stl_bvector.h

TSP问题的一个类库 有源代码和stl

    _M_start = iterator();
    _M_finish = iterator();
    _M_end_of_storage = 0;
    for ( ; __first != __last; ++__first) 
      push_back(*__first);
  }

  template <class _ForwardIterator>
  void _M_initialize_range(_ForwardIterator __first, _ForwardIterator __last,
                           forward_iterator_tag) {
    size_type __n = 0;
    distance(__first, __last, __n);
    _M_initialize(__n);
    copy(__first, __last, _M_start);
  }

  template <class _InputIterator>
  void _M_insert_range(iterator __pos,
                       _InputIterator __first, _InputIterator __last,
                       input_iterator_tag) {
    for ( ; __first != __last; ++__first) {
      __pos = insert(__pos, *__first);
      ++__pos;
    }
  }

  template <class _ForwardIterator>
  void _M_insert_range(iterator __position,
                       _ForwardIterator __first, _ForwardIterator __last,
                       forward_iterator_tag) {
    if (__first != __last) {
      size_type __n = 0;
      distance(__first, __last, __n);
      if (capacity() - size() >= __n) {
        copy_backward(__position, end(), _M_finish + difference_type(__n));
        copy(__first, __last, __position);
        _M_finish += difference_type(__n);
      }
      else {
        size_type __len = size() + max(size(), __n);
        unsigned int* __q = _M_bit_alloc(__len);
        iterator __i = copy(begin(), __position, iterator(__q, 0));
        __i = copy(__first, __last, __i);
        _M_finish = copy(__position, end(), __i);
        _M_deallocate();
        _M_end_of_storage = __q + (__len + __WORD_BIT - 1)/__WORD_BIT;
        _M_start = iterator(__q, 0);
      }
    }
  }      

#endif /* __STL_MEMBER_TEMPLATES */

public:
  iterator begin() { return _M_start; }
  const_iterator begin() const { return _M_start; }
  iterator end() { return _M_finish; }
  const_iterator end() const { return _M_finish; }

  reverse_iterator rbegin() { return reverse_iterator(end()); }
  const_reverse_iterator rbegin() const { 
    return const_reverse_iterator(end()); 
  }
  reverse_iterator rend() { return reverse_iterator(begin()); }
  const_reverse_iterator rend() const { 
    return const_reverse_iterator(begin()); 
  }

  size_type size() const { return size_type(end() - begin()); }
  size_type max_size() const { return size_type(-1); }
  size_type capacity() const {
    return size_type(const_iterator(_M_end_of_storage, 0) - begin());
  }
  bool empty() const { return begin() == end(); }

  reference operator[](size_type __n)
    { return *(begin() + difference_type(__n)); }
  const_reference operator[](size_type __n) const
    { return *(begin() + difference_type(__n)); }

#ifdef __STL_THROW_RANGE_ERRORS
  void _M_range_check(size_type __n) const {
    if (__n >= this->size())
      __stl_throw_range_error("vector<bool>");
  }

  reference at(size_type __n)
    { _M_range_check(__n); return (*this)[__n]; }
  const_reference at(size_type __n) const
    { _M_range_check(__n); return (*this)[__n]; }
#endif /* __STL_THROW_RANGE_ERRORS */

  explicit __BVECTOR(const allocator_type& __a = allocator_type())
    : _Base(__a) {}

  __BVECTOR(size_type __n, bool __value,
            const allocator_type& __a = allocator_type())
    : _Base(__a)
  {
    _M_initialize(__n);
    fill(_M_start._M_p, _M_end_of_storage, __value ? ~0 : 0);
  }

  explicit __BVECTOR(size_type __n)
    : _Base(allocator_type())
  {
    _M_initialize(__n);
    fill(_M_start._M_p, _M_end_of_storage, 0);
  }

  __BVECTOR(const __BVECTOR& __x) : _Base(__x.get_allocator()) {
    _M_initialize(__x.size());
    copy(__x.begin(), __x.end(), _M_start);
  }

#ifdef __STL_MEMBER_TEMPLATES
  // Check whether it's an integral type.  If so, it's not an iterator.
  template <class _InputIterator>
  __BVECTOR(_InputIterator __first, _InputIterator __last,
            const allocator_type& __a = allocator_type())
    : _Base(__a)
  {
    typedef typename _Is_integer<_InputIterator>::_Integral _Integral;
    _M_initialize_dispatch(__first, __last, _Integral());
  }
    
  template <class _Integer>
  void _M_initialize_dispatch(_Integer __n, _Integer __x, __true_type) {
    _M_initialize(__n);
    fill(_M_start._M_p, _M_end_of_storage, __x ? ~0 : 0);
  }
    
  template <class _InputIterator>
  void _M_initialize_dispatch(_InputIterator __first, _InputIterator __last,
                              __false_type) {
    _M_initialize_range(__first, __last, __ITERATOR_CATEGORY(__first));
  }
#else /* __STL_MEMBER_TEMPLATES */
  __BVECTOR(const_iterator __first, const_iterator __last,
            const allocator_type& __a = allocator_type())
    : _Base(__a)
  {
    size_type __n = 0;
    distance(__first, __last, __n);
    _M_initialize(__n);
    copy(__first, __last, _M_start);
  }
  __BVECTOR(const bool* __first, const bool* __last,
            const allocator_type& __a = allocator_type())
    : _Base(__a)
  {
    size_type __n = 0;
    distance(__first, __last, __n);
    _M_initialize(__n);
    copy(__first, __last, _M_start);
  }
#endif /* __STL_MEMBER_TEMPLATES */

