.\"	$NetBSD: curses_insertln.3,v 1.4 2006/02/05 17:07:13 jdc 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 February 5, 2006
.Dt CURSES_INSERTLN 3
.Os
.Sh NAME
.Nm curses_insertln ,
.Nm insertln ,
.Nm winsertln
.Nd curses insert single line routines
.Sh LIBRARY
.Lb libcurses
.Sh SYNOPSIS
.In curses.h
.Ft int
.Fn insertln "void"
.Ft int
.Fn winsertln "WINDOW *win"
.Sh DESCRIPTION
These functions insert a single line on
.Dv stdscr
or on the specified window.
.Pp
The
.Fn insertln
function inserts a blank line before the current line on
.Dv stdscr .
The current line and all lines below are moved down one line away from
the cursor and the bottom line of the window is lost.
.Pp
The
.Fn winsertln
function is the same as the
.Fn insertln
function, excepting that the line is inserted on the window
.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 moved down and the bottom line of the scrolling region lost.
.Pp
The functions
.Fn insertln
and
.Fn winsertln win
are equivalent to
.Fn insdelln 1
and
.Fn winsdelln win 1 ,
respectively.
.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_insdelln 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 .