/* * NOTE! This ctype does not handle EOF like the standard C * library is required to. */#define _U	0x01	/* upper */#define _L	0x02	/* lower */#define _D	0x04	/* digit */#define _C	0x08	/* cntrl */#define _P	0x10	/* punct */#define _S	0x20	/* white space (space/lf/tab) */#define _X	0x40	/* hex digit */#define _SP	0x80	/* hard space (0x20) */extern unsigned char _ctype[];#define __ismask(x) (_ctype[(int)(unsigned char)(x)])#define isalnum(c)	((__ismask(c)&(_U|_L|_D)) != 0)#define isalpha(c)	((__ismask(c)&(_U|_L)) != 0)#define iscntrl(c)	((__ismask(c)&(_C)) != 0)#define isdigit(c)	((__ismask(c)&(_D)) != 0)#define isgraph(c)	((__ismask(c)&(_P|_U|_L|_D)) != 0)#define islower(c)	((__ismask(c)&(_L)) != 0)#define isprint(c)	((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0)#define ispunct(c)	((__ismask(c)&(_P)) != 0)#define isspace(c)	((__ismask(c)&(_S)) != 0)#define isupper(c)	((__ismask(c)&(_U)) != 0)#define isxdigit(c)	((__ismask(c)&(_D|_X)) != 0)#define isascii(c) (((unsigned char)(c))<=0x7f)#define toascii(c) (((unsigned char)(c))&0x7f)static inline unsigned char __tolower(unsigned char c){	if (isupper(c))		c -= 'A'-'a';	return c;}static inline unsigned char __toupper(unsigned char c){	if (islower(c))		c -= 'a'-'A';	return c;}#define tolower(c) __tolower(c)#define toupper(c) __toupper(c)