// WSSCompact.cpp
// Interfaces to the cWSSCompact class representing the "compact" storage schema (PAK-files)
#include "Globals.h"
#include "WSSCompact.h"
#include "../World.h"
#include "zlib/zlib.h"
#include "json/json.h"
#include "../StringCompression.h"
#include "../BlockEntities/ChestEntity.h"
#include "../BlockEntities/DispenserEntity.h"
#include "../BlockEntities/FurnaceEntity.h"
#include "../BlockEntities/JukeboxEntity.h"
#include "../BlockEntities/NoteEntity.h"
#include "../BlockEntities/SignEntity.h"
#pragma pack(push, 1)
/// The chunk header, as stored in the file:
struct cWSSCompact::sChunkHeader
{
int m_ChunkX;
int m_ChunkZ;
int m_CompressedSize;
int m_UncompressedSize;
} ;
#pragma pack(pop)
/// The maximum number of PAK files that are cached
const int MAX_PAK_FILES = 16;
/// The maximum number of unsaved chunks before the cPAKFile saves them to disk
const int MAX_DIRTY_CHUNKS = 16;
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cJsonChunkSerializer:
cJsonChunkSerializer::cJsonChunkSerializer(void) :
m_HasJsonData(false)
{
}
void cJsonChunkSerializer::Entity(cEntity * a_Entity)
{
// TODO: a_Entity->SaveToJson(m_Root);
}
void cJsonChunkSerializer::BlockEntity(cBlockEntity * a_BlockEntity)
{
const char * SaveInto = NULL;
switch (a_BlockEntity->GetBlockType())
{
case E_BLOCK_CHEST: SaveInto = "Chests"; break;
case E_BLOCK_DISPENSER: SaveInto = "Dispensers"; break;
case E_BLOCK_DROPPER: SaveInto = "Droppers"; break;
case E_BLOCK_FURNACE: SaveInto = "Furnaces"; break;
case E_BLOCK_SIGN_POST: SaveInto = "Signs"; break;
case E_BLOCK_WALLSIGN: SaveInto = "Signs"; break;
case E_BLOCK_NOTE_BLOCK: SaveInto = "Notes"; break;
case E_BLOCK_JUKEBOX: SaveInto = "Jukeboxes"; break;
default:
{
ASSERT(!"Unhandled blocktype in BlockEntities list while saving to JSON");
break;
}
} // switch (BlockEntity->GetBlockType())
if (SaveInto == NULL)
{
return;
}
Json::Value val;
a_BlockEntity->SaveToJson(val);
m_Root[SaveInto].append(val);
m_HasJsonData = true;
}
bool cJsonChunkSerializer::LightIsValid(bool a_IsLightValid)
{
if (!a_IsLightValid)
{
return false;
}
m_Root["IsLightValid"] = true;
m_HasJsonData = true;
return true;
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cWSSCompact:
cWSSCompact::~cWSSCompact()
{
for (cPAKFiles::iterator itr = m_PAKFiles.begin(); itr != m_PAKFiles.end(); ++itr)
{
delete *itr;
}
}
bool cWSSCompact::LoadChunk(const cChunkCoords & a_Chunk)
{
AString ChunkData;
int UncompressedSize = 0;
if (!GetChunkData(a_Chunk, UncompressedSize, ChunkData))
{
// The reason for failure is already printed in GetChunkData()
return false;
}
return LoadChunkFromData(a_Chunk, UncompressedSize, ChunkData, m_World);
}
bool cWSSCompact::SaveChunk(const cChunkCoords & a_Chunk)
{
cCSLock Lock(m_CS);
cPAKFile * f = LoadPAKFile(a_Chunk);
if (f == NULL)
{
// For some reason we couldn't locate the file
LOG("Cannot locate a proper PAK file for chunk [%d, %d]", a_Chunk.m_ChunkX, a_Chunk.m_ChunkZ);
return false;
}
return f->SaveChunk(a_Chunk, m_World);
}
cWSSCompact::cPAKFile * cWSSCompact::LoadPAKFile(const cChunkCoords & a_Chunk)
{
// ASSUMES that m_CS has been locked
// We need to retain this weird conversion code, because some edge chunks are in the wrong PAK file
const int LayerX = FAST_FLOOR_DIV(a_Chunk.m_ChunkX, 32);
const int LayerZ = FAST_FLOOR_DIV(a_Chunk.m_ChunkZ, 32);
// Is it already cached?
