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Add Musl multibyte functions

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These are standard functions that are needed to help support the Skull
language. Note that normally this codebase uses libc/str/thompike.h

See #105
This commit is contained in:
Justine Tunney 2021-03-06 09:52:29 -08:00
parent cfd453d125
commit 11ec99931b
28 changed files with 1064 additions and 131 deletions
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68
libc/str/wcrtomb.c Normal file
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@ -0,0 +1,68 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╚──────────────────────────────────────────────────────────────────────────────╝
│ │
│ Musl Libc │
│ Copyright © 2005-2014 Rich Felker, et al. │
│ │
│ Permission is hereby granted, free of charge, to any person obtaining │
│ a copy of this software and associated documentation files (the │
│ "Software"), to deal in the Software without restriction, including │
│ without limitation the rights to use, copy, modify, merge, publish, │
│ distribute, sublicense, and/or sell copies of the Software, and to │
│ permit persons to whom the Software is furnished to do so, subject to │
│ the following conditions: │
│ │
│ The above copyright notice and this permission notice shall be │
│ included in all copies or substantial portions of the Software. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
│ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │
│ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │
│ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │
│ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
│ │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/errno.h"
#include "libc/limits.h"
#include "libc/str/mb.internal.h"
#include "libc/str/str.h"
asm(".ident\t\"\\n\\n\
Musl libc (MIT License)\\n\
Copyright 2005-2014 Rich Felker, et. al.\"");
asm(".include \"libc/disclaimer.inc\"");
size_t wcrtomb(char *s, wchar_t wc, mbstate_t *st) {
if (!s) return 1;
if ((unsigned)wc < 0x80) {
*s = wc;
return 1;
} else if (MB_CUR_MAX == 1) {
if (!IS_CODEUNIT(wc)) {
errno = EILSEQ;
return -1;
}
*s = wc;
return 1;
} else if ((unsigned)wc < 0x800) {
*s++ = 0xc0 | (wc >> 6);
*s = 0x80 | (wc & 0x3f);
return 2;
} else if ((unsigned)wc < 0xd800 || (unsigned)wc - 0xe000 < 0x2000) {
*s++ = 0xe0 | (wc >> 12);
*s++ = 0x80 | ((wc >> 6) & 0x3f);
*s = 0x80 | (wc & 0x3f);
return 3;
} else if ((unsigned)wc - 0x10000 < 0x100000) {
*s++ = 0xf0 | (wc >> 18);
*s++ = 0x80 | ((wc >> 12) & 0x3f);
*s++ = 0x80 | ((wc >> 6) & 0x3f);
*s = 0x80 | (wc & 0x3f);
return 4;
}
errno = EILSEQ;
return -1;
}