1 files changed, 281 insertions, 0 deletions

diff --git a/src/ChunkData.h b/src/ChunkData.h
new file mode 100644
index 000000000..9c852ee24
--- /dev/null
+++ b/src/ChunkData.h
@@ -0,0 +1,281 @@
+
+#pragma once
+
+
+#include <cstring>
+
+
+#include "ChunkDef.h"
+
+
+#define CHUNK_SECTION_HEIGHT 16
+#define CHUNK_SECTION_NUM (256 / CHUNK_SECTION_HEIGHT)
+
+#if __cplusplus < 201103L
+// auto_ptr style interface for memory management
+#else
+// unique_ptr style interface for memory management
+#endif
+
+class cChunkData
+{
+public:
+
+	cChunkData()
+	#if __cplusplus < 201103L
+	// auto_ptr style interface for memory management
+	: IsOwner(true)
+	#endif
+	{
+		memset(m_Sections, 0, sizeof(m_Sections));
+	}
+	~cChunkData()
+	{
+		#if __cplusplus < 201103L
+		// auto_ptr style interface for memory management
+		if (!IsOwner) return;
+		#endif
+		for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+		{
+			if (m_Sections[i] == NULL) Free(m_Sections[i]);;
+		}
+	}
+	
+	#if __cplusplus < 201103L
+	// auto_ptr style interface for memory management
+	cChunkData(const cChunkData& other) :
+	IsOwner(true)
+	{
+		for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+		{
+			m_Sections[i] = other.m_Sections[i];
+		}
+		other.IsOwner = false;
+	}
+
+	cChunkData& operator=(const cChunkData& other)
+	{
+		if (&other != this)
+		{
+			if (IsOwner)
+			{
+				for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+				{
+					if (m_Sections[i]) Free(m_Sections[i]);;
+				}
+			}
+			IsOwner = true;
+			for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+			{
+				m_Sections[i] = other.m_Sections[i];
+			}
+			other.IsOwner = false;
+		}
+		return *this;
+		
+	}
+	#else
+	// unique_ptr style interface for memory management
+	cChunkData(cChunkData&& other)
+	{
+		for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+		{
+			m_Sections[i] = other.m_Sections[i];
+			other.m_Sections[i] = 0;
+		}
+	}
+	
+	cChunkData& operator=(cChunkData&& other)
+	{
+		if (&other != this)
+		{
+			for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+			{
+				Free(m_Sections[i]);;
+				m_Sections[i] = other.m_Sections[i];
+				other.m_Sections[i] = 0;
+			}
+		}
+		return *this;
+	}
+	#endif
+
+	BLOCKTYPE GetBlock(int a_X, int a_Y, int a_Z) const
+	{
+		ASSERT((a_X >= 0) && (a_X < cChunkDef::Width));
+		ASSERT((a_Y >= 0) && (a_Y < cChunkDef::Height));
+		ASSERT((a_Z >= 0) && (a_Z < cChunkDef::Width));
+		int Section = a_Y / CHUNK_SECTION_HEIGHT;
+		if (m_Sections[Section] != NULL)
+		{
+			int Index = cChunkDef::MakeIndexNoCheck(a_X, a_Y - (Section * CHUNK_SECTION_HEIGHT), a_Z);
+			return m_Sections[Section]->m_BlockTypes[Index];
+		}
+		else
+		{
+			return 0;
+		}
+	}
+	
+	void SetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_Block)
+	{
+		if (
+			(a_RelX >= cChunkDef::Width)  || (a_RelX < 0) ||
+			(a_RelY >= cChunkDef::Height) || (a_RelY < 0) ||
+			(a_RelZ >= cChunkDef::Width)  || (a_RelZ < 0)
+		)
+		{
+			ASSERT(!"cChunkData::SetMeta(): index out of range!");
+			return;
+		}
+
+		int Section = a_RelY / CHUNK_SECTION_HEIGHT;
+		if (m_Sections[Section] == NULL)
+		{
+			if (a_Block == 0x00)
+			{
+				return;
+			}
+			m_Sections[Section] = Allocate();
+			if (m_Sections[Section] == NULL)
+			{
+				ASSERT(!"Failed to allocate a new section in Chunkbuffer");
+				return;
+			}
+			ZeroSection(m_Sections[Section]);
+		}
+		int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * CHUNK_SECTION_HEIGHT), a_RelZ);
+		m_Sections[Section]->m_BlockTypes[Index] = a_Block;
+	}
+
+	NIBBLETYPE GetMeta(int a_RelX, int a_RelY, int a_RelZ) const
+	{
+		if ((a_RelX < cChunkDef::Width) && (a_RelX > -1) && (a_RelY < cChunkDef::Height) && (a_RelY > -1) && (a_RelZ < cChunkDef::Width) && (a_RelZ > -1))
+		{
+			int Section = a_RelY / CHUNK_SECTION_HEIGHT;
+			if (m_Sections[Section] != NULL)
+			{
