mirror of https://github.com/OpenRCT2/OpenRCT2.git
Extract IO to new class
This commit is contained in:
parent
2659441659
commit
311ce446cf
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@ -26,6 +26,7 @@
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#include <cstdint>
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#include <ctime>
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#include <fstream>
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#include <functional>
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#include <sstream>
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#include <string_view>
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#include <vector>
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@ -73,6 +74,368 @@ namespace OpenRCT2
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// clang-format on
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}; // namespace ParkFileChunkType
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class OrcaBlob
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{
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public:
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enum class Mode
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{
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READING,
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WRITING,
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};
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private:
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#pragma pack(push, 1)
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struct Header
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{
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uint32_t Magic{};
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uint32_t TargetVersion{};
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uint32_t MinVersion{};
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uint32_t NumChunks{};
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uint64_t UncompressedSize{};
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uint32_t Compression{};
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std::array<uint8_t, 20> Sha1{};
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};
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struct ChunkEntry
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{
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uint32_t Id{};
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uint64_t Offset{};
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uint64_t Length{};
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};
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#pragma pack(pop)
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std::string _path;
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Mode _mode;
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Header _header;
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std::vector<ChunkEntry> _chunks;
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std::stringstream _buffer;
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ChunkEntry _currentChunk;
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std::streampos _currentArrayStartPos;
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std::streampos _currentArrayLastPos;
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size_t _currentArrayCount;
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size_t _currentArrayElementSize;
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public:
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OrcaBlob(const std::string_view& path, Mode mode)
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{
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_path = path;
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_mode = mode;
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if (mode == Mode::READING)
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{
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std::ifstream fs(std::string(path).c_str(), std::ios::binary);
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fs.read((char*)&_header, sizeof(_header));
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_chunks.clear();
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for (uint32_t i = 0; i < _header.NumChunks; i++)
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{
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ChunkEntry entry;
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fs.read((char*)&entry, sizeof(entry));
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_chunks.push_back(entry);
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}
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_buffer = std::stringstream(std::ios::in | std::ios::out | std::ios::binary);
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_buffer.clear();
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char temp[2048];
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size_t read = 0;
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do
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{
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fs.read(temp, sizeof(temp));
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read = fs.gcount();
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_buffer.write(temp, read);
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} while (read != 0);
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}
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else
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{
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_header = {};
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_header.Magic = PARK_FILE_MAGIC;
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_header.TargetVersion = PARK_FILE_CURRENT_VERSION;
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_header.MinVersion = PARK_FILE_MIN_VERSION;
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_header.Compression = COMPRESSION_NONE;
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_buffer = std::stringstream(std::ios::out | std::ios::binary);
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}
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}
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~OrcaBlob()
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{
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if (_mode == Mode::READING)
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{
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}
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else
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{
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// TODO avoid copying the buffer
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auto uncompressedData = _buffer.str();
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_header.NumChunks = (uint32_t)_chunks.size();
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_header.UncompressedSize = _buffer.tellp();
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_header.Sha1 = Crypt::SHA1(uncompressedData.data(), uncompressedData.size());
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std::ofstream fs(_path.c_str(), std::ios::binary);
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// Write header
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fs.seekp(0);
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fs.write((const char*)&_header, sizeof(_header));
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for (const auto& chunk : _chunks)
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{
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fs.write((const char*)&chunk, sizeof(chunk));
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}
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// Write chunk data
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fs.write(uncompressedData.data(), uncompressedData.size());
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}
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}
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template<typename TFunc> bool ReadWriteChunk(uint32_t chunkId, TFunc f)
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{
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if (_mode == Mode::READING)
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{
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if (SeekChunk(chunkId))
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{
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f(*this);
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return true;
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}
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else
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{
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return false;
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}
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}
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else
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{
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_currentChunk.Id = chunkId;
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_currentChunk.Offset = _buffer.tellp();
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_currentChunk.Length = 0;
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f(*this);
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_currentChunk.Length = (uint64_t)_buffer.tellp() - _currentChunk.Offset;
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_chunks.push_back(_currentChunk);
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return true;
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}
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}
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void ReadWrite(void* addr, size_t len)
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{
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if (_mode == Mode::READING)
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{
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ReadBuffer(addr, len);
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}
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else
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{
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WriteBuffer(addr, len);
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}
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}
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template<typename T> void ReadWrite(T& v)
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{
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ReadWrite(&v, sizeof(T));
