xref: /illumos-gate/usr/src/lib/libc/port/gen/xgetwidth.c (revision 7a6d80f1660abd4755c68cbd094d4a914681d26e)
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 /*
31  * _Xgetwidth calls _getwidth to get the values of environment variables
32  * CSWIDTH, SCRWIDTH and PCWIDTH, and checks the values to fit C process
33  * environment. This function is called only once in a program.
34  */
35 
36 /* #include "shlib.h" */
37 #include "lint.h"
38 #include <sys/types.h>
39 #include <euc.h>
40 #include <getwidth.h>
41 extern int _cswidth[];
42 
43 void
44 _xgetwidth(void)
45 {
46 	eucwidth_t	_eucwidth;
47 
48 	*_cswidth = 1; /* set to 1 when called */
49 	getwidth(&_eucwidth);
50 
51 	if (_eucwidth._eucw1 <= 4)
52 		_cswidth[1] = _eucwidth._eucw1;
53 	if (_eucwidth._eucw2 <= 4)
54 		_cswidth[2] = _eucwidth._eucw2;
55 	if (_eucwidth._eucw3 <= 4)
56 		_cswidth[3] = _eucwidth._eucw3;
57 }
58