1 files changed, 81 insertions, 0 deletions
diff --git a/lib/unictype/categ_of.c b/lib/unictype/categ_of.c
new file mode 100644
index 0000000..85b694f
--- /dev/null
+++ b/lib/unictype/categ_of.c
@@ -0,0 +1,81 @@
+/* Categories of Unicode characters.
+   Copyright (C) 2002, 2006-2007 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_category table.  */
+#include "categ_of.h"
+
+static inline int
+lookup_withtable (ucs4_t uc)
+{
+  unsigned int index1 = uc >> category_header_0;
+  if (index1 < category_header_1)
+    {
+      int lookup1 = u_category.level1[index1];
+      if (lookup1 >= 0)
+	{
+	  unsigned int index2 = (uc >> category_header_2) & category_header_3;
+	  int lookup2 = u_category.level2[lookup1 + index2];
+	  if (lookup2 >= 0)
+	    {
+	      unsigned int index3 = ((uc & category_header_4) + lookup2) * 5;
+	      /* level3 contains 5-bit values, packed into 16-bit words.  */
+	      unsigned int lookup3 =
+		((u_category.level3[index3>>4]
+		  | (u_category.level3[(index3>>4)+1] << 16))
+		 >> (index3 % 16))
+		& 0x1f;
+
+	      return lookup3;
+	    }
+	}
+      return 29; /* = log2(UC_CATEGORY_MASK_Cn) */
+    }
+  return -1;
+}
+
+bool
+uc_is_general_category_withtable (ucs4_t uc, uint32_t bitmask)
+{
+  int bit = lookup_withtable (uc);
+
+  if (bit >= 0)
+    return ((bitmask >> bit) & 1);
+  else
+    return false;
+}
+
+uc_general_category_t
+uc_general_category (ucs4_t uc)
+{
+  int bit = lookup_withtable (uc);
+  uc_general_category_t result;
+
+  if (bit >= 0)
+    {
+      result.bitmask = 1 << bit;
+      result.generic = 1;
+      result.lookup.lookup_fn = &uc_is_general_category_withtable;
+      return result;
+    }
+  else
+    return _UC_CATEGORY_NONE;
+}