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/* Case and normalization insensitive comparison of Unicode strings.
Copyright (C) 2009-2024 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2009.
This file is free software.
It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
You can redistribute it and/or modify it under either
- the terms of the GNU Lesser General Public License as published
by the Free Software Foundation, either version 3, or (at your
option) any later version, or
- the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option)
any later version, or
- the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
This file 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 and the GNU General Public License
for more details.
You should have received a copy of the GNU Lesser General Public
License and of the GNU General Public License along with this
program. If not, see <https://www.gnu.org/licenses/>. */
int
FUNC (const SRC_UNIT *s1, size_t n1, const SRC_UNIT *s2, size_t n2,
const char *iso639_language, uninorm_t nf, int *resultp)
{
UNIT buf1[2048 / sizeof (UNIT)];
UNIT buf2[2048 / sizeof (UNIT)];
UNIT *norms1;
size_t norms1_length;
UNIT *norms2;
size_t norms2_length;
int cmp;
/* Optimization: There is no need to do canonical composition of each string.
Decomposition is enough. */
if (nf != NULL)
nf = uninorm_decomposing_form (nf);
/* Case-fold and normalize S1. */
norms1_length = sizeof (buf1) / sizeof (UNIT);
norms1 = U_CASEFOLD (s1, n1, iso639_language, nf, buf1, &norms1_length);
if (norms1 == NULL)
/* errno is set here. */
return -1;
/* Case-fold and normalize S2. */
norms2_length = sizeof (buf2) / sizeof (UNIT);
norms2 = U_CASEFOLD (s2, n2, iso639_language, nf, buf2, &norms2_length);
if (norms2 == NULL)
{
if (norms1 != buf1)
{
int saved_errno = errno;
free (norms1);
errno = saved_errno;
}
return -1;
}
/* Compare the normalized strings. */
cmp = U_CMP2 (norms1, norms1_length, norms2, norms2_length);
if (cmp > 0)
cmp = 1;
else if (cmp < 0)
cmp = -1;
if (norms2 != buf2)
free (norms2);
if (norms1 != buf1)
free (norms1);
*resultp = cmp;
return 0;
}
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