+
+#if NCURSES_SP_FUNCS
+static void ClearScreen(SCREEN *, NCURSES_CH_T blank);
+static int ClrBottom(SCREEN *, int total);
+static void ClrUpdate(SCREEN *);
+static void TransformLine(SCREEN *, int const lineno);
+#else
+static void ClearScreen(NCURSES_CH_T blank);
+static int ClrBottom(int total);
+static void ClrUpdate(void);