Add basic network classes and message pooling

Source/Engine/Networking/NetworkMessage.cpp

@@ -0,0 +1,29 @@
+// Copyright (c) 2012-2021 Wojciech Figat. All rights reserved.
+
+#include "NetworkMessage.h"
+
+void NetworkMessage::WriteBytes(uint8* bytes, const int numBytes)
+{
+    ASSERT(Position + numBytes < BufferSize);
+    Platform::MemoryCopy(Buffer + Position, bytes, numBytes);
+    Position += numBytes;
+}
+
+void NetworkMessage::ReadBytes(uint8* bytes, const int numBytes)
+{
+    ASSERT(Position + numBytes < BufferSize);
+    Platform::MemoryCopy(bytes, Buffer + Position, numBytes);
+    Position += numBytes;
+}
+
+void NetworkMessage::WriteUInt32(uint32 value)
+{
+    WriteBytes(reinterpret_cast<uint8*>(&value), sizeof(uint32));
+}
+
+uint32 NetworkMessage::ReadUInt32()
+{
+    uint32 value = 0;
+    ReadBytes(reinterpret_cast<uint8*>(&value), sizeof(uint32));
+    return value;
+}