-/* ------------------------------------------------------------------------- */
-/* exported variables */
-/* ------------------------------------------------------------------------- */
+extern int REAL_SX, REAL_SY;
+
+#define FULL_SXSIZE (2 + SXSIZE + 2)
+#define FULL_SYSIZE (2 + SYSIZE + 2)
+
+
+// ----------------------------------------------------------------------------
+// data structure definitions
+// ----------------------------------------------------------------------------
+
+// ----------------------------------------------------------------------------
+// exported variables
+// ----------------------------------------------------------------------------