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/*=====================================================================

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QGroundControl Open Source Ground Control Station
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(c) 2009 - 2011 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
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This file is part of the QGROUNDCONTROL project
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    QGROUNDCONTROL is free software: you can redistribute it and/or modify
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    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

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    QGROUNDCONTROL is distributed in the hope that it will be useful,
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    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
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    along with QGROUNDCONTROL. If not, see <http://www.gnu.org/licenses/>.
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======================================================================*/

/**
 * @file
 *   @brief Main executable
 *   @author Lorenz Meier <mavteam@student.ethz.ch>
 *
 */

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#include <QApplication>
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#include <QSslSocket>

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#include "QGCCore.h"
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#include "MainWindow.h"
#include "configuration.h"
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#include "SerialLink.h"
#include "TCPLink.h"
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#ifdef QT_DEBUG
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#include "AutoTest.h"
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#include "CmdLineOptParser.h"
#ifdef Q_OS_WIN
#include <crtdbg.h>
#endif
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#endif
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/* SDL does ugly things to main() */
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#ifdef main
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#undef main
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#endif
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#ifdef Q_OS_WIN
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/// @brief Message handler which is installed using qInstallMsgHandler so you do not need
/// the MSFT debug tools installed to see qDebug(), qWarning(), qCritical and qAbort
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void msgHandler(QtMsgType type, const QMessageLogContext &context, const QString &msg)
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{
    const char symbols[] = { 'I', 'E', '!', 'X' };
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    QString output = QString("[%1] at %2:%3 - \"%4\"").arg(symbols[type]).arg(context.file).arg(context.line).arg(msg);
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    std::cerr << output.toStdString() << std::endl;
    if( type == QtFatalMsg ) abort();
}

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/// @brief CRT Report Hook installed using _CrtSetReportHook. We install this hook when
/// we don't want asserts to pop a dialog on windows.
int WindowsCrtReportHook(int reportType, char* message, int* returnValue)
{
    Q_UNUSED(reportType);
    
    std::cerr << message << std::endl;  // Output message to stderr
    *returnValue = 0;                   // Don't break into debugger
    return true;                        // We handled this fully ourselves
}

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#endif

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/**
 * @brief Starts the application
 *
 * @param argc Number of commandline arguments
 * @param argv Commandline arguments
 * @return exit code, 0 for normal exit and !=0 for error cases
 */
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int main(int argc, char *argv[])
{
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#ifdef Q_OS_MAC
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    // Prevent Apple's app nap from screwing us over
    // tip: the domain can be cross-checked on the command line with <defaults domains>
    QProcess::execute("defaults write org.qgroundcontrol.qgroundcontrol NSAppSleepDisabled -bool YES");
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#endif
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    // install the message handler
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#ifdef Q_OS_WIN
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    qInstallMessageHandler(msgHandler);
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#endif
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    // The following calls to qRegisterMetaType are done to silence debug output which warns
    // that we use these types in signals, and without calling qRegisterMetaType we can't queue
    // these signals. In general we don't queue these signals, but we do what the warning says
    // anyway to silence the debug output.
    qRegisterMetaType<QSerialPort::SerialPortError>();
    qRegisterMetaType<QAbstractSocket::SocketError>();
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#ifdef QT_DEBUG
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    // We parse a small set of command line options here prior to QGCCore in order to handle the ones
    // which need to be handled before a QApplication object is started.
    
    bool runUnitTests = false;          // Run unit test
    bool quietWindowsAsserts = false;   // Don't let asserts pop dialog boxes
    
    CmdLineOpt_t rgCmdLineOptions[] = {
        { "--unittest",             &runUnitTests },
        { "--no-windows-assert-ui", &quietWindowsAsserts },
        // Add additional command line option flags here
    };
    
    ParseCmdLineOptions(argc, argv, rgCmdLineOptions, sizeof(rgCmdLineOptions)/sizeof(rgCmdLineOptions[0]), true);
    
    if (quietWindowsAsserts) {
#ifdef Q_OS_WIN
        _CrtSetReportHook(WindowsCrtReportHook);
#endif
    }
    
    if (runUnitTests) {
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        // Run the test
        int failures = AutoTest::run(argc-1, argv);
        if (failures == 0)
        {
            qDebug() << "ALL TESTS PASSED";
        }
        else
        {
            qDebug() << failures << " TESTS FAILED!";
        }
        return failures;
    }
#endif
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    QGCCore* core = NULL;
    int val;
    bool firstStart = true;

    do {
        if (core) {
            delete core;
            firstStart = false;
        }
        core = new QGCCore(firstStart, argc, argv);
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        if (!QSslSocket::supportsSsl()) {
            QMessageBox::critical(NULL,
                                  QObject::tr("Missing SSL Support"),
                                  QObject::tr("QGroundControl requires support for SSL to be installed prior to running. Please see http://www.qgroundcontrol.org/downloads for instructions on installing prerequisites for QGroundControl."));
            return 1;
        }
        
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        val = core->exec();
    } while (core->getRestartRequested());

    return val;
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}