gnulib/lib/unictype/categ_and_not.c

/* Categories of Unicode characters.
   Copyright (C) 2007, 2009-2020 Free Software Foundation, Inc.
   Written by Bruno Haible <bruno@clisp.org>, 2007.

   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"

uc_general_category_t
uc_general_category_and_not (uc_general_category_t category1,
                             uc_general_category_t category2)
{
  uint32_t bitmask;
  uc_general_category_t result;

  bitmask = category1.bitmask & ~category2.bitmask;

  if (bitmask == category1.bitmask)
    return category1;

  if (bitmask == 0)
    return _UC_CATEGORY_NONE;

  result.bitmask = bitmask;
  result.generic = 1;
  result.lookup.lookup_fn = &uc_is_general_category_withtable;
  return result;
}