usr/src/lib/libc/port/gen/xgetwidth.c

   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 }