3 val byteToChar: Word8.word -> char
4 val bytesToString: Word8Vector.vector -> string
5 val charToByte: char -> Word8.word
6 val packString: Word8Array.array * int * substring -> unit
7 val stringToBytes: string -> Word8Vector.vector
8 val unpackString: Word8ArraySlice.slice -> string
9 val unpackStringVec: Word8VectorSlice.slice -> string