| /* Simple case mapping for Unicode characters. |
| Copyright (C) 2002, 2006, 2009-2026 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; |
| } |
