The Tor Browser: js/src/tests/ecma_3/Unicode/uc-005.js@129ffea94266 (annotated)

js/src/tests/ecma_3/Unicode/uc-005.js@129ffea94266 (annotated)

js/src/tests/ecma_3/Unicode/uc-005.js

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /* -*- 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 identifiers 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 identifiers with double-byte names';
 var status = '';
 var statusitems = [];
 var actual = '';
 var actualvalues = [];
 var expect= '';
 var expectedvalues = [];
 /*
  * Define a function that uses double-byte identifiers in
  * "every possible way"
  *
  * Then recover each double-byte identifier via f.toString().
  * To make this easier, put a 'Z' token before every one.
  *
  * Our eval string will be:
  *
  * sEval = "function Z\u02b1(Z\u02b2, b) {
  *          try { Z\u02b3 : var Z\u02b4 = Z\u02b1; }
  *          catch (Z\u02b5) { for (var Z\u02b6 in Z\u02b5)
  *          {for (1; 1<0; Z\u02b7++) {new Array()[Z\u02b6] = 1;} };} }";
  *
  * It will be helpful to build this string in stages:
  */
 var s0 =  'function Z';
 var s1 =  '\u02b1(Z';
 var s2 =  '\u02b2, b) {try { Z';
 var s3 =  '\u02b3 : var Z';
 var s4 =  '\u02b4 = Z';
 var s5 =  '\u02b1; } catch (Z'
   var s6 =  '\u02b5) { for (var Z';
 var s7 =  '\u02b6 in Z';
 var s8 =  '\u02b5){for (1; 1<0; Z';
 var s9 =  '\u02b7++) {new Array()[Z';
 var s10 = '\u02b6] = 1;} };} }';
 /*
  * Concatenate these and eval() to create the function Z\u02b1
  */
 var sEval = s0 + s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10;
 eval(sEval);
 /*
  * Recover all the double-byte identifiers via Z\u02b1.toString().
  * We'll recover the 1st one as arrID[1], the 2nd one as arrID[2],
  * and so on ...
  */
 var arrID = getIdentifiers(Z\u02b1);
 /*
  * Now check that we got back what we put in -
  */
 status = inSection(1);
 actual = arrID[1];
 expect = s1.charAt(0);
 addThis();
 status = inSection(2);
 actual = arrID[2];
 expect = s2.charAt(0);
 addThis();
 status = inSection(3);
 actual = arrID[3];
 expect = s3.charAt(0);
 addThis();
 status = inSection(4);
 actual = arrID[4];
 expect = s4.charAt(0);
 addThis();
 status = inSection(5);
 actual = arrID[5];
 expect = s5.charAt(0);
 addThis();
 status = inSection(6);
 actual = arrID[6];
 expect = s6.charAt(0);
 addThis();
 status = inSection(7);
 actual = arrID[7];
 expect = s7.charAt(0);
 addThis();
 status = inSection(8);
 actual = arrID[8];
 expect = s8.charAt(0);
 addThis();
 status = inSection(9);
 actual = arrID[9];
 expect = s9.charAt(0);
 addThis();
 status = inSection(10);
 actual = arrID[10];
 expect = s10.charAt(0);
 addThis();
 //-----------------------------------------------------------------------------
 test();
 //-----------------------------------------------------------------------------
 /*
  * Goal: recover the double-byte identifiers from f.toString()
  * by getting the very next character after each 'Z' token.
  *
  * The return value will be an array |arr| indexed such that
  * |arr[1]| is the 1st identifier, |arr[2]| the 2nd, and so on.
  *
  * Note, however, f.toString() is implementation-independent.
  * For example, it may begin with '\nfunction' instead of 'function'.
  *
  * 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 we use it.
  * This will give uniform results in Rhino and SpiderMonkey.
  */
 function getIdentifiers(f)
 {
   var str = condenseStr(f.toString());
   var arr = str.split('Z');
   /*
    * The identifiers are the 1st char of each split substring
    * EXCEPT the first one, which is just ('\n' +) 'function '.
    *
    * Thus note the 1st identifier will be stored in |arr[1]|,
    * the 2nd one in |arr[2]|, etc., making the indexing easy -
    */
   for (i in arr)
     arr[i] = arr[i].charAt(0);
   return arr;
 }
 /*
  * This function is the opposite of a 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');
 }