kc3-lang/gnulib/lib/unictype/identsyntaxmap.h

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• Hash : 4b948321
  Author :
  Date : 2021-01-01T07:28:52
  

  maint: run 'make update-copyright'
  

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• lib/unictype/identsyntaxmap.h

• /* Three-level bitmap lookup.
     Copyright (C) 2000-2002, 2005-2007, 2009-2021 Free Software Foundation, Inc.
     Written by Bruno Haible <bruno@clisp.org>, 2000-2002.
  
     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/>.  */
  
  static inline int identsyntax_lookup (ucs4_t uc);
  
  static inline int
  identsyntax_lookup (ucs4_t uc)
  {
    unsigned int index1 = uc >> identsyntax_header_0;
    if (index1 < identsyntax_header_1)
      {
        int lookup1 = TABLE.level1[index1];
        if (lookup1 >= 0)
          {
            unsigned int index2 = (uc >> identsyntax_header_2) & identsyntax_header_3;
            int lookup2 = TABLE.level2[lookup1 + index2];
            if (lookup2 >= 0)
              {
                unsigned int index3 = (uc & identsyntax_header_4) + lookup2;
                /* level3 contains 2-bit values.  */
                unsigned int lookup3 = TABLE.level3[index3 >> 3];
  
                return (lookup3 >> (2 * (index3 & 7))) & 3;
              }
          }
      }
    return UC_IDENTIFIER_INVALID;
  }
  

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