1"""fontTools.misc.timeTools.py -- tools for working with OpenType timestamps. 2""" 3 4from __future__ import print_function, division, absolute_import 5from fontTools.misc.py23 import * 6import os 7import time 8import calendar 9 10 11epoch_diff = calendar.timegm((1904, 1, 1, 0, 0, 0, 0, 0, 0)) 12 13DAYNAMES = ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"] 14MONTHNAMES = [None, "Jan", "Feb", "Mar", "Apr", "May", "Jun", 15 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"] 16 17 18def asctime(t=None): 19 """ 20 Convert a tuple or struct_time representing a time as returned by gmtime() 21 or localtime() to a 24-character string of the following form: 22 23 >>> asctime(time.gmtime(0)) 24 'Thu Jan 1 00:00:00 1970' 25 26 If t is not provided, the current time as returned by localtime() is used. 27 Locale information is not used by asctime(). 28 29 This is meant to normalise the output of the built-in time.asctime() across 30 different platforms and Python versions. 31 In Python 3.x, the day of the month is right-justified, whereas on Windows 32 Python 2.7 it is padded with zeros. 33 34 See https://github.com/fonttools/fonttools/issues/455 35 """ 36 if t is None: 37 t = time.localtime() 38 s = "%s %s %2s %s" % ( 39 DAYNAMES[t.tm_wday], MONTHNAMES[t.tm_mon], t.tm_mday, 40 time.strftime("%H:%M:%S %Y", t)) 41 return s 42 43 44def timestampToString(value): 45 return asctime(time.gmtime(max(0, value + epoch_diff))) 46 47def timestampFromString(value): 48 return calendar.timegm(time.strptime(value)) - epoch_diff 49 50def timestampNow(): 51 # https://reproducible-builds.org/specs/source-date-epoch/ 52 source_date_epoch = os.environ.get("SOURCE_DATE_EPOCH") 53 if source_date_epoch is not None: 54 return int(source_date_epoch) - epoch_diff 55 return int(time.time() - epoch_diff) 56 57def timestampSinceEpoch(value): 58 return int(value - epoch_diff) 59 60 61if __name__ == "__main__": 62 import sys 63 import doctest 64 sys.exit(doctest.testmod().failed) 65