codekingpro/portable-devtools

1"""2    babel.localtime._fallback3    ~~~~~~~~~~~~~~~~~~~~~~~~~4 5    Emulated fallback local timezone when all else fails.6 7    :copyright: (c) 2013-2024 by the Babel Team.8    :license: BSD, see LICENSE for more details.9"""10 11import datetime12import time13 14STDOFFSET = datetime.timedelta(seconds=-time.timezone)15DSTOFFSET = datetime.timedelta(seconds=-time.altzone) if time.daylight else STDOFFSET16 17DSTDIFF = DSTOFFSET - STDOFFSET18ZERO = datetime.timedelta(0)19 20 21class _FallbackLocalTimezone(datetime.tzinfo):22 23    def utcoffset(self, dt: datetime.datetime) -> datetime.timedelta:24        if self._isdst(dt):25            return DSTOFFSET26        else:27            return STDOFFSET28 29    def dst(self, dt: datetime.datetime) -> datetime.timedelta:30        if self._isdst(dt):31            return DSTDIFF32        else:33            return ZERO34 35    def tzname(self, dt: datetime.datetime) -> str:36        return time.tzname[self._isdst(dt)]37 38    def _isdst(self, dt: datetime.datetime) -> bool:39        tt = (dt.year, dt.month, dt.day,40              dt.hour, dt.minute, dt.second,41              dt.weekday(), 0, -1)42        stamp = time.mktime(tt)43        tt = time.localtime(stamp)44        return tt.tm_isdst > 045