91         {0, 0, 0, 0, NULL, NULL, 0},
184         if ((ai) == NULL) {                                  \
220     assert(p != NULL);  in str2number()
223     ep = NULL;  in str2number()
247     return _find_src_addr(&addr.sa, NULL, mark, uid) == 1;  in have_ipv6()
256     return _find_src_addr(&addr.sa, NULL, mark, uid) == 1;  in have_ipv4()
508     assert(pai != NULL);  in explore_null()
510     assert(res != NULL);  in explore_null()
512     *res = NULL;  in explore_null()
513     sentinel.ai_next = NULL;  in explore_null()
532     if (afd == NULL) return 0;  in explore_null()
562     assert(pai != NULL);  in explore_numeric()
565     assert(res != NULL);  in explore_numeric()
567     *res = NULL;  in explore_numeric()
568     sentinel.ai_next = NULL;  in explore_numeric()
577     if (afd == NULL) return 0;  in explore_numeric()
621     assert(pai != NULL);  in explore_numeric_scope()
624     assert(res != NULL);  in explore_numeric_scope()
632     if (afd == NULL) return 0;  in explore_numeric_scope()
637     if (cp == NULL) return explore_numeric(pai, hostname, servname, res, hostname);  in explore_numeric_scope()
643     if (hostname2 == NULL) return EAI_MEMORY;  in explore_numeric_scope()
670     assert(pai != NULL);  in get_canonname()
671     assert(ai != NULL);  in get_canonname()
672     assert(str != NULL);  in get_canonname()
676         if (ai->ai_canonname == NULL) return EAI_MEMORY;  in get_canonname()
686     assert(pai != NULL);  in get_ai()
687     assert(afd != NULL);  in get_ai()
688     assert(addr != NULL);  in get_ai()
691     if (ai == NULL) return NULL;  in get_ai()
705     assert(ai != NULL);  in get_portmatch()
717     assert(ai != NULL);  in get_port()
720     if (servname == NULL) return 0;  in get_port()
757                 proto = NULL;  in get_port()
761         if ((sp = getservbyname(servname, proto)) == NULL) return EAI_SERVICE;  in get_port()
782     if (af == PF_UNSPEC) return NULL;  in find_afd()
786     return NULL;  in find_afd()
795     assert(scope != NULL);  in ip6_str2scopeid()
796     assert(sin6 != NULL);  in ip6_str2scopeid()
797     assert(scopeid != NULL);  in ip6_str2scopeid()
836             return NULL;             \
857     assert(qname != NULL);  in getanswer()
858     assert(pai != NULL);  in getanswer()
862     canonname = NULL;  in getanswer()
873             return NULL; /* XXX should be abort(); */  in getanswer()
887         return (NULL);  in getanswer()
892         return (NULL);  in getanswer()
903             return (NULL);  in getanswer()
999                 if (afd == NULL) {  in getanswer()
1004                 if (cur->ai_next == NULL) had_error++;  in getanswer()
1023     return NULL;  in getanswer()
1359     if (elems == NULL) {  in _rfc6724_sort()
1369         assert(cur != NULL);  in _rfc6724_sort()
1387     elems[nelem - 1].ai->ai_next = NULL;  in _rfc6724_sort()
1459     if (sentinel.ai_next == NULL) {  in dns_getaddrinfo()
1481         *hostf = NULL;  in _endhtent()
1493     assert(name != NULL);  in _gethtent()
1494     assert(pai != NULL);  in _gethtent()
1496     if (!*hostf && !(*hostf = fopen(_PATH_HOSTS, "re"))) return (NULL);  in _gethtent()
1498     if (!(p = fgets(hostbuf, sizeof hostbuf, *hostf))) return (NULL);  in _gethtent()
1506     cname = NULL;  in _gethtent()
1514         if ((cp = strpbrk(cp, " \t")) != NULL) *cp++ = '\0';  in _gethtent()
1739     assert(name != NULL);  in res_queryN()
1815     assert(name != NULL);  in res_searchN()
1816     assert(target != NULL);  in res_searchN()
1832         ret = res_querydomainN(name, NULL, target, res, herrno);  in res_searchN()
1901         ret = res_querydomainN(name, NULL, target, res, herrno);  in res_searchN()
1930     assert(name != NULL);  in res_querydomainN()
1932     if (domain == NULL) {  in res_querydomainN()