osrm-backend/src/engine/engine_config.cpp

#include "engine/engine_config.hpp"

namespace osrm
{
namespace engine
{

bool EngineConfig::IsValid() const
{
    const bool all_path_are_empty =
        storage_config.ram_index_path.empty() && storage_config.file_index_path.empty() &&
        storage_config.hsgr_data_path.empty() && storage_config.nodes_data_path.empty() &&
        storage_config.edges_data_path.empty() && storage_config.core_data_path.empty() &&
        storage_config.geometries_path.empty() && storage_config.timestamp_path.empty() &&
        storage_config.datasource_names_path.empty() &&
        storage_config.datasource_indexes_path.empty() && storage_config.names_data_path.empty();

    const auto unlimited_or_more_than = [](const int v, const int limit) {
        return v == -1 || v > limit;
    };

    const bool limits_valid = unlimited_or_more_than(max_locations_distance_table, 2) &&
                              unlimited_or_more_than(max_locations_map_matching, 2) &&
                              unlimited_or_more_than(max_locations_trip, 2) &&
                              unlimited_or_more_than(max_locations_viaroute, 2) &&
                              unlimited_or_more_than(max_results_nearest, 0);

    return ((use_shared_memory && all_path_are_empty) || storage_config.IsValid()) && limits_valid;
}
}
}