add leveldb

lib/leveldb/util/options.cc

@@ -0,0 +1,14 @@
+// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file. See the AUTHORS file for names of contributors.
+
+#include "leveldb/options.h"
+
+#include "leveldb/comparator.h"
+#include "leveldb/env.h"
+
+namespace leveldb {
+
+Options::Options() : comparator(BytewiseComparator()), env(nullptr) {}
+
+}  // namespace leveldb