clibs_math.h File Reference

Common math operations. More...

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Macros
#define	MAX(a, b)
	Get the maximal value between a and b.
#define	MIN(a, b)
	Get the minimal value between a and b.
#define	ABS(a)
	Get the absolute value of a.
#define	IS_EQUAL(a, b, epsilon)
	Check the equality between two floating-point numbers.
#define	COMPARE(a, b)
	Compare two numeric data.
#define	IS_EVEN(n)
	Check whether n is even.
#define	IS_ODD(n)
	Check whether n is odd.
#define	SWAP(a, b)
	Swap between a and b.
#define	RANDINT(min, max)
	Get a random integer bewteen min and max.
#define	INF   (1.0 / 0.0)
	An infinity number.
#define	IS_INF(n)
	Check whether n is an infinity number.
#define	NEG_INF   (-1.0 / 0.0)
	A negative infinity number.
#define	IS_NEG_INF(n)
	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)

Detailed Description

Common math operations.

Author

ByteBard

Copyright

MIT

Macro Definition Documentation

ABS

#define ABS

(

a

)

Value:

((a) > 0.0 ? (a) : -(a))

Get the absolute value of a.

COMPARE

#define COMPARE	(		a,
			b )

Value:

((a) > (b) ? 1 : (a) == (b) ? 0 : -1)

Compare two numeric data.

IS_EQUAL

#define IS_EQUAL	(		a,
			b,
			epsilon )

Value:

(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_EVEN

#define IS_EVEN

(

n

)

Value:

(!((n) & 1))

Check whether n is even.

IS_INF

#define IS_INF

(

n

)

Value:

((n) > FLT_MAX)

Check whether n is an infinity number.

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)

IS_NEG_INF

#define IS_NEG_INF

(

n

)

Value:

(-(n) > FLT_MAX)

Check whether n is a negative infinity number.

IS_ODD

#define IS_ODD

(

n

)

Value:

((n) & 1)

Check whether n is odd.

MAX

#define MAX	(		a,
			b )

Value:

((a) > (b) ? (a) : (b))

Get the maximal value between a and b.

MIN

#define MIN	(		a,
			b )

Value:

((a) < (b) ? (a) : (b))

Get the minimal value between a and b.

RANDINT

#define RANDINT	(		min,
			max )

Value:

((min) + rand() % ((max) - (min) + 1))

Get a random integer bewteen min and max.

Set a random seed by yourself.

SWAP

#define SWAP	(		a,
			b )

Value:

(((a) ^= (b)), ((b) ^= (a)), ((a) ^= (b)))

Swap between a and b.

a and b are integers