static int
__cmp(struct dt_dt_s stream, struct dt_dt_s cell)
{
/* special promoting/demoting version of dt_dtcmp()
* if CELL is d-only or t-only, demote STREAM */
if (dt_sandwich_only_d_p(cell)) {
return dt_dcmp(stream.d, cell.d);
} else if (dt_sandwich_only_t_p(cell)) {
return dt_tcmp(stream.t, cell.t);
}
return dt_dtcmp(stream, cell);
}
static int
__get_dir(struct dt_dt_s d, const struct dseq_clo_s *clo)
{
if (!dt_sandwich_only_t_p(d)) {
/* trial addition to to see where it goes */
struct dt_dt_s tmp = __seq_next(d, clo);
return dt_dtcmp(tmp, d);
}
if (clo->ite->dv > 0) {
return 1;
} else if (clo->ite->dv < 0) {
return -1;
}
return 0;
}