/**
 * @file   solver.cpp
 * @author Julian Iseringhausen <isering@ins.uni-bonn.de>
 * @date   Mon Apr 18 13:10:55 2011
 *
 * @brief  VMG::Solver
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "solver/solver.hpp"

using namespace VMG;

void Solver::Run(Grid& sol, Grid& rhs)
{
#ifdef DEBUG_MATRIX_CHECKS
  sol.IsConsistent();
  rhs.IsConsistent();
#endif

#ifdef DEBUG
  sol.IsCompatible(rhs);
#endif

  Comm* comm = MG::GetComm();

  Grid& rhsGlobal = comm->GetGlobalCoarseGrid(*rhs.Father());

  this->Realloc(rhsGlobal);
  this->AssembleMatrix(rhsGlobal);
  this->Compute();
  this->ExportSol(sol, rhs);
}

void Solver::Realloc(int n)
{
  //Reallocate memory if necessary
  this->size = n;

  if (static_cast<int>(A.size()) < n*n)
    A.resize(n*n);

  if (static_cast<int>(b.size()) < n)
    b.resize(n);

  if (static_cast<int>(x.size()) < n)
    x.resize(n);
}

void Solver::Realloc(Grid& sol)
{
  this->Realloc(sol.Global().SizeGlobal().Product());
}