NetBSD/lib/libcurses/curses_add.3

.\"	$NetBSD: curses_add.3,v 1.2 2002/10/21 13:59:52 wiz 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.
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.Dd August 12, 2002
.Dt CURSES 3
.Os
.Sh NAME
.Nm addch ,
.Nm addstr ,
.Nm addnstr ,
.Nm waddch ,
.Nm waddstr
.Nd add characters
.Sh LIBRARY
.Lb libcurses
.Sh SYNOPSIS
.Fd #include \*[Lt]curses.h\*[Gt]
.Ft int
.Fn addch "chtype c"
.Ft int
.Fn waddch "WINDOW *win" "chtype c"
.Ft int
.Fn addstr "const char *string"
.Ft int
.Fn waddstr "WINDOW *win" "const char *string"
.Ft int
.Fn addnstr "const char *string" "int len"
.Sh DESCRIPTION
The
.Fn addch
function adds the character given in
.Fa c
to
.Dv stdscr
at the current cursor position and advances the current cursor
position by one.  Any character attributes currently set will be
applied to the added character.  The
.Fn waddch
function is the same as the
.Fn addch
function excepting that the character is added to the window specified.
.Pp
.Fn addstr
will add the string passed in
.Fa string
to
.Dv stdscr
starting at the current cursor location, any character attributes in
effect at the time will be applied to the added string,
.Fn waddstr
does the same thing but adds the string to the specified window.
Similarly,
.Fn addnstr
will add the contents of
.Fa string
to
.Dv stdscr
but will limit the number of characters added to be, at most,
.Fa len .
If
.Fa len
is -1 then
.Fa addnstr
will add the number of bytes contained in the null terminated string
.Fa string .
.Sh RETURN VALUES
Functions returning pointers will return 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 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 .