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}
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template<typename T> T Read()
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{
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if (_mode == Mode::READING)
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{
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T v;
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ReadBuffer(&v, sizeof(T));
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return v;
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}
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else
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{
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std::array<char, sizeof(T)> buffer;
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WriteBuffer(buffer.data(), buffer.size());
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return T();
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}
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}
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template<typename T> void Write(const T& v)
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{
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if (_mode == Mode::READING)
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{
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_buffer.seekg(sizeof(T));
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}
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else
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{
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ReadWrite((void*)&v, sizeof(T));
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}
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}
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template<> void ReadWrite(std::string& v)
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{
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if (_mode == Mode::READING)
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{
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v = ReadString();
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}
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else
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{
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WriteString(v);
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}
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}
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template<> void Write(const std::string_view& v)
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{
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if (_mode == Mode::READING)
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{
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ReadString();
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}
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else
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{
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WriteString(v);
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}
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}
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template<typename TArr, typename TFunc> void ReadWriteArray(TArr& arr, TFunc f)
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{
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if (_mode == Mode::READING)
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{
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auto count = BeginArray();
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arr.clear();
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for (size_t i = 0; i < count; i++)
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{
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auto &el = arr.emplace_back();
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f(el);
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NextArrayElement();
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}
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EndArray();
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}
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else
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{
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BeginArray();
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for (auto& el : arr)
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{
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f(el);
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NextArrayElement();
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}
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EndArray();
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}
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}
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private:
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void ReadBuffer(void* dst, size_t len)
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{
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_buffer.read((char*)dst, len);
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}
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void WriteBuffer(const void* buffer, size_t len)
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{
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_buffer.write((char*)buffer, len);
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}
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std::string ReadString()
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{
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std::string buffer;
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buffer.reserve(64);
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while (true)
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{
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char c;
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ReadBuffer(&c, sizeof(c));
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if (c == 0)
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{
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break;
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}
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buffer.push_back(c);
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}
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buffer.shrink_to_fit();
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return buffer;
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}
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void WriteString(const std::string_view& s)
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{
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char nullt = '\0';
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auto len = s.find('\0');
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if (len == std::string_view::npos)
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{
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len = s.size();
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}
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_buffer.write(s.data(), len);
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_buffer.write(&nullt, sizeof(nullt));
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}
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bool SeekChunk(uint32_t id)
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{
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auto result = std::find_if(_chunks.begin(), _chunks.end(), [id](const ChunkEntry& e) { return e.Id == id; });
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if (result != _chunks.end())
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{
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auto offset = result->Offset;
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_buffer.seekg(offset);
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return true;
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}
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return false;
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}
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size_t BeginArray()
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{
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if (_mode == Mode::READING)
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{
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_currentArrayCount = Read<uint32_t>();
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_currentArrayElementSize = Read<uint32_t>();
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_currentArrayLastPos = _buffer.tellg();
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return _currentArrayCount;
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}
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else
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{
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_currentArrayCount = 0;
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_currentArrayElementSize = 0;
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_currentArrayStartPos = _buffer.tellp();
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Write<uint32_t>(0);
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Write<uint32_t>(0);
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_currentArrayLastPos = _buffer.tellp();
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return 0;
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}
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}
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bool NextArrayElement()
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{
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if (_mode == Mode::READING)
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{
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if (_currentArrayCount == 0)
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{
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return false;
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}
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if (_currentArrayElementSize != 0)
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{
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_buffer.seekg((size_t)_currentArrayLastPos + _currentArrayElementSize);
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}
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_currentArrayCount--;
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return _currentArrayCount == 0;
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}
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else
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{
