1 /* specfunc/gsl_sf_log.h
3 * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2004 Gerard Jungman
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 3 of the License, or (at
8 * your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 /* Author: G. Jungman */
22 #ifndef __GSL_SF_LOG_H__
23 #define __GSL_SF_LOG_H__
25 #include <gsl/gsl_sf_result.h>
30 # define __BEGIN_DECLS extern "C" {
31 # define __END_DECLS }
33 # define __BEGIN_DECLS /* empty */
34 # define __END_DECLS /* empty */
40 /* Provide a logarithm function with GSL semantics.
42 * exceptions: GSL_EDOM
44 int gsl_sf_log_e(const double x, gsl_sf_result * result);
45 double gsl_sf_log(const double x);
50 * exceptions: GSL_EDOM
52 int gsl_sf_log_abs_e(const double x, gsl_sf_result * result);
53 double gsl_sf_log_abs(const double x);
57 * exp(lnr + I theta) = zr + I zi
58 * Returns argument in [-pi,pi].
60 * exceptions: GSL_EDOM
62 int gsl_sf_complex_log_e(const double zr, const double zi, gsl_sf_result * lnr, gsl_sf_result * theta);
67 * exceptions: GSL_EDOM
69 int gsl_sf_log_1plusx_e(const double x, gsl_sf_result * result);
70 double gsl_sf_log_1plusx(const double x);
75 * exceptions: GSL_EDOM
77 int gsl_sf_log_1plusx_mx_e(const double x, gsl_sf_result * result);
78 double gsl_sf_log_1plusx_mx(const double x);
82 #endif /* __GSL_SF_LOG_H__ */