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/* Test whether a Unicode string is invariant under a given case mapping.
Copyright (C) 2009-2022 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 UNIT *s, size_t n,
UNIT * (*mapping) (const UNIT *s, size_t n, const char *iso639_language,
uninorm_t nf,
UNIT *resultbuf, size_t *lengthp),
const char *iso639_language,
bool *resultp)
{
UNIT normsbuf[2048 / sizeof (UNIT)];
UNIT *norms;
size_t norms_length;
UNIT mappedbuf[2048 / sizeof (UNIT)];
UNIT *mapped;
size_t mapped_length;
/* Apply canonical decomposition to S. */
norms_length = sizeof (normsbuf) / sizeof (UNIT);
norms = U_NORMALIZE (UNINORM_NFD, s, n, normsbuf, &norms_length);
if (norms == NULL)
/* errno is set here. */
return -1;
/* Apply mapping. */
mapped_length = sizeof (mappedbuf) / sizeof (UNIT);
mapped = mapping (norms, norms_length, iso639_language, NULL,
mappedbuf, &mapped_length);
if (mapped == NULL)
{
if (norms != normsbuf)
{
int saved_errno = errno;
free (norms);
errno = saved_errno;
}
return -1;
}
/* Compare. */
*resultp = (mapped_length == norms_length
&& U_CMP (mapped, norms, norms_length) == 0);
if (mapped != mappedbuf)
free (mapped);
if (norms != normsbuf)
free (norms);
return 0;
}
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