1 files changed, 38 insertions, 0 deletions
diff --git a/lib/isc/region.c b/lib/isc/region.c
new file mode 100644
index 0000000..2f85842
--- /dev/null
+++ b/lib/isc/region.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * 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 http://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+
+/*! \file */
+
+#include <config.h>
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <isc/region.h>
+#include <isc/util.h>
+
+int
+isc_region_compare(isc_region_t *r1, isc_region_t *r2) {
+	unsigned int l;
+	int result;
+
+	REQUIRE(r1 != NULL);
+	REQUIRE(r2 != NULL);
+
+	l = (r1->length < r2->length) ? r1->length : r2->length;
+
+	if ((result = memcmp(r1->base, r2->base, l)) != 0)
+		return ((result < 0) ? -1 : 1);
+	else
+		return ((r1->length == r2->length) ? 0 :
+			(r1->length < r2->length) ? -1 : 1);
+}