public int Read(byte[] buffer, int offset, int count)
{
int read = 0;
if (BasicStream != null) // not yet created
{
if (SyncPosition != null)
{
SyncPosition(_BasicStream);
}
if (BasicStream.Position < UnreadableHead)
{
BasicStream.Position = UnreadableHead;
}
if (CurrentPosition + count < AvaliableLength)
{
read = BasicStream.Read(buffer, offset, count);
}
else if (CurrentPosition < AvaliableLength)
{
read = BasicStream.Read(buffer, offset, (int)(AvaliableLength - CurrentPosition));
}
}
if (read < count)
{
// zero the end of the buffer
Array.Clear(buffer, offset + read, count - read);
read = count;
}
return(read);
}