stl_vector.h

gcc3.2.1源代码

	__throw_exception_again;
      }
  }

  template <class _InputIterator>
  void _M_range_initialize(_InputIterator __first,
                           _InputIterator __last, input_iterator_tag)
  {
    for ( ; __first != __last; ++__first)
      push_back(*__first);
  }

  // This function is only called by the constructor.
  template <class _ForwardIterator>
  void _M_range_initialize(_ForwardIterator __first,
                           _ForwardIterator __last, forward_iterator_tag)
  {
    size_type __n = distance(__first, __last);
    _M_start = _M_allocate(__n);
    _M_end_of_storage = _M_start + __n;
    _M_finish = uninitialized_copy(__first, __last, _M_start);
  }

  template <class _InputIterator>
  void _M_range_insert(iterator __pos,
                       _InputIterator __first, _InputIterator __last,
                       input_iterator_tag);

  template <class _ForwardIterator>
  void _M_range_insert(iterator __pos,
                       _ForwardIterator __first, _ForwardIterator __last,
                       forward_iterator_tag);
};

template <class _Tp, class _Alloc>
inline bool
operator==(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y)
{
  return __x.size() == __y.size() &&
         equal(__x.begin(), __x.end(), __y.begin());
}

template <class _Tp, class _Alloc>
inline bool
operator<(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y)
{
  return lexicographical_compare(__x.begin(), __x.end(),
                                 __y.begin(), __y.end());
}

template <class _Tp, class _Alloc>
inline void swap(vector<_Tp, _Alloc>& __x, vector<_Tp, _Alloc>& __y)
{
  __x.swap(__y);
}

template <class _Tp, class _Alloc>
inline bool
operator!=(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y) {
  return !(__x == __y);
}

template <class _Tp, class _Alloc>
inline bool
operator>(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y) {
  return __y < __x;
}

template <class _Tp, class _Alloc>
inline bool
operator<=(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y) {
  return !(__y < __x);
}

template <class _Tp, class _Alloc>
inline bool
operator>=(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y) {
  return !(__x < __y);
}

template <class _Tp, class _Alloc>
vector<_Tp,_Alloc>&
vector<_Tp,_Alloc>::operator=(const vector<_Tp, _Alloc>& __x)
{
  if (&__x != this) {
    const size_type __xlen = __x.size();
    if (__xlen > capacity()) {
      pointer __tmp = _M_allocate_and_copy(__xlen, __x.begin(), __x.end());
      _Destroy(_M_start, _M_finish);
      _M_deallocate(_M_start, _M_end_of_storage - _M_start);
      _M_start = __tmp;
      _M_end_of_storage = _M_start + __xlen;
    }
    else if (size() >= __xlen) {
      iterator __i(copy(__x.begin(), __x.end(), begin()));
      _Destroy(__i, end());
    }
    else {
      copy(__x.begin(), __x.begin() + size(), _M_start);
      uninitialized_copy(__x.begin() + size(), __x.end(), _M_finish);
    }
    _M_finish = _M_start + __xlen;
  }
  return *this;
}

template <class _Tp, class _Alloc>
void vector<_Tp, _Alloc>::_M_fill_assign(size_t __n, const value_type& __val)
{
  if (__n > capacity()) {
    vector<_Tp, _Alloc> __tmp(__n, __val, get_allocator());
    __tmp.swap(*this);
  }
  else if (__n > size()) {
    fill(begin(), end(), __val);
    _M_finish = uninitialized_fill_n(_M_finish, __n - size(), __val);
  }
  else
    erase(fill_n(begin(), __n, __val), end());
}

template <class _Tp, class _Alloc> template <class _InputIter>
void vector<_Tp, _Alloc>::_M_assign_aux(_InputIter __first, _InputIter __last,
                                        input_iterator_tag) {
  iterator __cur(begin());
  for ( ; __first != __last && __cur != end(); ++__cur, ++__first)
    *__cur = *__first;
  if (__first == __last)
    erase(__cur, end());
  else
    insert(end(), __first, __last);
}

