ctype.h File Reference

The C type definitions. More...

Go to the source code of this file.

Defines
#define	_islower(c)   ('a' <= (c) && (c) <= 'z')
#define	_isupper(c)   ('A' <= (c) && (c) <= 'Z')
#define	_isdigit(c)   ('0' <= (c) && (c) <= '9')
#define	_isalpha(c)   (_islower(c) || _isupper(c))
#define	_toupper(c)   (_islower((c)) ? ((c)-32) : (c))
#define	_tolower(c)   (_isupper((c)) ? ((c)+32) : (c))
Functions
int	islower (int c)
int	isupper (int c)
int	isdigit (int c)
int	isalpha (int c)
int	toupper (int c)
int	tolower (int c)
int	isalnum (int c)

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Detailed Description

The C type definitions.

Definition in file ctype.h.

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Define Documentation

#define _isalpha

(

c

)

(_islower(c) || _isupper(c))

Definition at line 22 of file ctype.h.

#define _isdigit

(

c

)

('0' <= (c) && (c) <= '9')

Definition at line 21 of file ctype.h.

#define _islower

(

c

)

('a' <= (c) && (c) <= 'z')

Definition at line 19 of file ctype.h.

#define _isupper

(

c

)

('A' <= (c) && (c) <= 'Z')

Definition at line 20 of file ctype.h.

#define _tolower

(

c

)

(_isupper((c)) ? ((c)+32) : (c))

Definition at line 24 of file ctype.h.

#define _toupper

(

c

)

(_islower((c)) ? ((c)-32) : (c))

Definition at line 23 of file ctype.h.

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Function Documentation

int isalnum

(

int

c

)

int isalpha

(

int

c

)

int isdigit

(

int

c

)

int islower

(

int

c

)

int isupper

(

int

c

)

int tolower

(

int

c

)

int toupper

(

int

c

)