MMDVMHost-Private/DMRLookup.cpp

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/*
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* Copyright (C) 2016,2017 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 "DMRLookup.h"
#include "Timer.h"
#include "Log.h"
#include <cstdio>
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#include <cstdlib>
#include <cstring>
#include <cctype>
CDMRLookup::CDMRLookup(const std::string& filename, unsigned int reloadTime) :
CThread(),
m_filename(filename),
m_reloadTime(reloadTime),
m_table(),
m_mutex(),
m_stop(false)
{
}
CDMRLookup::~CDMRLookup()
{
}
bool CDMRLookup::read()
{
bool ret = load();
if (m_reloadTime > 0U)
run();
return ret;
}
void CDMRLookup::entry()
{
LogInfo("Started the DMR 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 DMR Id lookup reload thread");
}
void CDMRLookup::stop()
{
if (m_reloadTime == 0U) {
delete this;
return;
}
m_stop = true;
wait();
}
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std::string CDMRLookup::findWithName(unsigned int id)
{
std::string callsign;
if (id == 0xFFFFFFU)
return std::string("ALL");
m_mutex.lock();
try {
callsign = m_table.at(id);
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LogDebug("FindWithName =%s",callsign.c_str());
} catch (...) {
char text[10U];
::sprintf(text, "%u", id);
callsign = std::string(text);
}
m_mutex.unlock();
return callsign;
}
std::string CDMRLookup::find(unsigned int id)
{
std::string callsign;
std::string b;
if (id == 0xFFFFFFU)
return std::string("ALL");
m_mutex.lock();
try {
b = m_table.at(id);
size_t n = b.find(" ");
if (n > 0) {
callsign = b.substr(0,n);
} else {
LogDebug("b=%s",b.c_str());
callsign = b;
}
} catch (...) {
char text[10U];
::sprintf(text, "%u", id);
callsign = std::string(text);
}
m_mutex.unlock();
return callsign;
}
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bool CDMRLookup::exists(unsigned int id)
{
m_mutex.lock();
bool found = m_table.count(id) == 1U;
m_mutex.unlock();
return found;
}
bool CDMRLookup::load()
{
FILE* fp = ::fopen(m_filename.c_str(), "rt");
if (fp == NULL) {
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LogWarning("Cannot open the DMR 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, " \r\n"); // tokenize to eol to capture name as well
if (p1 != NULL && p2 != NULL) {
unsigned int id = (unsigned int)::atoi(p1);
for (char* p = p2; *p != 0x00U; p++) {
if(*p == 0x09U)
*p = 0x20U;
else
*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;
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LogInfo("Loaded %u Ids to the DMR callsign lookup table", size);
return true;
}