BLUE

Navigation

Breadcrumbs

/ / usr / lib / python3 / dist-packages / chardet

Create

Upload

Tip: You can also drag & drop files anywhere on this page to upload.

Edit File Size: 3.51 KB

//usr/lib/python3/dist-packages/chardet/codingstatemachine.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 #########################

import logging

from .enums import MachineState

class CodingStateMachine(object):
    """
    A state machine to verify a byte sequence for a particular encoding. For
    each byte the detector receives, it will feed that byte to every active
    state machine available, one byte at a time. The state machine changes its
    state based on its previous state and the byte it receives. There are 3
    states in a state machine that are of interest to an auto-detector:

START state: This is the state to start with, or a legal byte sequence
                 (i.e. a valid code point) for character has been identified.

ME state:  This indicates that the state machine identified a byte sequence
               that is specific to the charset it is designed for and that
               there is no other possible encoding which can contain this byte
               sequence. This will to lead to an immediate positive answer for
               the detector.

ERROR state: This indicates the state machine identified an illegal byte
                 sequence for that encoding. This will lead to an immediate
                 negative answer for this encoding. Detector will exclude this
                 encoding from consideration from here on.
    """
    def __init__(self, sm):
        self._model = sm
        self._curr_byte_pos = 0
        self._curr_char_len = 0
        self._curr_state = None
        self.logger = logging.getLogger(__name__)
        self.reset()

def reset(self):
        self._curr_state = MachineState.START

def next_state(self, c):
        # for each byte we get its class
        # if it is first byte, we also get byte length
        byte_class = self._model['class_table'][c]
        if self._curr_state == MachineState.START:
            self._curr_byte_pos = 0
            self._curr_char_len = self._model['char_len_table'][byte_class]
        # from byte's class and state_table, we get its next state
        curr_state = (self._curr_state * self._model['class_factor']
                      + byte_class)
        self._curr_state = self._model['state_table'][curr_state]
        self._curr_byte_pos += 1
        return self._curr_state

def get_current_charlen(self):
        return self._curr_char_len

def get_coding_state_machine(self):
        return self._model['name']

@property
    def language(self):
        return self._model['language']

Exit & Reset Text mode: syntax highlighting auto-detects file type.

Directory Contents

Dirs: 3 × Files: 39

Sort:

Enable drag-to-move

Name	Size	Perms	Modified	Actions
cli DIR	-	drwxr-xr-x	2022-08-09 11:58:56	Edit Download recursive recursive
metadata DIR	-	drwxr-xr-x	2022-08-09 11:58:56	Edit Download recursive recursive
__pycache__ DIR	-	drwxr-xr-x	2022-08-09 11:57:43	Edit Download recursive recursive
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
langgreekmodel.py	97.23 KB	lrw-r--r--	2020-12-10 18:52:54	Edit Download recursive recursive
langhebrewmodel.py	96.45 KB	lrw-r--r--	2020-12-10 18:52:54	Edit Download recursive recursive
langhungarianmodel.py	100.08 KB	lrw-r--r--	2020-12-10 18:52:54	Edit Download recursive recursive
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
mbcsgroupprober.py	1.96 KB	lrw-r--r--	2020-11-17 22:04:05	Edit Download recursive recursive
mbcssm.py	24.88 KB	lrw-r--r--	2020-11-17 22:04:05	Edit Download recursive recursive
sbcharsetprober.py	5.99 KB	lrw-r--r--	2020-12-10 18:52:54	Edit Download recursive recursive
sbcsgroupprober.py	4.21 KB	lrw-r--r--	2020-12-10 18:52:54	Edit Download recursive recursive
sjisprober.py	3.69 KB	lrw-r--r--	2020-11-17 22:04:05	Edit Download recursive recursive
universaldetector.py	12.21 KB	lrw-r--r--	2020-12-10 18:52:54	Edit Download recursive recursive
utf8prober.py	2.70 KB	lrw-r--r--	2020-11-17 22:04:05	Edit Download recursive recursive
version.py	242 B	lrw-r--r--	2020-12-10 18:52:54	Edit Download recursive recursive
__init__.py	3.19 KB	lrw-r--r--	2020-12-10 18:52:54	Edit Download recursive recursive