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