xref: /illumos-gate/usr/src/lib/libc/port/gen/xgetwidth.c (revision 69a119caa6570c7077699161b7c28b6ee9f8b0f4)
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 (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1986 AT&T	*/
28 /*	  All Rights Reserved  	*/
29 
30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
31 
32 /*
33  * _Xgetwidth calls _getwidth to get the values of environment variables
34  * CSWIDTH, SCRWIDTH and PCWIDTH, and checks the values to fit C process
35  * environment. This function is called only once in a program.
36  */
37 
38 /* #include "shlib.h" */
39 #include "lint.h"
40 #include <sys/types.h>
41 #include <euc.h>
42 #include <getwidth.h>
43 extern int _cswidth[];
44 
45 void
46 _xgetwidth(void)
47 {
48 	eucwidth_t	_eucwidth;
49 
50 	*_cswidth = 1; /* set to 1 when called */
51 	getwidth(&_eucwidth);
52 
53 	if (_eucwidth._eucw1 <= 4)
54 		_cswidth[1] = _eucwidth._eucw1;
55 	if (_eucwidth._eucw2 <= 4)
56 		_cswidth[2] = _eucwidth._eucw2;
57 	if (_eucwidth._eucw3 <= 4)
58 		_cswidth[3] = _eucwidth._eucw3;
59 }
60