45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
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/* Convert multibyte character to wide character.
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Copyright (C) 2011-2020 Free Software Foundation, Inc.
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Written by Bruno Haible <bruno@clisp.org>, 2011.
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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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/* We don't need a static internal state, because the encoding is not state
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dependent, and when mbrtowc returns (size_t)(-2). we throw the result
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away. */
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int
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mbtowc (wchar_t *pwc, const char *s, size_t n)
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{
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if (s == NULL)
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return 0;
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else
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{
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mbstate_t state;
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wchar_t wc;
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size_t result;
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memset (&state, 0, sizeof (mbstate_t));
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result = mbrtowc (&wc, s, n, &state);
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if (result == (size_t)-1 || result == (size_t)-2)
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{
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errno = EILSEQ;
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return -1;
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}
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if (pwc != NULL)
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*pwc = wc;
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return (wc == 0 ? 0 : result);
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}
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}
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