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<STRONG>wmove</STRONG>, and return an error if the position is outside the window, or if
the window pointer is null.
+ The <STRONG>winch</STRONG> function does not return an error if the window contains
+ characters larger than 8-bits (255). Only the low-order 8 bits of the
+ character are used by <STRONG>winch</STRONG>.
+
</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
Note that all of these routines may be macros.
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
These functions are described in the XSI Curses standard, Issue 4.
+ Very old systems (before standardization) provide a different function
+ with the same name:
+
+ <STRONG>o</STRONG> The <STRONG>winch</STRONG> function was part of the original BSD curses library,
+ which stored a 7-bit character combined with the <EM>standout</EM>
+ attribute.
+
+ In BSD curses, <STRONG>winch</STRONG> returned only the character (as an integer)
+ with the <EM>standout</EM> attribute removed.
+
+ <STRONG>o</STRONG> System V curses added support for several video attributes which
+ could be combined with characters in the window.
+
+ Reflecting this improvement, the function was altered to return the
+ character combined with all video attributes in a <STRONG>chtype</STRONG> value.
+
+ X/Open Curses does not specify the size and layout of attributes, color
+ and character values in <STRONG>chtype</STRONG>; it is implementation-dependent. This
+ implementation uses 8 bits for character values. An application using
+ more bits, e.g., a Unicode value, should use the wide-character equiva-
+ lents to these functions.
+
</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
- <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>.
+ <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>
+ gives an overview of the WINDOW and <STRONG>chtype</STRONG> data types.
+
+ <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG>
+ goes into more detail, pointing out portability problems and con-
+ straints on the use of <STRONG>chtype</STRONG> for returning window information.
- Comparable functions in the wide-character (ncursesw) library are
- described in <STRONG><A HREF="curs_in_wch.3x.html">curs_in_wch(3x)</A></STRONG>.
+ <STRONG><A HREF="curs_in_wch.3x.html">curs_in_wch(3x)</A></STRONG>
+ describes comparable functions for the wide-character (ncursesw)
+ library.