for (cPAKFiles::iterator itr = m_PAKFiles.begin(); itr != m_PAKFiles.end(); ++itr)
{
if (((*itr) != NULL) && ((*itr)->GetLayerX() == LayerX) && ((*itr)->GetLayerZ() == LayerZ))
{
// Move the file to front and return it:
cPAKFile * f = *itr;
if (itr != m_PAKFiles.begin())
{
m_PAKFiles.erase(itr);
m_PAKFiles.push_front(f);
}
return f;
}
}
// Load it anew:
AString FileName;
Printf(FileName, "%s/X%i_Z%i.pak", m_World->GetName().c_str(), LayerX, LayerZ );
cPAKFile * f = new cPAKFile(FileName, LayerX, LayerZ);
if (f == NULL)
{
return NULL;
}
m_PAKFiles.push_front(f);
// If there are too many PAK files cached, delete the last one used:
if (m_PAKFiles.size() > MAX_PAK_FILES)
{
delete m_PAKFiles.back();
m_PAKFiles.pop_back();
}
return f;
}
bool cWSSCompact::GetChunkData(const cChunkCoords & a_Chunk, int & a_UncompressedSize, AString & a_Data)
{
cCSLock Lock(m_CS);
cPAKFile * f = LoadPAKFile(a_Chunk);
if (f == NULL)
{
return false;
}
return f->GetChunkData(a_Chunk, a_UncompressedSize, a_Data);
}
/*
// TODO: Rewrite saving to use the same principles as loading
bool cWSSCompact::SetChunkData(const cChunkCoords & a_Chunk, int a_UncompressedSize, const AString & a_Data)
{
cCSLock Lock(m_CS);
cPAKFile * f = LoadPAKFile(a_Chunk);
if (f == NULL)
{
return false;
}
return f->SetChunkData(a_Chunk, a_UncompressedSize, a_Data);
}
*/
bool cWSSCompact::EraseChunkData(const cChunkCoords & a_Chunk)
{
cCSLock Lock(m_CS);
cPAKFile * f = LoadPAKFile(a_Chunk);
if (f == NULL)
{
return false;
}
return f->EraseChunkData(a_Chunk);
}
void cWSSCompact::LoadEntitiesFromJson(Json::Value & a_Value, cEntityList & a_Entities, cBlockEntityList & a_BlockEntities, cWorld * a_World)
{
// Load chests
Json::Value AllChests = a_Value.get("Chests", Json::nullValue);
if (!AllChests.empty())
{
for (Json::Value::iterator itr = AllChests.begin(); itr != AllChests.end(); ++itr )
{
Json::Value & Chest = *itr;
cChestEntity * ChestEntity = new cChestEntity(0,0,0, a_World);
if (!ChestEntity->LoadFromJson( Chest ) )
{
LOGERROR("ERROR READING CHEST FROM JSON!" );
delete ChestEntity;
}
else
{
a_BlockEntities.push_back( ChestEntity );
}
} // for itr - AllChests[]
}
// Load dispensers
Json::Value AllDispensers = a_Value.get("Dispensers", Json::nullValue);
if( !AllDispensers.empty() )
{
for( Json::Value::iterator itr = AllDispensers.begin(); itr != AllDispensers.end(); ++itr )
{
Json::Value & Dispenser = *itr;
cDispenserEntity * DispenserEntity = new cDispenserEntity(0,0,0, a_World);
if( !DispenserEntity->LoadFromJson( Dispenser ) )
{
LOGERROR("ERROR READING DISPENSER FROM JSON!" );
delete DispenserEntity;
}
else
{
a_BlockEntities.push_back( DispenserEntity );
}
} // for itr - AllDispensers[]
}
// Load furnaces
Json::Value AllFurnaces = a_Value.get("Furnaces", Json::nullValue);
if( !AllFurnaces.empty() )
{
for( Json::Value::iterator itr = AllFurnaces.begin(); itr != AllFurnaces.end(); ++itr )
