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cuberite-2a/source/cChunkMap.cpp

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#include "Globals.h" // NOTE: MSVC stupidness requires this to be the same across all modules
#include "cChunkMap.h"
#include "cChunk.h"
#include "cWorld.h"
#include "cRoot.h"
#include "cMakeDir.h"
#include <math.h> // floorf
#ifndef _WIN32
#include <cstring> // memcpy
#include <cstdlib> // abs
#include <memory> // auto_ptr
#endif
#include "zlib.h"
#include <json/json.h>
#define USE_MEMCPY
#define LAYER_SIZE (32)
////////////////////////////////////////////////////////////////////////////////
// cChunkMap::cChunkLayer:
cChunkMap::cChunkData* cChunkMap::cChunkLayer::GetChunk( int a_X, int a_Z )
{
const int LocalX = a_X - m_X * LAYER_SIZE;
const int LocalZ = a_Z - m_Z * LAYER_SIZE;
//LOG("LocalX:%i LocalZ:%i", LocalX, LocalZ );
if ((LocalX < LAYER_SIZE) && (LocalZ < LAYER_SIZE) && (LocalX > -1) && (LocalZ > -1))
{
return &m_Chunks[ LocalX + LocalZ * LAYER_SIZE ];
}
return 0;
}
////////////////////////////////////////////////////////////////////////////////
// cChunkMap:
cChunkMap::cChunkMap(cWorld* a_World )
: m_Layers( 0 )
, m_NumLayers( 0 )
, m_World( a_World )
{
}
cChunkMap::~cChunkMap()
{
}
bool cChunkMap::RemoveLayer( cChunkLayer* a_Layer )
{
cChunkLayer* NewLayers = 0;
if( m_NumLayers > 1 )
NewLayers = new cChunkLayer[m_NumLayers-1];
int idx = 0;
bool bExcludedLayer = false;
for( int i = 0; i < m_NumLayers; ++i )
{
if( &m_Layers[i] != a_Layer )
{
if( idx < m_NumLayers-1 )
{
NewLayers[ idx ] = m_Layers[i];
idx++;
}
}
else
bExcludedLayer = true;
}
if( !bExcludedLayer )
{
LOGWARN("Could not remove layer, because layer was not found %i %i", a_Layer->m_X, a_Layer->m_Z);
delete [] NewLayers;
return false;
}
if( m_Layers ) delete [] m_Layers;
m_Layers = NewLayers;
m_NumLayers--;
return true;
}
cChunkMap::cChunkLayer* cChunkMap::AddLayer( const cChunkLayer & a_Layer )
{
cChunkLayer* TempLayers = new cChunkLayer[m_NumLayers+1];
if( m_NumLayers > 0 )
{
memcpy( TempLayers, m_Layers, sizeof( cChunkLayer ) * m_NumLayers );
delete [] m_Layers;
}
m_Layers = TempLayers;
m_Layers[m_NumLayers] = a_Layer;
cChunkLayer* NewLayer = &m_Layers[m_NumLayers];
m_NumLayers++;
return NewLayer;
}
void cChunkMap::AddChunk( cChunk* a_Chunk )
{
/* // OLD
m_Nodes[ MakeHash( a_Chunk->GetPosX(), a_Chunk->GetPosZ() ) ].push_back( a_Chunk );
*/
// NEW
const int LayerX = (int)(floorf((float)a_Chunk->GetPosX() / (float)(LAYER_SIZE)));
const int LayerZ = (int)(floorf((float)a_Chunk->GetPosZ() / (float)(LAYER_SIZE)));
cChunkLayer* FoundLayer = GetLayer( LayerX, LayerZ );
if( !FoundLayer )
{
cChunkLayer NewLayer( LAYER_SIZE*LAYER_SIZE );
NewLayer.m_X = LayerX;
NewLayer.m_Z = LayerZ;
FoundLayer = AddLayer( NewLayer );
LOGWARN("Created new layer %i %i (total layers %i)", LayerX, LayerZ, m_NumLayers );
}
//Get local coordinates in layer
const int LocalX = a_Chunk->GetPosX() - LayerX * LAYER_SIZE;
const int LocalZ = a_Chunk->GetPosZ() - LayerZ * LAYER_SIZE;
if( FoundLayer->m_Chunks[ LocalX + LocalZ * LAYER_SIZE ].m_LiveChunk )
