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📁 __pycache__		[ DEL ]
📁 cli		[ DEL ]
📄 __init__.py	1,559 B	[ EDIT ] \| [ DEL ]
📄 big5freq.py	31,254 B	[ EDIT ] \| [ DEL ]
📄 big5prober.py	1,757 B	[ EDIT ] \| [ DEL ]
📄 chardistribution.py	9,411 B	[ EDIT ] \| [ DEL ]
📄 charsetgroupprober.py	3,787 B	[ EDIT ] \| [ DEL ]
📄 charsetprober.py	5,110 B	[ EDIT ] \| [ DEL ]
📄 codingstatemachine.py	3,590 B	[ EDIT ] \| [ DEL ]
📄 compat.py	1,134 B	[ EDIT ] \| [ DEL ]
📄 cp949prober.py	1,855 B	[ EDIT ] \| [ DEL ]
📄 enums.py	1,661 B	[ EDIT ] \| [ DEL ]
📄 escprober.py	3,950 B	[ EDIT ] \| [ DEL ]
📄 escsm.py	10,510 B	[ EDIT ] \| [ DEL ]
📄 eucjpprober.py	3,749 B	[ EDIT ] \| [ DEL ]
📄 euckrfreq.py	13,546 B	[ EDIT ] \| [ DEL ]
📄 euckrprober.py	1,748 B	[ EDIT ] \| [ DEL ]
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📄 euctwprober.py	1,747 B	[ EDIT ] \| [ DEL ]
📄 gb2312freq.py	20,715 B	[ EDIT ] \| [ DEL ]
📄 gb2312prober.py	1,754 B	[ EDIT ] \| [ DEL ]
📄 hebrewprober.py	13,838 B	[ EDIT ] \| [ DEL ]
📄 jisfreq.py	25,777 B	[ EDIT ] \| [ DEL ]
📄 jpcntx.py	19,643 B	[ EDIT ] \| [ DEL ]
📄 langbulgarianmodel.py	12,839 B	[ EDIT ] \| [ DEL ]
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📄 langgreekmodel.py	12,688 B	[ EDIT ] \| [ DEL ]
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📄 langhungarianmodel.py	12,592 B	[ EDIT ] \| [ DEL ]
📄 langthaimodel.py	11,290 B	[ EDIT ] \| [ DEL ]
📄 langturkishmodel.py	11,102 B	[ EDIT ] \| [ DEL ]
📄 latin1prober.py	5,370 B	[ EDIT ] \| [ DEL ]
📄 mbcharsetprober.py	3,413 B	[ EDIT ] \| [ DEL ]
📄 mbcsgroupprober.py	2,012 B	[ EDIT ] \| [ DEL ]
📄 mbcssm.py	25,481 B	[ EDIT ] \| [ DEL ]
📄 sbcharsetprober.py	5,657 B	[ EDIT ] \| [ DEL ]
📄 sbcsgroupprober.py	3,546 B	[ EDIT ] \| [ DEL ]
📄 sjisprober.py	3,774 B	[ EDIT ] \| [ DEL ]
📄 universaldetector.py	12,485 B	[ EDIT ] \| [ DEL ]
📄 utf8prober.py	2,766 B	[ EDIT ] \| [ DEL ]
📄 version.py	242 B	[ EDIT ] \| [ DEL ]

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EDIT: utf8prober.py

######################## BEGIN LICENSE BLOCK ########################
# The Original Code is mozilla.org code.
#
# The Initial Developer of the Original Code is
# Netscape Communications Corporation.
# Portions created by the Initial Developer are Copyright (C) 1998
# the Initial Developer. All Rights Reserved.
#
# Contributor(s):
#   Mark Pilgrim - port to Python
#
# 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
from .codingstatemachine import CodingStateMachine
from .mbcssm import UTF8_SM_MODEL

class UTF8Prober(CharSetProber):
    ONE_CHAR_PROB = 0.5

def __init__(self):
        super(UTF8Prober, self).__init__()
        self.coding_sm = CodingStateMachine(UTF8_SM_MODEL)
        self._num_mb_chars = None
        self.reset()

def reset(self):
        super(UTF8Prober, self).reset()
        self.coding_sm.reset()
        self._num_mb_chars = 0

@property
    def charset_name(self):
        return "utf-8"

@property
    def language(self):
        return ""

def feed(self, byte_str):
        for c in byte_str:
            coding_state = self.coding_sm.next_state(c)
            if coding_state == MachineState.ERROR:
                self._state = ProbingState.NOT_ME
                break
            elif coding_state == MachineState.ITS_ME:
                self._state = ProbingState.FOUND_IT
                break
            elif coding_state == MachineState.START:
                if self.coding_sm.get_current_charlen() >= 2:
                    self._num_mb_chars += 1

if self.state == ProbingState.DETECTING:
            if self.get_confidence() > self.SHORTCUT_THRESHOLD:
                self._state = ProbingState.FOUND_IT

return self.state

def get_confidence(self):
        unlike = 0.99
        if self._num_mb_chars < 6:
            unlike *= self.ONE_CHAR_PROB ** self._num_mb_chars
            return 1.0 - unlike
        else:
            return unlike