diff --git a/filetimes.py b/filetimes.py deleted file mode 100644 index b5fdfd2..0000000 --- a/filetimes.py +++ /dev/null @@ -1,104 +0,0 @@ -# Copyright (c) 2009, David Buxton -# All rights reserved. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions are -# met: -# -# * Redistributions of source code must retain the above copyright -# notice, this list of conditions and the following disclaimer. -# * Redistributions in binary form must reproduce the above copyright -# notice, this list of conditions and the following disclaimer in the -# documentation and/or other materials provided with the distribution. -# -# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS -# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED -# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A -# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED -# TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR -# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF -# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING -# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS -# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -"""Tools to convert between Python datetime instances and Microsoft times. -""" -from datetime import datetime, timedelta, tzinfo -from calendar import timegm - - -# http://support.microsoft.com/kb/167296 -# How To Convert a UNIX time_t to a Win32 FILETIME or SYSTEMTIME -EPOCH_AS_FILETIME = 116444736000000000 # January 1, 1970 as MS file time -HUNDREDS_OF_NANOSECONDS = 10000000 - - -ZERO = timedelta(0) -HOUR = timedelta(hours=1) - - -class UTC(tzinfo): - """UTC""" - def utcoffset(self, dt): - return ZERO - - def tzname(self, dt): - return "UTC" - - def dst(self, dt): - return ZERO - - -utc = UTC() - - -def dt_to_filetime(dt): - """Converts a datetime to Microsoft filetime format. If the object is - time zone-naive, it is forced to UTC before conversion. - - >>> "%.0f" % dt_to_filetime(datetime(2009, 7, 25, 23, 0)) - '128930364000000000' - - >>> "%.0f" % dt_to_filetime(datetime(1970, 1, 1, 0, 0, tzinfo=utc)) - '116444736000000000' - - >>> "%.0f" % dt_to_filetime(datetime(1970, 1, 1, 0, 0)) - '116444736000000000' - - >>> dt_to_filetime(datetime(2009, 7, 25, 23, 0, 0, 100)) - 128930364000001000 - """ - if (dt.tzinfo is None) or (dt.tzinfo.utcoffset(dt) is None): - dt = dt.replace(tzinfo=utc) - ft = EPOCH_AS_FILETIME + (timegm(dt.timetuple()) * HUNDREDS_OF_NANOSECONDS) - return ft + (dt.microsecond * 10) - - -def filetime_to_dt(ft): - """Converts a Microsoft filetime number to a Python datetime. The new - datetime object is time zone-naive but is equivalent to tzinfo=utc. - - >>> filetime_to_dt(116444736000000000) - datetime.datetime(1970, 1, 1, 0, 0) - - >>> filetime_to_dt(128930364000000000) - datetime.datetime(2009, 7, 25, 23, 0) - - >>> filetime_to_dt(128930364000001000) - datetime.datetime(2009, 7, 25, 23, 0, 0, 100) - """ - # Get seconds and remainder in terms of Unix epoch - (s, ns100) = divmod(ft - EPOCH_AS_FILETIME, HUNDREDS_OF_NANOSECONDS) - # Convert to datetime object - dt = datetime.utcfromtimestamp(s) - # Add remainder in as microseconds. Python 3.2 requires an integer - dt = dt.replace(microsecond=(ns100 // 10)) - return dt - - -if __name__ == "__main__": - import doctest - - doctest.testmod() -