LOGWARN("WARNING: Added chunk to layer while it was already loaded!");
if( FoundLayer->m_Chunks[ LocalX + LocalZ * LAYER_SIZE ].m_Compressed )
LOGWARN("WARNING: Added chunk to layer while a compressed version exists!");
FoundLayer->m_Chunks[ LocalX + LocalZ * LAYER_SIZE ].m_LiveChunk = a_Chunk;
FoundLayer->m_NumChunksLoaded++;
}
void cChunkMap::RemoveChunk( cChunk* a_Chunk )
{
/* // OLD
m_Nodes[ MakeHash( a_Chunk->GetPosX(), a_Chunk->GetPosZ() ) ].erase( a_Chunk );
*/
// NEW
cChunkLayer* Layer = GetLayerForChunk( a_Chunk->GetPosX(), a_Chunk->GetPosZ() );
if( Layer )
{
cChunkData* Data = Layer->GetChunk( a_Chunk->GetPosX(), a_Chunk->GetPosZ() );
if( Data->m_LiveChunk )
{
CompressChunk( Data );
Data->m_LiveChunk = 0; // Set live chunk to 0
}
Layer->m_NumChunksLoaded--;
}
}
void cChunkMap::CompressChunk( cChunkData* a_ChunkData )
{
if( a_ChunkData->m_LiveChunk )
{
// Delete already present compressed data
if( a_ChunkData->m_Compressed ) delete [] a_ChunkData->m_Compressed;
// Get Json data
Json::Value root;
std::string JsonData = "";
a_ChunkData->m_LiveChunk->SaveToJson( root );
if( !root.empty() )
{
Json::StyledWriter writer; // TODO FIXME: change to FastWriter ? :D
JsonData = writer.write( root );
}
unsigned int TotalSize = cChunk::c_BlockDataSize + JsonData.size();
uLongf CompressedSize = compressBound( TotalSize );
a_ChunkData->m_Compressed = new char[CompressedSize];
char* DataSource = a_ChunkData->m_LiveChunk->pGetBlockData();
if( JsonData.size() > 0 )
{
// Move stuff around, so data is aligned in memory
DataSource = new char[TotalSize];
memcpy( DataSource, a_ChunkData->m_LiveChunk->pGetBlockData(), cChunk::c_BlockDataSize );
memcpy( DataSource + cChunk::c_BlockDataSize, JsonData.c_str(), JsonData.size() );
}
int errorcode = compress2( (Bytef*)a_ChunkData->m_Compressed, &CompressedSize, (const Bytef*)DataSource, TotalSize, Z_DEFAULT_COMPRESSION);
if( errorcode != Z_OK )
{
LOGERROR("Error compressing data (%i)", errorcode );
}
a_ChunkData->m_CompressedSize = CompressedSize;
a_ChunkData->m_UncompressedSize = TotalSize;
if( DataSource != a_ChunkData->m_LiveChunk->pGetBlockData() )
delete [] DataSource;
}
}
cChunkMap::cChunkLayer* cChunkMap::GetLayerForChunk( int a_ChunkX, int a_ChunkZ )
{
const int LayerX = (int)(floorf((float)a_ChunkX / (float)(LAYER_SIZE)));
const int LayerZ = (int)(floorf((float)a_ChunkZ / (float)(LAYER_SIZE)));
return GetLayer( LayerX, LayerZ );
}
cChunkMap::cChunkLayer* cChunkMap::GetLayer( int a_LayerX, int a_LayerZ )
{
// Find layer in memory
for( int i = 0; i < m_NumLayers; ++i )
{
if( m_Layers[i].m_X == a_LayerX && m_Layers[i].m_Z == a_LayerZ )
{
return &m_Layers[i];
}
}
// Find layer on disk
cChunkLayer* Layer = LoadLayer( a_LayerX, a_LayerZ );
if( !Layer ) return 0;
cChunkLayer* NewLayer = AddLayer( *Layer );
delete Layer;
return NewLayer;
}
cChunk* cChunkMap::GetChunk( int a_X, int a_Y, int a_Z )
{
cChunkLayer* Layer = GetLayerForChunk( a_X, a_Z );
if (Layer == NULL)
{
return NULL;
}
cChunkData* Data = Layer->GetChunk( a_X, a_Z );
if (Data->m_LiveChunk != NULL)
{
// Already loaded and alive
return Data->m_LiveChunk;
}
// Do we at least have the compressed chunk?
