4 files changed, 29 insertions, 41 deletions

diff --git a/AnvilStats/AnvilStats.txt b/AnvilStats/AnvilStats.txt
index 74c12d0af..07c518e4c 100644
--- a/AnvilStats/AnvilStats.txt
+++ b/AnvilStats/AnvilStats.txt
@@ -18,7 +18,7 @@ Possible usage:
 

 This project is Windows-only, although it shouldn't be too difficult to make it portable.

 

-

+Because this project uses NBT extensively, it runs much faster in Release mode.

 

 

 */

diff --git a/AnvilStats/AnvilStats.vcproj b/AnvilStats/AnvilStats.vcproj
index 6e8038a1c..eaf861376 100644
--- a/AnvilStats/AnvilStats.vcproj
+++ b/AnvilStats/AnvilStats.vcproj
@@ -142,6 +142,7 @@
 				LinkIncremental="1"

 				GenerateDebugInformation="true"

 				SubSystem="1"

+				StackReserveSize="16777216"

 				OptimizeReferences="2"

 				EnableCOMDATFolding="2"

 				TargetMachine="1"

diff --git a/AnvilStats/Processor.cpp b/AnvilStats/Processor.cpp
index 0d9bc4694..7a2668ea4 100644
--- a/AnvilStats/Processor.cpp
+++ b/AnvilStats/Processor.cpp
@@ -14,7 +14,6 @@
 

 

 const int CHUNK_INFLATE_MAX = 1 MiB;

-const int MAX_COMPRESSED_CHUNK_SIZE = 1 MiB;

 

 

 

@@ -77,20 +76,30 @@ void cProcessor::cThread::ProcessFile(const AString & a_FileName)
 		return;

 	}

 	

-	int Header[2048];

-	if (f.Read(Header, sizeof(Header)) != sizeof(Header))

+	AString FileContents;

+	f.ReadRestOfFile(FileContents);

+	if (FileContents.size() < sizeof(8 KiB))

 	{

 		LOG("Cannot read header in file \"%s\", skipping file.", a_FileName.c_str());

 		return;

 	}

 	

+	ProcessFileData(FileContents.data(), FileContents.size(), RegionX * 32, RegionZ * 32);

+}

+

+

+

+

+

+void cProcessor::cThread::ProcessFileData(const char * a_FileData, size_t a_Size, int a_ChunkBaseX, int a_ChunkBaseZ)

+{

+	int Header[2048];

+	int * HeaderPtr = (int *)a_FileData;

 	for (int i = 0; i < ARRAYCOUNT(Header); i++)

 	{

-		Header[i] = ntohl(Header[i]);

+		Header[i] = ntohl(HeaderPtr[i]);

 	}

 	

-	int ChunkBaseX = RegionX * 32;

-	int ChunkBaseZ = RegionZ * 32;

 	for (int i = 0; i < 1024; i++)

 	{

 		unsigned Location = Header[i];

@@ -98,19 +107,20 @@ void cProcessor::cThread::ProcessFile(const AString & a_FileName)
 		if (

 			((Location == 0) && (Timestamp == 0)) || // Official docs' "not present"

 			(Location >> 8 < 2)                   || // Logical - no chunk can start inside the header

-			((Location & 0xff) == 0)                 // Logical - no chunk can be zero bytes

+			((Location & 0xff) == 0)              || // Logical - no chunk can be zero bytes

+			((Location >> 8) * 4096 > a_Size)        // Logical - no chunk can start at beyond the file end

 		)

 		{

 			// Chunk not present in the file

 			continue;

 		}

-		int ChunkX = ChunkBaseX + (i % 32);

-		int ChunkZ = ChunkBaseZ + (i / 32);

+		int ChunkX = a_ChunkBaseX + (i % 32);

+		int ChunkZ = a_ChunkBaseZ + (i / 32);

 		if (m_Callback.OnNewChunk(ChunkX, ChunkZ))

 		{

 			continue;

 		}

-		ProcessChunk(f, ChunkX, ChunkZ, Location >> 8, Location & 0xff, Timestamp);

