lib/dns/rdatasetiter.c

	rdatasetiter.c revision 15a44745412679c30a6d022733925af70a38b715
/*
 * Copyright (C) 1999, 2000  Internet Software Consortium.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
 * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
 * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/* $Id: rdatasetiter.c,v 1.9 2000/07/27 09:46:30 tale Exp $ */

#include <config.h>

#include <stddef.h>

#include <isc/util.h>

#include <dns/rdataset.h>
#include <dns/rdatasetiter.h>

void
dns_rdatasetiter_destroy(dns_rdatasetiter_t **iteratorp) {
    /*
     * Destroy '*iteratorp'.
     */

    REQUIRE(iteratorp != NULL);
    REQUIRE(DNS_RDATASETITER_VALID(*iteratorp));

    (*iteratorp)->methods->destroy(iteratorp);

    ENSURE(*iteratorp == NULL);
}

isc_result_t
dns_rdatasetiter_first(dns_rdatasetiter_t *iterator) {
    /*
     * Move the rdataset cursor to the first rdataset at the node (if any).
     */

    REQUIRE(DNS_RDATASETITER_VALID(iterator));

    return (iterator->methods->first(iterator));
}

isc_result_t
dns_rdatasetiter_next(dns_rdatasetiter_t *iterator) {
    /*
     * Move the rdataset cursor to the next rdataset at the node (if any).
     */

    REQUIRE(DNS_RDATASETITER_VALID(iterator));

    return (iterator->methods->next(iterator));
}

void
dns_rdatasetiter_current(dns_rdatasetiter_t *iterator,
             dns_rdataset_t *rdataset)
{
    /*
     * Return the current rdataset.
     */

    REQUIRE(DNS_RDATASETITER_VALID(iterator));
    REQUIRE(DNS_RDATASET_VALID(rdataset));
    REQUIRE(! dns_rdataset_isassociated(rdataset));

    iterator->methods->current(iterator, rdataset);
}