if (Data->m_Compressed == NULL)
{
return NULL;
}
// The chunk has been cached (loaded from file, but not decompressed):
uLongf DestSize = Data->m_UncompressedSize;
char* BlockData = new char[ DestSize ];
int errorcode = uncompress( (Bytef*)BlockData, &DestSize, (Bytef*)Data->m_Compressed, Data->m_CompressedSize );
if( Data->m_UncompressedSize != DestSize )
{
LOGWARN("Lulwtf, expected uncompressed size differs!");
delete [] BlockData;
}
else if( errorcode != Z_OK )
{
LOGERROR("ERROR: Decompressing chunk data! %i", errorcode );
switch( errorcode )
{
case Z_MEM_ERROR:
LOGERROR("Not enough memory");
break;
case Z_BUF_ERROR:
LOGERROR("Not enough room in output buffer");
break;
case Z_DATA_ERROR:
LOGERROR("Input data corrupted or incomplete");
break;
default:
break;
};
delete [] BlockData;
}
else
{
cChunk* Chunk = new cChunk(a_X, a_Y, a_Z, m_World);
memcpy( Chunk->m_BlockData, BlockData, cChunk::c_BlockDataSize );
Chunk->CalculateHeightmap();
Data->m_LiveChunk = Chunk;
Layer->m_NumChunksLoaded++;
if( DestSize > cChunk::c_BlockDataSize ) // We gots some extra data :D
{
LOGINFO("Parsing trailing JSON");
Json::Value root; // will contains the root value after parsing.
Json::Reader reader;
if( !reader.parse( BlockData + cChunk::c_BlockDataSize, root, false ) )
{
LOGERROR("Failed to parse trailing JSON!");
}
else
{
Chunk->LoadFromJson( root );
}
}
delete [] BlockData;
delete [] Data->m_Compressed; Data->m_Compressed = 0; Data->m_CompressedSize = 0;
return Chunk;
}
return NULL;
}
void cChunkMap::Tick( float a_Dt )
{
for( int lay = 0; lay < m_NumLayers; ++lay )
{
for( int i = 0; i < LAYER_SIZE*LAYER_SIZE; ++i )
{
cChunk* Chunk = m_Layers[lay].m_Chunks[i].m_LiveChunk;
if ( Chunk != NULL)
{
Chunk->Tick( a_Dt );
}
}
} // for lay - m_Layers[]
}
void cChunkMap::UnloadUnusedChunks()
{
cWorld* World = m_World;
for( int l = 0; l < m_NumLayers; ++l )
{
cChunkLayer & Layer = m_Layers[l];
for( int i = 0; i < LAYER_SIZE*LAYER_SIZE; ++i )
{
cChunk* Chunk = Layer.m_Chunks[i].m_LiveChunk;
if( Chunk && Chunk->GetClients().size() == 0 && Chunk->GetReferenceCount() <= 0 )
{
//Chunk->SaveToDisk();
World->RemoveSpread( ptr_cChunk( Chunk ) );
RemoveChunk( Chunk );
delete Chunk;
}
}
// Unload layers
if( Layer.m_NumChunksLoaded == 0 )
{
SaveLayer( &Layer );
for( int i = 0; i < LAYER_SIZE*LAYER_SIZE; ++i ) // Free all chunk data for layer
{
if( Layer.m_Chunks[i].m_Compressed )
delete [] Layer.m_Chunks[i].m_Compressed;
if( Layer.m_Chunks[i].m_LiveChunk )
delete Layer.m_Chunks[i].m_LiveChunk;
