int get_simple_switch_block_track(enum e_side from_side, enum e_side to_side, int from_track, enum e_switch_block_type switch_block_type, int nodes_per_chan)
struct s_ivec get_switch_box_tracks(INP int from_i, INP int from_j, INP int from_track, INP t_rr_type from_type, INP int to_i, INP int to_j, INP t_rr_type to_type, INP struct s_ivec ***switch_block_conn)