/// <summary>
/// Copy <code>src[srcPos:srcPos+len]</code> into
/// <code>dest[destPos:destPos+len]</code> using at most <code>mem</code>
/// bytes.
/// </summary>
public static void Copy(Reader src, int srcPos, Mutable dest, int destPos, int len, int mem)
{
Debug.Assert(srcPos + len <= src.Size());
Debug.Assert(destPos + len <= dest.Size());
int capacity = (int)((uint)mem >> 3);
if (capacity == 0)
{
for (int i = 0; i < len; ++i)
{
dest.Set(destPos++, src.Get(srcPos++));
}
}
else if (len > 0)
{
// use bulk operations
long[] buf = new long[Math.Min(capacity, len)];
Copy(src, srcPos, dest, destPos, len, buf);
}
}