Math Helpers

Helper Macros for math operations. More...

Collaboration diagram for Math Helpers:

Detailed Description

Helper Macros for math operations.

The sys/math.h header provides common math macros for operations such as clamping, rounding, and linear interpolation.

Macros
#define	MAX(x, y)   (((x) > (y)) ? (x) : (y))
#define	MIN(x, y)   (((x) < (y)) ? (x) : (y))
#define	CLAMP(x, low, high)   MIN((high), MAX((low), (x)))
#define	ROUND_UP(number, multiple)    ((((uint64_t)(number) + (uint64_t)(multiple) - 1) / (uint64_t)(multiple)) * (uint64_t)(multiple))
#define	ROUND_DOWN(number, multiple)   (((uint64_t)(number) / (uint64_t)(multiple)) * (uint64_t)(multiple))
#define	LERP_INT(start, end, t, minT, maxT)   (((start) * ((maxT) - (t))) + ((end) * ((t) - (minT)))) / ((maxT) - (minT))
#define	IS_POW2(x)   (((x) & ((x) - 1)) == 0)

Functions
uint64_t	next_pow2 (uint64_t n)

Macro Definition Documentation

MAX

#define MAX	(		x,
			y
	)		(((x) > (y)) ? (x) : (y))

Definition at line 17 of file math.h.

MIN

#define MIN	(		x,
			y
	)		(((x) < (y)) ? (x) : (y))

Definition at line 18 of file math.h.

CLAMP

#define CLAMP	(		x,
			low,
			high
	)		MIN((high), MAX((low), (x)))

Definition at line 19 of file math.h.

ROUND_UP

#define ROUND_UP	(		number,
			multiple
	)		((((uint64_t)(number) + (uint64_t)(multiple) - 1) / (uint64_t)(multiple)) * (uint64_t)(multiple))

Definition at line 21 of file math.h.

ROUND_DOWN

#define ROUND_DOWN	(		number,
			multiple
	)		(((uint64_t)(number) / (uint64_t)(multiple)) * (uint64_t)(multiple))

Definition at line 23 of file math.h.

LERP_INT

#define LERP_INT	(		start,
			end,
			t,
			minT,
			maxT
	)		(((start) * ((maxT) - (t))) + ((end) * ((t) - (minT)))) / ((maxT) - (minT))

Definition at line 25 of file math.h.

IS_POW2

#define IS_POW2

(

x

)

(((x) & ((x) - 1)) == 0)

Definition at line 27 of file math.h.

Function Documentation

next_pow2()

uint64_t next_pow2

(

uint64_t

n

)

Definition at line 3 of file new_pow2.c.

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