sc_vtb_erase
sc_vtb_erase(&sc->cur_scp->scr,
sc_vtb_erase(&sc->cur_scp->scr,
sc_vtb_erase(&scp->vtb, scp->cursor_pos, n,
sc_vtb_erase(&scp->vtb, r->tr_begin.tp_row * scp->xsize,
sc_vtb_erase(&scp->vtb, r->tr_begin.tp_row *
sc_vtb_erase(&scp->vtb, scp->cursor_pos, n, ch, attr);
sc_vtb_erase(&scp->vtb, scp->cursor_pos + count, n, ch, attr);
sc_vtb_erase(&scp->vtb, scp->cursor_pos,
sc_vtb_erase(&scp->vtb, 0, scp->cursor_pos + 1, ch, attr);
sc_vtb_erase(&scp->vtb, 0, scp->xsize*scp->ysize, ch, attr);
sc_vtb_erase(&scp->vtb, scp->cursor_pos,
sc_vtb_erase(&scp->vtb, scp->cursor_pos - scp->xpos,
sc_vtb_erase(&scp->vtb, scp->cursor_pos - scp->xpos,
void sc_vtb_erase(sc_vtb_t *vtb, int at, int count, int c, int attr);