public CookedDataRun(DataRun raw, long startVcn, long prevLcn, NonResidentAttributeRecord attributeExtent)
{
_raw = raw;
_startVcn = startVcn;
_startLcn = prevLcn + raw.RunOffset;
_attributeExtent = attributeExtent;
if (startVcn < 0)
{
throw new ArgumentOutOfRangeException("startVcn", startVcn, "VCN must be >= 0");
}
if (_startLcn < 0)
{
throw new ArgumentOutOfRangeException("prevLcn", prevLcn, "LCN must be >= 0");
}
}
protected override void Read(byte[] buffer, int offset, out int length)
{
_dataRuns = null;
base.Read(buffer, offset, out length);
_startingVCN = Utilities.ToUInt64LittleEndian(buffer, offset + 0x10);
_lastVCN = Utilities.ToUInt64LittleEndian(buffer, offset + 0x18);
_dataRunsOffset = Utilities.ToUInt16LittleEndian(buffer, offset + 0x20);
_compressionUnitSize = Utilities.ToUInt16LittleEndian(buffer, offset + 0x22);
_dataAllocatedSize = Utilities.ToUInt64LittleEndian(buffer, offset + 0x28);
_dataRealSize = Utilities.ToUInt64LittleEndian(buffer, offset + 0x30);
_initializedDataSize = Utilities.ToUInt64LittleEndian(buffer, offset + 0x38);
if ((Flags & (AttributeFlags.Compressed | AttributeFlags.Sparse)) != 0 && _dataRunsOffset > 0x40)
{
_compressedSize = Utilities.ToUInt64LittleEndian(buffer, offset + 0x40);
}
_dataRuns = new List<DataRun>();
int pos = _dataRunsOffset;
while (pos < length)
{
DataRun run = new DataRun();
int len = run.Read(buffer, offset + pos);
// Length 1 means there was only a header byte (i.e. terminator)
if (len == 1)
{
break;
}
_dataRuns.Add(run);
pos += len;
}
}
public override void ExpandToClusters(long numVirtualClusters, NonResidentAttributeRecord extent, bool allocate)
{
long totalVirtualClusters = _cookedRuns.NextVirtualCluster;
if (totalVirtualClusters < numVirtualClusters)
{
NonResidentAttributeRecord realExtent = extent;
if (realExtent == null)
{
realExtent = _cookedRuns.Last.AttributeExtent;
}
DataRun newRun = new DataRun(0, numVirtualClusters - totalVirtualClusters, true);
realExtent.DataRuns.Add(newRun);
_cookedRuns.Append(newRun, extent);
realExtent.LastVcn = numVirtualClusters - 1;
}
if (allocate)
{
AllocateClusters(totalVirtualClusters, (int)(numVirtualClusters - totalVirtualClusters));
}
}
public void InsertRun(int index, DataRun newRun)
{
_dataRuns.Insert(index, newRun);
}
public void InsertRun(DataRun existingRun, DataRun newRun)
{
int idx = _dataRuns.IndexOf(existingRun);
if (idx < 0)
{
throw new ArgumentException("Attempt to replace non-existant run", "existingRun");
}
_dataRuns.Insert(idx + 1, newRun);
}
public int RemoveRun(DataRun run)
{
int idx = _dataRuns.IndexOf(run);
if (idx < 0)
{
throw new ArgumentException("Attempt to remove non-existant run", "run");
}
_dataRuns.RemoveAt(idx);
return idx;
}
public void ReplaceRun(DataRun oldRun, DataRun newRun)
{
int idx = _dataRuns.IndexOf(oldRun);
if (idx < 0)
{
throw new ArgumentException("Attempt to replace non-existant run", "oldRun");
}
_dataRuns[idx] = newRun;
}
public void Append(DataRun rawRun, NonResidentAttributeRecord attributeExtent)
{
CookedDataRun last = Last;
_runs.Add(new CookedDataRun(rawRun, NextVirtualCluster, last == null ? 0 : last.StartLcn, attributeExtent));
}