template <class _Tp, class _Alloc> template <class _ForwardIter>
void
vector<_Tp, _Alloc>::_M_assign_aux(_ForwardIter __first, _ForwardIter __last,
                                   forward_iterator_tag) {
  size_type __len = distance(__first, __last);

  if (__len > capacity()) {
    pointer __tmp(_M_allocate_and_copy(__len, __first, __last));
    _Destroy(_M_start, _M_finish);
    _M_deallocate(_M_start, _M_end_of_storage - _M_start);
    _M_start = __tmp;
    _M_end_of_storage = _M_finish = _M_start + __len;
  }
  else if (size() >= __len) {
    iterator __new_finish(copy(__first, __last, _M_start));
    _Destroy(__new_finish, end());
    _M_finish = __new_finish.base();
  }
  else {
    _ForwardIter __mid = __first;
    advance(__mid, size());
    copy(__first, __mid, _M_start);
    _M_finish = uninitialized_copy(__mid, __last, _M_finish);
  }
}

template <class _Tp, class _Alloc>
void
vector<_Tp, _Alloc>::_M_insert_aux(iterator __position, const _Tp& __x)
{
  if (_M_finish != _M_end_of_storage) {
    _Construct(_M_finish, *(_M_finish - 1));
    ++_M_finish;
    _Tp __x_copy = __x;
    copy_backward(__position, iterator(_M_finish - 2), iterator(_M_finish- 1));
    *__position = __x_copy;
  }
  else {
    const size_type __old_size = size();
    const size_type __len = __old_size != 0 ? 2 * __old_size : 1;
    iterator __new_start(_M_allocate(__len));
    iterator __new_finish(__new_start);
    try {
      __new_finish = uninitialized_copy(iterator(_M_start), __position,
                                        __new_start);
      _Construct(__new_finish.base(), __x);
      ++__new_finish;
      __new_finish = uninitialized_copy(__position, iterator(_M_finish),
                                        __new_finish);
    }
    catch(...)
      {
	_Destroy(__new_start,__new_finish);
	_M_deallocate(__new_start.base(),__len);
	__throw_exception_again;
      }
    _Destroy(begin(), end());
    _M_deallocate(_M_start, _M_end_of_storage - _M_start);
    _M_start = __new_start.base();
    _M_finish = __new_finish.base();
    _M_end_of_storage = __new_start.base() + __len;
  }
}

template <class _Tp, class _Alloc>
void
vector<_Tp, _Alloc>::_M_insert_aux(iterator __position)
{
  if (_M_finish != _M_end_of_storage) {
    _Construct(_M_finish, *(_M_finish - 1));
    ++_M_finish;
    copy_backward(__position, iterator(_M_finish - 2),
		  iterator(_M_finish - 1));
    *__position = _Tp();
  }
  else {
    const size_type __old_size = size();
    const size_type __len = __old_size != 0 ? 2 * __old_size : 1;
    pointer __new_start = _M_allocate(__len);
    pointer __new_finish = __new_start;
    try {
      __new_finish = uninitialized_copy(iterator(_M_start), __position,
					__new_start);
      _Construct(__new_finish);
      ++__new_finish;
      __new_finish = uninitialized_copy(__position, iterator(_M_finish),
					__new_finish);
    }
    catch(...)
      {
	_Destroy(__new_start,__new_finish);
	_M_deallocate(__new_start,__len);
	__throw_exception_again;
      }
    _Destroy(begin(), end());
    _M_deallocate(_M_start, _M_end_of_storage - _M_start);
    _M_start = __new_start;
    _M_finish = __new_finish;
    _M_end_of_storage = __new_start + __len;
  }
}

