\" $NetBSD: curses_insdelln.3,v 1.4 2025/04/11 23:57:20 uwe Exp $

\" $NetBSD: curses_insdelln.3,v 1.4 2025/04/11 23:57:20 uwe Exp $
\"
\" Copyright (c) 2002
\" Brett Lymn ([email protected], [email protected])
\"
\" 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
\" are met:
\" 1. Redistributions of source code must retain the above copyright
\" notice, this list of conditions and the following disclaimer.
\" 2. Redistributions in binary form must reproduce the above copyright
\" notice, this list of conditions and the following disclaimer in the
\" 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
\" permission.
\"
\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
\" SUCH DAMAGE.
\"
\"
Dd August 12, 2002
Dt CURSES_INSDEL 3
Os
Sh NAME
Nm curses_insdelln ,
Nm insdelln ,
Nm winsdelln
Nd curses insert or delete lines routines
Sh LIBRARY
Lb libcurses
Sh SYNOPSIS
In curses.h
Ft int
Fn insdelln "int n"
Ft int
Fn winsdelln "WINDOW *win" "int n"
Sh DESCRIPTION
These functions insert or delete lines on
Va stdscr
or on the specified window.
Pp
If
Fn insdelln
is called with a positive number in
Fa n ,
then the specified number of lines are inserted before the current line on
Va stdscr .
The last
Fa n
lines of the screen are no longer displayed.
If
Fa n
is negative, then
Fa n
lines are deleted from
Va stdscr ,
starting at the current line.
The last
Fa n
lines of
Va stdscr
are cleared.
Pp
The
Fn winsdelln
function is the same as the
Fn insdelln
function, excepting that lines are inserted or deleted from the window
specified by
Fa win .
Pp
If a scrolling region has been set with the
Fn setscrreg
or
Fn wsetscrreg
functions and the current cursor position is inside the scrolling region,
then only the lines from the current line to the bottom of the scrolling
region are affected.
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_deleteln 3 ,
Xr curses_insertln 3 ,
Xr curses_scroll 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 .