--- a/direction.h Mon May 01 09:25:23 2006 +0000
+++ b/direction.h Mon May 01 09:34:23 2006 +0000
@@ -93,7 +93,8 @@
/* the 2 axis */
typedef enum Axis {
AXIS_X = 0,
- AXIS_Y = 1
+ AXIS_Y = 1,
+ AXIS_END
} Axis;
@@ -112,4 +113,19 @@
return (DiagDirection)(2 - a);
}
+static inline bool IsValidDiagDirection(DiagDirection d)
+{
+ return d < DIAGDIR_END;
+}
+
+static inline bool IsValidDirection(DiagDirection d)
+{
+ return d < DIR_END;
+}
+
+static inline bool IsValidAxis(DiagDirection d)
+{
+ return d < AXIS_END;
+}
+
#endif