.. _program_listing_file_lib_utilities_configuration.cpp:

Program Listing for File configuration.cpp
==========================================

|exhale_lsh| :ref:`Return to documentation for file <file_lib_utilities_configuration.cpp>` (``lib/utilities/configuration.cpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   // ---------------------------------------------------------------------
   // This file is part of falcon-core.
   //
   // Copyright (C) 2015, 2016, 2017 Neuro-Electronics Research Flanders
   //
   // Falcon-server 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.
   //
   // Falcon-server 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 falcon-core. If not, see <http://www.gnu.org/licenses/>.
   // ---------------------------------------------------------------------
   
   #include <iostream>
   #include <regex>
   #include <stdexcept>
   #include <string>
   
   #include "yaml-cpp/yaml.h"
   
   #include "configuration.hpp"
   #include "filesystem.hpp"
   
   void Configuration::load(std::string filename) {
     auto p = parse_file(filename);
   
     try {
       YAML::Node node;
       node = YAML::LoadFile(p.string());
       options_.from_yaml(node, {}, false);
       std::cout << "Default configuration loaded from " << p.string()
                 << std::endl;
     } catch (YAML::BadFile
                  &e) {  // config file does not exist, save default configuration
       try {
         // create parent path if it doesn't exist
         parse_directory(p.parent_path().string(), true, true);
         // save default config
         save(p.string());
         std::cout << "Default configuration saved to " << p.string() << "."
                   << std::endl;
       } catch (std::runtime_error &e) {
         std::cout << "Warning: could not save configuration file: " << e.what()
                   << std::endl;
       }
     }
   }
   
   void Configuration::save(std::string filename) { options_.save_yaml(filename); }