xref: /src/lib/libcurses/insertln.c

/*
 * Copyright (c) 1981 Regents of the University of California.
 * All rights reserved.
 *
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
 */

#ifndef lint
static char sccsid[] = "@(#)insertln.c	5.4 (Berkeley) 6/1/90";
#endif /* not lint */

# include	"curses.ext"

/*
 *	This routine performs an insert-line on the window, leaving
 * (_cury,_curx) unchanged.
 *
 */
winsertln(win)
reg WINDOW	*win; {

	reg char	*temp;
	reg int		y;
	reg char	*end;
	reg int		x;

#ifdef	DEBUG
	fprintf(outf, "INSERTLN(%0.2o)\n", win);
#endif
	if (win->_orig == NULL)
		temp = win->_y[win->_maxy - 1];
	for (y = win->_maxy - 1; y > win->_cury; --y) {
		if (win->_orig == NULL)
			win->_y[y] = win->_y[y - 1];
		else
			bcopy(win->_y[y - 1], win->_y[y], win->_maxx);
		touchline(win, y, 0, win->_maxx - 1);
	}
	if (win->_orig == NULL)
		win->_y[y] = temp;
	else
		temp = win->_y[y];
	for (end = &temp[win->_maxx]; temp < end; )
		*temp++ = ' ';
	touchline(win, y, 0, win->_maxx - 1);
	if (win->_orig == NULL)
		_id_subwins(win);
}