t.Fatalf("Seek failed: %v", err)
		} else {
			t.Logf("sidx=%d off=%d\n", sidx, off)
		}

		if sidx != 0 {
			if ok, err := cdr.BeginNextSegment(); err != nil {
				t.Fatalf("BeginNextSegment failed: %v", err)
			} else if !ok {
				t.Fatalf("BeginNextSegment return %v on iter %d",
					ok, sidx)
			}
		}
		funcs := allfuncs[sidx]
		for i := range funcs {
			var fp decodecounter.FuncPayload

func (cdr *CounterDataReader) NumSegments() uint32 {
	return cdr.ftr.NumSegments
}

// BeginNextSegment sets up the reader to read the next segment,
// returning TRUE if we do have another segment to read, or FALSE
// if we're done with all the segments (also an error if
// something went wrong).
func (cdr *CounterDataReader) BeginNextSegment() (bool, error) {
	if cdr.segCount >= cdr.ftr.NumSegments {
		return false, nil
	}