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52 lines
1.1 KiB
Plaintext
52 lines
1.1 KiB
Plaintext
'use strict';
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var $RangeError = require('es-errors/range');
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var DayWithinYear = require('./DayWithinYear');
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var InLeapYear = require('./InLeapYear');
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// https://262.ecma-international.org/5.1/#sec-15.9.1.4
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module.exports = function MonthFromTime(t) {
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var day = DayWithinYear(t);
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if (0 <= day && day < 31) {
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return 0;
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}
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var leap = InLeapYear(t);
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if (31 <= day && day < (59 + leap)) {
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return 1;
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}
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if ((59 + leap) <= day && day < (90 + leap)) {
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return 2;
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}
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if ((90 + leap) <= day && day < (120 + leap)) {
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return 3;
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}
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if ((120 + leap) <= day && day < (151 + leap)) {
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return 4;
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}
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if ((151 + leap) <= day && day < (181 + leap)) {
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return 5;
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}
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if ((181 + leap) <= day && day < (212 + leap)) {
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return 6;
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}
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if ((212 + leap) <= day && day < (243 + leap)) {
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return 7;
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}
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if ((243 + leap) <= day && day < (273 + leap)) {
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return 8;
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}
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if ((273 + leap) <= day && day < (304 + leap)) {
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return 9;
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}
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if ((304 + leap) <= day && day < (334 + leap)) {
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return 10;
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}
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if ((334 + leap) <= day && day < (365 + leap)) {
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return 11;
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}
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throw new $RangeError('Assertion failed: `day` is out of range');
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};
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