95eb3a7bd7
BACK UP YOUR WORLD! git-svn-id: http://mc-server.googlecode.com/svn/trunk@358 0a769ca7-a7f5-676a-18bf-c427514a06d6
112 lines
3.4 KiB
C++
112 lines
3.4 KiB
C++
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// WSSCompact.h
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// Interfaces to the cWSSCompact class representing the "Compact" storage schema (PAK-files)
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#pragma once
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#ifndef WSSCOMPACT_H_INCLUDED
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#define WSSCOMPACT_H_INCLUDED
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#include "WorldStorage.h"
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#include "Vector3i.h"
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class cWSSCompact :
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public cWSSchema
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{
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public:
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cWSSCompact(cWorld * a_World) : cWSSchema(a_World) {}
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virtual ~cWSSCompact();
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protected:
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struct sChunkHeader;
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typedef std::vector<sChunkHeader *> sChunkHeaders;
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/// Implements a cache for a single PAK file; implements lazy-write in order to be able to write multiple chunks fast
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class cPAKFile
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{
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public:
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cPAKFile(const AString & a_FileName, int a_LayerX, int a_LayerZ);
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~cPAKFile();
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bool GetChunkData(const cChunkCoords & a_Chunk, int & a_UncompressedSize, AString & a_Data);
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bool SetChunkData(const cChunkCoords & a_Chunk, int a_UncompressedSize, const AString & a_Data);
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bool EraseChunkData(const cChunkCoords & a_Chunk);
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bool SaveChunk(const cChunkCoords & a_Chunk, cWorld * a_World);
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bool LoadChunk(const cChunkCoords & a_Chunk, cWorld * a_World);
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int GetLayerX(void) const {return m_LayerX; }
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int GetLayerZ(void) const {return m_LayerZ; }
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static const int PAK_VERSION = 1;
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static const int CHUNK_VERSION = 2;
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protected:
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AString m_FileName;
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int m_LayerX;
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int m_LayerZ;
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sChunkHeaders m_ChunkHeaders;
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AString m_DataContents; // Data contents of the file, cached
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int m_NumDirty; // Number of chunks that were written into m_DataContents but not into the file
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Vector3i m_ChunkSize; // Is related to m_ChunkVersion
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char m_ChunkVersion;
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char m_PakVersion;
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bool LoadChunk(const cChunkCoords & a_Chunk, int a_Offset, sChunkHeader * a_Header, cWorld * a_World);
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bool SaveChunkToData(const cChunkCoords & a_Chunk, cWorld * a_World); // Saves the chunk to m_DataContents, updates headers and m_NumDirty
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void SynchronizeFile(void); // Writes m_DataContents along with the headers to file, resets m_NumDirty
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void UpdateChunk1To2(void);
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} ;
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typedef std::list<cPAKFile *> cPAKFiles;
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cCriticalSection m_CS;
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cPAKFiles m_PAKFiles; // A MRU cache of PAK files
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/// Loads the correct PAK file either from cache or from disk, manages the m_PAKFiles cache
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cPAKFile * LoadPAKFile(const cChunkCoords & a_Chunk);
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/// Gets chunk data from the correct file; locks CS as needed
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bool GetChunkData(const cChunkCoords & a_Chunk, int & a_UncompressedSize, AString & a_Data);
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/// Sets chunk data to the correct file; locks CS as needed
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bool SetChunkData(const cChunkCoords & a_Chunk, int a_UncompressedSize, const AString & a_Data);
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/// Erases chunk data from the correct file; locks CS as needed
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bool EraseChunkData(const cChunkCoords & a_Chunk);
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/// Loads the chunk from the data (no locking needed)
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bool LoadChunkFromData(const cChunkCoords & a_Chunk, int & a_UncompressedSize, const AString & a_Data, cWorld * a_World);
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void LoadEntitiesFromJson(Json::Value & a_Value, cEntityList & a_Entities, cBlockEntityList & a_BlockEntities, cWorld * a_World);
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// cWSSchema overrides:
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virtual bool LoadChunk(const cChunkCoords & a_Chunk) override;
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virtual bool SaveChunk(const cChunkCoords & a_Chunk) override;
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virtual const AString GetName(void) const override {return "compact"; }
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} ;
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#endif // WSSCOMPACT_H_INCLUDED
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