blob: 6102b7684358de580184003376e3044e469d582f (
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
|
/* Simple case mapping for Unicode characters.
Copyright (C) 2002, 2006, 2009-2024 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2009.
This file 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 2.1 of the
License, or (at your option) any later version.
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 for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
ucs4_t
FUNC (ucs4_t uc)
{
unsigned int index1 = uc >> mapping_header_0;
if (index1 < mapping_header_1)
{
int lookup1 = u_mapping.level1[index1];
if (lookup1 >= 0)
{
unsigned int index2 = (uc >> mapping_header_2) & mapping_header_3;
int lookup2 = u_mapping.level2[lookup1 + index2];
if (lookup2 >= 0)
{
unsigned int index3 = (uc & mapping_header_4);
int lookup3 = u_mapping.level3[lookup2 + index3];
return uc + lookup3;
}
}
}
return uc;
}
|
