__PBM_NBITS 30 lib/popt/poptint.h #define __PBM_IX(d) ((d) / __PBM_NBITS) __PBM_NBITS 31 lib/popt/poptint.h #define __PBM_MASK(d) ((__pbm_bits) 1 << (((unsigned)(d)) % __PBM_NBITS))