SPAR/AIModule/BWTA/vendors/CGAL/CGAL/CORE/CoreAux.h File Reference

#include <iostream>
#include <fstream>
#include "CGAL/CORE/Impl.h"

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Defines
#define	LONG_BIT   (sizeof(long) * 8)
#define	CORE_EPS   ((1.0/(1<<30))/(1<<23))
	CORE_EPS is unit roundoff for IEEE standard double, i.e., 2^{-53}.
#define	CORE_MACHINE_EPS   ((1.0/(1<<30))/(1<<22))
Functions
template<class T >
const T &	core_max (const T &a, const T &b)
	template function returns the maximum value of two
template<class T >
const T &	core_min (const T &a, const T &b)
	template function returns the minimum value of two
template<class T >
const T &	core_max (const T &a, const T &b, const T &c)
	template function returns the maximum value of three
template<class T >
void	core_swap (T &a, T &b)
	template function swaps two values
template<class T >
void	core_rotate (T &a, T &b, T &c)
	template function rotate three values
template<class T >
const T &	core_min (const T &a, const T &b, const T &c)
	template function returns the minimum value of three
template<class T >
const T	core_abs (const T &a)
	template function returns the absolute value
int	flrLg (long x)
	returns floor log base 2 of abs(x)
int	flrLg (unsigned long x)
	returns floor log base 2 of unsigned long x
int	clLg (long x)
	returns ceiling log base 2 of abs(x)
int	clLg (unsigned long x)
	returns ceiling log base 2 of unsigned long x
long	gcd (long m, long n)
	gcd for machine type long
int	abs (int x)
	abs for int type
long	abs (long x)
	abs for long type
int	sign (int x)
	sign for int type
long	sign (long x)
	sign for long type
std::ostream &	operator<< (std::ostream &o, const std::string &s)
	overloaded << to print out std::string
double	IntMantissa (double d)
	implements the "integer mantissa" function
int	IntExponent (double d)
	implements the "integer exponent" function
void	core_error (std::string msg, std::string file, int lineno, bool err)
	Writes out an error or warning message in the local file CORE_DIAGFILE.
void	core_debug (std::string msg)
	This is for debugging messages.
Variables
const double	relEps = (1.0 + std::ldexp(1.0, -52))
	relEps is relative error for IEEE standard double, 1+2^{-52}.
const char *	CORE_DIAGFILE
	CORE_DIAGFILE is used for all warning and error messages.

---

Define Documentation

#define CORE_EPS   ((1.0/(1<<30))/(1<<23))

CORE_EPS is unit roundoff for IEEE standard double, i.e., 2^{-53}.

#define CORE_MACHINE_EPS   ((1.0/(1<<30))/(1<<22))

#define LONG_BIT   (sizeof(long) * 8)

---

Function Documentation

int abs

(

int

x

)

[inline]

abs for int type

long abs

(

long

x

)

[inline]

abs for long type

int clLg

(

long

x

)

returns ceiling log base 2 of abs(x)

CONVENTION: lg(0) = -1

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int clLg

(

unsigned long

x

)

returns ceiling log base 2 of unsigned long x

CONVENTION: lg(0) = -1

template<class T >

const T core_abs

(

const T &

a

)

[inline]

template function returns the absolute value

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void core_debug

(

std::string

msg

)

[inline]

This is for debugging messages.

void core_error	(	std::string	msg,
		std::string	file,
		int	lineno,
		bool	err
	)

Writes out an error or warning message in the local file CORE_DIAGFILE.

If last argument (err) is TRUE, then this is considered an error (not just warning). In this case, the message is also printed in std::cerr, using std::perror().

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template<class T >

const T& core_max	(	const T &	a,
		const T &	b
	)		[inline]

template function returns the maximum value of two

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template<class T >

const T& core_max	(	const T &	a,
		const T &	b,
		const T &	c
	)		[inline]

template function returns the maximum value of three

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template<class T >

const T& core_min	(	const T &	a,
		const T &	b
	)		[inline]

template function returns the minimum value of two

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template<class T >

const T& core_min	(	const T &	a,
		const T &	b,
		const T &	c
	)		[inline]

template function returns the minimum value of three

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template<class T >

void core_rotate	(	T &	a,
		T &	b,
		T &	c
	)		[inline]

template function rotate three values

template<class T >

void core_swap	(	T &	a,
		T &	b
	)		[inline]

template function swaps two values

int flrLg

(

long

x

)

returns floor log base 2 of abs(x)

CONVENTION: lg(0) = -1

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int flrLg

(

unsigned long

x

)

returns floor log base 2 of unsigned long x

CONVENTION: lg(0) = -1

long gcd	(	long	m,
		long	n
	)

gcd for machine type long

int IntExponent

(

double

d

)

implements the "integer exponent" function

double IntMantissa

(

double

d

)

implements the "integer mantissa" function

std::ostream& operator<<	(	std::ostream &	o,
		const std::string &	s
	)		[inline]

overloaded << to print out std::string

int sign

(

int

x

)

[inline]

sign for int type

long sign

(

long

x

)

[inline]

sign for long type

---

Variable Documentation

const char* CORE_DIAGFILE

CORE_DIAGFILE is used for all warning and error messages.

const double relEps = (1.0 + std::ldexp(1.0, -52))

relEps is relative error for IEEE standard double, 1+2^{-52}.