lib/unicase/u-casecoll.h

   1 /* Locale dependent, case and normalization insensitive comparison of Unicode
   2    strings.
   3    Copyright (C) 2009-2018 Free Software Foundation, Inc.
   4    Written by Bruno Haible <bruno@clisp.org>, 2009.
   5
   6    This program is free software: you can redistribute it and/or modify it
   7    under the terms of the GNU Lesser General Public License as published
   8    by the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public License
  17    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  18
  19 int
  20 FUNC (const UNIT *s1, size_t n1, const UNIT *s2, size_t n2,
  21       const char *iso639_language, uninorm_t nf, int *resultp)
  22 {
  23   char buf1[2048];
  24   char buf2[2048];
  25   char *transformed1;
  26   size_t transformed1_length;
  27   char *transformed2;
  28   size_t transformed2_length;
  29   int cmp;
  30
  31   /* Normalize and transform S1.  */
  32   transformed1_length = sizeof (buf1);
  33   transformed1 =
  34     U_CASEXFRM (s1, n1, iso639_language, nf, buf1, &transformed1_length);
  35   if (transformed1 == NULL)
  36     /* errno is set here.  */
  37     return -1;
  38
  39   /* Normalize and transform S2.  */
  40   transformed2_length = sizeof (buf2);
  41   transformed2 =
  42     U_CASEXFRM (s2, n2, iso639_language, nf, buf2, &transformed2_length);
  43   if (transformed2 == NULL)
  44     {
  45       if (transformed1 != buf1)
  46         {
  47           int saved_errno = errno;
  48           free (transformed1);
  49           errno = saved_errno;
  50         }
  51       return -1;
  52     }
  53
  54   /* Compare the transformed strings.  */
  55   cmp = memcmp2 (transformed1, transformed1_length,
  56                  transformed2, transformed2_length);
  57   if (cmp < 0)
  58     cmp = -1;
  59   else if (cmp > 0)
  60     cmp = 1;
  61
  62   if (transformed2 != buf2)
  63     free (transformed2);
  64   if (transformed1 != buf1)
  65     free (transformed1);
  66   *resultp = cmp;
  67   return 0;
  68 }