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- * @Id: curs_add_wchstr.3x,v 1.39 2024/04/20 21:20:07 tom Exp @
+ * @Id: curs_add_wchstr.3x,v 1.40 2024/05/11 20:39:53 tom Exp @
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-<TITLE>curs_add_wchstr 3x 2024-04-20 ncurses 6.5 Library calls</TITLE>
+<TITLE>curs_add_wchstr 3x 2024-05-11 ncurses 6.5 Library calls</TITLE>
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-<H1 class="no-header">curs_add_wchstr 3x 2024-04-20 ncurses 6.5 Library calls</H1>
+<H1 class="no-header">curs_add_wchstr 3x 2024-05-11 ncurses 6.5 Library calls</H1>
<PRE>
<STRONG><A HREF="curs_add_wchstr.3x.html">curs_add_wchstr(3x)</A></STRONG> Library calls <STRONG><A HREF="curs_add_wchstr.3x.html">curs_add_wchstr(3x)</A></STRONG>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
- These functions copy the (null-terminated) array of complex characters
- <EM>wchstr</EM> into the window image structure starting at the current cursor
- position.
+ <STRONG>wadd_wchstr</STRONG> copies the string of complex characters <EM>wchstr</EM> to the
+ window <EM>win</EM>. A null complex character terminates the string. If a
+ complex character does completely fit at the end of the line, <EM>curses</EM>
+ fills the remaining columns with the window background; see <STRONG><A HREF="curs_bkgrnd.3x.html">bkgrnd(3x)</A></STRONG>.
+ <STRONG>wadd_wchnstr</STRONG> does the same, but copies at most <EM>n</EM> characters, or as many
+ as possible if <EM>n</EM> is <STRONG>-1</STRONG>. <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG> describes the variants of these
+ functions.
- The four functions with <EM>n</EM> as the last argument copy at most <EM>n</EM> elements,
- but no more than will fit on the line. If <STRONG>n</STRONG>=<STRONG>-1</STRONG> then the whole array is
- copied, to the maximum number of characters that will fit on the line.
+ Because these functions do not call <STRONG><A HREF="curs_add_wch.3x.html">wadd_wch(3x)</A></STRONG> internally, they are
+ faster than <STRONG><A HREF="curs_addwstr.3x.html">waddwstr(3x)</A></STRONG> and <STRONG><A HREF="curs_addwstr.3x.html">waddnwstr(3x)</A></STRONG>. On the other hand, they
- The window cursor is <EM>not</EM> advanced. These functions are faster than
- <STRONG>waddnstr</STRONG>. On the other hand:
+ <STRONG>o</STRONG> do not treat the backspace, carriage return, or line feed
+ characters specially;
- <STRONG>o</STRONG> they do not perform checking (such as for the newline, backspace,
- or carriage return characters),
+ <STRONG>o</STRONG> do not represent unprintable characters with <STRONG><A HREF="curs_util.3x.html">wunctrl(3x)</A></STRONG>;
- <STRONG>o</STRONG> they do not advance the current cursor position,
+ <STRONG>o</STRONG> do not update the cursor position to follow the last character
+ written;
- <STRONG>o</STRONG> they do not expand other control characters to ^-escapes, and
-
- <STRONG>o</STRONG> they truncate the string if it crosses the right margin, rather
- than wrapping it around to the new line.
-
- These functions end successfully on encountering a null <STRONG>cchar_t</STRONG>, or
- when they have filled the current line. If a complex character cannot
- completely fit at the end of the current line, the remaining columns
- are filled with the background character and rendition.
+ <STRONG>o</STRONG> truncate the string at the window's right margin, rather than
+ wrapping it to the next line and potentially scrolling.
</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
- All functions return the integer <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG> on success.
+ These functions return <STRONG>OK</STRONG> on success and <STRONG>ERR</STRONG> on failure.
- X/Open Curses does not specify any error conditions. This
- implementation returns an error
+ X/Open Curses does not specify any error conditions. <EM>ncurses</EM> returns
+ <STRONG>ERR</STRONG> if
- <STRONG>o</STRONG> if the <EM>win</EM> parameter is null or
+ <STRONG>o</STRONG> <EM>win</EM> is <STRONG>NULL</STRONG> or
- <STRONG>o</STRONG> if the <EM>wchstr</EM> parameter is null.
+ <STRONG>o</STRONG> <EM>wchstr</EM> is <STRONG>NULL</STRONG>.
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>
- All functions except <STRONG>wadd_wchnstr</STRONG> may be macros.
+ All of these functions except <STRONG>wadd_wchnstr</STRONG> may be implemented as
+ macros.
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
- These functions are described in X/Open Curses, Issue 4.
+ X/Open Curses, Issue 4 describes these functions.
</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
-ncurses 6.5 2024-0
4-20 <STRONG><A HREF="curs_add_wchstr.3x.html">curs_add_wchstr(3x)</A></STRONG>
+ncurses 6.5 2024-0
5-11 <STRONG><A HREF="curs_add_wchstr.3x.html">curs_add_wchstr(3x)</A></STRONG>
</PRE>
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