| /* specfunc/gsl_sf_log.h |
| * |
| * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2004 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 2 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_LOG_H__ |
| #define __GSL_SF_LOG_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 |
| |
| |
| /* Provide a logarithm function with GSL semantics. |
| * |
| * exceptions: GSL_EDOM |
| */ |
| int gsl_sf_log_e(const double x, gsl_sf_result * result); |
| double gsl_sf_log(const double x); |
| |
| |
| /* Log(|x|) |
| * |
| * exceptions: GSL_EDOM |
| */ |
| int gsl_sf_log_abs_e(const double x, gsl_sf_result * result); |
| double gsl_sf_log_abs(const double x); |
| |
| |
| /* Complex Logarithm |
| * exp(lnr + I theta) = zr + I zi |
| * Returns argument in [-pi,pi]. |
| * |
| * exceptions: GSL_EDOM |
| */ |
| int gsl_sf_complex_log_e(const double zr, const double zi, gsl_sf_result * lnr, gsl_sf_result * theta); |
| |
| |
| /* Log(1 + x) |
| * |
| * exceptions: GSL_EDOM |
| */ |
| int gsl_sf_log_1plusx_e(const double x, gsl_sf_result * result); |
| double gsl_sf_log_1plusx(const double x); |
| |
| |
| /* Log(1 + x) - x |
| * |
| * exceptions: GSL_EDOM |
| */ |
| int gsl_sf_log_1plusx_mx_e(const double x, gsl_sf_result * result); |
| double gsl_sf_log_1plusx_mx(const double x); |
| |
| __END_DECLS |
| |
| #endif /* __GSL_SF_LOG_H__ */ |