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 (c) 1995-1998, 2000 by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29/* LINTLIBRARY */
30
31/*
32 * wtimeout.c
33 *
34 * XCurses Library
35 *
36 * Copyright 1990, 1994 by Mortice Kern Systems Inc.  All rights reserved.
37 *
38 */
39
40#ifdef M_RCSID
41#ifndef lint
42static char rcsID[] = "$Header: /rd/src/libc/xcurses/rcs/wtimeout.c 1.1 "
43"1995/06/19 16:12:14 ant Exp $";
44#endif
45#endif
46
47#include <private.h>
48
49/*
50 * Set blocking or non-blocking read for a specified window.
51 * The delay is in milliseconds.
52 */
53void
54wtimeout(WINDOW *w, int delay)
55{
56	if (delay < 0) {
57		/* Blocking mode */
58		w->_vmin = 1;
59		w->_vtime = 0;
60	} else {
61		/* Non-Block (0 == delay) and delayed (0 < delay) */
62		w->_vmin = 0;
63
64		/*
65		 * VTIME is in 1/10 of second
66		 * w->_vtime value will be set to termios.c_cc[VMIN].
67		 * Since c_cc[VMIN] is an unsigned char type, the value
68		 * to be set needs to be smaller than or equal to 255.
69		 * Also 'delay' is in milliseconds, so it is rounted up
70		 * to the nearest 10th of a second.  Only when 'delay' is
71		 * equal to 0, w->_vtime should become 0; otherwise,
72		 * it should become a positive value.  The previous version
73		 * of this code was using the expression "(delay + 50) /100",
74		 * which was incorrect.
75		 */
76		w->_vtime = (delay > 25500) ? 255 : (delay + 99) / 100;
77	}
78}
79