Method ForPosition

private/attrrange/attrrange.go:77–103

ForPosition returns attribute index that apply to the specified position. Returns ErrNotFound when the requested position wasn't found in any of the known ranges.

(pos int)

// Returns ErrNotFound when the requested position wasn't found in any of the
// known ranges.
func (t *Tracker) ForPosition(pos int) (*AttrRange, error) {
	if ar, ok := t.ranges[pos]; ok {
		return ar, nil
	}

	var keys []int
	for k := range t.ranges {
		keys = append(keys, k)
	}
	sort.Ints(keys)

	var res *AttrRange
	for _, k := range keys {
		ar := t.ranges[k]
		if ar.Low > pos {
			break
		}
		if ar.High > pos {
			res = ar
		}
	}

	if res == nil {
		return nil, fmt.Errorf("did not find attribute range for position %d", pos)
	}
	return res, nil
}