 738                                     this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 739                                     //print("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')');
 740                                     //throw "OOPS";
 741                                 } else {
 742                                     //print("undeclared:" + token.toString())
 743                                 }
 744
 745
 746                             } else {
 747                                 //println("<B>++</B>");
 748                                 token.identifier = identifier;
 749                                 identifier.refcount++;
 750                             }
 751
 752                         }
 753                         break;
 754
 755
 756
 757
 758                         //println("<B>EID</B>");
 759                     case 'KEYW':
 760                         //if (this.mode == 'BUILDING_SYMBOL_TREE')
 761                         //    print("EXPR-KEYW:" + JSON.stringify(token, null, 4));
 762
 763                         //print('EXPR-KEYW:' + token.toString());
 764                         if (token.name == "FUNCTION") {
 765
 766                             this.parseFunctionDeclaration(scope);
 767                             break;
 768                         }
 769
 770
 771                         symbol = token.data;
 772                         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 773
 774                             if (token.name == "EVAL") {
 775                                 //print(JSON.stringify(token,null,4));
 776                                 if (token.prefix && token.prefix.match(/eval:var:/g)) {
 777                                     // look for eval:var:noreplace\n
 778                                    // print("GOT MATCH?");
 779                                     var _t = this;
 780                                     token.prefix.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 781
 782                                         //print("PROTECT: " + a);
 783
 784
 785                                         var hi = _t.getIdentifier(a, scope, token);
 786                                        //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 787                                         if (hi) {
 788                                           //  println("PROTECT "+a+" from munge");
 789                                             hi.toMunge = false;
 790                                         }
 791
 792
 793                                     });
 794
 795                                 } else {
 796                                     this.protectScopeFromObfuscation(scope);
 797                                     this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 798                                 }
 799
 800
 801                             }
 802                             break;
 803                         }
 804                     default:
 805                         //if (this.mode == 'BUILDING_SYMBOL_TREE')
 806                         //    print("EXPR-SKIP:" + JSON.stringify(token, null, 4));
 807                         break;
 808                 }
 809
 810             }
 811             //print("<< EXIT EXPRESSION");
 812             this.expN--;
 813         },
 814
 815
 816         parseCatch : function(scope) {
 817
 818             var symbol;
 819             var token;
 820
 821             var identifier;
 822
 823             //token = getToken(-1);
 824             //assert token.getType() == Token.CATCH;
 825             token = this.ts.nextTok(1);
 826             token = this.ts.nextTok(1);
 827
 828
 829             //print(JSON.stringify(this.ts,null,4));
 830             //assert token.getType() == Token.LP; (
 831             //token = this.ts.nextTok();
 832             //assert token.getType() == Token.NAME;
 833
 834             symbol = token.items[0][0].data;
 835
 836
 837             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 838                 // We must declare the exception identifier in the containing function
 839                 // scope to avoid errors related to the obfuscation process. No need to
 840                 // display a warning if the symbol was already declared here...
 841                 scope.declareIdentifier(symbol, token.items[0][0]);
 842             } else {
 843                 //?? why inc the refcount?? - that should be set when building the tree???
 844                 identifier = this.getIdentifier(symbol, scope, token.items[0][0]);
 845                 identifier.refcount++;
 846             }
 847
 848             //token = this.ts.nextTok();
 849             //assert token.getType() == Token.RP; // )
 850         },
 851
 852         parseFunctionDeclaration : function(scope)
 853         {
 854             //print("PARSE FUNCTION");
 855             var symbol;
 856             var token;
 857
 858             var fnScope = false;
 859             var identifier;
 860             var b4braceNesting = this.braceNesting + 0;
 861
 862             //this.logR("<B>PARSING FUNCTION</B>");
 863
 864
 865             token = this.ts.nextTok();
 866             if (token.type == "NAME") {
 867                 if (this.mode == 'BUILDING_SYMBOL_TREE') {
 868                     // Get the name of the function and declare it in the current scope.
 869                     symbol = token.data;
 870                     if (scope.getIdentifier(symbol,token) != false) {
 871                         this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 872                     }
 873                     scope.declareIdentifier(symbol,token);
 874                 }
 875                 token =  this.ts.nextTok();
 876             }
 877
 878
 879             // return function() {....
 880             while (token.data != "(") {
 881                 //print(token.toString());
 882                 token =  this.ts.nextTok();
 883
 884             }
 885
 886
 887             //assert token.getType() == Token.LP;
 888             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 889                 fnScope = new Scope(1, scope, token.n, '', token);
 890
 891                 //println("STORING SCOPE" + this.ts.cursor);
 892
 893                 this.indexedScopes[token.id] = fnScope;
 894
 895             } else {
 896                 //qln("FETCHING SCOPE" + this.ts.cursor);
 897                 fnScope = this.indexedScopes[token.id];
 898             }
 899             //if (this.mode == 'BUILDING_SYMBOL_TREE')
 900             //  print('FUNC-PARSE:' + JSON.stringify(token,null,4));
 901             // Parse function arguments.
 902             var args = token.items;
 903             for (var argpos =0; argpos < args.length; argpos++) {
 904
 905                 token = args[argpos][0];
 906                 //print ("FUNC ARGS: " + token.toString())
 907                 //assert token.getType() == Token.NAME ||
 908                 //        token.getType() == Token.COMMA;
 909                 if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 910                     symbol = token.data;
 911                     identifier = fnScope.declareIdentifier(symbol,token);
 912                     if (symbol == "$super" && argpos == 0) {
 913                         // Exception for Prototype 1.6...
 914                         identifier.preventMunging();
 915                     }
 916                     //argpos++;
 917                 }
 918             }
 919
 920             token = this.ts.nextTok();
 921             //print('FUNC-BODY:' + JSON.stringify(token.items,null,4));
 922             //Seed.quit();
 923             //print(token.toString());
 924             // assert token.getType() == Token.LC;
 925             //this.braceNesting++;
 926
 927             //token = this.ts.nextTok();
 928             //print(token.toString());
 929             var outTS = this.ts;
 930             var _this = this;
 931             token.items.forEach(function(tar) {
 932                 _this.ts = new TokenStream(tar);
 933                 _this.parseScope(fnScope);
 934
 935
 936             });
 937
 938             //print(JSON.stringify(this.ts,null,4));
 939             //this.parseScope(fnScope);
 940             this.ts = outTS;
 941             // now pop it off the stack!!!
 942
 943             //this.braceNesting = b4braceNesting;
 944             //print("ENDFN -1: " + this.ts.lookTok(-1).toString());
 945             //print("ENDFN 0: " + this.ts.lookTok(0).toString());
 946             //print("ENDFN 1: " + this.ts.lookTok(1).toString());
 947         },
 948
 949         protectScopeFromObfuscation : function(scope) {
 950                 //assert scope != null;
 951
 952             if (scope == this.globalScope) {
 953                 // The global scope does not get obfuscated,
 954                 // so we don't need to worry about it...
 955                 return;
 956             }
 957
 958             // Find the highest local scope containing the specified scope.
 959             while (scope && scope.parent != this.globalScope) {
 960                 scope = scope.parent;
 961             }
 962
 963             //assert scope.getParentScope() == globalScope;
 964             scope.preventMunging();
 965         },
 966
 967         getIdentifier: function(symbol, scope, token) {
 968             var identifier;
 969             while (scope != false) {
 970                 identifier = scope.getIdentifier(symbol, token);
 971                 //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 972                 if (identifier) {
 973                     return identifier;
 974                 }
 975                 scope = scope.parent;
 976             }
 977             return false;
 978         }
 979 };