Function fromwire_tlv_uint

wire/fromwire.c:89–126

}

static u64 fromwire_tlv_uint(const u8 **cursor, size_t *max, size_t maxlen)
{
	u8 bytes[8];
	size_t length;
	be64 val;

	assert(maxlen <= sizeof(bytes));

	/* BOLT #1:
	 *
	 * - if `length` is not exactly equal to that required for the
	 *   known encoding for `type`:
	 *      - MUST fail to parse the `tlv_stream`.
	 */
	length = *max;
	if (length > maxlen) {
		SUPERVERBOSE("greater than encoding length");
		fromwire_fail(cursor, max);
		return 0;
	}

	memset(bytes, 0, sizeof(bytes));
	fromwire(cursor, max, bytes + sizeof(bytes) - length, length);

	/* BOLT #1:
	 * - if variable-length fields within the known encoding for `type` are
	 *   not minimal:
	 *    - MUST fail to parse the `tlv_stream`.
	 */
	if (length > 0 && bytes[sizeof(bytes) - length] == 0) {
		SUPERVERBOSE("not minimal");
		fromwire_fail(cursor, max);
		return 0;
	}
	BUILD_ASSERT(sizeof(val) == sizeof(bytes));
	memcpy(&val, bytes, sizeof(bytes));
	return be64_to_cpu(val);
}

u16 fromwire_tu16(const u8 **cursor, size_t *max)
{