/src/libunistring/lib/unicase/simple-mapping.h
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1 | | /* Simple case mapping for Unicode characters. |
2 | | Copyright (C) 2002, 2006, 2009-2022 Free Software Foundation, Inc. |
3 | | Written by Bruno Haible <bruno@clisp.org>, 2009. |
4 | | |
5 | | This file is free software. |
6 | | It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+". |
7 | | You can redistribute it and/or modify it under either |
8 | | - the terms of the GNU Lesser General Public License as published |
9 | | by the Free Software Foundation; either version 3, or (at your |
10 | | option) any later version, or |
11 | | - the terms of the GNU General Public License as published by the |
12 | | Free Software Foundation; either version 2, or (at your option) |
13 | | any later version, or |
14 | | - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+". |
15 | | |
16 | | This file is distributed in the hope that it will be useful, |
17 | | but WITHOUT ANY WARRANTY; without even the implied warranty of |
18 | | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
19 | | Lesser General Public License and the GNU General Public License |
20 | | for more details. |
21 | | |
22 | | You should have received a copy of the GNU Lesser General Public |
23 | | License and of the GNU General Public License along with this |
24 | | program. If not, see <https://www.gnu.org/licenses/>. */ |
25 | | |
26 | | ucs4_t |
27 | | FUNC (ucs4_t uc) |
28 | 0 | { |
29 | 0 | unsigned int index1 = uc >> mapping_header_0; |
30 | 0 | if (index1 < mapping_header_1) |
31 | 0 | { |
32 | 0 | int lookup1 = u_mapping.level1[index1]; |
33 | 0 | if (lookup1 >= 0) |
34 | 0 | { |
35 | 0 | unsigned int index2 = (uc >> mapping_header_2) & mapping_header_3; |
36 | 0 | int lookup2 = u_mapping.level2[lookup1 + index2]; |
37 | 0 | if (lookup2 >= 0) |
38 | 0 | { |
39 | 0 | unsigned int index3 = (uc & mapping_header_4); |
40 | 0 | int lookup3 = u_mapping.level3[lookup2 + index3]; |
41 | |
|
42 | 0 | return uc + lookup3; |
43 | 0 | } |
44 | 0 | } |
45 | 0 | } |
46 | 0 | return uc; |
47 | 0 | } |