/usr/include/gsl/gsl_spline2d.h is in libgsl-dev 2.1+dfsg-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 | /* interpolation/gsl_spline2d.h
*
* Copyright 2012 David Zaslavsky
*
* 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 3 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.
*/
#ifndef __GSL_SPLINE2D_H__
#define __GSL_SPLINE2D_H__
#include <gsl/gsl_interp.h>
#include <gsl/gsl_interp2d.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
/*
* A 2D interpolation object which stores the arrays defining the function.
* In all other respects, this is just like a gsl_interp2d object.
*/
typedef struct
{
gsl_interp2d interp_object; /* low-level interpolation object */
double * xarr; /* x data array */
double * yarr; /* y data array */
double * zarr; /* z data array */
} gsl_spline2d;
gsl_spline2d * gsl_spline2d_alloc(const gsl_interp2d_type * T, size_t xsize, size_t ysize);
int gsl_spline2d_init(gsl_spline2d * interp, const double xa[],
const double ya[], const double za[],
size_t xsize, size_t ysize);
void gsl_spline2d_free(gsl_spline2d * interp);
double gsl_spline2d_eval(const gsl_spline2d * interp, const double x,
const double y, gsl_interp_accel* xa, gsl_interp_accel* ya);
int gsl_spline2d_eval_e(const gsl_spline2d * interp, const double x,
const double y, gsl_interp_accel* xa, gsl_interp_accel* ya,
double * z);
double gsl_spline2d_eval_deriv_x(const gsl_spline2d * interp, const double x,
const double y, gsl_interp_accel* xa, gsl_interp_accel* ya);
int gsl_spline2d_eval_deriv_x_e(const gsl_spline2d * interp, const double x,
const double y, gsl_interp_accel* xa,
gsl_interp_accel* ya, double * z);
double gsl_spline2d_eval_deriv_y(const gsl_spline2d * interp, const double x,
const double y, gsl_interp_accel* xa,
gsl_interp_accel* ya);
int gsl_spline2d_eval_deriv_y_e(const gsl_spline2d * interp, const double x,
const double y, gsl_interp_accel* xa,
gsl_interp_accel* ya, double * z);
double gsl_spline2d_eval_deriv_xx(const gsl_spline2d * interp, const double x,
const double y, gsl_interp_accel* xa, gsl_interp_accel* ya);
int gsl_spline2d_eval_deriv_xx_e(const gsl_spline2d * interp, const double x,
const double y, gsl_interp_accel* xa,
gsl_interp_accel* ya, double * z);
double gsl_spline2d_eval_deriv_yy(const gsl_spline2d * interp, const double x,
const double y, gsl_interp_accel* xa, gsl_interp_accel* ya);
int gsl_spline2d_eval_deriv_yy_e(const gsl_spline2d * interp, const double x,
const double y, gsl_interp_accel* xa,
gsl_interp_accel* ya, double * z);
double gsl_spline2d_eval_deriv_xy(const gsl_spline2d * interp, const double x,
const double y, gsl_interp_accel* xa, gsl_interp_accel* ya);
int gsl_spline2d_eval_deriv_xy_e(const gsl_spline2d * interp, const double x,
const double y, gsl_interp_accel* xa,
gsl_interp_accel* ya, double * z);
size_t gsl_spline2d_min_size(const gsl_spline2d * interp);
const char * gsl_spline2d_name(const gsl_spline2d * interp);
int gsl_spline2d_set(const gsl_spline2d * interp, double zarr[],
const size_t i, const size_t j, const double z);
double gsl_spline2d_get(const gsl_spline2d * interp, const double zarr[],
const size_t i, const size_t j);
__END_DECLS
#endif /* __GSL_SPLINE2D_H__ */
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