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auto lastElSize = (size_t)_buffer.tellp() - _currentArrayLastPos;
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if (_currentArrayCount == 0)
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{
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// Set array element size based on first element size
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_currentArrayElementSize = lastElSize;
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}
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else if (_currentArrayElementSize != lastElSize)
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{
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// Array element size was different from first element so reset it
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// to dynamic
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_currentArrayElementSize = 0;
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}
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_currentArrayCount++;
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_currentArrayLastPos = _buffer.tellp();
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return true;
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}
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}
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void EndArray()
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{
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if (_mode == Mode::READING)
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{
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}
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else
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{
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auto backupPos = _buffer.tellp();
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if ((size_t)backupPos != (size_t)_currentArrayStartPos + 8 && _currentArrayCount == 0)
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{
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throw std::runtime_error("Array data was written but no elements were added.");
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}
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_buffer.seekp(_currentArrayStartPos);
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Write((uint32_t)_currentArrayCount);
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Write((uint32_t)_currentArrayElementSize);
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_buffer.seekp(backupPos);
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}
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}
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};
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class ParkFile
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{
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public:
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@ -124,19 +487,23 @@ namespace OpenRCT2
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public:
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void Save(const std::string_view& path)
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{
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_header = {};
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_header.Magic = PARK_FILE_MAGIC;
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_header.TargetVersion = PARK_FILE_CURRENT_VERSION;
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_header.MinVersion = PARK_FILE_MIN_VERSION;
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_header.Compression = COMPRESSION_NONE;
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OrcaBlob blob(path, OrcaBlob::Mode::WRITING);
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_buffer = std::stringstream(std::ios::out | std::ios::binary);
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// Write-only for now
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blob.ReadWriteChunk(ParkFileChunkType::AUTHORING, [](OrcaBlob& b) {
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b.Write(std::string_view(gVersionInfoFull));
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std::vector<std::string> authors;
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b.ReadWriteArray(authors, [](std::string& s) { });
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b.Write(std::string_view()); // custom notes that can be attached to the save
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b.Write<uint64_t>(std::time(0)); // date started
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b.Write<uint64_t>(std::time(0)); // date modified
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});
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WriteAuthoringChunk();
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WriteObjectsChunk();
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WriteTilesChunk();
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WriteScenarioChunk();
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WriteGeneralChunk();
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WriteGeneralChunk(blob);
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WriteParkChunk();
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WriteClimateChunk();
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WriteResearch();
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@ -322,35 +689,34 @@ namespace OpenRCT2
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EndChunk();
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}
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void WriteGeneralChunk()
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void WriteGeneralChunk(OrcaBlob& blob)
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{
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BeginChunk(ParkFileChunkType::GENERAL);
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WriteValue<uint64_t>(gScenarioTicks);
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WriteValue<uint32_t>(gDateMonthTicks);
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WriteValue(gDateMonthsElapsed);
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WriteValue(gScenarioSrand0);
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WriteValue(gScenarioSrand1);
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WriteValue(gGuestInitialCash);
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WriteValue(gGuestInitialHunger);
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WriteValue(gGuestInitialThirst);
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auto found = blob.ReadWriteChunk(ParkFileChunkType::GENERAL, [](OrcaBlob& b) {
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b.ReadWrite(gScenarioTicks);
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b.ReadWrite(gDateMonthTicks);
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b.ReadWrite(gDateMonthsElapsed);
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b.ReadWrite(gScenarioSrand0);
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b.ReadWrite(gScenarioSrand1);
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b.ReadWrite(gGuestInitialCash);
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b.ReadWrite(gGuestInitialHunger);
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b.ReadWrite(gGuestInitialThirst);
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WriteValue(gNextGuestNumber);
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BeginArray();
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for (const auto& spawn : gPeepSpawns)
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b.ReadWrite(gNextGuestNumber);
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b.ReadWriteArray(gPeepSpawns, [&b](PeepSpawn& spawn) {
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b.ReadWrite(spawn.x);
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b.ReadWrite(spawn.y);
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b.ReadWrite(spawn.z);
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b.ReadWrite(spawn.direction);
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});
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b.ReadWrite(gLandPrice);
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b.ReadWrite(gConstructionRightsPrice);
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b.ReadWrite(gGrassSceneryTileLoopPosition); // TODO (this needs to be xy32)
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});
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if (!found)
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{
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WriteValue(spawn.x);
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WriteValue(spawn.y);
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WriteValue(spawn.z);
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WriteValue(spawn.direction);
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NextArrayElement();
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throw std::runtime_error("No general chunk found.");
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}
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EndArray();
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WriteValue(gLandPrice);
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WriteValue(gConstructionRightsPrice);
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WriteValue(gGrassSceneryTileLoopPosition); // TODO (this needs to be xy32)
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EndChunk();
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}
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void WriteInterfaceChunk()
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@ -14,7 +14,7 @@
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#include <algorithm>
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#include <time.h>
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uint16_t gDateMonthTicks;
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uint32_t gDateMonthTicks;
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int32_t gDateMonthsElapsed;
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// rct2: 0x00993988
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@ -68,7 +68,7 @@ bool gFirstTimeSaving = true;
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uint16_t gSavedAge;
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uint32_t gLastAutoSaveUpdate = 0;
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uint32_t gScenarioTicks;
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uint64_t gScenarioTicks;
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random_engine_t gScenarioRand;
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Objective gScenarioObjective;
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