blob: 601d81d6e195a60e1c0af6098959eb004776883a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
/* Count characters in UTF-16 string.
Copyright (C) 2007, 2009-2010 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2007.
This program is free software: you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include "unistr.h"
size_t
u16_mbsnlen (const uint16_t *s, size_t n)
{
size_t characters;
characters = 0;
while (n > 0)
{
ucs4_t uc;
int count = u16_mbtoucr (&uc, s, n);
characters++;
if (count == -2)
break;
if (count <= 0)
count = 1;
s += count;
n -= count;
}
return characters;
}
|