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// $Id: G4ErrorSymMatrix.icc,v 1.2 2007/06/01 12:43:28 gcosmo Exp $
// GEANT4 tag $Name: geant4-09-02-ref-02 $
//
// ------------------------------------------------------------
//      GEANT 4 class inline implementation
// ------------------------------------------------------------


inline G4ErrorSymMatrix::G4ErrorSymMatrix() 
  : m(0), nrow(0), size(0)
{
}

inline G4int G4ErrorSymMatrix::num_row() const
{
  return nrow;
}

inline G4int G4ErrorSymMatrix::num_col() const
{
  return nrow;
}

inline G4int G4ErrorSymMatrix::num_size() const
{
  return size;
}

inline G4double & G4ErrorSymMatrix::fast(G4int row,G4int col)
{
  return *(m.begin()+(row*(row-1))/2+(col-1));
}

inline const G4double & G4ErrorSymMatrix::fast(G4int row,G4int col) const
{
  return *(m.begin()+(row*(row-1))/2+(col-1));
}

inline G4double &
G4ErrorSymMatrix::operator()(G4int row, G4int col)
{
  return (row>=col? fast(row,col) : fast(col,row));
}

inline const G4double &
G4ErrorSymMatrix::operator()(G4int row, G4int col) const 
{
  return (row>=col? fast(row,col) : fast(col,row));
}

inline void G4ErrorSymMatrix::assign(const G4ErrorSymMatrix &m2) 
{
  (*this)=m2;
}

inline G4ErrorSymMatrix G4ErrorSymMatrix::T() const
{
  return G4ErrorSymMatrix(*this);
}

inline G4ErrorSymMatrix::G4ErrorSymMatrix_row
G4ErrorSymMatrix::operator[] (G4int r)
{
  G4ErrorSymMatrix_row b(*this,r);
  return b;
}

inline G4ErrorSymMatrix::G4ErrorSymMatrix_row_const
G4ErrorSymMatrix::operator[] (G4int r) const
{
  const G4ErrorSymMatrix_row_const b(*this,r);
  return b;
}

inline G4double &G4ErrorSymMatrix::G4ErrorSymMatrix_row::operator[](G4int c)
{
   if (_r >= c )
   {
      return *(_a.m.begin() + (_r+1)*_r/2 + c);
   }
   else
   {
      return *(_a.m.begin() + (c+1)*c/2 + _r);
   }
}

inline const G4double &
G4ErrorSymMatrix::G4ErrorSymMatrix_row_const::operator[](G4int c) const 
{
   if (_r >= c )
   {
      return *(_a.m.begin() + (_r+1)*_r/2 + c);
   }
   else
   {
      return *(_a.m.begin() + (c+1)*c/2 + _r);
   }
}

inline G4ErrorSymMatrix::
G4ErrorSymMatrix_row::G4ErrorSymMatrix_row(G4ErrorSymMatrix &a, G4int r) 
   : _a(a), _r(r)
{}

inline G4ErrorSymMatrix::
G4ErrorSymMatrix_row_const::G4ErrorSymMatrix_row_const
(const G4ErrorSymMatrix&a,G4int r) 
   : _a(a), _r(r)
{}

inline G4ErrorSymMatrix G4ErrorSymMatrix::inverse(G4int &ifail) const
{
  G4ErrorSymMatrix mTmp(*this);
  mTmp.invert(ifail);
  return mTmp;
}