Function sixbit_from_b64

ccan/ccan/base64/base64.c:28–40

* sixbit_from_b64 - maps a base64-alphabet character to its 6-bit value * @param maps A base 64 maps structure (see base64_init_maps) * @param sixbit Six-bit value to map * @return a six-bit value */

 * @return a six-bit value
 */
static int8_t sixbit_from_b64(const base64_maps_t *maps,
			      const unsigned char b64letter)
{
	int8_t ret;

	ret = maps->decode_map[(unsigned char)b64letter];
	if (ret == (int8_t)'\xff') {
		errno = EDOM;
		return -1;
	}

	return ret;
}

bool base64_char_in_alphabet(const base64_maps_t *maps, const char b64char)
{