diff options
author | Bruno Haible <bruno@clisp.org> | 2009-03-08 17:16:07 +0100 |
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committer | Bruno Haible <bruno@clisp.org> | 2009-03-08 17:16:07 +0100 |
commit | 131f56a39d8a0ba23a7437c27319a6a3b16ff280 (patch) | |
tree | 058ef50f90c1361ab5814a5c596f848852524806 /lib | |
parent | dd412b522f4a971554af8d6636ca34d9c9931edd (diff) | |
download | gnulib-131f56a39d8a0ba23a7437c27319a6a3b16ff280.tar.gz |
New module 'unicase/u8-is-cased'.
Diffstat (limited to 'lib')
-rw-r--r-- | lib/unicase/u-is-cased.h | 128 | ||||
-rw-r--r-- | lib/unicase/u8-is-cased.c | 36 |
2 files changed, 164 insertions, 0 deletions
diff --git a/lib/unicase/u-is-cased.h b/lib/unicase/u-is-cased.h new file mode 100644 index 0000000000..b96a60f0ce --- /dev/null +++ b/lib/unicase/u-is-cased.h @@ -0,0 +1,128 @@ +/* Test whether case matters for a Unicode string. + 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 UNIT *s, size_t n, const char *iso639_language, + bool *resultp) +{ + UNIT normsbuf[2048 / sizeof (UNIT)]; + UNIT *norms; + size_t norms_length; + UNIT mappedbuf[2048 / sizeof (UNIT)]; + UNIT *mapped_toupper; + UNIT *mapped_tolower; + UNIT *mapped_totitle; + 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; + + mapped_length = sizeof (mappedbuf) / sizeof (UNIT); + + /* Apply toupper mapping. */ + mapped_toupper = U_TOUPPER (norms, norms_length, iso639_language, NULL, + mappedbuf, &mapped_length); + if (mapped_toupper == NULL) + goto fail; + + /* Compare. */ + if (!(mapped_length == norms_length + && U_CMP (mapped_toupper, norms, norms_length) == 0)) + { + if (mapped_toupper != mappedbuf) + free (mapped_toupper); + goto yes; + } + + /* Apply tolower mapping. */ + mapped_tolower = U_TOLOWER (norms, norms_length, iso639_language, NULL, + mapped_toupper, &mapped_length); + if (mapped_tolower == NULL) + { + if (mapped_toupper != mappedbuf) + { + int saved_errno = errno; + free (mapped_toupper); + errno = saved_errno; + } + goto fail; + } + + if (mapped_toupper != mapped_tolower && mapped_toupper != mappedbuf) + free (mapped_toupper); + + /* Compare. */ + if (!(mapped_length == norms_length + && U_CMP (mapped_tolower, norms, norms_length) == 0)) + { + if (mapped_tolower != mappedbuf) + free (mapped_tolower); + goto yes; + } + + /* Apply totitle mapping. */ + mapped_totitle = U_TOTITLE (norms, norms_length, iso639_language, NULL, + mapped_tolower, &mapped_length); + if (mapped_totitle == NULL) + { + if (mapped_tolower != mappedbuf) + { + int saved_errno = errno; + free (mapped_tolower); + errno = saved_errno; + } + goto fail; + } + + if (mapped_tolower != mapped_totitle && mapped_tolower != mappedbuf) + free (mapped_tolower); + + /* Compare. */ + if (!(mapped_length == norms_length + && U_CMP (mapped_totitle, norms, norms_length) == 0)) + { + if (mapped_totitle != mappedbuf) + free (mapped_totitle); + goto yes; + } + + if (mapped_totitle != mappedbuf) + free (mapped_totitle); + if (norms != normsbuf) + free (norms); + *resultp = false; + return 0; + + yes: + if (norms != normsbuf) + free (norms); + *resultp = true; + return 0; + + fail: + if (norms != normsbuf) + { + int saved_errno = errno; + free (norms); + errno = saved_errno; + } + return -1; +} diff --git a/lib/unicase/u8-is-cased.c b/lib/unicase/u8-is-cased.c new file mode 100644 index 0000000000..5cdcc33b24 --- /dev/null +++ b/lib/unicase/u8-is-cased.c @@ -0,0 +1,36 @@ +/* Test whether case matters for an UTF-8 string. + 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/>. */ + +#include <config.h> + +/* Specification. */ +#include "unicase.h" + +#include <errno.h> +#include <stdlib.h> + +#include "uninorm.h" +#include "unistr.h" + +#define FUNC u8_is_cased +#define UNIT uint8_t +#define U_NORMALIZE u8_normalize +#define U_TOUPPER u8_toupper +#define U_TOLOWER u8_tolower +#define U_TOTITLE u8_totitle +#define U_CMP u8_cmp +#include "u-is-cased.h" |