fvar_a39.cpp

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#include "fvar.hpp"

void DF_dv_cdble_diff(void);

dvar_vector operator-(const dvar_vector& t1, const double x)
{
  gradient_structure* gs = gradient_structure::_instance;
  gs->RETURN_ARRAYS_INCREMENT();

  dvar_vector tmp(t1.indexmin(),t1.indexmax());
  save_identifier_string("ucbb");
  for (int i=t1.indexmin(); i<=t1.indexmax(); i++)
  {
    tmp.elem_value(i)=t1.elem_value(i)-x;
  }
  DF_FILE* fp = gradient_structure::fp;
  fp->save_dvar_vector_position(tmp);
  fp->save_dvar_vector_position(t1);
  save_identifier_string("dduu");
  gs->RETURN_ARRAYS_DECREMENT();
  gradient_structure::GRAD_STACK1->set_gradient_stack(DF_dv_cdble_diff);
  return(tmp);
}

void DF_dv_cdble_diff(void)
{
  DF_FILE* fp = gradient_structure::fp;

  verify_identifier_string("dduu");
  dvar_vector_position t1_pos=fp->restore_dvar_vector_position();
  dvar_vector_position tmp_pos=fp->restore_dvar_vector_position();
  dvector dftmp=restore_dvar_vector_derivatives(tmp_pos);
  dvector dft1(t1_pos.indexmin(),t1_pos.indexmax());
  verify_identifier_string("ucbb");
  //double xinv=1./x;
  for (int i=t1_pos.indexmax(); i>=t1_pos.indexmin(); i--)
  {
    // tmp.elem_value(i)=t1.elem_value(i)-value(x);
    //tmp.elem_value(i)=value(x)*t1.elem_value(i)/value(x);
    dft1(i)=dftmp(i);
  }
  dft1.save_dvector_derivatives(t1_pos);
}