// options.hxx -- class to handle command line options // // Written by Curtis Olson, started April 1998. // // Copyright (C) 1998 Curtis L. Olson - http://www.flightgear.org/~curt // // 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. // // $Id$ #ifndef _OPTIONS_HXX #define _OPTIONS_HXX #include #include #include // forward decls class SGPath; namespace flightgear { class Options { private: Options(); public: static Options* sharedInstance(); ~Options(); /** * pass command line arguments, read default config files */ void init(int argc, char* argv[], const SGPath& appDataPath); /** * parse a config file (eg, .fgfsrc) */ void readConfig(const SGPath& path); /** * read the value for an option, if it has been set */ std::string valueForOption(const std::string& key, const std::string& defValue = std::string()) const; /** * return all values for a multi-valued option */ string_list valuesForOption(const std::string& key) const; /** * check if a particular option has been set (so far) */ bool isOptionSet(const std::string& key) const; /** * set an option value, assuming it is not already set (or multiple values * are permitted) * This can be used to inject option values, eg based upon environment variables */ int addOption(const std::string& key, const std::string& value); /** * apply option values to the simulation state * (set properties, etc) */ void processOptions(); /** * init the aircraft options */ void initAircraft(); private: void showUsage() const; int parseOption(const std::string& s); void processArgResult(int result); void setupRoot(); std::string platformDefaultRoot() const; class OptionsPrivate; std::auto_ptr p; }; } // of namespace flightgear #endif /* _OPTIONS_HXX */