  ~__BVECTOR() { }

  __BVECTOR& operator=(const __BVECTOR& __x) {
    if (&__x == this) return *this;
    if (__x.size() > capacity()) {
      _M_deallocate();
      _M_initialize(__x.size());
    }
    copy(__x.begin(), __x.end(), begin());
    _M_finish = begin() + difference_type(__x.size());
    return *this;
  }

  // assign(), a generalized assignment member function.  Two
  // versions: one that takes a count, and one that takes a range.
  // The range version is a member template, so we dispatch on whether
  // or not the type is an integer.

  void _M_fill_assign(size_t __n, bool __x) {
    if (__n > size()) {
      fill(_M_start._M_p, _M_end_of_storage, __x ? ~0 : 0);
      insert(end(), __n - size(), __x);
    }
    else {
      erase(begin() + __n, end());
      fill(_M_start._M_p, _M_end_of_storage, __x ? ~0 : 0);
    }
  }

  void assign(size_t __n, bool __x) { _M_fill_assign(__n, __x); }

#ifdef __STL_MEMBER_TEMPLATES

  template <class _InputIterator>
  void assign(_InputIterator __first, _InputIterator __last) {
    typedef typename _Is_integer<_InputIterator>::_Integral _Integral;
    _M_assign_dispatch(__first, __last, _Integral());
  }

  template <class _Integer>
  void _M_assign_dispatch(_Integer __n, _Integer __val, __true_type)
    { _M_fill_assign((size_t) __n, (bool) __val); }

  template <class _InputIter>
  void _M_assign_dispatch(_InputIter __first, _InputIter __last, __false_type)
    { _M_assign_aux(__first, __last, __ITERATOR_CATEGORY(__first)); }

  template <class _InputIterator>
  void _M_assign_aux(_InputIterator __first, _InputIterator __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 _ForwardIterator>
  void _M_assign_aux(_ForwardIterator __first, _ForwardIterator __last,
                     forward_iterator_tag) {
    size_type __len = 0;
    distance(__first, __last, __len);
    if (__len < size())
      erase(copy(__first, __last, begin()), end());
    else {
      _ForwardIterator __mid = __first;
      advance(__mid, size());
      copy(__first, __mid, begin());
      insert(end(), __mid, __last);
    }
  }    

#endif /* __STL_MEMBER_TEMPLATES */

  void reserve(size_type __n) {
    if (capacity() < __n) {
      unsigned int* __q = _M_bit_alloc(__n);
      _M_finish = copy(begin(), end(), iterator(__q, 0));
      _M_deallocate();
      _M_start = iterator(__q, 0);
      _M_end_of_storage = __q + (__n + __WORD_BIT - 1)/__WORD_BIT;
    }
  }

  reference front() { return *begin(); }
  const_reference front() const { return *begin(); }
  reference back() { return *(end() - 1); }
  const_reference back() const { return *(end() - 1); }
  void push_back(bool __x) {
    if (_M_finish._M_p != _M_end_of_storage)
      *_M_finish++ = __x;
    else
      _M_insert_aux(end(), __x);
  }
  void swap(__BVECTOR& __x) {
    __STD::swap(_M_start, __x._M_start);
    __STD::swap(_M_finish, __x._M_finish);
    __STD::swap(_M_end_of_storage, __x._M_end_of_storage);
  }
  iterator insert(iterator __position, bool __x = bool()) {
    difference_type __n = __position - begin();
    if (_M_finish._M_p != _M_end_of_storage && __position == end())
      *_M_finish++ = __x;
    else
      _M_insert_aux(__position, __x);
    return begin() + __n;
  }

#ifdef __STL_MEMBER_TEMPLATES
  // Check whether it's an integral type.  If so, it's not an iterator.
  template <class _InputIterator>
  void insert(iterator __position,
              _InputIterator __first, _InputIterator __last) {
    typedef typename _Is_integer<_InputIterator>::_Integral _Integral;
    _M_insert_dispatch(__position, __first, __last, _Integral());
  }

  template <class _Integer>
  void _M_insert_dispatch(iterator __pos, _Integer __n, _Integer __x,
                          __true_type) {
    _M_fill_insert(__pos, __n, __x);
  }

