bool CommonSolverUmfpack::solve(Matrix *mat, double *res)
{
printf("UMFPACK solver\n");
CSCMatrix *Acsc = NULL;
if (CooMatrix *mcoo = dynamic_cast<CooMatrix*>(mat))
Acsc = new CSCMatrix(mcoo);
else if (CSCMatrix *mcsc = dynamic_cast<CSCMatrix*>(mat))
Acsc = mcsc;
else if (CSRMatrix *mcsr = dynamic_cast<CSRMatrix*>(mat))
Acsc = new CSCMatrix(mcsr);
else
_error("Matrix type not supported.");
int nnz = Acsc->get_nnz();
int size = Acsc->get_size();
// solve
umfpack_di_defaults(control_array);
/* symbolic analysis */
void *symbolic, *numeric;
int status_symbolic = umfpack_di_symbolic(size, size,
Acsc->get_Ap(), Acsc->get_Ai(), NULL, &symbolic,
control_array, info_array);
print_status(status_symbolic);
/* LU factorization */
int status_numeric = umfpack_di_numeric(Acsc->get_Ap(), Acsc->get_Ai(), Acsc->get_Ax(), symbolic, &numeric,
control_array, info_array);
print_status(status_numeric);
umfpack_di_free_symbolic(&symbolic);
double *x = new double[size];
/* solve system */
int status_solve = umfpack_di_solve(UMFPACK_A,
Acsc->get_Ap(), Acsc->get_Ai(), Acsc->get_Ax(), x, res, numeric,
control_array, info_array);
print_status(status_solve);
umfpack_di_free_numeric(&numeric);
if (symbolic) umfpack_di_free_symbolic(&symbolic);
if (numeric) umfpack_di_free_numeric(&numeric);
memcpy(res, x, size*sizeof(double));
delete[] x;
if (!dynamic_cast<CSCMatrix*>(mat))
delete Acsc;
}
bool CommonSolverSparseLib::_solve(Matrix *mat, double *res)
{
printf("SparseLib++ solver\n");
CSCMatrix *Acsc = NULL;
if (CooMatrix *mcoo = dynamic_cast<CooMatrix*>(mat))
Acsc = new CSCMatrix(mcoo);
else if (DenseMatrix *mden = dynamic_cast<DenseMatrix *>(mat))
Acsc = new CSCMatrix(mden);
else if (CSCMatrix *mcsc = dynamic_cast<CSCMatrix*>(mat))
Acsc = mcsc;
else if (CSRMatrix *mcsr = dynamic_cast<CSRMatrix*>(mat))
Acsc = new CSCMatrix(mcsr);
else
_error("Matrix type not supported.");
int nnz = Acsc->get_nnz();
int size = Acsc->get_size();
CompCol_Mat_double Acc = CompCol_Mat_double(size, size, nnz,
Acsc->get_Ax(), Acsc->get_Ai(), Acsc->get_Ap());
// rhs
VECTOR_double rhs(res, size);
// preconditioner
CompCol_ILUPreconditioner_double ILU(Acc);
VECTOR_double xv = ILU.solve(rhs);
// method
int result = -1;
switch (method)
{
case HERMES_CommonSolverSparseLibSolver_ConjugateGradientSquared:
result = CGS(Acc, xv, rhs, ILU, maxiter, tolerance);
break;
case CommonSolverSparseLibSolver_RichardsonIterativeRefinement:
result = IR(Acc, xv, rhs, ILU, maxiter, tolerance);
break;
default:
_error("SparseLib++ error. Method is not defined.");
}
if (result == 0)
printf("SparseLib++ solver: maxiter: %i, tol: %e\n", maxiter, tolerance);
else
_error("SparseLib++ error.");
double *x;
x = (double*) malloc(size * sizeof(double));
for (int i = 0 ; i < xv.size() ; i++)
x[i] = xv(i);
memcpy(res, x, size*sizeof(double));
delete[] x;
if (!dynamic_cast<CSCMatrix*>(mat))
delete Acsc;
}