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

• /* Values of decimal digit 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.
     It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
     You can redistribute it and/or modify it under either
       - the terms of the GNU Lesser General Public License as published
         by the Free Software Foundation, either version 3, or (at your
         option) any later version, or
       - the terms of the GNU General Public License as published by the
         Free Software Foundation; either version 2, or (at your option)
         any later version, or
       - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
  
     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 and the GNU General Public License
     for more details.
  
     You should have received a copy of the GNU Lesser General Public
     License and of the GNU General Public License along with this
     program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include "unictype.h"
  
  /* Define u_decdigit table.  */
  #include "decdigit.h"
  
  int
  uc_decimal_value (ucs4_t uc)
  {
    unsigned int index1 = uc >> decdigit_header_0;
    if (index1 < decdigit_header_1)
      {
        int lookup1 = u_decdigit.level1[index1];
        if (lookup1 >= 0)
          {
            unsigned int index2 = (uc >> decdigit_header_2) & decdigit_header_3;
            int lookup2 = u_decdigit.level2[lookup1 + index2];
            if (lookup2 >= 0)
              {
                unsigned int index3 = (uc & decdigit_header_4) + lookup2;
                /* level3 contains 4-bit values.  */
                unsigned int lookup3 =
                  (u_decdigit.level3[index3>>1] >> ((index3 % 2) * 4)) & 0x0f;
  
                return (int) lookup3 - 1;
              }
          }
      }
    return -1;
  }
  

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