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#include "Configuration.hpp"
#include <iostream>
#include <stdexcept>
#include "MpiEnvironment.hpp"
#include <boost/format.hpp>
#include <boost/program_options.hpp>
auto Configuration::parseArgs(int argc, char* argv[], const MpiEnvironment& env)
-> Configuration {
namespace po = boost::program_options;
Configuration cfg;
po::options_description desc{"Allowed options"};
desc.add_options()("help,h", "produce help message") //
("gridrows,r", po::value<std::size_t>(&cfg.Grid.Rows),
"number of rows in the grid") //
("gridcols,c", po::value<std::size_t>(&cfg.Grid.Cols),
"number of columns in the grid") //
("generations,g",
po::value<std::size_t>(&cfg.Generations)->default_value(1000),
"number of generations simulated") //
("inputfile,f", po::value<std::string>(&cfg.InputFilePath)->required(),
"path to wireworld file") //
("outputfile,o", po::value<std::string>(&cfg.OutputFilePath),
"path to output file"); //
po::positional_options_description poDesc;
poDesc.add("inputfile", 1);
po::variables_map vm;
po::store(po::command_line_parser(argc, argv)
.options(desc) //
.positional(poDesc) //
.run(),
vm);
if (vm.count("help") > 0 && env.isMaster()) { std::cout << desc << "\n"; }
po::notify(vm);
// if no dimensions given, use MPI_Dims_create
if (cfg.Grid.Cols < 1 || cfg.Grid.Rows < 1) {
std::array<int, 2> dims{static_cast<int>(cfg.Grid.Cols),
static_cast<int>(cfg.Grid.Rows)};
MPI_Dims_create(env.worldSize(), // nnodes
2, // ndims
dims.data()); // dims
cfg.Grid.Cols = dims[0];
cfg.Grid.Rows = dims[1];
const auto& totalCellCount = cfg.Grid.Cols * cfg.Grid.Rows;
const auto& worldSize = env.worldSize();
if (totalCellCount != static_cast<std::size_t>(worldSize)) {
std::cerr << boost::format("Total number of cells (%d) does not match "
"the MPI World size (%d)") %
totalCellCount % worldSize;
MPI_Abort(MPI_COMM_WORLD, EXIT_FAILURE);
}
return cfg;
}