1 files changed, 49 insertions, 0 deletions
diff --git a/lib/unictype/mirror.c b/lib/unictype/mirror.c
new file mode 100644
index 0000000..7577544
--- /dev/null
+++ b/lib/unictype/mirror.c
@@ -0,0 +1,49 @@
+/* Mirrored Unicode characters.
+   Copyright (C) 2002, 2006 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_mirror table.  */
+#include "mirror.h"
+
+bool
+uc_mirror_char (ucs4_t uc, ucs4_t *puc)
+{
+  unsigned int index1 = uc >> mirror_header_0;
+  if (index1 < mirror_header_1)
+    {
+      int lookup1 = u_mirror.level1[index1];
+      if (lookup1 >= 0)
+	{
+	  unsigned int index2 = (uc >> mirror_header_2) & mirror_header_3;
+	  int lookup2 = u_mirror.level2[lookup1 + index2];
+	  if (lookup2 >= 0)
+	    {
+	      unsigned int index3 = (uc & mirror_header_4);
+	      int lookup3 = u_mirror.level3[lookup2 + index3];
+
+	      *puc = uc + lookup3;
+	      return (lookup3 != 0);
+	    }
+	}
+    }
+  *puc = uc;
+  return false;
+}