public void WriteSectors(long firstSectorIndex, byte[] data)
{
if (m_attributeRecord is NonResidentAttributeRecord)
{
NonResidentAttributeData attributeData = new NonResidentAttributeData(m_volume, m_fileRecord, (NonResidentAttributeRecord)m_attributeRecord);
attributeData.WriteSectors(firstSectorIndex, data);
}
else
{
byte[] recordData = ((ResidentAttributeRecord)m_attributeRecord).Data;
long totalSectors = (long)Math.Ceiling((double)recordData.Length / m_volume.BytesPerSector);
long highestSectorIndex = Math.Max(totalSectors - 1, 0);
if (firstSectorIndex < 0 || firstSectorIndex > highestSectorIndex)
{
throw new ArgumentOutOfRangeException("firstSectorIndex is not within the valid range");
}
int offset = (int)firstSectorIndex * m_volume.BytesPerSector;
int bytesToWrite;
if (offset + data.Length <= recordData.Length)
{
bytesToWrite = data.Length;
}
else
{
bytesToWrite = recordData.Length - offset;
}
ByteWriter.WriteBytes(recordData, offset, data, bytesToWrite);
if (m_fileRecord != null)
{
m_volume.UpdateFileRecord(m_fileRecord);
}
}
}
public override void SetAttributes(string path, bool?isHidden, bool?isReadonly, bool?isArchived)
{
FileRecord record = m_volume.GetFileRecord(path);
if (record != null)
{
if (isHidden.HasValue)
{
if (isHidden.Value)
{
record.StandardInformation.FileAttributes |= FileAttributes.Hidden;
}
else
{
record.StandardInformation.FileAttributes &= ~FileAttributes.Hidden;
}
}
if (isReadonly.HasValue)
{
if (isReadonly.Value)
{
record.StandardInformation.FileAttributes |= FileAttributes.Readonly;
}
else
{
record.StandardInformation.FileAttributes &= ~FileAttributes.Readonly;
}
}
if (isArchived.HasValue)
{
if (isArchived.Value)
{
record.StandardInformation.FileAttributes |= FileAttributes.Archive;
}
else
{
record.StandardInformation.FileAttributes &= ~FileAttributes.Archive;
}
}
record.StandardInformation.MftModificationTime = DateTime.Now;
m_volume.UpdateFileRecord(record);
}
}
private void UpdateFileNameRecords()
{
List <FileNameRecord> fileNameRecords = m_fileRecord.FileNameRecords;
foreach (FileNameRecord fileNameRecord in fileNameRecords)
{
fileNameRecord.AllocatedLength = this.Data.AllocatedLength;
fileNameRecord.FileSize = this.Data.Length;
}
m_volume.UpdateFileRecord(m_fileRecord);
// Update directory index
MftSegmentReference parentDirectory = m_fileRecord.ParentDirectoryReference;
FileRecord parentDirectoryRecord = m_volume.GetFileRecord(parentDirectory);
IndexData parentDirectoryIndex = new IndexData(m_volume, parentDirectoryRecord, AttributeType.FileName);
foreach (FileNameRecord fileNameRecord in fileNameRecords)
{
parentDirectoryIndex.UpdateFileNameRecord(fileNameRecord);
}
}
public void AddEntry(MftSegmentReference fileReference, byte[] key)
{
IndexEntry entry = new IndexEntry();
entry.FileReference = fileReference;
entry.Key = key;
if (!m_rootRecord.IsParentNode)
{
int insertIndex = CollationHelper.FindIndexForSortedInsert(m_rootRecord.IndexEntries, key, m_rootRecord.CollationRule);
m_rootRecord.IndexEntries.Insert(insertIndex, entry);
if (m_rootRecord.RecordLength >= m_volume.AttributeRecordLengthToMakeNonResident)
{
if (m_indexAllocationRecord == null)
{
m_indexAllocationRecord = (IndexAllocationRecord)m_fileRecord.CreateAttributeRecord(AttributeType.IndexAllocation, m_indexName);
m_indexAllocationData = new NonResidentAttributeData(m_volume, m_fileRecord, m_indexAllocationRecord);
m_bitmapRecord = m_fileRecord.CreateAttributeRecord(AttributeType.Bitmap, m_indexName);
m_bitmapData = new BitmapData(m_volume, m_fileRecord, m_bitmapRecord, 0);
}
SplitRootIndexRecord();
}
else
{
m_volume.UpdateFileRecord(m_fileRecord);
}
}
else
{
KeyValuePairList <int, IndexRecord> path = FindInsertPath(key);
IndexRecord leafRecord = path[path.Count - 1].Value;
long leafRecordVBN = leafRecord.RecordVBN;
int insertIndex = CollationHelper.FindIndexForSortedInsert(leafRecord.IndexEntries, key, m_rootRecord.CollationRule);
leafRecord.IndexEntries.Insert(insertIndex, entry);
long leafRecordIndex = ConvertToRecordIndex(leafRecordVBN);
if (leafRecord.DoesFit((int)m_rootRecord.BytesPerIndexRecord))
{
WriteIndexRecord(leafRecordIndex, leafRecord);
