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authorGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
committerGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
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+'use strict';
+
+var GetIntrinsic = require('../GetIntrinsic');
+
+var $floor = GetIntrinsic('%Math.floor%');
+var $DateUTC = GetIntrinsic('%Date.UTC%');
+
+var mod = require('../helpers/mod');
+var $isFinite = require('../helpers/isFinite');
+
+var DateFromTime = require('./DateFromTime');
+var Day = require('./Day');
+var MonthFromTime = require('./MonthFromTime');
+var ToInteger = require('./ToInteger');
+var YearFromTime = require('./YearFromTime');
+
+// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.12
+
+module.exports = function MakeDay(year, month, date) {
+ if (!$isFinite(year) || !$isFinite(month) || !$isFinite(date)) {
+ return NaN;
+ }
+ var y = ToInteger(year);
+ var m = ToInteger(month);
+ var dt = ToInteger(date);
+ var ym = y + $floor(m / 12);
+ var mn = mod(m, 12);
+ var t = $DateUTC(ym, mn, 1);
+ if (YearFromTime(t) !== ym || MonthFromTime(t) !== mn || DateFromTime(t) !== 1) {
+ return NaN;
+ }
+ return Day(t) + dt - 1;
+};