NetBSD/lib/libcurses/curses_addch.3

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.\" $NetBSD: curses_addch.3,v 1.3 2003/02/14 16:29:11 grant Exp $
.\"
.\" Copyright (c) 2002
.\" Brett Lymn (blymn@NetBSD.org, brett_lymn@yahoo.com.au)
.\"
.\" This code is donated to the NetBSD Foundation by the Author.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
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.\" notice, this list of conditions and the following disclaimer.
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.\" documentation and/or other materials provided with the distribution.
.\" 3. The name of the Author may not be used to endorse or promote
.\" products derived from this software without specific prior written
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
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.Dd August 12, 2002
.Dt CURSES_ADDCH 3
.Os
.Sh NAME
.Nm curses_addch ,
.Nm addch ,
.Nm waddch ,
.Nm mvaddch ,
.Nm mvwaddch
.Nd curses add characters to windows routines
.Sh LIBRARY
.Lb libcurses
.Sh SYNOPSIS
.Fd #include \*[Lt]curses.h\*[Gt]
.Ft int
.Fn addch "chtype ch"
.Ft int
.Fn waddch "WINDOW *win" "chtype ch"
.Ft int
.Fn mvaddch "int y" "int x" "chtype ch"
.Ft int
.Fn mvwaddch "WINDOW *win" "int y" "int x" "chtype ch"
.Sh DESCRIPTION
These functions add characters to
.Dv stdscr
or to the specified window.
.Pp
The
.Fn addch
function adds the character given in
.Fa ch
to
.Dv stdscr
at the current cursor position and advances the current cursor position by one.
Any character attributes set in
.Fa ch
will be merged with the background attributes currently set on
.Dv stdscr .
.Pp
The
.Fn waddch
function is the same as the
.Fn addch
function, excepting that the character is added to the window specified by
.Fa win .
.Pp
The
.Fn mvaddch
and
.Fn mvwaddch
functions are the same as the
.Fn addch
and
.Fn waddch
functions, respectively, excepting that
.Fn wmove
is called to move the cursor to the position specified by
.Fa y ,
.Fa x
before the character is added to the window.
.Sh RETURN VALUES
Functions returning pointers will return
.Dv NULL
if an error is detected.
The functions that return an int will return one of the following
values:
.Pp
.Bl -tag -width ERR -compact
.It Er OK
The function completed successfully.
.It Er ERR
An error occurred in the function.
.El
.Sh SEE ALSO
.Xr curses_addstr 3 ,
.Xr curses_attributes 3 ,
.Xr curses_cursor 3 ,
.Xr curses_delch 3 ,
.Xr curses_inch 3 ,
.Xr curses_insertch 3
.Sh STANDARDS
The
.Nx
Curses library complies with the X/Open Curses specification, part of the
Single Unix Specification.
.Sh HISTORY
The Curses package appeared in
.Bx 4.0 .