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
 341                         for (var prop in token.props) {
 342
 343
 344                           //  print('SCOPE-PROPS:' + JSON.stringify(token.props[prop],null,4));
 345                             if (token.props[prop].val[0].data == 'function') {
 346                                 // parse a function..
 347                                 this.ts = new TokenStream(token.props[prop].val);
 348                                 this.ts.nextTok();
 349                                 this.parseFunctionDeclaration(scope);
 350
 351                                 continue;
 352                             }
 353                             // key value..
 354
 355                             this.ts = new TokenStream(token.props[prop].val);
 356                             this.parseExpression(scope);
 357
 358                         }
 359                         this.ts = curTS;
 360
 361                         // it's an object literal..
 362                         // the values could be replaced..
 363                         break;
 364                     }
 365
 366                     // ( ... ) or { .... } not object literals..
 367
 368                     var _this = this;
 369                     for (var xx =0; xx < token.items.length; xx++) {
 370                                 expr = token.items[xx];
 371                     //token.items.forEach(function(expr) {
 372                             //print(expr.toString());
 373                            _this.ts = new TokenStream(expr);
 374                             //if (curTS.data == '(') {
 375                                 _this.parseScope(scope)
 376                             //} else {
 377                               //  _this.parseExpression(scope)
 378                             //}
 379
 380                     }
 381                     this.ts = curTS;
 382                     //print("NOT PROPS"); Seed.quit();
 383
 384                     //isObjectLitAr.push(false);
 385                     //this.braceNesting++;
 386
 387                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 388                     break;
 389
 390                 case "PUNC.RIGHT_CURLY": // }
 391                     //print("<< EXIT SCOPE");
 392                     return;
 393
 394                 case "KEYW.WITH":
 395                     //print('SCOPE-WITH:' + token.toString());
 396                     //println("<i>"+token.data+"</i>");
 397                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 398                         // Inside a 'with' block, it is impossible to figure out
 399                         // statically whether a symbol is a local variable or an
 400                         // object member. As a consequence, the only thing we can
 401                         // do is turn the obfuscation off for the highest scope
 402                         // containing the 'with' block.
 403                         this.protectScopeFromObfuscation(scope);
 404                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 405                     }
 406                     break;
 407
 408                 case "KEYW.CATCH":
 409                     //print('SCOPE-CATCH:' + token.toString());
 410                     //println("<i>"+token.data+"</i>");
 411                     this.parseCatch(scope);
 412                     break;
 413
 414                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 415                 case "STRN.SINGLE_QUOTE":
 416                   //  print('SCOPE-STRING:' + token.toString());
 417                     //println("<i>"+token.data+"</i>");
 418
 419                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 420                         // then we are in an object lit.. -> we need to flag the brace as such...
 421                         isObjectLitAr.pop();
 422                         isObjectLitAr.push(true);
 423                         //print(">>>>>> OBJLIT REPUSH(true)");
 424                     }
 425                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 426
 427                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 428                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 429                         // see if we can replace..
 430                         // remove the quotes..
 431                         // should do a bit more checking!!!! (what about wierd char's in the string..
 432                         var str = token.data.substring(1,token.data.length-1);
 433                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 434                             token.outData = str;
 435                         }
 436
 437
 438
 439                     }
 440
 441                     break;
 442
 443                 case "NAME.NAME":
 444                     //print('SCOPE-NAME:' + token.toString());
 445                     //print("DEAL WITH NAME:");
 446                     // got identifier..
 447                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 448                     // skip anyting with "." before it..!!
 449
 450                     if (this.ts.lookTok(-1).data == ".") {
 451                         // skip, it's an object prop.
 452                         //println("<i>"+token.data+"</i>");
 453                         break;
 454                     }
 455                     //print("SYMBOL: " + token.toString());
 456
 457                     symbol = token.data;
 458                     if (symbol == 'this') {
 459                         break;
 460                     }
 461                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 462
 463                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 464
 465                         //print ("MUNGE?" + symbol);
 466
 467                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 468
 469                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 470                         identifier = this.getIdentifier(symbol, scope, token);
 471
 472                         if (identifier == false) {
 473 // BUG!find out where builtin is defined...
 474                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 475                                 // Here, we found an undeclared and un-namespaced symbol that is
 476                                 // 3 characters or less in length. Declare it in the global scope.
 477                                 // We don't need to declare longer symbols since they won't cause
 478                                 // any conflict with other munged symbols.
