blob: 162532cecea1f96ddeb6c55b18748bb7b3579f60 [file] [log] [blame] [edit]
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<!--
* t
****************************************************************************
* Copyright (c) 1998-2006,2007 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************
* @Id: curs_addch.3x,v 1.27 2007/06/02 20:40:07 tom Exp @
-->
<HTML>
<HEAD>
<TITLE>curs_addch 3x</TITLE>
<link rev=made href="mailto:bug-ncurses@gnu.org">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</HEAD>
<BODY>
<H1>curs_addch 3x</H1>
<HR>
<PRE>
<!-- Manpage converted by man2html 3.0.1 -->
<STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG> <STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG>
</PRE>
<H2>NAME</H2><PRE>
<STRONG>addch</STRONG>, <STRONG>waddch</STRONG>, <STRONG>mvaddch</STRONG>, <STRONG>mvwaddch</STRONG>, <STRONG>echochar</STRONG>, <STRONG>wechochar</STRONG> -
add a character (with attributes) to a <STRONG>curses</STRONG> window, then
advance the cursor
</PRE>
<H2>SYNOPSIS</H2><PRE>
<STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
<STRONG>int</STRONG> <STRONG>addch(const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG>
<STRONG>int</STRONG> <STRONG>waddch(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG>
<STRONG>int</STRONG> <STRONG>mvaddch(int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG>
<STRONG>int</STRONG> <STRONG>mvwaddch(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG>
<STRONG>int</STRONG> <STRONG>echochar(const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG>
<STRONG>int</STRONG> <STRONG>wechochar(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG>
</PRE>
<H2>DESCRIPTION</H2><PRE>
The <STRONG>addch</STRONG>, <STRONG>waddch</STRONG>, <STRONG>mvaddch</STRONG> and <STRONG>mvwaddch</STRONG> routines put the
character <EM>ch</EM> into the given window at its current window
position, which is then advanced. They are analogous to
<STRONG>putchar</STRONG> in <STRONG><A HREF="stdio.3.html">stdio(3)</A></STRONG>. If the advance is at the right mar-
gin, the cursor automatically wraps to the beginning of
the next line. At the bottom of the current scrolling
region, if <STRONG>scrollok</STRONG> is enabled, the scrolling region is
scrolled up one line.
If <EM>ch</EM> is a tab, newline, or backspace, the cursor is moved
appropriately within the window. Backspace moves the cur-
sor one character left; at the left edge of a window it
does nothing. Newline does a <STRONG>clrtoeol</STRONG>, then moves the
cursor to the window left margin on the next line,
scrolling the window if on the last line. Tabs are con-
sidered to be at every eighth column. The tab interval
may be altered by setting the <STRONG>TABSIZE</STRONG> variable.
If <EM>ch</EM> is any control character other than tab, newline, or
backspace, it is drawn in <STRONG>^</STRONG><EM>X</EM> notation. Calling <STRONG>winch</STRONG>
after adding a control character does not return the char-
acter itself, but instead returns the ^-representation of
the control character.
Video attributes can be combined with a character argument
passed to <STRONG>addch</STRONG> or related functions by logical-ORing them
into the character. (Thus, text, including attributes,
can be copied from one place to another using <STRONG>inch</STRONG> and
<STRONG>addch</STRONG>.) See the <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG> page for values of prede-
fined video attribute constants that can be usefully OR'ed
into characters.
The <STRONG>echochar</STRONG> and <STRONG>wechochar</STRONG> routines are equivalent to a
call to <STRONG>addch</STRONG> followed by a call to <STRONG>refresh</STRONG>, or a call to
<STRONG>waddch</STRONG> followed by a call to <STRONG>wrefresh</STRONG>. The knowledge that
only a single character is being output is used and, for
non-control characters, a considerable performance gain
may be seen by using these routines instead of their
equivalents.
