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
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
/* Look at first character in UTF-16 string.
Copyright (C) 1999-2002, 2006-2007, 2009-2024 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2001.
This file is free software.
It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
You can redistribute it and/or modify it under either
- the terms of the GNU Lesser General Public License as published
by the Free Software Foundation, either version 3, or (at your
option) any later version, or
- the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option)
any later version, or
- the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
This file 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 and the GNU General Public License
for more details.
You should have received a copy of the GNU Lesser General Public
License and of the GNU General Public License along with this
program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#if defined IN_LIBUNISTRING
/* Tell unistr.h to declare u16_mbtouc_unsafe as 'extern', not
'static inline'. */
# include "unistring-notinline.h"
#endif
/* Specification. */
#include "unistr.h"
#if !HAVE_INLINE
int
u16_mbtouc_unsafe (ucs4_t *puc, const uint16_t *s, size_t n)
{
uint16_t c = *s;
if (c < 0xd800 || c >= 0xe000)
{
*puc = c;
return 1;
}
if (c < 0xdc00)
{
if (n >= 2)
{
if (s[1] >= 0xdc00 && s[1] < 0xe000)
{
*puc = 0x10000 + ((c - 0xd800) << 10) + (s[1] - 0xdc00);
return 2;
}
/* invalid multibyte character */
}
else
{
/* incomplete multibyte character */
}
}
/* invalid multibyte character */
*puc = 0xfffd;
return 1;
}
#endif
|
