Added ifndef/def/endif protection to C headers.

[stripchart.git] / stripchart.h

diff --git a/stripchart.h b/stripchart.h
index b738e09c2e1ebc539ca241a0786059878f7e33f8..d564c19229cc326aeb46bd0be0de77fe8666ec60 100644 (file)
--- a/stripchart.h
+++ b/stripchart.h
@@ -22,6 +22,9 @@
   Philadelphia PA 19104, USA.
  */
 
+#ifndef _STRIPCHART_H
+#define _STRIPCHART_H
+
 typedef struct stripchart_struct stripchart_t;
 
 extern int stripchart_create(stripchart_t **pChart,
@@ -35,3 +38,5 @@ extern int stripchart_create(stripchart_t **pChart,
 extern int stripchart_point(stripchart_t *chart, double value);
 
 extern int stripchart_destroy(stripchart_t **pChart);
+
+#endif /* _STRIPCHART_H */