Kernel+LibPartition: Move GUIDPartitionTable into LibPartition

Userland/Libraries/LibPartition/GUIDPartitionTable.h

@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2020-2022, Liav A. <liavalb@hotmail.co.il>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibPartition/MBRPartitionTable.h>
+
+namespace Partition {
+
+struct GUIDPartitionHeader;
+class GUIDPartitionTable final : public MBRPartitionTable {
+public:
+    virtual ~GUIDPartitionTable() = default;
+
+    static ErrorOr<NonnullOwnPtr<GUIDPartitionTable>> try_to_initialize(Kernel::StorageDevice const&);
+    explicit GUIDPartitionTable(Kernel::StorageDevice const&);
+
+    virtual bool is_valid() const override { return m_valid; };
+
+private:
+    bool is_unused_entry(Array<u8, 16>) const;
+    GUIDPartitionHeader const& header() const;
+    bool initialize();
+
+    bool m_valid { true };
+    ByteBuffer m_cached_header;
+};
+
+}