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/*
* Sparse linear solver.
* Copyright (C) 2004 Bruno Levy
* Copyright (C) 2005-2015 Blender Foundation
*
* 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 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.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* If you modify this software, you should include a notice giving the
* name of the person performing the modification, the date of modification,
* and the reason for such modification.
*/
/** \file
* \ingroup intern_eigen
*/
#pragma once
#include <stdbool.h>
#ifdef __cplusplus
extern "C" {
#endif
/* Solvers for Ax = b and AtAx = Atb */
typedef struct LinearSolver LinearSolver;
LinearSolver *EIG_linear_solver_new(int num_rows, int num_columns, int num_right_hand_sides);
LinearSolver *EIG_linear_least_squares_solver_new(int num_rows,
int num_columns,
int num_right_hand_sides);
void EIG_linear_solver_delete(LinearSolver *solver);
/* Variables (x). Any locking must be done before matrix construction. */
void EIG_linear_solver_variable_set(LinearSolver *solver, int rhs, int index, double value);
double EIG_linear_solver_variable_get(LinearSolver *solver, int rhs, int index);
void EIG_linear_solver_variable_lock(LinearSolver *solver, int index);
void EIG_linear_solver_variable_unlock(LinearSolver *solver, int index);
/* Matrix (A) and right hand side (b) */
void EIG_linear_solver_matrix_add(LinearSolver *solver, int row, int col, double value);
void EIG_linear_solver_right_hand_side_add(LinearSolver *solver, int rhs, int index, double value);
/* Solve. Repeated solves are supported, by changing b between solves. */
bool EIG_linear_solver_solve(LinearSolver *solver);
/* Debugging */
void EIG_linear_solver_print_matrix(LinearSolver *solver);
#ifdef __cplusplus
}
#endif
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