Mercurial Repositories > eric / file comparison
comparison: ThirdParty/CharDet/chardet/utf8prober.py
ThirdParty/CharDet/chardet/utf8prober.py
- changeset 0
- de9c2efb9d02
- child 12
- 1d8dd9706f46
equal
deleted
inserted
replaced
| -1:000000000000 | 0:de9c2efb9d02 |
|---|---|
| 1 ######################## BEGIN LICENSE BLOCK ######################## | |
| 2 # The Original Code is mozilla.org code. | |
| 3 # | |
| 4 # The Initial Developer of the Original Code is | |
| 5 # Netscape Communications Corporation. | |
| 6 # Portions created by the Initial Developer are Copyright (C) 1998 | |
| 7 # the Initial Developer. All Rights Reserved. | |
| 8 # | |
| 9 # Contributor(s): | |
| 10 # Mark Pilgrim - port to Python | |
| 11 # | |
| 12 # This library is free software; you can redistribute it and/or | |
| 13 # modify it under the terms of the GNU Lesser General Public | |
| 14 # License as published by the Free Software Foundation; either | |
| 15 # version 2.1 of the License, or (at your option) any later version. | |
| 16 # | |
| 17 # This library is distributed in the hope that it will be useful, | |
| 18 # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 19 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 20 # Lesser General Public License for more details. | |
| 21 # | |
| 22 # You should have received a copy of the GNU Lesser General Public | |
| 23 # License along with this library; if not, write to the Free Software | |
| 24 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
| 25 # 02110-1301 USA | |
| 26 ######################### END LICENSE BLOCK ######################### | |
| 27 | |
| 28 import constants, sys | |
| 29 from constants import eStart, eError, eItsMe | |
| 30 from charsetprober import CharSetProber | |
| 31 from codingstatemachine import CodingStateMachine | |
| 32 from mbcssm import UTF8SMModel | |
| 33 | |
| 34 ONE_CHAR_PROB = 0.5 | |
| 35 | |
| 36 class UTF8Prober(CharSetProber): | |
| 37 def __init__(self): | |
| 38 CharSetProber.__init__(self) | |
| 39 self._mCodingSM = CodingStateMachine(UTF8SMModel) | |
| 40 self.reset() | |
| 41 | |
| 42 def reset(self): | |
| 43 CharSetProber.reset(self) | |
| 44 self._mCodingSM.reset() | |
| 45 self._mNumOfMBChar = 0 | |
| 46 | |
| 47 def get_charset_name(self): | |
| 48 return "utf-8" | |
| 49 | |
| 50 def feed(self, aBuf): | |
| 51 for c in aBuf: | |
| 52 codingState = self._mCodingSM.next_state(c) | |
| 53 if codingState == eError: | |
| 54 self._mState = constants.eNotMe | |
| 55 break | |
| 56 elif codingState == eItsMe: | |
| 57 self._mState = constants.eFoundIt | |
| 58 break | |
| 59 elif codingState == eStart: | |
| 60 if self._mCodingSM.get_current_charlen() >= 2: | |
| 61 self._mNumOfMBChar += 1 | |
| 62 | |
| 63 if self.get_state() == constants.eDetecting: | |
| 64 if self.get_confidence() > constants.SHORTCUT_THRESHOLD: | |
| 65 self._mState = constants.eFoundIt | |
| 66 | |
| 67 return self.get_state() | |
| 68 | |
| 69 def get_confidence(self): | |
| 70 unlike = 0.99 | |
| 71 if self._mNumOfMBChar < 6: | |
| 72 for i in range(0, self._mNumOfMBChar): | |
| 73 unlike = unlike * ONE_CHAR_PROB | |
| 74 return 1.0 - unlike | |
| 75 else: | |
| 76 return unlike |
