Eqaf_bigstring
type bigstring = (char, Bigarray_compat.int8_unsigned_elt, Bigarray_compat.c_layout) Bigarray_compat.Array1.t
val find_uint8 : ?off:int -> f:(int -> bool) -> bigstring -> int
val exists_uint8 : ?off:int -> f:(int -> bool) -> bigstring -> bool