1 files changed, 144 insertions, 0 deletions

diff --git a/src/WorldStorage/WSSCompact.h b/src/WorldStorage/WSSCompact.h
new file mode 100644
index 000000000..e6a013eaf
--- /dev/null
+++ b/src/WorldStorage/WSSCompact.h
@@ -0,0 +1,144 @@
+
+// WSSCompact.h
+
+// Interfaces to the cWSSCompact class representing the "Compact" storage schema (PAK-files)
+
+
+
+
+
+#pragma once
+#ifndef WSSCOMPACT_H_INCLUDED
+#define WSSCOMPACT_H_INCLUDED
+
+#include "WorldStorage.h"
+#include "../Vector3i.h"
+
+
+
+
+
+/// Helper class for serializing a chunk into Json
+class cJsonChunkSerializer :
+	public cChunkDataCollector
+{
+public:
+
+	cJsonChunkSerializer(void);
+	
+	Json::Value & GetRoot     (void) {return m_Root; }
+	BLOCKTYPE *   GetBlockData(void) {return (BLOCKTYPE *)m_BlockData; }
+	bool          HasJsonData (void) const {return m_HasJsonData; }
+	
+protected:
+	
+	// NOTE: block data is serialized into inherited cChunkDataCollector's m_BlockData[] array
+	
+	// Entities and BlockEntities are serialized to Json
+	Json::Value m_Root;
+	bool m_HasJsonData;
+	
+	// cChunkDataCollector overrides:
+	virtual void Entity       (cEntity *      a_Entity) override;
+	virtual void BlockEntity  (cBlockEntity * a_Entity) override;
+	virtual bool LightIsValid (bool a_IsLightValid) override;
+} ;
+
+
+
+
+
+class cWSSCompact :
+	public cWSSchema
+{
+public:
+	cWSSCompact(cWorld * a_World) : cWSSchema(a_World) {}
+	virtual ~cWSSCompact();
+	
+protected:
+
+	struct sChunkHeader;
+	typedef std::vector<sChunkHeader *> sChunkHeaders;
+	
+	/// Implements a cache for a single PAK file; implements lazy-write in order to be able to write multiple chunks fast
+	class cPAKFile
+	{
+	public:
+	
+		cPAKFile(const AString & a_FileName, int a_LayerX, int a_LayerZ);
+		~cPAKFile();
+
+		bool GetChunkData(const cChunkCoords & a_Chunk, int & a_UncompressedSize, AString & a_Data);
+		bool SetChunkData(const cChunkCoords & a_Chunk, int a_UncompressedSize, const AString & a_Data);
+		bool EraseChunkData(const cChunkCoords & a_Chunk);
+		
+		bool SaveChunk(const cChunkCoords & a_Chunk, cWorld * a_World);
+		
+		int GetLayerX(void) const {return m_LayerX; }
+		int GetLayerZ(void) const {return m_LayerZ; }
+		
+		static const int PAK_VERSION = 1;
+#if AXIS_ORDER == AXIS_ORDER_XZY
+		static const int CHUNK_VERSION = 3;
+#elif AXIS_ORDER == AXIS_ORDER_YZX
+		static const int CHUNK_VERSION = 2;
+#endif
+	protected:
+	
+		AString m_FileName;
+		int     m_LayerX;
+		int     m_LayerZ;
+		
+		sChunkHeaders m_ChunkHeaders;
+		AString       m_DataContents;  // Data contents of the file, cached
+		
+		int           m_NumDirty;  // Number of chunks that were written into m_DataContents but not into the file
+
+		Vector3i      m_ChunkSize; // Is related to m_ChunkVersion
+		char          m_ChunkVersion;
+		char          m_PakVersion;
+		
+		bool SaveChunkToData(const cChunkCoords & a_Chunk, cWorld * a_World);  // Saves the chunk to m_DataContents, updates headers and m_NumDirty
+		void SynchronizeFile(void);  // Writes m_DataContents along with the headers to file, resets m_NumDirty
+
+		void UpdateChunk1To2(void); // Height from 128 to 256
+		void UpdateChunk2To3(void); // Axis order from YZX to XZY
+	} ;
+	
+	typedef std::list<cPAKFile *> cPAKFiles;
+	
+	cCriticalSection m_CS;
+	cPAKFiles m_PAKFiles;  // A MRU cache of PAK files
+	
+	/// Loads the correct PAK file either from cache or from disk, manages the m_PAKFiles cache
+	cPAKFile * LoadPAKFile(const cChunkCoords & a_Chunk);
+	
+	/// Gets chunk data from the correct file; locks CS as needed
+	bool GetChunkData(const cChunkCoords & a_Chunk, int & a_UncompressedSize, AString & a_Data);
+	
+	/// Sets chunk data to the correct file; locks CS as needed
+	bool SetChunkData(const cChunkCoords & a_Chunk, int a_UncompressedSize, const AString & a_Data);
+	
+	/// Erases chunk data from the correct file; locks CS as needed
+	bool EraseChunkData(const cChunkCoords & a_Chunk);
+	
+	/// Loads the chunk from the data (no locking needed)
+	bool LoadChunkFromData(const cChunkCoords & a_Chunk, int & a_UncompressedSize, const AString & a_Data, cWorld * a_World);
+		
+	void LoadEntitiesFromJson(Json::Value & a_Value, cEntityList & a_Entities, cBlockEntityList & a_BlockEntities, cWorld * a_World);
+
+	// cWSSchema overrides:
+	virtual bool LoadChunk(const cChunkCoords & a_Chunk) override;
+	virtual bool SaveChunk(const cChunkCoords & a_Chunk) override;
+	virtual const AString GetName(void) const override {return "compact"; }
+} ;
+
+
+
+
+
+#endif  // WSSCOMPACT_H_INCLUDED
+
+
+
+