38 lines
2.3 KiB
C
38 lines
2.3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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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; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ 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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│ General Public License for more details. │
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│ │
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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, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/limits.h"
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#include "libc/macros.h"
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#include "libc/str/str.h"
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#include "libc/str/tpdecode.internal.h"
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compatfn int mbtowc(wchar_t *wc, const char *s, size_t n) {
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if (!s) return 0;
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alignas(8) char alt[ROUNDUP(MB_CUR_MAX, 8)];
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if (n < MB_CUR_MAX) {
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memset(alt, 0, sizeof(alt));
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memcpy(alt, s, n);
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s = &alt[0];
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}
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wint_t wi;
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int rc = tpdecode(s, &wi);
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if (wc) *wc = (wchar_t)wi;
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return rc;
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}
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