{
Json::Value & Furnace = *itr;
// TODO: The block type and meta aren't correct, there's no way to get them here
cFurnaceEntity * FurnaceEntity = new cFurnaceEntity(0, 0, 0, E_BLOCK_FURNACE, 0, a_World);
if (!FurnaceEntity->LoadFromJson(Furnace))
{
LOGERROR("ERROR READING FURNACE FROM JSON!" );
delete FurnaceEntity;
}
else
{
a_BlockEntities.push_back(FurnaceEntity);
}
} // for itr - AllFurnaces[]
}
// Load signs
Json::Value AllSigns = a_Value.get("Signs", Json::nullValue);
if( !AllSigns.empty() )
{
for( Json::Value::iterator itr = AllSigns.begin(); itr != AllSigns.end(); ++itr )
{
Json::Value & Sign = *itr;
cSignEntity * SignEntity = new cSignEntity( E_BLOCK_SIGN_POST, 0,0,0, a_World);
if ( !SignEntity->LoadFromJson( Sign ) )
{
LOGERROR("ERROR READING SIGN FROM JSON!" );
delete SignEntity;
}
else
{
a_BlockEntities.push_back( SignEntity );
}
} // for itr - AllSigns[]
}
// Load note blocks
Json::Value AllNotes = a_Value.get("Notes", Json::nullValue);
if( !AllNotes.empty() )
{
for( Json::Value::iterator itr = AllNotes.begin(); itr != AllNotes.end(); ++itr )
{
Json::Value & Note = *itr;
cNoteEntity * NoteEntity = new cNoteEntity(0, 0, 0, a_World);
if ( !NoteEntity->LoadFromJson( Note ) )
{
LOGERROR("ERROR READING NOTE BLOCK FROM JSON!" );
delete NoteEntity;
}
else
{
a_BlockEntities.push_back( NoteEntity );
}
} // for itr - AllNotes[]
}
// Load jukeboxes
Json::Value AllJukeboxes = a_Value.get("Jukeboxes", Json::nullValue);
if( !AllJukeboxes.empty() )
{
for( Json::Value::iterator itr = AllJukeboxes.begin(); itr != AllJukeboxes.end(); ++itr )
{
Json::Value & Jukebox = *itr;
cJukeboxEntity * JukeboxEntity = new cJukeboxEntity(0, 0, 0, a_World);
if ( !JukeboxEntity->LoadFromJson( Jukebox ) )
{
LOGERROR("ERROR READING JUKEBOX FROM JSON!" );
delete JukeboxEntity;
}
else
{
a_BlockEntities.push_back( JukeboxEntity );
}
} // for itr - AllJukeboxes[]
}
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cWSSCompact::cPAKFile
#define READ(Var) \
if (f.Read(&Var, sizeof(Var)) != sizeof(Var)) \
{ \
LOGERROR("ERROR READING %s FROM FILE %s (line %d); file offset %d", #Var, m_FileName.c_str(), __LINE__, f.Tell()); \
return; \
}
cWSSCompact::cPAKFile::cPAKFile(const AString & a_FileName, int a_LayerX, int a_LayerZ) :
m_FileName(a_FileName),
m_LayerX(a_LayerX),
m_LayerZ(a_LayerZ),
m_NumDirty(0),
m_ChunkVersion( CHUNK_VERSION ), // Init with latest version
m_PakVersion( PAK_VERSION )
{
cFile f;
if (!f.Open(m_FileName, cFile::fmRead))
{
return;
}
// Read headers:
READ(m_PakVersion);
if (m_PakVersion != 1)
{
LOGERROR("File \"%s\" is in an unknown pak format (%d)", m_FileName.c_str(), m_PakVersion);
return;
}
READ(m_ChunkVersion);
switch( m_ChunkVersion )
{
case 1:
m_ChunkSize.Set(16, 128, 16);
break;
case 2:
case 3:
m_ChunkSize.Set(16, 256, 16);
break;
default:
LOGERROR("File \"%s\" is in an unknown chunk format (%d)", m_FileName.c_str(), m_ChunkVersion);
