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/**
* \file
* \author Egor Tensin <Egor.Tensin@gmail.com>
* \date 2015
* \copyright This file is licensed under the terms of the MIT License.
* See LICENSE.txt for details.
*/
#pragma once
#include "data_parsers.hpp"
#include <aesnixx/all.hpp>
#include <boost/config.hpp>
#include <boost/filesystem.hpp>
#include <boost/program_options.hpp>
#include <ostream>
#include <string>
#include <vector>
namespace
{
BOOST_NORETURN inline void throw_key_required()
{
throw boost::program_options::error(
"a key is required but not specified");
}
BOOST_NORETURN inline void throw_iv_required()
{
throw boost::program_options::error(
"initialization vector is required for the selected mode of operation");
}
BOOST_NORETURN inline void throw_src_path_required()
{
throw boost::program_options::error(
"please, specify source file path");
}
BOOST_NORETURN inline void throw_dest_path_required()
{
throw boost::program_options::error(
"please, specify destination file path");
}
class CommandLineParser
{
public:
CommandLineParser(const std::string& argv0)
: prog_name(boost::filesystem::path(argv0).filename().string())
, options("Options")
{
namespace po = boost::program_options;
options.add_options()
("help,h", "show this message and exit")
("mode,m", po::value<aesni::Mode>(&mode)->required(), "set mode of operation")
("algorithm,a", po::value<aesni::Algorithm>(&algorithm)->required(), "set algorithm");
}
void parse(int argc, char** argv)
{
namespace po = boost::program_options;
po::options_description hidden_options;
hidden_options.add_options()
("positional", po::value<std::vector<std::string>>(&args));
po::options_description all_options;
all_options.add(options).add(hidden_options);
po::positional_options_description positional_options;
positional_options.add("positional", -1);
po::variables_map vm;
po::store(po::command_line_parser(argc, argv)
.options(all_options)
.positional(positional_options)
.run(), vm);
if (vm.count("help"))
{
help_flag = true;
return;
}
po::notify(vm);
}
bool requested_help() const { return help_flag; }
aesni::Mode mode;
aesni::Algorithm algorithm;
std::vector<std::string> args;
private:
const std::string prog_name;
boost::program_options::options_description options;
bool help_flag = false;
friend std::ostream& operator<<(std::ostream&, const CommandLineParser&);
};
std::ostream& operator<<(std::ostream& os, const CommandLineParser& cmd_parser)
{
return os << "Usage: " << cmd_parser.prog_name << " [OPTIONS...] KEY [IV] SRC_PATH DEST_PATH\n"
<< cmd_parser.options << "\n";
}
}
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