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/lib/python3.6/site-packages/chardet/eucjpprober.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 .enums import ProbingState, MachineState
from .mbcharsetprober import MultiByteCharSetProber
from .codingstatemachine import CodingStateMachine
from .chardistribution import EUCJPDistributionAnalysis
from .jpcntx import EUCJPContextAnalysis
from .mbcssm import EUCJP_SM_MODEL


class EUCJPProber(MultiByteCharSetProber):
    def __init__(self):
        super(EUCJPProber, self).__init__()
        self.coding_sm = CodingStateMachine(EUCJP_SM_MODEL)
        self.distribution_analyzer = EUCJPDistributionAnalysis()
        self.context_analyzer = EUCJPContextAnalysis()
        self.reset()

    def reset(self):
        super(EUCJPProber, self).reset()
        self.context_analyzer.reset()

    @property
    def charset_name(self):
        return "EUC-JP"

    @property
    def language(self):
        return "Japanese"

    def feed(self, byte_str):
        for i in range(len(byte_str)):
            # PY3K: byte_str is a byte array, so byte_str[i] is an int, not a byte
            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.context_analyzer.feed(self._last_char, char_len)
                    self.distribution_analyzer.feed(self._last_char, char_len)
                else:
                    self.context_analyzer.feed(byte_str[i - 1:i + 1],
                                                char_len)
                    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.context_analyzer.got_enough_data() and
               (self.get_confidence() > self.SHORTCUT_THRESHOLD)):
                self._state = ProbingState.FOUND_IT

        return self.state

    def get_confidence(self):
        context_conf = self.context_analyzer.get_confidence()
        distrib_conf = self.distribution_analyzer.get_confidence()
        return max(context_conf, distrib_conf)

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big5freq.py	30.52 KB	lrw-r--r--	2017-04-11 17:51:33	Edit Download recursive recursive
big5prober.py	1.72 KB	lrw-r--r--	2017-04-11 17:51:33	Edit Download recursive recursive
chardistribution.py	9.19 KB	lrw-r--r--	2017-04-11 19:52:09	Edit Download recursive recursive
charsetgroupprober.py	3.70 KB	lrw-r--r--	2017-04-11 17:51:33	Edit Download recursive recursive
charsetprober.py	4.99 KB	lrw-r--r--	2017-06-08 14:21:53	Edit Download recursive recursive
codingstatemachine.py	3.51 KB	lrw-r--r--	2017-04-11 17:51:33	Edit Download recursive recursive
compat.py	1.11 KB	lrw-r--r--	2017-06-08 14:32:38	Edit Download recursive recursive
cp949prober.py	1.81 KB	lrw-r--r--	2017-04-11 17:51:33	Edit Download recursive recursive
enums.py	1.62 KB	lrw-r--r--	2017-04-11 17:51:33	Edit Download recursive recursive
escprober.py	3.86 KB	lrw-r--r--	2017-04-11 17:51:33	Edit Download recursive recursive
escsm.py	10.26 KB	lrw-r--r--	2017-04-11 17:51:33	Edit Download recursive recursive
eucjpprober.py	3.66 KB	lrw-r--r--	2017-04-11 17:51:33	Edit Download recursive recursive
euckrfreq.py	13.23 KB	lrw-r--r--	2017-04-11 17:51:33	Edit Download recursive recursive
euckrprober.py	1.71 KB	lrw-r--r--	2017-04-11 17:51:33	Edit Download recursive recursive
euctwfreq.py	30.88 KB	lrw-r--r--	2017-04-11 20:48:55	Edit Download recursive recursive
euctwprober.py	1.71 KB	lrw-r--r--	2017-04-11 17:51:33	Edit Download recursive recursive
gb2312freq.py	20.23 KB	lrw-r--r--	2017-04-11 17:51:33	Edit Download recursive recursive
gb2312prober.py	1.71 KB	lrw-r--r--	2017-04-11 17:51:33	Edit Download recursive recursive
hebrewprober.py	13.51 KB	lrw-r--r--	2017-06-08 14:21:53	Edit Download recursive recursive
jisfreq.py	25.17 KB	lrw-r--r--	2017-04-11 17:51:33	Edit Download recursive recursive
jpcntx.py	19.18 KB	lrw-r--r--	2017-04-11 17:51:33	Edit Download recursive recursive
langbulgarianmodel.py	12.54 KB	lrw-r--r--	2017-06-08 14:32:38	Edit Download recursive recursive
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langturkishmodel.py	10.84 KB	lrw-r--r--	2017-06-08 14:32:38	Edit Download recursive recursive
latin1prober.py	5.24 KB	lrw-r--r--	2017-06-08 14:21:53	Edit Download recursive recursive
mbcharsetprober.py	3.33 KB	lrw-r--r--	2017-04-11 17:51:33	Edit Download recursive recursive
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mbcssm.py	24.88 KB	lrw-r--r--	2017-04-11 17:51:33	Edit Download recursive recursive
sbcharsetprober.py	5.52 KB	lrw-r--r--	2017-06-08 14:32:38	Edit Download recursive recursive
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sjisprober.py	3.69 KB	lrw-r--r--	2017-04-11 17:51:33	Edit Download recursive recursive
universaldetector.py	12.19 KB	lrw-r--r--	2017-06-08 14:32:38	Edit Download recursive recursive
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