return;
};
short NumChunks = 0;
READ(NumChunks);
// Read chunk headers:
for (int i = 0; i < NumChunks; i++)
{
sChunkHeader * Header = new sChunkHeader;
READ(*Header);
m_ChunkHeaders.push_back(Header);
} // for i - chunk headers
// Read chunk data:
if (f.ReadRestOfFile(m_DataContents) == -1)
{
LOGERROR("Cannot read file \"%s\" contents", m_FileName.c_str());
return;
}
if( m_ChunkVersion == 1 ) // Convert chunks to version 2
{
UpdateChunk1To2();
}
#if AXIS_ORDER == AXIS_ORDER_XZY
if( m_ChunkVersion == 2 ) // Convert chunks to version 3
{
UpdateChunk2To3();
}
#endif
}
cWSSCompact::cPAKFile::~cPAKFile()
{
if (m_NumDirty > 0)
{
SynchronizeFile();
}
for (sChunkHeaders::iterator itr = m_ChunkHeaders.begin(); itr != m_ChunkHeaders.end(); ++itr)
{
delete *itr;
}
}
bool cWSSCompact::cPAKFile::GetChunkData(const cChunkCoords & a_Chunk, int & a_UncompressedSize, AString & a_Data)
{
int ChunkX = a_Chunk.m_ChunkX;
int ChunkZ = a_Chunk.m_ChunkZ;
sChunkHeader * Header = NULL;
int Offset = 0;
for (sChunkHeaders::iterator itr = m_ChunkHeaders.begin(); itr != m_ChunkHeaders.end(); ++itr)
{
if (((*itr)->m_ChunkX == ChunkX) && ((*itr)->m_ChunkZ == ChunkZ))
{
Header = *itr;
break;
}
Offset += (*itr)->m_CompressedSize;
}
if ((Header == NULL) || (Offset + Header->m_CompressedSize > (int)m_DataContents.size()))
{
// Chunk not found / data invalid
return false;
}
a_UncompressedSize = Header->m_UncompressedSize;
a_Data.assign(m_DataContents, Offset, Header->m_CompressedSize);
return true;
}
bool cWSSCompact::cPAKFile::SaveChunk(const cChunkCoords & a_Chunk, cWorld * a_World)
{
if (!SaveChunkToData(a_Chunk, a_World))
{
return false;
}
if (m_NumDirty > MAX_DIRTY_CHUNKS)
{
SynchronizeFile();
}
return true;
}
void cWSSCompact::cPAKFile::UpdateChunk1To2()
{
int Offset = 0;
AString NewDataContents;
int ChunksConverted = 0;
for (sChunkHeaders::iterator itr = m_ChunkHeaders.begin(); itr != m_ChunkHeaders.end(); ++itr)
{
sChunkHeader * Header = *itr;
if( ChunksConverted % 32 == 0 )
{
LOGINFO("Updating \"%s\" version 1 to version 2: %d %%", m_FileName.c_str(), (ChunksConverted * 100) / m_ChunkHeaders.size() );
}
ChunksConverted++;
AString Data;
int UncompressedSize = Header->m_UncompressedSize;
Data.assign(m_DataContents, Offset, Header->m_CompressedSize);
Offset += Header->m_CompressedSize;
// Crude data integrity check:
int ExpectedSize = (16*128*16)*2 + (16*128*16)/2; // For version 1
if (UncompressedSize < ExpectedSize)
{
LOGWARNING("Chunk [%d, %d] has too short decompressed data (%d bytes out of %d needed), erasing",
Header->m_ChunkX, Header->m_ChunkZ,
UncompressedSize, ExpectedSize
);
Offset += Header->m_CompressedSize;
continue;
}
// Decompress the data:
AString UncompressedData;
{
int errorcode = UncompressString(Data.data(), Data.size(), UncompressedData, UncompressedSize);
if (errorcode != Z_OK)
