Function readCellMetrics

include/customizer/files.hpp:17–42

// reads .osrm.cell_metrics file
template <typename CellMetricT>
inline void readCellMetrics(const std::filesystem::path &path,
                            std::unordered_map<std::string, std::vector<CellMetricT>> &metrics)
{
    static_assert(std::is_same<CellMetricView, CellMetricT>::value ||
                      std::is_same<CellMetric, CellMetricT>::value,
                  "");

    const auto fingerprint = storage::tar::FileReader::VerifyFingerprint;
    storage::tar::FileReader reader{path, fingerprint};

    for (auto &pair : metrics)
    {
        const auto &metric_name = pair.first;
        auto &metric_exclude_classes = pair.second;

        auto prefix = "/mld/metrics/" + metric_name + "/exclude";
        auto num_exclude_classes = reader.ReadElementCount64(prefix);
        metric_exclude_classes.resize(num_exclude_classes);

        auto id = 0;
        for (auto &metric : metric_exclude_classes)
        {
            serialization::read(reader, prefix + "/" + std::to_string(id++), metric);
        }
    }
}

// writes .osrm.cell_metrics file
template <typename CellMetricT>