Function loadSave

src/OpenLoco/src/S5/S5.cpp:333–434

0x00441FC9

    // 0x00441FC9
    std::unique_ptr<S5File> loadSave(Stream& stream)
    {
        SawyerStreamReader fs(stream);
        if (!fs.validateChecksum())
        {
            throw Exception::RuntimeError("Invalid checksum");
        }

        auto file = std::make_unique<S5File>();

        // Read header
        fs.readChunk(&file->header, sizeof(file->header));

        // Read saved details 0x00442087
        if (file->header.hasFlags(HeaderFlags::hasSaveDetails))
        {
            file->saveDetails = std::make_unique<SaveDetails>();
            fs.readChunk(file->saveDetails.get(), sizeof(SaveDetails));
        }
        if (file->header.type == S5Type::scenario)
        {
            file->scenarioOptions = std::make_unique<S5::Options>();
            fs.readChunk(&*file->scenarioOptions, sizeof(S5::Options));
        }
        // Read packed objects
        if (file->header.numPackedObjects > 0)
        {
            for (auto i = 0; i < file->header.numPackedObjects; ++i)
            {
                ObjectHeader object;
                fs.read(&object, sizeof(ObjectHeader));
                auto unownedObjectData = fs.readChunk();
                std::vector<std::byte> objectData;
                objectData.resize(unownedObjectData.size());
                std::copy(std::begin(unownedObjectData), std::end(unownedObjectData), std::begin(objectData));
                file->packedObjects.push_back(std::make_pair(object, std::move(objectData)));
            }
            // 0x004420B2
        }

        if (file->header.type == S5Type::scenario)
        {
            // Load required objects
            fs.readChunk(file->requiredObjects, sizeof(file->requiredObjects));

            // Load game state up to just before companies
            fs.readChunk(&file->gameState, sizeof(file->gameState));
            // Load game state towns industry and stations
            fs.readChunk(&file->gameState.towns, sizeof(file->gameState));
            // Load the rest of gamestate after animations
            fs.readChunk(&file->gameState.animations, sizeof(file->gameState));
            file->gameState.general.fixFlags |= enumValue(S5FixFlags::fixFlag1);
            // fixState(file->gameState); this doesn't do anything as we have set fixFlag1

            if ((static_cast<GameStateFlags>(file->gameState.general.flags) & GameStateFlags::tileManagerLoaded) != GameStateFlags::none)
            {
                // Load tile elements
                auto tileElements = fs.readChunk();