{
LOGERROR("Error %d decompressing data for chunk [%d, %d]",
errorcode,
Header->m_ChunkX, Header->m_ChunkZ
);
Offset += Header->m_CompressedSize;
continue;
}
}
if (UncompressedSize != (int)UncompressedData.size())
{
LOGWARNING("Uncompressed data size differs (exp %d bytes, got %d) for chunk [%d, %d]",
UncompressedSize, UncompressedData.size(),
Header->m_ChunkX, Header->m_ChunkZ
);
Offset += Header->m_CompressedSize;
continue;
}
// Old version is 128 blocks high with YZX axis order
char ConvertedData[cChunkDef::BlockDataSize];
int Index = 0;
unsigned int InChunkOffset = 0;
for( int x = 0; x < 16; ++x ) for( int z = 0; z < 16; ++z )
{
for( int y = 0; y < 128; ++y )
{
ConvertedData[Index++] = UncompressedData[y + z * 128 + x * 128 * 16 + InChunkOffset];
}
// Add 128 empty blocks after an old y column
memset(ConvertedData + Index, E_BLOCK_AIR, 128);
Index += 128;
}
InChunkOffset += (16 * 128 * 16);
for( int x = 0; x < 16; ++x ) for( int z = 0; z < 16; ++z ) // Metadata
{
for( int y = 0; y < 64; ++y )
{
ConvertedData[Index++] = UncompressedData[y + z * 64 + x * 64 * 16 + InChunkOffset];
}
memset(ConvertedData + Index, 0, 64);
Index += 64;
}
InChunkOffset += (16 * 128 * 16) / 2;
for( int x = 0; x < 16; ++x ) for( int z = 0; z < 16; ++z ) // Block light
{
for( int y = 0; y < 64; ++y )
{
ConvertedData[Index++] = UncompressedData[y + z * 64 + x * 64 * 16 + InChunkOffset];
}
memset(ConvertedData + Index, 0, 64);
Index += 64;
}
InChunkOffset += (16*128*16)/2;
for( int x = 0; x < 16; ++x ) for( int z = 0; z < 16; ++z ) // Sky light
{
for( int y = 0; y < 64; ++y )
{
ConvertedData[Index++] = UncompressedData[y + z * 64 + x * 64 * 16 + InChunkOffset];
}
memset(ConvertedData + Index, 0, 64);
Index += 64;
}
InChunkOffset += (16 * 128 * 16) / 2;
AString Converted(ConvertedData, ARRAYCOUNT(ConvertedData));
// Add JSON data afterwards
if (UncompressedData.size() > InChunkOffset)
{
Converted.append( UncompressedData.begin() + InChunkOffset, UncompressedData.end() );
}
// Re-compress data
AString CompressedData;
{
int errorcode = CompressString(Converted.data(), Converted.size(), CompressedData);
if (errorcode != Z_OK)
{
LOGERROR("Error %d compressing data for chunk [%d, %d]",
errorcode,
Header->m_ChunkX, Header->m_ChunkZ
);
continue;
}
}
// Save into file's cache
Header->m_UncompressedSize = Converted.size();
Header->m_CompressedSize = CompressedData.size();
NewDataContents.append( CompressedData );
}
// Done converting
m_DataContents = NewDataContents;
m_ChunkVersion = 2;
SynchronizeFile();
LOGINFO("Updated \"%s\" version 1 to version 2", m_FileName.c_str() );
}
void cWSSCompact::cPAKFile::UpdateChunk2To3()
{
int Offset = 0;
AString NewDataContents;
int ChunksConverted = 0;
for (sChunkHeaders::iterator itr = m_ChunkHeaders.begin(); itr != m_ChunkHeaders.end(); ++itr)
{
sChunkHeader * Header = *itr;
if( ChunksConverted % 32 == 0 )
