Function readSubStreamsInfo

types.go:487–569

nolint:cyclop,funlen,gocognit

(r util.Reader, folder []*folder)

//nolint:cyclop,funlen,gocognit
func readSubStreamsInfo(r util.Reader, folder []*folder) (*subStreamsInfo, error) {
	s := new(subStreamsInfo)

	id, err := r.ReadByte()
	if err != nil {
		return nil, fmt.Errorf("readSubStreamsInfo: ReadByte error: %w", err)
	}

	s.streams = make([]uint64, len(folder))
	if id == idNumUnpackStream {
		for i := range s.streams {
			if s.streams[i], err = readUint64(r); err != nil {
				return nil, err
			}
		}

		id, err = r.ReadByte()
		if err != nil {
			return nil, fmt.Errorf("readSubStreamsInfo: ReadByte error: %w", err)
		}
	} else {
		for i := range s.streams {
			s.streams[i] = 1
		}
	}

	// Count the files in each stream
	files := uint64(0)
	for _, v := range s.streams {
		files += v
	}

	if err := checkUint64(files, false); err != nil {
		return nil, err
	}

	if id == idSize {
		s.size = make([]uint64, files)
		k := 0

		for i := range s.streams {
			if s.streams[i] == 0 {
				continue
			}

			total := uint64(0)

			for j := uint64(1); j < s.streams[i]; j++ {
				if s.size[k], err = readUint64(r); err != nil {
					return nil, err
				}

				total += s.size[k]
				k++
			}

			s.size[k] = folder[i].unpackSize() - total
			k++