1 files changed, 57 insertions, 0 deletions
diff --git a/lib/getversion.c b/lib/getversion.c
new file mode 100644
index 000000000..eca294599
--- /dev/null
+++ b/lib/getversion.c
@@ -0,0 +1,57 @@
+/* getversion.c -- select backup filename type
+   Copyright (C) 1990 Free Software Foundation, Inc.
+
+   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 2, 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* Written by David MacKenzie <djm@gnu.ai.mit.edu> */
+
+#include "backupfile.h"
+
+#ifdef STDC_HEADERS
+#include <stdlib.h>
+#endif
+
+int argmatch ();
+void invalid_arg ();
+
+extern char *program_name;
+
+static char *backup_args[] =
+{
+  "never", "simple", "nil", "existing", "t", "numbered", 0
+};
+
+static enum backup_type backup_types[] =
+{
+  simple, simple, numbered_existing, numbered_existing, numbered, numbered
+};
+
+/* Return the type of backup indicated by VERSION.
+   Unique abbreviations are accepted. */
+
+enum backup_type
+get_version (version)
+     char *version;
+{
+  int i;
+
+  if (version == 0 || *version == 0)
+    return numbered_existing;
+  i = argmatch (version, backup_args);
+  if (i >= 0)
+    return backup_types[i];
+  invalid_arg ("version control type", version, i);
+  exit (1);
+}