1 files changed, 41 insertions, 0 deletions
diff --git a/source/core/StarNetCompatibility.hpp b/source/core/StarNetCompatibility.hpp
new file mode 100644
index 0000000..730546e
--- /dev/null
+++ b/source/core/StarNetCompatibility.hpp
@@ -0,0 +1,41 @@
+#pragma once
+#include "StarDataStream.hpp"
+
+namespace Star {
+
+
+enum class NetCompatibilityFilter {
+  None = 0,
+  Old = 1,
+  New = 2
+};
+
+struct NetCompatibilityRules {
+  NetCompatibilityRules() = default;
+  NetCompatibilityRules(uint64_t) = delete;
+  NetCompatibilityRules(bool legacy);
+
+  bool checkFilter(NetCompatibilityFilter const& filter) const;
+
+  bool isLegacy = false;
+};
+
+inline NetCompatibilityRules::NetCompatibilityRules(bool legacy) : isLegacy(legacy) {}
+
+inline bool NetCompatibilityRules::checkFilter(NetCompatibilityFilter const& filter) const {
+  if (filter == NetCompatibilityFilter::None)
+    return true;
+  else if (isLegacy)
+    return filter == NetCompatibilityFilter::Old;
+  else
+    return filter == NetCompatibilityFilter::New;
+}
+
+template <>
+struct hash<NetCompatibilityRules> {
+  size_t operator()(NetCompatibilityRules const& s) const {
+    return s.isLegacy;
+  }
+};
+
+}
+\ No newline at end of file