val array_unsafe_get : 'a array -> int -> 'aval char_unsafe_of_byte : int -> charval char_to_byte : char -> intval bytes_unsafe_set : bytes -> int -> char -> unitval bytes_unsafe_to_string : bytes -> stringval bytes_unsafe_blit_string : string -> int -> bytes -> int -> int -> unitval string_length : string -> intval string_equal : string -> string -> boolval string_compare : string -> string -> intval string_safe_get : string -> int -> charval string_unsafe_get : string -> int -> charval unsafe_string_sub : string -> int -> int -> string