--- ray/src/meta/mgvars.h	2003/02/22 02:07:26	1.1
+++ ray/src/meta/mgvars.h	2003/11/14 00:14:40	1.3
@@ -1,4 +1,4 @@
-/* RCSid: $Id: mgvars.h,v 1.1 2003/02/22 02:07:26 greg Exp $ */
+/* RCSid: $Id: mgvars.h,v 1.3 2003/11/14 00:14:40 schorsch Exp $ */
 /*
  *  mgvars.h - header file for graphing routines using variables.
  *
@@ -6,7 +6,17 @@
  *
  *     Greg Ward Larson
  */
+#ifndef _RAD_MGVARS_H_
+#define _RAD_MGVARS_H_
 
+#include <errno.h>
+
+#include "calcomp.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*
  *  Data arrays are used to store point data.
  */
@@ -100,8 +110,18 @@ extern VARIABLE  cparam[MAXCUR][NCVARS];	/* the curve 
 
 extern VARIABLE  *vlookup();
 
-extern double  varvalue(), funvalue();
+#define  mgclear(vname)		undefine(vlookup(vname))
 
-extern int  errno;
+extern void mgclearall(void);
+extern void mgload(char *file);
+extern void mgsave(char *file);
+extern void setmgvar(char *fname, FILE *fp, char *string);
+extern int mgcurve(int c, int (*f)());
+extern void mgtoa(register char *s, VARIABLE *vp);
 
-#define  mgclear(vname)		undefine(vlookup(vname))
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _RAD_MGVARS_H_ */
+