+		ProcessChunk(a_FileData, ChunkX, ChunkZ, Location >> 8, Location & 0xff, Timestamp);

 	}  // for i - chunk index

 }

 

@@ -118,47 +128,23 @@ void cProcessor::cThread::ProcessFile(const AString & a_FileName)
 

 

 

-void cProcessor::cThread::ProcessChunk(cFile & a_File, int a_ChunkX, int a_ChunkZ, unsigned a_SectorStart, unsigned a_SectorSize, unsigned a_TimeStamp)

+void cProcessor::cThread::ProcessChunk(const char * a_FileData, int a_ChunkX, int a_ChunkZ, unsigned a_SectorStart, unsigned a_SectorSize, unsigned a_TimeStamp)

 {

 	if (m_Callback.OnHeader(a_SectorStart * 4096, a_SectorSize, a_TimeStamp))

 	{

 		return;

 	}

 	

-	if (a_File.Seek(a_SectorStart * 4096) < 0)

-	{

-		LOG("Seeking to sector %d failed, skipping chunk [%d, %d]", a_SectorStart, a_ChunkX, a_ChunkZ);

-		return;

-	}

-	

-	int ByteSize;

-	if (a_File.Read(&ByteSize, sizeof(ByteSize)) != sizeof(ByteSize))

-	{

-		LOG("Cannot read bytesize at offset %d, skipping chunk [%d, %d].", a_SectorStart * 4096, a_ChunkX, a_ChunkZ);

-		return;

-	}

-	ByteSize = ntohl(ByteSize);

-	

-	char CompressionMethod;

-	if (a_File.Read(&CompressionMethod, sizeof(CompressionMethod)) != sizeof(CompressionMethod))

-	{

-		LOG("Cannot read CompressionMethod at offset %d, skipping chunk [%d, %d].", a_SectorStart * 4096 + 4, a_ChunkX, a_ChunkZ);

-		return;

-	}

+	const char * ChunkStart = a_FileData + a_SectorStart * 4096;

+	int ByteSize = ntohl(*(int *)ChunkStart);

+	char CompressionMethod = ChunkStart[4];

 	

 	if (m_Callback.OnCompressedDataSizePos(ByteSize, a_SectorStart * 4096 + 5, CompressionMethod))

 	{

 		return;

 	}

 

-	char CompressedData[MAX_COMPRESSED_CHUNK_SIZE];

-	if (a_File.Read(CompressedData, ByteSize - 1) != ByteSize - 1)

-	{

-		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);

-		return;

-	}

-	

-	ProcessCompressedChunkData(a_ChunkX, a_ChunkZ, CompressedData, ByteSize);

+	ProcessCompressedChunkData(a_ChunkX, a_ChunkZ, ChunkStart + 5, ByteSize);

 }

 

 

diff --git a/AnvilStats/Processor.h b/AnvilStats/Processor.h
index 300185e67..09dc980ec 100644
--- a/AnvilStats/Processor.h
+++ b/AnvilStats/Processor.h
@@ -35,7 +35,8 @@ class cProcessor
 		virtual void Execute(void) override;

 		

 		void ProcessFile(const AString & a_FileName);

-		void ProcessChunk(cFile & a_File, int a_ChunkX, int a_ChunkZ, unsigned a_SectorStart, unsigned a_SectorSize, unsigned a_TimeStamp);

+		void ProcessFileData(const char * a_FileData, size_t a_Size, int a_ChunkBaseX, int a_ChunkBaseZ);

+		void ProcessChunk(const char * a_FileData, int a_ChunkX, int a_ChunkZ, unsigned a_SectorStart, unsigned a_SectorSize, unsigned a_TimeStamp);

 		void ProcessCompressedChunkData(int a_ChunkX, int a_ChunkZ, const char * a_CompressedData, int a_CompressedSize);

 		void ProcessParsedChunkData(int a_ChunkX, int a_ChunkZ, cParsedNBT & a_NBT);

 		bool ProcessChunkSections(int a_ChunkX, int a_ChunkZ, cParsedNBT & a_NBT, int a_LevelTag);