6ccc4e3674
git-svn-id: http://mc-server.googlecode.com/svn/trunk@895 0a769ca7-a7f5-676a-18bf-c427514a06d6
408 lines
9.9 KiB
C++
408 lines
9.9 KiB
C++
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// Processor.cpp
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// Implements the cProcessor class representing the overall processor engine that manages threads, calls callbacks etc.
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#include "Globals.h"
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#include "Processor.h"
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#include "Callback.h"
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#include "../source/WorldStorage/FastNBT.h"
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#include "zlib.h"
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const int CHUNK_INFLATE_MAX = 1 MiB;
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const int MAX_COMPRESSED_CHUNK_SIZE = 1 MiB;
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// cProcessor::cThread:
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cProcessor::cThread::cThread(cCallback & a_Callback, cProcessor & a_ParentProcessor) :
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super("cProcessor::cThread"),
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m_Callback(a_Callback),
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m_ParentProcessor(a_ParentProcessor)
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{
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super::Start();
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}
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void cProcessor::cThread::Execute(void)
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{
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for (;;)
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{
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AString FileName = m_ParentProcessor.GetOneFileName();
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if (FileName.empty())
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{
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// All done, terminate the thread
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return;
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}
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ProcessFile(FileName);
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} // for-ever
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}
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void cProcessor::cThread::ProcessFile(const AString & a_FileName)
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{
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LOG("Processing file \"%s\"", a_FileName.c_str());
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size_t idx = a_FileName.rfind("r.");
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if (idx == AString::npos)
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{
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LOG("Cannot parse filename \"%s\", skipping file.", a_FileName.c_str());
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return;
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}
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int RegionX = 0, RegionZ = 0;
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if (sscanf_s(a_FileName.c_str() + idx, "r.%d.%d.mca", &RegionX, &RegionZ) != 2)
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{
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LOG("Cannot parse filename \"%s\" into coords, skipping file.", a_FileName.c_str());
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return;
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}
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cFile f;
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if (!f.Open(a_FileName, cFile::fmRead))
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{
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LOG("Cannot open file \"%s\", skipping file.", a_FileName.c_str());
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return;
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}
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int Header[2048];
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if (f.Read(Header, sizeof(Header)) != sizeof(Header))
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{
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LOG("Cannot read header in file \"%s\", skipping file.", a_FileName.c_str());
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return;
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}
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for (int i = 0; i < ARRAYCOUNT(Header); i++)
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{
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Header[i] = ntohl(Header[i]);
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}
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int ChunkBaseX = RegionX * 32;
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int ChunkBaseZ = RegionZ * 32;
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for (int i = 0; i < 1024; i++)
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{
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unsigned Location = Header[i];
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unsigned Timestamp = Header[i + 1024];
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if (
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((Location == 0) && (Timestamp == 0)) || // Official docs' "not present"
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(Location >> 8 < 2) || // Logical - no chunk can start inside the header
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((Location & 0xff) == 0) // Logical - no chunk can be zero bytes
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)
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{
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// Chunk not present in the file
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continue;
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}
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int ChunkX = ChunkBaseX + (i % 32);
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int ChunkZ = ChunkBaseZ + (i / 32);
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if (m_Callback.OnNewChunk(ChunkX, ChunkZ))
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{
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continue;
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}
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ProcessChunk(f, ChunkX, ChunkZ, Location >> 8, Location & 0xff, Timestamp);
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} // for i - chunk index
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}
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void cProcessor::cThread::ProcessChunk(cFile & a_File, int a_ChunkX, int a_ChunkZ, unsigned a_SectorStart, unsigned a_SectorSize, unsigned a_TimeStamp)
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{
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if (m_Callback.OnHeader(a_SectorStart * 4096, a_SectorSize, a_TimeStamp))
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{
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return;
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}
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if (a_File.Seek(a_SectorStart * 4096) < 0)
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{
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LOG("Seeking to sector %d failed, skipping chunk [%d, %d]", a_SectorStart, a_ChunkX, a_ChunkZ);
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return;
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}
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int ByteSize;
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if (a_File.Read(&ByteSize, sizeof(ByteSize)) != sizeof(ByteSize))
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{
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LOG("Cannot read bytesize at offset %d, skipping chunk [%d, %d].", a_SectorStart * 4096, a_ChunkX, a_ChunkZ);
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return;
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}
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ByteSize = ntohl(ByteSize);
