40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
/*
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* Copyright (c) 2014 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* wchar/btowc.c
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* Single byte to wide character conversion.
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*/
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#include <errno.h>
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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 btowc(int ic)
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{
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if ( ic == EOF )
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return WEOF;
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unsigned char uc = (unsigned char) ic;
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char c = (char) uc;
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mbstate_t ps;
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memset(&ps, 0, sizeof(ps));
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wchar_t wc;
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int saved_errno = errno;
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size_t status = mbrtowc(&wc, (const char*) &c, 1, &ps);
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if ( status == (size_t) -1 || status == (size_t) -2 )
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return errno = saved_errno, WEOF;
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return (wint_t) wc;
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}
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