kc3-lang/gnulib/lib/unictype/combiningclass.c

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• Hash : 32a72f45
  Author :
  Date : 2023-01-01T01:14:21
  

  maint: run 'make update-copyright'
  

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• lib/unictype/combiningclass.c

• /* Combining classes of Unicode characters.
     Copyright (C) 2002, 2006, 2009-2023 Free Software Foundation, Inc.
     Written by Bruno Haible <bruno@clisp.org>, 2002.
  
     This file 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 2.1 of the
     License, or (at your option) any later version.
  
     This file 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"
  
  /* Define u_combclass table.  */
  #include "combiningclass.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;
  }
  

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