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//usr/lib/python3/dist-packages/chardet/escprober.py

Text Base64

######################## 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 .codingstatemachine import CodingStateMachine
from .enums import LanguageFilter, ProbingState, MachineState
from .escsm import (HZ_SM_MODEL, ISO2022CN_SM_MODEL, ISO2022JP_SM_MODEL,
                    ISO2022KR_SM_MODEL)

class EscCharSetProber(CharSetProber):
    """
    This CharSetProber uses a "code scheme" approach for detecting encodings,
    whereby easily recognizable escape or shift sequences are relied on to
    identify these encodings.
    """

def __init__(self, lang_filter=None):
        super(EscCharSetProber, self).__init__(lang_filter=lang_filter)
        self.coding_sm = []
        if self.lang_filter & LanguageFilter.CHINESE_SIMPLIFIED:
            self.coding_sm.append(CodingStateMachine(HZ_SM_MODEL))
            self.coding_sm.append(CodingStateMachine(ISO2022CN_SM_MODEL))
        if self.lang_filter & LanguageFilter.JAPANESE:
            self.coding_sm.append(CodingStateMachine(ISO2022JP_SM_MODEL))
        if self.lang_filter & LanguageFilter.KOREAN:
            self.coding_sm.append(CodingStateMachine(ISO2022KR_SM_MODEL))
        self.active_sm_count = None
        self._detected_charset = None
        self._detected_language = None
        self._state = None
        self.reset()

def reset(self):
        super(EscCharSetProber, self).reset()
        for coding_sm in self.coding_sm:
            if not coding_sm:
                continue
            coding_sm.active = True
            coding_sm.reset()
        self.active_sm_count = len(self.coding_sm)
        self._detected_charset = None
        self._detected_language = None

@property
    def charset_name(self):
        return self._detected_charset

@property
    def language(self):
        return self._detected_language

def get_confidence(self):
        if self._detected_charset:
            return 0.99
        else:
            return 0.00

def feed(self, byte_str):
        for c in byte_str:
            for coding_sm in self.coding_sm:
                if not coding_sm or not coding_sm.active:
                    continue
                coding_state = coding_sm.next_state(c)
                if coding_state == MachineState.ERROR:
                    coding_sm.active = False
                    self.active_sm_count -= 1
                    if self.active_sm_count <= 0:
                        self._state = ProbingState.NOT_ME
                        return self.state
                elif coding_state == MachineState.ITS_ME:
                    self._state = ProbingState.FOUND_IT
                    self._detected_charset = coding_sm.get_coding_state_machine()
                    self._detected_language = coding_sm.language
                    return self.state

return self.state

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big5freq.py	30.52 KB	lrw-r--r--	2020-11-17 22:04:05	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--	2020-11-17 22:04:05	Edit Download recursive recursive
charsetgroupprober.py	3.75 KB	lrw-r--r--	2020-12-10 18:52:54	Edit Download recursive recursive
charsetprober.py	4.99 KB	lrw-r--r--	2020-12-08 20:42:21	Edit Download recursive recursive
codingstatemachine.py	3.51 KB	lrw-r--r--	2020-11-17 22:04:05	Edit Download recursive recursive
compat.py	1.17 KB	lrw-r--r--	2020-12-10 18:52:54	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--	2020-11-17 22:04:05	Edit Download recursive recursive
escprober.py	3.86 KB	lrw-r--r--	2020-11-17 22:04:05	Edit Download recursive recursive
escsm.py	10.26 KB	lrw-r--r--	2020-11-17 22:04:05	Edit Download recursive recursive
eucjpprober.py	3.66 KB	lrw-r--r--	2020-11-17 22:04:05	Edit Download recursive recursive
euckrfreq.py	13.23 KB	lrw-r--r--	2020-11-17 22:04:05	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--	2020-11-17 22:04:05	Edit Download recursive recursive
euctwprober.py	1.71 KB	lrw-r--r--	2020-11-17 22:04:05	Edit Download recursive recursive
gb2312freq.py	20.23 KB	lrw-r--r--	2020-11-17 22:04:05	Edit Download recursive recursive
gb2312prober.py	1.71 KB	lrw-r--r--	2020-11-17 22:04:05	Edit Download recursive recursive
hebrewprober.py	13.51 KB	lrw-r--r--	2020-12-08 20:42:21	Edit Download recursive recursive
jisfreq.py	25.17 KB	lrw-r--r--	2020-11-17 22:04:05	Edit Download recursive recursive
jpcntx.py	19.18 KB	lrw-r--r--	2020-11-17 22:04:05	Edit Download recursive recursive
langbulgarianmodel.py	103.21 KB	lrw-r--r--	2020-12-10 18:52:54	Edit Download recursive recursive
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langrussianmodel.py	128.09 KB	lrw-r--r--	2020-12-10 18:52:54	Edit Download recursive recursive
langthaimodel.py	100.88 KB	lrw-r--r--	2020-12-10 18:52:54	Edit Download recursive recursive
langturkishmodel.py	93.69 KB	lrw-r--r--	2020-12-10 18:52:54	Edit Download recursive recursive
latin1prober.py	5.24 KB	lrw-r--r--	2020-12-08 20:42:21	Edit Download recursive recursive
mbcharsetprober.py	3.33 KB	lrw-r--r--	2020-11-17 22:04:05	Edit Download recursive recursive
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