return 0;
}
+
+DnsAnswer *dns_answer_merge(DnsAnswer *a, DnsAnswer *b) {
+ _cleanup_(dns_answer_unrefp) DnsAnswer *ret = NULL;
+ DnsAnswer *k;
+ unsigned i;
+ int r;
+
+ if (a && (!b || b->n_rrs <= 0))
+ return dns_answer_ref(a);
+ if ((!a || a->n_rrs <= 0) && b)
+ return dns_answer_ref(b);
+
+ ret = dns_answer_new((a ? a->n_rrs : 0) + (b ? b->n_rrs : 0));
+ if (!ret)
+ return NULL;
+
+ if (a) {
+ for (i = 0; i < a->n_rrs; i++) {
+ r = dns_answer_add(ret, a->rrs[i]);
+ if (r < 0)
+ return NULL;
+ }
+ }
+
+ if (b) {
+ for (i = 0; i < b->n_rrs; i++) {
+ r = dns_answer_add(ret, b->rrs[i]);
+ if (r < 0)
+ return NULL;
+ }
+ }
+
+ k = ret;
+ ret = NULL;
+
+ return k;
+}