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Macros
#define	isascii(c) ((unsigned int)(c) <= 127)

#define	toascii(c) ((unsigned char)(c) & 127)

#define	isblank(c) ((c == ' ') \|\| (c == '\t'))

#define	_U 0x01

#define	_L 0x02

#define	_N 0x04

#define	_S 0x08

#define	_P 0x10

#define	_C 0x20

#define	_X 0x40

#define	_B 0x80

#define	isalpha(c) (look_ctype_table((unsigned int)(c)) & (_U\|_L))

#define	isupper(c) (look_ctype_table((unsigned int)(c)) & (_U))

#define	islower(c) (look_ctype_table((unsigned int)(c)) & (_L))

#define	isdigit(c) (look_ctype_table((unsigned int)(c)) & (_N))

#define	isxdigit(c) (look_ctype_table((unsigned int)(c)) & (_X\|_N))

#define	isspace(c) (look_ctype_table((unsigned int)(c)) & (_S))

#define	ispunct(c) (look_ctype_table((unsigned int)(c)) & (_P))

#define	isalnum(c) (look_ctype_table((unsigned int)(c)) & (_U\|_L\|_N))

#define	isprint(c) (look_ctype_table((unsigned int)(c)) & (_P\|_U\|_L\|_N\|_B))

#define	isgraph(c) (look_ctype_table((unsigned int)(c)) & (_P\|_U\|_L\|_N))

#define	iscntrl(c) (look_ctype_table((unsigned int)(c)) & (_C))

#define	toupper(c) _toupper(c)

#define	tolower(c) _tolower(c)