gmath.h

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/******************************************************************************
 * gmath.h
 * Top level header file for gmath units
 
 * @Copyright David D.Gray <ddgray@armadce.demon.co.uk>
 * 27th. Sep. 2000
 * Last updated: $Id$
 *
 
 * This file is part of GRASS. It 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.
 
 ******************************************************************************/
 
#ifndef GRASS_GMATH_H
#define GRASS_GMATH_H
 
#include <grass/config.h>
 
#ifdef CTYPESGEN
#undef __attribute__
#define __attribute__(x)
#endif
 
#include <stddef.h>
 
/*solver names */
#define G_MATH_SOLVER_DIRECT_GAUSS              "gauss"
#define G_MATH_SOLVER_DIRECT_LU                 "lu"
#define G_MATH_SOLVER_DIRECT_CHOLESKY           "cholesky"
#define G_MATH_SOLVER_ITERATIVE_JACOBI          "jacobi"
#define G_MATH_SOLVER_ITERATIVE_SOR             "sor"
#define G_MATH_SOLVER_ITERATIVE_CG              "cg"
#define G_MATH_SOLVER_ITERATIVE_PCG             "pcg"
#define G_MATH_SOLVER_ITERATIVE_BICGSTAB        "bicgstab"
 
/*preconditioner */
#define G_MATH_DIAGONAL_PRECONDITION            1
#define G_MATH_ROWSCALE_ABSSUMNORM_PRECONDITION 2
#define G_MATH_ROWSCALE_EUKLIDNORM_PRECONDITION 3
#define G_MATH_ROWSCALE_MAXNORM_PRECONDITION    4
 
/*!
 * \brief The row vector of the sparse matrix
 * */
typedef struct {
    double *values;      /*The non null values of the row */
    unsigned int cols;   /*Number of entries */
    unsigned int *index; /*the index number */
} G_math_spvector;
 
#include <grass/defs/gmath.h>
 
#endif /* GRASS_GMATH_H */