mirror of
https://github.com/moparisthebest/SickRage
synced 2024-10-31 23:45:02 -04:00
62 lines
2.3 KiB
Python
62 lines
2.3 KiB
Python
######################## 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 .constants import eStart
|
|
from .compat import wrap_ord
|
|
|
|
|
|
class CodingStateMachine:
|
|
def __init__(self, sm):
|
|
self._mModel = sm
|
|
self._mCurrentBytePos = 0
|
|
self._mCurrentCharLen = 0
|
|
self.reset()
|
|
|
|
def reset(self):
|
|
self._mCurrentState = eStart
|
|
|
|
def next_state(self, c):
|
|
# for each byte we get its class
|
|
# if it is first byte, we also get byte length
|
|
# PY3K: aBuf is a byte stream, so c is an int, not a byte
|
|
byteCls = self._mModel['classTable'][wrap_ord(c)]
|
|
if self._mCurrentState == eStart:
|
|
self._mCurrentBytePos = 0
|
|
self._mCurrentCharLen = self._mModel['charLenTable'][byteCls]
|
|
# from byte's class and stateTable, we get its next state
|
|
curr_state = (self._mCurrentState * self._mModel['classFactor']
|
|
+ byteCls)
|
|
self._mCurrentState = self._mModel['stateTable'][curr_state]
|
|
self._mCurrentBytePos += 1
|
|
return self._mCurrentState
|
|
|
|
def get_current_charlen(self):
|
|
return self._mCurrentCharLen
|
|
|
|
def get_coding_state_machine(self):
|
|
return self._mModel['name']
|