root/maint/gnulib/lib/unicase/u-casecmp.h

/* */

INCLUDED FROM

DEFINITIONS

1. FUNC

   1 /* Case and normalization insensitive comparison of Unicode strings.
   2    Copyright (C) 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 int
  27 FUNC (const SRC_UNIT *s1, size_t n1, const SRC_UNIT *s2, size_t n2,
     /*  */
  28       const char *iso639_language, uninorm_t nf, int *resultp)
  29 {
  30   UNIT buf1[2048 / sizeof (UNIT)];
  31   UNIT buf2[2048 / sizeof (UNIT)];
  32   UNIT *norms1;
  33   size_t norms1_length;
  34   UNIT *norms2;
  35   size_t norms2_length;
  36   int cmp;
  37 
  38   /* Optimization: There is no need to do canonical composition of each string.
  39      Decomposition is enough.  */
  40   if (nf != NULL)
  41     nf = uninorm_decomposing_form (nf);
  42 
  43   /* Case-fold and normalize S1.  */
  44   norms1_length = sizeof (buf1) / sizeof (UNIT);
  45   norms1 = U_CASEFOLD (s1, n1, iso639_language, nf, buf1, &norms1_length);
  46   if (norms1 == NULL)
  47     /* errno is set here.  */
  48     return -1;
  49 
  50   /* Case-fold and normalize S2.  */
  51   norms2_length = sizeof (buf2) / sizeof (UNIT);
  52   norms2 = U_CASEFOLD (s2, n2, iso639_language, nf, buf2, &norms2_length);
  53   if (norms2 == NULL)
  54     {
  55       if (norms1 != buf1)
  56         {
  57           int saved_errno = errno;
  58           free (norms1);
  59           errno = saved_errno;
  60         }
  61       return -1;
  62     }
  63 
  64   /* Compare the normalized strings.  */
  65   cmp = U_CMP2 (norms1, norms1_length, norms2, norms2_length);
  66   if (cmp > 0)
  67     cmp = 1;
  68   else if (cmp < 0)
  69     cmp = -1;
  70 
  71   if (norms2 != buf2)
  72     free (norms2);
  73   if (norms1 != buf1)
  74     free (norms1);
  75   *resultp = cmp;
  76   return 0;
  77 }

/* */