/// <summary><inheritDoc/></summary>
public virtual int Get(long position, byte[] bytes, int off, int len)
{
GroupedRandomAccessSource.SourceEntry entry = GetSourceEntryForOffset(position);
// if true, we have run out of data to read from
if (entry == null)
{
return(-1);
}
long offN = entry.OffsetN(position);
int remaining = len;
while (remaining > 0)
{
// if true, we have run out of data to read from
if (entry == null)
{
break;
}
if (offN > entry.source.Length())
{
break;
}
int count = entry.source.Get(offN, bytes, off, remaining);
if (count == -1)
{
break;
}
off += count;
position += count;
remaining -= count;
offN = 0;
entry = GetSourceEntryForOffset(position);
}
return(remaining == len ? -1 : len - remaining);
}
// by default, do nothing
/// <summary>
/// <inheritDoc/>
/// The source that contains the byte at position is retrieved, the correct offset into that source computed, then the value
/// from that offset in the underlying source is returned.
/// </summary>
public virtual int Get(long position)
{
GroupedRandomAccessSource.SourceEntry entry = GetSourceEntryForOffset(position);
// if true, we have run out of data to read from
if (entry == null)
{
return(-1);
}
return(entry.source.Get(entry.OffsetN(position)));
}