lib/uninorm/u-normcoll.h

   1 /* Locale dependent, normalization insensitive comparison of Unicode strings.
   2    Copyright (C) 2009-2019 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2009.
   4
   5    This program is free software: you can redistribute it and/or modify it
   6    under the terms of the GNU Lesser General Public License as published
   7    by the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 int
  19 FUNC (const UNIT *s1, size_t n1, const UNIT *s2, size_t n2,
  20       uninorm_t nf, int *resultp)
  21 {
  22   char buf1[2048];
  23   char buf2[2048];
  24   char *transformed1;
  25   size_t transformed1_length;
  26   char *transformed2;
  27   size_t transformed2_length;
  28   int cmp;
  29
  30   /* Normalize and transform S1.  */
  31   transformed1_length = sizeof (buf1);
  32   transformed1 = U_NORMXFRM (s1, n1, nf, buf1, &transformed1_length);
  33   if (transformed1 == NULL)
  34     /* errno is set here.  */
  35     return -1;
  36
  37   /* Normalize and transform S2.  */
  38   transformed2_length = sizeof (buf2);
  39   transformed2 = U_NORMXFRM (s2, n2, nf, buf2, &transformed2_length);
  40   if (transformed2 == NULL)
  41     {
  42       if (transformed1 != buf1)
  43         {
  44           int saved_errno = errno;
  45           free (transformed1);
  46           errno = saved_errno;
  47         }
  48       return -1;
  49     }
  50
  51   /* Compare the transformed strings.  */
  52   cmp = memcmp2 (transformed1, transformed1_length,
  53                  transformed2, transformed2_length);
  54   if (cmp < 0)
  55     cmp = -1;
  56   else if (cmp > 0)
  57     cmp = 1;
  58
  59   if (transformed2 != buf2)
  60     free (transformed2);
  61   if (transformed1 != buf1)
  62     free (transformed1);
  63   *resultp = cmp;
  64   return 0;
  65 }