 479                                 this.globalScope.declareIdentifier(symbol, token);
 480                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 481                             }
 482
 483                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 484                         } else {
 485                             token.identifier = identifier;
 486                             identifier.refcount++;
 487                         }
 488                     }
 489
 490                     break;
 491                     //println("<B>SID</B>");
 492                 default:
 493                     if (token.type != 'KEYW') {
 494                         break;
 495                     }
 496                     //print('SCOPE-KEYW:' + token.toString());
 497                    // print("Check eval:");
 498
 499                     symbol = token.data;
 500
 501                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 502
 503                         if (token.name == "EVAL") {
 504
 505                             //print(JSON.stringify(token, null,4));
 506                             // look back one and see if we can find a comment!!!
 507                             //if (this.ts.look(-1).type == "COMM") {
 508                             if (token.prefix && token.prefix.match(/eval/)) {
 509                                 // look for eval:var:noreplace\n
 510                                 //print("MATCH!?");
 511                                 var _t = this;
 512                                 token.prefix.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 513                                     //print("GOT: " + a);
 514                                     var hi = _t.getIdentifier(a, scope, token);
 515                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 516                                     if (hi) {
 517                                       //  print("PROTECT "+a+" from munge");
 518                                         //print(JSON.stringify(hi,null,4));
 519                                         hi.toMunge = false;
 520                                     }
 521
 522                                 });
 523
 524
 525                             } else {
 526
 527
 528                                 this.protectScopeFromObfuscation(scope);
 529                                 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);
 530                             }
 531
 532                         }
 533
 534                     }
 535                     break;
 536
 537
 538             } // end switch
 539
 540
 541             //print("parseScope TOK : " + token.toString());
 542             token = this.ts.nextTok();
 543             //if (this.ts.nextT()) break;
 544
 545         }
 546         //print("<<< EXIT SCOPE");
 547         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 548     },
 549
 550     expN : 0,
 551     parseExpression : function(scope) {
 552
 553         // Parse the expression until we encounter a comma or a semi-colon
 554         // in the same brace nesting, bracket nesting and paren nesting.
 555         // Parse functions if any...
 556         //println("<i>EXP</i><BR/>");
 557         !this.debug || print("PARSE EXPR");
 558         this.expN++;
 559
 560         // for printing stuff..
 561
 562
 563
 564         var symbol;
 565         var token;
 566
 567         var identifier;
 568
 569         var expressionBraceNesting = this.braceNesting + 0;
 570         var bracketNesting = 0;
 571         var parensNesting = 0;
 572         var isInObjectLitAr;
 573         var isObjectLitAr = [ false ];
 574
 575
 576
 577
 578         //print(scopeIndent + ">> ENTER EXPRESSION" + this.expN);
 579         while ((token = this.ts.nextTok())) {
 580
 581
 582
 583            /*
 584             // moved out of loop?
 585            currentScope = this.scopes[this.scopes.length-1];
 586
 587             var scopeIndent = '';
 588             this.scopes.forEach(function() {
 589                 scopeIndent += '   ';
 590             });
 591            */
 592
 593            //this.dumpToken(token,  this.scopes, this.braceNesting );
 594             //print('EXPR' +  token.toString());
 595
 596
 597             //println("<i>"+token.data+"</i>");
 598             //this.log("EXP:" + token.data);
 599             switch (token.type) {
 600                 case 'PUNC':
 601                     //print("EXPR-PUNC:" + token.toString());
 602
 603                     switch(token.data) {
 604
 605                         case ';':
 606                             //print("<< EXIT EXPRESSION");
 607                             break;
 608
 609                         case ',':
 610
 611                             break;
 612
 613
 614                         case '(': //Token.LP:
 615                         case '{': //Token.LC:
 616                         case '[': //Token.LB:
 617                             //print('SCOPE-CURLY/PAREN/BRACE:' + token.toString());
 618                            // print('SCOPE-CURLY/PAREN/BRACE:' + JSON.stringify(token, null,4));
 619                             //println("<i>"+token.data+"</i>");
 620                             var curTS = this.ts;
 621                             if (token.props) {
 622
 623                                 for (var prop in token.props) {
 624                                     if (!token.props[prop].val.length) {
 625                                         print(JSON.stringify(token.props, null,4));
 626                                     }
 627
 628                                     if (token.props[prop].val[0].data == 'function') {
 629                                         // parse a function..
 630                                         this.ts = new TokenStream(token.props[prop].val);
 631                                         this.ts.nextTok();
 632                                         this.parseFunctionDeclaration(scope);
 633                                         continue;
 634                                     }
 635                                     // key value..
 636
 637                                     this.ts = new TokenStream(token.props[prop].val);
 638                                     this.parseExpression(scope);
 639
 640                                 }
 641                                 this.ts = curTS;
 642
 643                                 // it's an object literal..
 644                                 // the values could be replaced..
