FM / chardet

/snap/core20/2769/usr/lib/python3/dist-packages/chardet/

/snap/core20/2769/usr/lib/python3/dist-packages/chardet

Name	Size	Mode	Actions
cli/	-	0755	rm
__pycache__/	-	0755	rm
big5freq.py	31254	0644	edit dl rm
big5prober.py	1757	0644	edit dl rm
chardistribution.py	9411	0644	edit dl rm
charsetgroupprober.py	3787	0644	edit dl rm
charsetprober.py	5110	0644	edit dl rm
codingstatemachine.py	3590	0644	edit dl rm
compat.py	1134	0644	edit dl rm
cp949prober.py	1855	0644	edit dl rm
enums.py	1661	0644	edit dl rm
escprober.py	3950	0644	edit dl rm
escsm.py	10510	0644	edit dl rm
eucjpprober.py	3749	0644	edit dl rm
euckrfreq.py	13546	0644	edit dl rm
euckrprober.py	1748	0644	edit dl rm
euctwfreq.py	31621	0644	edit dl rm
euctwprober.py	1747	0644	edit dl rm
gb2312freq.py	20715	0644	edit dl rm
gb2312prober.py	1754	0644	edit dl rm
hebrewprober.py	13838	0644	edit dl rm
jisfreq.py	25777	0644	edit dl rm
jpcntx.py	19643	0644	edit dl rm
langbulgarianmodel.py	12839	0644	edit dl rm
langcyrillicmodel.py	17948	0644	edit dl rm
langgreekmodel.py	12688	0644	edit dl rm
langhebrewmodel.py	11345	0644	edit dl rm
langhungarianmodel.py	12592	0644	edit dl rm
langthaimodel.py	11290	0644	edit dl rm
langturkishmodel.py	11102	0644	edit dl rm
latin1prober.py	5370	0644	edit dl rm
mbcharsetprober.py	3413	0644	edit dl rm
mbcsgroupprober.py	2012	0644	edit dl rm
mbcssm.py	25481	0644	edit dl rm
sbcharsetprober.py	5657	0644	edit dl rm
sbcsgroupprober.py	3546	0644	edit dl rm
sjisprober.py	3774	0644	edit dl rm
universaldetector.py	12485	0644	edit dl rm
utf8prober.py	2766	0644	edit dl rm
version.py	242	0644	edit dl rm
__init__.py	1559	0644	edit dl rm

Edit: /snap/core20/2769/usr/lib/python3/dist-packages/chardet/chardistribution.py (9411B)

######################## BEGIN LICENSE BLOCK ########################
# The Original Code is Mozilla Communicator client 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 .euctwfreq import (EUCTW_CHAR_TO_FREQ_ORDER, EUCTW_TABLE_SIZE,
                        EUCTW_TYPICAL_DISTRIBUTION_RATIO)
from .euckrfreq import (EUCKR_CHAR_TO_FREQ_ORDER, EUCKR_TABLE_SIZE,
                        EUCKR_TYPICAL_DISTRIBUTION_RATIO)
from .gb2312freq import (GB2312_CHAR_TO_FREQ_ORDER, GB2312_TABLE_SIZE,
                         GB2312_TYPICAL_DISTRIBUTION_RATIO)
from .big5freq import (BIG5_CHAR_TO_FREQ_ORDER, BIG5_TABLE_SIZE,
                       BIG5_TYPICAL_DISTRIBUTION_RATIO)
from .jisfreq import (JIS_CHAR_TO_FREQ_ORDER, JIS_TABLE_SIZE,
                      JIS_TYPICAL_DISTRIBUTION_RATIO)

class CharDistributionAnalysis(object):
    ENOUGH_DATA_THRESHOLD = 1024
    SURE_YES = 0.99
    SURE_NO = 0.01
    MINIMUM_DATA_THRESHOLD = 3

def __init__(self):
        # Mapping table to get frequency order from char order (get from
        # GetOrder())
        self._char_to_freq_order = None
        self._table_size = None  # Size of above table
        # This is a constant value which varies from language to language,
        # used in calculating confidence.  See
        # http://www.mozilla.org/projects/intl/UniversalCharsetDetection.html
        # for further detail.
        self.typical_distribution_ratio = None
        self._done = None
        self._total_chars = None
        self._freq_chars = None
        self.reset()

def reset(self):
        """reset analyser, clear any state"""
        # If this flag is set to True, detection is done and conclusion has
        # been made
        self._done = False
        self._total_chars = 0  # Total characters encountered
        # The number of characters whose frequency order is less than 512
        self._freq_chars = 0

def feed(self, char, char_len):
        """feed a character with known length"""
        if char_len == 2:
            # we only care about 2-bytes character in our distribution analysis
            order = self.get_order(char)
        else:
            order = -1
        if order >= 0:
            self._total_chars += 1
            # order is valid
            if order < self._table_size:
                if 512 > self._char_to_freq_order[order]:
                    self._freq_chars += 1

def get_confidence(self):
        """return confidence based on existing data"""
        # if we didn't receive any character in our consideration range,
        # return negative answer
        if self._total_chars <= 0 or self._freq_chars <= self.MINIMUM_DATA_THRESHOLD:
            return self.SURE_NO

if self._total_chars != self._freq_chars:
            r = (self._freq_chars / ((self._total_chars - self._freq_chars)
                 * self.typical_distribution_ratio))
            if r < self.SURE_YES:
                return r

