root/maint/gnulib/lib/unictype/identsyntaxmap.h

/* */

INCLUDED FROM

DEFINITIONS

1. identsyntax_lookup

   1 /* Three-level bitmap lookup.
   2    Copyright (C) 2000-2002, 2005-2007, 2009-2021 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2000-2002.
   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 static inline int identsyntax_lookup (ucs4_t uc);
  27 
  28 static inline int
  29 identsyntax_lookup (ucs4_t uc)
     /*  */
  30 {
  31   unsigned int index1 = uc >> identsyntax_header_0;
  32   if (index1 < identsyntax_header_1)
  33     {
  34       int lookup1 = TABLE.level1[index1];
  35       if (lookup1 >= 0)
  36         {
  37           unsigned int index2 = (uc >> identsyntax_header_2) & identsyntax_header_3;
  38           int lookup2 = TABLE.level2[lookup1 + index2];
  39           if (lookup2 >= 0)
  40             {
  41               unsigned int index3 = (uc & identsyntax_header_4) + lookup2;
  42               /* level3 contains 2-bit values.  */
  43               unsigned int lookup3 = TABLE.level3[index3 >> 3];
  44 
  45               return (lookup3 >> (2 * (index3 & 7))) & 3;
  46             }
  47         }
  48     }
  49   return UC_IDENTIFIER_INVALID;
  50 }

/* */