 645                                 break;
 646                             }
 647
 648
 649                             var _this = this;
 650                             token.items.forEach(function(expr) {
 651                                   _this.ts = new TokenStream(expr);
 652                                   _this.parseExpression(scope)
 653                             });
 654                             this.ts = curTS;
 655
 656
 657
 658                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 659                             break;
 660
 661
 662
 663
 664
 665                         case ')': //Token.RP:
 666                         case ']': //Token.RB:
 667                         case '}': //Token.RB:
 668                             //print("<< EXIT EXPRESSION");
 669                             return;
 670
 671
 672
 673                             parensNesting++;
 674                             break;
 675
 676
 677
 678                     }
 679                     break;
 680
 681                 case 'STRN': // used for object lit detection..
 682                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 683                         //print("EXPR-STR:" + JSON.stringify(token, null, 4));
 684
 685
 686                     break;
 687
 688
 689
 690                 case 'NAME':
 691                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 692
 693                         //print("EXPR-NAME:" + JSON.stringify(token, null, 4));
 694                     } else {
 695                         //print("EXPR-NAME:" + token.toString());
 696                     }
 697                     symbol = token.data;
 698                     //print("in NAME = " + token.toString());
 699                     //print("in NAME 0: " + this.ts.look(0).toString());
 700                     //print("in NAME 2: " + this.ts.lookTok(2).toString());
 701
 702                     //print(this.ts.lookTok(-1).data);
 703                     // prefixed with '.'
 704                     if (this.ts.lookTok(-1).data == ".") {
 705                         //skip '.'
 706                         break;
 707                     }
 708                     if (symbol == 'this') {
 709                         break;
 710                        }
 711
 712                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 713
 714                         identifier = this.getIdentifier(symbol, scope, token);
 715                         //println("<B>??</B>");
 716                         if (identifier == false) {
 717
 718                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 719                                 // Here, we found an undeclared and un-namespaced symbol that is
 720                                 // 3 characters or less in length. Declare it in the global scope.
 721                                 // We don't need to declare longer symbols since they won't cause
 722                                 // any conflict with other munged symbols.
 723                                 this.globalScope.declareIdentifier(symbol, token);
 724                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 725                                 //print("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')');
 726                                 //throw "OOPS";
 727                             } else {
 728                                 //print("undeclared:" + token.toString())
 729                             }
 730
 731
 732                         } else {
 733                             //println("<B>++</B>");
 734                             token.identifier = identifier;
 735                             identifier.refcount++;
 736                         }
 737
 738                     }
 739                     break;
 740
 741
 742
 743
 744                     //println("<B>EID</B>");
 745                 case 'KEYW':
 746                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 747                     //    print("EXPR-KEYW:" + JSON.stringify(token, null, 4));
 748
 749                     //print('EXPR-KEYW:' + token.toString());
 750                     if (token.name == "FUNCTION") {
 751
 752                         this.parseFunctionDeclaration(scope);
 753                         break;
 754                     }
 755
 756
 757                     symbol = token.data;
 758                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 759
 760                         if (token.name == "EVAL") {
 761                             //print(JSON.stringify(token,null,4));
 762                             if (token.prefix && token.prefix.match(/eval:var:/g)) {
 763                                 // look for eval:var:noreplace\n
 764                                // print("GOT MATCH?");
 765                                 var _t = this;
 766                                 token.prefix.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 767
 768                                     //print("PROTECT: " + a);
 769
 770
 771                                     var hi = _t.getIdentifier(a, scope, token);
 772                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 773                                     if (hi) {
 774                                       //  println("PROTECT "+a+" from munge");
 775                                         hi.toMunge = false;
 776                                     }
 777
 778
 779                                 });
 780
 781                             } else {
 782                                 this.protectScopeFromObfuscation(scope);
 783                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 784                             }
 785
 786
 787                         }
 788                         break;
 789                     }
 790                 default:
 791                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 792                     //    print("EXPR-SKIP:" + JSON.stringify(token, null, 4));
 793                     break;
 794             }
 795
 796         }
 797         //print("<< EXIT EXPRESSION");
 798         this.expN--;
 799     },
 800
 801
 802     parseCatch : function(scope) {
 803
 804         var symbol;
 805         var token;
 806
 807         var identifier;
 808
 809         //token = getToken(-1);
 810         //assert token.getType() == Token.CATCH;
 811         token = this.ts.nextTok(1);
 812         token = this.ts.nextTok(1);
 813
 814
 815         //print(JSON.stringify(this.ts,null,4));
 816         //assert token.getType() == Token.LP; (
 817         //token = this.ts.nextTok();
 818         //assert token.getType() == Token.NAME;
 819
 820         symbol = token.items[0][0].data;
 821
 822
 823         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 824             // We must declare the exception identifier in the containing function
 825             // scope to avoid errors related to the obfuscation process. No need to
 826             // display a warning if the symbol was already declared here...
