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

   1 //<Script type="text/javascript">
   2
   3 Scope = imports.Scope.Scope;
   4 TokenStream = imports.TokenStream.TokenStream;
   5 /**
   6 * Scope stuff
   7 *
   8 * // FIXME - I need this to do next() without doccomments..
   9 *
  10 *
  11 *
  12 * Need to make this alot simpler...
  13 *
  14 * so debugging is possible.
  15 *
  16 *
  17 * at present it just runs along the stream and finds stuff then calls parseExpr .. etc,,
  18 *
  19 *
  20 * It would be better to parse blocks of code rather than the whole stream..
  21 *
  22 *
  23 *
  24 *
  25 *
  26 */
  27
  28 ScopeParser = function(ts) {
  29     this.ts = ts; // {TokenStream}
  30     this.warnings = [];
  31     this.scopes = [];
  32     this.indexedScopes = {};
  33     this.timer = new Date() * 1;
  34     this.debug = false;
  35 }
  36
  37 // list of keywords that should not be used in object literals.
  38 ScopeParser.idents = [
  39         "break",
  40         "case",
  41         "continue",
  42         "default",
  43         "delete",
  44         "do",
  45         "else",
  46         "export",
  47         "false",
  48         "for",
  49         "function",
  50         "if",
  51         "import",
  52         "in",
  53         "new",
  54         "null",
  55         "return",
  56         "switch",
  57         "this",
  58         "true",
  59         "typeof",
  60         "var",
  61         "void",
  62         "while",
  63         "with",
  64
  65         "catch",
  66         "class",
  67         "const",
  68         "debugger",
  69         "enum",
  70         "extends",
  71         "finally",
  72         "super",
  73         "throw",
  74         "try",
  75
  76         "abstract",
  77         "boolean",
  78         "byte",
  79         "char",
  80         "double",
  81         "final",
  82         "float",
  83         "goto",
  84         "implements",
  85         "instanceof",
  86         "int",
  87         "interface",
  88         "long",
  89         "native",
  90         "package",
  91         "private",
  92         "protected",
  93         "public",
  94         "short",
  95         "static",
  96         "synchronized",
  97         "throws",
  98         "transient",
  99                 "include",
 100                 "undefined"
 101 ];
 102
 103
 104 ScopeParser.prototype = {
 105     timer: 0,
 106     timerPrint: function (str) {
 107         var ntime = new Date() * 1;
 108         var tdif =  ntime -this.timer;
 109         this.timer = ntime;
 110         var pref = '';
 111         if (tdif > 100) { //slower ones..
 112             pref = '***';
 113         }
 114         println(pref+'['+tdif+']'+str);
 115
 116     },
 117     warn: function(s) {
 118         //print('****************' + s);
 119         this.warnings.push(s);
 120         //println("WARNING:" + htmlescape(s) + "<BR>");
 121     },
 122     // defaults should not be initialized here =- otherwise they get duped on new, rather than initalized..
 123     warnings : false,
 124     ts : false,
 125     scopes : false,
 126     global : false,
 127     mode : "", //"BUILDING_SYMBOL_TREE",
 128     braceNesting : 0,
 129     indexedScopes : false,
 130     munge: true,
 131
 132
 133
 134
 135
 136     buildSymbolTree : function()
 137     {
 138         //println("<PRE>");
 139
 140         this.ts.rewind();
 141         this.braceNesting = 0;
 142         this.scopes = [];
 143
 144
 145
 146
 147         this.globalScope = new  Scope(-1, false, -1, '');
 148         indexedScopes = { 0 : this.globalScope };
 149
 150         this.mode = 'BUILDING_SYMBOL_TREE';
 151         this.parseScope(this.globalScope);
 152
 153         //print("---------------END PASS 1 ---------------- ");
 154
 155     },
 156     mungeSymboltree : function()
 157     {
 158
 159         if (!this.munge) {
 160             return;
 161         }
 162
 163         // One problem with obfuscation resides in the use of undeclared
 164         // and un-namespaced global symbols that are 3 characters or less
 165         // in length. Here is an example:
 166         //
 167         //     var declaredGlobalVar;
 168         //
 169         //     function declaredGlobalFn() {
 170         //         var localvar;
 171         //         localvar = abc; // abc is an undeclared global symbol
 172         //     }
 173         //
 174         // In the example above, there is a slim chance that localvar may be
 175         // munged to 'abc', conflicting with the undeclared global symbol
 176         // abc, creating a potential bug. The following code detects such
 177         // global symbols. This must be done AFTER the entire file has been
 178         // parsed, and BEFORE munging the symbol tree. Note that declaring
 179         // extra symbols in the global scope won't hurt.
