usr/src/lib/libcurses/screen/wgetwch.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        "curses_inc.h"
  37
  38 /*
  39  *      Get a process code
  40  */
  41
  42 int
  43 wgetwch(WINDOW *win)
  44 {
  45         int     c, n, type, width;
  46         char    buf[CSMAX];
  47         wchar_t wchar;
  48
  49         /* get the first byte */
  50         if ((c = wgetch(win)) == ERR)
  51                 return (ERR);
  52
  53         if (c >= KEY_MIN)
  54                 return (c);
  55
  56         type = TYPE(c);
  57         width = cswidth[type] - ((type == 1 || type == 2) ? 0 : 1);
  58         /* LINTED */
  59         buf[0] = (char)c;
  60         for (n = 1; n <= width; ++n) {
  61                 if ((c = wgetch(win)) == ERR)
  62                         return (ERR);
  63                 if (TYPE(c) != 0)
  64                         return (ERR);
  65                 /* LINTED */
  66                 buf[n] = (char)c;
  67         }
  68
  69         /* translate it to process code */
  70         if ((_curs_mbtowc(&wchar, buf, n)) < 0)
  71                 return (ERR);
  72         return ((int)wchar);
  73         }