include/gsl/gsl_sf_sincos_pi.h

0001 /* specfunc/gsl_sf_sincos_pi.h
0002  *
0003  * Copyright (C) 2017 Konrad Griessinger
0004  *
0005  * This program is free software; you can redistribute it and/or modify
0006  * it under the terms of the GNU General Public License as published by
0007  * the Free Software Foundation; either version 3 of the License, or (at
0008  * your option) any later version.
0009  *
0010  * This program is distributed in the hope that it will be useful, but
0011  * WITHOUT ANY WARRANTY; without even the implied warranty of
0012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
0013  * General Public License for more details.
0014  *
0015  * You should have received a copy of the GNU General Public License
0016  * along with this program; if not, write to the Free Software
0017  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
0018  */
0019
0020 /* Author:  G. Jungman, K. Griessinger */
0021
0022 #ifndef __GSL_SF_SINCOS_PI_H__
0023 #define __GSL_SF_SINCOS_PI_H__
0024
0025 #include <gsl/gsl_sf_result.h>
0026
0027 #undef __BEGIN_DECLS
0028 #undef __END_DECLS
0029 #ifdef __cplusplus
0030 # define __BEGIN_DECLS extern "C" {
0031 # define __END_DECLS }
0032 #else
0033 # define __BEGIN_DECLS /* empty */
0034 # define __END_DECLS /* empty */
0035 #endif
0036
0037 __BEGIN_DECLS
0038
0039
0040 /* sin_pi(x) with GSL semantics. This is actually important
0041  * because we want to control the error estimate, and trying
0042  * to guess the error for the standard library implementation
0043  * every time it is used would be a little goofy.
0044  */
0045 int gsl_sf_sin_pi_e(double x, gsl_sf_result * result);
0046 double gsl_sf_sin_pi(const double x);
0047
0048
0049 /* cos_pi(x) with GSL semantics.
0050  */
0051 int gsl_sf_cos_pi_e(double x, gsl_sf_result * result);
0052 double gsl_sf_cos_pi(const double x);
0053
0054
0055 __END_DECLS
0056
0057 #endif /* __GSL_SF_SINCOS_PI_H__ */