`sig
val read_ui16 : IO.input -> int
val read_i16 : IO.input -> int
val read_i31 : IO.input -> int
val read_i32 : IO.input -> int
val read_i32_as_int : IO.input -> int
val read_real_i32 : IO.input -> int32
val read_i64 : IO.input -> int64
val read_float32 : IO.input -> float
val read_double : IO.input -> float
val write_ui16 : 'a IO.output -> int -> unit
val write_i16 : 'a IO.output -> int -> unit
val write_i31 : 'a IO.output -> int -> unit
val write_i32 : 'a IO.output -> int -> unit
val write_real_i32 : 'a IO.output -> int32 -> unit
val write_i64 : 'a IO.output -> int64 -> unit
val write_float32 : 'a IO.output -> float -> unit
val write_double : 'a IO.output -> float -> unit
end`