Function unhex_nibble

crates/stdlib/src/binascii.rs:163–170

(c: u8)

    }

    const fn unhex_nibble(c: u8) -> Option<u8> {
        match c {
            b'0'..=b'9' => Some(c - b'0'),
            b'a'..=b'f' => Some(c - b'a' + 10),
            b'A'..=b'F' => Some(c - b'A' + 10),
            _ => None,
        }
    }

    #[pyfunction(name = "a2b_hex")]
    #[pyfunction]