public void WriteDataClusters(NTFSVolume volume, long firstClusterVCN, byte[] data)
{
int count;
long lastClusterVcnToWrite;
if (data.Length % volume.BytesPerCluster > 0)
{
int paddedLength = (int)Math.Ceiling((double)data.Length / volume.BytesPerCluster) * volume.BytesPerCluster;
// last cluster could be partial, we must zero-fill it before write
count = paddedLength / volume.BytesPerCluster;
lastClusterVcnToWrite = firstClusterVCN + count - 1;
if (lastClusterVcnToWrite == HighestVCN)
{
byte[] temp = new byte[paddedLength];
Array.Copy(data, temp, data.Length);
data = temp;
}
else
{
// only the last cluster can be partial
throw new ArgumentException("Cannot write partial cluster");
}
}
else
{
count = data.Length / volume.BytesPerCluster;
lastClusterVcnToWrite = firstClusterVCN + count - 1;
}
if (firstClusterVCN < LowestVCN || lastClusterVcnToWrite > HighestVCN)
{
string message = String.Format("Cluster VCN {0}-{1} is not within the valid range ({2}-{3})", firstClusterVCN, firstClusterVCN + count, LowestVCN, HighestVCN);
throw new ArgumentOutOfRangeException(message);
}
KeyValuePairList <long, int> sequence = m_dataRunSequence.TranslateToLCN(firstClusterVCN, count);
long bytesWritten = 0;
foreach (KeyValuePair <long, int> run in sequence)
{
byte[] clusters = new byte[run.Value * volume.BytesPerCluster];
Array.Copy(data, bytesWritten, clusters, 0, clusters.Length);
volume.WriteClusters(run.Key, clusters);
bytesWritten += clusters.Length;
}
}