22 #define isalnum(c)	((__ismask(c)&(_U|_L|_D)) != 0)  argument
23 #define isalpha(c)	((__ismask(c)&(_U|_L)) != 0)  argument
24 #define iscntrl(c)	((__ismask(c)&(_C)) != 0)  argument
25 #define isdigit(c)	((__ismask(c)&(_D)) != 0)  argument
26 #define isgraph(c)	((__ismask(c)&(_P|_U|_L|_D)) != 0)  argument
27 #define islower(c)	((__ismask(c)&(_L)) != 0)  argument
28 #define isprint(c)	((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0)  argument
29 #define ispunct(c)	((__ismask(c)&(_P)) != 0)  argument
31 #define isspace(c)	((__ismask(c)&(_S)) != 0)  argument
32 #define isupper(c)	((__ismask(c)&(_U)) != 0)  argument
33 #define isxdigit(c)	((__ismask(c)&(_D|_X)) != 0)  argument
35 #define isascii(c) (((unsigned char)(c))<=0x7f)  argument
36 #define toascii(c) (((unsigned char)(c))&0x7f)  argument
38 static inline unsigned char __tolower(unsigned char c)  in __tolower()
45 static inline unsigned char __toupper(unsigned char c)  in __toupper()
52 #define tolower(c) __tolower(c)  argument
53 #define toupper(c) __toupper(c)  argument
59 static inline char _tolower(const char c)  in _tolower()