Coverage for chardet/utf8prober.py: 29%

# Coverage for chardet/utf8prober.py : 29%

## 41 statements 12 run 29 missing 0 excluded

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 | ######################## 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 .charsetprober import CharSetProber from .enums import ProbingState, MachineState from .codingstatemachine import CodingStateMachine from .mbcssm import UTF8_SM_MODEL class UTF8Prober(CharSetProber): ONE_CHAR_PROB = 0.5 def __init__(self): super(UTF8Prober, self).__init__() self.coding_sm = CodingStateMachine(UTF8_SM_MODEL) self._num_mb_chars = None self.reset() def reset(self): super(UTF8Prober, self).reset() self.coding_sm.reset() self._num_mb_chars = 0 @property def charset_name(self): return "utf-8" @property def language(self): return "" def feed(self, byte_str): for c in byte_str: coding_state = self.coding_sm.next_state(c) if coding_state == MachineState.ERROR: self._state = ProbingState.NOT_ME break elif coding_state == MachineState.ITS_ME: self._state = ProbingState.FOUND_IT break elif coding_state == MachineState.START: if self.coding_sm.get_current_charlen() >= 2: self._num_mb_chars += 1 if self.state == ProbingState.DETECTING: if self.get_confidence() > self.SHORTCUT_THRESHOLD: self._state = ProbingState.FOUND_IT return self.state def get_confidence(self): unlike = 0.99 if self._num_mb_chars < 6: unlike *= self.ONE_CHAR_PROB ** self._num_mb_chars return 1.0 - unlike else: return unlike