--- /dev/null
+/*
+ * Dealing with identifiers
+ *
+ * Copyright (C) 2014 Red Hat, Inc.
+ *
+ * Authors:
+ * Markus Armbruster <armbru@redhat.com>,
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.1
+ * or later. See the COPYING.LIB file in the top-level directory.
+ */
+
+#include "qemu-common.h"
+
+bool id_wellformed(const char *id)
+{
+ int i;
+
+ if (!qemu_isalpha(id[0])) {
+ return false;
+ }
+ for (i = 1; id[i]; i++) {
+ if (!qemu_isalnum(id[i]) && !strchr("-._", id[i])) {
+ return false;
+ }
+ }
+ return true;
+}