def unb64u.pad
import bend-kit-jwt@0.11.0.1/jwt.bend as Jwtimport Base
122# Padding for n mod 4 chars; 1 is never a whole group, so it gets a NUL.
123def unb64u.pad(+r: U32, acc: String) -> String:
124 match r:
125 case 2:
126 SCon{'=', SCon{'=', acc}}
127 case 3:
128 SCon{'=', acc}
129 case 1:
130 SCon{Chr{0}, acc}
131 case _:
132 acc