1 files changed, 47 insertions, 0 deletions
diff --git a/lib/unictype/combiningclass.c b/lib/unictype/combiningclass.c
new file mode 100644
index 0000000..05b0ede
--- /dev/null
+++ b/lib/unictype/combiningclass.c
@@ -0,0 +1,47 @@
+/* Combining classes of Unicode characters.
+   Copyright (C) 2002, 2006, 2009-2015 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   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 "unictype.h"
+
+/* Define u_combclass table.  */
+#include "combiningclass.h"
+
+int
+uc_combining_class (ucs4_t uc)
+{
+  unsigned int index1 = uc >> combclass_header_0;
+  if (index1 < combclass_header_1)
+    {
+      int lookup1 = u_combclass.level1[index1];
+      if (lookup1 >= 0)
+        {
+          unsigned int index2 = (uc >> combclass_header_2) & combclass_header_3;
+          int lookup2 = u_combclass.level2[lookup1 + index2];
+          if (lookup2 >= 0)
+            {
+              unsigned int index3 = (uc & combclass_header_4);
+              unsigned int lookup3 = u_combclass.level3[lookup2 + index3];
+
+              return lookup3;
+            }
+        }
+    }
+  return 0;
+}