PSFP_BLOCK_ID
if (block_id == PSFP_BLOCK_ID) {
if (filter->block_id == PSFP_BLOCK_ID) {
if (filter->block_id != PSFP_BLOCK_ID) {
chain == 0 || filter->block_id == PSFP_BLOCK_ID) {
return PSFP_BLOCK_ID;
if (block_id == PSFP_BLOCK_ID) {