'feed a character with known length'

def feed(self, aBuf, aCharLen):

    if (aCharLen == 2):
        order = self.get_order(aBuf)
    else:
        order = (-1)
    if (order >= 0):
        self._mTotalChars += 1
        if (order < self._mTableSize):
            if (512 > self._mCharToFreqOrder[order]):
                self._mFreqChars += 1
