internal Table(byte[] gptBuffer, uint bytesPerSector)
{
this.gptBuffer = gptBuffer;
var tempHeaderOffset = ByteOperations.FindAscii(gptBuffer, "EFI PART");
if (tempHeaderOffset == null)
{
throw new Exception("Bad GPT");
}
headerOffset = (uint)tempHeaderOffset;
headerSize = ByteOperations.ReadUInt32(gptBuffer, headerOffset + 0x0C);
tableOffset = headerOffset + 0x200;
FirstUsableSector = ByteOperations.ReadUInt64(gptBuffer, headerOffset + 0x28);
LastUsableSector = ByteOperations.ReadUInt64(gptBuffer, headerOffset + 0x30);
var maxPartitions = ByteOperations.ReadUInt32(gptBuffer, headerOffset + 0x50);
partitionEntrySize = ByteOperations.ReadUInt32(gptBuffer, headerOffset + 0x54);
tableSize = maxPartitions * partitionEntrySize;
if (tableOffset + tableSize > gptBuffer.Length)
{
throw new Exception("Bad GPT");
}
var partitionOffset = tableOffset;
uint number = 1;
while (partitionOffset < tableOffset + tableSize)
{
var name = ByteOperations.ReadUnicodeString(gptBuffer, partitionOffset + 0x38, 0x48)
.TrimEnd((char)0, ' ');
if (name.Length == 0)
{
break;
}
var partitionTypeGuid = ByteOperations.ReadGuid(gptBuffer, partitionOffset + 0x00);
var partitionType = PartitionType.FromGuid(partitionTypeGuid);
var currentPartition = new Partition(name, partitionType, bytesPerSector)
{
FirstSector = ByteOperations.ReadUInt64(gptBuffer, partitionOffset + 0x20),
LastSector = ByteOperations.ReadUInt64(gptBuffer, partitionOffset + 0x28),
Guid = ByteOperations.ReadGuid(gptBuffer, partitionOffset + 0x10),
Attributes = ByteOperations.ReadUInt64(gptBuffer, partitionOffset + 0x30)
};
Partitions.Add(currentPartition);
partitionOffset += partitionEntrySize;
number++;
}
}
private static Partition ToPartition(Disk disk, object partition)
{
string guid = (string)partition.GetPropertyValue("GptType");
var partitionType = guid != null?PartitionType.FromGuid(Guid.Parse(guid)) : null;
return(new Partition(disk)
{
Number = (uint)partition.GetPropertyValue("PartitionNumber"),
Id = (string)partition.GetPropertyValue("UniqueId"),
Letter = (char?)partition.GetPropertyValue("DriveLetter"),
PartitionType = partitionType,
});
}
private static WmiPartition ToWmiPartition(object partition)
{
var guid = (string)partition.GetPropertyValue("GptType");
var partitionType = guid != null?PartitionType.FromGuid(Guid.Parse(guid)) : null;
var driveLetter = (char)partition.GetPropertyValue("DriveLetter");
return(new WmiPartition
{
Number = (uint)partition.GetPropertyValue("PartitionNumber"),
UniqueId = (string)partition.GetPropertyValue("UniqueId"),
Guid = Guid.Parse((string)partition.GetPropertyValue("Guid")),
Root = driveLetter != 0 ? PathExtensions.GetRootPath(driveLetter) : null,
PartitionType = partitionType,
Size = new ByteSize(Convert.ToUInt64(partition.GetPropertyValue("Size"))),
});
}