 180         //
 181         // Note: Since we go through all the tokens to do this, we also use
 182         // the opportunity to count how many times each identifier is used.
 183
 184         this.ts.rewind();
 185         this.braceNesting = 0;
 186         this.scopes= [];
 187         this.mode = 'PASS2_SYMBOL_TREE';
 188
 189         //println("MUNGING?");
 190
 191         this.parseScope(this.globalScope);
 192         this.globalScope.munge();
 193     },
 194
 195
 196     log : function(str)
 197     {
 198         print ("                    ".substring(0, this.braceNesting*2) + str);
 199
 200         //println("<B>LOG:</B>" + htmlescape(str) + "<BR/>\n");
 201     },
 202     logR : function(str)
 203     {
 204             //println("<B>LOG:</B>" + str + "<BR/>");
 205     },
 206
 207
 208
 209
 210
 211     parseScope : function(scope) // parse a token stream..
 212     {
 213         //this.timerPrint("parseScope EnterScope");
 214         //this.log(">>> ENTER SCOPE" + this.scopes.length);
 215         var symbol;
 216         var token;
 217
 218         var identifier;
 219
 220         var expressionBraceNesting = this.braceNesting + 0;
 221
 222         var parensNesting = 0;
 223
 224         var isObjectLitAr = [ false ];
 225         var isInObjectLitAr;
 226         this.scopes.push(scope);
 227
 228         //var scopeIndent = '';
 229         //this.scopes.forEach(function() {
 230         //    scopeIndent += '   ';
 231         //});
 232         print(">> ENTER SCOPE");
 233
 234
 235
 236
 237         token = this.ts.lookTok(1);
 238         while (token) {
 239           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 240             //this.dumpToken(token , this.scopes, this.braceNesting);
 241             print('SCOPE:' + token.toString());
 242             //this.log(token.data);
 243             if (token.type == 'NAME') {
 244             //    print('*' + token.data);
 245             }
 246             switch(token.type + '.' + token.name) {
 247                 case "KEYW.VAR":
 248                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 249                     print('SCOPE-VAR:' + token.toString());
 250                     var vstart = this.ts.cursor +1;
 251
 252                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 253                     while (true) {
 254                         token = this.ts.nextTok();
 255                         //!this.debug|| print( token.toString());
 256                         print('SCOPE-VAR:' + token.toString());
 257                         if (!token) { // can return false at EOF!
 258                             break;
 259                         }
 260                         if (token.name == "VAR" || token.data == ',') { // kludge..
