Datei: /usr/include/math.h

/*
 * Copyright 07 Feb 1995 Sun Microsystems, Inc.  All Rights Reserved.
 */

#ifndef _MATH_H
#define	_MATH_H

#ifdef __cplusplus
extern "C" {
#endif

#pragma ident	"@(#)math.h	2.5	95/02/07"

#if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
#define	_POSIX_C_SOURCE	1
#endif

#ifdef __STDC__
#define	__P(p)	p
#else
#define	__P(p)	()
#endif

/*
 * ANSI/POSIX
 */
typedef union _h_val {
  	unsigned long _i[2];
	double _d;
} _h_val;

#ifdef __STDC__
extern const _h_val __huge_val;
#else
extern _h_val __huge_val;
#endif

#define	HUGE_VAL __huge_val._d

#if defined(__EXTENSIONS__) || __STDC__ - 0 == 0 && \
	!defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE)
/*
 * SVID & X/Open
 */
#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

extern int signgam;

#define	MAXFLOAT	((float)3.40282346638528860e+38)

#if defined(__EXTENSIONS__) || !defined(_XOPEN_SOURCE)
/*
 * SVID
 */
enum version {libm_ieee = -1, c_issue_4, ansi_1, strict_ansi};

#ifdef __STDC__
extern const enum version _lib_version;
#else
extern enum version _lib_version;
#endif

struct exception {
	int type;
	char *name;
	double arg1;
	double arg2;
	double retval;
};

#define	HUGE		MAXFLOAT

#define	_ABS(x)		((x) < 0 ? -(x) : (x))

#define	_REDUCE(TYPE, X, XN, C1, C2)	{ \
	double x1 = (double)(TYPE)X, x2 = X - x1; \
	X = x1 - (XN) * (C1); X += x2; X -= (XN) * (C2); }

#define	DOMAIN		1
#define	SING		2
#define	OVERFLOW	3
#define	UNDERFLOW	4
#define	TLOSS		5
#define	PLOSS		6

#define	_POLY1(x, c)	((c)[0] * (x) + (c)[1])
#define	_POLY2(x, c)	(_POLY1((x), (c)) * (x) + (c)[2])
#define	_POLY3(x, c)	(_POLY2((x), (c)) * (x) + (c)[3])
#define	_POLY4(x, c)	(_POLY3((x), (c)) * (x) + (c)[4])
#define	_POLY5(x, c)	(_POLY4((x), (c)) * (x) + (c)[5])
#define	_POLY6(x, c)	(_POLY5((x), (c)) * (x) + (c)[6])
#define	_POLY7(x, c)	(_POLY6((x), (c)) * (x) + (c)[7])
#define	_POLY8(x, c)	(_POLY7((x), (c)) * (x) + (c)[8])
#define	_POLY9(x, c)	(_POLY8((x), (c)) * (x) + (c)[9])
#endif	/* defined(__EXTENSIONS__) || !defined(_XOPEN_SOURCE) */
#endif	/* defined(__EXTENSIONS__) || __STDC__ - 0 == 0 && ... */

/*
 * ANSI/POSIX
 */
extern double acos __P((double));
extern double asin __P((double));
extern double atan __P((double));
extern double atan2 __P((double, double));
extern double cos __P((double));
extern double sin __P((double));
extern double tan __P((double));

extern double cosh __P((double));
extern double sinh __P((double));
extern double tanh __P((double));

extern double exp __P((double));
extern double frexp __P((double, int *));
extern double ldexp __P((double, int));
extern double log __P((double));
extern double log10 __P((double));
extern double modf __P((double, double *));

extern double pow __P((double, double));
extern double sqrt __P((double));

extern double ceil __P((double));
extern double fabs __P((double));
extern double floor __P((double));
extern double fmod __P((double, double));

#if defined(__EXTENSIONS__) || __STDC__ - 0 == 0 && \
	!defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE)
/*
 * SVID & X/Open
 */
extern double erf __P((double));
extern double erfc __P((double));
extern double gamma __P((double));
extern double hypot __P((double, double));
extern int isnan __P((double));
extern double j0 __P((double));
extern double j1 __P((double));
extern double jn __P((int, double));
extern double lgamma __P((double));
extern double y0 __P((double));
extern double y1 __P((double));
extern double yn __P((int, double));

#if defined(__EXTENSIONS__) || !defined(_XOPEN_SOURCE) || \
	defined(_XOPEN_SOURCE) && _XOPEN_SOURCE_EXTENDED - 0 == 1
/*
 * SVID & XPG 4.2
 */
extern double acosh __P((double));
extern double asinh __P((double));
extern double atanh __P((double));
extern double cbrt __P((double));
extern double logb __P((double));
extern double nextafter __P((double, double));
extern double remainder __P((double, double));
extern double scalb __P((double, double));

/*
 * XPG 4.2
 */
extern double expm1 __P((double));
extern int ilogb __P((double));
extern double log1p __P((double));
extern double rint __P((double));
#endif	/* defined(__EXTENSIONS__) || !defined(_XOPEN_SOURCE) || ... */

#if defined(__EXTENSIONS__) || !defined(_XOPEN_SOURCE)
/*
 * SVID
 */
extern int matherr __P((struct exception *));

/*
 * IEEE Test Vector
 */
extern double significand __P((double));

/*
 * Functions callable from C, intended to support IEEE arithmetic.
 */
extern double copysign __P((double, double));
extern double scalbn __P((double, int));

/*
 * Reentrant version of gamma & lgamma; passes signgam back by reference
 * as the second argument; user must allocate space for signgam.
 */
#ifdef _REENTRANT
extern double gamma_r __P((double, int *));
extern double lgamma_r __P((double, int *));
#endif

/*
 * Orphan(s); frexp, ldexp, modf and modff are part of libc nowadays.
 */
extern float modff __P((float, float *));

#include <floatingpoint.h>
#endif	/* defined(__EXTENSIONS__) || !defined(_XOPEN_SOURCE) */
#endif	/* defined(__EXTENSIONS__) || __STDC__ - 0 == 0 && ... */

#ifdef __cplusplus
}
#endif

#endif	/* !defined(_MATH_H) */