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#include "argument_parser.hpp"
#include "conversion.hpp"
#include "interfaces/randomization.hpp"
#include <cstdlib>
#include <iostream>
#include <string_view>
namespace
{
void optarg_error(char arg, const std::string_view &error) noexcept
{
std::cout << "Error: Invalid option argument for -" << arg << ". " << error
<< std::endl;
exit(EXIT_FAILURE);
}
/**
* Returns the current optarg as a string view.
*/
auto get_str_optarg() noexcept -> std::string_view
{
return {optarg};
}
/**
* Returns the current optarg as a unsigned integer.
*
* @param arg The current command-line argument character
* @param check_zero Whether or not to make sure that the result is not zero
*/
auto get_uint_optarg(char arg, bool check_zero = false) noexcept -> uint32_t
{
auto conversion_result = str_to_uint(get_str_optarg());
if (!conversion_result.success || (check_zero && conversion_result.result == 0))
{
optarg_error(arg, conversion_result.fail_reason);
}
return conversion_result.result;
}
} // namespace
ArgumentParser::ArgumentParser(
IRandomNumberGeneratorFactory random_number_generator_factory) noexcept
: _random_number_generator_factory(random_number_generator_factory)
{
}
auto ArgumentParser::parse(
const std::vector<option> &options,
const std::string_view &short_options,
const int &argc,
char *const *argv) noexcept
-> ParsedArguments // NOLINT(cppcoreguidelines-avoid-c-arrays,
// modernize-avoid-c-arrays)
{
// NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic)
const auto args = std::vector<std::string_view>(argv, argv + argc);
const auto program_name = args[0];
ParsedArguments parsed_arguments;
char arg = 0;
while (
(arg = static_cast<char>(
getopt_long(argc, argv, short_options.data(), options.data(), nullptr))) !=
-1)
{
switch (arg)
{
case 's':
{
auto seed = get_uint_optarg(arg, true);
parsed_arguments.random_gen = _random_number_generator_factory(seed);
break;
}
case 'h':
{
std::cout << "Usage: " << program_name
<< " [OPTION]...\n\n"
"Options:\n"
<< " -s, --seed SEED The randomization seed used\n"
" -h --help Displays usage information"
<< std::endl;
exit(EXIT_SUCCESS);
}
case '?':
{
std::cout << "\nTry '" << program_name << " --help' for more information"
<< std::endl;
exit(EXIT_FAILURE);
}
default:
abort();
}
}
return parsed_arguments;
}
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