4.3BSD/usr/src/usr.lib/libcurses/insertln.c

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/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#ifndef lint
static char sccsid[] = "@(#)insertln.c	5.1 (Berkeley) 6/7/85";
#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);
}