ok
Direktori : /proc/thread-self/root/usr/lib/python2.7/site-packages/chardet/ |
Current File : //proc/thread-self/root/usr/lib/python2.7/site-packages/chardet/eucjpprober.py |
######################## 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 . import constants from .mbcharsetprober import MultiByteCharSetProber from .codingstatemachine import CodingStateMachine from .chardistribution import EUCJPDistributionAnalysis from .jpcntx import EUCJPContextAnalysis from .mbcssm import EUCJPSMModel class EUCJPProber(MultiByteCharSetProber): def __init__(self): MultiByteCharSetProber.__init__(self) self._mCodingSM = CodingStateMachine(EUCJPSMModel) self._mDistributionAnalyzer = EUCJPDistributionAnalysis() self._mContextAnalyzer = EUCJPContextAnalysis() self.reset() def reset(self): MultiByteCharSetProber.reset(self) self._mContextAnalyzer.reset() def get_charset_name(self): return "EUC-JP" def feed(self, aBuf): aLen = len(aBuf) for i in range(0, aLen): # PY3K: aBuf is a byte array, so aBuf[i] is an int, not a byte 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, charLen) self._mDistributionAnalyzer.feed(self._mLastChar, charLen) else: self._mContextAnalyzer.feed(aBuf[i - 1:i + 1], 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)