}
if( RemoveLayer( &Layer ) ) l--;
}
else if( Layer.m_NumChunksLoaded < 0 )
{
LOGERROR("WTF! Chunks loaded in layer is %i !!", Layer.m_NumChunksLoaded );
}
}
}
bool cChunkMap::RemoveEntityFromChunk( cEntity & a_Entity, cChunk* a_CalledFrom /* = 0 */ )
{
for( int i = 0; i < m_NumLayers; ++i )
{
cChunkLayer & Layer = m_Layers[i];
for( int i = 0; i < LAYER_SIZE*LAYER_SIZE; ++i )
{
cChunk* Chunk = Layer.m_Chunks[i].m_LiveChunk;
if( Chunk != a_CalledFrom )
{
if( Chunk && Chunk->RemoveEntity( a_Entity, a_CalledFrom ) )
return true;
}
}
}
LOG("WARNING: Entity was not found in any chunk!");
return false;
}
void cChunkMap::SaveAllChunks()
{
for( int i = 0; i < m_NumLayers; ++i )
{
SaveLayer( &m_Layers[i] );
}
}
/********************************
* Saving and loading
**/
void cChunkMap::SaveLayer( cChunkLayer* a_Layer )
{
std::string WorldName = m_World->GetName();
cMakeDir::MakeDir( WorldName.c_str() );
char SourceFile[128];
sprintf_s(SourceFile, ARRAYCOUNT(SourceFile), ( WorldName + "/X%i_Z%i.pak").c_str(), a_Layer->m_X, a_Layer->m_Z );
cFile f;
if (!f.Open(SourceFile, cFile::fmWrite))
{
LOGERROR("ERROR: Could not write to file %s", SourceFile );
return;
}
//---------------
// Header
char PakVersion = 1;
char ChunkVersion = 1;
f.Write(&PakVersion, sizeof(PakVersion)); // pak version
f.Write(&ChunkVersion, sizeof(ChunkVersion)); // chunk version
// Count number of chunks in layer
short NumChunks = 0;
for( int i = 0; i < LAYER_SIZE*LAYER_SIZE; ++i )
{
if( a_Layer->m_Chunks[i].m_Compressed || a_Layer->m_Chunks[i].m_LiveChunk )
{
NumChunks++;
}
}
f.Write(&NumChunks, sizeof(NumChunks));
LOG("Num Chunks in layer [%d, %d]: %i", a_Layer->m_X, a_Layer->m_Z, NumChunks);
// Chunk headers
for (int z = 0; z < LAYER_SIZE; ++z)
{
for (int x = 0; x < LAYER_SIZE; ++x)
{
cChunkData & Data = a_Layer->m_Chunks[x + z * LAYER_SIZE];
CompressChunk(&Data);
if (Data.m_Compressed != NULL)
{
int ChunkX = a_Layer->m_X * LAYER_SIZE + x;
int ChunkZ = a_Layer->m_Z * LAYER_SIZE + z;
unsigned int Size = Data.m_CompressedSize; // Needs to be size of compressed data
unsigned int USize = Data.m_UncompressedSize; // Uncompressed size
f.Write(&ChunkX, sizeof(ChunkX));
f.Write(&ChunkZ, sizeof(ChunkZ));
f.Write(&Size, sizeof(Size));
f.Write(&USize, sizeof(USize));
}
} // for x - a_Layer->mChunks[x]
} // for z - a_Layer->m_Chunks[z]
// Chunk data
for (int i = 0; i < LAYER_SIZE*LAYER_SIZE; ++i)
{
char * Compressed = a_Layer->m_Chunks[i].m_Compressed;
if (Compressed != NULL)
{
