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improvements to the QP iterator

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- make iterators reversible: refactor dns_qpiter_next() and add a new
  dns_qpiter_prev() function to support iterating both forwards and
  backwards through a QP trie.
- added a 'name' parameter to dns_qpiter_next() (as well as _prev())
  to make it easier to retrieve the nodename while iterating, without
  having to construct it from pointer value data.
This commit is contained in:
Evan Hunt
2023-09-19 00:41:57 -07:00
parent 7f0242b8c7
commit 3bf23fadb0
8 changed files with 210 additions and 70 deletions
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6
lib/dns/nta.c
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@@ -480,7 +480,7 @@ dns_ntatable_totext(dns_ntatable_t *ntatable, const char *view,
dns_qpmulti_query(ntatable->table, &qpr);
dns_qpiter_init(&qpr, &iter);
while (dns_qpiter_next(&iter, &pval, NULL) == ISC_R_SUCCESS) {
while (dns_qpiter_next(&iter, NULL, &pval, NULL) == ISC_R_SUCCESS) {
dns__nta_t *n = pval;
char nbuf[DNS_NAME_FORMATSIZE];
char tbuf[ISC_FORMATHTTPTIMESTAMP_SIZE];
@@ -536,7 +536,7 @@ dns_ntatable_save(dns_ntatable_t *ntatable, FILE *fp) {
dns_qpmulti_query(ntatable->table, &qpr);
dns_qpiter_init(&qpr, &iter);
while (dns_qpiter_next(&iter, &pval, NULL) == ISC_R_SUCCESS) {
while (dns_qpiter_next(&iter, NULL, &pval, NULL) == ISC_R_SUCCESS) {
dns__nta_t *n = pval;
isc_buffer_t b;
char nbuf[DNS_NAME_FORMATSIZE + 1], tbuf[80];
@@ -620,7 +620,7 @@ dns_ntatable_shutdown(dns_ntatable_t *ntatable) {
ntatable->shuttingdown = true;
dns_qpiter_init(&qpr, &iter);
while (dns_qpiter_next(&iter, &pval, NULL) == ISC_R_SUCCESS) {
while (dns_qpiter_next(&iter, NULL, &pval, NULL) == ISC_R_SUCCESS) {
dns__nta_t *n = pval;
dns__nta_shutdown(n);
dns__nta_detach(&n);