val equal : t -> t -> bool
val digest_bytes : Bytes.t -> int -> int -> t -> t
val unsafe_digest_bytes : Bytes.t -> int -> int -> t -> t
val digest_string : String.t -> int -> int -> t -> t
val unsafe_digest_string : String.t -> int -> int -> t -> t
val digest_bigstring : bigstring -> int -> int -> t -> t
val unsafe_digest_bigstring : bigstring -> int -> int -> t -> t