1 /* Test whether a Unicode string is invariant under a given case mapping. 2 Copyright (C) 2009-2021 Free Software Foundation, Inc. 3 Written by Bruno Haible <bruno@clisp.org>, 2009. 4 5 This file is free software. 6 It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+". 7 You can redistribute it and/or modify it under either 8 - the terms of the GNU Lesser General Public License as published 9 by the Free Software Foundation; either version 3, or (at your 10 option) any later version, or 11 - the terms of the GNU General Public License as published by the 12 Free Software Foundation; either version 2, or (at your option) 13 any later version, or 14 - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+". 15 16 This file is distributed in the hope that it will be useful, 17 but WITHOUT ANY WARRANTY; without even the implied warranty of 18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 Lesser General Public License and the GNU General Public License 20 for more details. 21 22 You should have received a copy of the GNU Lesser General Public 23 License and of the GNU General Public License along with this 24 program. If not, see <https://www.gnu.org/licenses/>. */ 25 26 int 27 FUNC (const UNIT *s, size_t n, /* */ 28 UNIT * (*mapping) (const UNIT *s, size_t n, const char *iso639_language, 29 uninorm_t nf, 30 UNIT *resultbuf, size_t *lengthp), 31 const char *iso639_language, 32 bool *resultp) 33 { 34 UNIT normsbuf[2048 / sizeof (UNIT)]; 35 UNIT *norms; 36 size_t norms_length; 37 UNIT mappedbuf[2048 / sizeof (UNIT)]; 38 UNIT *mapped; 39 size_t mapped_length; 40 41 /* Apply canonical decomposition to S. */ 42 norms_length = sizeof (normsbuf) / sizeof (UNIT); 43 norms = U_NORMALIZE (UNINORM_NFD, s, n, normsbuf, &norms_length); 44 if (norms == NULL) 45 /* errno is set here. */ 46 return -1; 47 48 /* Apply mapping. */ 49 mapped_length = sizeof (mappedbuf) / sizeof (UNIT); 50 mapped = mapping (norms, norms_length, iso639_language, NULL, 51 mappedbuf, &mapped_length); 52 if (mapped == NULL) 53 { 54 if (norms != normsbuf) 55 { 56 int saved_errno = errno; 57 free (norms); 58 errno = saved_errno; 59 } 60 return -1; 61 } 62 63 /* Compare. */ 64 *resultp = (mapped_length == norms_length 65 && U_CMP (mapped, norms, norms_length) == 0); 66 67 if (mapped != mappedbuf) 68 free (mapped); 69 if (norms != normsbuf) 70 free (norms); 71 return 0; 72 }