 261                             continue;
 262                         }
 263                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 264                         if (token.type != "NAME") {
 265                             for(var i = Math.max(this.ts.cursor-10,0); i < this.ts.cursor+1; i++) {
 266                                 print(this.ts.tokens[i].toString());
 267                             }
 268
 269                             print( "var without ident");
 270                             Seed.quit()
 271                         }
 272
 273
 274                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 275                             identifier = scope.getIdentifier(token.data) ;
 276
 277                             if (identifier == false) {
 278                                 scope.declareIdentifier(token.data, token);
 279                             } else {
 280                                 token.identifier = identifier;
 281                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 282                             }
 283                         }
 284
 285                         token = this.ts.nextTok();
 286                         !this.debug|| print(token.toString());
 287                         /*
 288                         assert token.getType() == Token.SEMI ||
 289                                 token.getType() == Token.ASSIGN ||
 290                                 token.getType() == Token.COMMA ||
 291                                 token.getType() == Token.IN;
 292                         */
 293                         if (token.name == "IN") {
 294                             break;
 295                         } else {
 296                             //var bn = this.braceNesting;
 297                             var bn = this.braceNesting;
 298                             this.parseExpression();
 299                             this.braceNesting = bn;
 300                             //this.braceNesting = bn;
 301                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 302
 303                             token = this.ts.lookTok(1);
 304                             !this.debug|| print("AFTER EXP: " + token.toString());
 305                             if (token.data == ';') {
 306                                 break;
 307                             }
 308                         }
 309                     }
 310
 311                     //print("VAR:")
 312                     //this.ts.dump(vstart , this.ts.cursor);
 313
 314                     break;
 315                 case "KEYW.FUNCTION":
 316                     if (this.mode == 'BUILDING_SYMBOL_TREE')
 317                         print('SCOPE-FUNC:' + JSON.stringify(token,null,4));
 318                     //println("<i>"+token.data+"</i>");
 319                      var bn = this.braceNesting;
 320                     this.parseFunctionDeclaration();
 321                      this.braceNesting = bn;
 322                     break;
 323
 324                 case "PUNC.LEFT_CURLY": // {
 325                 case "PUNC.LEFT_PAREN": // (
 326                     print('SCOPE-CURLY/PAREN:' + token.toString());
 327                     //println("<i>"+token.data+"</i>");
 328                     var curTS = this.ts;
 329                     if (token.props) {
 330
 331                         for (var prop in token.props) {
 332
 333
 334                           //  print('SCOPE-PROPS:' + JSON.stringify(token.props[prop],null,4));
 335                             if (token.props[prop].val[0].data == 'function') {
 336                                 // parse a function..
 337                                 this.ts = new TokenStream(token.props[prop].val);
 338                                 this.ts.nextTok();
 339                                 this.parseFunctionDeclaration();
 340
 341                                 continue;
 342                             }
 343                             // key value..
 344
 345                             this.ts = new TokenStream(token.props[prop].val);
 346                             this.parseScope(scope);
 347
 348                         }
 349                         this.ts = curTS;
 350
 351                         // it's an object literal..
 352                         // the values could be replaced..
 353                         break;
 354                     }
 355
 356
 357                     var _this = this;
 358                     token.items.forEach(function(expr) {
 359                           _this.ts = new TokenStream(expr);
 360                           _this.parseExpression(scope)
 361                     });
 362                     this.ts = curTS;
 363                     //print("NOT PROPS"); Seed.quit();
 364
 365                     //isObjectLitAr.push(false);
 366                     //this.braceNesting++;
 367
 368                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 369                     break;
 370
 371                 case "PUNC.RIGHT_CURLY": // }
 372                     print("<< EXIT SCOPE");
 373                     return;
 374                 /*
 375                     //println("<i>"+token.data+"</i>");
 376                     this.braceNesting--;
 377                     isObjectLitAr.pop();
 378                     //print(">>>>>> OBJLIT POP"+ this.braceNesting);
 379                         //assert braceNesting >= scope.getBra ceNesting();
 380
 381                     if (this.braceNesting < expressionBraceNesting) {
 382                         var ls = this.scopes.pop();
 383                         ls.getUsedSymbols();
 384                         // eat symbol if we are currently at {
 385                         if (this.ts.look(0).data == '{') {
 386                             this.ts.nextTok();
 387                         }
 388
 389                         print("<<<<<<<EXIT SCOPE" +this.scopes.length);
 390                         return;
 391                     }
 392                     break;
 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();
 412                     break;
 413                 /*
 414                 case Token.SPECIALCOMMENT:
 415                         if (mode == BUILDING_SYMBOL_TREE) {
 416                             protectScopeFromObfuscation(scope);
 417                             this.warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression." : ""), true);
 418                         }
 419                         break;
 420                 */
 421
 422                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 423                 case "STRN.SINGLE_QUOTE":
 424                     print('SCOPE-STRING:' + token.toString());
 425                     //println("<i>"+token.data+"</i>");
 426
 427                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 428                         // then we are in an object lit.. -> we need to flag the brace as such...
