madmath.h File Reference

Intrinsic double-precision math. More...

#include "ma.h"
#include "mastring.h"

Defines
#define	M_E   2.7182818284590452354
#define	M_LOG2E   1.4426950408889634074
#define	M_LOG10E   0.43429448190325182765
#define	M_LN2   0.69314718055994530942
#define	M_LN10   2.30258509299404568402
#define	M_PI   3.14159265358979323846
#define	M_PI_2   1.57079632679489661923
#define	M_PI_4   0.78539816339744830962
#define	M_1_PI   0.31830988618379067154
#define	M_2_PI   0.63661977236758134308
#define	M_2_SQRTPI   1.12837916709551257390
#define	M_SQRT2   1.41421356237309504880
#define	M_SQRT1_2   0.70710678118654752440
#define	M_PI_D180   ((double)((double) 3.14159265358979323846 / (double) 180))
#define	DBL_MANT_DIG   53
#define	DBL_DIG   15
#define	DBL_EPSILON   2.2204460492503131e-16
#define	DBL_MIN_EXP   (-1021)
#define	DBL_MIN   2.2250738585072014e-308
#define	DBL_MIN_10_EXP   (-307)
#define	DBL_MAX_EXP   1024
#define	DBL_MAX   1.7976931348623157e+308
#define	DBL_MAX_10_EXP   308
Functions
double	modf (double x, double *intptr)
double	fmod (double numerator, double denominator)
double	fabs (double d)
double	atof (const char *string)
double	acos (double x)
double	asin (double x)
double	atan2 (double y, double x)
double	log (double x)
double	pow (double x, double y)
double	atan (double x)
double	ceil (double x)
double	floor (double x)
double	frexp (double x, int *eptr)
int	isnan (double x)
int	isinf (double x)

---

Detailed Description

Intrinsic double-precision math.

Author:

Antony Hartley

---

Define Documentation

#define M_E   2.7182818284590452354

#define M_LOG2E   1.4426950408889634074

#define M_LOG10E   0.43429448190325182765

#define M_LN2   0.69314718055994530942

#define M_LN10   2.30258509299404568402

#define M_PI   3.14159265358979323846

#define M_PI_2   1.57079632679489661923

#define M_PI_4   0.78539816339744830962

#define M_1_PI   0.31830988618379067154

#define M_2_PI   0.63661977236758134308

#define M_2_SQRTPI   1.12837916709551257390

#define M_SQRT2   1.41421356237309504880

#define M_SQRT1_2   0.70710678118654752440

#define M_PI_D180   ((double)((double) 3.14159265358979323846 / (double) 180))

#define DBL_MANT_DIG   53

#define DBL_DIG   15

#define DBL_EPSILON   2.2204460492503131e-16

#define DBL_MIN_EXP   (-1021)

#define DBL_MIN   2.2250738585072014e-308

#define DBL_MIN_10_EXP   (-307)

#define DBL_MAX_EXP   1024

#define DBL_MAX   1.7976931348623157e+308

#define DBL_MAX_10_EXP   308

---

Function Documentation

double modf	(	double	x,
		double *	intptr
	)

Breaks x into two parts: the integer part (stored in the object pointed by intpart) and the fractional part (returned by the function). Each part has the same sign as x.

double fmod	(	double	numerator,
		double	denominator
	)

Returns the floating point remainder of the division (numerator / denominator).

double fabs

(

double

d

)

Returns the absolute value of x.

double atof

(

const char *

string

)

Parses the null-terminated string, interpreting its content as a floating point number and returns its value as a double.

double acos

(

double

x

)

Returns the arc cosine of x.

double asin

(

double

x

)

Returns the arc sine of x.

double atan2	(	double	y,
		double	x
	)

Returns the angle of bidimensional vector (x, y), expressed in radians, in the range -PI to PI.

double log

(

double

x

)

Returns the natural logarithm of x.

double pow	(	double	x,
		double	y
	)

Returns x to the power of y.

Referenced by MAP::invResolution(), and MAP::resolution().

double atan

(

double

x

)

Returns the arctangent of x.

double ceil

(

double

x

)

Returns x rounded toward -inf to integral value.

double floor

(

double

x

)

Returns x rounded toward -inf to integral value.

Referenced by MAP::MapViewport::getScaledHeight(), MAP::MapViewport::getScaledWidth(), MAP::MagnificationType::operator int(), and MAP::MagnificationType::operator==().

double frexp	(	double	x,
		int *	eptr
	)

for non-zero x x = frexp(arg,&exp); return a double fp quantity x such that 0.5 <= |x| <1.0 and the corresponding binary exponent "exp". That is arg = x*2^exp. If arg is inf, 0.0, or NaN, then frexp(arg,&exp) returns arg with *exp=0.

int isnan

(

double

x

)

Returns 1 if x is Not a Number. 0 otherwise.

int isinf

(

double

x

)

Returns 1 if x is Infinite. 0 otherwise.