xref: /original-bsd/lib/libcurses/insertln.c (revision 860e07fc)
1 /*
2  * Copyright (c) 1981 Regents of the University of California.
3  * All rights reserved.
4  *
5  * %sccs.include.redist.c%
6  */
7 
8 #ifndef lint
9 static char sccsid[] = "@(#)insertln.c	5.6 (Berkeley) 08/23/92";
10 #endif	/* not lint */
11 
12 #include <curses.h>
13 #include <string.h>
14 
15 /*
16  * winsertln --
17  *	Do an insert-line on the window, leaving (_cury,_curx) unchanged.
18  */
19 int
20 winsertln(win)
21 	register WINDOW *win;
22 {
23 
24 	register int y;
25 	register char *end, *temp;
26 
27 #ifdef DEBUG
28 	__TRACE("insertln: (%0.2o)\n", win);
29 #endif
30 	if (win->_orig == NULL)
31 		temp = win->_y[win->_maxy - 1];
32 	for (y = win->_maxy - 1; y > win->_cury; --y) {
33 		if (win->_orig == NULL)
34 			win->_y[y] = win->_y[y - 1];
35 		else
36 			bcopy(win->_y[y - 1], win->_y[y], win->_maxx);
37 		touchline(win, y, 0, win->_maxx - 1);
38 	}
39 	if (win->_orig == NULL)
40 		win->_y[y] = temp;
41 	else
42 		temp = win->_y[y];
43 	for (end = &temp[win->_maxx]; temp < end;)
44 		*temp++ = ' ';
45 	touchline(win, y, 0, win->_maxx - 1);
46 	if (win->_orig == NULL)
47 		__id_subwins(win);
48 	return (OK);
49 }
50