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diff --git a/engines/titanic/true_talk/tt_quotes_tree.h b/engines/titanic/true_talk/tt_quotes_tree.h
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+++ b/engines/titanic/true_talk/tt_quotes_tree.h
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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef TITANIC_TT_QUOTES_TREE_H
+#define TITANIC_TT_QUOTES_TREE_H
+
+#include "common/scummsys.h"
+#include "common/stream.h"
+#include "titanic/support/string.h"
+
+namespace Titanic {
+
+#define QUOTES_TREE_COUNT 1022
+
+enum QuoteTreeNum { TREE_1 = 0, TREE_2 = 1, TREE_3 = 2 };
+
+struct TTquotesTreeEntry {
+	uint _id;
+	TTquotesTreeEntry *_subTable;
+	CString _string;
+
+	TTquotesTreeEntry() : _id(0), _subTable(nullptr) {}
+};
+
+class TTtreeResult {
+public:
+	int _id;
+	const TTquotesTreeEntry *_treeItemP;
+public:
+	TTtreeResult() : _id(0), _treeItemP(nullptr) {}
+};
+
+class TTquotesTree {
+private:
+	TTquotesTreeEntry _entries[QUOTES_TREE_COUNT];
+private:
+	/**
+	 * First inner search method
+	 */
+	bool search1(const char **str, const TTquotesTreeEntry *bTree,
+		TTtreeResult *buffer, uint tagId);
+
+	/**
+	 * Second inner search method
+	 */
+	bool search2(const char **str, const TTquotesTreeEntry *bTree,
+		TTtreeResult *buffer, uint tagId);
+
+	/**
+	 * Compare the current word in the string against a specified word
+	 */
+	bool compareWord(const char **str, const char *refStr);
+public:
+	/**
+	 * Load data for the quotes tree
+	 */
+	void load();
+
+	int search(const char *str, QuoteTreeNum treeNum,
+		TTtreeResult *buffer, uint tagId, uint *remainder);
+};
+
+} // End of namespace Titanic
+
+#endif /* TITANIC_TT_QUOTES_TREE_H */