utils.h File Reference

Utility macros. More...

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Macros
#define	IS_SET(val, bit)   (bool)((val) & (1 << (bit)))
	Determines if a bit is set or not. More...
#define	SET(val, bit)   ((val) |= (1 << (bit)))
	Sets a bit. More...
#define	RESET(val, bit)   ((val) &= ~(1 << (bit)))
	Resets a bit. More...
#define	TOGGLE(val, bit)   ((val) ^= (1 << (bit)))
	Toggles a bit. More...

Detailed Description

Utility macros.

Author

Peter H. Ezetta

Date

2016-02-27

Macro Definition Documentation

IS_SET

#define IS_SET	(		val,
			bit
	)		(bool)((val) & (1 << (bit)))

Determines if a bit is set or not.

Parameters

val	Bitfield to check
bit	Position of bit in field

Returns

0 == Checked Bit False, 1 == Checked Bit True.

RESET

#define RESET	(		val,
			bit
	)		((val) &= ~(1 << (bit)))

Resets a bit.

Parameters

val	Bitfield to check
bit	Position of bit in field

SET

#define SET	(		val,
			bit
	)		((val) |= (1 << (bit)))

Sets a bit.

Parameters

val	Bitfield to check
bit	Position of bit in field

TOGGLE

#define TOGGLE	(		val,
			bit
	)		((val) ^= (1 << (bit)))

Toggles a bit.

Parameters

val	Bitfield to check
bit	Position of bit in field