gpt

type GPTHeader struct {
	// Signature for this header.
	// Must be "EFI PART"
	Signature [8]byte

	// GPT version that this header is encoded with
	Revision uint32

	// must be >= 92 and <= logical block size
	HeaderSize uint32

	// A CRC32 check for this header. The CRC is encoded with this field
	HeaderCRC32 uint32

	// Must be zero (given a field name instead of _ so that it can
	// be verified.)
	Reserved uint32

	// The logical block address of this header
	// Should be "1" for the primary header, and AltLBA of the primary
	// header for the secondary header
	MyLBA uint64

	// The logical block address of the secondary/backup GPT header
	// (or the primary, if this header is the secondary)
	AltLBA uint64

	// The first block of the hard drive useable by GPT partitions
	FirstUseableLBA uint64
	// The last block of the hard drive useable by GPT partitions (there
	// must leave enough space for the secondary GPT header.)
	LastUseableLBA uint64

	// A unique GUID for this disk.
	Disk GUID

	// The block at which the GPT partition table starts
	PartitionEntryLBA uint64

	// The maximum number of partitions that can be stored in the GPT
	// partition table pointed to by PartitionEntryLBA. (May span multiple
	// blocks)
	MaxNumberPartitionEntries uint32

	// The size of a single GPT partition entry
	SizeOfPartitionEntry uint32

	// A CRC32 check of the partition entry array.
	PartitionEntryArrayCRC32 uint32

	// Zero padding to ensure that the GPTHeader takes up exactly 1 block.
	// Must be zero.
	Padding [LogicalBlockSize - 92]byte
}

type GPTPartitionAttribute uint64

type GPTPartitionEntry struct {
	// The type of partition
	PartitionType GUID
	// A unique GUID for this instance of this partition
	UniqueParitition GUID

	// Starting and ending Logical Block Address of this partition.
	StartingLBA uint64
	EndingLBA   uint64

	// Attributes for this GPT partition
	Attributes GPTPartitionAttribute

	// A UTF16 encoded (yes, UEFI is really that stupid) string for the
	// name of this partition. May be empty. Use GetName() method to
	// get this value as a Go string type.
	PartitionName [36]uint16
}

type GUID struct {
	TimeLow             uint32
	TimeMid             uint16
	TimeHighAndVersion  uint16
	ClockSeqAndReserved uint8
	ClockSeqLow         uint8
	Node                [6]byte
}

type LogicalBlock [LogicalBlockSize]byte