1/* Simple case mapping for Unicode characters.
2   Copyright (C) 2002, 2006, 2009-2010 Free Software Foundation, Inc.
3   Written by Bruno Haible <bruno@clisp.org>, 2009.
4
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.
9
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.
14
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/>.  */
17
18ucs4_t
19FUNC (ucs4_t uc)
20{
21  unsigned int index1 = uc >> mapping_header_0;
22  if (index1 < mapping_header_1)
23    {
24      int lookup1 = u_mapping.level1[index1];
25      if (lookup1 >= 0)
26        {
27          unsigned int index2 = (uc >> mapping_header_2) & mapping_header_3;
28          int lookup2 = u_mapping.level2[lookup1 + index2];
29          if (lookup2 >= 0)
30            {
31              unsigned int index3 = (uc & mapping_header_4);
32              int lookup3 = u_mapping.level3[lookup2 + index3];
33
34              return uc + lookup3;
35            }
36        }
37    }
38  return uc;
39}
40