<STRONG>Line</STRONG> <STRONG>Graphics</STRONG>
The following variables may be used to add line drawing
characters to the screen with routines of the <STRONG>addch</STRONG> fam-
ily. The default character listed below is used if the
<STRONG>acsc</STRONG> capability does not define a terminal-specific
replacement for it. The names are taken from VT100
nomenclature.
<EM>Name</EM> <EM>Default</EM> <EM>Description</EM>
--------------------------------------------------
ACS_BLOCK # solid square block
ACS_BOARD # board of squares
ACS_BTEE + bottom tee
ACS_BULLET o bullet
ACS_CKBOARD : checker board (stipple)
ACS_DARROW v arrow pointing down
ACS_DEGREE ' degree symbol
ACS_DIAMOND + diamond
ACS_GEQUAL &gt; greater-than-or-equal-to
ACS_HLINE - horizontal line
ACS_LANTERN # lantern symbol
ACS_LARROW &lt; arrow pointing left
ACS_LEQUAL &lt; less-than-or-equal-to
ACS_LLCORNER + lower left-hand corner
ACS_LRCORNER + lower right-hand corner
ACS_LTEE + left tee
ACS_NEQUAL ! not-equal
ACS_PI * greek pi
ACS_PLMINUS # plus/minus
ACS_PLUS + plus
ACS_RARROW &gt; arrow pointing right
ACS_RTEE + right tee
ACS_S1 - scan line 1
ACS_S3 - scan line 3
ACS_S7 - scan line 7
ACS_S9 _ scan line 9
ACS_STERLING f pound-sterling symbol
ACS_TTEE + top tee
ACS_UARROW ^ arrow pointing up
ACS_ULCORNER + upper left-hand corner
ACS_URCORNER + upper right-hand corner
ACS_VLINE | vertical line
</PRE>
<H2>RETURN VALUE</H2><PRE>
All routines return the integer <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG> on
success (the SVr4 manuals specify only "an integer value
other than <STRONG>ERR</STRONG>") upon successful completion, unless other-
wise noted in the preceding routine descriptions.
</PRE>
<H2>NOTES</H2><PRE>
Note that <STRONG>addch</STRONG>, <STRONG>mvaddch</STRONG>, <STRONG>mvwaddch</STRONG>, and <STRONG>echochar</STRONG> may be
macros.
</PRE>
<H2>PORTABILITY</H2><PRE>
All these functions are described in the XSI Curses stan-
dard, Issue 4. The defaults specified for forms-drawing
characters apply in the POSIX locale.
Some ACS symbols (ACS_S3, ACS_S7, ACS_LEQUAL, ACS_GEQUAL,
ACS_PI, ACS_NEQUAL, ACS_STERLING) were not documented in
any publicly released System V. However, many publicly
available terminfos include <STRONG>acsc</STRONG> strings in which their
key characters (pryz{|}) are embedded, and a second-hand
list of their character descriptions has come to light.
The ACS-prefixed names for them were invented for
<STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG>.
The <STRONG>TABSIZE</STRONG> variable is implemented in some versions of
curses, but is not part of X/Open curses.
If <EM>ch</EM> is a carriage return, the cursor is moved to the
beginning of the current row of the window. This is true
of other implementations, but is not documented.
</PRE>
<H2>SEE ALSO</H2><PRE>
<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG>, <STRONG><A HREF="curs_clear.3x.html">curs_clear(3x)</A></STRONG>, <STRONG><A HREF="curs_inch.3x.html">curs_inch(3x)</A></STRONG>,
<STRONG><A HREF="curs_outopts.3x.html">curs_outopts(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>, <STRONG><A HREF="putc.3.html">putc(3)</A></STRONG>.
Comparable functions in the wide-character (ncursesw)
library are described in <STRONG><A HREF="curs_add_wch.3x.html">curs_add_wch(3x)</A></STRONG>.
<STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG>
</PRE>
<HR>
<ADDRESS>
Man(1) output converted with
<a href="http://www.oac.uci.edu/indiv/ehood/man2html.html">man2html</a>
</ADDRESS>
</BODY>
</HTML>