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Justine Tunney 2020-06-15 07:18:57 -07:00
commit c91b3c5006
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libc/fmt/mbsrtowcs.c Normal file
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/*-*- 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│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/fmt/fmt.h"
#include "libc/limits.h"
#include "libc/str/str.h"
size_t mbsrtowcs(wchar_t *dest, const char **src, size_t len, mbstate_t *ps) {
/* TODO(jart): Need to fix. */
const unsigned char *s = (const void *)*src;
size_t wn0 = len;
unsigned c = 0;
if (!dest) return strlen((const char *)s);
for (;;) {
if (!len) {
*src = (const void *)s;
return wn0;
}
if (!*s) break;
c = *s++;
*dest++ = c;
len--;
}
*dest = 0;
*src = 0;
return wn0 - len;
}