add rdataset

lib/dns/rdataset.c

@@ -0,0 +1,165 @@
+/*
+ * 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 <stddef.h>
+
+#include <isc/assertions.h>
+
+#include <dns/rdataset.h>
+
+#define RDATASET_MAGIC			0x444E5352U	/* DNSR */
+#define VALID_RDATASET(rdataset)	((rdataset) != NULL && \
+					 (rdataset)->magic == RDATASET_MAGIC)
+
+void
+dns_rdataset_init(dns_rdataset_t *rdataset) {
+
+	/*
+	 * Make 'rdataset' a valid, disassociated rdataset.
+	 */
+
+	REQUIRE(rdataset != NULL);
+
+	rdataset->magic = RDATASET_MAGIC;
+	rdataset->methods = NULL;
+	ISC_LINK_INIT(rdataset, link);
+	rdataset->class = 0;
+	rdataset->type = 0;
+	rdataset->ttl = 0;
+	rdataset->private1 = NULL;
+	rdataset->private2 = NULL;
+	rdataset->private3 = NULL;
+}
+
+void
+dns_rdataset_invalidate(dns_rdataset_t *rdataset) {
+
+	/*
+	 * Invalidate 'rdataset'.
+	 */
+
+	REQUIRE(VALID_RDATASET(rdataset));
+	REQUIRE(rdataset->methods == NULL);
+	
+	rdataset->magic = 0;
+	ISC_LINK_INIT(rdataset, link);
+	rdataset->class = 0;
+	rdataset->type = 0;
+	rdataset->ttl = 0;
+	rdataset->private1 = NULL;
+	rdataset->private2 = NULL;
+	rdataset->private3 = NULL;
+}
+
+void
+dns_rdataset_disassociate(dns_rdataset_t *rdataset) {
+
+	/*
+	 * Disassocate 'rdataset' from its rdata, allowing it to be reused.
+	 */
+
+	REQUIRE(VALID_RDATASET(rdataset));
+
+	(rdataset->methods->disassociate)(rdataset);
+	rdataset->methods = NULL;
+	ISC_LINK_INIT(rdataset, link);
+	rdataset->class = 0;
+	rdataset->type = 0;
+	rdataset->ttl = 0;
+	rdataset->private1 = NULL;
+	rdataset->private2 = NULL;
+	rdataset->private3 = NULL;
+}
+
+dns_result_t
+dns_rdataset_first(dns_rdataset_t *rdataset) {
+
+	/*
+	 * Move the rdata cursor to the first rdata in the rdataset (if any).
+	 */
+
+	REQUIRE(VALID_RDATASET(rdataset));
+
+	return ((rdataset->methods->first)(rdataset));
+}
+
+dns_result_t
+dns_rdataset_next(dns_rdataset_t *rdataset) {
+
+	/*
+	 * Move the rdata cursor to the next rdata in the rdataset (if any).
+	 */
+
+	REQUIRE(VALID_RDATASET(rdataset));
+
+	return ((rdataset->methods->next)(rdataset));
+}
+
+void
+dns_rdataset_current(dns_rdataset_t *rdataset, dns_rdata_t *rdata) {
+
+	/*
+	 * Make 'rdata' refer to the current rdata.
+	 */
+
+	REQUIRE(VALID_RDATASET(rdataset));
+
+	(rdataset->methods->current)(rdataset, rdata);
+}
+
+dns_result_t
+dns_rdataset_totext(dns_rdataset_t *rdataset,
+		    dns_name_t *owner_name,
+		    isc_boolean_t omit_final_dot,
+		    isc_buffer_t *target)
+{
+
+	/*
+	 * Convert 'rdataset' to text format, storing the result in 'target'.
+	 */
+
+	REQUIRE(VALID_RDATASET(rdataset));
+
+	/* XXX stop warnings. */
+	owner_name = NULL;
+	omit_final_dot = ISC_FALSE;
+	target = NULL;
+
+	return (DNS_R_NOTIMPLEMENTED);
+}
+
+dns_result_t
+dns_rdataset_towire(dns_rdataset_t *rdataset,
+		    dns_name_t *owner_name,
+		    dns_compress_t *cctx,
+		    isc_buffer_t *target)
+{
+
+	/*
+	 * Convert 'rdataset' to wire format, compressing names as specified
+	 * in cctx, and storing the result in 'target'.
+	 */
+
+	/* XXX stop warnings. */
+	owner_name = NULL;
+	cctx = NULL;
+	target = NULL;
+
+	REQUIRE(VALID_RDATASET(rdataset));
+
+	return (DNS_R_NOTIMPLEMENTED);
+}