81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
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/* Convert wide character to multibyte character.
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Copyright (C) 2008-2020 Free Software Foundation, Inc.
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Written by Bruno Haible <bruno@clisp.org>, 2008.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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/* Specification. */
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#include <wchar.h>
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#include <errno.h>
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#include <stdlib.h>
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size_t
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wcrtomb (char *s, wchar_t wc, mbstate_t *ps)
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#undef wcrtomb
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{
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/* This implementation of wcrtomb supports only stateless encodings.
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ps must be in the initial state. */
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if (ps != NULL && !mbsinit (ps))
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{
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errno = EINVAL;
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return (size_t)(-1);
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}
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#if !HAVE_WCRTOMB /* IRIX 6.5 */ \
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|| WCRTOMB_RETVAL_BUG /* Solaris 11.3, MSVC */ \
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|| WCRTOMB_C_LOCALE_BUG /* Android */
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if (s == NULL)
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/* We know the NUL wide character corresponds to the NUL character. */
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return 1;
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else
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#endif
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{
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#if HAVE_WCRTOMB
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# if WCRTOMB_C_LOCALE_BUG /* Android */
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/* Implement consistently with mbrtowc(): through a 1:1 correspondence,
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as in ISO-8859-1. */
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if (wc >= 0 && wc <= 0xff)
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{
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*s = (unsigned char) wc;
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return 1;
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}
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else
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{
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errno = EILSEQ;
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return (size_t)(-1);
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}
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# else
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return wcrtomb (s, wc, ps);
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# endif
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#else /* IRIX 6.5 */
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/* Fallback for platforms that don't have wcrtomb().
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Implement on top of wctomb().
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This code is not multithread-safe. */
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int ret = wctomb (s, wc);
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if (ret >= 0)
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return ret;
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else
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{
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errno = EILSEQ;
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return (size_t)(-1);
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}
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#endif
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}
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}
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