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char CompressionMethod;
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if (a_File.Read(&CompressionMethod, sizeof(CompressionMethod)) != sizeof(CompressionMethod))
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{
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LOG("Cannot read CompressionMethod at offset %d, skipping chunk [%d, %d].", a_SectorStart * 4096 + 4, a_ChunkX, a_ChunkZ);
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return;
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}
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if (m_Callback.OnCompressedDataSizePos(ByteSize, a_SectorStart * 4096 + 5, CompressionMethod))
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{
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return;
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}
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char CompressedData[MAX_COMPRESSED_CHUNK_SIZE];
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if (a_File.Read(CompressedData, ByteSize - 1) != ByteSize - 1)
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{
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LOG("Cannot read %d bytes of compressed data at offset %d, skipping chunk [%d, %d]", ByteSize - 1, a_SectorStart * 4096 + 5, a_ChunkX, a_ChunkZ);
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return;
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}
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ProcessCompressedChunkData(a_ChunkX, a_ChunkZ, CompressedData, ByteSize);
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}
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void cProcessor::cThread::ProcessCompressedChunkData(int a_ChunkX, int a_ChunkZ, const char * a_CompressedData, int a_CompressedSize)
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{
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char Decompressed[CHUNK_INFLATE_MAX];
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z_stream strm;
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strm.zalloc = (alloc_func)NULL;
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strm.zfree = (free_func)NULL;
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strm.opaque = NULL;
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inflateInit(&strm);
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strm.next_out = (Bytef *)Decompressed;
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strm.avail_out = sizeof(Decompressed);
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strm.next_in = (Bytef *)a_CompressedData;
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strm.avail_in = a_CompressedSize;
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int res = inflate(&strm, Z_FINISH);
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inflateEnd(&strm);
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if (res != Z_STREAM_END)
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{
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LOG("Decompression failed, skipping chunk [%d, %d]", a_ChunkX, a_ChunkZ);
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return;
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}
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if (m_Callback.OnDecompressedData(Decompressed, strm.total_out))
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{
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return;
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}
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// Parse the NBT data:
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cParsedNBT NBT(Decompressed, strm.total_out);
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if (!NBT.IsValid())
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{
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LOG("NBT Parsing failed, skipping chunk [%d, %d]", a_ChunkX, a_ChunkZ);
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return;
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}
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ProcessParsedChunkData(a_ChunkX, a_ChunkZ, NBT);
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}
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void cProcessor::cThread::ProcessParsedChunkData(int a_ChunkX, int a_ChunkZ, cParsedNBT & a_NBT)
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{
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int LevelTag = a_NBT.FindChildByName(0, "Level");
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if (LevelTag < 0)
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{
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LOG("Bad logical structure of the NBT, skipping chunk [%d, %d].", a_ChunkX, a_ChunkZ);
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return;
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}
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int XPosTag = a_NBT.FindChildByName(LevelTag, "xPos");
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int ZPosTag = a_NBT.FindChildByName(LevelTag, "zPos");
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if ((XPosTag < 0) || (ZPosTag < 0))
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{
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LOG("Pos tags missing in NTB, skipping chunk [%d, %d].", a_ChunkX, a_ChunkZ);
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return;
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}
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if (m_Callback.OnRealCoords(a_NBT.GetInt(XPosTag), a_NBT.GetInt(ZPosTag)))
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{
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return;
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}
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int LastUpdateTag = a_NBT.FindChildByName(LevelTag, "LastUpdate");
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if (LastUpdateTag > 0)
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{
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if (m_Callback.OnLastUpdate(a_NBT.GetLong(LastUpdateTag)))
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{
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return;
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}
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}
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int TerrainPopulatedTag = a_NBT.FindChildByName(LevelTag, "TerrainPopulated");
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bool TerrainPopulated = (TerrainPopulatedTag < 0) ? false : (a_NBT.GetByte(TerrainPopulatedTag) != 0);
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if (m_Callback.OnTerrainPopulated(TerrainPopulated))
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{
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return;
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}
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int BiomesTag = a_NBT.FindChildByName(LevelTag, "Biomes");
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if (BiomesTag > 0)
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{
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if (m_Callback.OnBiomes((const unsigned char *)(a_NBT.GetData(BiomesTag))))
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{
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return;
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}
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}
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int HeightMapTag = a_NBT.FindChildByName(LevelTag, "HeightMap");
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if (HeightMapTag > 0)
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{
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if (m_Callback.OnHeightMap((const int *)(a_NBT.GetData(HeightMapTag))))
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{
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return;
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}
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}
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if (ProcessChunkSections(a_ChunkX, a_ChunkZ, a_NBT, LevelTag))
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{
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return;
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}
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// TODO: entities, tile-entities etc.
