+ <STRONG>halfdelay</STRONG>
+ returns an error if its parameter is outside the range 1..255.
+
+
+</PRE><H2><a name="h2-EXTENSIONS">EXTENSIONS</a></H2><PRE>
+ This implementation provides four functions which may be used to detect
+ if the corresponding flags were set or reset:
+
+ <STRONG>Query</STRONG> <STRONG>Set</STRONG> <STRONG>Reset</STRONG>
+ ------------------------------
+ is_cbreak cbreak nocbreak
+ is_echo echo noecho
+ is_nl nl nonl
+ is_raw raw noraw
+
+ In each case, the function returns
+
+ 1 if the flag is set,
+
+ 0 if the flag is reset, or
+
+ -1 if the curses library was not initialized.
+
+ These routines are specific to ncurses. They were not supported on
+ Version 7, BSD or System V implementations. It is recommended that any
+ code depending on ncurses extensions be conditioned using NCURSES_VER-
+ SION.