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// Gmsh - Copyright (C) 1997-2020 C. Geuzaine, J.-F. Remacle
//
// See the LICENSE.txt file for license information. Please report all
// issues on https://gitlab.onelab.info/gmsh/gmsh/issues.
#include "GmshConfig.h"
#include <string.h>
#if defined(HAVE_PETSC)
#include "petsc.h"
#include "linearSystemPETSc.h"
#include "fullMatrix.h"
#include <stdlib.h>
#include "GmshMessage.h"
#include "linearSystemPETSc.hpp"
template class linearSystemPETSc<double>;
#ifdef PETSC_USE_COMPLEX
template class linearSystemPETSc<std::complex<double> >;
// this specialization will cast to a double (take the real part) if "val" is a
// double wheras Petsc is built in complex mode.
template <>
void linearSystemPETSc<double>::getFromRightHandSide(int row, double &val) const
{
PetscScalar *tmp;
_check(VecGetArray(_b, &tmp));
PetscScalar s = tmp[row];
_check(VecRestoreArray(_b, &tmp));
val = s.real();
}
// this specialization will cast to a double (take the real part) if "val" is a
// double wheras Petsc is built in complex mode.
template <>
void linearSystemPETSc<double>::getFromSolution(int row, double &val) const
{
PetscScalar *tmp;
_check(VecGetArray(_x, &tmp));
PetscScalar s = tmp[row];
_check(VecRestoreArray(_x, &tmp));
val = s.real();
}
#endif
template <>
int linearSystemPETSc<fullMatrix<double> >::_getBlockSizeFromParameters() const
{
if(_parameters.find("blockSize") == _parameters.end())
Msg::Error("'blockSize' parameters must be set for linearSystemPETScBlock");
int blockSize =
strtol(_parameters.find("blockSize")->second.c_str(), NULL, 10);
return blockSize;
}
template <>
void linearSystemPETSc<fullMatrix<double> >::addToMatrix(
int row, int col, const fullMatrix<double> &val)
{
if(!_entriesPreAllocated) preAllocateEntries();
PetscInt i = row, j = col;
#ifdef PETSC_USE_COMPLEX
fullMatrix<std::complex<double> > modval(val.size1(), val.size2());
for(int ii = 0; ii < val.size1(); ii++) {
for(int jj = 0; jj < val.size1(); jj++) {
modval(ii, jj) = val(ii, jj);
}
}
MatSetValuesBlocked(_a, 1, &i, 1, &j, modval.getDataPtr(), ADD_VALUES);
#else
MatSetValuesBlocked(_a, 1, &i, 1, &j, val.getDataPtr(), ADD_VALUES);
#endif
_valuesNotAssembled = true;
}
template <>
void linearSystemPETSc<fullMatrix<double> >::addToRightHandSide(
int row, const fullMatrix<double> &val, int ith)
{
if(!_entriesPreAllocated) preAllocateEntries();
int blockSize;
_check(MatGetBlockSize(_a, &blockSize));
for(int ii = 0; ii < blockSize; ii++) {
PetscInt i = row * blockSize + ii;
PetscScalar v = val(ii, 0);
VecSetValues(_b, 1, &i, &v, ADD_VALUES);
}
}
template <>
void linearSystemPETSc<fullMatrix<double> >::getFromRightHandSide(
int row, fullMatrix<double> &val) const
{
int blockSize;
_check(MatGetBlockSize(_a, &blockSize));
for(int i = 0; i < blockSize; i++) {
int ii = row * blockSize + i;
#ifdef PETSC_USE_COMPLEX
PetscScalar s;
VecGetValues(_b, 1, &ii, &s);
val(i, 0) = s.real();
#else
VecGetValues(_b, 1, &ii, &val(i, 0));
#endif
}
}
template <>
void linearSystemPETSc<fullMatrix<double> >::addToSolution(
int row, const fullMatrix<double> &val)
{
int blockSize;
_check(MatGetBlockSize(_a, &blockSize));
for(int ii = 0; ii < blockSize; ii++) {
PetscInt i = row * blockSize + ii;
PetscScalar v = val(ii, 0);
VecSetValues(_x, 1, &i, &v, ADD_VALUES);
}
}
template <>
void linearSystemPETSc<fullMatrix<double> >::getFromSolution(
int row, fullMatrix<double> &val) const
{
int blockSize;
_check(MatGetBlockSize(_a, &blockSize));
for(int i = 0; i < blockSize; i++) {
int ii = row * blockSize + i;
#ifdef PETSC_USE_COMPLEX
PetscScalar s;
VecGetValues(_x, 1, &ii, &s);
val(i, 0) = s.real();
#else
VecGetValues(_x, 1, &ii, &val(i, 0));
#endif
}
}
template class linearSystemPETSc<fullMatrix<double> >;
#endif // HAVE_PETSC
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