 429                         isObjectLitAr.pop();
 430                         isObjectLitAr.push(true);
 431                         //print(">>>>>> OBJLIT REPUSH(true)");
 432                     }
 433                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 434
 435                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 436                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 437                         // see if we can replace..
 438                         // remove the quotes..
 439                         // should do a bit more checking!!!! (what about wierd char's in the string..
 440                         var str = token.data.substring(1,token.data.length-1);
 441                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 442                             token.outData = str;
 443                         }
 444
 445
 446
 447                     }
 448
 449
 450
 451                     break;
 452
 453                 case "NAME.NAME":
 454                     print('SCOPE-NAME:' + token.toString());
 455                     //print("DEAL WITH NAME:");
 456                     // got identifier..
 457
 458                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 459                     if ((this.ts.lookTok(-1).data == "{") && (this.ts.lookTok(1).data == ":")) {
 460                         isObjectLitAr.pop();
 461                         isObjectLitAr.push(true);
 462                         //print(">>>>>> OBJLIT REPUSH(true)");
 463                         //println("<i>"+token.data+"</i>");
 464                         break;
 465                     }
 466                    // print("DEAL WITH obj lit:");
 467                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 468
 469                     if (isInObjectLitAr && (this.ts.lookTok(1).data == ":") && (this.ts.lookTok(-1).data == ",")) {
 470                         // skip, it's an object lit key..
 471                         //println("<i>"+token.data+"</i>");
 472                         break;
 473                     }
 474
 475
 476                     // skip anyting with "." before it..!!
 477
 478                     if (this.ts.lookTok(-1).data == ".") {
 479                         // skip, it's an object prop.
 480                         //println("<i>"+token.data+"</i>");
 481                         break;
 482                     }
 483                     //print("SYMBOL: " + token.toString());
 484
 485                     symbol = token.data;
 486                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 487
 488                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 489
 490                         //print ("MUNGE?" + symbol);
 491
 492                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 493
 494                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 495                         identifier = this.getIdentifier(symbol, scope);
 496
 497                         if (identifier == false) {
 498 // BUG!find out where builtin is defined...
 499                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 500                                 // Here, we found an undeclared and un-namespaced symbol that is
 501                                 // 3 characters or less in length. Declare it in the global scope.
 502                                 // We don't need to declare longer symbols since they won't cause
 503                                 // any conflict with other munged symbols.
 504                                 this.globalScope.declareIdentifier(symbol, token);
 505                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 506                             }
 507
 508                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 509                         } else {
 510                             token.identifier = identifier;
 511                             identifier.refcount++;
 512                         }
 513                     }
 514
 515                     break;
 516                     //println("<B>SID</B>");
 517                 default:
 518                     if (token.type != 'KEYW') {
 519                         break;
 520                     }
 521                     print('SCOPE-KEYW:' + token.toString());
 522                    // print("Check eval:");
 523
 524                     symbol = token.data;
 525
 526                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 527
 528                         if (symbol == "eval") {
 529                             // look back one and see if we can find a comment!!!
 530                             if (this.ts.look(-1).type == "COMM") {
 531                                 // look for eval:var:noreplace\n
 532                                 var _t = this;
 533                                 this.ts.look(-1).data.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 534
 535                                     var hi = _t.getIdentifier(a, scope);
 536                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 537                                     if (hi) {
 538                                      //   println("PROTECT "+a+" from munge");
 539                                         hi.toMunge = false;
 540                                     }
 541
 542                                 });
 543
 544
 545                             } else {
 546
 547
 548                                 this.protectScopeFromObfuscation(scope);
 549                                 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);
 550                             }
 551
 552                         }
 553
 554                     }
 555                     break;
 556
 557
 558             } // end switch
 559
 560
 561             //print("parseScope TOK : " + token.toString());
 562             token = this.ts.nextTok();
 563             //if (this.ts.nextT()) break;
 564
 565         }
 566         print("<<< EXIT SCOPE");
 567         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 568     },
 569
 570     expN : 0,
 571     parseExpression : function() {
 572
 573         // Parse the expression until we encounter a comma or a semi-colon
 574         // in the same brace nesting, bracket nesting and paren nesting.