# normalize confidence (we don't want to be 100% sure)
        return self.SURE_YES

def got_enough_data(self):
        # It is not necessary to receive all data to draw conclusion.
        # For charset detection, certain amount of data is enough
        return self._total_chars > self.ENOUGH_DATA_THRESHOLD

def get_order(self, byte_str):
        # We do not handle characters based on the original encoding string,
        # but convert this encoding string to a number, here called order.
        # This allows multiple encodings of a language to share one frequency
        # table.
        return -1

class EUCTWDistributionAnalysis(CharDistributionAnalysis):
    def __init__(self):
        super(EUCTWDistributionAnalysis, self).__init__()
        self._char_to_freq_order = EUCTW_CHAR_TO_FREQ_ORDER
        self._table_size = EUCTW_TABLE_SIZE
        self.typical_distribution_ratio = EUCTW_TYPICAL_DISTRIBUTION_RATIO

def get_order(self, byte_str):
        # for euc-TW encoding, we are interested
        #   first  byte range: 0xc4 -- 0xfe
        #   second byte range: 0xa1 -- 0xfe
        # no validation needed here. State machine has done that
        first_char = byte_str[0]
        if first_char >= 0xC4:
            return 94 * (first_char - 0xC4) + byte_str[1] - 0xA1
        else:
            return -1

class EUCKRDistributionAnalysis(CharDistributionAnalysis):
    def __init__(self):
        super(EUCKRDistributionAnalysis, self).__init__()
        self._char_to_freq_order = EUCKR_CHAR_TO_FREQ_ORDER
        self._table_size = EUCKR_TABLE_SIZE
        self.typical_distribution_ratio = EUCKR_TYPICAL_DISTRIBUTION_RATIO

def get_order(self, byte_str):
        # for euc-KR encoding, we are interested
        #   first  byte range: 0xb0 -- 0xfe
        #   second byte range: 0xa1 -- 0xfe
        # no validation needed here. State machine has done that
        first_char = byte_str[0]
        if first_char >= 0xB0:
            return 94 * (first_char - 0xB0) + byte_str[1] - 0xA1
        else:
            return -1

class GB2312DistributionAnalysis(CharDistributionAnalysis):
    def __init__(self):
        super(GB2312DistributionAnalysis, self).__init__()
        self._char_to_freq_order = GB2312_CHAR_TO_FREQ_ORDER
        self._table_size = GB2312_TABLE_SIZE
        self.typical_distribution_ratio = GB2312_TYPICAL_DISTRIBUTION_RATIO

def get_order(self, byte_str):
        # for GB2312 encoding, we are interested
        #  first  byte range: 0xb0 -- 0xfe
        #  second byte range: 0xa1 -- 0xfe
        # no validation needed here. State machine has done that
        first_char, second_char = byte_str[0], byte_str[1]
        if (first_char >= 0xB0) and (second_char >= 0xA1):
            return 94 * (first_char - 0xB0) + second_char - 0xA1
        else:
            return -1

class Big5DistributionAnalysis(CharDistributionAnalysis):
    def __init__(self):
        super(Big5DistributionAnalysis, self).__init__()
        self._char_to_freq_order = BIG5_CHAR_TO_FREQ_ORDER
        self._table_size = BIG5_TABLE_SIZE
        self.typical_distribution_ratio = BIG5_TYPICAL_DISTRIBUTION_RATIO

def get_order(self, byte_str):
        # for big5 encoding, we are interested
        #   first  byte range: 0xa4 -- 0xfe
        #   second byte range: 0x40 -- 0x7e , 0xa1 -- 0xfe
        # no validation needed here. State machine has done that
        first_char, second_char = byte_str[0], byte_str[1]
        if first_char >= 0xA4:
            if second_char >= 0xA1:
                return 157 * (first_char - 0xA4) + second_char - 0xA1 + 63
            else:
                return 157 * (first_char - 0xA4) + second_char - 0x40
        else:
            return -1

class SJISDistributionAnalysis(CharDistributionAnalysis):
    def __init__(self):
        super(SJISDistributionAnalysis, self).__init__()
        self._char_to_freq_order = JIS_CHAR_TO_FREQ_ORDER
        self._table_size = JIS_TABLE_SIZE
        self.typical_distribution_ratio = JIS_TYPICAL_DISTRIBUTION_RATIO

def get_order(self, byte_str):
        # for sjis encoding, we are interested
        #   first  byte range: 0x81 -- 0x9f , 0xe0 -- 0xfe
        #   second byte range: 0x40 -- 0x7e,  0x81 -- oxfe
        # no validation needed here. State machine has done that
        first_char, second_char = byte_str[0], byte_str[1]
        if (first_char >= 0x81) and (first_char <= 0x9F):
            order = 188 * (first_char - 0x81)
        elif (first_char >= 0xE0) and (first_char <= 0xEF):
            order = 188 * (first_char - 0xE0 + 31)
        else:
            return -1
        order = order + second_char - 0x40
        if second_char > 0x7F:
            order = -1
        return order

class EUCJPDistributionAnalysis(CharDistributionAnalysis):
    def __init__(self):
        super(EUCJPDistributionAnalysis, self).__init__()
        self._char_to_freq_order = JIS_CHAR_TO_FREQ_ORDER
        self._table_size = JIS_TABLE_SIZE
        self.typical_distribution_ratio = JIS_TYPICAL_DISTRIBUTION_RATIO

def get_order(self, byte_str):
        # for euc-JP encoding, we are interested
        #   first  byte range: 0xa0 -- 0xfe
        #   second byte range: 0xa1 -- 0xfe
        # no validation needed here. State machine has done that
        char = byte_str[0]
        if char >= 0xA0:
            return 94 * (char - 0xA1) + byte_str[1] - 0xa1
        else:
            return -1

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