The Tor Browser: js/src/tests/ecma_3/Function/regress-58274.js@6474c204b198 (annotated)

js/src/tests/ecma_3/Function/regress-58274.js@6474c204b198 (annotated)

js/src/tests/ecma_3/Function/regress-58274.js

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 /*
  *
  * Date:    15 July 2002
  * SUMMARY: Testing functions with double-byte names
  * See http://bugzilla.mozilla.org/show_bug.cgi?id=58274
  *
  * Here is a sample of the problem:
  *
  *    js> function f\u02B1 () {}
  *
  *    js> f\u02B1.toSource();
  *    function f¦() {}
  *
  *    js> f\u02B1.toSource().toSource();
  *    (new String("function f\xB1() {}"))
  *
  *
  * See how the high-byte information (the 02) has been lost?
  * The same thing was happening with the toString() method:
  *
  *    js> f\u02B1.toString();
  *
  *    function f¦() {
  *    }
  *
  *    js> f\u02B1.toString().toSource();
  *    (new String("\nfunction f\xB1() {\n}\n"))
  *
  */
 //-----------------------------------------------------------------------------
 var UBound = 0;
 var BUGNUMBER = 58274;
 var summary = 'Testing functions with double-byte names';
 var ERR = 'UNEXPECTED ERROR! \n';
 var ERR_MALFORMED_NAME = ERR + 'Could not find function name in: \n\n';
 var status = '';
 var statusitems = [];
 var actual = '';
 var actualvalues = [];
 var expect= '';
 var expectedvalues = [];
 var sEval;
 var sName;
 sEval = "function f\u02B2() {return 42;}";
 eval(sEval);
 sName = getFunctionName(f\u02B2);
 // Test function call -
 status = inSection(1);
 actual = f\u02B2();
 expect = 42;
 addThis();
 // Test both characters of function name -
 status = inSection(2);
 actual = sName[0];
 expect = sEval[9];
 addThis();
 status = inSection(3);
 actual = sName[1];
 expect = sEval[10];
 addThis();
 sEval = "function f\u02B2\u0AAA () {return 84;}";
 eval(sEval);
 sName = getFunctionName(f\u02B2\u0AAA);
 // Test function call -
 status = inSection(4);
 actual = f\u02B2\u0AAA();
 expect = 84;
 addThis();
 // Test all three characters of function name -
 status = inSection(5);
 actual = sName[0];
 expect = sEval[9];
 addThis();
 status = inSection(6);
 actual = sName[1];
 expect = sEval[10];
 addThis();
 status = inSection(7);
 actual = sName[2];
 expect = sEval[11];
 addThis();
 //-----------------------------------------------------------------------------
 test();
 //-----------------------------------------------------------------------------
 /*
  * Goal: test that f.toString() contains the proper function name.
  *
  * Note, however, f.toString() is implementation-independent. For example,
  * it may begin with '\nfunction' instead of 'function'. Therefore we use
  * a regexp to make sure we extract the name properly.
  *
  * Here we assume that f has been defined by means of a function statement,
  * and not a function expression (where it wouldn't have to have a name).
  *
  * Rhino uses a Unicode representation for f.toString(); whereas
  * SpiderMonkey uses an ASCII representation, putting escape sequences
  * for non-ASCII characters. For example, if a function is called f\u02B1,
  * then in Rhino the toString() method will present a 2-character Unicode
  * string for its name, whereas SpiderMonkey will present a 7-character
  * ASCII string for its name: the string literal 'f\u02B1'.
  *
  * So we force the lexer to condense the string before using it.
  * This will give uniform results in Rhino and SpiderMonkey.
  */
 function getFunctionName(f)
 {
   var s = condenseStr(f.toString());
   var re = /\s*function\s+(\S+)\s*\(/;
     var arr = s.match(re);
   if (!(arr && arr[1]))
     return ERR_MALFORMED_NAME + s;
   return arr[1];
 }
 /*
  * This function is the opposite of functions like escape(), which take
  * Unicode characters and return escape sequences for them. Here, we force
  * the lexer to turn escape sequences back into single characters.
  *
  * Note we can't simply do |eval(str)|, since in practice |str| will be an
  * identifier somewhere in the program (e.g. a function name); thus |eval(str)|
  * would return the object that the identifier represents: not what we want.
  *
  * So we surround |str| lexicographically with quotes to force the lexer to
  * evaluate it as a string. Have to strip out any linefeeds first, however -
  */
 function condenseStr(str)
 {
   /*
    * You won't be able to do the next step if |str| has
    * any carriage returns or linefeeds in it. For example:
    *
    *  js> eval("'" + '\nHello' + "'");
    *  1: SyntaxError: unterminated string literal:
    *  1: '
    *  1: ^
    *
    * So replace them with the empty string -
    */
   str = str.replace(/[\r\n]/g, '')
     return eval("'" + str + "'");
 }
 function addThis()
 {
   statusitems[UBound] = status;
   actualvalues[UBound] = actual;
   expectedvalues[UBound] = expect;
   UBound++;
 }
 function test()
 {
   enterFunc('test');
   printBugNumber(BUGNUMBER);
   printStatus(summary);
   for (var i=0; i<UBound; i++)
   {
     reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
   }
   exitFunc ('test');
 }