 575         // Parse functions if any...
 576         //println("<i>EXP</i><BR/>");
 577         !this.debug || print("PARSE EXPR");
 578         this.expN++;
 579
 580         // for printing stuff..
 581
 582
 583
 584         var symbol;
 585         var token;
 586         var currentScope;
 587         var identifier;
 588
 589         var expressionBraceNesting = this.braceNesting + 0;
 590         var bracketNesting = 0;
 591         var parensNesting = 0;
 592         var isInObjectLitAr;
 593         var isObjectLitAr = [ false ];
 594
 595         currentScope = this.scopes[this.scopes.length-1];
 596
 597
 598         //print(scopeIndent + ">> ENTER EXPRESSION" + this.expN);
 599         while (token = this.ts.nextTok()) {
 600
 601
 602
 603            /*
 604             // moved out of loop?
 605            currentScope = this.scopes[this.scopes.length-1];
 606
 607             var scopeIndent = '';
 608             this.scopes.forEach(function() {
 609                 scopeIndent += '   ';
 610             });
 611            */
 612
 613            //this.dumpToken(token,  this.scopes, this.braceNesting );
 614            print('EXP' +  token.toString());
 615
 616
 617             //println("<i>"+token.data+"</i>");
 618             //this.log("EXP:" + token.data);
 619             switch (token.type) {
 620                 case 'PUNC':
 621                     print("EXPR-PUNC:" + token.toString());
 622
 623                     switch(token.data) {
 624
 625                         case ';':
 626                             print("<< EXIT EXPRESSION");
 627                             break;
 628
 629                         case ',':
 630
 631                             break;
 632
 633
 634                         case '(': //Token.LP:
 635                         case '{': //Token.LC:
 636                         case '[': //Token.LB:
 637                             print('SCOPE-CURLY/PAREN/BRACE:' + token.toString());
 638                             //println("<i>"+token.data+"</i>");
 639                             var curTS = this.ts;
 640                             if (token.props) {
 641
 642                                 for (var prop in token.props) {
 643                                     if (token.props[prop].val.data == 'function') {
 644                                         // parse a function..
 645                                         this.parseFunctProp(token.props[prop]);
 646                                         continue;
 647                                     }
 648                                     // key value..
 649
 650                                     this.ts = new TokenStream(token.props[prop].val);
 651                                     this.parseScope(currentScope);
 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                             var _this = this;
 663                             token.items.forEach(function(expr) {
 664                                   _this.ts = new TokenStream(expr);
 665                                   _this.parseExpression()
 666                             });
 667                             this.ts = curTS;
 668
 669
 670
 671                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 672                             break;
 673
 674
 675
 676
 677
 678                         case ')': //Token.RP:
 679                         case ']': //Token.RB:
 680                         case '}': //Token.RB:
 681                             print("<< EXIT EXPRESSION");
 682                             return;
 683
 684
 685
 686                             parensNesting++;
 687                             break;
 688
 689
 690
 691                     }
 692                     break;
 693
 694                 case 'STRN': // used for object lit detection..
