96 lines
2.9 KiB
C
Executable File
96 lines
2.9 KiB
C
Executable File
/* Locale dependent transformation for comparison of Unicode strings.
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Copyright (C) 2009-2024 Free Software Foundation, Inc.
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Written by Bruno Haible <bruno@clisp.org>, 2009.
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This file is free software.
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It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
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You can redistribute it and/or modify it under either
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- the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation, either version 3, or (at your
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option) any later version, or
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- the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option)
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any later version, or
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- the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License and the GNU General Public License
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for more details.
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You should have received a copy of the GNU Lesser General Public
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License and of the GNU General Public License along with this
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program. If not, see <https://www.gnu.org/licenses/>. */
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char *
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FUNC (const UNIT *s, size_t n, uninorm_t nf,
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char *resultbuf, size_t *lengthp)
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{
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UNIT normsbuf[2048 / sizeof (UNIT)];
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UNIT *norms;
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size_t norms_length;
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char convsbuf[2048];
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char *convs;
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size_t convs_length;
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char *result;
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/* Normalize the Unicode string. */
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norms_length = sizeof (normsbuf) / sizeof (UNIT);
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norms = U_NORMALIZE (nf, s, n, normsbuf, &norms_length);
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if (norms == NULL)
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/* errno is set here. */
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return NULL;
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/* Convert it to locale encoding. */
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convs_length = sizeof (convsbuf) - 1;
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convs = U_CONV_TO_ENCODING (locale_charset (),
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iconveh_error,
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norms, norms_length,
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NULL,
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convsbuf, &convs_length);
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if (convs == NULL)
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{
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if (norms != normsbuf)
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{
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int saved_errno = errno;
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free (norms);
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errno = saved_errno;
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}
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return NULL;
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}
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if (norms != normsbuf)
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free (norms);
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/* Ensure one more byte is available. */
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if (convs != convsbuf)
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{
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char *memory = (char *) realloc (convs, convs_length + 1);
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if (memory == NULL)
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{
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free (convs);
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errno = ENOMEM;
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return NULL;
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}
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convs = memory;
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}
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/* Apply locale dependent transformations for comparison. */
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result = amemxfrm (convs, convs_length, resultbuf, lengthp);
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if (result == NULL)
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{
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if (convs != convsbuf)
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{
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int saved_errno = errno;
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free (convs);
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errno = saved_errno;
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}
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return NULL;
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}
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if (convs != convsbuf)
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free (convs);
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return result;
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}
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