_D                 22 include/linux/ctype.h #define isalnum(c)	((__ismask(c)&(_U|_L|_D)) != 0)
_D                 25 include/linux/ctype.h #define isdigit(c)	((__ismask(c)&(_D)) != 0)
_D                 26 include/linux/ctype.h #define isgraph(c)	((__ismask(c)&(_P|_U|_L|_D)) != 0)
_D                 28 include/linux/ctype.h #define isprint(c)	((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0)
_D                 33 include/linux/ctype.h #define isxdigit(c)	((__ismask(c)&(_D|_X)) != 0)