Kernel+LibPartition: Move MBRPartitionTable into LibPartition

1 files changed, 63 insertions, 0 deletions

diff --git a/Userland/Libraries/LibPartition/MBRPartitionTable.h b/Userland/Libraries/LibPartition/MBRPartitionTable.h
new file mode 100644
index 0000000000..454d30117d
--- /dev/null
+++ b/Userland/Libraries/LibPartition/MBRPartitionTable.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2020-2022, Liav A. <liavalb@hotmail.co.il>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Error.h>
+#include <LibPartition/PartitionTable.h>
+
+namespace Partition {
+
+class MBRPartitionTable : public PartitionTable {
+public:
+    struct [[gnu::packed]] Entry {
+        u8 status;
+        u8 chs1[3];
+        u8 type;
+        u8 chs2[3];
+        u32 offset;
+        u32 length;
+    };
+    struct [[gnu::packed]] Header {
+        u8 code1[218];
+        u16 ts_zero;
+        u8 ts_drive;
+        u8 ts_seconds;
+        u8 ts_minutes;
+        u8 ts_hours;
+        u8 code2[216];
+        u32 disk_signature;
+        u16 disk_signature_zero;
+        Entry entry[4];
+        u16 mbr_signature;
+    };
+
+public:
+    ~MBRPartitionTable();
+
+    static ErrorOr<NonnullOwnPtr<MBRPartitionTable>> try_to_initialize(Kernel::StorageDevice const&);
+    static OwnPtr<MBRPartitionTable> try_to_initialize(Kernel::StorageDevice const&, u32 start_lba);
+    explicit MBRPartitionTable(Kernel::StorageDevice const&);
+    MBRPartitionTable(Kernel::StorageDevice const&, u32 start_lba);
+
+    bool is_protective_mbr() const;
+    bool contains_ebr() const;
+    virtual bool is_valid() const override { return m_valid; };
+
+protected:
+    Header const& header() const;
+    bool is_header_valid() const { return m_header_valid; };
+
+private:
+    bool read_boot_record();
+    bool initialize();
+    bool m_valid { false };
+    bool m_header_valid { false };
+    const u32 m_start_lba;
+    ByteBuffer m_cached_header;
+};
+
+}