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📄 __init__.py(1.26 KB)
📄 __init__.pyc(797 B)
📄 __init__.pyo(797 B)
📄 big5freq.py(80.66 KB)
📄 big5freq.pyc(111.11 KB)
📄 big5freq.pyo(111.11 KB)
📄 big5prober.py(1.64 KB)
📄 big5prober.pyc(1.07 KB)
📄 big5prober.pyo(1.07 KB)
📄 chardetect.py(1.09 KB)
📄 chardetect.pyc(1.46 KB)
📄 chardetect.pyo(1.46 KB)
📄 chardistribution.py(9.01 KB)
📄 chardistribution.pyc(7.35 KB)
📄 chardistribution.pyo(7.35 KB)
📄 charsetgroupprober.py(3.7 KB)
📄 charsetgroupprober.pyc(2.48 KB)
📄 charsetgroupprober.pyo(2.48 KB)
📄 charsetprober.py(1.86 KB)
📄 charsetprober.pyc(2.08 KB)
📄 charsetprober.pyo(2.08 KB)
📄 codingstatemachine.py(2.26 KB)
📄 codingstatemachine.pyc(1.74 KB)
📄 codingstatemachine.pyo(1.74 KB)
📄 compat.py(1.13 KB)
📄 compat.pyc(559 B)
📄 compat.pyo(559 B)
📄 constants.py(1.3 KB)
📄 constants.pyc(332 B)
📄 constants.pyo(332 B)
📄 cp949prober.py(1.74 KB)
📄 cp949prober.pyc(1.07 KB)
📄 cp949prober.pyo(1.07 KB)
📄 escprober.py(3.11 KB)
📄 escprober.pyc(2.31 KB)
📄 escprober.pyo(2.31 KB)
📄 escsm.py(7.66 KB)
📄 escsm.pyc(7.13 KB)
📄 escsm.pyo(7.13 KB)
📄 eucjpprober.py(3.59 KB)
📄 eucjpprober.pyc(2.71 KB)
📄 eucjpprober.pyo(2.71 KB)
📄 euckrfreq.py(44.9 KB)
📄 euckrfreq.pyc(86.69 KB)
📄 euckrfreq.pyo(86.69 KB)
📄 euckrprober.py(1.64 KB)
📄 euckrprober.pyc(1.08 KB)
📄 euckrprober.pyo(1.08 KB)
📄 euctwfreq.py(34.05 KB)
📄 euctwfreq.pyc(59.74 KB)
📄 euctwfreq.pyo(59.74 KB)
📄 euctwprober.py(1.64 KB)
📄 euctwprober.pyc(1.08 KB)
📄 euctwprober.pyo(1.08 KB)
📄 gb2312freq.py(35.17 KB)
📄 gb2312freq.pyc(67.17 KB)
📄 gb2312freq.pyo(67.17 KB)
📄 gb2312prober.py(1.64 KB)
📄 gb2312prober.pyc(1.08 KB)
📄 gb2312prober.pyo(1.08 KB)
📄 hebrewprober.py(13.05 KB)
📄 hebrewprober.pyc(3.32 KB)
📄 hebrewprober.pyo(3.32 KB)
📄 jisfreq.py(46.21 KB)
📄 jisfreq.pyc(82.03 KB)
📄 jisfreq.pyo(82.03 KB)
📄 jpcntx.py(18.66 KB)
📄 jpcntx.pyc(24.04 KB)
📄 jpcntx.pyo(24.04 KB)
📄 langbulgarianmodel.py(12.48 KB)
📄 langbulgarianmodel.pyc(24.3 KB)
📄 langbulgarianmodel.pyo(24.3 KB)
📄 langcyrillicmodel.py(17.31 KB)
📄 langcyrillicmodel.pyc(29.85 KB)
📄 langcyrillicmodel.pyo(29.85 KB)
📄 langgreekmodel.py(12.33 KB)
📄 langgreekmodel.pyc(24 KB)
📄 langgreekmodel.pyo(24 KB)
📄 langhebrewmodel.py(11.05 KB)
📄 langhebrewmodel.pyc(22.84 KB)
📄 langhebrewmodel.pyo(22.84 KB)
📄 langhungarianmodel.py(12.24 KB)
📄 langhungarianmodel.pyc(24.29 KB)
📄 langhungarianmodel.pyo(24.29 KB)
📄 langthaimodel.py(11.01 KB)
📄 langthaimodel.pyc(22.83 KB)
📄 langthaimodel.pyo(22.83 KB)
📄 latin1prober.py(5.12 KB)
📄 latin1prober.pyc(3.37 KB)
📄 latin1prober.pyo(3.37 KB)
📄 mbcharsetprober.py(3.19 KB)
📄 mbcharsetprober.pyc(2.36 KB)
📄 mbcharsetprober.pyo(2.36 KB)
📄 mbcsgroupprober.py(1.92 KB)
📄 mbcsgroupprober.pyc(1.22 KB)
📄 mbcsgroupprober.pyo(1.22 KB)
📄 mbcssm.py(19.15 KB)
📄 mbcssm.pyc(17.25 KB)
📄 mbcssm.pyo(17.25 KB)
📄 sbcharsetprober.py(4.68 KB)
📄 sbcharsetprober.pyc(3.22 KB)
📄 sbcharsetprober.pyo(3.22 KB)
📄 sbcsgroupprober.py(3.21 KB)
📄 sbcsgroupprober.pyc(1.89 KB)
📄 sbcsgroupprober.pyo(1.89 KB)
📄 sjisprober.py(3.65 KB)
📄 sjisprober.pyc(2.73 KB)
📄 sjisprober.pyo(2.73 KB)
📄 universaldetector.py(6.67 KB)
📄 universaldetector.pyc(4.02 KB)
📄 universaldetector.pyo(4.02 KB)
📄 utf8prober.py(2.59 KB)
📄 utf8prober.pyc(2.14 KB)
📄 utf8prober.pyo(2.14 KB)

