root/maint/gnulib/lib/unicase/simple-mapping.h

/* */

INCLUDED FROM

DEFINITIONS

1. FUNC

   1 /* Simple case mapping for Unicode characters.
   2    Copyright (C) 2002, 2006, 2009-2021 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2009.
   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 ucs4_t
  27 FUNC (ucs4_t uc)
     /*  */
  28 {
  29   unsigned int index1 = uc >> mapping_header_0;
  30   if (index1 < mapping_header_1)
  31     {
  32       int lookup1 = u_mapping.level1[index1];
  33       if (lookup1 >= 0)
  34         {
  35           unsigned int index2 = (uc >> mapping_header_2) & mapping_header_3;
  36           int lookup2 = u_mapping.level2[lookup1 + index2];
  37           if (lookup2 >= 0)
  38             {
  39               unsigned int index3 = (uc & mapping_header_4);
  40               int lookup3 = u_mapping.level3[lookup2 + index3];
  41 
  42               return uc + lookup3;
  43             }
  44         }
  45     }
  46   return uc;
  47 }

/* */