def get_order(self, aStr):
# for euc-JP encoding, we are interested
# first byte range: 0xa0 -- 0xfe
# second byte range: 0xa1 -- 0xfe
# no validation needed here. State machine has done that
if aStr[0] >= _bytechar(0xA0):
return 94 * (_byteord(aStr[0]) - 0xA1) + _byteord(aStr[1]) - 0xa1
else:
return -1
def get_order(self, aStr):
# for euc-TW encoding, we are interested
# first byte range: 0xc4 -- 0xfe
# second byte range: 0xa1 -- 0xfe
# no validation needed here. State machine has done that
if aStr[0] >= _bytechar(0xC4):
return 94 * (_byteord(aStr[0]) - 0xC4) + _byteord(aStr[1]) - 0xA1
else:
return -1
def get_order(self, aStr):
# for GB2312 encoding, we are interested
# first byte range: 0xb0 -- 0xfe
# second byte range: 0xa1 -- 0xfe
# no validation needed here. State machine has done that
if (aStr[0] >= _bytechar(0xB0)) and (aStr[1] >= _bytechar(0xA1)):
return 94 * (_byteord(aStr[0]) - 0xB0) + _byteord(aStr[1]) - 0xA1
else:
return -1;
def get_order(self, aStr):
# for big5 encoding, we are interested
# first byte range: 0xa4 -- 0xfe
# second byte range: 0x40 -- 0x7e , 0xa1 -- 0xfe
# no validation needed here. State machine has done that
if aStr[0] >= _bytechar(0xA4):
if aStr[1] >= _bytechar(0xA1):
return 157 * (_byteord(aStr[0]) - 0xA4) + _byteord(aStr[1]) - 0xA1 + 63
else:
return 157 * (_byteord(aStr[0]) - 0xA4) + _byteord(aStr[1]) - 0x40
else:
return -1
def get_order(self, aStr):
# for big5 encoding, we are interested
# first byte range: 0xa4 -- 0xfe
# second byte range: 0x40 -- 0x7e , 0xa1 -- 0xfe
# no validation needed here. State machine has done that
if aStr[0] >= _bytechar(0xA4):
if aStr[1] >= _bytechar(0xA1):
return 157 * (_byteord(aStr[0]) - 0xA4) + _byteord(
aStr[1]) - 0xA1 + 63
else:
return 157 * (_byteord(aStr[0]) - 0xA4) + _byteord(
aStr[1]) - 0x40
else:
return -1
def get_order(self, aStr):
# for sjis encoding, we are interested
# first byte range: 0x81 -- 0x9f , 0xe0 -- 0xfe
# second byte range: 0x40 -- 0x7e, 0x81 -- oxfe
# no validation needed here. State machine has done that
if (_bytechar(0x81) <= aStr[0] <= _bytechar(0x9F)):
order = 188 * (_byteord(aStr[0]) - 0x81)
elif (_bytechar(0xE0) <= aStr[0] <= _bytechar(0xEF)):
order = 188 * (_byteord(aStr[0]) - 0xE0 + 31)
else:
return -1
order = order + _byteord(aStr[1]) - 0x40
if aStr[1] > _bytechar(0x7F):
order = -1
return order
def get_order(self, aStr):
# for sjis encoding, we are interested
# first byte range: 0x81 -- 0x9f , 0xe0 -- 0xfe
# second byte range: 0x40 -- 0x7e, 0x81 -- oxfe
# no validation needed here. State machine has done that
if (_bytechar(0x81) <= aStr[0] <= _bytechar(0x9F)):
order = 188 * (_byteord(aStr[0]) - 0x81)
elif (_bytechar(0xE0) <= aStr[0] <= _bytechar(0xEF)):
order = 188 * (_byteord(aStr[0]) - 0xE0 + 31)
else:
return -1;
order = order + _byteord(aStr[1]) - 0x40
if aStr[1] > _bytechar(0x7F):
order = -1
return order
def next_state(self, c):
# for each byte we get its class
# if it is first byte, we also get byte length
try:
byteCls = self._mModel['classTable'][_byteord(c)]
except IndexError:
return eError
if self._mCurrentState == eStart:
self._mCurrentBytePos = 0
self._mCurrentCharLen = self._mModel['charLenTable'][byteCls]
# from byte's class and stateTable, we get its next state
self._mCurrentState = self._mModel['stateTable'][self._mCurrentState * self._mModel['classFactor'] + byteCls]
