public FileRecord GetFileRecord(long baseSegmentNumber)
{
FileRecordSegment baseRecordSegment = GetFileRecordSegment(baseSegmentNumber);
if (baseRecordSegment != null && baseRecordSegment.IsBaseFileRecord)
{
AttributeRecord attributeListRecord = baseRecordSegment.GetImmediateAttributeRecord(AttributeType.AttributeList);
if (attributeListRecord == null)
{
return(new FileRecord(baseRecordSegment));
}
else
{
// The attribute list contains entries for every attribute the record has (excluding the attribute list),
// including attributes that reside within the base record segment.
AttributeListRecord attributeList = new AttributeListRecord(m_volume, attributeListRecord);
List <MftSegmentReference> references = attributeList.GetSegmentReferenceList();
int baseSegmentIndex = MftSegmentReference.IndexOfSegmentNumber(references, baseSegmentNumber);
if (baseSegmentIndex >= 0)
{
references.RemoveAt(baseSegmentIndex);
}
List <FileRecordSegment> recordSegments = new List <FileRecordSegment>();
// we want the base record segment first
recordSegments.Add(baseRecordSegment);
foreach (MftSegmentReference reference in references)
{
FileRecordSegment segment = GetFileRecordSegment(reference);
if (segment != null)
{
recordSegments.Add(segment);
}
else
{
// record is invalid
return(null);
}
}
return(new FileRecord(recordSegments));
}
}
else
{
return(null);
}
}
private FileRecord ReadMftRecord()
{
NTFSBootRecord bootRecord = m_volume.BootRecord;
if (bootRecord != null)
{
long mftStartLCN;
if (m_useMftMirror)
{
mftStartLCN = (long)bootRecord.MftMirrorStartLCN;
}
else
{
mftStartLCN = (long)bootRecord.MftStartLCN;
}
FileRecordSegment mftRecordSegment = GetRecordSegmentOfMasterFileTable(mftStartLCN, MasterFileTableSegmentNumber);
if (!mftRecordSegment.IsBaseFileRecord)
{
return(null);
}
AttributeRecord attributeListRecord = mftRecordSegment.GetImmediateAttributeRecord(AttributeType.AttributeList);
if (attributeListRecord == null)
{
return(new FileRecord(mftRecordSegment));
}
else
{
// I have never personally seen an MFT with an attribute list
AttributeListRecord attributeList = new AttributeListRecord(m_volume, attributeListRecord);
List <MftSegmentReference> references = attributeList.GetSegmentReferenceList();
int baseSegmentIndex = MftSegmentReference.IndexOfSegmentNumber(references, MasterFileTableSegmentNumber);
if (baseSegmentIndex >= 0)
{
references.RemoveAt(baseSegmentIndex);
}
List <FileRecordSegment> recordSegments = new List <FileRecordSegment>();
// we want the base record segment first
recordSegments.Add(mftRecordSegment);
foreach (MftSegmentReference reference in references)
{
FileRecordSegment segment = GetRecordSegmentOfMasterFileTable(mftStartLCN, reference);
if (segment != null)
{
recordSegments.Add(segment);
}
else
{
// MFT is invalid
return(null);
}
}
return(new FileRecord(recordSegments));
}
}
else
{
return(null);
}
}