# File lib/CharDistributionAnalysis.rb, line 57
        def feed(aStr, aCharLen)
            #"""feed a character with known length"""
            if aCharLen == 2
                # we only care about 2-bytes character in our distribution analysis
                order = get_order(aStr)
            else
                order = -1
            end
            if order >= 0
                @_mTotalChars += 1
                # order is valid
                if order < @_mTableSize
                    if 512 > @_mCharToFreqOrder[order]
                        @_mFreqChars += 1
                    end
                end
            end
        end