Mercurial > gnulib
view lib/unicase/u-is-invariant.h @ 40057:b06060465f09
maint: Run 'make update-copyright'
author | Paul Eggert <eggert@cs.ucla.edu> |
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date | Tue, 01 Jan 2019 00:25:11 +0100 |
parents | 10eb9086bea0 |
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/* Test whether a Unicode string is invariant under a given case mapping. Copyright (C) 2009-2019 Free Software Foundation, Inc. Written by Bruno Haible <bruno@clisp.org>, 2009. This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program 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 for more details. You should have received a copy of the GNU Lesser 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; }