/usr/share/pyshared/vobject/win32tz.py is in python-vobject 0.8.1c-4.
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 | import _winreg
import struct
import datetime
handle=_winreg.ConnectRegistry(None, _winreg.HKEY_LOCAL_MACHINE)
tzparent=_winreg.OpenKey(handle,
"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Time Zones")
parentsize=_winreg.QueryInfoKey(tzparent)[0]
localkey=_winreg.OpenKey(handle,
"SYSTEM\\CurrentControlSet\\Control\\TimeZoneInformation")
WEEKS=datetime.timedelta(7)
def list_timezones():
"""Return a list of all time zones known to the system."""
l=[]
for i in xrange(parentsize):
l.append(_winreg.EnumKey(tzparent, i))
return l
class win32tz(datetime.tzinfo):
"""tzinfo class based on win32's timezones available in the registry.
>>> local = win32tz('Central Standard Time')
>>> oct1 = datetime.datetime(month=10, year=2004, day=1, tzinfo=local)
>>> dec1 = datetime.datetime(month=12, year=2004, day=1, tzinfo=local)
>>> oct1.dst()
datetime.timedelta(0, 3600)
>>> dec1.dst()
datetime.timedelta(0)
>>> braz = win32tz('E. South America Standard Time')
>>> braz.dst(oct1)
datetime.timedelta(0)
>>> braz.dst(dec1)
datetime.timedelta(0, 3600)
"""
def __init__(self, name):
self.data=win32tz_data(name)
def utcoffset(self, dt):
if self._isdst(dt):
return datetime.timedelta(minutes=self.data.dstoffset)
else:
return datetime.timedelta(minutes=self.data.stdoffset)
def dst(self, dt):
if self._isdst(dt):
minutes = self.data.dstoffset - self.data.stdoffset
return datetime.timedelta(minutes=minutes)
else:
return datetime.timedelta(0)
def tzname(self, dt):
if self._isdst(dt): return self.data.dstname
else: return self.data.stdname
def _isdst(self, dt):
dat=self.data
dston = pickNthWeekday(dt.year, dat.dstmonth, dat.dstdayofweek,
dat.dsthour, dat.dstminute, dat.dstweeknumber)
dstoff = pickNthWeekday(dt.year, dat.stdmonth, dat.stddayofweek,
dat.stdhour, dat.stdminute, dat.stdweeknumber)
if dston < dstoff:
if dston <= dt.replace(tzinfo=None) < dstoff: return True
else: return False
else:
if dstoff <= dt.replace(tzinfo=None) < dston: return False
else: return True
def __repr__(self):
return "<win32tz - %s>" % self.data.display
def pickNthWeekday(year, month, dayofweek, hour, minute, whichweek):
"""dayofweek == 0 means Sunday, whichweek > 4 means last instance"""
first = datetime.datetime(year=year, month=month, hour=hour, minute=minute,
day=1)
weekdayone = first.replace(day=((dayofweek - first.isoweekday()) % 7 + 1))
for n in xrange(whichweek - 1, -1, -1):
dt=weekdayone + n * WEEKS
if dt.month == month: return dt
class win32tz_data(object):
"""Read a registry key for a timezone, expose its contents."""
def __init__(self, path):
"""Load path, or if path is empty, load local time."""
if path:
keydict=valuesToDict(_winreg.OpenKey(tzparent, path))
self.display = keydict['Display']
self.dstname = keydict['Dlt']
self.stdname = keydict['Std']
#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
offset=3
self.stdmonth = tup[1 + offset]
self.stddayofweek = tup[2 + offset] #Sunday=0
self.stdweeknumber = tup[3 + offset] #Last = 5
self.stdhour = tup[4 + offset]
self.stdminute = tup[5 + offset]
offset=11
self.dstmonth = tup[1 + offset]
self.dstdayofweek = tup[2 + offset] #Sunday=0
self.dstweeknumber = tup[3 + offset] #Last = 5
self.dsthour = tup[4 + offset]
self.dstminute = tup[5 + offset]
else:
keydict=valuesToDict(localkey)
self.stdname = keydict['StandardName']
self.dstname = keydict['DaylightName']
sourcekey=_winreg.OpenKey(tzparent, self.stdname)
self.display = valuesToDict(sourcekey)['Display']
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'])
offset=0
self.stdmonth = tup[1 + offset]
self.stddayofweek = tup[2 + offset] #Sunday=0
self.stdweeknumber = tup[3 + offset] #Last = 5
self.stdhour = tup[4 + offset]
self.stdminute = tup[5 + offset]
tup = struct.unpack('=8h', keydict['DaylightStart'])
self.dstmonth = tup[1 + offset]
self.dstdayofweek = tup[2 + offset] #Sunday=0
self.dstweeknumber = tup[3 + offset] #Last = 5
self.dsthour = tup[4 + offset]
self.dstminute = tup[5 + offset]
def valuesToDict(key):
"""Convert a registry key's values to a dictionary."""
dict={}
size=_winreg.QueryInfoKey(key)[1]
for i in xrange(size):
dict[_winreg.EnumValue(key, i)[0]]=_winreg.EnumValue(key, i)[1]
return dict
def _test():
import win32tz, doctest
doctest.testmod(win32tz, verbose=0)
if __name__ == '__main__':
_test()
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