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/* specfunc/gsl_sf_trig.h
*
* Copyright (C) 1996, 1997, 1998, 1999, 2000 Gerard Jungman
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/* Author: G. Jungman */
#ifndef __GSL_SF_TRIG_H__
#define __GSL_SF_TRIG_H__
#include <gsl/gsl_sf_result.h>
#undef __BEGIN_DECLS
#undef __END_DECLS
#ifdef __cplusplus
# define __BEGIN_DECLS extern "C" {
# define __END_DECLS }
#else
# define __BEGIN_DECLS /* empty */
# define __END_DECLS /* empty */
#endif
__BEGIN_DECLS
/* Sin(x) with GSL semantics. This is actually important
* because we want to control the error estimate, and trying
* to guess the error for the standard library implementation
* every time it is used would be a little goofy.
*/
int gsl_sf_sin_e(double x, gsl_sf_result * result);
double gsl_sf_sin(const double x);
/* Cos(x) with GSL semantics.
*/
int gsl_sf_cos_e(double x, gsl_sf_result * result);
double gsl_sf_cos(const double x);
/* Hypot(x,y) with GSL semantics.
*/
int gsl_sf_hypot_e(const double x, const double y, gsl_sf_result * result);
double gsl_sf_hypot(const double x, const double y);
/* Sin(z) for complex z
*
* exceptions: GSL_EOVRFLW
*/
int gsl_sf_complex_sin_e(const double zr, const double zi, gsl_sf_result * szr, gsl_sf_result * szi);
/* Cos(z) for complex z
*
* exceptions: GSL_EOVRFLW
*/
int gsl_sf_complex_cos_e(const double zr, const double zi, gsl_sf_result * czr, gsl_sf_result * czi);
/* Log(Sin(z)) for complex z
*
* exceptions: GSL_EDOM, GSL_ELOSS
*/
int gsl_sf_complex_logsin_e(const double zr, const double zi, gsl_sf_result * lszr, gsl_sf_result * lszi);
/* Sinc(x) = sin(pi x) / (pi x)
*
* exceptions: none
*/
int gsl_sf_sinc_e(double x, gsl_sf_result * result);
double gsl_sf_sinc(const double x);
/* Log(Sinh(x)), x > 0
*
* exceptions: GSL_EDOM
*/
int gsl_sf_lnsinh_e(const double x, gsl_sf_result * result);
double gsl_sf_lnsinh(const double x);
/* Log(Cosh(x))
*
* exceptions: none
*/
int gsl_sf_lncosh_e(const double x, gsl_sf_result * result);
double gsl_sf_lncosh(const double x);
/* Convert polar to rectlinear coordinates.
*
* exceptions: GSL_ELOSS
*/
int gsl_sf_polar_to_rect(const double r, const double theta, gsl_sf_result * x, gsl_sf_result * y);
/* Convert rectilinear to polar coordinates.
* return argument in range [-pi, pi]
*
* exceptions: GSL_EDOM
*/
int gsl_sf_rect_to_polar(const double x, const double y, gsl_sf_result * r, gsl_sf_result * theta);
/* Sin(x) for quantity with an associated error.
*/
int gsl_sf_sin_err_e(const double x, const double dx, gsl_sf_result * result);
/* Cos(x) for quantity with an associated error.
*/
int gsl_sf_cos_err_e(const double x, const double dx, gsl_sf_result * result);
/* Force an angle to lie in the range (-pi,pi].
*
* exceptions: GSL_ELOSS
*/
int gsl_sf_angle_restrict_symm_e(double * theta);
double gsl_sf_angle_restrict_symm(const double theta);
/* Force an angle to lie in the range [0, 2pi)
*
* exceptions: GSL_ELOSS
*/
int gsl_sf_angle_restrict_pos_e(double * theta);
double gsl_sf_angle_restrict_pos(const double theta);
int gsl_sf_angle_restrict_symm_err_e(const double theta, gsl_sf_result * result);
int gsl_sf_angle_restrict_pos_err_e(const double theta, gsl_sf_result * result);
__END_DECLS
#endif /* __GSL_SF_TRIG_H__ */
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