ctype - Character Type
[Miscelaneous]

Defines
#define	pj_hex_digits   "0123456789abcdef"
Functions
int	pj_isalnum (unsigned char c)
int	pj_isalpha (unsigned char c)
int	pj_isascii (unsigned char c)
int	pj_isdigit (unsigned char c)
int	pj_isspace (unsigned char c)
int	pj_islower (unsigned char c)
int	pj_isupper (unsigned char c)
int	pj_isblank (unsigned char c)
int	pj_tolower (unsigned char c)
int	pj_toupper (unsigned char c)
int	pj_isxdigit (unsigned char c)
void	pj_val_to_hex_digit (unsigned value, char *p)
unsigned	pj_hex_digit_to_val (unsigned char c)

---

Detailed Description

This module contains several inline functions/macros for testing or manipulating character types. It is provided in PJLIB because PJLIB must not depend to LIBC.

---

Define Documentation

#define pj_hex_digits   "0123456789abcdef"

Array of hex digits, in lowerspace.

Referenced by pj_val_to_hex_digit().

---

Function Documentation

unsigned pj_hex_digit_to_val

(

unsigned char

c

)

Convert hex digit c to integral value.

Parameters:

c

The hex digit character.

Returns:

The integral value between 0 and 15.

int pj_isalnum

(

unsigned char

c

)

Returns a non-zero value if either isalpha or isdigit is true for c.

Parameters:

c

The integer character to test.

Returns:

Non-zero value if either isalpha or isdigit is true for c.

int pj_isalpha

(

unsigned char

c

)

Returns a non-zero value if c is a particular representation of an alphabetic character.

Parameters:

c

The integer character to test.

Returns:

Non-zero value if c is a particular representation of an alphabetic character.

int pj_isascii

(

unsigned char

c

)

Returns a non-zero value if c is a particular representation of an ASCII character.

Parameters:

c

The integer character to test.

Returns:

Non-zero value if c is a particular representation of an ASCII character.

int pj_isblank

(

unsigned char

c

)

Returns a non-zero value if c is a either a space (' ') or horizontal tab ('\t') character.

Parameters:

c

The integer character to test.

Returns:

Non-zero value if c is a either a space (' ') or horizontal tab ('\t') character.

int pj_isdigit

(

unsigned char

c

)

Returns a non-zero value if c is a particular representation of a decimal-digit character.

Parameters:

c

The integer character to test.

Returns:

Non-zero value if c is a particular representation of a decimal-digit character.

int pj_islower

(

unsigned char

c

)

Returns a non-zero value if c is a particular representation of a lowercase character.

Parameters:

c

The integer character to test.

Returns:

Non-zero value if c is a particular representation of a lowercase character.

int pj_isspace

(

unsigned char

c

)

Returns a non-zero value if c is a particular representation of a space character (0x09 - 0x0D or 0x20).

Parameters:

c

The integer character to test.

Returns:

Non-zero value if c is a particular representation of a space character (0x09 - 0x0D or 0x20).

int pj_isupper

(

unsigned char

c

)

Returns a non-zero value if c is a particular representation of a uppercase character.

Parameters:

c

The integer character to test.

Returns:

Non-zero value if c is a particular representation of a uppercase character.

int pj_isxdigit

(

unsigned char

c

)

Returns a non-zero value if c is a particular representation of an hexadecimal digit character.

Parameters:

c

The integer character to test.

Returns:

Non-zero value if c is a particular representation of an hexadecimal digit character.

int pj_tolower

(

unsigned char

c

)

Converts character to lowercase.

Parameters:

c

The integer character to convert.

Returns:

Lowercase character of c.

int pj_toupper

(

unsigned char

c

)

Converts character to uppercase.

Parameters:

c

The integer character to convert.

Returns:

Uppercase character of c.

void pj_val_to_hex_digit	(	unsigned	value,
		char *	p
	)

Convert a value to hex representation.

Parameters:

	value	Integral value to convert.
	p	Buffer to hold the hex representation, which must be at least two bytes length.

References pj_hex_digits.