GRASS GIS 8 Programmer's Manual  8.5.0dev(2024)-d6dec75dd4
gmath.h
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1 /******************************************************************************
2  * gmath.h
3  * Top level header file for gmath units
4 
5  * @Copyright David D.Gray <ddgray@armadce.demon.co.uk>
6  * 27th. Sep. 2000
7  * Last updated: $Id$
8  *
9 
10  * This file is part of GRASS GIS. It is free software. You can
11  * redistribute it and/or modify it under the terms of
12  * the GNU General Public License as published by the Free Software
13  * Foundation; either version 2 of the License, or (at your option)
14  * any later version.
15 
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19  * GNU General Public License for more details.
20 
21  ******************************************************************************/
22 
23 #ifndef GRASS_GMATH_H
24 #define GRASS_GMATH_H
25 
26 #include <grass/config.h>
27 
28 #ifdef CTYPESGEN
29 #undef __attribute__
30 #define __attribute__(x)
31 #endif
32 
33 #include <stddef.h>
34 
35 /*solver names */
36 #define G_MATH_SOLVER_DIRECT_GAUSS "gauss"
37 #define G_MATH_SOLVER_DIRECT_LU "lu"
38 #define G_MATH_SOLVER_DIRECT_CHOLESKY "cholesky"
39 #define G_MATH_SOLVER_ITERATIVE_JACOBI "jacobi"
40 #define G_MATH_SOLVER_ITERATIVE_SOR "sor"
41 #define G_MATH_SOLVER_ITERATIVE_CG "cg"
42 #define G_MATH_SOLVER_ITERATIVE_PCG "pcg"
43 #define G_MATH_SOLVER_ITERATIVE_BICGSTAB "bicgstab"
44 
45 /*preconditioner */
46 #define G_MATH_DIAGONAL_PRECONDITION 1
47 #define G_MATH_ROWSCALE_ABSSUMNORM_PRECONDITION 2
48 #define G_MATH_ROWSCALE_EUKLIDNORM_PRECONDITION 3
49 #define G_MATH_ROWSCALE_MAXNORM_PRECONDITION 4
50 
51 /*!
52  * \brief The row vector of the sparse matrix
53  * */
54 typedef struct {
55  double *values; /*The non null values of the row */
56  unsigned int cols; /*Number of entries */
57  unsigned int *index; /*the index number */
58 } G_math_spvector;
59 
60 #include <grass/defs/gmath.h>
61 
62 #endif /* GRASS_GMATH_H */
G_math_spvector
The row vector of the sparse matrix.
Definition: gmath.h:54
G_math_spvector::values
double * values
Definition: gmath.h:55
G_math_spvector::cols
unsigned int cols
Definition: gmath.h:56
G_math_spvector::index
unsigned int * index
Definition: gmath.h:57