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04277e02d7
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/* Copyright (C) 2011-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <uchar.h>
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#include <wchar.h>
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/* This is the private state used if PS is NULL. */
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static mbstate_t state;
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size_t
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c16rtomb (char *s, char16_t c16, mbstate_t *ps)
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{
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wchar_t wc = c16;
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if (ps == NULL)
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ps = &state;
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if (s == NULL)
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{
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/* Reset any state relating to surrogate pairs. */
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ps->__count &= 0x7fffffff;
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ps->__value.__wch = 0;
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wc = 0;
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}
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if (ps->__count & 0x80000000)
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{
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/* The previous call passed in the first surrogate of a
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surrogate pair. */
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ps->__count &= 0x7fffffff;
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if (wc >= 0xdc00 && wc < 0xe000)
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wc = (0x10000
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+ ((ps->__value.__wch & 0x3ff) << 10)
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+ (wc & 0x3ff));
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else
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/* This is not a low surrogate; ensure an EILSEQ error by
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trying to decode the high surrogate as a wide character on
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its own. */
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wc = ps->__value.__wch;
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ps->__value.__wch = 0;
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}
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else if (wc >= 0xd800 && wc < 0xdc00)
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{
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/* The high part of a surrogate pair. */
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ps->__count |= 0x80000000;
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ps->__value.__wch = wc;
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return 0;
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}
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return wcrtomb (s, wc, ps);
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}
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