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);
}
}
}
private void WriteIndexRecord(long recordIndex, IndexRecord indexRecord)
{
long sectorsPerIndexRecord = m_rootRecord.BytesPerIndexRecord / m_volume.BytesPerSector;
long sectorIndex = recordIndex * sectorsPerIndexRecord;
m_indexAllocationData.WriteSectors(sectorIndex, indexRecord.GetBytes((int)m_rootRecord.BytesPerIndexRecord, true));
}
