Add more NXDN support files.

NXDNLookup.cpp

@@ -0,0 +1,158 @@
+/*
+*   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.
+*/
+
+#include "NXDNLookup.h"
+#include "Timer.h"
+#include "Log.h"
+
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <cctype>
+
+CNXDNLookup::CNXDNLookup(const std::string& filename, unsigned int reloadTime) :
+CThread(),
+m_filename(filename),
+m_reloadTime(reloadTime),
+m_table(),
+m_mutex(),
+m_stop(false)
+{
+}
+
+CNXDNLookup::~CNXDNLookup()
+{
+}
+
+bool CNXDNLookup::read()
+{
+	bool ret = load();
+
+	if (m_reloadTime > 0U)
+		run();
+
+	return ret;
+}
+
+void CNXDNLookup::entry()
+{
+	LogInfo("Started the NXDN Id lookup reload thread");
+
+	CTimer timer(1U, 3600U * m_reloadTime);
+	timer.start();
+
+	while (!m_stop) {
+		sleep(1000U);
+
+		timer.clock();
+		if (timer.hasExpired()) {
+			load();
+			timer.start();
+		}
+	}
+
+	LogInfo("Stopped the NXDN Id lookup reload thread");
+}
+
+void CNXDNLookup::stop()
+{
+	if (m_reloadTime == 0U) {
+		delete this;
+		return;
+	}
+
+	m_stop = true;
+
+	wait();
+}
+
+std::string CNXDNLookup::find(unsigned int id)
+{
+	std::string callsign;
+
+	if (id == 0xFFFFU)
+		return std::string("ALL");
+
+	m_mutex.lock();
+
+	try {
+		callsign = m_table.at(id);
+	} catch (...) {
+		char text[10U];
+		::sprintf(text, "%u", id);
+		callsign = std::string(text);
+	}
+
+	m_mutex.unlock();
+
+	return callsign;
+}
+
+bool CNXDNLookup::exists(unsigned int id)
+{
+	m_mutex.lock();
+
+	bool found = m_table.count(id) == 1U;
+
+	m_mutex.unlock();
+
+	return found;
+}
+
+bool CNXDNLookup::load()
+{
+	FILE* fp = ::fopen(m_filename.c_str(), "rt");
+	if (fp == NULL) {
+		LogWarning("Cannot open the NXDN Id lookup file - %s", m_filename.c_str());
+		return false;
+	}
+
+	m_mutex.lock();
+
+	// Remove the old entries
+	m_table.clear();
+
+	char buffer[100U];
+	while (::fgets(buffer, 100U, fp) != NULL) {
+		if (buffer[0U] == '#')
+			continue;
+
+		char* p1 = ::strtok(buffer, ",\t\r\n");
+		char* p2 = ::strtok(NULL, ",\t\r\n");
+
+		if (p1 != NULL && p2 != NULL) {
+			unsigned int id = (unsigned int)::atoi(p1);
+			for (char* p = p2; *p != 0x00U; p++)
+				*p = ::toupper(*p);
+
+			m_table[id] = std::string(p2);
+		}
+	}
+
+	m_mutex.unlock();
+
+	::fclose(fp);
+
+	size_t size = m_table.size();
+	if (size == 0U)
+		return false;
+
+	LogInfo("Loaded %u Ids to the NXDN callsign lookup table", size);
+
+	return true;
+}