39 lines
1.3 KiB
C
39 lines
1.3 KiB
C
/*
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* Copyright (c) 2013, 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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* stdlib/mblen.c
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* Determine number of bytes in next multibyte character.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <wchar.h>
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// TODO: This function is unpure and should be removed.
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int mblen(const char* s, size_t n)
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{
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wchar_t wc;
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static mbstate_t ps;
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size_t result = mbrtowc(&wc, s, n, &ps);
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if ( !s )
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memset(&ps, 0, sizeof(ps));
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if ( result == (size_t) -1 )
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return memset(&ps, 0, sizeof(ps)), -1;
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// TODO: Should ps be cleared to zero in this case?
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if ( result == (size_t) -2 )
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return -1;
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return (int) result;
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}
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