  template <class _InputIterator>
  void _M_insert_dispatch(iterator __pos,
                          _InputIterator __first, _InputIterator __last,
                          __false_type) {
    _M_insert_range(__pos, __first, __last, __ITERATOR_CATEGORY(__first));
  }
#else /* __STL_MEMBER_TEMPLATES */
  void insert(iterator __position,
              const_iterator __first, const_iterator __last) {
    if (__first == __last) return;
    size_type __n = 0;
    distance(__first, __last, __n);
    if (capacity() - size() >= __n) {
      copy_backward(__position, end(), _M_finish + __n);
      copy(__first, __last, __position);
      _M_finish += __n;
    }
    else {
      size_type __len = size() + max(size(), __n);
      unsigned int* __q = _M_bit_alloc(__len);
      iterator __i = copy(begin(), __position, iterator(__q, 0));
      __i = copy(__first, __last, __i);
      _M_finish = copy(__position, end(), __i);
      _M_deallocate();
      _M_end_of_storage = __q + (__len + __WORD_BIT - 1)/__WORD_BIT;
      _M_start = iterator(__q, 0);
    }
  }

  void insert(iterator __position, const bool* __first, const bool* __last) {
    if (__first == __last) return;
    size_type __n = 0;
    distance(__first, __last, __n);
    if (capacity() - size() >= __n) {
      copy_backward(__position, end(), _M_finish + __n);
      copy(__first, __last, __position);
      _M_finish += __n;
    }
    else {
      size_type __len = size() + max(size(), __n);
      unsigned int* __q = _M_bit_alloc(__len);
      iterator __i = copy(begin(), __position, iterator(__q, 0));
      __i = copy(__first, __last, __i);
      _M_finish = copy(__position, end(), __i);
      _M_deallocate();
      _M_end_of_storage = __q + (__len + __WORD_BIT - 1)/__WORD_BIT;
      _M_start = iterator(__q, 0);
    }
  }
#endif /* __STL_MEMBER_TEMPLATES */

  void _M_fill_insert(iterator __position, size_type __n, bool __x) {
    if (__n == 0) return;
    if (capacity() - size() >= __n) {
      copy_backward(__position, end(), _M_finish + difference_type(__n));
      fill(__position, __position + difference_type(__n), __x);
      _M_finish += difference_type(__n);
    }
    else {
      size_type __len = size() + max(size(), __n);
      unsigned int* __q = _M_bit_alloc(__len);
      iterator __i = copy(begin(), __position, iterator(__q, 0));
      fill_n(__i, __n, __x);
      _M_finish = copy(__position, end(), __i + difference_type(__n));
      _M_deallocate();
      _M_end_of_storage = __q + (__len + __WORD_BIT - 1)/__WORD_BIT;
      _M_start = iterator(__q, 0);
    }
  }

  void insert(iterator __position, size_type __n, bool __x) {
    _M_fill_insert(__position, __n, __x);
  }

  void pop_back() { --_M_finish; }
  iterator erase(iterator __position) {
    if (__position + 1 != end())
      copy(__position + 1, end(), __position);
      --_M_finish;
    return __position;
  }
  iterator erase(iterator __first, iterator __last) {
    _M_finish = copy(__last, end(), __first);
    return __first;
  }
  void resize(size_type __new_size, bool __x = bool()) {
    if (__new_size < size()) 
      erase(begin() + difference_type(__new_size), end());
    else
      insert(end(), __new_size - size(), __x);
  }
  void flip() {
    for (unsigned int* __p = _M_start._M_p; __p != _M_end_of_storage; ++__p)
      *__p = ~*__p;
  }

  void clear() { erase(begin(), end()); }
};

#ifdef __SGI_STL_VECBOOL_TEMPLATE

// This typedef is non-standard.  It is provided for backward compatibility.
typedef vector<bool, alloc> bit_vector;

#else /* __SGI_STL_VECBOOL_TEMPLATE */

inline void swap(bit_vector& __x, bit_vector& __y) {
  __x.swap(__y);
}

inline bool 
operator==(const bit_vector& __x, const bit_vector& __y)
{
  return (__x.size() == __y.size() && 
          equal(__x.begin(), __x.end(), __y.begin()));
}

inline bool 
operator!=(const bit_vector& __x, const bit_vector& __y)
{
  return !(__x == __y);
}

inline bool 
operator<(const bit_vector& __x, const bit_vector& __y)
{
  return lexicographical_compare(__x.begin(), __x.end(), 
                                 __y.begin(), __y.end());
}

inline bool operator>(const bit_vector& __x, const bit_vector& __y)
{
  return __y < __x;
}

inline bool operator<=(const bit_vector& __x, const bit_vector& __y)
{
  return !(__y < __x);
}

inline bool operator>=(const bit_vector& __x, const bit_vector& __y)
{
  return !(__x < __y);
}

#endif /* __SGI_STL_VECBOOL_TEMPLATE */

#undef __SGI_STL_VECBOOL_TEMPLATE
#undef __BVECTOR

#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
#pragma reset woff 1174
#pragma reset woff 1375
#endif

__STL_END_NAMESPACE 

#endif /* __SGI_STL_INTERNAL_BVECTOR_H */

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// mode:C++
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