diff options
Diffstat (limited to 'lib/unictype/joininggroup_of.c')
-rw-r--r-- | lib/unictype/joininggroup_of.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/lib/unictype/joininggroup_of.c b/lib/unictype/joininggroup_of.c new file mode 100644 index 0000000..1626231 --- /dev/null +++ b/lib/unictype/joininggroup_of.c @@ -0,0 +1,52 @@ +/* Arabic joining group of Unicode characters. + Copyright (C) 2011-2015 Free Software Foundation, Inc. + Written by Bruno Haible <bruno@clisp.org>, 2011. + + 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_joining_group table. */ +#include "joininggroup_of.h" + +int +uc_joining_group (ucs4_t uc) +{ + unsigned int index1 = uc >> joining_group_header_0; + if (index1 < joining_group_header_1) + { + int lookup1 = u_joining_group.level1[index1]; + if (lookup1 >= 0) + { + unsigned int index2 = (uc >> joining_group_header_2) & joining_group_header_3; + int lookup2 = u_joining_group.level2[lookup1 + index2]; + if (lookup2 >= 0) + { + unsigned int index3 = ((uc & joining_group_header_4) + lookup2) * 7; + /* level3 contains 7-bit values, packed into 16-bit words. */ + unsigned int lookup3 = + ((u_joining_group.level3[index3>>4] + | ((unsigned int) u_joining_group.level3[(index3>>4)+1] << 16)) + >> (index3 % 16)) + & 0x7f; + + return lookup3; + } + } + } + return UC_JOINING_GROUP_NONE; +} |