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# Copyright (C) 2005, 2006, 2007 Canonical Ltd
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# Copyright (C) 2007, 2008, 2009, 2011 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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from __future__ import absolute_import
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from bzrlib import osutils
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:param date: A date formated by format_highres_date
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>>> import time, random
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>>> unpack_highres_date('Thu 2005-06-30 12:38:52.350850105 -0500')
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(1120153132.3508501, -18000)
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>>> unpack_highres_date('Thu 2005-06-30 17:38:52.350850105 +0000')
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(1120153132.3508501, 0)
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>>> unpack_highres_date('Thu 2005-06-30 19:38:52.350850105 +0200')
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(1120153132.3508501, 7200)
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>>> unpack_highres_date('Sun 2006-07-09 12:35:38.867522001 +0530')
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(1152428738.867522, 19800)
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>>> from bzrlib.osutils import local_time_offset
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>>> o = local_time_offset()
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>>> t2, o2 = unpack_highres_date(format_highres_date(t, o))
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>>> t -= 24*3600*365*2 # Start 2 years ago
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>>> for count in xrange(500):
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... t += random.random()*24*3600*30
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... o = ((o/3600 + 13) % 25 - 12)*3600 # Add 1 wrap around from [-12, 12]
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... date = format_highres_date(t, o)
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... t2, o2 = unpack_highres_date(date)
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... if t != t2 or o != o2:
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... print 'Failed on date %r, %s,%s diff:%s' % (date, t, o, t2-t)
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# Weekday parsing is locale sensitive, so drop the weekday
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space_loc = date.find(' ')
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if offset % 60 != 0:
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raise ValueError(
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"can't represent timezone %s offset by fractional minutes" % offset)
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# so that we don't need to do calculations on pre-epoch times,
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# so that we don't need to do calculations on pre-epoch times,
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# which doesn't work with win32 python gmtime, we always
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# give the epoch in utc
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date_fmt='%Y-%m-%d %H:%M:%S')
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# Format for patch dates: %Y-%m-%d %H:%M:%S [+-]%H%M
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# Groups: 1 = %Y-%m-%d %H:%M:%S; 2 = [+-]%H; 3 = %M
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RE_PATCHDATE = re.compile("(\d+-\d+-\d+\s+\d+:\d+:\d+)\s*([+-]\d\d)(\d\d)$")
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RE_PATCHDATE_NOOFFSET = re.compile("\d+-\d+-\d+\s+\d+:\d+:\d+$")
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def parse_patch_date(date_str):
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"""Parse a patch-style date into a POSIX timestamp and offset.
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Inverse of format_patch_date.
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secs_str = date_str[:-6]
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offset_str = date_str[-5:]
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if len(offset_str) != 5:
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"invalid timezone %r" % offset_str)
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offset_hours, offset_mins = offset_str[:3], offset_str[3:]
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offset = int(offset_hours) * 3600 + int(offset_mins) * 60
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match = RE_PATCHDATE.match(date_str)
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if RE_PATCHDATE_NOOFFSET.match(date_str) is not None:
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raise ValueError("time data %r is missing a timezone offset"
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raise ValueError("time data %r does not match format " % date_str
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+ "'%Y-%m-%d %H:%M:%S %z'")
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secs_str = match.group(1)
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offset_hours, offset_mins = int(match.group(2)), int(match.group(3))
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if abs(offset_hours) >= 24 or offset_mins >= 60:
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raise ValueError("invalid timezone %r" %
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(match.group(2) + match.group(3)))
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offset = offset_hours * 3600 + offset_mins * 60
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tm_time = time.strptime(secs_str, '%Y-%m-%d %H:%M:%S')
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# adjust seconds according to offset before converting to POSIX
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# timestamp, to avoid edge problems