bind/lib/dns/dbiterator.c

/*
 * Copyright (C) 1999  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.
 */

#include <config.h>

#include <stddef.h>

#include <isc/assertions.h>

#include <dns/dbiterator.h>
#include <dns/name.h>

void
dns_dbiterator_destroy(dns_dbiterator_t **iteratorp) {
	/*
	 * Destroy '*iteratorp'.
	 */

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

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

	ENSURE(*iteratorp == NULL);
}

dns_result_t
dns_dbiterator_first(dns_dbiterator_t *iterator) {
	/*
	 * Move the node cursor to the first node in the database (if any).
	 */

	REQUIRE(DNS_DBITERATOR_VALID(iterator));

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

dns_result_t
dns_dbiterator_next(dns_dbiterator_t *iterator) {
	/*
	 * Move the node cursor to the next node in the database (if any).
	 */

	REQUIRE(DNS_DBITERATOR_VALID(iterator));

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

dns_result_t
dns_dbiterator_current(dns_dbiterator_t *iterator, dns_dbnode_t **nodep,
		       dns_name_t *name)
{
	/*
	 * Return the current node.
	 */

	REQUIRE(DNS_DBITERATOR_VALID(iterator));
	REQUIRE(nodep != NULL && *nodep == NULL);
	REQUIRE(name == NULL || dns_name_hasbuffer(name));

	return (iterator->methods->current(iterator, nodep, name));
}

dns_result_t
dns_dbiterator_pause(dns_dbiterator_t *iterator) {
	/*
	 * Pause iteration.
	 */

	REQUIRE(DNS_DBITERATOR_VALID(iterator));

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

dns_result_t
dns_dbiterator_origin(dns_dbiterator_t *iterator, dns_name_t *name,
		      isc_buffer_t *target)
{
	/*
	 * Return the origin to which returned node names are relative.
	 */

	REQUIRE(DNS_DBITERATOR_VALID(iterator));
	REQUIRE(iterator->relative_names);
	
	return (iterator->methods->origin(iterator, name, target));
}