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 {

			return 0
		}
		if inv == 0xff {
			return ^int64(x)
		}
		return int64(x)
	}

	// Normal case is base-8 (octal) format.
	return p.parseOctal(b)
}

// formatNumeric encodes x into b using base-8 (octal) encoding if possible.
// Otherwise it will attempt to use base-256 (binary) encoding.
func (f *formatter) formatNumeric(b []byte, x int64) {
	if fitsInOctal(len(b), x) {
		f.formatOctal(b, x)

		}
		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

}

// Test the predicted part size from the part index
func TestGetPartSizeFromIdx(t *testing.T) {
	// Create test cases
	testCases := []struct {
		totalSize    int64
		partSize     int64
		partIndex    int
		expectedSize int64
	}{
		// Total size is zero
		{0, 10, 1, 0},
		// part size 2MiB, total size 4MiB
		{4 * humanize.MiByte, 2 * humanize.MiByte, 1, 2 * humanize.MiByte},

	bts := make([]byte, 0, v.Msgsize())
	bts, _ = v.MarshalMsg(bts[0:0])
	b.SetBytes(int64(len(bts)))
	b.ReportAllocs()
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		bts, _ = v.MarshalMsg(bts[0:0])
	}
}

func BenchmarkUnmarshalMetricDescription(b *testing.B) {
	v := MetricDescription{}
	bts, _ := v.MarshalMsg(nil)
	b.ReportAllocs()
	b.SetBytes(int64(len(bts)))
	b.ResetTimer()
	for i := 0; i < b.N; i++ {

	if int64(len(b)) > fr.nb {
		b = b[:fr.nb]
	}
	if len(b) > 0 {
		n, err = fr.r.Read(b)
		fr.nb -= int64(n)
	}
	switch {
	case err == io.EOF && fr.nb > 0:
		return n, io.ErrUnexpectedEOF
	case err == nil && fr.nb == 0:
		return n, io.EOF
	default:
		return n, err
	}
}

func (fr *regFileReader) WriteTo(w io.Writer) (int64, error) {

					}, nil},
					testReadFrom{fileOps{
						int64(1e10 - blockSize),
						strings.Repeat("\x00", blockSize-100) + strings.Repeat("0123456789", 10),
						int64(1e10 - blockSize),
						strings.Repeat("\x00", blockSize-100) + strings.Repeat("0123456789", 10),
						int64(1e10 - blockSize),
						strings.Repeat("\x00", blockSize-100) + strings.Repeat("0123456789", 10),
						int64(1e10 - blockSize),

	}

	for _, f := range fields {
		checkSchemaField(t, user, f, func(f *schema.Field) {})
	}
}

type (
	ID      int64
	INT     int
	INT8    int8
	INT16   int16
	INT32   int32
	INT64   int64
	UINT    uint
	UINT8   uint8
	UINT16  uint16
	UINT32  uint32
	UINT64  uint64
	FLOAT32 float32
	FLOAT64 float64
	BOOL    bool
	STRING  string

}

// ShardSize - returns actual shared size from erasure blockSize.
func (e *Erasure) ShardSize() int64 {
	return ceilFrac(e.blockSize, int64(e.dataBlocks))
}

// ShardFileSize - returns final erasure size from original size.
func (e *Erasure) ShardFileSize(totalLength int64) int64 {
	if totalLength == 0 {
		return 0
	}
	if totalLength == -1 {
		return -1
	}

			timeToResponse  time.Duration
			timeToFirstByte time.Duration
			outputBytes     int64 = -1 // -1: unknown output bytes
			headerBytes     int64
		)

		tc, ok := r.Context().Value(mcontext.ContextTraceKey).(*mcontext.TraceCtxt)
		if ok {
			statusCode = tc.ResponseRecorder.StatusCode
			outputBytes = int64(tc.ResponseRecorder.Size())
			headerBytes = int64(tc.ResponseRecorder.HeaderSize())