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178 lines
5.1 KiB
C
178 lines
5.1 KiB
C
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// Copyright (c) 2012-2013 The Cryptonote developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#pragma once
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#include <iostream>
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#include <type_traits>
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#include <boost/program_options/parsers.hpp>
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#include <boost/program_options/options_description.hpp>
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#include <boost/program_options/variables_map.hpp>
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#include "include_base_utils.h"
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namespace command_line
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{
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template<typename T, bool required = false>
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struct arg_descriptor;
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template<typename T>
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struct arg_descriptor<T, false>
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{
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typedef T value_type;
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const char* name;
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const char* description;
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T default_value;
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bool not_use_default;
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};
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template<typename T>
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struct arg_descriptor<std::vector<T>, false>
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{
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typedef std::vector<T> value_type;
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const char* name;
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const char* description;
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};
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template<typename T>
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struct arg_descriptor<T, true>
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{
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static_assert(!std::is_same<T, bool>::value, "Boolean switch can't be required");
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typedef T value_type;
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const char* name;
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const char* description;
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};
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template<typename T>
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boost::program_options::typed_value<T, char>* make_semantic(const arg_descriptor<T, true>& /*arg*/)
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{
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return boost::program_options::value<T>()->required();
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}
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template<typename T>
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boost::program_options::typed_value<T, char>* make_semantic(const arg_descriptor<T, false>& arg)
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{
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auto semantic = boost::program_options::value<T>();
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if (!arg.not_use_default)
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semantic->default_value(arg.default_value);
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return semantic;
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}
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template<typename T>
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boost::program_options::typed_value<T, char>* make_semantic(const arg_descriptor<T, false>& arg, const T& def)
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{
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auto semantic = boost::program_options::value<T>();
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if (!arg.not_use_default)
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semantic->default_value(def);
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return semantic;
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}
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template<typename T>
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boost::program_options::typed_value<std::vector<T>, char>* make_semantic(const arg_descriptor<std::vector<T>, false>& /*arg*/)
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{
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auto semantic = boost::program_options::value< std::vector<T> >();
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semantic->default_value(std::vector<T>(), "");
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return semantic;
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}
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template<typename T, bool required>
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void add_arg(boost::program_options::options_description& description, const arg_descriptor<T, required>& arg, bool unique = true)
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{
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if (0 != description.find_nothrow(arg.name, false))
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{
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CHECK_AND_ASSERT_MES(!unique, void(), "Argument already exists: " << arg.name);
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return;
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}
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description.add_options()(arg.name, make_semantic(arg), arg.description);
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}
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template<typename T>
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void add_arg(boost::program_options::options_description& description, const arg_descriptor<T, false>& arg, const T& def, bool unique = true)
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{
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if (0 != description.find_nothrow(arg.name, false))
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{
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CHECK_AND_ASSERT_MES(!unique, void(), "Argument already exists: " << arg.name);
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return;
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}
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description.add_options()(arg.name, make_semantic(arg, def), arg.description);
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}
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template<>
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inline void add_arg(boost::program_options::options_description& description, const arg_descriptor<bool, false>& arg, bool unique)
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{
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if (0 != description.find_nothrow(arg.name, false))
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{
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CHECK_AND_ASSERT_MES(!unique, void(), "Argument already exists: " << arg.name);
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return;
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}
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description.add_options()(arg.name, boost::program_options::bool_switch(), arg.description);
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}
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template<typename charT>
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boost::program_options::basic_parsed_options<charT> parse_command_line(int argc, const charT* const argv[],
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const boost::program_options::options_description& desc, bool allow_unregistered = false)
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{
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auto parser = boost::program_options::command_line_parser(argc, argv);
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parser.options(desc);
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if (allow_unregistered)
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{
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parser.allow_unregistered();
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}
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return parser.run();
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}
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template<typename F>
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bool handle_error_helper(const boost::program_options::options_description& desc, F parser)
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{
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try
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{
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return parser();
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}
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catch (std::exception& e)
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{
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std::cerr << "Failed to parse arguments: " << e.what() << std::endl;
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std::cerr << desc << std::endl;
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return false;
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}
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catch (...)
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{
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std::cerr << "Failed to parse arguments: unknown exception" << std::endl;
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std::cerr << desc << std::endl;
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return false;
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}
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}
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template<typename T, bool required>
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bool has_arg(const boost::program_options::variables_map& vm, const arg_descriptor<T, required>& arg)
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{
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auto value = vm[arg.name];
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return !value.empty();
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}
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template<typename T, bool required>
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T get_arg(const boost::program_options::variables_map& vm, const arg_descriptor<T, required>& arg)
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{
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return vm[arg.name].template as<T>();
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}
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template<>
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inline bool has_arg<bool, false>(const boost::program_options::variables_map& vm, const arg_descriptor<bool, false>& arg)
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{
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return get_arg<bool, false>(vm, arg);
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}
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extern const arg_descriptor<bool> arg_help;
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extern const arg_descriptor<bool> arg_version;
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extern const arg_descriptor<std::string> arg_data_dir;
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}
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