Function ExactLen

codec/codec.go:427–440

ExactLen would calculate the total number of UIDs. Instead of using a UidPack, it accepts blocks, so we can calculate the number of uids after a seek.

(pack *pb.UidPack)

// ExactLen would calculate the total number of UIDs. Instead of using a UidPack, it accepts blocks,
// so we can calculate the number of uids after a seek.
func ExactLen(pack *pb.UidPack) int {
	if pack == nil {
		return 0
	}
	sz := len(pack.Blocks)
	if sz == 0 {
		return 0
	}
	num := 0
	for _, b := range pack.Blocks {
		num += int(b.NumUids) // NumUids includes the base UID.
	}
	return num
}

// Decode decodes the UidPack back into the list of uids. This is a stop-gap function, Decode would
// need to do more specific things than just return the list back.