contrib/bind-9.2.4rc7/lib/dns/rdatasetiter.c

   1 /*
   2  * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 1999-2001  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  10  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  11  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  12  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  13  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  14  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  15  * PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 /* $Id: rdatasetiter.c,v 1.11.2.1 2004/03/09 06:11:06 marka Exp $ */
  19
  20 #include <config.h>
  21
  22 #include <stddef.h>
  23
  24 #include <isc/util.h>
  25
  26 #include <dns/rdataset.h>
  27 #include <dns/rdatasetiter.h>
  28
  29 void
  30 dns_rdatasetiter_destroy(dns_rdatasetiter_t **iteratorp) {
  31         /*
  32          * Destroy '*iteratorp'.
  33          */
  34
  35         REQUIRE(iteratorp != NULL);
  36         REQUIRE(DNS_RDATASETITER_VALID(*iteratorp));
  37
  38         (*iteratorp)->methods->destroy(iteratorp);
  39
  40         ENSURE(*iteratorp == NULL);
  41 }
  42
  43 isc_result_t
  44 dns_rdatasetiter_first(dns_rdatasetiter_t *iterator) {
  45         /*
  46          * Move the rdataset cursor to the first rdataset at the node (if any).
  47          */
  48
  49         REQUIRE(DNS_RDATASETITER_VALID(iterator));
  50
  51         return (iterator->methods->first(iterator));
  52 }
  53
  54 isc_result_t
  55 dns_rdatasetiter_next(dns_rdatasetiter_t *iterator) {
  56         /*
  57          * Move the rdataset cursor to the next rdataset at the node (if any).
  58          */
  59
  60         REQUIRE(DNS_RDATASETITER_VALID(iterator));
  61
  62         return (iterator->methods->next(iterator));
  63 }
  64
  65 void
  66 dns_rdatasetiter_current(dns_rdatasetiter_t *iterator,
  67                          dns_rdataset_t *rdataset)
  68 {
  69         /*
  70          * Return the current rdataset.
  71          */
  72
  73         REQUIRE(DNS_RDATASETITER_VALID(iterator));
  74         REQUIRE(DNS_RDATASET_VALID(rdataset));
  75         REQUIRE(! dns_rdataset_isassociated(rdataset));
  76
  77         iterator->methods->current(iterator, rdataset);
  78 }