{
LOGINFO("Updating \"%s\" version 2 to version 3: %d %%", m_FileName.c_str(), (ChunksConverted * 100) / m_ChunkHeaders.size() );
}
ChunksConverted++;
AString Data;
int UncompressedSize = Header->m_UncompressedSize;
Data.assign(m_DataContents, Offset, Header->m_CompressedSize);
Offset += Header->m_CompressedSize;
// Crude data integrity check:
const int ExpectedSize = (16*256*16)*2 + (16*256*16)/2; // For version 2
if (UncompressedSize < ExpectedSize)
{
LOGWARNING("Chunk [%d, %d] has too short decompressed data (%d bytes out of %d needed), erasing",
Header->m_ChunkX, Header->m_ChunkZ,
UncompressedSize, ExpectedSize
);
Offset += Header->m_CompressedSize;
continue;
}
// Decompress the data:
AString UncompressedData;
{
int errorcode = UncompressString(Data.data(), Data.size(), UncompressedData, UncompressedSize);
if (errorcode != Z_OK)
{
LOGERROR("Error %d decompressing data for chunk [%d, %d]",
errorcode,
Header->m_ChunkX, Header->m_ChunkZ
);
Offset += Header->m_CompressedSize;
continue;
}
}
if (UncompressedSize != (int)UncompressedData.size())
{
LOGWARNING("Uncompressed data size differs (exp %d bytes, got %d) for chunk [%d, %d]",
UncompressedSize, UncompressedData.size(),
Header->m_ChunkX, Header->m_ChunkZ
);
Offset += Header->m_CompressedSize;
continue;
}
char ConvertedData[ExpectedSize];
memset(ConvertedData, 0, ExpectedSize);
// Cannot use cChunk::MakeIndex because it might change again?????????
// For compatibility, use what we know is current
#define MAKE_2_INDEX( x, y, z ) ( y + (z * 256) + (x * 256 * 16) )
#define MAKE_3_INDEX( x, y, z ) ( x + (z * 16) + (y * 16 * 16) )
unsigned int InChunkOffset = 0;
for( int x = 0; x < 16; ++x ) for( int z = 0; z < 16; ++z ) for( int y = 0; y < 256; ++y ) // YZX Loop order is important, in 1.1 Y was first then Z then X
{
ConvertedData[ MAKE_3_INDEX(x, y, z) ] = UncompressedData[InChunkOffset];
++InChunkOffset;
} // for y, z, x
unsigned int index2 = 0;
for( int x = 0; x < 16; ++x ) for( int z = 0; z < 16; ++z ) for( int y = 0; y < 256; ++y )
{
ConvertedData[ InChunkOffset + MAKE_3_INDEX(x, y, z)/2 ] |= ( (UncompressedData[ InChunkOffset + index2/2 ] >> ((index2&1)*4) ) & 0x0f ) << ((x&1)*4);
++index2;
}
InChunkOffset += index2 / 2;
index2 = 0;
for( int x = 0; x < 16; ++x ) for( int z = 0; z < 16; ++z ) for( int y = 0; y < 256; ++y )
{
ConvertedData[ InChunkOffset + MAKE_3_INDEX(x, y, z)/2 ] |= ( (UncompressedData[ InChunkOffset + index2/2 ] >> ((index2&1)*4) ) & 0x0f ) << ((x&1)*4);
++index2;
}
InChunkOffset += index2 / 2;
index2 = 0;
for( int x = 0; x < 16; ++x ) for( int z = 0; z < 16; ++z ) for( int y = 0; y < 256; ++y )
{
ConvertedData[ InChunkOffset + MAKE_3_INDEX(x, y, z)/2 ] |= ( (UncompressedData[ InChunkOffset + index2/2 ] >> ((index2&1)*4) ) & 0x0f ) << ((x&1)*4);
++index2;
}
InChunkOffset += index2 / 2;
index2 = 0;
AString Converted(ConvertedData, ExpectedSize);
