+
+#if NCURSES_EXT_FUNCS
+
+/*
+ * SCREEN is always opaque, but nl/raw/cbreak/echo set properties in it.
+ * As an extension, provide a way to query the properties.
+ *
+ * There are other properties which could be queried, e.g., filter, keypad,
+ * use_env, use_meta, but these particular properties are saved/restored within
+ * the wgetnstr() and wgetn_wstr() functions, which requires that the higher
+ * level curses library knows about the internal state of the lower level
+ * terminfo library.
+ */
+
+#define is_TEST(show,what) \
+ NCURSES_EXPORT(int) \
+ NCURSES_SP_NAME(show) (NCURSES_SP_DCL0) \
+ { \
+ return ((SP_PARM != NULL) ? (what(SP_PARM) ? 1 : 0) : -1); \
+ }
+
+is_TEST(is_nl, IsNl);
+is_TEST(is_raw, IsRaw);
+is_TEST(is_cbreak, IsCbreak);
+is_TEST(is_echo, IsEcho);
+
+#if NCURSES_SP_FUNCS
+#undef is_TEST
+#define is_TEST(show) \
+ NCURSES_EXPORT(int) \
+ show(void) \
+ { \
+ return NCURSES_SP_NAME(show) (CURRENT_SCREEN); \
+ }
+is_TEST(is_nl);
+is_TEST(is_raw);
+is_TEST(is_cbreak);
+is_TEST(is_echo);
+#endif
+
+#endif /* extensions */