Rounding behavior

Collaboration diagram for Rounding behavior:

Macros
#define	DIV_ROUND_DOWN   -1
	Rounding behavior: always round down.
#define	DIV_ROUND_UP   1
	Rounding behavior: always round up.
#define	DIV_ROUND_NEAREST   0
	Rounding behavior: round to nearest.
#define	DIV_ROUND_BEHAVIOR   DIV_ROUND_NEAREST
	Integer division rounding behavior.
#define	DIV_ROUND_CORRECT(d, t)   ((t)(((d)>>1U)+(t)DIV_ROUND_BEHAVIOR))
	Computes the denominator correction for rounding division based on our rounding behavior.

Detailed Description

Macro Definition Documentation

DIV_ROUND_BEHAVIOR

#define DIV_ROUND_BEHAVIOR   DIV_ROUND_NEAREST

Integer division rounding behavior.

DIV_ROUND_CORRECT

#define DIV_ROUND_CORRECT	(		d,
			t
	)		((t)(((d)>>1U)+(t)DIV_ROUND_BEHAVIOR))

Computes the denominator correction for rounding division based on our rounding behavior.

Parameters

d	The divisor (an integer)
t	The type of the result. E.g. uint16_t

DIV_ROUND_DOWN

#define DIV_ROUND_DOWN   -1

Rounding behavior: always round down.

DIV_ROUND_NEAREST

#define DIV_ROUND_NEAREST   0

Rounding behavior: round to nearest.

This rounds 0.5 away from zero. This is the same behavior as the standard library round() function.

DIV_ROUND_UP

#define DIV_ROUND_UP   1

Rounding behavior: always round up.