diff options
Diffstat (limited to 'gsl-1.9/interpolation/spline.c')
| -rw-r--r-- | gsl-1.9/interpolation/spline.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/gsl-1.9/interpolation/spline.c b/gsl-1.9/interpolation/spline.c new file mode 100644 index 0000000..d5b5a0f --- /dev/null +++ b/gsl-1.9/interpolation/spline.c @@ -0,0 +1,193 @@ +/* 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); +} + |