Function tlv_update_fields_

wire/tlvstream.c:376–420

}

void tlv_update_fields_(const struct tlv_record_type *types,
			size_t num_types,
			const void *record,
			struct tlv_field **tlv_fields)
{
	/* We merge unknown fields from record */
	const struct tlv_field *field, *end;
	struct tlv_field *fields = tal_arr(record, struct tlv_field, 0);

	field = first_unknown_field(*tlv_fields, &end);

	for (size_t i = 0; i < num_types; i++) {
		struct tlv_field f;
		u8 *val;
		if (i != 0)
			assert(types[i].type > types[i-1].type);

		/* Add any unknowns which precede this. */
		while (field && field->numtype < types[i].type) {
			tal_steal(fields, field->value);
			tal_arr_expand(&fields, *field);
			field = next_unknown_field(field, end);
		}

		val = types[i].towire(NULL, record);
		if (!val)
			continue;

		f.meta = &types[i];
		f.numtype = types[i].type;
		f.length = tal_bytelen(val);
		f.value = tal_steal(fields, val);
		tal_arr_expand(&fields, f);
	}

	/* Add any unknowns at the end. */
	while (field) {
		tal_steal(fields, field->value);
		tal_arr_expand(&fields, *field);
		field = next_unknown_field(field, end);
	}

	tal_free(*tlv_fields);
	*tlv_fields = fields;
}