89 lines
2.2 KiB
Python
89 lines
2.2 KiB
Python
"""fontTools.misc.timeTools.py -- tools for working with OpenType timestamps.
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"""
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import os
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import time
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from datetime import datetime, timezone
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import calendar
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epoch_diff = calendar.timegm((1904, 1, 1, 0, 0, 0, 0, 0, 0))
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DAYNAMES = ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"]
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MONTHNAMES = [
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None,
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"Jan",
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"Feb",
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"Mar",
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"Apr",
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"May",
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"Jun",
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"Jul",
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"Aug",
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"Sep",
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"Oct",
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"Nov",
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"Dec",
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]
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def asctime(t=None):
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"""
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Convert a tuple or struct_time representing a time as returned by gmtime()
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or localtime() to a 24-character string of the following form:
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>>> asctime(time.gmtime(0))
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'Thu Jan 1 00:00:00 1970'
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If t is not provided, the current time as returned by localtime() is used.
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Locale information is not used by asctime().
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This is meant to normalise the output of the built-in time.asctime() across
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different platforms and Python versions.
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In Python 3.x, the day of the month is right-justified, whereas on Windows
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Python 2.7 it is padded with zeros.
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See https://github.com/fonttools/fonttools/issues/455
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"""
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if t is None:
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t = time.localtime()
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s = "%s %s %2s %s" % (
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DAYNAMES[t.tm_wday],
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MONTHNAMES[t.tm_mon],
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t.tm_mday,
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time.strftime("%H:%M:%S %Y", t),
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)
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return s
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def timestampToString(value):
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return asctime(time.gmtime(max(0, value + epoch_diff)))
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def timestampFromString(value):
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wkday, mnth = value[:7].split()
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t = datetime.strptime(value[7:], " %d %H:%M:%S %Y")
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t = t.replace(month=MONTHNAMES.index(mnth), tzinfo=timezone.utc)
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wkday_idx = DAYNAMES.index(wkday)
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assert t.weekday() == wkday_idx, '"' + value + '" has inconsistent weekday'
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return int(t.timestamp()) - epoch_diff
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def timestampNow():
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# https://reproducible-builds.org/specs/source-date-epoch/
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source_date_epoch = os.environ.get("SOURCE_DATE_EPOCH")
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if source_date_epoch is not None:
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return int(source_date_epoch) - epoch_diff
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return int(time.time() - epoch_diff)
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def timestampSinceEpoch(value):
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return int(value - epoch_diff)
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if __name__ == "__main__":
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import sys
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import doctest
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sys.exit(doctest.testmod().failed)
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