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[FILE] big5freq.py [ edit | delete | rename ]
[FILE] big5prober.py [ edit | delete | rename ]
[FILE] chardistribution.py [ edit | delete | rename ]
[FILE] charsetgroupprober.py [ edit | delete | rename ]
[FILE] charsetprober.py [ edit | delete | rename ]
[FILE] codingstatemachine.py [ edit | delete | rename ]
[FILE] compat.py [ edit | delete | rename ]
[FILE] cp949prober.py [ edit | delete | rename ]
[FILE] enums.py [ edit | delete | rename ]
[FILE] escprober.py [ edit | delete | rename ]
[FILE] escsm.py [ edit | delete | rename ]
[FILE] eucjpprober.py [ edit | delete | rename ]
[FILE] euckrfreq.py [ edit | delete | rename ]
[FILE] euckrprober.py [ edit | delete | rename ]
[FILE] euctwfreq.py [ edit | delete | rename ]
[FILE] euctwprober.py [ edit | delete | rename ]
[FILE] gb2312freq.py [ edit | delete | rename ]
[FILE] gb2312prober.py [ edit | delete | rename ]
[FILE] hebrewprober.py [ edit | delete | rename ]
[FILE] jisfreq.py [ edit | delete | rename ]
[FILE] jpcntx.py [ edit | delete | rename ]
[FILE] langbulgarianmodel.py [ edit | delete | rename ]
[FILE] langgreekmodel.py [ edit | delete | rename ]
[FILE] langhebrewmodel.py [ edit | delete | rename ]
[FILE] langhungarianmodel.py [ edit | delete | rename ]
[FILE] langrussianmodel.py [ edit | delete | rename ]
[FILE] langthaimodel.py [ edit | delete | rename ]
[FILE] langturkishmodel.py [ edit | delete | rename ]
[FILE] latin1prober.py [ edit | delete | rename ]
[FILE] mbcharsetprober.py [ edit | delete | rename ]
[FILE] mbcsgroupprober.py [ edit | delete | rename ]
[FILE] mbcssm.py [ edit | delete | rename ]
[FILE] sbcharsetprober.py [ edit | delete | rename ]
[FILE] sbcsgroupprober.py [ edit | delete | rename ]
[FILE] sjisprober.py [ edit | delete | rename ]
[FILE] universaldetector.py [ edit | delete | rename ]
[FILE] utf8prober.py [ edit | delete | rename ]
[FILE] version.py [ edit | delete | rename ]
[FILE] __init__.py [ edit | delete | rename ]
Viewing: /snap/core22/2955/usr/lib/python3/dist-packages/chardet/mbcharsetprober.py
######################## BEGIN LICENSE BLOCK ########################
# The Original Code is Mozilla Universal charset detector code.
#
# The Initial Developer of the Original Code is
# Netscape Communications Corporation.
# Portions created by the Initial Developer are Copyright (C) 2001
# the Initial Developer. All Rights Reserved.
#
# Contributor(s):
# Mark Pilgrim - port to Python
# Shy Shalom - original C code
# Proofpoint, Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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 GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
# 02110-1301 USA
######################### END LICENSE BLOCK #########################
from .charsetprober import CharSetProber
from .enums import ProbingState, MachineState
class MultiByteCharSetProber(CharSetProber):
"""
MultiByteCharSetProber
"""
def __init__(self, lang_filter=None):
super(MultiByteCharSetProber, self).__init__(lang_filter=lang_filter)
self.distribution_analyzer = None
self.coding_sm = None
self._last_char = [0, 0]
def reset(self):
super(MultiByteCharSetProber, self).reset()
if self.coding_sm:
self.coding_sm.reset()
if self.distribution_analyzer:
self.distribution_analyzer.reset()
self._last_char = [0, 0]
@property
def charset_name(self):
raise NotImplementedError
@property
def language(self):
raise NotImplementedError
def feed(self, byte_str):
for i in range(len(byte_str)):
coding_state = self.coding_sm.next_state(byte_str[i])
if coding_state == MachineState.ERROR:
self.logger.debug('%s %s prober hit error at byte %s',
self.charset_name, self.language, i)
self._state = ProbingState.NOT_ME
break
elif coding_state == MachineState.ITS_ME:
self._state = ProbingState.FOUND_IT
break
elif coding_state == MachineState.START:
char_len = self.coding_sm.get_current_charlen()
if i == 0:
self._last_char[1] = byte_str[0]
self.distribution_analyzer.feed(self._last_char, char_len)
else:
self.distribution_analyzer.feed(byte_str[i - 1:i + 1],
char_len)
self._last_char[0] = byte_str[-1]
if self.state == ProbingState.DETECTING:
if (self.distribution_analyzer.got_enough_data() and
(self.get_confidence() > self.SHORTCUT_THRESHOLD)):
self._state = ProbingState.FOUND_IT
return self.state
def get_confidence(self):
return self.distribution_analyzer.get_confidence()