| /* $OpenBSD: btowc.c,v 1.3 2015/09/12 16:23:14 guenther Exp $ */ |
| |
| /*- |
| * Copyright (c) 2002, 2003 Tim J. Robbins. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <wchar.h> |
| |
| wint_t |
| btowc(int c) |
| { |
| mbstate_t mbs; |
| char cc; |
| wchar_t wc; |
| |
| if (c == EOF) |
| return (WEOF); |
| /* |
| * We expect mbrtowc() to return 0 or 1, hence the check for n > 1 |
| * which detects error return values as well as "impossible" byte |
| * counts. |
| */ |
| memset(&mbs, 0, sizeof(mbs)); |
| cc = (char)c; |
| if (mbrtowc(&wc, &cc, 1, &mbs) > 1) |
| return (WEOF); |
| return (wc); |
| } |
| DEF_STRONG(btowc); |
