LJ_CHAR_XDIGIT    229 lib_string.c     LJ_CHAR_UPPER,0,LJ_CHAR_ALNUM,LJ_CHAR_XDIGIT,0,0,0,0,0,0,0
LJ_CHAR_XDIGIT     29 lj_char.h      #define lj_char_isxdigit(c)	lj_char_isa((c), LJ_CHAR_XDIGIT)
LJ_CHAR_XDIGIT    368 lj_strscan.c   	base = 16, cmask = LJ_CHAR_XDIGIT, p += 2;