From 568720334aa630ea504b2ce3b8c324f0a557d6e6 Mon Sep 17 00:00:00 2001 From: k clair Date: Tue, 9 Oct 2012 13:14:36 -0700 Subject: add source files from upstream --- .../requests/packages/chardet/jpcntx.py | 210 +++++++++++++++++++++ 1 file changed, 210 insertions(+) create mode 100755 requests-0.14.0/requests/packages/chardet/jpcntx.py (limited to 'requests-0.14.0/requests/packages/chardet/jpcntx.py') diff --git a/requests-0.14.0/requests/packages/chardet/jpcntx.py b/requests-0.14.0/requests/packages/chardet/jpcntx.py new file mode 100755 index 0000000..93db4a9 --- /dev/null +++ b/requests-0.14.0/requests/packages/chardet/jpcntx.py @@ -0,0 +1,210 @@ +######################## BEGIN LICENSE BLOCK ######################## +# The Original Code is Mozilla Communicator client 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 constants + +NUM_OF_CATEGORY = 6 +DONT_KNOW = -1 +ENOUGH_REL_THRESHOLD = 100 +MAX_REL_THRESHOLD = 1000 +MINIMUM_DATA_THRESHOLD = 4 + +# This is hiragana 2-char sequence table, the number in each cell represents its frequency category +jp2CharContext = ( \ +(0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1), +(2,4,0,4,0,3,0,4,0,3,4,4,4,2,4,3,3,4,3,2,3,3,4,2,3,3,3,2,4,1,4,3,3,1,5,4,3,4,3,4,3,5,3,0,3,5,4,2,0,3,1,0,3,3,0,3,3,0,1,1,0,4,3,0,3,3,0,4,0,2,0,3,5,5,5,5,4,0,4,1,0,3,4), 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+(0,4,0,3,0,3,0,3,0,3,5,5,3,3,3,3,4,3,4,3,3,3,4,4,4,3,3,3,3,4,3,5,3,3,1,3,2,4,5,5,5,5,4,3,4,5,5,3,2,2,3,3,3,3,2,3,3,1,2,3,2,4,3,3,3,4,0,4,0,2,0,4,3,2,2,1,2,0,3,0,0,4,1), +) + +class JapaneseContextAnalysis: + def __init__(self): + self.reset() + + def reset(self): + self._mTotalRel = 0 # total sequence received + self._mRelSample = [0] * NUM_OF_CATEGORY # category counters, each interger counts sequence in its category + self._mNeedToSkipCharNum = 0 # if last byte in current buffer is not the last byte of a character, we need to know how many bytes to skip in next buffer + self._mLastCharOrder = -1 # The order of previous char + self._mDone = constants.False # If this flag is set to constants.True, detection is done and conclusion has been made + + def feed(self, aBuf, aLen): + if self._mDone: return + + # The buffer we got is byte oriented, and a character may span in more than one + # buffers. In case the last one or two byte in last buffer is not complete, we + # record how many byte needed to complete that character and skip these bytes here. + # We can choose to record those bytes as well and analyse the character once it + # is complete, but since a character will not make much difference, by simply skipping + # this character will simply our logic and improve performance. + i = self._mNeedToSkipCharNum + while i < aLen: + order, charLen = self.get_order(aBuf[i:i+2]) + i += charLen + if i > aLen: + self._mNeedToSkipCharNum = i - aLen + self._mLastCharOrder = -1 + else: + if (order != -1) and (self._mLastCharOrder != -1): + self._mTotalRel += 1 + if self._mTotalRel > MAX_REL_THRESHOLD: + self._mDone = constants.True + break + self._mRelSample[jp2CharContext[self._mLastCharOrder][order]] += 1 + self._mLastCharOrder = order + + def got_enough_data(self): + return self._mTotalRel > ENOUGH_REL_THRESHOLD + + def get_confidence(self): + # This is just one way to calculate confidence. It works well for me. + if self._mTotalRel > MINIMUM_DATA_THRESHOLD: + return (self._mTotalRel - self._mRelSample[0]) / self._mTotalRel + else: + return DONT_KNOW + + def get_order(self, aStr): + return -1, 1 + +class SJISContextAnalysis(JapaneseContextAnalysis): + def get_order(self, aStr): + if not aStr: return -1, 1 + # find out current char's byte length + if ((aStr[0] >= '\x81') and (aStr[0] <= '\x9F')) or \ + ((aStr[0] >= '\xE0') and (aStr[0] <= '\xFC')): + charLen = 2 + else: + charLen = 1 + + # return its order if it is hiragana + if len(aStr) > 1: + if (aStr[0] == '\202') and \ + (aStr[1] >= '\x9F') and \ + (aStr[1] <= '\xF1'): + return ord(aStr[1]) - 0x9F, charLen + + return -1, charLen + +class EUCJPContextAnalysis(JapaneseContextAnalysis): + def get_order(self, aStr): + if not aStr: return -1, 1 + # find out current char's byte length + if (aStr[0] == '\x8E') or \ + ((aStr[0] >= '\xA1') and (aStr[0] <= '\xFE')): + charLen = 2 + elif aStr[0] == '\x8F': + charLen = 3 + else: + charLen = 1 + + # return its order if it is hiragana + if len(aStr) > 1: + if (aStr[0] == '\xA4') and \ + (aStr[1] >= '\xA1') and \ + (aStr[1] <= '\xF3'): + return ord(aStr[1]) - 0xA1, charLen + + return -1, charLen -- cgit v1.2.3