1 files changed, 177 insertions, 0 deletions
diff --git a/src/common/command_line.h b/src/common/command_line.h
new file mode 100644
index 000000000..860653772
--- /dev/null
+++ b/src/common/command_line.h
@@ -0,0 +1,177 @@
+// Copyright (c) 2012-2013 The Cryptonote developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#pragma once
+
+#include <iostream>
+#include <type_traits>
+
+#include <boost/program_options/parsers.hpp>
+#include <boost/program_options/options_description.hpp>
+#include <boost/program_options/variables_map.hpp>
+#include "include_base_utils.h"
+
+namespace command_line
+{
+  template<typename T, bool required = false>
+  struct arg_descriptor;
+
+  template<typename T>
+  struct arg_descriptor<T, false>
+  {
+    typedef T value_type;
+
+    const char* name;
+    const char* description;
+    T default_value;
+    bool not_use_default;
+  };
+
+  template<typename T>
+  struct arg_descriptor<std::vector<T>, false>
+  {
+    typedef std::vector<T> value_type;
+
+    const char* name;
+    const char* description;
+  };
+
+  template<typename T>
+  struct arg_descriptor<T, true>
+  {
+    static_assert(!std::is_same<T, bool>::value, "Boolean switch can't be required");
+
+    typedef T value_type;
+
+    const char* name;
+    const char* description;
+  };
+
+  template<typename T>
+  boost::program_options::typed_value<T, char>* make_semantic(const arg_descriptor<T, true>& /*arg*/)
+  {
+    return boost::program_options::value<T>()->required();
+  }
+
+  template<typename T>
+  boost::program_options::typed_value<T, char>* make_semantic(const arg_descriptor<T, false>& arg)
+  {
+    auto semantic = boost::program_options::value<T>();
+    if (!arg.not_use_default)
+      semantic->default_value(arg.default_value);
+    return semantic;
+  }
+
+  template<typename T>
+  boost::program_options::typed_value<T, char>* make_semantic(const arg_descriptor<T, false>& arg, const T& def)
+  {
+    auto semantic = boost::program_options::value<T>();
+    if (!arg.not_use_default)
+      semantic->default_value(def);
+    return semantic;
+  }
+
+  template<typename T>
+  boost::program_options::typed_value<std::vector<T>, char>* make_semantic(const arg_descriptor<std::vector<T>, false>& /*arg*/)
+  {
+    auto semantic = boost::program_options::value< std::vector<T> >();
+    semantic->default_value(std::vector<T>(), "");
+    return semantic;
+  }
+
+  template<typename T, bool required>
+  void add_arg(boost::program_options::options_description& description, const arg_descriptor<T, required>& arg, bool unique = true)
+  {
+    if (0 != description.find_nothrow(arg.name, false))
+    {
+      CHECK_AND_ASSERT_MES(!unique, void(), "Argument already exists: " << arg.name);
+      return;
+    }
+
+    description.add_options()(arg.name, make_semantic(arg), arg.description);
+  }
+
+  template<typename T>
+  void add_arg(boost::program_options::options_description& description, const arg_descriptor<T, false>& arg, const T& def, bool unique = true)
+  {
+    if (0 != description.find_nothrow(arg.name, false))
+    {
+      CHECK_AND_ASSERT_MES(!unique, void(), "Argument already exists: " << arg.name);
+      return;
+    }
+
+    description.add_options()(arg.name, make_semantic(arg, def), arg.description);
+  }
+
+  template<>
+  inline void add_arg(boost::program_options::options_description& description, const arg_descriptor<bool, false>& arg, bool unique)
+  {
+    if (0 != description.find_nothrow(arg.name, false))
+    {
+      CHECK_AND_ASSERT_MES(!unique, void(), "Argument already exists: " << arg.name);
+      return;
+    }
+
+    description.add_options()(arg.name, boost::program_options::bool_switch(), arg.description);
+  }
+
+  template<typename charT>
+  boost::program_options::basic_parsed_options<charT> parse_command_line(int argc, const charT* const argv[],
+    const boost::program_options::options_description& desc, bool allow_unregistered = false)
+  {
+    auto parser = boost::program_options::command_line_parser(argc, argv);
+    parser.options(desc);
+    if (allow_unregistered)
+    {
+      parser.allow_unregistered();
+    }
+    return parser.run();
+  }
+
+  template<typename F>
+  bool handle_error_helper(const boost::program_options::options_description& desc, F parser)
+  {
+    try
+    {
+      return parser();
+    }
+    catch (std::exception& e)
+    {
+      std::cerr << "Failed to parse arguments: " << e.what() << std::endl;
+      std::cerr << desc << std::endl;
+      return false;
+    }
+    catch (...)
+    {
+      std::cerr << "Failed to parse arguments: unknown exception" << std::endl;
+      std::cerr << desc << std::endl;
+      return false;
+    }
+  }
+
+  template<typename T, bool required>
+  bool has_arg(const boost::program_options::variables_map& vm, const arg_descriptor<T, required>& arg)
+  {
+    auto value = vm[arg.name];
+    return !value.empty();
+  }
+
+
+  template<typename T, bool required>
+  T get_arg(const boost::program_options::variables_map& vm, const arg_descriptor<T, required>& arg)
+  {
+    return vm[arg.name].template as<T>();
+  }
+ 
+  template<>
+  inline bool has_arg<bool, false>(const boost::program_options::variables_map& vm, const arg_descriptor<bool, false>& arg)
+  {
+    return get_arg<bool, false>(vm, arg);
+  }
+
+
+  extern const arg_descriptor<bool> arg_help;
+  extern const arg_descriptor<bool> arg_version;
+  extern const arg_descriptor<std::string> arg_data_dir;
+}