mirror of
https://github.com/jart/cosmopolitan.git
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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.
83 lines
3.7 KiB
C
83 lines
3.7 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 <wchar.h>
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__static_yoink("musl_libc_notice");
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size_t mbsnrtowcs(wchar_t *restrict wcs, const char **restrict src, size_t n, size_t wn, mbstate_t *restrict st)
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{
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size_t l, cnt=0, n2;
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wchar_t *ws, wbuf[256];
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const char *s = *src;
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const char *tmp_s;
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if (!wcs) ws = wbuf, wn = sizeof wbuf / sizeof *wbuf;
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else ws = wcs;
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/* making sure output buffer size is at most n/4 will ensure
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* that mbsrtowcs never reads more than n input bytes. thus
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* we can use mbsrtowcs as long as it's practical.. */
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while ( s && wn && ( (n2=n/4)>=wn || n2>32 ) ) {
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if (n2>=wn) n2=wn;
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tmp_s = s;
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l = mbsrtowcs(ws, &s, n2, st);
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if (!(l+1)) {
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cnt = l;
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wn = 0;
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break;
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}
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if (ws != wbuf) {
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ws += l;
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wn -= l;
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}
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n = s ? n - (s - tmp_s) : 0;
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cnt += l;
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}
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if (s) while (wn && n) {
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l = mbrtowc(ws, s, n, st);
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if (l+2<=2) {
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if (!(l+1)) {
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cnt = l;
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break;
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}
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if (!l) {
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s = 0;
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break;
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}
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/* have to roll back partial character */
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*(unsigned *)st = 0;
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break;
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}
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s += l; n -= l;
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/* safe - this loop runs fewer than sizeof(wbuf)/8 times */
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ws++; wn--;
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cnt++;
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}
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if (wcs) *src = s;
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return cnt;
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}
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