| Leo Repp | 58b9f11 | 2021-11-22 11:57:47 +0100 | [diff] [blame^] | 1 | 'use strict'; |
| 2 | |
| 3 | var GetIntrinsic = require('get-intrinsic'); |
| 4 | |
| 5 | var $EvalError = GetIntrinsic('%EvalError%'); |
| 6 | |
| 7 | var DayWithinYear = require('./DayWithinYear'); |
| 8 | var InLeapYear = require('./InLeapYear'); |
| 9 | var MonthFromTime = require('./MonthFromTime'); |
| 10 | |
| 11 | // https://262.ecma-international.org/5.1/#sec-15.9.1.5 |
| 12 | |
| 13 | module.exports = function DateFromTime(t) { |
| 14 | var m = MonthFromTime(t); |
| 15 | var d = DayWithinYear(t); |
| 16 | if (m === 0) { |
| 17 | return d + 1; |
| 18 | } |
| 19 | if (m === 1) { |
| 20 | return d - 30; |
| 21 | } |
| 22 | var leap = InLeapYear(t); |
| 23 | if (m === 2) { |
| 24 | return d - 58 - leap; |
| 25 | } |
| 26 | if (m === 3) { |
| 27 | return d - 89 - leap; |
| 28 | } |
| 29 | if (m === 4) { |
| 30 | return d - 119 - leap; |
| 31 | } |
| 32 | if (m === 5) { |
| 33 | return d - 150 - leap; |
| 34 | } |
| 35 | if (m === 6) { |
| 36 | return d - 180 - leap; |
| 37 | } |
| 38 | if (m === 7) { |
| 39 | return d - 211 - leap; |
| 40 | } |
| 41 | if (m === 8) { |
| 42 | return d - 242 - leap; |
| 43 | } |
| 44 | if (m === 9) { |
| 45 | return d - 272 - leap; |
| 46 | } |
| 47 | if (m === 10) { |
| 48 | return d - 303 - leap; |
| 49 | } |
| 50 | if (m === 11) { |
| 51 | return d - 333 - leap; |
| 52 | } |
| 53 | throw new $EvalError('Assertion failed: MonthFromTime returned an impossible value: ' + m); |
| 54 | }; |