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/*
* Copyright (C) 1999, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2011,
* 2012, 2013 Free Software Foundation, Inc.
*
* This file is part of GNU libmatheval
*
* GNU libmatheval is free software: you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* GNU libmatheval is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU libmatheval. If not, see
* <http://www.gnu.org/licenses/>.
*/
#ifndef XMATH_H
#define XMATH_H 1
#if HAVE_CONFIG_H
#include "config.h"
#endif
#if HAVE_MATH_H
#include <math.h>
#else
#error no <math.h> avaialable
#endif
#ifdef INFINITY
#define MATH_INFINITY INFINITY
#elif defined HUGE_VAL
#define MATH_INFINITY HUGE_VAL
#else
#define MATH_INFINITY (1.0/0.0)
#endif
#ifdef NAN
#define MATH_NAN NAN
#elif defined INFINITY
#define MATH_NAN (INFINITY/INFINITY)
#else
#define MATH_NAN (0.0/0.0)
#endif
#ifdef isnan
#define MATH_ISNAN(x) isnan(x)
#else
#define MATH_ISNAN(x) ((x) != (x))
#endif
/* Calculate cotangent of value x. */
double math_cot(double x);
/* Calculate secant of value x. */
double math_sec(double x);
/* Calculate cosecant of value x. */
double math_csc(double x);
/* Calculate inverse cotangent of value x. */
double math_acot(double x);
/* Calculate inverse secant of value x. */
double math_asec(double x);
/* Calculate inverse cosecant of value x. */
double math_acsc(double x);
/* Calculate hyperbolical cotangent of value x. */
double math_coth(double x);
/* Calculate hyperbolical secant of value x. */
double math_sech(double x);
/* Calculate hyperbolical cosecant of value x. */
double math_csch(double x);
/* Calculate inverse hyperbolical sine of value x. */
double math_asinh(double x);
/* Calculate inverse hyperbolical cosine of value x. */
double math_acosh(double x);
/* Calculate inverse hyperbolical tangent of value x. */
double math_atanh(double x);
/* Calculate inverse hyperbolical cotangent of value x. */
double math_acoth(double x);
/* Calculate inverse hyperbolical secant of value x. */
double math_asech(double x);
/* Calculate inverse hyperbolical cosecant of value x. */
double math_acsch(double x);
/* Calculate Heaviside step function value for given value x. */
double math_step(double x);
/* Calculate Dirac delta function value for given value x. */
double math_delta(double x);
/* Calculate variation of Dirac delta function (with not-a-number instead
* of infinity value for x= 0) value for given value x. */
double math_nandelta(double x);
#endif
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