usr/src/lib/libcurses/screen/wcstombs.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 <widec.h>
  36 #include <limits.h>
  37 #include <sys/types.h>
  38 #include "curses_inc.h"
  39
  40 size_t
  41 _curs_wcstombs(char *s, const wchar_t *pwcs, size_t n)
  42 {
  43         int     val;
  44         int     total = 0;
  45         char    temp[MB_LEN_MAX];
  46         int     i;
  47
  48         for (; ; ) {
  49                 if (*pwcs == 0) {
  50                         *s = '\0';
  51                         break;
  52                 }
  53                 if ((val = _curs_wctomb(temp, *pwcs++)) == -1)
  54                         return (val);
  55                 if ((total += val) > n) {
  56                         total -= val;
  57                         break;
  58                 }
  59                 for (i = 0; i < val; i++)
  60                         *s++ = temp[i];
  61         }
  62         return (total);
  63 }