1 /* Mirrored Unicode characters.
2 Copyright (C) 2002, 2006, 2009-2018 Free Software Foundation, Inc.
3 Written by Bruno Haible <bruno@clisp.org>, 2002.
5 This program is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Lesser General Public License as published
7 by the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
23 /* Define u_mirror table. */
27 uc_mirror_char (ucs4_t uc
, ucs4_t
*puc
)
29 unsigned int index1
= uc
>> mirror_header_0
;
30 if (index1
< mirror_header_1
)
32 int lookup1
= u_mirror
.level1
[index1
];
35 unsigned int index2
= (uc
>> mirror_header_2
) & mirror_header_3
;
36 int lookup2
= u_mirror
.level2
[lookup1
+ index2
];
39 unsigned int index3
= (uc
& mirror_header_4
);
40 int lookup3
= u_mirror
.level3
[lookup2
+ index3
];
43 return (lookup3
!= 0);