lib/unictype/categ_and_not.c

   1 /* Categories of Unicode characters.
   2    Copyright (C) 2007, 2009-2024 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2007.
   4
   5    This file is free software.
   6    It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
   7    You can redistribute it and/or modify it under either
   8      - the terms of the GNU Lesser General Public License as published
   9        by the Free Software Foundation, either version 3, or (at your
  10        option) any later version, or
  11      - the terms of the GNU General Public License as published by the
  12        Free Software Foundation; either version 2, or (at your option)
  13        any later version, or
  14      - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
  15
  16    This file is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19    Lesser General Public License and the GNU General Public License
  20    for more details.
  21
  22    You should have received a copy of the GNU Lesser General Public
  23    License and of the GNU General Public License along with this
  24    program.  If not, see <https://www.gnu.org/licenses/>.  */
  25
  26 #include <config.h>
  27
  28 /* Specification.  */
  29 #include "unictype.h"
  30
  31 uc_general_category_t
  32 uc_general_category_and_not (uc_general_category_t category1,
  33                              uc_general_category_t category2)
  34 {
  35   uint32_t bitmask;
  36   uc_general_category_t result;
  37
  38   bitmask = category1.bitmask & ~category2.bitmask;
  39
  40   if (bitmask == category1.bitmask)
  41     return category1;
  42
  43   if (bitmask == 0)
  44     return _UC_CATEGORY_NONE;
  45
  46   result.bitmask = bitmask;
  47   result.generic = 1;
  48   result.lookup.lookup_fn = &uc_is_general_category_withtable;
  49   return result;
  50 }