Misc.LongString
val create : int -> t
val length : t -> int
val get : t -> int -> char
val set : t -> int -> char -> unit
val blit_string : string -> int -> t -> int -> int -> unit
val output : out_channel -> t -> int -> int -> unit
val input_bytes_into : t -> in_channel -> int -> unit
val input_bytes : in_channel -> int -> t