Method load

library/modules/Persistence.cpp:296–333

}

void Persistence::Internal::load(color_ostream& out) {
    CoreSuspender suspend;
    LastLoadSaveTickCountUpdater tickCountUpdater;

    clear(out);

    std::string world_name = World::ReadWorldFolder();
    std::filesystem::path save_path = getSavePath(world_name);
    std::vector<std::filesystem::path> files;
    if (0 != Filesystem::listdir(save_path, files)) {
        DEBUG(persistence,out).print("not loading state; save directory doesn't exist: '{}'\n", save_path);
        return;
    }

    bool found = false;
    for (auto & fname : files) {
        int entity_id = Persistence::WORLD_ENTITY_ID;
        if (fname != "dfhack-world.dat" && !get_entity_id(fname.string(), entity_id))
            continue;

        found = true;
        std::filesystem::path path = save_path / fname;
        if (!load_file(path, entity_id))
            out.printerr("Cannot load data from: '{}'\n", path);
    }

    if (found)
        return;

    // new file formats not found; attempt to load legacy file
    const std::filesystem::path legacy_fname = getSaveFilePath(world_name, "legacy-data");
    if (Filesystem::exists(legacy_fname)) {
        int synthesized_entity_id = Persistence::WORLD_ENTITY_ID;
        if (World::IsSiteLoaded())
            synthesized_entity_id = World::GetCurrentSiteId();
        load_file(legacy_fname, synthesized_entity_id);
    }
}

static bool is_good_entity_id(int entity_id) {
    return entity_id == Persistence::WORLD_ENTITY_ID || entity_id >= 0;