usr/src/lib/libcurses/screen/wctomb.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, 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 <widec.h>
  37 #include <ctype.h>
  38 #include "curses_wchar.h"
  39
  40 int
  41 _curs_wctomb(char *s, wchar_t wchar)
  42 {
  43         char *olds = s;
  44         int size, index;
  45         unsigned char d;
  46         if (!s)
  47                 return (0);
  48         if (wchar <= 0177 || (wchar <= 0377 && (iscntrl((int)wchar) != 0)))  {
  49                 /* LINTED */
  50                 *s++ = (char)wchar;
  51                 return (1);
  52         }
  53         switch (wchar & EUCMASK) {
  54
  55                 case P11:
  56                         size = eucw1;
  57                         break;
  58
  59                 case P01:
  60                         /* LINTED */
  61                         *s++ = (char)SS2;
  62                         size = eucw2;
  63                         break;
  64
  65                 case P10:
  66                         /* LINTED */
  67                         *s++ = (char)SS3;
  68                         size = eucw3;
  69                         break;
  70
  71                 default:
  72                         return (-1);
  73         }
  74         if ((index = size) <= 0)
  75                 return (-1);
  76         while (index--) {
  77                 /* LINTED */
  78                 d = wchar | 0200;
  79                 wchar >>= 7;
  80                 if (iscntrl(d))
  81                         return (-1);
  82                 s[index] = d;
  83         }
  84         /* LINTED */
  85         return ((int)(s - olds) + size);
  86 }