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}
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bool cProcessor::cThread::ProcessChunkSections(int a_ChunkX, int a_ChunkZ, cParsedNBT & a_NBT, int a_LevelTag)
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{
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int Sections = a_NBT.FindChildByName(a_LevelTag, "Sections");
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if (Sections < 0)
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{
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return false;
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}
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for (int Tag = a_NBT.GetFirstChild(Sections); Tag > 0; Tag = a_NBT.GetNextSibling(Tag))
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{
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int YTag = a_NBT.FindChildByName(Tag, "Y");
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int BlocksTag = a_NBT.FindChildByName(Tag, "Blocks");
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int AddTag = a_NBT.FindChildByName(Tag, "Add");
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int DataTag = a_NBT.FindChildByName(Tag, "Data");
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int BlockLightTag = a_NBT.FindChildByName(Tag, "BlockLightTag");
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int SkyLightTag = a_NBT.FindChildByName(Tag, "SkyLight");
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if ((YTag < 0) || (BlocksTag < 0) || (DataTag < 0))
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{
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continue;
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}
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if (m_Callback.OnSection(
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a_NBT.GetByte(YTag),
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(const BLOCKTYPE *) (a_NBT.GetData(BlocksTag)),
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(AddTag > 0) ? (const NIBBLETYPE *)(a_NBT.GetData(AddTag)) : NULL,
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(const NIBBLETYPE *)(a_NBT.GetData(DataTag)),
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(BlockLightTag > 0) ? (const NIBBLETYPE *)(a_NBT.GetData(BlockLightTag)) : NULL,
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(BlockLightTag > 0) ? (const NIBBLETYPE *)(a_NBT.GetData(BlockLightTag)) : NULL
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))
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{
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return true;
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}
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} // for Tag - Sections[]
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return false;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// cProcessor:
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cProcessor::cProcessor(void) :
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m_IsShuttingDown(false)
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{
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}
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cProcessor::~cProcessor()
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{
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}
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void cProcessor::ProcessWorld(const AString & a_WorldFolder, cCallbackFactory & a_CallbackFactory)
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{
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PopulateFileQueue(a_WorldFolder);
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// Start as many threads as there are cores:
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// Get number of cores by querying the system process affinity mask
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DWORD Affinity, ProcAffinity;
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GetProcessAffinityMask(GetCurrentProcess(), &ProcAffinity, &Affinity);
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while (Affinity > 0)
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{
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if ((Affinity & 1) == 1)
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{
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cCallback * Callback = a_CallbackFactory.GetNewCallback();
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m_Threads.push_back(new cThread(*Callback, *this));
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}
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Affinity >>= 1;
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} // while (Affinity > 0)
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if (m_Threads.size() == 0)
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{
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LOG("Zero cores detected - how am I running? Running in a single thread.");
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cCallback * Callback = a_CallbackFactory.GetNewCallback();
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m_Threads.push_back(new cThread(*Callback, *this));
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}
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// Wait for all threads to finish
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// simply by calling each thread's destructor sequentially
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for (cThreads::iterator itr = m_Threads.begin(), end = m_Threads.end(); itr != end; ++itr)
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{
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delete *itr;
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} // for itr - m_Threads[]
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}
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void cProcessor::PopulateFileQueue(const AString & a_WorldFolder)
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{
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LOG("Processing world in \"%s\"...", a_WorldFolder.c_str());
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AString Path = a_WorldFolder;
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Path.push_back(cFile::PathSeparator);
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AStringList AllFiles = GetDirectoryContents(Path.c_str());
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for (AStringList::iterator itr = AllFiles.begin(), end = AllFiles.end(); itr != end; ++itr)
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{
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if (itr->rfind(".mca") != itr->length() - 4)
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{
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// Not a .mca file
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continue;
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}
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m_FileQueue.push_back(Path + *itr);
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} // for itr - AllFiles[]
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}
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AString cProcessor::GetOneFileName(void)
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{
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cCSLock Lock(m_CS);
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if (m_FileQueue.empty())
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{
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return "";
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}
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AString res = m_FileQueue.back();
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m_FileQueue.pop_back();
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return res;
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}
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