STRSCAN_DMASK      68 lj_strscan.c   #define DNEXT(a)	(((a)+1) & STRSCAN_DMASK)
STRSCAN_DMASK      69 lj_strscan.c   #define DPREV(a)	(((a)-1) & STRSCAN_DMASK)
STRSCAN_DMASK      70 lj_strscan.c   #define DLEN(lo, hi)	((int32_t)(((lo)-(hi)) & STRSCAN_DMASK))