/usr/include/gsl/gsl_roots.h is in libgsl-dev 2.3+dfsg-1.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 | /* roots/gsl_roots.h
*
* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 Reid Priedhorsky, 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 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_ROOTS_H__
#define __GSL_ROOTS_H__
#include <stdlib.h>
#include <gsl/gsl_types.h>
#include <gsl/gsl_math.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
typedef struct
{
const char *name;
size_t size;
int (*set) (void *state, gsl_function * f, double * root, double x_lower, double x_upper);
int (*iterate) (void *state, gsl_function * f, double * root, double * x_lower, double * x_upper);
}
gsl_root_fsolver_type;
typedef struct
{
const gsl_root_fsolver_type * type;
gsl_function * function ;
double root ;
double x_lower;
double x_upper;
void *state;
}
gsl_root_fsolver;
typedef struct
{
const char *name;
size_t size;
int (*set) (void *state, gsl_function_fdf * f, double * root);
int (*iterate) (void *state, gsl_function_fdf * f, double * root);
}
gsl_root_fdfsolver_type;
typedef struct
{
const gsl_root_fdfsolver_type * type;
gsl_function_fdf * fdf ;
double root ;
void *state;
}
gsl_root_fdfsolver;
gsl_root_fsolver *
gsl_root_fsolver_alloc (const gsl_root_fsolver_type * T);
void gsl_root_fsolver_free (gsl_root_fsolver * s);
int gsl_root_fsolver_set (gsl_root_fsolver * s,
gsl_function * f,
double x_lower, double x_upper);
int gsl_root_fsolver_iterate (gsl_root_fsolver * s);
const char * gsl_root_fsolver_name (const gsl_root_fsolver * s);
double gsl_root_fsolver_root (const gsl_root_fsolver * s);
double gsl_root_fsolver_x_lower (const gsl_root_fsolver * s);
double gsl_root_fsolver_x_upper (const gsl_root_fsolver * s);
gsl_root_fdfsolver *
gsl_root_fdfsolver_alloc (const gsl_root_fdfsolver_type * T);
int
gsl_root_fdfsolver_set (gsl_root_fdfsolver * s,
gsl_function_fdf * fdf, double root);
int
gsl_root_fdfsolver_iterate (gsl_root_fdfsolver * s);
void
gsl_root_fdfsolver_free (gsl_root_fdfsolver * s);
const char * gsl_root_fdfsolver_name (const gsl_root_fdfsolver * s);
double gsl_root_fdfsolver_root (const gsl_root_fdfsolver * s);
int
gsl_root_test_interval (double x_lower, double x_upper, double epsabs, double epsrel);
int
gsl_root_test_residual (double f, double epsabs);
int
gsl_root_test_delta (double x1, double x0, double epsabs, double epsrel);
GSL_VAR const gsl_root_fsolver_type * gsl_root_fsolver_bisection;
GSL_VAR const gsl_root_fsolver_type * gsl_root_fsolver_brent;
GSL_VAR const gsl_root_fsolver_type * gsl_root_fsolver_falsepos;
GSL_VAR const gsl_root_fdfsolver_type * gsl_root_fdfsolver_newton;
GSL_VAR const gsl_root_fdfsolver_type * gsl_root_fdfsolver_secant;
GSL_VAR const gsl_root_fdfsolver_type * gsl_root_fdfsolver_steffenson;
__END_DECLS
#endif /* __GSL_ROOTS_H__ */
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