xref: /netbsd-src/lib/libcurses/insertln.c (revision cda4f8f6ee55684e8d311b86c99ea59191e6b74f)
1 /*
2  * Copyright (c) 1981 Regents of the University of California.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *	This product includes software developed by the University of
16  *	California, Berkeley and its contributors.
17  * 4. Neither the name of the University nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  */
33 
34 #ifndef lint
35 static char sccsid[] = "@(#)insertln.c	5.4 (Berkeley) 6/1/90";
36 #endif /* not lint */
37 
38 # include	"curses.ext"
39 
40 /*
41  *	This routine performs an insert-line on the window, leaving
42  * (_cury,_curx) unchanged.
43  *
44  */
45 winsertln(win)
46 reg WINDOW	*win; {
47 
48 	reg chtype      *temp;
49 	reg int		y;
50 	reg chtype      *end;
51 	reg int		x;
52 
53 #ifdef	DEBUG
54 	fprintf(outf, "INSERTLN(%0.2o)\n", win);
55 #endif
56 	if (win->_orig == NULL)
57 		temp = win->_y[win->_maxy - 1];
58 	for (y = win->_maxy - 1; y > win->_cury; --y) {
59 		if (win->_orig == NULL)
60 			win->_y[y] = win->_y[y - 1];
61 		else
62 			bcopy(win->_y[y - 1], win->_y[y], win->_maxx * sizeof(chtype));
63 		touchline(win, y, 0, win->_maxx - 1);
64 	}
65 	if (win->_orig == NULL)
66 		win->_y[y] = temp;
67 	else
68 		temp = win->_y[y];
69 	for (end = &temp[win->_maxx]; temp < end; )
70 		*temp++ = ' ';
71 	touchline(win, y, 0, win->_maxx - 1);
72 	if (win->_orig == NULL)
73 		_id_subwins(win);
74 }
75