| /* interpolation/spline.c |
| * |
| * Copyright (C) 2001 Brian Gough |
| * |
| * 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. |
| */ |
| |
| #include <config.h> |
| #include <string.h> |
| #include <gsl/gsl_errno.h> |
| #include <gsl/gsl_interp.h> |
| #include <gsl/gsl_spline.h> |
| |
| gsl_spline * |
| gsl_spline_alloc (const gsl_interp_type * T, size_t size) |
| { |
| gsl_spline * spline = (gsl_spline *) malloc (sizeof(gsl_spline)); |
| |
| if (spline == NULL) |
| { |
| GSL_ERROR_NULL ("failed to allocate space for spline struct", |
| GSL_ENOMEM); |
| } |
| |
| spline->interp = gsl_interp_alloc (T, size); |
| |
| if (spline->interp == NULL) |
| { |
| free (spline); |
| GSL_ERROR_NULL ("failed to allocate space for interp", GSL_ENOMEM); |
| }; |
| |
| spline->x = (double *) malloc (size * sizeof(double)); |
| |
| if (spline->x == NULL) |
| { |
| gsl_interp_free(spline->interp); |
| free(spline); |
| GSL_ERROR_NULL ("failed to allocate space for x", GSL_ENOMEM); |
| } |
| |
| spline->y = (double *) malloc (size * sizeof(double)); |
| |
| if (spline->y == NULL) |
| { |
| free(spline->x); |
| gsl_interp_free(spline->interp); |
| free(spline); |
| GSL_ERROR_NULL ("failed to allocate space for y", GSL_ENOMEM); |
| } |
| |
| spline->size = size; |
| |
| return spline; |
| } |
| |
| int |
| gsl_spline_init (gsl_spline * spline, const double x_array[], const double y_array[], size_t size) |
| { |
| if (size != spline->size) |
| { |
| GSL_ERROR ("data must match size of spline object", GSL_EINVAL); |
| } |
| |
| memcpy (spline->x, x_array, size * sizeof(double)); |
| memcpy (spline->y, y_array, size * sizeof(double)); |
| |
| { |
| int status = gsl_interp_init (spline->interp, x_array, y_array, size); |
| return status; |
| } |
| } |
| |
| const char * |
| gsl_spline_name(const gsl_spline * spline) |
| { |
| return gsl_interp_name(spline->interp); |
| } |
| |
| unsigned int |
| gsl_spline_min_size(const gsl_spline * spline) |
| { |
| return gsl_interp_min_size(spline->interp); |
| } |
| |
| void |
| gsl_spline_free (gsl_spline * spline) |
| { |
| gsl_interp_free (spline->interp); |
| free (spline->x); |
| free (spline->y); |
| free (spline); |
| } |
| |
| int |
| gsl_spline_eval_e (const gsl_spline * spline, |
| double x, |
| gsl_interp_accel * a, double *y) |
| { |
| return gsl_interp_eval_e (spline->interp, |
| spline->x, spline->y, |
| x, a, y); |
| } |
| |
| double |
| gsl_spline_eval (const gsl_spline * spline, |
| double x, |
| gsl_interp_accel * a) |
| { |
| return gsl_interp_eval (spline->interp, |
| spline->x, spline->y, |
| x, a); |
| } |
| |
| |
| int |
| gsl_spline_eval_deriv_e (const gsl_spline * spline, |
| double x, |
| gsl_interp_accel * a, |
| double *dydx) |
| { |
| return gsl_interp_eval_deriv_e (spline->interp, |
| spline->x, spline->y, |
| x, a, dydx); |
| } |
| |
| double |
| gsl_spline_eval_deriv (const gsl_spline * spline, |
| double x, |
| gsl_interp_accel * a) |
| { |
| return gsl_interp_eval_deriv (spline->interp, |
| spline->x, spline->y, |
| x, a); |
| } |
| |
| |
| int |
| gsl_spline_eval_deriv2_e (const gsl_spline * spline, |
| double x, |
| gsl_interp_accel * a, |
| double * d2) |
| { |
| return gsl_interp_eval_deriv2_e (spline->interp, |
| spline->x, spline->y, |
| x, a, d2); |
| } |
| |
| double |
| gsl_spline_eval_deriv2 (const gsl_spline * spline, |
| double x, |
| gsl_interp_accel * a) |
| { |
| return gsl_interp_eval_deriv2 (spline->interp, |
| spline->x, spline->y, |
| x, a); |
| } |
| |
| |
| int |
| gsl_spline_eval_integ_e (const gsl_spline * spline, |
| double a, double b, |
| gsl_interp_accel * acc, |
| double * result) |
| { |
| return gsl_interp_eval_integ_e (spline->interp, |
| spline->x, spline->y, |
| a, b, acc, result); |
| } |
| |
| |
| double |
| gsl_spline_eval_integ (const gsl_spline * spline, |
| double a, double b, |
| gsl_interp_accel * acc) |
| { |
| return gsl_interp_eval_integ (spline->interp, |
| spline->x, spline->y, |
| a, b, acc); |
| } |
| |