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######################## 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
| Name | Type | Size | Permission | Actions |
|---|---|---|---|---|
| __pycache__ | Folder | 0755 |
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| cli | Folder | 0755 |
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| metadata | Folder | 0755 |
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| __init__.py | File | 3.19 KB | 0644 |
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| big5freq.py | File | 30.52 KB | 0644 |
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| big5prober.py | File | 1.72 KB | 0644 |
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| chardistribution.py | File | 9.19 KB | 0644 |
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| charsetgroupprober.py | File | 3.75 KB | 0644 |
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| charsetprober.py | File | 4.99 KB | 0644 |
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| codingstatemachine.py | File | 3.51 KB | 0644 |
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| compat.py | File | 1.17 KB | 0644 |
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| cp949prober.py | File | 1.81 KB | 0644 |
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| enums.py | File | 1.62 KB | 0644 |
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| escprober.py | File | 3.86 KB | 0644 |
|
| escsm.py | File | 10.26 KB | 0644 |
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| eucjpprober.py | File | 3.66 KB | 0644 |
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| euckrfreq.py | File | 13.23 KB | 0644 |
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| euckrprober.py | File | 1.71 KB | 0644 |
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| euctwfreq.py | File | 30.88 KB | 0644 |
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| euctwprober.py | File | 1.71 KB | 0644 |
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| gb2312freq.py | File | 20.23 KB | 0644 |
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| gb2312prober.py | File | 1.71 KB | 0644 |
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| hebrewprober.py | File | 13.51 KB | 0644 |
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| jisfreq.py | File | 25.17 KB | 0644 |
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| jpcntx.py | File | 19.18 KB | 0644 |
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| langbulgarianmodel.py | File | 103.21 KB | 0644 |
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| langgreekmodel.py | File | 97.23 KB | 0644 |
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| langhebrewmodel.py | File | 96.45 KB | 0644 |
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| langhungarianmodel.py | File | 100.08 KB | 0644 |
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| langrussianmodel.py | File | 128.09 KB | 0644 |
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| langthaimodel.py | File | 100.88 KB | 0644 |
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| langturkishmodel.py | File | 93.69 KB | 0644 |
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| latin1prober.py | File | 5.24 KB | 0644 |
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| mbcharsetprober.py | File | 3.33 KB | 0644 |
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| mbcsgroupprober.py | File | 1.96 KB | 0644 |
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| mbcssm.py | File | 24.88 KB | 0644 |
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| sbcharsetprober.py | File | 5.99 KB | 0644 |
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| sbcsgroupprober.py | File | 4.21 KB | 0644 |
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| sjisprober.py | File | 3.69 KB | 0644 |
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| universaldetector.py | File | 12.21 KB | 0644 |
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| utf8prober.py | File | 2.7 KB | 0644 |
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| version.py | File | 242 B | 0644 |
|