Ratios

Real numbers in [0, 1] stored as scaled integers. More...

Macros
#define	PBL_RATIO32_MAX   65535
	Scale of a ratio32, a uint32_t holding a real number in [0, 1].

Functions
static uint32_t	pbl_ratio32_to_percent (uint32_t ratio)
	Convert a ratio32 to a percentage.
static uint32_t	pbl_ratio32_from_percent (uint32_t percent)
	Convert a percentage to a ratio32.

Detailed Description

Real numbers in [0, 1] stored as scaled integers.

Macro Definition Documentation

PBL_RATIO32_MAX

#define PBL_RATIO32_MAX   65535

Scale of a ratio32, a uint32_t holding a real number in [0, 1].

Function Documentation

pbl_ratio32_from_percent()

static uint32_t pbl_ratio32_from_percent ( uint32_t  percent )

inlinestatic

Convert a percentage to a ratio32.

The result is one more than the truncated value, so it converts back to percent; 100 gives PBL_RATIO32_MAX + 1.

Parameters

percent

Percentage, 0 to 100.

Returns

Ratio32.

References PBL_RATIO32_MAX.

pbl_ratio32_to_percent()

static uint32_t pbl_ratio32_to_percent ( uint32_t  ratio )

inlinestatic

Convert a ratio32 to a percentage.

Parameters

ratio

Ratio32, 0 to PBL_RATIO32_MAX.

Returns

Percentage, 0 to 100, truncated.

References PBL_RATIO32_MAX.