xref: /titanic_50/usr/src/lib/libcurses/screen/tgetwch.c (revision c5c4113dfcabb1eed3d4bdf7609de5170027a794)
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 /*  Copyright (c) 1988 AT&T */
23 /*    All Rights Reserved   */
24 
25 
26 /*
27  *      Copyright (c) 1997, by Sun Microsystems, Inc.
28  *      All rights reserved.
29  */
30 
31 #pragma ident	"%Z%%M%	%I%	%E% SMI"
32 
33 /*LINTLIBRARY*/
34 
35 #include	<sys/types.h>
36 #include	"curses_inc.h"
37 
38 /*
39  *	Read a process code from the terminal
40  *	cntl:	= 0 for single-char key only
41  *		= 1 for matching function key and macro patterns.
42  *		= 2 same as 1 but no time-out for funckey matching.
43  */
44 
45 wchar_t
46 tgetwch(int cntl)
47 {
48 	int	c, n, type, width;
49 	char	buf[CSMAX];
50 	wchar_t	wchar;
51 
52 	/* get the first byte */
53 	/* LINTED */
54 	if ((c = (int)tgetch(cntl)) == ERR)
55 		return (ERR);
56 
57 	type = TYPE(c);
58 	width = cswidth[type] - ((type == 1 || type == 2) ? 0 : 1);
59 	/* LINTED */
60 	buf[0] = (char)c;
61 	for (n = 1; n < width; ++n) {
62 		/* LINTED */
63 		if ((c = (int)tgetch(cntl)) == ERR)
64 			return (ERR);
65 		if (TYPE(c) != 0)
66 			return (ERR);
67 		/* LINTED */
68 		buf[n] = (char)c;
69 		}
70 
71 	/* translate it to process code */
72 	(void) _curs_mbtowc(&wchar, buf, n);
73 	return (wchar);
74 }
75