 827             scope.declareIdentifier(symbol, token.items[0][0]);
 828         } else {
 829             //?? why inc the refcount?? - that should be set when building the tree???
 830             identifier = this.getIdentifier(symbol, scope, token.items[0][0]);
 831             identifier.refcount++;
 832         }
 833
 834         //token = this.ts.nextTok();
 835         //assert token.getType() == Token.RP; // )
 836     },
 837
 838     parseFunctionDeclaration : function(scope)
 839     {
 840         //print("PARSE FUNCTION");
 841         var symbol;
 842         var token;
 843
 844         var fnScope = false;
 845         var identifier;
 846         var b4braceNesting = this.braceNesting + 0;
 847
 848         //this.logR("<B>PARSING FUNCTION</B>");
 849
 850
 851         token = this.ts.nextTok();
 852         if (token.type == "NAME") {
 853             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 854                 // Get the name of the function and declare it in the current scope.
 855                 symbol = token.data;
 856                 if (scope.getIdentifier(symbol,token) != false) {
 857                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 858                 }
 859                 scope.declareIdentifier(symbol,token);
 860             }
 861             token =  this.ts.nextTok();
 862         }
 863
 864
 865         // return function() {....
 866         while (token.data != "(") {
 867             //print(token.toString());
 868             token =  this.ts.nextTok();
 869
 870         }
 871
 872
 873         //assert token.getType() == Token.LP;
 874         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 875             fnScope = new Scope(1, scope, token.n, '', token);
 876
 877             //println("STORING SCOPE" + this.ts.cursor);
 878
 879             this.indexedScopes[token.id] = fnScope;
 880
 881         } else {
 882             //qln("FETCHING SCOPE" + this.ts.cursor);
 883             fnScope = this.indexedScopes[token.id];
 884         }
 885         //if (this.mode == 'BUILDING_SYMBOL_TREE')
 886         //  print('FUNC-PARSE:' + JSON.stringify(token,null,4));
 887         // Parse function arguments.
 888         var args = token.items;
 889         for (var argpos =0; argpos < args.length; argpos++) {
 890
 891             token = args[argpos][0];
 892             //print ("FUNC ARGS: " + token.toString())
 893             //assert token.getType() == Token.NAME ||
 894             //        token.getType() == Token.COMMA;
 895             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 896                 symbol = token.data;
 897                 identifier = fnScope.declareIdentifier(symbol,token);
 898                 if (symbol == "$super" && argpos == 0) {
 899                     // Exception for Prototype 1.6...
 900                     identifier.preventMunging();
 901                 }
 902                 //argpos++;
 903             }
 904         }
 905
 906         token = this.ts.nextTok();
 907         //print('FUNC-BODY:' + JSON.stringify(token.items,null,4));
 908         //Seed.quit();
 909         //print(token.toString());
 910         // assert token.getType() == Token.LC;
 911         //this.braceNesting++;
 912
 913         //token = this.ts.nextTok();
 914         //print(token.toString());
 915         var outTS = this.ts;
 916         var _this = this;
 917         token.items.forEach(function(tar) {
 918             _this.ts = new TokenStream(tar);
 919             _this.parseScope(fnScope);
 920
 921
 922         });
 923
 924         //print(JSON.stringify(this.ts,null,4));
 925         //this.parseScope(fnScope);
 926         this.ts = outTS;
 927         // now pop it off the stack!!!
 928
 929         //this.braceNesting = b4braceNesting;
 930         //print("ENDFN -1: " + this.ts.lookTok(-1).toString());
 931         //print("ENDFN 0: " + this.ts.lookTok(0).toString());
 932         //print("ENDFN 1: " + this.ts.lookTok(1).toString());
 933     },
 934
 935     protectScopeFromObfuscation : function(scope) {
 936             //assert scope != null;
 937
 938         if (scope == this.globalScope) {
 939             // The global scope does not get obfuscated,
 940             // so we don't need to worry about it...
 941             return;
 942         }
 943
 944         // Find the highest local scope containing the specified scope.
 945         while (scope && scope.parent != this.globalScope) {
 946             scope = scope.parent;
 947         }
 948
 949         //assert scope.getParentScope() == globalScope;
 950         scope.preventMunging();
 951     },
 952
 953     getIdentifier: function(symbol, scope, token) {
 954         var identifier;
 955         while (scope != false) {
 956             identifier = scope.getIdentifier(symbol, token);
 957             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 958             if (identifier) {
 959                 return identifier;
 960             }
 961             scope = scope.parent;
 962         }
 963         return false;
 964     }
 965 };