maint/gnulib/lib/unictype/mirror.c

/* */
This source file includes following definitions.
uc_mirror_char
   1 /* Mirrored Unicode characters.
   2    Copyright (C) 2002, 2006, 2009-2021 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 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 #include <config.h>
  27 
  28 /* Specification.  */
  29 #include "unictype.h"
  30 
  31 /* Define u_mirror table.  */
  32 #include "mirror.h"
  33 
  34 bool
  35 uc_mirror_char (ucs4_t uc, ucs4_t *puc)
     /*  */
  36 {
  37   unsigned int index1 = uc >> mirror_header_0;
  38   if (index1 < mirror_header_1)
  39     {
  40       int lookup1 = u_mirror.level1[index1];
  41       if (lookup1 >= 0)
  42         {
  43           unsigned int index2 = (uc >> mirror_header_2) & mirror_header_3;
  44           int lookup2 = u_mirror.level2[lookup1 + index2];
  45           if (lookup2 >= 0)
  46             {
  47               unsigned int index3 = (uc & mirror_header_4);
  48               int lookup3 = u_mirror.level3[lookup2 + index3];
  49 
  50               *puc = uc + lookup3;
  51               return (lookup3 != 0);
  52             }
  53         }
  54     }
  55   *puc = uc;
  56   return false;
  57 }
/* */
root/maint/gnulib/lib/unictype/mirror.c

DEFINITIONS
