40 lines
2.2 KiB
C
40 lines
2.2 KiB
C
/*-*- 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/str/str.h"
|
|
|
|
/**
|
|
* Returns number of characters in UTF-8 string.
|
|
*/
|
|
size_t strclen(const char *s) {
|
|
return strnclen(s, -1);
|
|
}
|
|
|
|
noinline size_t strnclen(const char *s, size_t n) {
|
|
size_t r = 0;
|
|
if (n) {
|
|
while (n && *s && (*s & 0300) == 0200) ++s, --n;
|
|
while (*s) {
|
|
if ((*s++ & 0300) != 0200) r++;
|
|
if (!--n) break;
|
|
}
|
|
}
|
|
return r;
|
|
}
|