/// <summary>Read data from the partition.</summary>
/// <param name="buffer"></param>
/// <param name="offset"></param>
/// <param name="count"></param>
/// <returns></returns>
public override int Read(byte[] buffer, int offset, int count)
{
int read = 0;
while (count > 0)
{
int positionCluster = checked ((int)(PositionField / NintendoOpticalDiscPartition.ClusterDataSize));
if (ClusterIndex != positionCluster)
{
ClusterData = Partition.ReadCluster(positionCluster);
ClusterIndex = positionCluster;
}
int clusterOffset = checked ((int)(PositionField - ClusterIndex * (long)NintendoOpticalDiscPartition.ClusterDataSize)); // Offset within the cluster.
int toRead = Math.Min(ClusterData.Length - clusterOffset, count);
ClusterData.CopyTo(clusterOffset, toRead, buffer, offset);
offset += toRead;
read += toRead;
PositionField += toRead;
count -= toRead;
}
return(read);
}