// Add JSON data afterwards
if (UncompressedData.size() > InChunkOffset)
{
Converted.append( UncompressedData.begin() + InChunkOffset, UncompressedData.end() );
}
// Re-compress data
AString CompressedData;
{
int errorcode = CompressString(Converted.data(), Converted.size(), CompressedData);
if (errorcode != Z_OK)
{
LOGERROR("Error %d compressing data for chunk [%d, %d]",
errorcode,
Header->m_ChunkX, Header->m_ChunkZ
);
continue;
}
}
// Save into file's cache
Header->m_UncompressedSize = Converted.size();
Header->m_CompressedSize = CompressedData.size();
NewDataContents.append( CompressedData );
}
// Done converting
m_DataContents = NewDataContents;
m_ChunkVersion = 3;
SynchronizeFile();
LOGINFO("Updated \"%s\" version 2 to version 3", m_FileName.c_str() );
}
bool cWSSCompact::LoadChunkFromData(const cChunkCoords & a_Chunk, int & a_UncompressedSize, const AString & a_Data, cWorld * a_World)
{
// Crude data integrity check:
if (a_UncompressedSize < cChunkDef::BlockDataSize)
{
LOGWARNING("Chunk [%d, %d] has too short decompressed data (%d bytes out of %d needed), erasing",
a_Chunk.m_ChunkX, a_Chunk.m_ChunkZ,
a_UncompressedSize, cChunkDef::BlockDataSize
);
EraseChunkData(a_Chunk);
return false;
}
// Decompress the data:
AString UncompressedData;
int errorcode = UncompressString(a_Data.data(), a_Data.size(), UncompressedData, a_UncompressedSize);
if (errorcode != Z_OK)
{
LOGERROR("Error %d decompressing data for chunk [%d, %d]",
errorcode,
a_Chunk.m_ChunkX, a_Chunk.m_ChunkZ
);
return false;
}
if (a_UncompressedSize != (int)UncompressedData.size())
{
LOGWARNING("Uncompressed data size differs (exp %d bytes, got %d) for chunk [%d, %d]",
a_UncompressedSize, UncompressedData.size(),
a_Chunk.m_ChunkX, a_Chunk.m_ChunkZ
);
return false;
}
cEntityList Entities;
cBlockEntityList BlockEntities;
bool IsLightValid = false;
if (a_UncompressedSize > cChunkDef::BlockDataSize)
{
Json::Value root; // will contain the root value after parsing.
Json::Reader reader;
if ( !reader.parse( UncompressedData.data() + cChunkDef::BlockDataSize, root, false ) )
{
LOGERROR("Failed to parse trailing JSON in chunk [%d, %d]!",
a_Chunk.m_ChunkX, a_Chunk.m_ChunkZ
);
}
else
{
LoadEntitiesFromJson(root, Entities, BlockEntities, a_World);
IsLightValid = root.get("IsLightValid", false).asBool();
}
}
BLOCKTYPE * BlockData = (BLOCKTYPE *)UncompressedData.data();
NIBBLETYPE * MetaData = (NIBBLETYPE *)(BlockData + cChunkDef::MetaOffset);
NIBBLETYPE * BlockLight = (NIBBLETYPE *)(BlockData + cChunkDef::LightOffset);
NIBBLETYPE * SkyLight = (NIBBLETYPE *)(BlockData + cChunkDef::SkyLightOffset);
a_World->SetChunkData(
a_Chunk.m_ChunkX, a_Chunk.m_ChunkZ,
BlockData, MetaData,
IsLightValid ? BlockLight : NULL,
IsLightValid ? SkyLight : NULL,
NULL, NULL,
Entities, BlockEntities,
false
);
return true;
}
bool cWSSCompact::cPAKFile::EraseChunkData(const cChunkCoords & a_Chunk)
