diff options
Diffstat (limited to 'lib/unictype/combining.c')
-rw-r--r-- | lib/unictype/combining.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/lib/unictype/combining.c b/lib/unictype/combining.c new file mode 100644 index 0000000..dfddc90 --- /dev/null +++ b/lib/unictype/combining.c @@ -0,0 +1,47 @@ +/* Combining classes of Unicode characters. + Copyright (C) 2002, 2006, 2009-2010 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 <http://www.gnu.org/licenses/>. */ + +#include <config.h> + +/* Specification. */ +#include "unictype.h" + +/* Define u_combclass table. */ +#include "combining.h" + +int +uc_combining_class (ucs4_t uc) +{ + unsigned int index1 = uc >> combclass_header_0; + if (index1 < combclass_header_1) + { + int lookup1 = u_combclass.level1[index1]; + if (lookup1 >= 0) + { + unsigned int index2 = (uc >> combclass_header_2) & combclass_header_3; + int lookup2 = u_combclass.level2[lookup1 + index2]; + if (lookup2 >= 0) + { + unsigned int index3 = (uc & combclass_header_4); + unsigned int lookup3 = u_combclass.level3[lookup2 + index3]; + + return lookup3; + } + } + } + return 0; +} |