stl_deque.c

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template <class _Tp, class _Alloc, size_t __bufsiz>
void deque<_Tp,_Alloc,__bufsiz>::clear()
{
  __stl_debug_do(_Invalidate_all());
  for (_Map_pointer __node = _M_start._M_node + 1;
       __node < _M_finish._M_node;
       ++__node) {
    destroy(*__node, *__node + __buf_traits::_buf_size);
    _M_map_size.deallocate(*__node, __buf_traits::_buf_size);
  }

  if (_M_start._M_node != _M_finish._M_node) {
    destroy(_M_start._M_cur, _M_start._M_last);
    destroy(_M_finish._M_first, _M_finish._M_cur);
    _M_map_size.deallocate(_M_finish._M_first, __buf_traits::_buf_size);
  }
  else
    destroy(_M_start._M_cur, _M_finish._M_cur);

  _M_finish = _M_start;
  __stl_debug_do(_M_orphan_finish());
}

// Precondition: _M_start and _M_finish have already been initialized,
// but none of the deque's elements have yet been constructed.
template <class _Tp, class _Alloc, size_t __bufsiz>
void 
deque<_Tp,_Alloc,__bufsiz>::_M_fill_initialize(const value_type& __value) {
  _Map_pointer __cur;
  __stl_debug_do(_M_iter_list._Safe_init(&_M_start));
  __stl_debug_do(_Init_bounds());
  __STL_TRY {
    for (__cur = _M_start._M_node; __cur < _M_finish._M_node; ++__cur)
      uninitialized_fill(*__cur, *__cur + __buf_traits::_buf_size, __value);
    uninitialized_fill(_M_finish._M_first, _M_finish._M_cur, __value);
  }
# ifdef __STL_DEBUG
  __STL_UNWIND(destroy(_M_start, iterator(&_M_iter_list,*__cur, __cur)));
# else
  __STL_UNWIND(destroy(_M_start, iterator(*__cur, __cur)));
# endif
}


// Called only if _M_finish._M_cur == _M_finish._M_last - 1.
template <class _Tp, class _Alloc, size_t __bufsiz>
void
deque<_Tp,_Alloc,__bufsiz>::_M_push_back_aux(const value_type& __t)
{
  value_type __t_copy = __t;
  _M_reserve_map_at_back();
  *(_M_finish._M_node + 1) = _M_map_size.allocate(__buf_traits::_buf_size);
  __STL_TRY {
    construct(_M_finish._M_cur, __t_copy);
    _M_finish._M_set_node(_M_finish._M_node + 1);
    _M_finish._M_cur = _M_finish._M_first;
  }
  __STL_UNWIND(_M_map_size.deallocate(*(_M_finish._M_node + 1), 
				      __buf_traits::_buf_size));
}

// Called only if _M_finish._M_cur == _M_finish._M_last - 1.
template <class _Tp, class _Alloc, size_t __bufsiz>
void
deque<_Tp,_Alloc,__bufsiz>::_M_push_back_aux()
{
  _M_reserve_map_at_back();
  *(_M_finish._M_node + 1) = _M_map_size.allocate(__buf_traits::_buf_size);
  __STL_TRY {
    construct(_M_finish._M_cur);
    _M_finish._M_set_node(_M_finish._M_node + 1);
    _M_finish._M_cur = _M_finish._M_first;
  }
  __STL_UNWIND(_M_map_size.deallocate(*(_M_finish._M_node + 1), 
				      __buf_traits::_buf_size));
}

// Called only if _M_start._M_cur == _M_start._M_first.
template <class _Tp, class _Alloc, size_t __bufsiz>
void 
deque<_Tp,_Alloc,__bufsiz>::_M_push_front_aux(const value_type& __t)
{
  value_type __t_copy = __t;
  _M_reserve_map_at_front();
  *(_M_start._M_node - 1) = _M_map_size.allocate(__buf_traits::_buf_size);
  __STL_TRY {
    _M_start._M_set_node(_M_start._M_node - 1);
    _M_start._M_cur = _M_start._M_last - 1;
    construct(_M_start._M_cur, __t_copy);
  }
  __STL_UNWIND((++_M_start, 
		_M_map_size.deallocate(*(_M_start._M_node - 1), __buf_traits::_buf_size)));
} 

