Mercurial > repos > bcclaywell > argo_navis

comparison venv/lib/python2.7/site-packages/requests/packages/chardet/utf8prober.py @ 0:d67268158946 draft

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planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
author bcclaywell
date Mon, 12 Oct 2015 17:43:33 -0400
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-1:000000000000 0:d67268158946
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 from . import constants
29 from .charsetprober import CharSetProber
30 from .codingstatemachine import CodingStateMachine
31 from .mbcssm import UTF8SMModel
32
33 ONE_CHAR_PROB = 0.5
34
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 == constants.eError:
54 self._mState = constants.eNotMe
55 break
56 elif codingState == constants.eItsMe:
57 self._mState = constants.eFoundIt
58 break
59 elif codingState == constants.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