} //创建时间;
public virtual Stream GetStream(bool isReadOnly = true)
{
var part = this.GetParent <Partition>();
if (part == null)
{
Logger.WriteCallerLine($"{nameof(part)} can't be null!");
}
//若块组不为空,则取所有的块字段流;
if (BlockGroups != null)
{
if (part != null)
{
var blockSize = part.ClusterSize;
var partStream = part.GetStream();
//若块组不为空,则遍历块组组成虚拟流;
var ranges = BlockGroups.Select(p =>
ValueTuple.Create(
p.BlockAddress * blockSize,
p.Count * blockSize)).ToArray();
var blockSub = ranges.Sum(p => p.Item2) - Size;
if (ranges?.Count() > 0 && 0 < blockSub && blockSub < blockSize)
{
ranges[ranges.Count() - 1].Item2 -= blockSub;
}
var multiStream = MulPeriodsStream.CreateFromStream(partStream, ranges);
return(multiStream);
}
}
//否则直接取连续的流;
else
{
var blockSize = part.ClusterSize;
var partStream = part.GetStream();
if (partStream != null)
{
var fiStream = InterceptStream.CreateFromStream(partStream, StartLBA, Size);
//var buffer = new byte[128];
//var read = fiStream.Read(buffer, 0, buffer.Length);
return(fiStream);
}
}
return(null);
}
