/usr/lib/python3/dist-packages/dateutil/tzwin.py is in python3-dateutil 2.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 | # This code was originally contributed by Jeffrey Harris.
import datetime
import struct
import winreg
__all__ = ["tzwin", "tzwinlocal"]
ONEWEEK = datetime.timedelta(7)
TZKEYNAMENT = r"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones"
TZKEYNAME9X = r"SOFTWARE\Microsoft\Windows\CurrentVersion\Time Zones"
TZLOCALKEYNAME = r"SYSTEM\CurrentControlSet\Control\TimeZoneInformation"
def _settzkeyname():
global TZKEYNAME
handle = winreg.ConnectRegistry(None, winreg.HKEY_LOCAL_MACHINE)
try:
winreg.OpenKey(handle, TZKEYNAMENT).Close()
TZKEYNAME = TZKEYNAMENT
except WindowsError:
TZKEYNAME = TZKEYNAME9X
handle.Close()
_settzkeyname()
class tzwinbase(datetime.tzinfo):
"""tzinfo class based on win32's timezones available in the registry."""
def utcoffset(self, dt):
if self._isdst(dt):
return datetime.timedelta(minutes=self._dstoffset)
else:
return datetime.timedelta(minutes=self._stdoffset)
def dst(self, dt):
if self._isdst(dt):
minutes = self._dstoffset - self._stdoffset
return datetime.timedelta(minutes=minutes)
else:
return datetime.timedelta(0)
def tzname(self, dt):
if self._isdst(dt):
return self._dstname
else:
return self._stdname
def list():
"""Return a list of all time zones known to the system."""
handle = winreg.ConnectRegistry(None, winreg.HKEY_LOCAL_MACHINE)
tzkey = winreg.OpenKey(handle, TZKEYNAME)
result = [winreg.EnumKey(tzkey, i)
for i in range(winreg.QueryInfoKey(tzkey)[0])]
tzkey.Close()
handle.Close()
return result
list = staticmethod(list)
def display(self):
return self._display
def _isdst(self, dt):
dston = picknthweekday(dt.year, self._dstmonth, self._dstdayofweek,
self._dsthour, self._dstminute,
self._dstweeknumber)
dstoff = picknthweekday(dt.year, self._stdmonth, self._stddayofweek,
self._stdhour, self._stdminute,
self._stdweeknumber)
if dston < dstoff:
return dston <= dt.replace(tzinfo=None) < dstoff
else:
return not dstoff <= dt.replace(tzinfo=None) < dston
class tzwin(tzwinbase):
def __init__(self, name):
self._name = name
handle = winreg.ConnectRegistry(None, winreg.HKEY_LOCAL_MACHINE)
tzkey = winreg.OpenKey(handle, "%s\%s" % (TZKEYNAME, name))
keydict = valuestodict(tzkey)
tzkey.Close()
handle.Close()
self._stdname = keydict["Std"].encode("iso-8859-1")
self._dstname = keydict["Dlt"].encode("iso-8859-1")
self._display = keydict["Display"]
# See http://ww_winreg.jsiinc.com/SUBA/tip0300/rh0398.htm
tup = struct.unpack("=3l16h", keydict["TZI"])
self._stdoffset = -tup[0]-tup[1] # Bias + StandardBias * -1
self._dstoffset = self._stdoffset-tup[2] # + DaylightBias * -1
(self._stdmonth,
self._stddayofweek, # Sunday = 0
self._stdweeknumber, # Last = 5
self._stdhour,
self._stdminute) = tup[4:9]
(self._dstmonth,
self._dstdayofweek, # Sunday = 0
self._dstweeknumber, # Last = 5
self._dsthour,
self._dstminute) = tup[12:17]
def __repr__(self):
return "tzwin(%s)" % repr(self._name)
def __reduce__(self):
return (self.__class__, (self._name,))
class tzwinlocal(tzwinbase):
def __init__(self):
handle = winreg.ConnectRegistry(None, winreg.HKEY_LOCAL_MACHINE)
tzlocalkey = winreg.OpenKey(handle, TZLOCALKEYNAME)
keydict = valuestodict(tzlocalkey)
tzlocalkey.Close()
self._stdname = keydict["StandardName"].encode("iso-8859-1")
self._dstname = keydict["DaylightName"].encode("iso-8859-1")
try:
tzkey = winreg.OpenKey(handle, "%s\%s"%(TZKEYNAME, self._stdname))
_keydict = valuestodict(tzkey)
self._display = _keydict["Display"]
tzkey.Close()
except OSError:
self._display = None
handle.Close()
self._stdoffset = -keydict["Bias"]-keydict["StandardBias"]
self._dstoffset = self._stdoffset-keydict["DaylightBias"]
# See http://ww_winreg.jsiinc.com/SUBA/tip0300/rh0398.htm
tup = struct.unpack("=8h", keydict["StandardStart"])
(self._stdmonth,
self._stddayofweek, # Sunday = 0
self._stdweeknumber, # Last = 5
self._stdhour,
self._stdminute) = tup[1:6]
tup = struct.unpack("=8h", keydict["DaylightStart"])
(self._dstmonth,
self._dstdayofweek, # Sunday = 0
self._dstweeknumber, # Last = 5
self._dsthour,
self._dstminute) = tup[1:6]
def __reduce__(self):
return (self.__class__, ())
def picknthweekday(year, month, dayofweek, hour, minute, whichweek):
"""dayofweek == 0 means Sunday, whichweek 5 means last instance"""
first = datetime.datetime(year, month, 1, hour, minute)
weekdayone = first.replace(day=((dayofweek-first.isoweekday())%7+1))
for n in range(whichweek):
dt = weekdayone+(whichweek-n)*ONEWEEK
if dt.month == month:
return dt
def valuestodict(key):
"""Convert a registry key's values to a dictionary."""
dict = {}
size = winreg.QueryInfoKey(key)[1]
for i in range(size):
data = winreg.EnumValue(key, i)
dict[data[0]] = data[1]
return dict
|