Editing: chardistribution.py

######################## 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 (EUCTWCharToFreqOrder, EUCTW_TABLE_SIZE,
                        EUCTW_TYPICAL_DISTRIBUTION_RATIO)
from .euckrfreq import (EUCKRCharToFreqOrder, EUCKR_TABLE_SIZE,
                        EUCKR_TYPICAL_DISTRIBUTION_RATIO)
from .gb2312freq import (GB2312CharToFreqOrder, GB2312_TABLE_SIZE,
                         GB2312_TYPICAL_DISTRIBUTION_RATIO)
from .big5freq import (Big5CharToFreqOrder, BIG5_TABLE_SIZE,
                       BIG5_TYPICAL_DISTRIBUTION_RATIO)
from .jisfreq import (JISCharToFreqOrder, JIS_TABLE_SIZE,
                      JIS_TYPICAL_DISTRIBUTION_RATIO)
from .compat import wrap_ord

ENOUGH_DATA_THRESHOLD = 1024
SURE_YES = 0.99
SURE_NO = 0.01
MINIMUM_DATA_THRESHOLD = 3

class CharDistributionAnalysis:
    def __init__(self):
        # Mapping table to get frequency order from char order (get from
        # GetOrder())
        self._mCharToFreqOrder = None
        self._mTableSize = 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._mTypicalDistributionRatio = 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._mDone = False
        self._mTotalChars = 0  # Total characters encountered
        # The number of characters whose frequency order is less than 512
        self._mFreqChars = 0

def feed(self, aBuf, aCharLen):
        """feed a character with known length"""
        if aCharLen == 2:
            # we only care about 2-bytes character in our distribution analysis
            order = self.get_order(aBuf)
        else:
            order = -1
        if order >= 0:
            self._mTotalChars += 1
            # order is valid
            if order < self._mTableSize:
                if 512 > self._mCharToFreqOrder[order]:
                    self._mFreqChars += 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._mTotalChars <= 0 or self._mFreqChars <= MINIMUM_DATA_THRESHOLD:
            return SURE_NO

if self._mTotalChars != self._mFreqChars:
            r = (self._mFreqChars / ((self._mTotalChars - self._mFreqChars)
                 * self._mTypicalDistributionRatio))
            if r < SURE_YES:
                return r

# normalize confidence (we don't want to be 100% sure)
        return 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._mTotalChars > ENOUGH_DATA_THRESHOLD

def get_order(self, aBuf):
        # 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):
        CharDistributionAnalysis.__init__(self)
        self._mCharToFreqOrder = EUCTWCharToFreqOrder
        self._mTableSize = EUCTW_TABLE_SIZE
        self._mTypicalDistributionRatio = EUCTW_TYPICAL_DISTRIBUTION_RATIO

def get_order(self, aBuf):
        # 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 = wrap_ord(aBuf[0])
        if first_char >= 0xC4:
            return 94 * (first_char - 0xC4) + wrap_ord(aBuf[1]) - 0xA1
        else:
            return -1

class EUCKRDistributionAnalysis(CharDistributionAnalysis):
    def __init__(self):
        CharDistributionAnalysis.__init__(self)
        self._mCharToFreqOrder = EUCKRCharToFreqOrder
        self._mTableSize = EUCKR_TABLE_SIZE
        self._mTypicalDistributionRatio = EUCKR_TYPICAL_DISTRIBUTION_RATIO

def get_order(self, aBuf):
        # 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 = wrap_ord(aBuf[0])
        if first_char >= 0xB0:
            return 94 * (first_char - 0xB0) + wrap_ord(aBuf[1]) - 0xA1
        else:
            return -1

class GB2312DistributionAnalysis(CharDistributionAnalysis):
    def __init__(self):
        CharDistributionAnalysis.__init__(self)
        self._mCharToFreqOrder = GB2312CharToFreqOrder
        self._mTableSize = GB2312_TABLE_SIZE
        self._mTypicalDistributionRatio = GB2312_TYPICAL_DISTRIBUTION_RATIO

def get_order(self, aBuf):
        # 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 = wrap_ord(aBuf[0]), wrap_ord(aBuf[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):
        CharDistributionAnalysis.__init__(self)
        self._mCharToFreqOrder = Big5CharToFreqOrder
        self._mTableSize = BIG5_TABLE_SIZE
        self._mTypicalDistributionRatio = BIG5_TYPICAL_DISTRIBUTION_RATIO

def get_order(self, aBuf):
        # 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 = wrap_ord(aBuf[0]), wrap_ord(aBuf[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):
        CharDistributionAnalysis.__init__(self)
        self._mCharToFreqOrder = JISCharToFreqOrder
        self._mTableSize = JIS_TABLE_SIZE
        self._mTypicalDistributionRatio = JIS_TYPICAL_DISTRIBUTION_RATIO

def get_order(self, aBuf):
        # 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 = wrap_ord(aBuf[0]), wrap_ord(aBuf[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):
        CharDistributionAnalysis.__init__(self)
        self._mCharToFreqOrder = JISCharToFreqOrder
        self._mTableSize = JIS_TABLE_SIZE
        self._mTypicalDistributionRatio = JIS_TYPICAL_DISTRIBUTION_RATIO

def get_order(self, aBuf):
        # 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 = wrap_ord(aBuf[0])
        if char >= 0xA0:
            return 94 * (char - 0xA1) + wrap_ord(aBuf[1]) - 0xa1
        else:
            return -1

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