# File lib/SingleByteCharSetProber.rb, line 68
        def feed(aBuf)
            unless @_mModel['keepEnglishLetter']
                aBuf = filter_without_english_letters(aBuf)
            end
            aLen = aBuf.length
            unless aLen
                return get_state()
            end                        
            
            for i in 0...aLen
                c = aBuf[i]
                order = @_mModel['charToOrderMap'][c]
                if order < SYMBOL_CAT_ORDER
                    @_mTotalChar += 1
                end
                if order < SAMPLE_SIZE                    
                    @_mFreqChar += 1
                    if @_mLastOrder < SAMPLE_SIZE
                        @_mTotalSeqs += 1
                        unless @_mReversed
                            @_mSeqCounters[@_mModel['precedenceMatrix'][(@_mLastOrder * SAMPLE_SIZE) + order]] += 1                        
                        else # reverse the order of the letters in the lookup
                            @_mSeqCounters[@_mModel['precedenceMatrix'][(order * SAMPLE_SIZE) + @_mLastOrder]] += 1
                        end
                    end
                end
                @_mLastOrder = order
            end

            if get_state() == :Detecting
                if @_mTotalSeqs > SB_ENOUGH_REL_THRESHOLD
                    cf = get_confidence()
                    if cf > POSITIVE_SHORTCUT_THRESHOLD
                        if DEBUG
                            p('%s confidence = %s, we have a winner\n' % [@_mModel['charsetName'], cf])
                        end
                        @_mState = :FoundIt
                    elsif cf < NEGATIVE_SHORTCUT_THRESHOLD
                        if DEBUG
                            p('%s confidence = %s, below negative shortcut threshhold %s\n' % [@_mModel['charsetName'], cf, NEGATIVE_SHORTCUT_THRESHOLD])
                        end
                        @_mState = :NotMe
                    end
                end
            end

            return get_state()
        end