/usr/lib/python2.7/dist-packages/persistent/timestamp.py is in python-persistent 4.0.8-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# Copyright (c) 2011 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
__all__ = ('TimeStamp',)
import datetime
import math
import struct
import sys
from persistent._compat import _native
_RAWTYPE = bytes
def _makeOctets(s):
if sys.version_info < (3,):
return bytes(s)
return bytes(s, 'ascii') #pragma NO COVERAGE
_ZERO = _makeOctets('\x00' * 8)
class _UTC(datetime.tzinfo):
def tzname(self):
return 'UTC'
def utcoffset(self, when):
return datetime.timedelta(0, 0, 0)
def dst(self):
return 0
def fromutc(self, dt):
return dt
def _makeUTC(y, mo, d, h, mi, s):
usec, sec = math.modf(s)
sec = int(sec)
usec = int(usec * 1e6)
return datetime.datetime(y, mo, d, h, mi, sec, usec, tzinfo=_UTC())
_EPOCH = _makeUTC(1970, 1, 1, 0, 0, 0)
_SCONV = 60.0 / (1<<16) / (1<<16)
def _makeRaw(year, month, day, hour, minute, second):
a = (((year - 1900) * 12 + month - 1) * 31 + day - 1)
a = (a * 24 + hour) * 60 + minute
b = int(round(second / _SCONV))
return struct.pack('>II', a, b)
def _parseRaw(octets):
a, b = struct.unpack('>II', octets)
minute = a % 60
hour = a // 60 % 24
day = a // (60 * 24) % 31 + 1
month = a // (60 * 24 * 31) % 12 + 1
year = a // (60 * 24 * 31 * 12) + 1900
second = round(b * _SCONV, 6) #microsecond precision
return (year, month, day, hour, minute, second)
class pyTimeStamp(object):
__slots__ = ('_raw', '_elements')
def __init__(self, *args):
if len(args) == 1:
raw = args[0]
if not isinstance(raw, _RAWTYPE):
raise TypeError('Raw octets must be of type: %s' % _RAWTYPE)
if len(raw) != 8:
raise TypeError('Raw must be 8 octets')
self._raw = raw
self._elements = _parseRaw(raw)
elif len(args) == 6:
self._raw = _makeRaw(*args)
self._elements = args
else:
raise TypeError('Pass either a single 8-octet arg '
'or 5 integers and a float')
def raw(self):
return self._raw
def __repr__(self):
return repr(self._raw)
def year(self):
return self._elements[0]
def month(self):
return self._elements[1]
def day(self):
return self._elements[2]
def hour(self):
return self._elements[3]
def minute(self):
return self._elements[4]
def second(self):
return self._elements[5]
def timeTime(self):
""" -> seconds since epoch, as a float.
"""
delta = _makeUTC(*self._elements) - _EPOCH
return delta.days * 86400.0 + delta.seconds
def laterThan(self, other):
""" Return a timestamp instance which is later than 'other'.
If self already qualifies, return self.
Otherwise, return a new instance one moment later than 'other'.
"""
if not isinstance(other, self.__class__):
raise ValueError()
if self._raw > other._raw:
return self
a, b = struct.unpack('>II', other._raw)
later = struct.pack('>II', a, b + 1)
return self.__class__(later)
try:
from persistent._timestamp import TimeStamp
except ImportError: #pragma NO COVER
TimeStamp = pyTimeStamp
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