mirror of
https://github.com/musix-org/musix-oss
synced 2024-12-23 16:13:18 +00:00
48 lines
1019 B
JavaScript
48 lines
1019 B
JavaScript
'use strict';
|
|
|
|
var DayWithinYear = require('./DayWithinYear');
|
|
var InLeapYear = require('./InLeapYear');
|
|
|
|
// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.4
|
|
|
|
module.exports = function MonthFromTime(t) {
|
|
var day = DayWithinYear(t);
|
|
if (0 <= day && day < 31) {
|
|
return 0;
|
|
}
|
|
var leap = InLeapYear(t);
|
|
if (31 <= day && day < (59 + leap)) {
|
|
return 1;
|
|
}
|
|
if ((59 + leap) <= day && day < (90 + leap)) {
|
|
return 2;
|
|
}
|
|
if ((90 + leap) <= day && day < (120 + leap)) {
|
|
return 3;
|
|
}
|
|
if ((120 + leap) <= day && day < (151 + leap)) {
|
|
return 4;
|
|
}
|
|
if ((151 + leap) <= day && day < (181 + leap)) {
|
|
return 5;
|
|
}
|
|
if ((181 + leap) <= day && day < (212 + leap)) {
|
|
return 6;
|
|
}
|
|
if ((212 + leap) <= day && day < (243 + leap)) {
|
|
return 7;
|
|
}
|
|
if ((243 + leap) <= day && day < (273 + leap)) {
|
|
return 8;
|
|
}
|
|
if ((273 + leap) <= day && day < (304 + leap)) {
|
|
return 9;
|
|
}
|
|
if ((304 + leap) <= day && day < (334 + leap)) {
|
|
return 10;
|
|
}
|
|
if ((334 + leap) <= day && day < (365 + leap)) {
|
|
return 11;
|
|
}
|
|
};
|