1 /* Arabic joining group of Unicode characters.
2 Copyright (C) 2011-2016 Free Software Foundation, Inc.
3 Written by Bruno Haible <bruno@clisp.org>, 2011.
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 <http://www.gnu.org/licenses/>. */
23 /* Define u_joining_group table. */
24 #include "joininggroup_of.h"
27 uc_joining_group (ucs4_t uc)
29 unsigned int index1 = uc >> joining_group_header_0;
30 if (index1 < joining_group_header_1)
32 int lookup1 = u_joining_group.level1[index1];
35 unsigned int index2 = (uc >> joining_group_header_2) & joining_group_header_3;
36 int lookup2 = u_joining_group.level2[lookup1 + index2];
39 unsigned int index3 = ((uc & joining_group_header_4) + lookup2) * 7;
40 /* level3 contains 7-bit values, packed into 16-bit words. */
41 unsigned int lookup3 =
42 ((u_joining_group.level3[index3>>4]
43 | ((unsigned int) u_joining_group.level3[(index3>>4)+1] << 16))
51 return UC_JOINING_GROUP_NONE;