first commit

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);
+}