1 files changed, 25 insertions, 0 deletions
diff --git a/lib/dns/include/dns/bit.h b/lib/dns/include/dns/bit.h
new file mode 100644
index 0000000..dc7c195
--- /dev/null
+++ b/lib/dns/include/dns/bit.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+#pragma once
+
+/*! \file dns/bit.h */
+
+#include <inttypes.h>
+
+typedef uint64_t dns_bitset_t;
+
+#define DNS_BIT_SET(bit, bitset)   (*(bitset) |= ((dns_bitset_t)1 << (bit)))
+#define DNS_BIT_CLEAR(bit, bitset) (*(bitset) &= ~((dns_bitset_t)1 << (bit)))
+#define DNS_BIT_CHECK(bit, bitset) \
+	((*(bitset) & ((dns_bitset_t)1 << (bit))) == ((dns_bitset_t)1 << (bit)))