}
else
{
// Split index record
SplitIndexRecord(path);
}
}
}
public override FileSystemEntry CreateFile(string path)
{
string streamName = GetStreamName(path);
path = GetFilePath(path);
string parentDirectoryName = Path.GetDirectoryName(path);
string fileName = Path.GetFileName(path);
FileRecord parentDirectoryRecord = m_volume.GetFileRecord(parentDirectoryName);
FileRecord fileRecord = null;
if (streamName == String.Empty)
{
fileRecord = m_volume.CreateFile(parentDirectoryRecord.BaseSegmentReference, fileName, false);
}
else
{
try
{
fileRecord = m_volume.GetFileRecord(path);
}
catch (FileNotFoundException)
{
}
if (fileRecord == null)
{
fileRecord = m_volume.CreateFile(parentDirectoryRecord.BaseSegmentReference, fileName, false);
}
else
{
// We might need to allocate an additional FileRecordSegment so we have to make sure we can extend the MFT if it is full
if (m_volume.NumberOfFreeClusters < m_volume.NumberOfClustersRequiredToExtendMft)
{
throw new DiskFullException();
}
}
fileRecord.CreateAttributeRecord(AttributeType.Data, streamName);
m_volume.UpdateFileRecord(fileRecord);
}
return(ToFileSystemEntry(path, fileRecord));
}
public void WriteSectors(long firstSectorIndex, byte[] data)
{
int sectorCount;
long lastSectorIndexToWrite;
long lastClusterVCNToWrite;
int bytesPerSector = m_volume.BytesPerSector;
int sectorsPerCluster = m_volume.SectorsPerCluster;
ulong firstBytePosition = (ulong)firstSectorIndex * (uint)bytesPerSector;
ulong nextBytePosition = firstBytePosition + (uint)data.Length;
if (data.Length % bytesPerSector > 0)
{
int paddedLength = (int)Math.Ceiling((double)data.Length / bytesPerSector) * bytesPerSector;
// last sector could be partial, we must zero-fill it before write
sectorCount = paddedLength / bytesPerSector;
lastSectorIndexToWrite = firstSectorIndex + sectorCount - 1;
lastClusterVCNToWrite = lastSectorIndexToWrite / sectorsPerCluster;
if (lastClusterVCNToWrite == HighestVCN)
{
byte[] paddedData = new byte[paddedLength];
Array.Copy(data, paddedData, data.Length);
data = paddedData;
}
else
{
// only the last sector can be partial
throw new ArgumentException("Cannot write partial sector");
}
}
else
{
sectorCount = data.Length / bytesPerSector;
lastSectorIndexToWrite = firstSectorIndex + sectorCount - 1;
lastClusterVCNToWrite = lastSectorIndexToWrite / sectorsPerCluster;
}
long firstClusterVCN = firstSectorIndex / sectorsPerCluster;
if (firstClusterVCN < LowestVCN || lastClusterVCNToWrite > HighestVCN)
{
string message = String.Format("Cluster VCN {0}-{1} is not within the valid range ({2}-{3})", firstClusterVCN, lastClusterVCNToWrite, LowestVCN, HighestVCN);
throw new ArgumentOutOfRangeException(message);
}
if (firstBytePosition > ValidDataLength)
{
// We need to zero-fill all the the bytes up to ValidDataLength
long firstSectorIndexToFill = (long)(ValidDataLength / (uint)bytesPerSector);
int transferSizeInSectors = Settings.MaximumTransferSizeLBA;
for (long sectorIndexToFill = firstSectorIndexToFill; sectorIndexToFill < firstSectorIndex; sectorIndexToFill += transferSizeInSectors)
{
int sectorsToWrite = (int)Math.Min(transferSizeInSectors, firstSectorIndex - firstSectorIndexToFill);
byte[] fillData = new byte[sectorsToWrite * bytesPerSector];
if (sectorIndexToFill == firstSectorIndexToFill)
{
int bytesToRetain = (int)(ValidDataLength % (uint)bytesPerSector);
if (bytesToRetain > 0)
{
byte[] dataToRetain = ReadSectors(firstSectorIndexToFill, 1);
Array.Copy(dataToRetain, 0, fillData, 0, bytesToRetain);
}
}
WriteSectors(sectorIndexToFill, fillData);
}
}
KeyValuePairList <long, int> sequence = m_attributeRecord.DataRunSequence.TranslateToLBN(firstSectorIndex, sectorCount, sectorsPerCluster);
long bytesWritten = 0;
foreach (KeyValuePair <long, int> run in sequence)
{
byte[] sectors = new byte[run.Value * bytesPerSector];
Array.Copy(data, bytesWritten, sectors, 0, sectors.Length);
m_volume.WriteSectors(run.Key, sectors, m_contentType);
bytesWritten += sectors.Length;
}
if (nextBytePosition > ValidDataLength)
{
m_attributeRecord.ValidDataLength = nextBytePosition;
if (m_fileRecord != null)
{
m_volume.UpdateFileRecord(m_fileRecord);
}
}
}
