172   int Ss, Se, Ah, Al;  in validate_script()  local
187   if (scanptr->Ss != 0 || scanptr->Se != DCTSIZE2-1) {  in validate_script()
217     Ss = scanptr->Ss;  in validate_script()
235       if (Ss < 0 || Ss >= DCTSIZE2 || Se < Ss || Se >= DCTSIZE2 ||  in validate_script()
238       if (Ss == 0) {  in validate_script()
247         if (Ss != 0 && last_bitpos_ptr[0] < 0) /* AC without prior DC scan */  in validate_script()
249         for (coefi = Ss; coefi <= Se; coefi++) {  in validate_script()
265       if (Ss != 0 || Se != DCTSIZE2-1 || Ah != 0 || Al != 0)  in validate_script()
318     cinfo->Ss = scanptr->Ss;  in select_scan_parameters()
334     cinfo->Ss = 0;  in select_scan_parameters()
471     if (cinfo->Ss != 0 || cinfo->Ah == 0 || cinfo->arith_code) {  in prepare_for_pass()