f.Write(Compressed, a_Layer->m_Chunks[i].m_CompressedSize);
if (a_Layer->m_Chunks[i].m_LiveChunk != NULL) // If there's a live chunk we have no need for compressed data
{
delete [] a_Layer->m_Chunks[i].m_Compressed;
a_Layer->m_Chunks[i].m_Compressed = 0;
a_Layer->m_Chunks[i].m_CompressedSize = 0;
}
}
} // for i - a_Layer->m_Chunks[]
}
#define READ(File, Var) \
if (File.Read(&Var, sizeof(Var)) != sizeof(Var)) \
{ \
LOGERROR("ERROR READING %s FROM FILE %s (line %d)", #Var, SourceFile, __LINE__); \
return NULL; \
}
cChunkMap::cChunkLayer* cChunkMap::LoadLayer(int a_LayerX, int a_LayerZ )
{
std::string WorldName = m_World->GetName();
char SourceFile[128];
sprintf_s(SourceFile, ARRAYCOUNT(SourceFile), (WorldName + "/X%i_Z%i.pak").c_str(), a_LayerX, a_LayerZ );
cFile f(SourceFile, cFile::fmRead);
if (!f.IsOpen())
{
return NULL;
}
char PakVersion = 0;
char ChunkVersion = 0;
READ(f, PakVersion);
if (PakVersion != 1)
{
LOGERROR("WRONG PAK VERSION in file \"%s\"!", SourceFile);
return NULL;
}
READ(f, ChunkVersion);
if (ChunkVersion != 1 )
{
LOGERROR("WRONG CHUNK VERSION in file \"%s\"!", SourceFile);
return NULL;
}
short NumChunks = 0;
READ(f, NumChunks);
LOG("Num chunks in file \"%s\": %i", SourceFile, NumChunks);
std::auto_ptr<cChunkLayer> Layer(new cChunkLayer(LAYER_SIZE * LAYER_SIZE)); // The auto_ptr deletes the Layer if we exit with an error
Layer->m_X = a_LayerX;
Layer->m_Z = a_LayerZ;
cChunkData * OrderedData[LAYER_SIZE * LAYER_SIZE]; // So we can loop over the chunks in the order they were loaded
// Loop over all chunk headers
for( short i = 0; i < NumChunks; ++i )
{
int ChunkX = 0;
int ChunkZ = 0;
READ(f, ChunkX);
READ(f, ChunkZ);
cChunkData* Data = Layer->GetChunk( ChunkX, ChunkZ );
if (Data == NULL)
{
LOGERROR("Chunk with wrong coordinates in pak file! %i %i", ChunkX, ChunkZ );
return NULL;
}
else
{
READ(f, Data->m_CompressedSize);
READ(f, Data->m_UncompressedSize);
}
OrderedData[i] = Data;
}
// Loop over chunks again, in the order they were loaded, and load their compressed data
for( short i = 0; i < NumChunks; ++i )
{
cChunkData* Data = OrderedData[i];
Data->m_Compressed = new char[ Data->m_CompressedSize ];
if (f.Read(Data->m_Compressed, Data->m_CompressedSize) != Data->m_CompressedSize)
{
LOGERROR("ERROR 8 READING FROM FILE %s", SourceFile);
return NULL;
}
}
return Layer.release();
}
int cChunkMap::GetNumChunks()
{
int NumChunks = 0;
for( int i = 0; i < m_NumLayers; ++i )
{
NumChunks += m_Layers[i].m_NumChunksLoaded;
}
return NumChunks;
}