Add more NXDN support files.

NXDNLookup.h

@@ -0,0 +1,53 @@
+/*
+*   Copyright (C) 2016,2017,2018 by Jonathan Naylor G4KLX
+*
+*   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., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifndef	NXDNLookup_H
+#define	NXDNLookup_H
+
+#include "Thread.h"
+#include "Mutex.h"
+
+#include <string>
+#include <unordered_map>
+
+class CNXDNLookup : public CThread {
+public:
+	CNXDNLookup(const std::string& filename, unsigned int reloadTime);
+	virtual ~CNXDNLookup();
+
+	bool read();
+
+	virtual void entry();
+
+	std::string find(unsigned int id);
+
+	bool exists(unsigned int id);
+
+	void stop();
+
+private:
+	std::string                                   m_filename;
+	unsigned int                                  m_reloadTime;
+	std::unordered_map<unsigned int, std::string> m_table;
+	CMutex                                        m_mutex;
+	bool                                          m_stop;
+
+	bool load();
+};
+
+#endif