--- /dev/null
+#include "pirdeviceinfo.h"
+
+#include <string.h>
+
+bool operator< (
+ const DeviceInfo &a,
+ const DeviceInfo &b)
+{
+ if (a.make < b.make) return true;
+
+ if ((a.make == b.make) && (strcmp(a.model, b.model) < 0)) return true;
+
+ return false;
+}