Initial commit

src/fbs/mgmtd/ChainRef.h

@@ -0,0 +1,49 @@
+#pragma once
+
+#include <fmt/core.h>
+#include <functional>
+
+#include "MgmtdTypes.h"
+#include "common/utils/StrongType.h"
+
+namespace hf3fs::flat {
+
+class ChainRef {
+ public:
+  ChainRef() {}
+  ChainRef(ChainTableId tableId, ChainTableVersion tableVer, uint64_t index)
+      : chainTableId(tableId),
+        chainTableVersion(tableVer),
+        chainIndex(index) {}
+
+  std::tuple<ChainTableId, ChainTableVersion, uint64_t> decode() const {
+    return std::make_tuple(chainTableId, chainTableVersion, chainIndex);
+  }
+
+  ChainTableId tableId() const { return chainTableId; }
+
+  ChainTableVersion tableVersion() const { return chainTableVersion; }
+
+  uint64_t index() const { return chainIndex; }
+
+  auto operator<=>(const ChainRef &) const = default;
+
+ private:
+  ChainTableId chainTableId{0};
+  ChainTableVersion chainTableVersion{0};
+  uint64_t chainIndex{0};
+};
+}  // namespace hf3fs::flat
+
+FMT_BEGIN_NAMESPACE
+
+template <>
+struct formatter<hf3fs::flat::ChainRef> : formatter<std::string_view> {
+  template <typename FormatContext>
+  auto format(const hf3fs::flat::ChainRef &ref, FormatContext &ctx) const {
+    auto [id, v, i] = ref.decode();
+    return format_to(ctx.out(), "ChainRef({}@{}-{})", id.toUnderType(), v.toUnderType(), i);
+  }
+};
+
+FMT_END_NAMESPACE