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- * @Id: curs_in_wch.3x,v 1.14 2022/02/12 20:07:29 tom Exp @
+ * @Id: curs_in_wch.3x,v 1.33 2024/05/18 20:19:38 tom Exp @
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+<TITLE>curs_in_wch 3x 2024-05-18 ncurses 6.5 Library calls</TITLE>
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-<H1 class="no-header">curs_in_wch 3x 2022-02-12 ncurses 6.4 Library calls</H1>
+<H1 class="no-header">curs_in_wch 3x 2024-05-18 ncurses 6.5 Library calls</H1>
<PRE>
<STRONG><A HREF="curs_in_wch.3x.html">curs_in_wch(3x)</A></STRONG> Library calls <STRONG><A HREF="curs_in_wch.3x.html">curs_in_wch(3x)</A></STRONG>
</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
- <STRONG>in_wch</STRONG>, <STRONG>mvin_wch</STRONG>, <STRONG>mvwin_wch</STRONG>, <STRONG>win_wch</STRONG> - extract a complex character and
- rendition from a window
+ <STRONG>in_wch</STRONG>, <STRONG>mvin_wch</STRONG>, <STRONG>mvwin_wch</STRONG>, <STRONG>win_wch</STRONG> - get a <EM>curses</EM> complex character
+ from a window
</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
- <STRONG>int</STRONG> <STRONG>in_wch(cchar_t</STRONG> <STRONG>*</STRONG><EM>wcval</EM><STRONG>);</STRONG>
- <STRONG>int</STRONG> <STRONG>win_wch(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>wcval</EM><STRONG>);</STRONG>
-
- <STRONG>int</STRONG> <STRONG>mvin_wch(int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>wcval</EM><STRONG>);</STRONG>
- <STRONG>int</STRONG> <STRONG>mvwin_wch(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>wcval</EM><STRONG>);</STRONG>
+ <STRONG>int</STRONG> <STRONG>in_wch(cchar_t</STRONG> <STRONG>*</STRONG> <EM>wch</EM><STRONG>);</STRONG>
+ <STRONG>int</STRONG> <STRONG>win_wch(WINDOW</STRONG> <STRONG>*</STRONG> <EM>win</EM><STRONG>,</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG> <EM>wch</EM><STRONG>);</STRONG>
+ <STRONG>int</STRONG> <STRONG>mvin_wch(int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG> <EM>wch</EM><STRONG>);</STRONG>
+ <STRONG>int</STRONG> <STRONG>mvwin_wch(WINDOW</STRONG> <STRONG>*</STRONG> <EM>win</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG> <EM>wch</EM><STRONG>);</STRONG>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
- These functions extract the complex character and rendition from the
- current position in the named window into the <STRONG>cchar_t</STRONG> object referenced
- by wcval.
+ <STRONG>win_wch</STRONG> copies the <EM>curses</EM> complex character at the cursor position in
+ <EM>win</EM> into <EM>wch</EM>. Use <STRONG><A HREF="curs_getcchar.3x.html">getcchar(3x)</A></STRONG> to extract its character code,
+ attributes, and color pair identifier. <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG> describes the
+ variants of this function.
</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
- No errors are defined in the XSI Curses standard. This implementation
- checks for null pointers, returns <STRONG>ERR</STRONG> in that case. Also, the <EM>mv</EM>
- routines check for error moving the cursor, returning <STRONG>ERR</STRONG> in that case.
- Otherwise they return <STRONG>OK</STRONG>.
+ These functions return <STRONG>OK</STRONG> on success and <STRONG>ERR</STRONG> on failure.
+
+ In <EM>ncurses</EM>, <STRONG>win_wch</STRONG> returns <STRONG>ERR</STRONG> if <EM>win</EM> is <STRONG>NULL</STRONG>.
- Functions with a "mv" prefix first perform a cursor movement using
- <STRONG>wmove</STRONG>, and return an error if the position is outside the window, or if
- the window pointer is null.
+ Functions prefixed with "mv" first perform cursor movement and fail if
+ the position (<EM>y</EM>, <EM>x</EM>) is outside the window boundaries.
</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
- Note that all of these routines may be macros.
+ <STRONG>in_wch</STRONG>, <STRONG>mvin_wch</STRONG>, and <STRONG>mvwin_wch</STRONG> may be implemented as macros.
+
+ Unlike <STRONG><A HREF="curs_inch.3x.html">winch(3x)</A></STRONG>, <STRONG>win_wch</STRONG> and its variants store the value of the
+ retrieved character in an additional <EM>wch</EM> parameter instead of the
+ return value.
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
- These functions are described in the XSI Curses standard, Issue 4.
+ X/Open Curses, Issue 4 describes these functions. It specifies no
+ error conditions for them.
</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="curs_inch.3x.html">curs_inch(3x)</A></STRONG>.
+ <STRONG><A HREF="curs_inch.3x.html">curs_inch(3x)</A></STRONG> describes comparable functions of the <EM>ncurses</EM> library in
+ its non-wide-character configuration.
+
+ <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_inwstr.3x.html">curs_inwstr(3x)</A></STRONG>
-ncurses 6.4 2022-02-12 <STRONG><A HREF="curs_in_wch.3x.html">curs_in_wch(3x)</A></STRONG>
+ncurses 6.5 2024-05-18 <STRONG><A HREF="curs_in_wch.3x.html">curs_in_wch(3x)</A></STRONG>
</PRE>
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