// Called only if _M_start._M_cur == _M_start._M_first.
template <class _Tp, class _Alloc, size_t __bufsiz>
void 
deque<_Tp,_Alloc,__bufsiz>::_M_push_front_aux()
{
  _M_reserve_map_at_front();
  *(_M_start._M_node - 1) = _M_map_size.allocate(__buf_traits::_buf_size);
  __STL_TRY {
    _M_start._M_set_node(_M_start._M_node - 1);
    _M_start._M_cur = _M_start._M_last - 1;
    construct(_M_start._M_cur);
  }
  __STL_UNWIND((++_M_start, _M_map_size.deallocate(*(_M_start._M_node - 1), 
						   __buf_traits::_buf_size )));
} 

// Called only if _M_finish._M_cur == _M_finish._M_first.
template <class _Tp, class _Alloc, size_t __bufsiz>
void 
deque<_Tp,_Alloc,__bufsiz>::_M_pop_back_aux()
{
  _M_map_size.deallocate(_M_finish._M_first, __buf_traits::_buf_size);
  _M_finish._M_set_node(_M_finish._M_node - 1);
  _M_finish._M_cur = _M_finish._M_last - 1;
  destroy(_M_finish._M_cur);
}

// Called only if _M_start._M_cur == _M_start._M_last - 1.  Note that 
// if the deque has at least one element (a precondition for this member 
// function), and if _M_start._M_cur == _M_start._M_last, then the deque 
// must have at least two nodes.
template <class _Tp, class _Alloc, size_t __bufsiz>
void 
deque<_Tp,_Alloc,__bufsiz>::_M_pop_front_aux()
{
  destroy(_M_start._M_cur);
  _M_map_size.deallocate(_M_start._M_first, __buf_traits::_buf_size);
  _M_start._M_set_node(_M_start._M_node + 1);
  _M_start._M_cur = _M_start._M_first;
}      

template <class _Tp, class _Alloc, size_t __bufsiz>
__iterator__
deque<_Tp,_Alloc,__bufsiz>::_M_insert_aux(__iterator__ __pos,
                                           const value_type& __x) {
  difference_type __index = __pos - _M_start;
  value_type __x_copy = __x;
  if (__index < difference_type(size() / 2)) {
    push_front(front());
    iterator __front1 = _M_start;
    ++__front1;
    iterator __front2 = __front1;
    ++__front2;
    __pos = _M_start + __index;
    iterator __pos1 = __pos;
    ++__pos1;
    copy(__front2, __pos1, __front1);
  }
  else {
    push_back(back());
    iterator __back1 = _M_finish;
    --__back1;
    iterator __back2 = __back1;
    --__back2;
    __pos = _M_start + __index;
    copy_backward(__pos, __back2, __back1);
  }
  *__pos = __x_copy;
  return __pos;
}

template <class _Tp, class _Alloc, size_t __bufsiz>
__iterator__
deque<_Tp,_Alloc,__bufsiz>::_M_insert_aux(__iterator__ __pos)
{
  difference_type __index = __pos - _M_start;
  if (__index < difference_type(size() / 2)) {
    push_front(front());
    iterator __front1 = _M_start;
    ++__front1;
    iterator __front2 = __front1;
    ++__front2;
    __pos = _M_start + __index;
    iterator __pos1 = __pos;
    ++__pos1;
    copy(__front2, __pos1, __front1);
  }
  else {
    push_back(back());
    iterator __back1 = _M_finish;
    --__back1;
    iterator __back2 = __back1;
    --__back2;
    __pos = _M_start + __index;
    copy_backward(__pos, __back2, __back1);
  }
  *__pos = value_type();
  return __pos;
}

