--- ray/src/hd/rhdriver.h	1999/03/04 10:29:23	3.20
+++ ray/src/hd/rhdriver.h	2003/07/14 22:24:00	3.23
@@ -1,13 +1,16 @@
-/* Copyright (c) 1999 Silicon Graphics, Inc. */
-
-/* SCCSid "$SunId$ SGI" */
-
+/* RCSid: $Id: rhdriver.h,v 3.23 2003/07/14 22:24:00 schorsch Exp $ */
 /*
  * Header file for holodeck device driver routines.
  */
+#ifndef _RAD_RHDRIVER_H_
+#define _RAD_RHDRIVER_H_
 
 #include "view.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 extern struct driver {
 	char	*name;		/* holodeck name or title */
 	VIEW	v;		/* base view parameters */
@@ -165,4 +168,11 @@ Set odev.v.type=0 and odev.hres=odev.vres=0 when done.
 
 extern VIEW	*dev_auxview();
 
-extern int2	*beam_view();
+extern int16	*beam_view();
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _RAD_RHDRIVER_H_ */
+