self._mCurrentBytePos += 1
return self._mCurrentState
def next_state(self, c):
# for each byte we get its class
# if it is first byte, we also get byte length
try:
byteCls = self._mModel['classTable'][_byteord(c)]
except IndexError:
return eError
if self._mCurrentState == eStart:
self._mCurrentBytePos = 0
self._mCurrentCharLen = self._mModel['charLenTable'][byteCls]
# from byte's class and stateTable, we get its next state
self._mCurrentState = self._mModel['stateTable'][
self._mCurrentState * self._mModel['classFactor'] + byteCls]
self._mCurrentBytePos += 1
return self._mCurrentState
def feed(self, aBuf):
aBuf = self.filter_with_english_letters(aBuf)
for c in aBuf:
try:
charClass = Latin1_CharToClass[_byteord(c)]
except IndexError:
return constants.eError
freq = Latin1ClassModel[(self._mLastCharClass * CLASS_NUM) + charClass]
if freq == 0:
self._mState = constants.eNotMe
break
self._mFreqCounter[freq] += 1
self._mLastCharClass = charClass
return self.get_state()
def feed(self, aBuf):
aBuf = self.filter_with_english_letters(aBuf)
for c in aBuf:
try:
charClass = Latin1_CharToClass[_byteord(c)]
except IndexError:
return constants.eError
freq = Latin1ClassModel[(self._mLastCharClass * CLASS_NUM) +
charClass]
if freq == 0:
self._mState = constants.eNotMe
break
self._mFreqCounter[freq] += 1
self._mLastCharClass = charClass
return self.get_state()
def get_order(self, aStr):
if not aStr: return -1, 1
# find out current char's byte length
try:
if (_bytechar(0x81) <= aStr[0] <= _bytechar(0x9F)) or \
(_bytechar(0xE0) <= aStr[0] <= _bytechar(0xFC)):
charLen = 2
else:
charLen = 1
except UnicodeDecodeError:
return -1, 1
# return its order if it is hiragana
if len(aStr) > 1:
if (aStr[0] == _bytechar(202)) and \
(_bytechar(0x9F) <= aStr[1] <= _bytechar(0xF1)):
return _byteord(aStr[1]) - 0x9F, charLen
return -1, charLen
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:
try:
order = self._mModel['charToOrderMap'][_byteord(c)]
except IndexError:
return constants.eError
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:
self._mSeqCounters[self._mModel['precedenceMatrix'][
(self._mLastOrder * SAMPLE_SIZE) + order]] += 1
else: # reverse the order of the letters in the lookup
self._mSeqCounters[self._mModel['precedenceMatrix'][
(order * SAMPLE_SIZE) + self._mLastOrder]] += 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_order(self, aStr):
if not aStr: return -1, 1
# find out current char's byte length
try:
if (aStr[0] == _bytechar(0x8E)) or \
(_bytechar(0xA1) <= aStr[0] <= _bytechar(0xFE)):
charLen = 2
elif aStr[0] == _bytechar(0x8F):
charLen = 3
else:
charLen = 1
except UnicodeDecodeError:
return -1, 1
# return its order if it is hiragana
if len(aStr) > 1:
if (aStr[0] == _bytechar(0xA4)) and \
(_bytechar(0xA1) <= aStr[1] <= _bytechar(0xF3)):
return _byteord(aStr[1]) - 0xA1, charLen
return -1, charLen
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:
try:
order = self._mModel['charToOrderMap'][_byteord(c)]
except IndexError:
return constants.eError
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:
self._mSeqCounters[self._mModel['precedenceMatrix'][(self._mLastOrder * SAMPLE_SIZE) + order]] += 1
else: # reverse the order of the letters in the lookup
self._mSeqCounters[self._mModel['precedenceMatrix'][(order * SAMPLE_SIZE) + self._mLastOrder]] += 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()
