Exemple #1
0
func (l *Layer) ListFiles(after string, limit int) ([]File, error) {
	if limit < 0 {
		return nil, ErrBadArgument
	}

	var query kvl.RangeQuery
	query.Low = fileKey(after)
	query.High = keys.PrefixNext(tuple.MustAppend(nil, "file"))
	if limit > 0 {
		query.Limit = limit + 1
	}
	pairs, err := l.inner.Range(query)
	if err != nil {
		return nil, err
	}

	files := make([]File, 0, len(pairs))
	for _, pair := range pairs {
		var f File
		err := f.fromPair(pair)
		if err != nil {
			return nil, err
		}

		if f.Path > after {
			files = append(files, f)
			if limit > 0 && len(files) == limit {
				break
			}
		}
	}

	return files, nil
}
Exemple #2
0
func (l *Layer) GetLocationContents(id [16]byte, after string, count int) ([]string, error) {
	var rang kvl.RangeQuery
	rang.Low = keys.LexNext(tuple.MustAppend(nil, "locationlist", id, after))
	rang.High = keys.PrefixNext(tuple.MustAppend(nil, "locationlist", id))
	if count > 0 {
		rang.Limit = count + 1
	}

	ps, err := l.index.Range(rang)
	if err != nil {
		return nil, err
	}

	names := make([]string, 0, len(ps))

	for _, p := range ps {
		var typ, name string
		var loc [16]byte
		err := tuple.UnpackInto(p.Key, &typ, &loc, &name)
		if err != nil {
			return nil, err
		}

		if name > after {
			names = append(names, name)
			if count > 0 && len(names) >= count {
				break
			}
		}
	}

	return names, nil
}