/* Locale dependent, normalization insensitive comparison of Unicode strings.
   Copyright (C) 2009-2018 Free Software Foundation, Inc.
   Written by Bruno Haible <bruno@clisp.org>, 2009.

   This program is free software: you can redistribute it and/or
   modify it under the terms of either:

     * the GNU Lesser General Public License as published by the Free
       Software Foundation; either version 3 of the License, or (at your
       option) any later version.

   or

     * the GNU General Public License as published by the Free
       Software Foundation; either version 2 of the License, or (at your
       option) any later version.

   or both in parallel, as here.
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

int
FUNC (const UNIT *s1, size_t n1, const UNIT *s2, size_t n2,
      uninorm_t nf, int *resultp)
{
  char buf1[2048];
  char buf2[2048];
  char *transformed1;
  size_t transformed1_length;
  char *transformed2;
  size_t transformed2_length;
  int cmp;

  /* Normalize and transform S1.  */
  transformed1_length = sizeof (buf1);
  transformed1 = U_NORMXFRM (s1, n1, nf, buf1, &transformed1_length);
  if (transformed1 == NULL)
    /* errno is set here.  */
    return -1;

  /* Normalize and transform S2.  */
  transformed2_length = sizeof (buf2);
  transformed2 = U_NORMXFRM (s2, n2, nf, buf2, &transformed2_length);
  if (transformed2 == NULL)
    {
      if (transformed1 != buf1)
        {
          int saved_errno = errno;
          free (transformed1);
          errno = saved_errno;
        }
      return -1;
    }

  /* Compare the transformed strings.  */
  cmp = memcmp2 (transformed1, transformed1_length,
                 transformed2, transformed2_length);
  if (cmp < 0)
    cmp = -1;
  else if (cmp > 0)
    cmp = 1;

  if (transformed2 != buf2)
    free (transformed2);
  if (transformed1 != buf1)
    free (transformed1);
  *resultp = cmp;
  return 0;
}
