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/ZoneIo.cpp | 48 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 Minecraft.World/ZoneIo.cpp

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

diff --git a/Minecraft.World/ZoneIo.cpp b/Minecraft.World/ZoneIo.cpp
new file mode 100644
index 00000000..f1838c86
--- /dev/null
+++ b/Minecraft.World/ZoneIo.cpp
@@ -0,0 +1,48 @@
+#include "stdafx.h"
+#include "ByteBuffer.h"
+#include "ZoneIo.h"
+
+ZoneIo::ZoneIo(HANDLE channel, __int64 pos)
+{
+	this->channel = channel;
+	this->pos = pos;
+}
+
+void ZoneIo::write(byteArray bb, int size)
+{
+    ByteBuffer *buff = ByteBuffer::wrap(bb);
+//    if (bb.length != size) throw new IllegalArgumentException("Expected " + size + " bytes, got " + bb.length);	// 4J - TODO
+    buff->order(ZonedChunkStorage::BYTEORDER);
+    buff->position(bb.length);
+    buff->flip();
+    write(buff, size);
+	delete buff;
+}
+
+void ZoneIo::write(ByteBuffer *bb, int size)
+{
+	DWORD numberOfBytesWritten;
+	SetFilePointer(channel,(int)pos,NULL,NULL);
+	WriteFile(channel,bb->getBuffer(), bb->getSize(),&numberOfBytesWritten,NULL);
+    pos += size;
+}
+
+ByteBuffer *ZoneIo::read(int size)
+{
+	DWORD numberOfBytesRead;
+    byteArray bb = byteArray(size);
+	SetFilePointer(channel,(int)pos,NULL,NULL);
+    ByteBuffer *buff = ByteBuffer::wrap(bb);
+	// 4J - to investigate - why is this buffer flipped before anything goes in it?
+    buff->order(ZonedChunkStorage::BYTEORDER);
+    buff->position(size);
+    buff->flip();
+	ReadFile(channel, buff->getBuffer(), buff->getSize(), &numberOfBytesRead, NULL);
+    pos += size;
+    return buff;
+}
+
+void ZoneIo::flush()
+{
+	// 4J - was channel.force(false);
+}
\ No newline at end of file
-- 
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