sig
val url : string
val ( ++ ) : int -> int -> int
val ( -- ) : int -> int -> int
val ( +| ) : int array -> int array -> int array
val ( -| ) : int array -> int array -> int array
val mkdirs : ?perm:Unix.file_perm -> string -> unit
val split : ('a -> bool) -> 'a list -> 'a list * 'a list
val split_after : int -> 'a list -> 'a list * 'a list
val open_both : string -> string -> Stdlib.in_channel * Stdlib.out_channel
val output_strings :
string list -> (string * string) list -> Stdlib.out_channel -> unit
val output_bytes : int array -> string -> unit
val current_time : unit -> string
end