lib/unictype/categ_and_not.c

   1 /* Categories of Unicode characters.
   2    Copyright (C) 2007, 2009-2020 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2007.
   4
   5    This program is free software: you can redistribute it and/or modify it
   6    under the terms of the GNU Lesser General Public License as published
   7    by the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 #include <config.h>
  19
  20 /* Specification.  */
  21 #include "unictype.h"
  22
  23 uc_general_category_t
  24 uc_general_category_and_not (uc_general_category_t category1,
  25                              uc_general_category_t category2)
  26 {
  27   uint32_t bitmask;
  28   uc_general_category_t result;
  29
  30   bitmask = category1.bitmask & ~category2.bitmask;
  31
  32   if (bitmask == category1.bitmask)
  33     return category1;
  34
  35   if (bitmask == 0)
  36     return _UC_CATEGORY_NONE;
  37
  38   result.bitmask = bitmask;
  39   result.generic = 1;
  40   result.lookup.lookup_fn = &uc_is_general_category_withtable;
  41   return result;
  42 }