Epetra_SerialSymDenseMatrix.cpp

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//               Epetra: Linear Algebra Services Package
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#include "Epetra_SerialSymDenseMatrix.h"
//=============================================================================
Epetra_SerialSymDenseMatrix::Epetra_SerialSymDenseMatrix(void)
  : Epetra_SerialDenseMatrix(),
    Upper_(false),
    UPLO_('L')

{
}
//=============================================================================
Epetra_SerialSymDenseMatrix::Epetra_SerialSymDenseMatrix(Epetra_DataAccess CV_in, double *A_in, int LDA_in, int NumRowsCols)
  : Epetra_SerialDenseMatrix(CV_in, A_in, LDA_in, NumRowsCols, NumRowsCols),
    Upper_(false),
    UPLO_('L')

{
}
//=============================================================================
Epetra_SerialSymDenseMatrix::Epetra_SerialSymDenseMatrix(const Epetra_SerialSymDenseMatrix& Source)
  : Epetra_SerialDenseMatrix(Source),
    Upper_(Source.Upper_),
    UPLO_(Source.UPLO_)
{
}
//=============================================================================
Epetra_SerialSymDenseMatrix::~Epetra_SerialSymDenseMatrix()
{
}
//=============================================================================
void Epetra_SerialSymDenseMatrix::CopyUPLOMat(bool Upper_in, double * A_in, int LDA_in, int NumRows) {

  int i, j;
  double * ptr1;
  double * ptr2;

  if (Upper_in) {
    for (j=1; j<NumRows; j++) {
      ptr1 = A_in + j;
      ptr2 = A_in + j*LDA_in;
      for (i=0; i<j; i++) {
  *ptr1 = *ptr2++;
  ptr1+=LDA_in;
      }
    }
  }
  else {
    for (i=1; i<NumRows; i++) {
      ptr1 = A_in + i;
      ptr2 = A_in + i*LDA_in;
      for (j=0; j<i; j++) {
  *ptr2++ = *ptr1;
  ptr1+=LDA_in;
      }
    }
  }
}
//=============================================================================
double Epetra_SerialSymDenseMatrix::NormOne(void) const{

    return(Epetra_SerialSymDenseMatrix::NormInf());
}
//=============================================================================
double Epetra_SerialSymDenseMatrix::NormInf(void) const {

  int i, j;

  double anorm = 0.0;
  double * ptr;

  if (!Upper()) {
    for (j=0; j<N_; j++) {
      double sum = 0.0;
      ptr = A_ + j + j*LDA_;
      for (i=j; i<N_; i++) sum += std::abs(*ptr++);
      ptr = A_ + j;
      for (i=0; i<j; i++) {
  sum += std::abs(*ptr);
  ptr += LDA_;
      }
      anorm = EPETRA_MAX(anorm, sum);
    }
  }
  else {
    for (j=0; j<N_; j++) {
      double sum = 0.0;
      ptr = A_ + j*LDA_;
      for (i=0; i<j; i++) sum += std::abs(*ptr++);
      ptr = A_ + j + j*LDA_;
      for (i=j; i<N_; i++) {
  sum += std::abs(*ptr);
  ptr += LDA_;
      }
      anorm = EPETRA_MAX(anorm, sum);
    }
  }
  UpdateFlops(N_*N_);
  return(anorm);
}

//=============================================================================
int Epetra_SerialSymDenseMatrix::Scale(double ScalarA) {

  int i, j;

  double * ptr;

  if (!Upper()) {
    for (j=0; j<N_; j++) {
      ptr = A_ + j + j*LDA_;
      for (i=j; i<N_; i++) {*ptr = *ptr * ScalarA; ptr++;}
    }
  }
  else {
    for (j=0; j<N_; j++) {
      ptr = A_ + j*LDA_;
      for (i=0; i<j; i++) {*ptr = *ptr * ScalarA; ptr++;}
    }
  }
  UpdateFlops(N_*(N_+1)/2);
  return(0);
}