template <class _Tp, class _Alloc>
void vector<_Tp, _Alloc>::_M_fill_insert(iterator __position, size_type __n,
                                         const _Tp& __x)
{
  if (__n != 0) {
    if (size_type(_M_end_of_storage - _M_finish) >= __n) {
      _Tp __x_copy = __x;
      const size_type __elems_after = end() - __position;
      iterator __old_finish(_M_finish);
      if (__elems_after > __n) {
        uninitialized_copy(_M_finish - __n, _M_finish, _M_finish);
        _M_finish += __n;
        copy_backward(__position, __old_finish - __n, __old_finish);
        fill(__position, __position + __n, __x_copy);
      }
      else {
        uninitialized_fill_n(_M_finish, __n - __elems_after, __x_copy);
        _M_finish += __n - __elems_after;
        uninitialized_copy(__position, __old_finish, _M_finish);
        _M_finish += __elems_after;
        fill(__position, __old_finish, __x_copy);
      }
    }
    else {
      const size_type __old_size = size();
      const size_type __len = __old_size + max(__old_size, __n);
      iterator __new_start(_M_allocate(__len));
      iterator __new_finish(__new_start);
      try {
        __new_finish = uninitialized_copy(begin(), __position, __new_start);
        __new_finish = uninitialized_fill_n(__new_finish, __n, __x);
        __new_finish
          = uninitialized_copy(__position, end(), __new_finish);
      }
      catch(...)
	{
	  _Destroy(__new_start,__new_finish);
	  _M_deallocate(__new_start.base(),__len);
	  __throw_exception_again;
	}
      _Destroy(_M_start, _M_finish);
      _M_deallocate(_M_start, _M_end_of_storage - _M_start);
      _M_start = __new_start.base();
      _M_finish = __new_finish.base();
      _M_end_of_storage = __new_start.base() + __len;
    }
  }
}

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

template <class _Tp, class _Alloc> template <class _ForwardIterator>
void
vector<_Tp, _Alloc>::_M_range_insert(iterator __position,
                                     _ForwardIterator __first,
                                     _ForwardIterator __last,
                                     forward_iterator_tag)
{
  if (__first != __last) {
    size_type __n = distance(__first, __last);
    if (size_type(_M_end_of_storage - _M_finish) >= __n) {
      const size_type __elems_after = end() - __position;
      iterator __old_finish(_M_finish);
      if (__elems_after > __n) {
        uninitialized_copy(_M_finish - __n, _M_finish, _M_finish);
        _M_finish += __n;
        copy_backward(__position, __old_finish - __n, __old_finish);
        copy(__first, __last, __position);
      }
      else {
        _ForwardIterator __mid = __first;
        advance(__mid, __elems_after);
        uninitialized_copy(__mid, __last, _M_finish);
        _M_finish += __n - __elems_after;
        uninitialized_copy(__position, __old_finish, _M_finish);
        _M_finish += __elems_after;
        copy(__first, __mid, __position);
      }
    }
    else {
      const size_type __old_size = size();
      const size_type __len = __old_size + max(__old_size, __n);
      iterator __new_start(_M_allocate(__len));
      iterator __new_finish(__new_start);
      try {
        __new_finish = uninitialized_copy(iterator(_M_start),
					  __position, __new_start);
        __new_finish = uninitialized_copy(__first, __last, __new_finish);
        __new_finish
          = uninitialized_copy(__position, iterator(_M_finish), __new_finish);
      }
      catch(...)
	{
	  _Destroy(__new_start,__new_finish);
	  _M_deallocate(__new_start.base(), __len);
	  __throw_exception_again;
	}
      _Destroy(_M_start, _M_finish);
      _M_deallocate(_M_start, _M_end_of_storage - _M_start);
      _M_start = __new_start.base();
      _M_finish = __new_finish.base();
      _M_end_of_storage = __new_start.base() + __len;
    }
  }
}

} // namespace std

#endif /* __GLIBCPP_INTERNAL_VECTOR_H */

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