mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 03:27:39 +00:00
bb815eafaf
We now have implement all of Musl's localization code, the same way that Musl implements localization. You may need setlocale(LC_ALL, "C.UTF-8"), just in case anything stops working as expected.
77 lines
3.6 KiB
C
77 lines
3.6 KiB
C
/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
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│ vi: set noet ft=c ts=8 sw=8 fenc=utf-8 :vi │
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╚──────────────────────────────────────────────────────────────────────────────╝
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│ │
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│ Musl Libc │
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│ Copyright © 2005-2014 Rich Felker, et al. │
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│ │
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│ Permission is hereby granted, free of charge, to any person obtaining │
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│ a copy of this software and associated documentation files (the │
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│ "Software"), to deal in the Software without restriction, including │
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│ without limitation the rights to use, copy, modify, merge, publish, │
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│ distribute, sublicense, and/or sell copies of the Software, and to │
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│ permit persons to whom the Software is furnished to do so, subject to │
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│ the following conditions: │
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│ │
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│ The above copyright notice and this permission notice shall be │
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│ included in all copies or substantial portions of the Software. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
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│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
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│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
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│ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │
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│ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │
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│ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │
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│ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
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│ │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include <stdlib.h>
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#include <wchar.h>
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#include <errno.h>
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#include "multibyte.h"
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__static_yoink("musl_libc_notice");
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#pragma GCC diagnostic ignored "-Wparentheses"
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int mbtowc(wchar_t *restrict wc, const char *restrict src, size_t n)
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{
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unsigned c;
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const unsigned char *s = (const void *)src;
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wchar_t dummy;
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if (!s) return 0;
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if (!n) goto ilseq;
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if (!wc) wc = &dummy;
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if (*s < 0x80) return !!(*wc = *s);
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if (MB_CUR_MAX==1) return (*wc = CODEUNIT(*s)), 1;
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if (*s-SA > SB-SA) goto ilseq;
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c = bittab[*s++-SA];
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/* Avoid excessive checks against n: If shifting the state n-1
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* times does not clear the high bit, then the value of n is
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* insufficient to read a character */
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if (n<4 && ((c<<(6*n-6)) & (1U<<31))) goto ilseq;
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if (OOB(c,*s)) goto ilseq;
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c = c<<6 | *s++-0x80;
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if (!(c&(1U<<31))) {
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*wc = c;
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return 2;
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}
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if (*s-0x80u >= 0x40) goto ilseq;
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c = c<<6 | *s++-0x80;
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if (!(c&(1U<<31))) {
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*wc = c;
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return 3;
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}
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if (*s-0x80u >= 0x40) goto ilseq;
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*wc = c<<6 | *s++-0x80;
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return 4;
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ilseq:
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errno = EILSEQ;
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return -1;
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}
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