| /* Bidi classes of Unicode characters. |
| Copyright (C) 2002, 2006, 2011-2020 Free Software Foundation, Inc. |
| Written by Bruno Haible <bruno@clisp.org>, 2002. |
| |
| This program 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 3 of the License, or |
| (at your option) any later version. |
| |
| This program 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/>. */ |
| |
| #include <config.h> |
| |
| /* Specification. */ |
| #include "unictype.h" |
| |
| /* Define u_bidi_category table. */ |
| #include "bidi_of.h" |
| |
| int |
| uc_bidi_class (ucs4_t uc) |
| { |
| unsigned int index1 = uc >> bidi_category_header_0; |
| if (index1 < bidi_category_header_1) |
| { |
| int lookup1 = u_bidi_category.level1[index1]; |
| if (lookup1 >= 0) |
| { |
| unsigned int index2 = (uc >> bidi_category_header_2) & bidi_category_header_3; |
| int lookup2 = u_bidi_category.level2[lookup1 + index2]; |
| if (lookup2 >= 0) |
| { |
| unsigned int index3 = ((uc & bidi_category_header_4) + lookup2) * 5; |
| /* level3 contains 5-bit values, packed into 16-bit words. */ |
| unsigned int lookup3 = |
| (((unsigned int) u_bidi_category.level3[index3>>4] |
| | ((unsigned int) u_bidi_category.level3[(index3>>4)+1] << 16)) |
| >> (index3 % 16)) |
| & 0x1f; |
| |
| return lookup3; |
| } |
| } |
| } |
| return UC_BIDI_L; |
| } |
| |
| int |
| uc_bidi_category (ucs4_t uc) |
| { |
| return uc_bidi_class (uc); |
| } |