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43 lines
1.5 KiB
C++
43 lines
1.5 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2013, 2014.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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stdlib/mblen.cpp
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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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extern "C" 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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