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