Function set_feature_bit

common/features.c:290–302

BOLT #1: * * All data fields are unsigned big-endian unless otherwise specified. */

 * All data fields are unsigned big-endian unless otherwise specified.
 */
void set_feature_bit(u8 **ptr, u32 bit)
{
	size_t len = tal_count(*ptr);
	if (bit / 8 >= len) {
		size_t newlen = (bit / 8) + 1;
		u8 *newarr = tal_arrz(tal_parent(*ptr), u8, newlen);
		memcpy(newarr + (newlen - len), *ptr, len);
		tal_free(*ptr);
		*ptr = newarr;
		len = newlen;
	}
	(*ptr)[len - 1 - bit / 8] |= (1 << (bit % 8));
}

static bool test_bit(const u8 *features, size_t byte, unsigned int bit)
{