1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 1997 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1988 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * University Copyright- Copyright (c) 1982, 1986, 1988
32 * The Regents of the University of California
33 * All Rights Reserved
34 *
35 * University Acknowledgment- Portions of this document are derived from
36 * software developed by the University of California, Berkeley, and its
37 * contributors.
38 */
39
40 /*LINTLIBRARY*/
41
42 /*
43 * This routine indicates to curses that a screen line is garbaged and
44 * should be thrown away before having anything written over the top of it.
45 * It could be used for programs such as editors which want a command to
46 * redraw just a single line. Such a command could be used in cases where
47 * there is a noisy line and redrawing the entire screen would be subject
48 * to even more noise. Just redrawing the single line gives some semblance
49 * of hope that it would show up unblemished.
50 *
51 * This is a more refined version of clearok
52 */
53
54 #include <sys/types.h>
55 #include "curses_inc.h"
56
57 int
wredrawln(WINDOW * win,int begline,int numlines)58 wredrawln(WINDOW *win, int begline, int numlines)
59 {
60 short *firstch, *efirstch;
61
62 if (numlines <= 0)
63 return (ERR);
64 if (begline < 0)
65 begline = 0;
66 if (begline + numlines > win->_maxy)
67 numlines = win->_maxy - begline;
68
69 firstch = win->_firstch + begline;
70 efirstch = firstch + numlines;
71 while (firstch < efirstch)
72 *firstch++ = _REDRAW;
73
74 return (win->_immed ? wrefresh(win) : OK);
75 }
76