signed char base64_decode_value(signed char value_in)
{
	static const signed char decoding[] = {
		62, -1, -1, -1, 63, 52, 53, 54,
		55, 56, 57, 58, 59, 60, 61, -1,
		-1, -1, -2, -1, -1, -1, 0, 1,
		2,  3, 4, 5, 6, 7, 8, 9,
		10, 11, 12, 13, 14, 15, 16, 17,
		18, 19, 20, 21, 22, 23, 24, 25,
		-1, -1, -1, -1, -1, -1, 26, 27,
		28, 29, 30, 31, 32, 33, 34, 35,
		36, 37, 38, 39, 40, 41, 42, 43,
		44, 45, 46, 47, 48, 49, 50, 51
	};
	value_in -= 43;
	if (value_in < 0 || value_in >= 80)
		return -1;
	return decoding[(int)value_in];
}
signed char base64_decode_value(signed char value_in)
{
	static const signed char decoding[] = {
		62, -1, -1, -1, 63, 52, 53, 54,
		55, 56, 57, 58, 59, 60, 61, -1,
		-1, -1, -2, -1, -1, -1, 0, 1,
		2,  3, 4, 5, 6, 7, 8, 9,
		10, 11, 12, 13, 14, 15, 16, 17,
		18, 19, 20, 21, 22, 23, 24, 25,
		-1, -1, -1, -1, -1, -1, 26, 27,
		28, 29, 30, 31, 32, 33, 34, 35,
		36, 37, 38, 39, 40, 41, 42, 43,
		44, 45, 46, 47, 48, 49, 50, 51
	};
	value_in -= 43;
	if (value_in < 0 || value_in >= 80)
		return -1;
	return decoding[(int)value_in];
}