1 files changed, 42 insertions, 0 deletions
diff --git a/lib/unictype/categ_and_not.c b/lib/unictype/categ_and_not.c
new file mode 100644
index 0000000..6cc2759
--- /dev/null
+++ b/lib/unictype/categ_and_not.c
@@ -0,0 +1,42 @@
+/* Categories of Unicode characters.
+   Copyright (C) 2007 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2007.
+
+   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"
+
+uc_general_category_t
+uc_general_category_and_not (uc_general_category_t category1,
+			     uc_general_category_t category2)
+{
+  uint32_t bitmask;
+  uc_general_category_t result;
+
+  bitmask = category1.bitmask & ~category2.bitmask;
+
+  if (bitmask == category1.bitmask)
+    return category1;
+
+  if (bitmask == 0)
+    return _UC_CATEGORY_NONE;
+
+  result.bitmask = bitmask;
+  result.generic = 1;
+  result.lookup.lookup_fn = &uc_is_general_category_withtable;
+  return result;
+}