/// <summary>
/// Create a GUID Partition Table entry
/// </summary>
/// <param name="typeId">A unique identifier indicating the type of the partition</param>
/// <param name="entryId">A unique identifier for the partition</param>
/// <param name="flags">The flags to set on the partition</param>
/// <param name="name">The name of the partition</param>
/// <param name="offset">The offset of the partition in it's container file</param>
/// <param name="length">The length of the partition</param>
/// <param name="stream">The stream containing the partition data</param>
public GptPartitionEntry(Guid typeId, Guid entryId, GptPartitionFlags flags, string name, long offset, long length, Stream stream) : base(offset, length, stream)
{
TypeId = typeId;
EntryId = entryId;
Flags = flags;
Name = name;
}
/// <inheritdoc />
protected override IEnumerable <PartitionEntry> LoadPartitions()
{
using BinaryReader br = new BinaryReader(_container.Content, Encoding.ASCII, true);
br.BaseStream.Seek(_sectorSize, SeekOrigin.Begin);
_header = new GptHeader(br);
if (_header.Signature != "EFI PART")
{
throw new InvalidDataException("Not a GPT Protective Partition");
}
br.BaseStream.Seek((long)(_sectorSize * _header.TableLBA), SeekOrigin.Begin);
var entries = ImmutableList.CreateBuilder <PartitionEntry>();
for (int i = 0; i < _header.PartitionEntries; i++)
{
Guid typeId = new Guid(br.ReadBytes(16));
Guid entryId = new Guid(br.ReadBytes(16));
ulong firstLba = br.ReadUInt64();
ulong lastLba = br.ReadUInt64();
GptPartitionFlags flags = (GptPartitionFlags)br.ReadUInt64();
string name = Encoding.Unicode.GetString(br.ReadBytes(72));
long offset = (long)(firstLba * _sectorSize);
long length = (long)((lastLba - firstLba + 1) * _sectorSize);
long additionalBytes = _header.SizeOfPartitionEntry - 0x80;
if (additionalBytes > 0)
{
br.BaseStream.Seek(additionalBytes, SeekOrigin.Current);
}
if (typeId != Guid.Empty)
{
entries.Add(new GptPartitionEntry(typeId, entryId, flags, name, offset, length, new PartialStream(_container.Content, offset, length)));
}
}
return(entries.ToImmutableList());
}
