1 files changed, 88 insertions, 0 deletions
diff --git a/lib/unicase/u-casexfrm.h b/lib/unicase/u-casexfrm.h
new file mode 100644
index 00000000..e36aff3b
--- /dev/null
+++ b/lib/unicase/u-casexfrm.h
@@ -0,0 +1,88 @@
+/* Locale dependent transformation for case 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/>.  */
+
+char *
+FUNC (const UNIT *s, size_t n, const char *iso639_language, uninorm_t nf,
+      char *resultbuf, size_t *lengthp)
+{
+  UNIT foldedsbuf[2048 / sizeof (UNIT)];
+  UNIT *foldeds;
+  size_t foldeds_length;
+  char convsbuf[2048];
+  char *convs;
+  size_t convs_length;
+  char *result;
+
+  /* Casefold and normalize the Unicode string.  */
+  foldeds_length = sizeof (foldedsbuf) / sizeof (UNIT);
+  foldeds = U_CASEFOLD (s, n, iso639_language, nf, foldedsbuf, &foldeds_length);
+  if (foldeds == 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,
+			      foldeds, foldeds_length,
+			      NULL,
+			      convsbuf, &convs_length);
+  if (convs == NULL)
+    {
+      if (foldeds != foldedsbuf)
+	{
+	  int saved_errno = errno;
+	  free (foldeds);
+	  errno = saved_errno;
+	}
+      return NULL;
+    }
+
+  if (foldeds != foldedsbuf)
+    free (foldeds);
+
+  /* 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;
+}