LogStream.h

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/*--------------------------------*- VM2D -*-----------------*---------------*\
| ##  ## ##   ##  ####  #####   |                            | Version 1.14   |
| ##  ## ### ### ##  ## ##  ##  |  VM2D: Vortex Method       | 2026/03/06     |
| ##  ## ## # ##    ##  ##  ##  |  for 2D Flow Simulation    *----------------*
|  ####  ##   ##   ##   ##  ##  |  Open Source Code                           |
|   ##   ##   ## ###### #####   |  https://www.github.com/vortexmethods/VM2D  |
|                                                                             |
| Copyright (C) 2017-2026 I. Marchevsky, K. Sokol, E. Ryatina, A. Kolganova   |
*-----------------------------------------------------------------------------*
| File name: LogStream.h                                                      |
| Info: Source code of VM2D                                                   |
|                                                                             |
| This file is part of VM2D.                                                  |
| VM2D 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 3 of the License, or           |
| (at your option) any later version.                                         |
|                                                                             |
| VM2D 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 VM2D.  If not, see <http://www.gnu.org/licenses/>.               |
\*---------------------------------------------------------------------------*/
 
 
#ifndef LOGSTREAM_H
#define LOGSTREAM_H
 
#include <ostream>
#include <string>
 
namespace VMlib
{
 
    class LogStream
    {
    private:
        std::ostream* pStr;
 
        std::string label;
 
    public:
 
        LogStream()
            : pStr(nullptr), label("") {};
 
 
        void assignStream(std::ostream* pStr_, const std::string& label_)
        {
            pStr = pStr_;
            label = label_;
        }
 
 
        void inheritStream(LogStream& infoStream_, const std::string& label_)
        {
            assignStream(infoStream_.pStr, infoStream_.label + "->" + label_);
        }
 
        ~LogStream() {};
 
 
        void endl()
        {
            *pStr << std::endl;
        }
 
 
        std::ostream& operator() (char c)
        {
            if (pStr != nullptr)
            {
                switch (c)
                {
                case 'i':
                    *pStr << label << (label.length() > 0 ? " " : "") << "info: ";
                    break;
 
                case 'e':
                    *pStr << label << (label.length() > 0 ? " " : "") << "ERROR: ";
                    break;
 
                case 't':
                    *pStr << label << (label.length() > 0 ? " " : "") << "tele: ";
                    break;
 
                case '-':
                    *pStr << "  ";
                    break;
 
                case '_':
                    *pStr << "    ";
                    break;
 
                }
                return *pStr;
            }
            else
            {
                pStr = new std::ostream(NULL);
                return *pStr;
            }
        }
    };
 
}//namespace VMlib;
 
#endif