| Index: swarm_client/third_party/requests/packages/charade/sbcharsetprober.py
|
| ===================================================================
|
| --- swarm_client/third_party/requests/packages/charade/sbcharsetprober.py (revision 235167)
|
| +++ swarm_client/third_party/requests/packages/charade/sbcharsetprober.py (working copy)
|
| @@ -1,120 +0,0 @@
|
| -######################## BEGIN LICENSE BLOCK ########################
|
| -# The Original Code is Mozilla Universal charset detector code.
|
| -#
|
| -# The Initial Developer of the Original Code is
|
| -# Netscape Communications Corporation.
|
| -# Portions created by the Initial Developer are Copyright (C) 2001
|
| -# the Initial Developer. All Rights Reserved.
|
| -#
|
| -# Contributor(s):
|
| -# Mark Pilgrim - port to Python
|
| -# Shy Shalom - original C code
|
| -#
|
| -# 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 .charsetprober import CharSetProber
|
| -from .compat import wrap_ord
|
| -
|
| -SAMPLE_SIZE = 64
|
| -SB_ENOUGH_REL_THRESHOLD = 1024
|
| -POSITIVE_SHORTCUT_THRESHOLD = 0.95
|
| -NEGATIVE_SHORTCUT_THRESHOLD = 0.05
|
| -SYMBOL_CAT_ORDER = 250
|
| -NUMBER_OF_SEQ_CAT = 4
|
| -POSITIVE_CAT = NUMBER_OF_SEQ_CAT - 1
|
| -#NEGATIVE_CAT = 0
|
| -
|
| -
|
| -class SingleByteCharSetProber(CharSetProber):
|
| - def __init__(self, model, reversed=False, nameProber=None):
|
| - CharSetProber.__init__(self)
|
| - self._mModel = model
|
| - # TRUE if we need to reverse every pair in the model lookup
|
| - self._mReversed = reversed
|
| - # Optional auxiliary prober for name decision
|
| - self._mNameProber = nameProber
|
| - self.reset()
|
| -
|
| - def reset(self):
|
| - CharSetProber.reset(self)
|
| - # char order of last character
|
| - self._mLastOrder = 255
|
| - self._mSeqCounters = [0] * NUMBER_OF_SEQ_CAT
|
| - self._mTotalSeqs = 0
|
| - self._mTotalChar = 0
|
| - # characters that fall in our sampling range
|
| - self._mFreqChar = 0
|
| -
|
| - def get_charset_name(self):
|
| - if self._mNameProber:
|
| - return self._mNameProber.get_charset_name()
|
| - else:
|
| - return self._mModel['charsetName']
|
| -
|
| - def feed(self, aBuf):
|
| - if not self._mModel['keepEnglishLetter']:
|
| - aBuf = self.filter_without_english_letters(aBuf)
|
| - aLen = len(aBuf)
|
| - if not aLen:
|
| - return self.get_state()
|
| - for c in aBuf:
|
| - order = self._mModel['charToOrderMap'][wrap_ord(c)]
|
| - if order < SYMBOL_CAT_ORDER:
|
| - self._mTotalChar += 1
|
| - if order < SAMPLE_SIZE:
|
| - self._mFreqChar += 1
|
| - if self._mLastOrder < SAMPLE_SIZE:
|
| - self._mTotalSeqs += 1
|
| - if not self._mReversed:
|
| - i = (self._mLastOrder * SAMPLE_SIZE) + order
|
| - model = self._mModel['precedenceMatrix'][i]
|
| - else: # reverse the order of the letters in the lookup
|
| - i = (order * SAMPLE_SIZE) + self._mLastOrder
|
| - model = self._mModel['precedenceMatrix'][i]
|
| - self._mSeqCounters[model] += 1
|
| - self._mLastOrder = order
|
| -
|
| - if self.get_state() == constants.eDetecting:
|
| - if self._mTotalSeqs > SB_ENOUGH_REL_THRESHOLD:
|
| - cf = self.get_confidence()
|
| - if cf > POSITIVE_SHORTCUT_THRESHOLD:
|
| - if constants._debug:
|
| - sys.stderr.write('%s confidence = %s, we have a'
|
| - 'winner\n' %
|
| - (self._mModel['charsetName'], cf))
|
| - self._mState = constants.eFoundIt
|
| - elif cf < NEGATIVE_SHORTCUT_THRESHOLD:
|
| - if constants._debug:
|
| - sys.stderr.write('%s confidence = %s, below negative'
|
| - 'shortcut threshhold %s\n' %
|
| - (self._mModel['charsetName'], cf,
|
| - NEGATIVE_SHORTCUT_THRESHOLD))
|
| - self._mState = constants.eNotMe
|
| -
|
| - return self.get_state()
|
| -
|
| - def get_confidence(self):
|
| - r = 0.01
|
| - if self._mTotalSeqs > 0:
|
| - r = ((1.0 * self._mSeqCounters[POSITIVE_CAT]) / self._mTotalSeqs
|
| - / self._mModel['mTypicalPositiveRatio'])
|
| - r = r * self._mFreqChar / self._mTotalChar
|
| - if r >= 1.0:
|
| - r = 0.99
|
| - return r
|
|
|