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5254a320d8
This is obviously more readable. If we ever run into a situation where ref count churn is actually causing trouble in the future, we can deal with it then. For now, let's keep it simple. :^)
48 lines
963 B
C++
48 lines
963 B
C++
#pragma once
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#include <AK/RefPtr.h>
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#include <AK/Vector.h>
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#include <Kernel/Devices/DiskDevice.h>
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#include <Kernel/Devices/DiskPartition.h>
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#define MBR_SIGNATURE 0xaa55
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struct MBRPartitionEntry {
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u8 status;
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u8 chs1[3];
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u8 type;
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u8 chs2[3];
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u32 offset;
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u32 length;
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} __attribute__((packed));
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struct MBRPartitionHeader {
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u8 code1[218];
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u16 ts_zero;
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u8 ts_drive, ts_seconds, ts_minutes, ts_hours;
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u8 code2[216];
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u32 disk_signature;
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u16 disk_signature_zero;
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MBRPartitionEntry entry[4];
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u16 mbr_signature;
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} __attribute__((packed));
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class MBRPartitionTable {
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AK_MAKE_ETERNAL
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public:
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MBRPartitionTable(NonnullRefPtr<DiskDevice>);
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~MBRPartitionTable();
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bool initialize();
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RefPtr<DiskPartition> partition(unsigned index);
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private:
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NonnullRefPtr<DiskDevice> m_device;
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ByteBuffer read_header() const;
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const MBRPartitionHeader& header() const;
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u8 m_cached_header[512];
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};
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