Import back-mdb

[openldap] / servers / slapd / back-mdb / nextid.c

diff --git a/servers/slapd/back-mdb/nextid.c b/servers/slapd/back-mdb/nextid.c
new file mode 100644 (file)
index 0000000..1d7b389
--- /dev/null
+++ b/servers/slapd/back-mdb/nextid.c
@@ -0,0 +1,59 @@
+/* init.c - initialize mdb backend */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2000-2011 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+#include <ac/string.h>
+
+#include "back-mdb.h"
+
+int mdb_next_id( BackendDB *be, MDB_txn *tid, ID *out )
+{
+       struct mdb_info *mdb = (struct mdb_info *) be->be_private;
+       int rc;
+       ID id = 0;
+       MDB_val key;
+       MDB_cursor *cursor;
+
+       /* Get a read cursor */
+       rc = mdb_cursor_open( tid, mdb->mi_id2entry, &cursor );
+
+       if (rc == 0) {
+               rc = mdb_cursor_get(cursor, &key, NULL, MDB_LAST);
+               mdb_cursor_close(cursor);
+       }
+
+       switch(rc) {
+       case MDB_NOTFOUND:
+               rc = 0;
+               *out = 1;
+               break;
+       case 0:
+               memcpy( &id, key.mv_data, sizeof( id ));
+               *out = ++id;
+               break;
+
+       default:
+               Debug( LDAP_DEBUG_ANY,
+                       "=> mdb_next_id: get failed: %s (%d)\n",
+                       mdb_strerror(rc), rc, 0 );
+               goto done;
+       }
+
+done:
+       return rc;
+}