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// 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"
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);
bool LoadChunk(const cChunkCoords & a_Chunk, cWorld * a_World);
int GetLayerX(void) const {return m_LayerX; }
int GetLayerZ(void) const {return m_LayerZ; }
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
bool LoadChunk(const cChunkCoords & a_Chunk, int a_Offset, sChunkHeader * a_Header, cWorld * a_World);
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
} ;
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
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