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//! Hikari GPT Types
const efi = @import("../../efi/efi.zig");
const constants = @import("constants.zig");
pub const Header = extern struct {
signature: u64,
revision: u32,
header_size: u32,
header_crc32: u32,
reserved: u32,
current_lba: u64,
backup_lba: u64,
first_usable_lba: u64,
last_usable_lba: u64,
disk_guid: efi.types.Guid,
partition_entries_lba: u64,
partition_entries_count: u32,
partition_entry_size: u32,
partition_entries_crc32: u32,
};
pub const PartitionEntry = extern struct {
partition_type_guid: efi.types.Guid,
unique_partition_guid: efi.types.Guid,
starting_lba: u64,
ending_lba: u64,
attributes: PartitionAttributes,
partition_identity: [constants.partition_identity_length]u16,
pub fn is_empty(self: *const PartitionEntry) bool {
return self.partition_type_guid.time_low == 0 and
self.partition_type_guid.time_mid == 0 and
self.partition_type_guid.time_high_and_version == 0 and
@as(u64, @bitCast(self.partition_type_guid.clock_sequence_and_node)) == 0;
}
pub fn is_type(self: *const PartitionEntry, type_guid: efi.types.Guid) bool {
return self.partition_type_guid.equals(type_guid);
}
pub fn size_in_blocks(self: *const PartitionEntry) u64 {
if (self.ending_lba < self.starting_lba) {
return 0;
}
return self.ending_lba - self.starting_lba + 1;
}
pub fn size_in_bytes(self: *const PartitionEntry, block_size: u32) u64 {
return self.size_in_blocks() * block_size;
}
};
pub const PartitionAttributes = packed struct(u64) {
required_for_platform: bool,
efi_firmware_ignore: bool,
legacy_bios_bootable: bool,
reserved_bits_3_47: u45,
guid_specific_bits_48_63: u16,
};
pub const ProtectiveMbr = extern struct {
bootstrap_code: [440]u8,
disk_signature: u32,
reserved: u16,
partitions: [4]MbrPartitionRecord,
boot_signature: u16,
};
pub const MbrPartitionRecord = extern struct {
boot_indicator: u8,
starting_chs: [3]u8,
os_type: u8,
ending_chs: [3]u8,
starting_lba: u32,
size_in_lba: u32,
};
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