Common math operations. More...

Macros
#define	MAX(a, b) ((a) > (b) ? (a) : (b))
	Get the maximal value between a and b.

#define	MIN(a, b) ((a) < (b) ? (a) : (b))
	Get the minimal value between a and b.

#define	ABS(a) ((a) > 0.0 ? (a) : -(a))
	Get the absolute value of a.

#define	IS_EQUAL(a, b, epsilon) (ABS((a) - (b)) <= (epsilon))
	Check the equality between two floating-point numbers. More...

#define	COMPARE(a, b) ((a) > (b) ? 1 : (a) == (b) ? 0 : -1)
	Compare two numeric data.

#define	IS_EVEN(n) (!((n) & 1))
	Check whether n is even.

#define	IS_ODD(n) ((n) & 1)
	Check whether n is odd.

#define	SWAP(a, b) (((a) ^= (b)), ((b) ^= (a)), ((a) ^= (b)))
	Swap between a and b. More...

#define	RANDINT(min, max) ((min) + rand() % ((max) - (min) + 1))
	Get a random integer bewteen min and max. More...

#define	INF (1.0 / 0.0)
	An infinity number.

#define	IS_INF(n) ((n) > FLT_MAX)
	Check whether n is an infinity number.

#define	NEG_INF (-1.0 / 0.0)
	A negative infinity number.

#define	IS_NEG_INF(n) (-(n) > FLT_MAX)
	Check whether n is a negative infinity number.

#define	NaN (0.0 / 0.0)
	A NaN (not a number)

#define	IS_NaN(n)
	Check whether n is NaN (not a number) More...

Detailed Description

Common math operations.

Author: ByteBard

Copyright: MIT

Macro Definition Documentation

◆ IS_EQUAL

#define IS_EQUAL	(	a,
		b,
		epsilon
	)	(ABS((a) - (b)) <= (epsilon))

Check the equality between two floating-point numbers.

IS_EQUAL(a, b, epsilon) compares two floating-point numbers by the absolute value of the difference between a and b. The value should be smaller than epsilon

◆ IS_NaN

#define IS_NaN ( n )

Value:

((n) > (n)  ? 0 : \
         (n) == (n) ? 0 : \
         (n) < (n)  ? 0 : 1)

Check whether n is NaN (not a number)

◆ RANDINT

#define RANDINT	(	min,
		max
	)	((min) + rand() % ((max) - (min) + 1))

Get a random integer bewteen min and max.

Set a random seed by yourself.

◆ SWAP

#define SWAP	(	a,
		b
	)	(((a) ^= (b)), ((b) ^= (a)), ((a) ^= (b)))

Swap between a and b.

a and b are integers