mirror of
https://github.com/SickGear/SickGear.git
synced 2024-11-25 06:15:04 +00:00
57 lines
1.8 KiB
Python
57 lines
1.8 KiB
Python
#!/usr/bin/env python2
|
|
# -*- coding: utf-8 -*-
|
|
#
|
|
# GuessIt - A library for guessing information from filenames
|
|
# Copyright (c) 2011 Nicolas Wack <wackou@gmail.com>
|
|
#
|
|
# GuessIt is free software; you can redistribute it and/or modify it under
|
|
# the terms of the Lesser GNU General Public License as published by
|
|
# the Free Software Foundation; either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# GuessIt is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# Lesser GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the Lesser GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
#
|
|
|
|
from __future__ import unicode_literals
|
|
import struct
|
|
import os
|
|
|
|
|
|
def hash_file(filename):
|
|
"""This function is taken from:
|
|
http://trac.opensubtitles.org/projects/opensubtitles/wiki/HashSourceCodes
|
|
and is licensed under the GPL."""
|
|
|
|
longlongformat = 'q' # long long
|
|
bytesize = struct.calcsize(longlongformat)
|
|
|
|
f = open(filename, "rb")
|
|
|
|
filesize = os.path.getsize(filename)
|
|
hash_value = filesize
|
|
|
|
if filesize < 65536 * 2:
|
|
raise Exception("SizeError: size is %d, should be > 132K..." % filesize)
|
|
|
|
for x in range(65536 / bytesize):
|
|
buf = f.read(bytesize)
|
|
(l_value,) = struct.unpack(longlongformat, buf)
|
|
hash_value += l_value
|
|
hash_value = hash_value & 0xFFFFFFFFFFFFFFFF #to remain as 64bit number
|
|
|
|
f.seek(max(0, filesize - 65536), 0)
|
|
for x in range(65536 / bytesize):
|
|
buf = f.read(bytesize)
|
|
(l_value,) = struct.unpack(longlongformat, buf)
|
|
hash_value += l_value
|
|
hash_value = hash_value & 0xFFFFFFFFFFFFFFFF
|
|
|
|
f.close()
|
|
|
|
return "%016x" % hash_value
|