1 files changed, 102 insertions, 0 deletions
diff --git a/src/libknot/updates/changesets.h b/src/libknot/updates/changesets.h
new file mode 100644
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+++ b/src/libknot/updates/changesets.h
@@ -0,0 +1,102 @@
+/*!
+ * \file changesets.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Structure for representing IXFR/DDNS changeset and its API.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_CHANGESETS_H_
+#define _KNOT_CHANGESETS_H_
+
+#include "rrset.h"
+
+/*! \todo Changeset must be serializable/deserializable, so
+ *        all data and pointers have to be changeset-exclusive,
+ *        or more advanced structure serialization scheme has to be
+ *        implemented.
+ *
+ * \todo Preallocation of space for changeset.
+ */
+typedef struct {
+	knot_rrset_t *soa_from;
+	knot_rrset_t **remove;
+	size_t remove_count;
+	size_t remove_allocated;
+
+	knot_rrset_t *soa_to;
+	knot_rrset_t **add;
+	size_t add_count;
+	size_t add_allocated;
+
+	uint8_t *data;
+	size_t size;
+	size_t allocated;
+	uint32_t serial_from;
+	uint32_t serial_to;
+} knot_changeset_t;
+
+/*----------------------------------------------------------------------------*/
+
+typedef struct {
+	knot_changeset_t *sets;
+	size_t count;
+	size_t allocated;
+	knot_rrset_t *first_soa;
+} knot_changesets_t;
+
+/*----------------------------------------------------------------------------*/
+
+typedef enum {
+	XFRIN_CHANGESET_ADD,
+	XFRIN_CHANGESET_REMOVE
+} xfrin_changeset_part_t;
+
+/*----------------------------------------------------------------------------*/
+
+int knot_changeset_allocate(knot_changesets_t **changesets);
+
+int knot_changeset_add_rrset(knot_rrset_t ***rrsets,
+                             size_t *count, size_t *allocated,
+                             knot_rrset_t *rrset);
+
+int knot_changeset_add_rr(knot_rrset_t ***rrsets, size_t *count,
+                          size_t *allocated, knot_rrset_t *rr);
+
+int knot_changeset_add_new_rr(knot_changeset_t *changeset,
+                              knot_rrset_t *rrset,
+                              xfrin_changeset_part_t part);
+
+void knot_changeset_store_soa(knot_rrset_t **chg_soa,
+                              uint32_t *chg_serial, knot_rrset_t *soa);
+
+int knot_changeset_add_soa(knot_changeset_t *changeset, knot_rrset_t *soa,
+                           xfrin_changeset_part_t part);
+
+int knot_changesets_check_size(knot_changesets_t *changesets);
+
+void knot_free_changeset(knot_changeset_t **changeset);
+
+void knot_free_changesets(knot_changesets_t **changesets);
+
+#endif /* _KNOT_CHANGESETS_H_ */
+
+/*! @} */