C++ pod_vector::extend方法代码示例

	/*! Change number of sets, set end, and initialize all sets as empty

	If \c n_set_in is zero, any memory currently allocated for this object 
	is freed. Otherwise, new memory may be allocated for the sets (if needed).

	\param n_set_in
	is the number of sets in this vector of sets.

	\param end_in
	is the maximum element plus one (the minimum element is 0).
	*/
	void resize(size_t n_set_in, size_t end_in) 
	{
		n_set_          = n_set_in;
		end_            = end_in;
		if( n_set_ == 0 )
		{	data_.free();
			return;
		}
		// now start a new vector with empty sets
		Pack zero(0);
		data_.erase();

		n_pack_         = ( 1 + (end_ - 1) / n_bit_ );
		size_t i        = n_set_ * n_pack_;

		if( i > 0 )
		{	data_.extend(i);
			while(i--)
				data_[i] = zero;
		}

		// values that signify past end of list
		next_index_   = n_set_;
		next_element_ = end_;
	}

	/*! Change number of sets, set end, and initialize all sets as empty

	Any memory currently allocated for this object is freed. If both
	\a n_set_in and \a end_in are non-zero new memory is allocated, otherwise
	no new memory is allocated for the object.

	\param n_set_in
	is the number of sets in this vector of sets.

	\param end_in
	is the maximum element plus one (the minimum element is 0).
	*/
	void resize(size_t n_set_in, size_t end_in) 
	{	Pack zero(0);
		data_.erase();

		n_set_          = n_set_in;
		end_            = end_in;
		n_pack_         = ( 1 + (end_ - 1) / n_bit_ );
		size_t i        = n_set_ * n_pack_;

		if( i > 0 )
		{	data_.extend(i);
			while(i--)
				data_[i] = zero;
		}

		// values that signify past end of list
		next_index_   = n_set_;
		next_element_ = end_;
	}

void my_init(vector<bool> keepcol){
  Partial.extend(num_var_tape_ * 1);
  arg_mark_.resize(play_.op_arg_rec_.size());
  for(size_t i=0;i<arg_mark_.size();i++)arg_mark_[i]=false;
  /* Run a reverse test-sweep to store pointers once */
  tape_point tp;
  play_.reverse_start(tp.op, tp.op_arg, tp.op_index, tp.var_index);
  tp_.resize(tp.op_index+1);
  var2op_.resize(tp.var_index+1);
  op_mark_.resize(tp.op_index+1);
  for(size_t i=0;i<op_mark_.size();i++)op_mark_[i]=0;
  user_region_mark_.resize(tp.op_index+1);
  for(size_t i=0;i<user_region_mark_.size();i++)user_region_mark_[i]=0;
  tp_[tp.op_index]=tp;
  /* 1. We need to be able to find out, for a given variable, what operator created 
     the variable. This is easiest done by looping through the _operators_ because for a 
     given op we have access to all the resulting variables it creates.
     2. We precompute the a vector of "tape_points" so that instead of calling 
     "reverse_next", we simply get the next tape entry by tp_[i-1].
  */
  while(tp.op != BeginOp ){ /* tp.op_index is decremented by one in each iteration ... */
    // printTP(tp); /* For debugging */
    play_.reverse_next(tp.op, tp.op_arg, tp.op_index, tp.var_index);
    /* Csum is special case - see remarks in player.hpp and reverse_sweep.hpp */
    if(tp.op == CSumOp)play_.reverse_csum(tp.op, tp.op_arg, tp.op_index, tp.var_index);
    for(size_t i=0;i<NumRes(tp.op);i++)var2op_[tp.var_index-i]=tp.op_index;
    tp_[tp.op_index]=tp;
    markArgs(tp);
  }
  /* Lookup table: is tape_point within a UserOp region? */
  bool user_within=false;
  user_region_.resize(tp_.size());
  for(size_t i=0;i<tp_.size();i++){
    if(tp_[i].op==UserOp){
      user_region_[i]=true;
      user_within=!user_within;	
    } else {
      user_region_[i]=user_within;
    }
  }

  /* Lookup table: is tape_point a constant (=only fixed effect dependent) ? */
  constant_tape_point_.resize(tp_.size());
  int indep_var_number=0;
  for(size_t i=0;i<tp_.size();i++){
    if(tp_[i].op==InvOp){ /* All independent variables are marked according to being
			     random or fixed effect */
      constant_tape_point_[i]=!keepcol[indep_var_number];
      indep_var_number++;
    } else { /* Mark operator as constant if _all_ arguments are constant */
      constant_tape_point_[i] = is_tape_point_constant(i);
    }

    //std::cout << constant_tape_point_[i] << " "; printTP(tp_[i]);

  }
  // std::cout << "Total:   " << constant_tape_point_.size() << "\n";
  // int sum=0; for(int i=0;i<constant_tape_point_.size();i++)sum+=constant_tape_point_[i];
  // std::cout << "Constant:" << sum << "\n";


  // Calculate pattern
  int m=Range();
  colpattern.resize(m);
  for(int i=0;i<m;i++)my_pattern(i);
  for(size_t i=0;i<op_mark_.size();i++)op_mark_[i]=0; /* remember to reset marks */
  for(size_t i=0;i<user_region_mark_.size();i++)user_region_mark_[i]=0; /* remember to reset marks */
}