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Paul Eggert
a3fd683de3
* build-aux/gendocs.sh (version): * doc/gendocs_template: * doc/gendocs_template_min: * doc/gnulib.texi: * lib/version-etc.c (COPYRIGHT_YEAR): Update copyright dates by hand in templates and the like. * all files: Run 'make update-copyright'.
70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/* Case and normalization insensitive comparison of Unicode strings.
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Copyright (C) 2009-2017 Free Software Foundation, Inc.
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Written by Bruno Haible <bruno@clisp.org>, 2009.
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This program is free software: you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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 for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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int
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FUNC (const SRC_UNIT *s1, size_t n1, const SRC_UNIT *s2, size_t n2,
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const char *iso639_language, uninorm_t nf, int *resultp)
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{
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UNIT buf1[2048 / sizeof (UNIT)];
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UNIT buf2[2048 / sizeof (UNIT)];
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UNIT *norms1;
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size_t norms1_length;
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UNIT *norms2;
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size_t norms2_length;
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int cmp;
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/* Optimization: There is no need to do canonical composition of each string.
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Decomposition is enough. */
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if (nf != NULL)
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nf = uninorm_decomposing_form (nf);
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/* Case-fold and normalize S1. */
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norms1_length = sizeof (buf1) / sizeof (UNIT);
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norms1 = U_CASEFOLD (s1, n1, iso639_language, nf, buf1, &norms1_length);
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if (norms1 == NULL)
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/* errno is set here. */
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return -1;
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/* Case-fold and normalize S2. */
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norms2_length = sizeof (buf2) / sizeof (UNIT);
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norms2 = U_CASEFOLD (s2, n2, iso639_language, nf, buf2, &norms2_length);
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if (norms2 == NULL)
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{
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if (norms1 != buf1)
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{
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int saved_errno = errno;
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free (norms1);
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errno = saved_errno;
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}
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return -1;
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}
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/* Compare the normalized strings. */
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cmp = U_CMP2 (norms1, norms1_length, norms2, norms2_length);
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if (cmp > 0)
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cmp = 1;
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else if (cmp < 0)
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cmp = -1;
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if (norms2 != buf2)
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free (norms2);
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if (norms1 != buf1)
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free (norms1);
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*resultp = cmp;
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return 0;
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}
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