1 files changed, 83 insertions, 0 deletions
diff --git a/libdb/db_ver.c b/libdb/db_ver.c
new file mode 100644
index 0000000..5ac306d
--- /dev/null
+++ b/libdb/db_ver.c
@@ -0,0 +1,83 @@
+/*
+ * dbver.c: code to read, write and identify the database version no.
+ *
+ * Copyright (C) 1994, 1995 Graeme W. Wilford. (Wilf.)
+ * Copyright (C) 2001, 2002 Colin Watson.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Mon Aug 18 20:35:30 BST 1994  Wilf. (G.Wilford@ee.surrey.ac.uk)
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <string.h>
+#include <stdlib.h>
+
+#include "gettext.h"
+#define _(String) gettext (String)
+
+#include "manconfig.h"
+
+#include "error.h"
+
+#include "mydbm.h"
+
+int dbver_rd (MYDBM_FILE dbfile)
+{
+	datum key, content;
+
+	memset (&key, 0, sizeof key);
+
+	MYDBM_SET (key, xstrdup (VER_KEY));
+
+	content = MYDBM_FETCH (dbfile, key);
+
+	MYDBM_FREE_DPTR (key);
+
+	if (MYDBM_DPTR (content) == NULL) {
+		debug (_("warning: %s has no version identifier\n"), database);
+		return 1;
+	} else if (!STREQ (MYDBM_DPTR (content), VER_ID)) {
+		debug (_("warning: %s is version %s, expecting %s\n"),
+		       database, MYDBM_DPTR (content), VER_ID);
+		MYDBM_FREE_DPTR (content);
+		return 1;
+	} else {
+		MYDBM_FREE_DPTR (content);
+		return 0;
+	}
+}
+
+void dbver_wr (MYDBM_FILE dbfile)
+{
+	datum key, content;
+
+	memset (&key, 0, sizeof key);
+	memset (&content, 0, sizeof content);
+
+	MYDBM_SET (key, xstrdup (VER_KEY));
+	MYDBM_SET (content, xstrdup (VER_ID));
+
+	if (MYDBM_INSERT (dbfile, key, content) != 0)
+		error (FATAL, 0,
+		       _("fatal: unable to insert version identifier into %s"),
+		       database);
+
+	MYDBM_FREE_DPTR (key);
+	MYDBM_FREE_DPTR (content);
+}