--- ray/src/rt/data.h	1996/02/15 18:46:56	2.3
+++ ray/src/rt/data.h	2003/06/27 06:53:22	2.7
@@ -1,10 +1,12 @@
-/* Copyright (c) 1996 Regents of the University of California */
-
-/* SCCSid "$SunId$ LBL" */
-
+/* RCSid $Id: data.h,v 2.7 2003/06/27 06:53:22 greg Exp $ */
 /*
- *  data.h - header file for routines which interpolate data.
+ * Header for data file loading and computation routines.
  */
+#ifndef _RAD_DATA_H_
+#define _RAD_DATA_H_
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 #define  MAXDDIM	5		/* maximum data dimensions */
 
@@ -27,6 +29,15 @@ typedef struct datarray {
 	struct datarray  *next;		/* next array in list */
 } DATARRAY;			/* a data array */
 
-extern DATARRAY  *getdata(), *getpict();
 
-extern double  datavalue();
+extern DATARRAY	*getdata(char *dname);
+extern DATARRAY	*getpict(char *pname);
+extern void	freedata(DATARRAY *dta);
+extern double	datavalue(DATARRAY *dp, double *pt);
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _RAD_DATA_H_ */
+