From b691c43c44ff180d10e7d4a9afc83b98551ff586 Mon Sep 17 00:00:00 2001
From: daoge_cmd <3523206925@qq.com>
Date: Sun, 1 Mar 2026 12:16:08 +0800
Subject: Initial commit

---
 Minecraft.World/NbtIo.cpp | 65 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 Minecraft.World/NbtIo.cpp

(limited to 'Minecraft.World/NbtIo.cpp')

diff --git a/Minecraft.World/NbtIo.cpp b/Minecraft.World/NbtIo.cpp
new file mode 100644
index 00000000..b6c63277
--- /dev/null
+++ b/Minecraft.World/NbtIo.cpp
@@ -0,0 +1,65 @@
+#include "stdafx.h"
+#include "InputOutputStream.h"
+#include "NbtIo.h"
+
+CompoundTag *NbtIo::readCompressed(InputStream *in)
+{
+	MemSect(26);
+	// 4J - this was using a try/finally block
+	DataInputStream dis = DataInputStream(in); // 4J - was new GZIPInputStream as well
+	CompoundTag *ret = NbtIo::read((DataInput *)&dis);
+	dis.close();
+	MemSect(0);
+	return ret;
+}
+
+void NbtIo::writeCompressed(CompoundTag *tag, OutputStream *out)
+{
+	// 4J - this was using a try/finally block
+	// 4J Stu - Buffer output in 1024 byte chunks so that we can allocate properly in the save file
+	BufferedOutputStream bos = BufferedOutputStream( out, 1024 );
+	DataOutputStream dos = DataOutputStream(&bos); // 4J - was new GZIPOutputStream as well
+	NbtIo::write(tag, &dos);
+	dos.close();
+}
+
+// Reads tags from a stream created from the input buffer. Doesn't free the data in the source buffer.
+CompoundTag *NbtIo::decompress(byteArray buffer)
+{
+	ByteArrayInputStream bais = ByteArrayInputStream(buffer);
+	// 4J - this was using a try/finally block
+	DataInputStream in = DataInputStream(&bais); // 4J - was new GZIPInputStream as well
+	CompoundTag *ret = NbtIo::read((DataInput *)&in);
+	bais.reset();		// This stops the buffer referenced by the input stream from being freed when it goes out of context
+	in.close();
+	return ret;
+}
+
+byteArray NbtIo::compress(CompoundTag *tag)
+{
+	// 4J - this was using a try/finally block
+    ByteArrayOutputStream baos = ByteArrayOutputStream();
+    DataOutputStream dos = DataOutputStream(&baos); // 4J - was new GZIPOutputStream as well
+	NbtIo::write(tag, &dos);
+
+	byteArray ret(baos.buf.length);
+	System::arraycopy(baos.buf,0,&ret,0,baos.buf.length);
+	dos.close();
+	return ret;
+}
+
+CompoundTag *NbtIo::read(DataInput *dis)
+{
+	Tag *tag = Tag::readNamedTag(dis);
+
+	if( tag->getId() == Tag::TAG_Compound ) return (CompoundTag *)tag;
+
+	if(tag!=NULL) delete tag;
+	// Root tag must be a named compound tag
+	return NULL;
+}
+
+void NbtIo::write(CompoundTag *tag, DataOutput *dos)
+{
+	Tag::writeNamedTag(tag, dos);
+}
\ No newline at end of file
-- 
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