return "unknown"
	}
}

// AccElem holds information for calculating an average value
type AccElem struct {
	Total int64
	Size  int64
	N     int64
}

// Add a duration to a single element.
func (a *AccElem) add(dur time.Duration) {
	if dur < 0 {
		dur = 0
	}
	a.Total += int64(dur)
	a.N++
}

// Merge b into a.
func (a *AccElem) merge(b AccElem) {
	a.N += b.N
	a.Total += b.Total

	// and positive values indicating number of read locks
	lockMap map[string]int64

	// Refresh returns lock not found if set to true
	lockNotFound bool

	// Set to true if you want peers servers to do not respond
	responseDelay int64
}

func (l *lockServer) setRefreshReply(refreshed bool) {
	l.mutex.Lock()
	defer l.mutex.Unlock()

		}
		return start, -1, nil
	}
	if s.Start == nil {
		// Suffix length
		end := int64(*s.End)
		if end < 0 {
			return 0, 0, errors.New("ScanRange: End bigger than file")
		}
		// Suffix length
		return -end, -1, nil
	}
	start = int64(*s.Start)
	end := int64(*s.End)
	return start, end - start + 1, nil
}

// S3Select - filters the contents on a simple structured query language (SQL) statement. It

	n, _ := buf.Write(existingData)
	w := NewWriter(buf)
	w.SetOffset(int64(n))

	for _, wt := range writeTests {
		testCreate(t, w, &wt)
	}

	if err := w.Close(); err != nil {
		t.Fatal(err)
	}

	// read it back
	r, err := NewReader(bytes.NewReader(buf.Bytes()), int64(buf.Len()))
	if err != nil {
		t.Fatal(err)
	}
	for i, wt := range writeTests {

			"login":  fmt.Sprintf("%t", s.Sess.IsLogin()),
			"source": source,
		},
	}
}

func (m *ftpMetrics) log(s *ftp.Context, paths ...string) func(sz int64, err error) {
	startTime := time.Now()
	source := getSource(2)
	return func(sz int64, err error) {
		globalTrace.Publish(ftpTrace(s, startTime, source, strings.Join(paths, " "), err, sz))
	}
}

// Stat implements ftpDriver

	readers       []io.ReaderAt
	orgReaders    []io.ReaderAt
	dataBlocks    int
	offset        int64
	shardSize     int64
	shardFileSize int64
	buf           [][]byte
	readerToBuf   []int
	stashBuffer   []byte
}

// newParallelReader returns parallelReader.
func newParallelReader(readers []io.ReaderAt, e Erasure, offset, totalLength int64) *parallelReader {
	r2b := make([]int, len(readers))
	for i := range r2b {
		r2b[i] = i
	}

	r      *io.PipeReader
	wg     *sync.WaitGroup
	buffer map[int64][]byte
	err    error

	nextOffset int64
	m          sync.Mutex
}

func (w *writerAt) WriteAt(b []byte, offset int64) (n int, err error) {
	w.m.Lock()
	defer w.m.Unlock()

	if w.nextOffset == offset {
		n, err = w.w.Write(b)
		w.nextOffset += int64(n)
	} else {
		if offset > w.nextOffset+ftpMaxWriteOffset {

	{
		var zb0001 int64
		zb0001, err = dc.ReadInt64()
		if err != nil {
			err = msgp.WrapError(err)
			return
		}
		(*z) = BatchJobSize(zb0001)
	}
	return
}

// EncodeMsg implements msgp.Encodable
func (z BatchJobSize) EncodeMsg(en *msgp.Writer) (err error) {
	err = en.WriteInt64(int64(z))
	if err != nil {
		err = msgp.WrapError(err)
		return
	}

)

func TestSizeHistogramToMap(t *testing.T) {
	tests := []struct {
		sizes []int64
		want  map[string]uint64
	}{
		{
			sizes: []int64{100, 1000, 72_000, 100_000},
			want: map[string]uint64{
				"LESS_THAN_1024_B":         2,
				"BETWEEN_64_KB_AND_256_KB": 2,
				"BETWEEN_1024B_AND_1_MB":   2,
			},
		},
		{
			sizes: []int64{100, 1000, 2000, 100_000, 13 * humanize.MiByte},
			want: map[string]uint64{

func HardLimitReader(r io.Reader, n int64) io.Reader { return &HardLimitedReader{r, n} }

// A HardLimitedReader reads from R but limits the amount of
// data returned to just N bytes. Each call to Read
// updates N to reflect the new amount remaining.
// Read returns EOF when N <= 0 or when the underlying R returns EOF.
type HardLimitedReader struct {
	R io.Reader // underlying reader
	N int64     // max bytes remaining
}