template <class _Tp, class _Alloc, size_t __bufsiz>
void
deque<_Tp,_Alloc,__bufsiz>::_M_insert_aux(iterator __pos,
                                           size_type __n,
                                           const value_type& __x)
{
  const difference_type __elems_before = __pos - _M_start;
  size_type __length = size();
  value_type __x_copy = __x;
  if (__elems_before < difference_type(__length / 2)) {
    iterator __new_start = _M_reserve_elements_at_front(__n);
    iterator __old_start = _M_start;
    __pos = _M_start + __elems_before;
    __STL_TRY {
      if (__elems_before >= difference_type(__n)) {
        iterator __start_n = _M_start + difference_type(__n);
        uninitialized_copy(_M_start, __start_n, __new_start);
        _M_start = __new_start;
	__stl_debug_do(_M_orphan_start());
        copy(__start_n, __pos, __old_start);
        fill(__pos - difference_type(__n), __pos, __x_copy);
      }
      else {
        __uninitialized_copy_fill(_M_start, __pos, __new_start, 
	                          _M_start, __x_copy);
        _M_start = __new_start;
	__stl_debug_do(_M_orphan_start());
        fill(__old_start, __pos, __x_copy);
      }
    }
    __STL_UNWIND(_M_destroy_nodes(__new_start._M_node, _M_start._M_node));
  }
  else {
    iterator __new_finish = _M_reserve_elements_at_back(__n);
    iterator __old_finish = _M_finish;
    const difference_type __elems_after = 
      difference_type(__length) - __elems_before;
    __pos = _M_finish - __elems_after;
    __STL_TRY {
      if (__elems_after > difference_type(__n)) {
        iterator __finish_n = _M_finish - difference_type(__n);
        uninitialized_copy(__finish_n, _M_finish, _M_finish);
        _M_finish = __new_finish;
	__stl_debug_do(_M_orphan_finish());
        copy_backward(__pos, __finish_n, __old_finish);
        fill(__pos, __pos + difference_type(__n), __x_copy);
      }
      else {
        __uninitialized_fill_copy(_M_finish, __pos + difference_type(__n),
                                  __x_copy, __pos, _M_finish);
        _M_finish = __new_finish;
	__stl_debug_do(_M_orphan_finish());	
        fill(__pos, __old_finish, __x_copy);
      }
    }
    __STL_UNWIND(_M_destroy_nodes(_M_finish._M_node + 1, __new_finish._M_node + 1));
  }
  __stl_debug_do(_Invalidate_all());        
}

#ifndef __STL_MEMBER_TEMPLATES 
template <class _Tp, class _Alloc, size_t __bufsiz>
void 
deque<_Tp,_Alloc,__bufsiz>::_M_insert_aux(iterator __pos,
                                           const value_type* __first,
                                           const value_type* __last,
                                           size_type __n)
{

  const difference_type __elemsbefore = __pos - _M_start;
  size_type __length = size();
  if (__elemsbefore < difference_type(__length / 2)) {
    iterator __new_start = _M_reserve_elements_at_front(__n);
    iterator __old_start = _M_start;
    __pos = _M_start + __elemsbefore;
    __STL_TRY {
      if (__elemsbefore >= difference_type(__n)) {
        iterator __start_n = _M_start + difference_type(__n);
        uninitialized_copy(_M_start, __start_n, __new_start);
        _M_start = __new_start;
	__stl_debug_do(_M_orphan_start());
        copy(__start_n, __pos, __old_start);
        copy(__first, __last, __pos - difference_type(__n));
      }
      else {
        const value_type* __mid = 
	  __first + (difference_type(__n) - __elemsbefore);
        __uninitialized_copy_copy(_M_start, __pos, __first, __mid,
                                  __new_start);
        _M_start = __new_start;
	__stl_debug_do(_M_orphan_start());
        copy(__mid, __last, __old_start);
      }
    }
    __STL_UNWIND(_M_destroy_nodes(__new_start._M_node, _M_start._M_node));
  }
  else {
    iterator __new_finish = _M_reserve_elements_at_back(__n);
    iterator __old_finish = _M_finish;
    const difference_type __elemsafter = 
      difference_type(__length) - __elemsbefore;
    __pos = _M_finish - __elemsafter;
    __STL_TRY {
      if (__elemsafter > difference_type(__n)) {
        iterator __finish_n = _M_finish - difference_type(__n);
        uninitialized_copy(__finish_n, _M_finish, _M_finish);
        _M_finish = __new_finish;
	__stl_debug_do(_M_orphan_finish());
        copy_backward(__pos, __finish_n, __old_finish);
        copy(__first, __last, __pos);
      }
      else {
        const value_type* __mid = __first + __elemsafter;
        __uninitialized_copy_copy(__mid, __last, __pos, _M_finish, _M_finish);
        _M_finish = __new_finish;
	__stl_debug_do(_M_orphan_finish());
        copy(__first, __mid, __pos);