 695                     if (this.mode == 'BUILDING_SYMBOL_TREE')
 696                         print("EXPR-STR:" + JSON.stringify(token, null, 4));
 697
 698
 699                     break;
 700
 701
 702
 703                 case 'NAME':
 704                     if (this.mode == 'BUILDING_SYMBOL_TREE')
 705                         print("EXPR-NAME:" + JSON.stringify(token, null, 4));
 706                     symbol = token.data;
 707                     //print("in NAME = " + token.toString());
 708                     //print("in NAME 0: " + this.ts.look(0).toString());
 709                     //print("in NAME 2: " + this.ts.lookTok(2).toString());
 710
 711                     //print(this.ts.lookTok(0).data);
 712                     if (this.ts.lookTok(0).data == ".") {
 713                         //skip '.'
 714                         break;
 715                     }
 716
 717                      if (this.mode == 'PASS2_SYMBOL_TREE') {
 718
 719                         identifier = this.getIdentifier(symbol, currentScope);
 720                         //println("<B>??</B>");
 721                         if (identifier == false) {
 722
 723                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 724                                 // Here, we found an undeclared and un-namespaced symbol that is
 725                                 // 3 characters or less in length. Declare it in the global scope.
 726                                 // We don't need to declare longer symbols since they won't cause
 727                                 // any conflict with other munged symbols.
 728                                 this.globalScope.declareIdentifier(symbol, token);
 729                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 730                             } else {
 731                                 //println("undeclared")
 732                             }
 733
 734
 735                         } else {
 736                             //println("<B>++</B>");
 737                             token.identifier = identifier;
 738                             identifier.refcount++;
 739                         }
 740
 741                     }
 742                     break;
 743
 744
 745
 746
 747                     //println("<B>EID</B>");
 748                 case 'KEYW':
 749                     if (this.mode == 'BUILDING_SYMBOL_TREE')
 750                         print("EXPR-KEYW:" + JSON.stringify(token, null, 4));
 751                     if (token.name == "FUNCTION") {
 752
 753                         this.parseFunctionDeclaration();
 754                         break;
 755                     }
 756
 757
 758
 759                     symbol = token.data;
 760                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 761
 762                         if (symbol == "eval") {
 763                             if (this.ts.look(-1).type == 'COMM') {
 764                                 // look for eval:var:noreplace\n
 765                                 var _t = this;
 766                                 this.ts.look(-1).data.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 767                                     var hi = _t.getIdentifier(a, currentScope);
 768                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 769                                     if (hi) {
 770                                       //  println("PROTECT "+a+" from munge");
 771                                         hi.toMunge = false;
 772                                     }
 773
 774
 775                                 });
 776
 777                             } else {
 778                                 this.protectScopeFromObfuscation(currentScope);
 779                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 780                             }
 781
 782
 783                         }
 784                         break;
 785                     }
 786                 default:
 787                     if (this.mode == 'BUILDING_SYMBOL_TREE')
 788                         print("EXPR-SKIP:" + JSON.stringify(token, null, 4));
 789                     break;
 790             }
 791
 792         }
 793         print("<< EXIT EXPRESSION");
 794         this.expN--;
 795     },
 796
 797
 798     parseCatch : function() {
 799
 800         var symbol;
 801         var token;
 802         var currentScope;
 803         var identifier;
 804
 805         //token = getToken(-1);
 806         //assert token.getType() == Token.CATCH;
 807         token = this.ts.nextTok();
 808         //assert token.getType() == Token.LP; (
 809         token = this.ts.nextTok();
 810         //assert token.getType() == Token.NAME;
 811
 812         symbol = token.data;
 813         currentScope = this.scopes[this.scopes.length-1];
 814
 815         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 816             // We must declare the exception identifier in the containing function
 817             // scope to avoid errors related to the obfuscation process. No need to
 818             // display a warning if the symbol was already declared here...
 819             currentScope.declareIdentifier(symbol, token);
 820         } else {
 821             //?? why inc the refcount?? - that should be set when building the tree???
