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// -*- C++ -*-
// ---------------------------------------------------------------------------
//
// This file is a part of the CLHEP - a Class Library for High Energy Physics.
// 
// This software written by Nobu Katayama and Mike Smyth, Cornell University.
//
// This is the definitions of the inline member functions of the
// HepMatrix class
//
#include <stdexcept>
namespace CLHEP {

inline HepMatrix::HepMatrix()
  : m(0), nrow(0), ncol(0), size_(0) {}

inline HepMatrix::HepMatrix_row HepMatrix::operator[] (int r)
#ifdef HEP_GNU_OPTIMIZED_RETURN
  return b(*this,r);
{
#else
{
  HepMatrix_row b(*this,r);
#endif
  return b;
}

inline const HepMatrix::HepMatrix_row_const HepMatrix::operator[] (int r) const
#ifdef HEP_GNU_OPTIMIZED_RETURN
  return b(*this,r);
{
#else
{
  HepMatrix_row_const b(*this,r);
#endif
  return b;
}

inline double &HepMatrix::HepMatrix_row::operator[](int c) {
#ifdef MATRIX_BOUND_CHECK
  if (_r<0 || _r>=_a.num_row() || c<0 || c>=_a.num_col())
    HepGenMatrix::error("Range error in HepMatrix::operator[][]");
#endif
  return *(_a.m.begin()+_r*_a.ncol+c);
}

inline const double &HepMatrix::HepMatrix_row_const::operator[](int c) const
{
#ifdef MATRIX_BOUND_CHECK
  if (_r<0 || _r>=_a.num_row() || c<0 || c>=_a.num_col())
    HepGenMatrix::error("Range error in HepMatrix::operator[][]");
#endif
  return *(_a.m.begin()+_r*_a.ncol+c);
}

inline HepMatrix::HepMatrix_row::HepMatrix_row(HepMatrix&a,int r) 
: _a(a) {
  _r = r;
}

inline HepMatrix::HepMatrix_row_const::HepMatrix_row_const 
(const HepMatrix&a, int r) 
   : _a(a) 
{
  _r = r;
}

// This function swaps two Matrices without doing a full copy.
inline void swap(HepMatrix &hm1,HepMatrix &hm2) {
  HepGenMatrix::swap(hm1.m,hm2.m);
/*** commented
  HepGenMatrix::swap(hm1.nrow,hm2.nrow);
  HepGenMatrix::swap(hm1.ncol,hm2.ncol);
  HepGenMatrix::swap(hm1.size_,hm2.size_);
*/
}

  /*-ap inline */ HepMatrix HepMatrix::inverse(int &ierr) const
#ifdef HEP_GNU_OPTIMIZED_RETURN
  return mTmp(*this);
{
#else
{
  HepMatrix mTmp(*this);
#endif
  mTmp.invert(ierr);
  return mTmp;
}

inline HepMatrix HepMatrix::inverse() const {
  int ierr;
  HepMatrix mt=inverse(ierr);
  if (ierr) throw std::runtime_error("Error in HepMatrix inversion");
  return mt;
}

inline void HepMatrix::invert() {
  int ierr;
  invert(ierr);
  if (ierr) throw std::runtime_error("Error in HepMatrix inversion");
}

}  // namespace CLHEP