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
|
/* itersolve.c
*
* Copyright (C) 2014 Patrick Alken
*
* 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.
*/
#include <config.h>
#include <gsl/gsl_math.h>
#include <gsl/gsl_vector.h>
#include <gsl/gsl_matrix.h>
#include <gsl/gsl_errno.h>
#include <gsl/gsl_spmatrix.h>
#include <gsl/gsl_spblas.h>
#include <gsl/gsl_splinalg.h>
gsl_splinalg_itersolve *
gsl_splinalg_itersolve_alloc(const gsl_splinalg_itersolve_type *T,
const size_t n, const size_t m)
{
gsl_splinalg_itersolve *w;
w = calloc(1, sizeof(gsl_splinalg_itersolve));
if (w == NULL)
{
GSL_ERROR_NULL("failed to allocate space for itersolve struct",
GSL_ENOMEM);
}
w->type = T;
w->normr = 0.0;
w->state = w->type->alloc(n, m);
if (w->state == NULL)
{
gsl_splinalg_itersolve_free(w);
GSL_ERROR_NULL("failed to allocate space for itersolve state",
GSL_ENOMEM);
}
return w;
} /* gsl_splinalg_itersolve_alloc() */
void
gsl_splinalg_itersolve_free(gsl_splinalg_itersolve *w)
{
RETURN_IF_NULL(w);
if (w->state)
w->type->free(w->state);
free(w);
}
const char *
gsl_splinalg_itersolve_name(const gsl_splinalg_itersolve *w)
{
return w->type->name;
}
int
gsl_splinalg_itersolve_iterate(const gsl_spmatrix *A, const gsl_vector *b,
const double tol, gsl_vector *x,
gsl_splinalg_itersolve *w)
{
int status = w->type->iterate(A, b, tol, x, w->state);
/* store current residual */
w->normr = w->type->normr(w->state);
return status;
}
double
gsl_splinalg_itersolve_normr(const gsl_splinalg_itersolve *w)
{
return w->normr;
}
|
