Characters

Detailed Description

Lookup tables are used to reduce branching and improve performance when parsing and processing characters.

Data Structures
struct	reduct_char_info_t
struct	reduct_char_info
	Character information. More...

Macros
#define	REDUCT_CHAR_FLAGS(_c)   (reductCharTable[(unsigned char)(_c)].flags)
	Get the character flags for a given character.
#define	REDUCT_CHAR_TO_LOWER(_c)   (reductCharTable[(unsigned char)(_c)].lower)
	Get the lowercase equivalent of a character.
#define	REDUCT_CHAR_TO_UPPER(_c)   (reductCharTable[(unsigned char)(_c)].upper)
	Get the uppercase equivalent of a character.
#define	REDUCT_CHAR_IS_WHITESPACE(_c)   (REDUCT_CHAR_FLAGS(_c) & REDUCT_CHAR_WHITESPACE)
	Check if a character is whitespace.
#define	REDUCT_CHAR_IS_LETTER(_c)   (REDUCT_CHAR_FLAGS(_c) & REDUCT_CHAR_LETTER)
	Check if a character is a letter.
#define	REDUCT_CHAR_IS_DIGIT(_c)   (REDUCT_CHAR_FLAGS(_c) & REDUCT_CHAR_DIGIT)
	Check if a character is a decimal digit.
#define	REDUCT_CHAR_IS_SYMBOL(_c)   (REDUCT_CHAR_FLAGS(_c) & REDUCT_CHAR_SYMBOL)
	Check if a character is a symbol.
#define	REDUCT_CHAR_IS_HEX_DIGIT(_c)   (REDUCT_CHAR_FLAGS(_c) & REDUCT_CHAR_HEX_DIGIT)
	Check if a character is a hexidecimal digit.

Enumerations
enum	reduct_char_flags_t {   REDUCT_CHAR_LETTER = (1 << 0) , REDUCT_CHAR_DIGIT = (1 << 1) , REDUCT_CHAR_SYMBOL = (1 << 2) , REDUCT_CHAR_WHITESPACE = (1 << 3) ,   REDUCT_CHAR_HEX_DIGIT = (1 << 4) }
	Character classification flags. More...

Variables
reduct_char_info_t	reductCharTable [256]
	Global character lookup table.

Macro Definition Documentation

REDUCT_CHAR_FLAGS

#define REDUCT_CHAR_FLAGS

(

_c

)

(reductCharTable[(unsigned char)(_c)].flags)

Get the character flags for a given character.

Parameters

_c	The character to get flags for.

Returns

The character flags.

Definition at line 54 of file char.h.

REDUCT_CHAR_TO_LOWER

#define REDUCT_CHAR_TO_LOWER

(

_c

)

(reductCharTable[(unsigned char)(_c)].lower)

Get the lowercase equivalent of a character.

Parameters

_c	The character to get the lowercase equivalent of.

Returns

The lowercase equivalent of the character.

Definition at line 62 of file char.h.

REDUCT_CHAR_TO_UPPER

#define REDUCT_CHAR_TO_UPPER

(

_c

)

(reductCharTable[(unsigned char)(_c)].upper)

Get the uppercase equivalent of a character.

Parameters

_c	The character to get the uppercase equivalent of.

Returns

The uppercase equivalent of the character.

Definition at line 70 of file char.h.

REDUCT_CHAR_IS_WHITESPACE

#define REDUCT_CHAR_IS_WHITESPACE

(

_c

)

(REDUCT_CHAR_FLAGS(_c) & REDUCT_CHAR_WHITESPACE)

Check if a character is whitespace.

Parameters

_c	The character to check.

Returns

REDUCT_TRUE if the character is whitespace, REDUCT_FALSE otherwise.

Definition at line 78 of file char.h.

REDUCT_CHAR_IS_LETTER

#define REDUCT_CHAR_IS_LETTER

(

_c

)

(REDUCT_CHAR_FLAGS(_c) & REDUCT_CHAR_LETTER)

Check if a character is a letter.

Parameters

_c	The character to check.

Returns

REDUCT_TRUE if the character is a letter, REDUCT_FALSE otherwise.

Definition at line 86 of file char.h.

REDUCT_CHAR_IS_DIGIT

#define REDUCT_CHAR_IS_DIGIT

(

_c

)

(REDUCT_CHAR_FLAGS(_c) & REDUCT_CHAR_DIGIT)

Check if a character is a decimal digit.

Parameters

_c	The character to check.

Returns

REDUCT_TRUE if the character is a decimal digit, REDUCT_FALSE otherwise.

Definition at line 94 of file char.h.

REDUCT_CHAR_IS_SYMBOL

#define REDUCT_CHAR_IS_SYMBOL

(

_c

)

(REDUCT_CHAR_FLAGS(_c) & REDUCT_CHAR_SYMBOL)

Check if a character is a symbol.

Parameters

_c	The character to check.

Returns

REDUCT_TRUE if the character is a symbol, REDUCT_FALSE otherwise.

Definition at line 102 of file char.h.

REDUCT_CHAR_IS_HEX_DIGIT

#define REDUCT_CHAR_IS_HEX_DIGIT

(

_c

)

(REDUCT_CHAR_FLAGS(_c) & REDUCT_CHAR_HEX_DIGIT)

Check if a character is a hexidecimal digit.

Parameters

_c	The character to check.

Returns

REDUCT_TRUE if the character is a hexidecimal digit, REDUCT_FALSE otherwise.

Definition at line 110 of file char.h.

Enumeration Type Documentation

reduct_char_flags_t

enum reduct_char_flags_t

Character classification flags.

Follows the grammar defined in the README.

Enumerator
REDUCT_CHAR_LETTER	Is a letter.
REDUCT_CHAR_DIGIT	Is a decimal digit.
REDUCT_CHAR_SYMBOL	Is a symbol.
REDUCT_CHAR_WHITESPACE	Is whitespace.
REDUCT_CHAR_HEX_DIGIT	Is a hexidecimal digit.

Definition at line 20 of file char.h.

Variable Documentation

reductCharTable

reduct_char_info_t reductCharTable[256]

extern

Global character lookup table.

Definition at line 6 of file char_impl.h.