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diff --git a/fbreader/src/formats/chm/CHMReferenceCollection.h b/fbreader/src/formats/chm/CHMReferenceCollection.h
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+++ b/fbreader/src/formats/chm/CHMReferenceCollection.h
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+/*
+ * Copyright (C) 2004-2012 Geometer Plus <[email protected]>
+ *
+ * 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 __CHMREFERENCECOLLECTION_H__
+#define __CHMREFERENCECOLLECTION_H__
+
+#include <string>
+#include <set>
+#include <queue>
+
+class CHMReferenceCollection {
+
+public:
+	static std::string fullReference(const std::string &prefix, std::string reference);
+
+public:
+	CHMReferenceCollection();
+	const std::string &addReference(const std::string &reference, bool doConvert);
+	bool containsNonProcessedReferences() const;
+	const std::string nextReference();
+	void setPrefix(const std::string &fileName);
+	const std::string &prefix() const;
+
+private:
+	std::string myPrefix;
+	std::set<std::string> myReferences;
+	std::queue<std::string> myReferenceQueue;
+
+private:
+	CHMReferenceCollection(const CHMReferenceCollection&);
+	const CHMReferenceCollection &operator = (const CHMReferenceCollection&);
+};
+
+#endif /* __CHMREFERENCECOLLECTION_H__ */