diff options
Diffstat (limited to 'lib/unicase/u-casecmp.h')
-rw-r--r-- | lib/unicase/u-casecmp.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/lib/unicase/u-casecmp.h b/lib/unicase/u-casecmp.h new file mode 100644 index 0000000..e1cf99c --- /dev/null +++ b/lib/unicase/u-casecmp.h @@ -0,0 +1,69 @@ +/* Case and normalization insensitive comparison of Unicode strings. + Copyright (C) 2009 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 <http://www.gnu.org/licenses/>. */ + +int +FUNC (const SRC_UNIT *s1, size_t n1, const SRC_UNIT *s2, size_t n2, + const char *iso639_language, uninorm_t nf, int *resultp) +{ + UNIT buf1[2048 / sizeof (UNIT)]; + UNIT buf2[2048 / sizeof (UNIT)]; + UNIT *norms1; + size_t norms1_length; + UNIT *norms2; + size_t norms2_length; + int cmp; + + /* Optimization: There is no need to do canonical composition of each string. + Decomposition is enough. */ + if (nf != NULL) + nf = uninorm_decomposing_form (nf); + + /* Case-fold and normalize S1. */ + norms1_length = sizeof (buf1) / sizeof (UNIT); + norms1 = U_CASEFOLD (s1, n1, iso639_language, nf, buf1, &norms1_length); + if (norms1 == NULL) + /* errno is set here. */ + return -1; + + /* Case-fold and normalize S2. */ + norms2_length = sizeof (buf2) / sizeof (UNIT); + norms2 = U_CASEFOLD (s2, n2, iso639_language, nf, buf2, &norms2_length); + if (norms2 == NULL) + { + if (norms1 != buf1) + { + int saved_errno = errno; + free (norms1); + errno = saved_errno; + } + return -1; + } + + /* Compare the normalized strings. */ + cmp = U_CMP2 (norms1, norms1_length, norms2, norms2_length); + if (cmp > 0) + cmp = 1; + else if (cmp < 0) + cmp = -1; + + if (norms2 != buf2) + free (norms2); + if (norms1 != buf1) + free (norms1); + *resultp = cmp; + return 0; +} |