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authorAndreas Rottmann <a.rottmann@gmx.at>2009-09-14 12:32:44 +0200
committerAndreas Rottmann <a.rottmann@gmx.at>2009-09-14 12:32:44 +0200
commitfa095a4504cbe668e4244547e2c141597bea4ecf (patch)
tree06135820a286ffec47804e75fbf8a147e92acd2e /lib/unicase/u-is-cased.h
Imported Upstream version 0.9.1upstream/0.9.1
Diffstat (limited to 'lib/unicase/u-is-cased.h')
-rw-r--r--lib/unicase/u-is-cased.h128
1 files changed, 128 insertions, 0 deletions
diff --git a/lib/unicase/u-is-cased.h b/lib/unicase/u-is-cased.h
new file mode 100644
index 00000000..b96a60f0
--- /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;
+}