internal void RemoveAttributeExtents(NtfsAttribute attr)
{
attr.GetDataBuffer().SetCapacity(0);
foreach (var extentRef in attr.Extents.Keys)
{
RemoveAttributeExtent(extentRef);
}
}
public void Delete()
{
if (_records[0].HardLinkCount != 0)
{
throw new InvalidOperationException("Attempt to delete in-use file: " + ToString());
}
_context.ForgetFile(this);
NtfsStream objIdStream = GetStream(AttributeType.ObjectId, null);
if (objIdStream != null)
{
ObjectId objId = objIdStream.GetContent <ObjectId>();
Context.ObjectIds.Remove(objId.Id);
}
// Truncate attributes, allowing for truncation silently removing the AttributeList attribute
// in some cases (large file with all attributes first extent in the first MFT record). This
// releases all allocated clusters in most cases.
List <NtfsAttribute> truncateAttrs = new List <NtfsAttribute>(_attributes.Count);
foreach (var attr in _attributes)
{
if (attr.Type != AttributeType.AttributeList)
{
truncateAttrs.Add(attr);
}
}
foreach (NtfsAttribute attr in truncateAttrs)
{
attr.GetDataBuffer().SetCapacity(0);
}
// If the attribute list record remains, free any possible clusters it owns. We've now freed
// all clusters.
NtfsAttribute attrList = GetAttribute(AttributeType.AttributeList, null);
if (attrList != null)
{
attrList.GetDataBuffer().SetCapacity(0);
}
// Now go through the MFT records, freeing them up
foreach (var mftRecord in _records)
{
_context.Mft.RemoveRecord(mftRecord.Reference);
}
_attributes.Clear();
_records.Clear();
}
internal void MakeAttributeNonResident(AttributeReference attrRef, int maxData)
{
NtfsAttribute attr = GetAttribute(attrRef);
if (attr.IsNonResident)
{
throw new InvalidOperationException("Attribute is already non-resident");
}
ushort id = _records[0].CreateNonResidentAttribute(attr.Type, attr.Name, attr.Flags);
AttributeRecord newAttrRecord = _records[0].GetAttribute(id);
IBuffer attrBuffer = attr.GetDataBuffer();
byte[] tempData = Utilities.ReadFully(attrBuffer, 0, (int)Math.Min(maxData, attrBuffer.Capacity));
RemoveAttributeExtents(attr);
attr.SetExtent(_records[0].Reference, newAttrRecord);
attr.GetDataBuffer().Write(0, tempData, 0, tempData.Length);
UpdateAttributeList();
}