vector.tcc

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    _M_insert_aux(iterator __position, const _Tp& __x)
    {
      if (this->_M_impl._M_finish != this->_M_impl._M_end_of_storage)
	{
	  this->_M_impl.construct(this->_M_impl._M_finish,
				  *(this->_M_impl._M_finish - 1));
	  ++this->_M_impl._M_finish;
	  _Tp __x_copy = __x;
	  std::copy_backward(__position,
			     iterator(this->_M_impl._M_finish-2),
			     iterator(this->_M_impl._M_finish-1));
	  *__position = __x_copy;
	}
      else
	{
	  const size_type __old_size = size();
	  if (__old_size == this->max_size())
	    __throw_length_error(__N("vector::_M_insert_aux"));

	  // When sizeof(value_type) == 1 and __old_size > size_type(-1)/2
	  // __len overflows: if we don't notice and _M_allocate doesn't
	  // throw we crash badly later.
	  size_type __len = __old_size != 0 ? 2 * __old_size : 1;	  
	  if (__len < __old_size)
	    __len = this->max_size();

	  iterator __new_start(this->_M_allocate(__len));
	  iterator __new_finish(__new_start);
	  try
	    {
	      __new_finish =
		std::__uninitialized_copy_a(iterator(this->_M_impl._M_start),
					    __position,
					    __new_start,
					    _M_get_Tp_allocator());
	      this->_M_impl.construct(__new_finish.base(), __x);
	      ++__new_finish;
	      __new_finish =
		std::__uninitialized_copy_a(__position,
					    iterator(this->_M_impl._M_finish),
					    __new_finish,
					    _M_get_Tp_allocator());
	    }
	  catch(...)
	    {
	      std::_Destroy(__new_start, __new_finish, _M_get_Tp_allocator());
	      _M_deallocate(__new_start.base(),__len);
	      __throw_exception_again;
	    }
	  std::_Destroy(begin(), end(), _M_get_Tp_allocator());
	  _M_deallocate(this->_M_impl._M_start,
			this->_M_impl._M_end_of_storage
			- this->_M_impl._M_start);
	  this->_M_impl._M_start = __new_start.base();
	  this->_M_impl._M_finish = __new_finish.base();
	  this->_M_impl._M_end_of_storage = __new_start.base() + __len;
	}
    }

  template<typename _Tp, typename _Alloc>
    void
    vector<_Tp, _Alloc>::
    _M_fill_insert(iterator __position, size_type __n, const value_type& __x)
    {
      if (__n != 0)
	{
	  if (size_type(this->_M_impl._M_end_of_storage
			- this->_M_impl._M_finish) >= __n)
	    {
	      value_type __x_copy = __x;
	      const size_type __elems_after = end() - __position;
	      iterator __old_finish(this->_M_impl._M_finish);
	      if (__elems_after > __n)
		{
		  std::__uninitialized_copy_a(this->_M_impl._M_finish - __n,
					      this->_M_impl._M_finish,
					      this->_M_impl._M_finish,
					      _M_get_Tp_allocator());
		  this->_M_impl._M_finish += __n;
		  std::copy_backward(__position, __old_finish - __n,
				     __old_finish);
		  std::fill(__position, __position + __n, __x_copy);
		}
	      else
		{
		  std::__uninitialized_fill_n_a(this->_M_impl._M_finish,
						__n - __elems_after,
						__x_copy,
						_M_get_Tp_allocator());
		  this->_M_impl._M_finish += __n - __elems_after;
		  std::__uninitialized_copy_a(__position, __old_finish,
					      this->_M_impl._M_finish,
					      _M_get_Tp_allocator());
		  this->_M_impl._M_finish += __elems_after;
		  std::fill(__position, __old_finish, __x_copy);
		}
	    }
	  else
	    {
	      const size_type __old_size = size();
	      if (this->max_size() - __old_size < __n)
		__throw_length_error(__N("vector::_M_fill_insert"));
	      
