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/* Locale dependent transformation for case insensitive comparison of 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/>. */
#include <config.h>
/* Specification. */
#include "unicase.h"
#include <errno.h>
#include <stdlib.h>
#include "uniconv.h"
char *
ulc_casexfrm (const char *s, size_t n, const char *iso639_language,
uninorm_t nf,
char *resultbuf, size_t *lengthp)
{
uint8_t convbuf[2048 / sizeof (uint8_t)];
uint8_t *conv;
size_t conv_length;
char *result;
/* Convert the string to UTF-8. */
conv_length = sizeof (convbuf) / sizeof (uint8_t);
conv =
u8_conv_from_encoding (locale_charset (), iconveh_error, s, n, NULL,
convbuf, &conv_length);
if (conv == NULL)
/* errno is set here. */
return NULL;
/* Case-fold and normalize. */
result = u8_casexfrm (conv, conv_length, iso639_language, nf,
resultbuf, lengthp);
if (result == NULL)
{
if (conv != convbuf)
{
int saved_errno = errno;
free (conv);
errno = saved_errno;
}
return NULL;
}
if (conv != convbuf)
free (conv);
return result;
}
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