tor-browser

The Tor Browser
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fp-evaluation-order.js (880B)

      1 // Copyright (C) 2020 Kevin Gibbons. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 /*---
      4 esid: sec-date.utc
      5 description: arithmetic in Date is done on floating-point numbers
      6 info: |
      7  [...]
      8  Return TimeClip(MakeDate(MakeDay(yr, m, dt), MakeTime(h, min, s, milli))).
      9 
     10  #sec-maketime
     11 
     12  Let _t_ be ((_h_ `*` msPerHour `+` _m_ `*` msPerMinute) `+` _s_ `*` msPerSecond) `+` _milli_, performing the arithmetic according to IEEE 754-2019 rules (that is, as if using the ECMAScript operators `*` and `+`).
     13 
     14  #sec-makedate
     15 
     16  Return day × msPerDay + time.
     17 ---*/
     18 
     19 assert.sameValue(Date.UTC(1970, 0, 1, 80063993375, 29, 1, -288230376151711740), 29312, 'order of operations / precision in MakeTime');
     20 assert.sameValue(Date.UTC(1970, 0, 213503982336, 0, 0, 0, -18446744073709552000), 34447360, 'precision in MakeDate');
     21 
     22 reportCompare(0, 0);