	      // See _M_insert_aux above.
	      size_type __len = __old_size + std::max(__old_size, __n);
	      if (__len < __old_size)
		__len = this->max_size();

	      iterator __new_start(this->_M_allocate(__len));
	      iterator __new_finish(__new_start);
	      try
		{
		  __new_finish =
		    std::__uninitialized_copy_a(begin(), __position,
						__new_start,
						_M_get_Tp_allocator());
		  std::__uninitialized_fill_n_a(__new_finish, __n, __x,
						_M_get_Tp_allocator());
		  __new_finish += __n;
		  __new_finish =
		    std::__uninitialized_copy_a(__position, end(), __new_finish,
						_M_get_Tp_allocator());
		}
	      catch(...)
		{
		  std::_Destroy(__new_start, __new_finish,
				_M_get_Tp_allocator());
		  _M_deallocate(__new_start.base(), __len);
		  __throw_exception_again;
		}
	      std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish,
			    _M_get_Tp_allocator());
	      _M_deallocate(this->_M_impl._M_start,
			    this->_M_impl._M_end_of_storage
			    - this->_M_impl._M_start);
	      this->_M_impl._M_start = __new_start.base();
	      this->_M_impl._M_finish = __new_finish.base();
	      this->_M_impl._M_end_of_storage = __new_start.base() + __len;
	    }
	}
    }

  template<typename _Tp, typename _Alloc> template<typename _InputIterator>
    void
    vector<_Tp, _Alloc>::
    _M_range_insert(iterator __pos, _InputIterator __first,
		    _InputIterator __last, std::input_iterator_tag)
    {
      for (; __first != __last; ++__first)
	{
	  __pos = insert(__pos, *__first);
	  ++__pos;
	}
    }

  template<typename _Tp, typename _Alloc>
    template<typename _ForwardIterator>
      void
      vector<_Tp, _Alloc>::
      _M_range_insert(iterator __position, _ForwardIterator __first,
		      _ForwardIterator __last, std::forward_iterator_tag)
      {
	if (__first != __last)
	  {
	    const size_type __n = std::distance(__first, __last);
	    if (size_type(this->_M_impl._M_end_of_storage
			  - this->_M_impl._M_finish) >= __n)
	      {
		const size_type __elems_after = end() - __position;
		iterator __old_finish(this->_M_impl._M_finish);
		if (__elems_after > __n)
		  {
		    std::__uninitialized_copy_a(this->_M_impl._M_finish - __n,
						this->_M_impl._M_finish,
						this->_M_impl._M_finish,
						_M_get_Tp_allocator());
		    this->_M_impl._M_finish += __n;
		    std::copy_backward(__position, __old_finish - __n,
				       __old_finish);
		    std::copy(__first, __last, __position);
		  }
		else
		  {
		    _ForwardIterator __mid = __first;
		    std::advance(__mid, __elems_after);
		    std::__uninitialized_copy_a(__mid, __last,
						this->_M_impl._M_finish,
						_M_get_Tp_allocator());
		    this->_M_impl._M_finish += __n - __elems_after;
		    std::__uninitialized_copy_a(__position, __old_finish,
						this->_M_impl._M_finish,
						_M_get_Tp_allocator());
		    this->_M_impl._M_finish += __elems_after;
		    std::copy(__first, __mid, __position);
		  }
	      }
	    else
	      {
		const size_type __old_size = size();
		if (this->max_size() - __old_size < __n)
		  __throw_length_error(__N("vector::_M_range_insert"));	

		// See _M_insert_aux above.
		size_type __len = __old_size + std::max(__old_size, __n);
		if (__len < __old_size)
		  __len = this->max_size();

		iterator __new_start(this->_M_allocate(__len));
		iterator __new_finish(__new_start);
		try
		  {
		    __new_finish =
		      std::__uninitialized_copy_a(iterator(this->_M_impl._M_start),
						  __position,
						  __new_start,
						  _M_get_Tp_allocator());
		    __new_finish =
		      std::__uninitialized_copy_a(__first, __last, __new_finish,
						  _M_get_Tp_allocator());
		    __new_finish =
		      std::__uninitialized_copy_a(__position,
						  iterator(this->_M_impl._M_finish),
						  __new_finish,
						  _M_get_Tp_allocator());
		  }
		catch(...)
		  {
		    std::_Destroy(__new_start,__new_finish,
				  _M_get_Tp_allocator());
		    _M_deallocate(__new_start.base(), __len);
		    __throw_exception_again;
		  }
		std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish,
			      _M_get_Tp_allocator());
		_M_deallocate(this->_M_impl._M_start,
			      this->_M_impl._M_end_of_storage
			      - this->_M_impl._M_start);
		this->_M_impl._M_start = __new_start.base();
		this->_M_impl._M_finish = __new_finish.base();
		this->_M_impl._M_end_of_storage = __new_start.base() + __len;
	      }
	  }
      }
} // namespace std

#endif /* _VECTOR_TCC */