{
int ChunkX = a_Chunk.m_ChunkX;
int ChunkZ = a_Chunk.m_ChunkZ;
int Offset = 0;
for (sChunkHeaders::iterator itr = m_ChunkHeaders.begin(); itr != m_ChunkHeaders.end(); ++itr)
{
if (((*itr)->m_ChunkX == ChunkX) && ((*itr)->m_ChunkZ == ChunkZ))
{
m_DataContents.erase(Offset, (*itr)->m_CompressedSize);
delete *itr;
itr = m_ChunkHeaders.erase(itr);
return true;
}
Offset += (*itr)->m_CompressedSize;
}
return false;
}
bool cWSSCompact::cPAKFile::SaveChunkToData(const cChunkCoords & a_Chunk, cWorld * a_World)
{
// Serialize the chunk:
cJsonChunkSerializer Serializer;
if (!a_World->GetChunkData(a_Chunk.m_ChunkX, a_Chunk.m_ChunkZ, Serializer))
{
// Chunk not valid
LOG("cWSSCompact: Trying to save chunk [%d, %d, %d] that has no data, ignoring request.", a_Chunk.m_ChunkX, a_Chunk.m_ChunkY, a_Chunk.m_ChunkZ);
return false;
}
AString Data;
Data.assign((const char *)Serializer.GetBlockData(), cChunkDef::BlockDataSize);
if (Serializer.HasJsonData())
{
AString JsonData;
Json::StyledWriter writer;
JsonData = writer.write(Serializer.GetRoot());
Data.append(JsonData);
}
// Compress the data:
AString CompressedData;
int errorcode = CompressString(Data.data(), Data.size(), CompressedData);
if ( errorcode != Z_OK )
{
LOGERROR("Error %i compressing data for chunk [%d, %d, %d]", errorcode, a_Chunk.m_ChunkX, a_Chunk.m_ChunkY, a_Chunk.m_ChunkZ);
return false;
}
// Erase any existing data for the chunk:
EraseChunkData(a_Chunk);
// Save the header:
sChunkHeader * Header = new sChunkHeader;
if (Header == NULL)
{
LOGWARNING("Cannot create a new chunk header to save chunk [%d, %d, %d]", a_Chunk.m_ChunkX, a_Chunk.m_ChunkY, a_Chunk.m_ChunkZ);
return false;
}
Header->m_CompressedSize = (int)CompressedData.size();
Header->m_ChunkX = a_Chunk.m_ChunkX;
Header->m_ChunkZ = a_Chunk.m_ChunkZ;
Header->m_UncompressedSize = (int)Data.size();
m_ChunkHeaders.push_back(Header);
m_DataContents.append(CompressedData.data(), CompressedData.size());
m_NumDirty++;
return true;
}
#define WRITE(Var) \
if (f.Write(&Var, sizeof(Var)) != sizeof(Var)) \
{ \
LOGERROR("cWSSCompact: ERROR writing %s to file \"%s\" (line %d); file offset %d", #Var, m_FileName.c_str(), __LINE__, f.Tell()); \
return; \
}
void cWSSCompact::cPAKFile::SynchronizeFile(void)
{
cFile f;
if (!f.Open(m_FileName, cFile::fmWrite))
{
LOGERROR("Cannot open PAK file \"%s\" for writing", m_FileName.c_str());
return;
}
WRITE(m_PakVersion);
WRITE(m_ChunkVersion);
short NumChunks = (short)m_ChunkHeaders.size();
WRITE(NumChunks);
for (sChunkHeaders::iterator itr = m_ChunkHeaders.begin(); itr != m_ChunkHeaders.end(); ++itr)
{
WRITE(**itr);
}
if (f.Write(m_DataContents.data(), m_DataContents.size()) != (int)m_DataContents.size())
{
LOGERROR("cWSSCompact: ERROR writing chunk contents to file \"%s\" (line %d); file offset %d", m_FileName.c_str(), __LINE__, f.Tell());
return;
}
m_NumDirty = 0;
}
