diff options
Diffstat (limited to 'lib/uninorm/u-normxfrm.h')
-rw-r--r-- | lib/uninorm/u-normxfrm.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/lib/uninorm/u-normxfrm.h b/lib/uninorm/u-normxfrm.h new file mode 100644 index 0000000..6ed1e3c --- /dev/null +++ b/lib/uninorm/u-normxfrm.h @@ -0,0 +1,87 @@ +/* Locale dependent transformation for 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/>. */ + +char * +FUNC (const UNIT *s, size_t n, uninorm_t nf, + char *resultbuf, size_t *lengthp) +{ + UNIT normsbuf[2048 / sizeof (UNIT)]; + UNIT *norms; + size_t norms_length; + char convsbuf[2048]; + char *convs; + size_t convs_length; + char *result; + + /* Normalize the Unicode string. */ + norms_length = sizeof (normsbuf) / sizeof (UNIT); + norms = U_NORMALIZE (nf, s, n, normsbuf, &norms_length); + if (norms == NULL) + /* errno is set here. */ + return NULL; + + /* Convert it to locale encoding. */ + convs_length = sizeof (convsbuf) - 1; + convs = U_CONV_TO_ENCODING (locale_charset (), + iconveh_error, + norms, norms_length, + NULL, + convsbuf, &convs_length); + if (convs == NULL) + { + if (norms != normsbuf) + { + int saved_errno = errno; + free (norms); + errno = saved_errno; + } + return NULL; + } + + if (norms != normsbuf) + free (norms); + + /* Ensure one more byte is available. */ + if (convs != convsbuf) + { + char *memory = (char *) realloc (convs, convs_length + 1); + if (memory == NULL) + { + free (convs); + errno = ENOMEM; + return NULL; + } + convs = memory; + } + + /* Apply locale dependent transformations for comparison. */ + result = memxfrm (convs, convs_length, resultbuf, lengthp); + if (result == NULL) + { + if (convs != convsbuf) + { + int saved_errno = errno; + free (convs); + errno = saved_errno; + } + return NULL; + } + + if (convs != convsbuf) + free (convs); + return result; +} |