Opa_omroep-automatiseren/venv/lib/python3.8/site-packages/convertdate/ordinal.py
Eljakim Herrewijnen f26bbbf103 initial
2020-12-27 21:00:11 +01:00

51 lines
1.1 KiB
Python

# -*- coding: utf-8 -*-
# This file is part of convertdate.
# http://github.com/fitnr/convertdate
# Licensed under the MIT license:
# http://opensource.org/licenses/MIT
# Copyright (c) 2016, fitnr <fitnr@fakeisthenewreal>
from math import trunc
from calendar import isleap
from . import gregorian
def to_jd(year, dayofyear):
'''Return Julian day count of given ISO year, and day of year'''
return gregorian.to_jd(year, 1, 1) + dayofyear - 1
def from_jd(jd):
return from_gregorian(*gregorian.from_jd(jd))
def from_gregorian(year, month, day):
m = month + 1
if m <= 3:
m = m + 12
leap = isleap(year)
t = (trunc(30.6 * m) + day - 122 + 59 + leap) % (365 + leap)
return year, t
def to_gregorian(year, dayofyear):
leap = isleap(year)
if dayofyear < 59 + leap:
leap_adj = 0
elif leap:
leap_adj = 1
else:
leap_adj = 2
month = trunc((((dayofyear - 1 + leap_adj) * 12) + 373) / 367)
startofmonth = from_gregorian(year, month, 1)
return year, month, dayofyear - startofmonth[1] + 1