From 68df54d6629ec019142eb149dd037774f2d11e7c Mon Sep 17 00:00:00 2001 From: Shubham Saini Date: Tue, 11 Dec 2018 15:31:23 +0530 Subject: First commit --- .../pip/_vendor/chardet/codingstatemachine.py | 88 ++++++++++++++++++++++ 1 file changed, 88 insertions(+) create mode 100644 venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/chardet/codingstatemachine.py (limited to 'venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/chardet/codingstatemachine.py') diff --git a/venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/chardet/codingstatemachine.py b/venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/chardet/codingstatemachine.py new file mode 100644 index 0000000..c562e1d --- /dev/null +++ b/venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/chardet/codingstatemachine.py @@ -0,0 +1,88 @@ +######################## 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'] -- cgit v1.2.3