xref: /illumos-gate/usr/src/ucblib/libcurses/scroll.c (revision 8c0b080c8ed055a259d8cd26b9f005211c6a9753)
1 /*
2  * Copyright 2001 Sun Microsystems, Inc.  All rights reserved.
3  * Use is subject to license terms.
4  */
5 
6 /*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
7 /*	  All Rights Reserved  	*/
8 
9 /*
10  * Copyright (c) 1980 Regents of the University of California.
11  * All rights reserved.  The Berkeley software License Agreement
12  * specifies the terms and conditions for redistribution.
13  */
14 
15 /*LINTLIBRARY*/
16 
17 #ifndef lint
18 static char
19 sccsid[] = "@(#)scroll.c 1.6 88/02/08 SMI"; /* from UCB 5.1 85/06/07 */
20 #endif /* not lint */
21 
22 #include	"curses.ext"
23 
24 /*
25  *	This routine scrolls the window up a line.
26  */
27 
28 int
scroll(WINDOW * win)29 scroll(WINDOW *win)
30 {
31 	int	oy, ox;
32 
33 #ifdef DEBUG
34 	fprintf(outf, "SCROLL(%0.2o)\n", win);
35 #endif
36 
37 	if (!win->_scroll)
38 		return (ERR);
39 
40 	getyx(win, oy, ox);
41 	(void) wmove(win, 0, 0);
42 	(void) wdeleteln(win);
43 	(void) wmove(win, oy, ox);
44 
45 	if (win == curscr) {
46 		(void) _putchar('\n');
47 		if (!NONL)
48 			win->_curx = 0;
49 #ifdef DEBUG
50 		fprintf(outf, "SCROLL: win == curscr\n");
51 #endif
52 	}
53 
54 	return (OK);
55 }
56