tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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regress-329383.js (1611B)

      1 /* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this
      4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 //-----------------------------------------------------------------------------
      7 var BUGNUMBER = 329383;
      8 var summary = 'Math copysign issues';
      9 var actual = '';
     10 var expect = '';
     11 
     12 printBugNumber(BUGNUMBER);
     13 printStatus (summary);
     14 
     15 var inputs = [
     16  -Infinity,
     17  -10.01,
     18  -9.01,
     19  -8.01,
     20  -7.01,
     21  -6.01,
     22  -5.01,
     23  -4.01,
     24  -Math.PI,
     25  -3.01,
     26  -2.01,
     27  -1.01,
     28  -0.5,
     29  -0.49,
     30  -0.01,
     31  -0,
     32  0,
     33  +0,
     34  0.01,
     35  0.49,
     36  0.50,
     37  0,
     38  1.01,
     39  2.01,
     40  3.01,
     41  Math.PI,
     42  4.01,
     43  5.01,
     44  6.01,
     45  7.01,
     46  8.01,
     47  9.01,
     48  10.01,
     49  Infinity
     50  ];
     51 
     52 var iinput;
     53 
     54 for (iinput = 0; iinput < inputs.length; iinput++)
     55 {
     56  var input = inputs[iinput];
     57  reportCompare(Math.round(input),
     58                emulateRound(input),
     59                summary + ': Math.round(' + input + ')');
     60 }
     61 
     62 reportCompare(isNaN(Math.round(NaN)),
     63              isNaN(emulateRound(NaN)),
     64              summary + ': Math.round(' + input + ')');
     65 
     66 function emulateRound(x)
     67 {
     68  if (!isFinite(x) || x === 0) return x
     69    if (-0.5 <= x && x < 0) return -0
     70      return Math.floor(x + 0.5)
     71      }
     72 
     73 var z;
     74 
     75 z = Math.min(-0, 0);
     76 
     77 reportCompare(-Math.PI, Math.atan2(z, z), summary + ': Math.atan2(-0, -0)');
     78 reportCompare(-Infinity, 1/z, summary + ': 1/-0');
     79 
     80 z = Math.max(-0, 0);
     81 
     82 reportCompare(0, Math.atan2(z, z), summary + ': Math.atan2(0, 0)');
     83 reportCompare(Infinity, 1/z, summary + ': 1/0');