mirror of
https://github.com/moparisthebest/SickRage
synced 2024-11-16 14:25:02 -05:00
92 lines
3.6 KiB
Python
92 lines
3.6 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 #########################
|
|
|
|
import sys
|
|
from .mbcharsetprober import MultiByteCharSetProber
|
|
from .codingstatemachine import CodingStateMachine
|
|
from .chardistribution import SJISDistributionAnalysis
|
|
from .jpcntx import SJISContextAnalysis
|
|
from .mbcssm import SJISSMModel
|
|
from . import constants
|
|
|
|
|
|
class SJISProber(MultiByteCharSetProber):
|
|
def __init__(self):
|
|
MultiByteCharSetProber.__init__(self)
|
|
self._mCodingSM = CodingStateMachine(SJISSMModel)
|
|
self._mDistributionAnalyzer = SJISDistributionAnalysis()
|
|
self._mContextAnalyzer = SJISContextAnalysis()
|
|
self.reset()
|
|
|
|
def reset(self):
|
|
MultiByteCharSetProber.reset(self)
|
|
self._mContextAnalyzer.reset()
|
|
|
|
def get_charset_name(self):
|
|
return "SHIFT_JIS"
|
|
|
|
def feed(self, aBuf):
|
|
aLen = len(aBuf)
|
|
for i in range(0, aLen):
|
|
codingState = self._mCodingSM.next_state(aBuf[i])
|
|
if codingState == constants.eError:
|
|
if constants._debug:
|
|
sys.stderr.write(self.get_charset_name()
|
|
+ ' prober hit error at byte ' + str(i)
|
|
+ '\n')
|
|
self._mState = constants.eNotMe
|
|
break
|
|
elif codingState == constants.eItsMe:
|
|
self._mState = constants.eFoundIt
|
|
break
|
|
elif codingState == constants.eStart:
|
|
charLen = self._mCodingSM.get_current_charlen()
|
|
if i == 0:
|
|
self._mLastChar[1] = aBuf[0]
|
|
self._mContextAnalyzer.feed(self._mLastChar[2 - charLen:],
|
|
charLen)
|
|
self._mDistributionAnalyzer.feed(self._mLastChar, charLen)
|
|
else:
|
|
self._mContextAnalyzer.feed(aBuf[i + 1 - charLen:i + 3
|
|
- charLen], charLen)
|
|
self._mDistributionAnalyzer.feed(aBuf[i - 1:i + 1],
|
|
charLen)
|
|
|
|
self._mLastChar[0] = aBuf[aLen - 1]
|
|
|
|
if self.get_state() == constants.eDetecting:
|
|
if (self._mContextAnalyzer.got_enough_data() and
|
|
(self.get_confidence() > constants.SHORTCUT_THRESHOLD)):
|
|
self._mState = constants.eFoundIt
|
|
|
|
return self.get_state()
|
|
|
|
def get_confidence(self):
|
|
contxtCf = self._mContextAnalyzer.get_confidence()
|
|
distribCf = self._mDistributionAnalyzer.get_confidence()
|
|
return max(contxtCf, distribCf)
|