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diff --git a/ioreplay/src/datas/btree.h b/ioreplay/src/datas/btree.h
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+// Copyright 2018 Mimecast Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef BTREE_H
+#define BTREE_H
+
+#include "../defaults.h"
+
+/**
+ * @brief This defines an element of the binary tree data structure
+ */
+typedef struct btreelem_ {
+    struct btreelem_ *left; /**< The next element to the left */
+    struct btreelem_ *right; /**< The next element to the right */
+    int key; /**< The key of the element */
+    void *data; /**< A pointer to the data stored in this element */
+} btreelem_s;
+
+/**
+ * @brief This defines a binary tree data structure.
+ */
+typedef struct btree_s_ {
+    btreelem_s *root; /**< The root element */
+    int size; /**< The current size of the binary tree */
+} btree_s;
+
+btree_s* btree_new();
+void btree_destroy(btree_s *b);
+void btree_destroy2(btree_s *b);
+int btree_insert(btree_s *b, int key, void *data);
+void* btree_get(btree_s *b, int key);
+void btree_print(btree_s *b);
+
+btreelem_s* btreelem_new(int key, void *data);
+void btreelem_destroy_r(btreelem_s *e);
+void btreelem_destroy_r2(btreelem_s *e);
+int btreelem_insert_r(btreelem_s *e, int key, void *data);
+void* btreelem_get_r(btreelem_s *e, int key);
+void btreelem_print_r(btreelem_s *e, int depth);
+
+#endif // BTREE_H