def b64.val
import bend-kit-bytes@0.3.3.0/bytes.bend as Bytesimport Base
720# A base64 char's value, 64 for '=', or 65.
721def b64.val(+c: U32) -> U32:
722 Bool.pick(U32, in(65, c, 90), (c - 65 : U32), Bool.pick(U32, in(97, c, 122), (c - 71 : U32), Bool.pick(U32, in(48, c, 57), (c + 4 : U32), Bool.pick(U32, U32.is_eq(c, 43), 62, Bool.pick(U32, U32.is_eq(c, 47), 63, Bool.pick(U32, U32.is_eq(c, 61), 64, 65))))))