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authormadmaxoft@gmail.com <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>2012-09-23 22:22:46 +0200
committermadmaxoft@gmail.com <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>2012-09-23 22:22:46 +0200
commitf59f5f575921459668a4e955591f28e16b1dea04 (patch)
treea38e7507b98227204395aed0e9c586ec88468a0d /source/WorldStorage/WSSAnvil.h
parentSource files cleanup: Generating-related files in a separate subfolder (diff)
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diff --git a/source/WorldStorage/WSSAnvil.h b/source/WorldStorage/WSSAnvil.h
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+
+// WSSAnvil.h
+
+// Interfaces to the cWSSAnvil class representing the Anvil world storage scheme
+
+
+
+
+#pragma once
+
+#include "WorldStorage.h"
+#include "FastNBT.h"
+
+
+
+
+
+enum
+{
+ /// Maximum number of chunks in an MCA file - also the count of the header items
+ MCA_MAX_CHUNKS = 32 * 32,
+
+ /// The MCA header is 8 KiB
+ MCA_HEADER_SIZE = MCA_MAX_CHUNKS * 8,
+
+ /// There are 5 bytes of header in front of each chunk
+ MCA_CHUNK_HEADER_LENGTH = 5,
+} ;
+
+
+
+
+
+class cWSSAnvil :
+ public cWSSchema
+{
+ typedef cWSSchema super;
+
+public:
+
+ cWSSAnvil(cWorld * a_World);
+ virtual ~cWSSAnvil();
+
+protected:
+
+ class cMCAFile
+ {
+ public:
+
+ cMCAFile(const AString & a_FileName, int a_RegionX, int a_RegionZ);
+
+ bool GetChunkData (const cChunkCoords & a_Chunk, AString & a_Data);
+ bool SetChunkData (const cChunkCoords & a_Chunk, const AString & a_Data);
+ bool EraseChunkData(const cChunkCoords & a_Chunk);
+
+ int GetRegionX (void) const {return m_RegionX; }
+ int GetRegionZ (void) const {return m_RegionZ; }
+ const AString & GetFileName(void) const {return m_FileName; }
+
+ protected:
+
+ int m_RegionX;
+ int m_RegionZ;
+ cFile m_File;
+ AString m_FileName;
+
+ // The header, copied from the file so we don't have to seek to it all the time
+ // First 1024 entries are chunk locations - the 3 + 1 byte sector-offset and sector-count
+ unsigned m_Header[MCA_MAX_CHUNKS];
+
+ // Chunk timestamps, following the chunk headers, are unused by MCS
+
+ /// Finds a free location large enough to hold a_Data. Gets a hint of the chunk coords, places the data there if it fits. Returns the sector number.
+ unsigned FindFreeLocation(int a_LocalX, int a_LocalZ, const AString & a_Data);
+
+ /// Opens a MCA file either for a Read operation (fails if doesn't exist) or for a Write operation (creates new if not found)
+ bool OpenFile(bool a_IsForReading);
+ } ;
+ typedef std::list<cMCAFile *> cMCAFiles;
+
+ cCriticalSection m_CS;
+ cMCAFiles m_Files; // a MRU cache of MCA files
+
+ /// Gets chunk data from the correct file; locks file CS as needed
+ bool GetChunkData(const cChunkCoords & a_Chunk, AString & a_Data);
+
+ /// Sets chunk data into the correct file; locks file CS as needed
+ bool SetChunkData(const cChunkCoords & a_Chunk, const AString & a_Data);
+
+ /// Loads the chunk from the data (no locking needed)
+ bool LoadChunkFromData(const cChunkCoords & a_Chunk, const AString & a_Data);
+
+ /// Saves the chunk into datastream (no locking needed)
+ bool SaveChunkToData(const cChunkCoords & a_Chunk, AString & a_Data);
+
+ /// Loads the chunk from NBT data (no locking needed)
+ bool LoadChunkFromNBT(const cChunkCoords & a_Chunk, const cParsedNBT & a_NBT);
+
+ /// Saves the chunk into NBT data using a_Writer; returns true on success
+ bool SaveChunkToNBT(const cChunkCoords & a_Chunk, cFastNBTWriter & a_Writer);
+
+ /// Loads the chunk's biome map; returns a_BiomeMap if biomes present and valid, NULL otherwise
+ cChunkDef::BiomeMap * LoadBiomeMapFromNBT(cChunkDef::BiomeMap * a_BiomeMap, const cParsedNBT & a_NBT, int a_TagIdx);
+
+ /// Loads the chunk's entities from NBT data (a_Tag is the Level\\Entities list tag; may be -1)
+ void LoadEntitiesFromNBT(cEntityList & a_Entitites, const cParsedNBT & a_NBT, int a_Tag);
+
+ /// Loads the chunk's BlockEntities from NBT data (a_Tag is the Level\\TileEntities list tag; may be -1)
+ void LoadBlockEntitiesFromNBT(cBlockEntityList & a_BlockEntitites, const cParsedNBT & a_NBT, int a_Tag);
+
+ void LoadChestFromNBT (cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx);
+ void LoadFurnaceFromNBT(cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx);
+ void LoadSignFromNBT (cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx);
+ void LoadNoteFromNBT (cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx);
+
+ /// Helper function for extracting the X, Y, and Z int subtags of a NBT compound; returns true if successful
+ bool GetBlockEntityNBTPos(const cParsedNBT & a_NBT, int a_TagIdx, int & a_X, int & a_Y, int & a_Z);
+
+ /// Gets the correct MCA file either from cache or from disk, manages the m_MCAFiles cache; assumes m_CS is locked
+ cMCAFile * LoadMCAFile(const cChunkCoords & a_Chunk);
+
+ /// Copies a_Length bytes of data from the specified NBT Tag's Child into the a_Destination buffer
+ void CopyNBTData(const cParsedNBT & a_NBT, int a_Tag, const AString & a_ChildName, char * a_Destination, int a_Length);
+
+ // 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 "anvil"; }
+} ;
+
+
+
+