From afdbb1d71bb69cf20cd7458e192be0c9308515ba Mon Sep 17 00:00:00 2001
From: "madmaxoft@gmail.com"
 <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>
Date: Wed, 6 Feb 2013 22:29:29 +0000
Subject: cBlockArea can now be loaded from a .schematic file.

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1195 0a769ca7-a7f5-676a-18bf-c427514a06d6
---
 source/BlockArea.cpp | 122 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)

(limited to 'source/BlockArea.cpp')

diff --git a/source/BlockArea.cpp b/source/BlockArea.cpp
index 4f8de925c..cdabf0378 100644
--- a/source/BlockArea.cpp
+++ b/source/BlockArea.cpp
@@ -7,6 +7,8 @@
 #include "Globals.h"
 #include "BlockArea.h"
 #include "World.h"
+#include "zlib.h"
+#include "WorldStorage/FastNBT.h"
 
 
 
@@ -188,6 +190,46 @@ void cBlockArea::DumpToRawFile(const AString & a_FileName)
 
 
 
+bool cBlockArea::LoadFromSchematicFile(const AString & a_FileName)
+{
+	// Un-GZip the contents:
+	AString Contents;
+	gzFile File = gzopen(a_FileName.c_str(), "rb");
+	if (File == NULL)
+	{
+		LOG("Cannot open the schematic file \"%s\".", a_FileName.c_str());
+		return false;
+	}
+	// Since the gzip format doesn't really support getting the uncompressed length, we need to read incrementally. Yuck!
+	int NumBytesRead = 0;
+	char Buffer[32 KiB];
+	while ((NumBytesRead = gzread(File, Buffer, sizeof(Buffer))) > 0)
+	{
+		Contents.append(Buffer, NumBytesRead);
+	}
+	if (NumBytesRead < 0)
+	{
+		LOG("Cannot read GZipped data in the schematic file \"%s\", error %d", a_FileName.c_str(), NumBytesRead);
+		gzclose(File);
+		return false;
+	}
+	gzclose(File);
+	
+	// TODO: Parse the NBT:
+	cParsedNBT NBT(Contents.data(), Contents.size());
+	if (!NBT.IsValid())
+	{
+		LOG("Cannot parse the NBT in the schematic file \"%s\".", a_FileName.c_str());
+		return false;
+	}
+	
+	return LoadFromSchematicNBT(NBT);
+}
+
+
+
+
+
 void cBlockArea::Crop(int a_AddMinX, int a_SubMaxX, int a_AddMinY, int a_SubMaxY, int a_AddMinZ, int a_SubMaxZ)
 {
 	if (HasBlockTypes())
@@ -799,3 +841,83 @@ void cBlockArea::CropNibbles(NIBBLEARRAY & a_Array, int a_AddMinX, int a_SubMaxX
 
 
 
+
+bool cBlockArea::LoadFromSchematicNBT(cParsedNBT & a_NBT)
+{
+	int TMaterials = a_NBT.FindChildByName(a_NBT.GetRoot(), "Materials");
+	if ((TMaterials > 0) && (a_NBT.GetType(TMaterials) == TAG_String))
+	{
+		AString Materials = a_NBT.GetString(TMaterials);
+		if (Materials.compare("Alpha") != 0)
+		{
+			LOG("Materials tag is present and \"%s\" instead of \"Alpha\". Possibly a wrong-format schematic file.", Materials.c_str());
+			return false;
+		}
+	}
+	int TSizeX = a_NBT.FindChildByName(a_NBT.GetRoot(), "Width");
+	int TSizeY = a_NBT.FindChildByName(a_NBT.GetRoot(), "Height");
+	int TSizeZ = a_NBT.FindChildByName(a_NBT.GetRoot(), "Length");
+	if (
+		(TSizeX < 0) || (TSizeY < 0) || (TSizeZ < 0) ||
+		(a_NBT.GetType(TSizeX) != TAG_Short) ||
+		(a_NBT.GetType(TSizeY) != TAG_Short) ||
+		(a_NBT.GetType(TSizeZ) != TAG_Short)
+	)
+	{
+		LOG("Dimensions are missing from the schematic file (%d, %d, %d), (%d, %d, %d)",
+			TSizeX, TSizeY, TSizeZ,
+			a_NBT.GetType(TSizeX), a_NBT.GetType(TSizeY), a_NBT.GetType(TSizeZ)
+		);
+		return false;
+	}
+	
+	int SizeX = a_NBT.GetShort(TSizeX);
+	int SizeY = a_NBT.GetShort(TSizeY);
+	int SizeZ = a_NBT.GetShort(TSizeZ);
+	if ((SizeX < 1) || (SizeY < 1) || (SizeZ < 1))
+	{
+		LOG("Dimensions are invalid in the schematic file: %d, %d, %d", SizeX, SizeY, SizeZ);
+		return false;
+	}
+	
+	int TBlockTypes = a_NBT.FindChildByName(a_NBT.GetRoot(), "Blocks");
+	int TBlockMetas = a_NBT.FindChildByName(a_NBT.GetRoot(), "Data");
+	if ((TBlockTypes < 0) || (a_NBT.GetType(TBlockTypes) != TAG_ByteArray))
+	{
+		LOG("BlockTypes are invalid in the schematic file: %d", TBlockTypes);
+		return false;
+	}
+	bool AreMetasPresent = (TBlockMetas > 0) && (a_NBT.GetType(TBlockMetas) == TAG_ByteArray);
+	
+	SetSize(SizeX, SizeY, SizeZ, AreMetasPresent ? (baTypes | baMetas) : baTypes);
+	
+	// Copy the block types and metas:
+	int NumBytes = m_SizeX * m_SizeY * m_SizeZ;
+	if (a_NBT.GetDataLength(TBlockTypes) < NumBytes)
+	{
+		LOG("BlockTypes truncated in the schematic file (exp %d, got %d bytes). Loading partial.",
+			NumBytes, a_NBT.GetDataLength(TBlockTypes)
+		);
+		NumBytes = a_NBT.GetDataLength(TBlockTypes);
+	}
+	memcpy(m_BlockTypes, a_NBT.GetData(TBlockTypes), NumBytes);
+	
+	if (AreMetasPresent)
+	{
+		int NumBytes = m_SizeX * m_SizeY * m_SizeZ;
+		if (a_NBT.GetDataLength(TBlockMetas) < NumBytes)
+		{
+			LOG("BlockMetas truncated in the schematic file (exp %d, got %d bytes). Loading partial.",
+				NumBytes, a_NBT.GetDataLength(TBlockMetas)
+			);
+			NumBytes = a_NBT.GetDataLength(TBlockMetas);
+		}
+		memcpy(m_BlockMetas, a_NBT.GetData(TBlockMetas), NumBytes);
+	}
+	
+	return true;
+}
+
+
+
+
-- 
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