qgslogger.h

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/***************************************************************************
                         qgslogger.h  -  description
                             -------------------
    begin                : April 2006
    copyright            : (C) 2006 by Marco Hugentobler
    email                : marco.hugentobler at karto dot baug dot ethz dot ch
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef QGSLOGGER_H
#define QGSLOGGER_H

#include <iostream>
#include "qgis_sip.h"
#include <sstream>
#include <QString>
#include <QTime>

#include "qgis_core.h"
#include "qgsconfig.h"

class QFile;

#ifdef QGISDEBUG
#define QgsDebugMsg(str) QgsLogger::debug(QString(str), 1, __FILE__, __FUNCTION__, __LINE__)
#define QgsDebugMsgLevel(str, level) if ( level <= QgsLogger::debugLevel() ) { QgsLogger::debug(QString(str), (level), __FILE__, __FUNCTION__, __LINE__); }(void)(0)
#define QgsDebugCall QgsScopeLogger _qgsScopeLogger(__FILE__, __FUNCTION__, __LINE__)
#else
#define QgsDebugCall
#define QgsDebugMsg(str)
#define QgsDebugMsgLevel(str, level)
#endif

class CORE_EXPORT QgsLogger
{
  public:

    static void debug( const QString &msg, int debuglevel = 1, const char *file = nullptr, const char *function = nullptr, int line = -1 );

    static void debug( const QString &var, int val, int debuglevel = 1, const char *file = nullptr, const char *function = nullptr, int line = -1 );

    static void debug( const QString &var, double val, int debuglevel = 1, const char *file = nullptr, const char *function = nullptr, int line = -1 ) SIP_SKIP SIP_SKIP;

    template <typename T> static void debug( const QString &var, T val, const char *file = nullptr, const char *function = nullptr,
        int line = -1, int debuglevel = 1 ) SIP_SKIP SIP_SKIP
    {
      std::ostringstream os;
      os << var.toLocal8Bit().data() << " = " << val;
      debug( var, os.str().c_str(), file, function, line, debuglevel );
    }

    static void warning( const QString &msg );

    static void critical( const QString &msg );

    static void fatal( const QString &msg );

    static int debugLevel()
    {
      if ( sDebugLevel == -999 )
        init();
      return sDebugLevel;
    }

    static void logMessageToFile( const QString &message );

    static QString logFile();

  private:
    static void init();

    static int sDebugLevel;
    static int sPrefixLength;
};

class CORE_EXPORT QgsScopeLogger // clazy:exclude=rule-of-three
{
  public:
    QgsScopeLogger( const char *file, const char *func, int line )
      : _file( file )
      , _func( func )
      , _line( line )
    {
      QgsLogger::debug( QStringLiteral( "Entering." ), 2, _file, _func, _line );
    }
    ~QgsScopeLogger()
    {
      QgsLogger::debug( QStringLiteral( "Leaving." ), 2, _file, _func, _line );
    }
  private:
    const char *_file = nullptr;
    const char *_func = nullptr;
    int _line;
};

#endif