 822             identifier = this.getIdentifier(symbol, currentScope);
 823             identifier.refcount++;
 824         }
 825
 826         token = this.ts.nextTok();
 827         //assert token.getType() == Token.RP; // )
 828     },
 829
 830     parseFunctionDeclaration : function()
 831     {
 832         //print("PARSE FUNCTION");
 833         var symbol;
 834         var token;
 835         var currentScope  = false;
 836         var fnScope = false;
 837         var identifier;
 838         var b4braceNesting = this.braceNesting + 0;
 839
 840         //this.logR("<B>PARSING FUNCTION</B>");
 841         currentScope = this.scopes[this.scopes.length-1];
 842
 843         token = this.ts.nextTok();
 844         if (token.type == "NAME") {
 845             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 846                 // Get the name of the function and declare it in the current scope.
 847                 symbol = token.data;
 848                 if (currentScope.getIdentifier(symbol) != false) {
 849                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 850                 }
 851                 currentScope.declareIdentifier(symbol,token);
 852             }
 853             token =  this.ts.nextTok();
 854         }
 855
 856         //assert token.getType() == Token.LP;
 857         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 858             fnScope = new Scope(this.braceNesting, currentScope, token.n, '');
 859
 860             //println("STORING SCOPE" + this.ts.cursor);
 861
 862             this.indexedScopes[this.ts.cursor] = fnScope;
 863
 864         } else {
 865             //qln("FETCHING SCOPE" + this.ts.cursor);
 866             fnScope = this.indexedScopes[this.ts.cursor];
 867
 868         }
 869         if (this.mode == 'BUILDING_SYMBOL_TREE')
 870             print('FUNC-PARSE:' + JSON.stringify(token,null,4));
 871         // Parse function arguments.
 872         var args = token.items;
 873         for (var argpos =0; argpos < args.length; argpos++) {
 874
 875             token = args[argpos][0];
 876             print ("FUNC ARGS: " + token.toString())
 877             //assert token.getType() == Token.NAME ||
 878             //        token.getType() == Token.COMMA;
 879             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 880                 symbol = token.data;
 881                 identifier = fnScope.declareIdentifier(symbol,token);
 882                 if (symbol == "$super" && argpos == 0) {
 883                     // Exception for Prototype 1.6...
 884                     identifier.preventMunging();
 885                 }
 886                 //argpos++;
 887             }
 888         }
 889
 890         token = this.ts.nextTok();
 891         //print('FUNC-BODY:' + JSON.stringify(token.items,null,4));
 892         //Seed.quit();
 893         //print(token.toString());
 894         // assert token.getType() == Token.LC;
 895         //this.braceNesting++;
 896
 897         //token = this.ts.nextTok();
 898         //print(token.toString());
 899         var outTS = this.ts;
 900         var _this = this;
 901         token.items.forEach(function(tar) {
 902             _this.ts = new TokenStream(tar);
 903             _this.parseScope(fnScope);
 904
 905         });
 906
 907         //print(JSON.stringify(this.ts,null,4));
 908         //this.parseScope(fnScope);
 909         this.ts = outTS;
 910         // now pop it off the stack!!!
 911
 912         //this.braceNesting = b4braceNesting;
 913         //print("ENDFN -1: " + this.ts.lookTok(-1).toString());
 914         //print("ENDFN 0: " + this.ts.lookTok(0).toString());
 915         //print("ENDFN 1: " + this.ts.lookTok(1).toString());
 916     },
 917
 918     protectScopeFromObfuscation : function(scope) {
 919             //assert scope != null;
 920
 921         if (scope == this.globalScope) {
 922             // The global scope does not get obfuscated,
 923             // so we don't need to worry about it...
 924             return;
 925         }
 926
 927         // Find the highest local scope containing the specified scope.
 928         while (scope && scope.parent != this.globalScope) {
 929             scope = scope.parent;
 930         }
 931
 932         //assert scope.getParentScope() == globalScope;
 933         scope.preventMunging();
 934     },
 935
 936     getIdentifier: function(symbol, scope) {
 937         var identifier;
 938         while (scope != false) {
 939             identifier = scope.getIdentifier(symbol);
 940             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 941             if (identifier) {
 942                 return identifier;
 943             }
 944             scope = scope.parent;
 945         }
 946         return false;
 947     }
 948 };