+				int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * CHUNK_SECTION_HEIGHT), a_RelZ);
+				return (m_Sections[Section]->m_BlockMeta[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
+			}
+			else
+			{
+				return 0;
+			}
+		}
+		ASSERT(!"cChunkData::GetMeta(): coords out of chunk range!");
+		return 0;
+	}
+	
+	bool SetMeta(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_Nibble)
+	{
+		if (
+			(a_RelX >= cChunkDef::Width)  || (a_RelX < 0) ||
+			(a_RelY >= cChunkDef::Height) || (a_RelY < 0) ||
+			(a_RelZ >= cChunkDef::Width)  || (a_RelZ < 0)
+		)
+		{
+			ASSERT(!"cChunkData::SetMeta(): index out of range!");
+			return false;
+		}
+
+		int Section = a_RelY / CHUNK_SECTION_HEIGHT;
+		if (m_Sections[Section] == NULL)
+		{
+			if ((a_Nibble & 0xf) == 0x00)
+			{
+				return false;
+			}
+			m_Sections[Section] = Allocate();
+			if (m_Sections[Section] == NULL)
+			{
+				ASSERT(!"Failed to allocate a new section in Chunkbuffer");
+				return false;
+			}
+			ZeroSection(m_Sections[Section]);
+		}
+		int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * CHUNK_SECTION_HEIGHT), a_RelZ);
+		NIBBLETYPE oldval = m_Sections[Section]->m_BlockMeta[Index / 2] >> ((Index & 1) * 4) & 0xf;
+		m_Sections[Section]->m_BlockMeta[Index / 2] = static_cast<NIBBLETYPE>(
+			(m_Sections[Section]->m_BlockMeta[Index / 2] & (0xf0 >> ((Index & 1) * 4))) |  // The untouched nibble
+			((a_Nibble & 0x0f) << ((Index & 1) * 4))  // The nibble being set
+		);
+		return oldval == a_Nibble;
+	}
+	
+	NIBBLETYPE GetBlockLight(int a_RelX, int a_RelY, int a_RelZ) const
+	{
+		if ((a_RelX < cChunkDef::Width) && (a_RelX > -1) && (a_RelY < cChunkDef::Height) && (a_RelY > -1) && (a_RelZ < cChunkDef::Width) && (a_RelZ > -1))
+		{
+			int Section = a_RelY / CHUNK_SECTION_HEIGHT;
+			if (m_Sections[Section] != NULL)
+			{
+				int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * CHUNK_SECTION_HEIGHT), a_RelZ);
+				return (m_Sections[Section]->m_BlockLight[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
+			}
+			else
+			{
+				return 0;
+			}
+		}
+		ASSERT(!"cChunkData::GetMeta(): coords out of chunk range!");
+		return 0;
+	}
+	
+	NIBBLETYPE GetSkyLight(int a_RelX, int a_RelY, int a_RelZ) const
+	{
+		if ((a_RelX < cChunkDef::Width) && (a_RelX > -1) && (a_RelY < cChunkDef::Height) && (a_RelY > -1) && (a_RelZ < cChunkDef::Width) && (a_RelZ > -1))
+		{
+			int Section = a_RelY / CHUNK_SECTION_HEIGHT;
+			if (m_Sections[Section] != NULL)
+			{
+				int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * CHUNK_SECTION_HEIGHT), a_RelZ);
+				return (m_Sections[Section]->m_BlockLight[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
+			}
+			else
+			{
+				return 0xF;
+			}
+		}
+		ASSERT(!"cChunkData::GetMeta(): coords out of chunk range!");
+		return 0;
+	}
+	
+	cChunkData Copy() const;
+	void CopyBlocks   (BLOCKTYPE * a_dest, size_t a_Idx = 0, size_t length = cChunkDef::NumBlocks)  const;
+	void CopyMeta     (NIBBLETYPE * a_dest) const;
+	void CopyLight    (NIBBLETYPE * a_dest) const;
+	void CopySkyLight (NIBBLETYPE * a_dest) const;
+	
+	void SetBlocks    (const BLOCKTYPE * a_src);
+	void SetMeta      (const NIBBLETYPE * a_src);
+	void SetLight     (const NIBBLETYPE * a_src);
+	void SetSkyLight  (const NIBBLETYPE * a_src);
+	
+private:
+
+	#if __cplusplus < 201103L
+	// auto_ptr style interface for memory management
+	mutable bool IsOwner;
+	#endif
+	
+	struct sChunkSection {
+		BLOCKTYPE  m_BlockTypes   [CHUNK_SECTION_HEIGHT * 16 * 16]    ;
+		NIBBLETYPE m_BlockMeta    [CHUNK_SECTION_HEIGHT * 16 * 16 / 2];
+		NIBBLETYPE m_BlockLight   [CHUNK_SECTION_HEIGHT * 16 * 16 / 2];
+		NIBBLETYPE m_BlockSkyLight[CHUNK_SECTION_HEIGHT * 16 * 16 / 2];
+	};
+	
+	sChunkSection *m_Sections[CHUNK_SECTION_NUM];
+	
+	sChunkSection * Allocate() const;
+	void Free(sChunkSection * ptr) const;
+	
+	void ZeroSection(sChunkSection * ptr) const;
+};
+
+
+
+
+
+