Rotation with redundant slots

[DylanWangWQF]

Sorry, @fionser I closed the issue in SEAL. My question is: I want to get the exact number of slots in the ciphertext to get a cyclic rotation. Or implement the below rotations with redundant slots. For example, given a ctxt with 16 slots, (1, 2, 3, ..., 16). The expected rotationrotate(ctxt, -2) should be (3, ..., 16, 1, 2). But if we get a ctxt with 20 slots. Rotate it directly, we get (3, ..., 16, 0, 0, 0, 0, 1, 2), how can I get (3, ..., 16, 1, 2, 0, 0, 0, 0). I have to rotate the ctxt several times and make some additions?