| /* Simple case mapping for Unicode characters. | |
| Copyright (C) 2002, 2006, 2009-2025 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; | |
| } | |