_string.h

MONA是为数不多的C++语言编写的一个很小的操作系统

	  }
	}

  template <class _ForwardIter> 
  void insert(iterator __position, _ForwardIter __first, _ForwardIter __last, 
	      const forward_iterator_tag &)  {
    if (__first != __last) {
      difference_type __n = distance(__first, __last);
      if (this->_M_end_of_storage._M_data - this->_M_finish >= __n + 1) {
	const difference_type __elems_after = this->_M_finish - __position;
	pointer __old_finish = this->_M_finish;
	if (__elems_after >= __n) {
	  uninitialized_copy((this->_M_finish - __n) + 1, this->_M_finish + 1,
			     this->_M_finish + 1);
	  this->_M_finish += __n;
	  _Traits::move(__position + __n,
			__position, (__elems_after - __n) + 1);
	  _M_move(__first, __last, __position);
	      }
	else {
	  _ForwardIter __mid = __first;
	  advance(__mid, __elems_after + 1);
	  uninitialized_copy(__mid, __last, this->_M_finish + 1);
	  this->_M_finish += __n - __elems_after;
	        _STLP_TRY {
	          uninitialized_copy(__position, __old_finish + 1, this->_M_finish);
	          this->_M_finish += __elems_after;
	        }
	        _STLP_UNWIND((_STLP_STD::_Destroy(__old_finish + 1, this->_M_finish), 
	                      this->_M_finish = __old_finish));
	        _M_move(__first, __mid, __position);
	}
      }
      else {
	const size_type __old_size = size();        
	const size_type __len
	  = __old_size + (max)(__old_size, __STATIC_CAST(size_type,__n)) + 1;
	      pointer __new_start = this->_M_end_of_storage.allocate(__len);
	      pointer __new_finish = __new_start;
	      _STLP_TRY {
	        __new_finish = uninitialized_copy(this->_M_start, __position, __new_start);
	        __new_finish = uninitialized_copy(__first, __last, __new_finish);
	        __new_finish
	          = uninitialized_copy(__position, this->_M_finish, __new_finish);
	        _M_construct_null(__new_finish);
	      }
	      _STLP_UNWIND((_STLP_STD::_Destroy(__new_start,__new_finish),
	                    this->_M_end_of_storage.deallocate(__new_start,__len)));
	      _STLP_STD::_Destroy(this->_M_start, this->_M_finish + 1);
	      this->_M_deallocate_block();
	      this->_M_start = __new_start;
	      this->_M_finish = __new_finish;
	      this->_M_end_of_storage._M_data = __new_start + __len; 
	    }
    }
  }

  template <class _Integer> void _M_insert_dispatch(iterator __p, _Integer __n, _Integer __x,
                          const __true_type&) {
    insert(__p, (size_type) __n, (_CharT) __x);
  }

  template <class _InputIter> void _M_insert_dispatch(iterator __p, _InputIter __first, _InputIter __last,
                          const __false_type&) {
    insert(__p, __first, __last, _STLP_ITERATOR_CATEGORY(__first, _InputIter));
  }

  template <class _InputIterator> void 
  _M_copy(_InputIterator __first, _InputIterator __last, pointer __result) {
    for ( ; __first != __last; ++__first, ++__result)
      _Traits::assign(*__result, *__first);
  }

  template <class _InputIterator>
  void _M_move(_InputIterator __first, _InputIterator __last, pointer __result) {
    //call _M_copy as being here means that __result is not within [__first, __last)
    for ( ; __first != __last; ++__first, ++__result)
      _Traits::assign(*__result, *__first);
  }

#endif /* _STLP_MEMBER_TEMPLATES */

  pointer _M_insert_aux(pointer, _CharT);

  void 
  _M_copy(const _CharT* __first, const _CharT* __last, _CharT* __result) {
    _Traits::copy(__result, __first, __last - __first);
  }
  void _M_move(const _CharT* __first, const _CharT* __last, _CharT* __result) {
    _Traits::move(__result, __first, __last - __first);
  }

public:                         // Erase.

  _Self& erase(size_type __pos = 0, size_type __n = npos) {
    if (__pos > size())
      this->_M_throw_out_of_range();
    erase(begin() + __pos, begin() + __pos + (min) (__n, size() - __pos));
    return *this;
  }  

  iterator erase(iterator __position) {
                                // The move includes the terminating _CharT().
    _Traits::move(__position, __position + 1, this->_M_finish - __position);
    _STLP_STD::_Destroy(this->_M_finish);
    --this->_M_finish;
    return __position;
  }

  iterator erase(iterator __first, iterator __last) {
    if (__first != __last) {
                                // The move includes the terminating _CharT().
      traits_type::move(__first, __last, (this->_M_finish - __last) + 1);
      pointer __new_finish = this->_M_finish - (__last - __first);
      _STLP_STD::_Destroy(__new_finish + 1, this->_M_finish + 1);
      this->_M_finish = __new_finish;
    }
    return __first;
  }

public:                         // Replace.  (Conceptually equivalent
                                // to erase followed by insert.)
  _Self& replace(size_type __pos, size_type __n, 
                        const _Self& __s) {
    if (__pos > size())
      this->_M_throw_out_of_range();
    const size_type __len = (min) (__n, size() - __pos);
    if (size() - __len >= max_size() - __s.size())
      this->_M_throw_length_error();
    return replace(begin() + __pos, begin() + __pos + __len, 
                   __s._M_start, __s._M_finish);
  }

  _Self& replace(size_type __pos1, size_type __n1,
                        const _Self& __s,
                        size_type __pos2, size_type __n2) {
    if (__pos1 > size() || __pos2 > __s.size())
      this->_M_throw_out_of_range();
    const size_type __len1 = (min) (__n1, size() - __pos1);
    const size_type __len2 = (min) (__n2, __s.size() - __pos2);
    if (size() - __len1 >= max_size() - __len2)
      this->_M_throw_length_error();
    return replace(begin() + __pos1, begin() + __pos1 + __len1,
                   __s._M_start + __pos2, __s._M_start + __pos2 + __len2);
  }

  _Self& replace(size_type __pos, size_type __n1,
                        const _CharT* __s, size_type __n2) {
    _STLP_FIX_LITERAL_BUG(__s)
    if (__pos > size())
      this->_M_throw_out_of_range();
    const size_type __len = (min) (__n1, size() - __pos);
    if (__n2 > max_size() || size() - __len >= max_size() - __n2)
      this->_M_throw_length_error();
    return replace(begin() + __pos, begin() + __pos + __len,
                   __s, __s + __n2);
  }

  _Self& replace(size_type __pos, size_type __n1,
                        const _CharT* __s) {
    _STLP_FIX_LITERAL_BUG(__s)
    if (__pos > size())
      this->_M_throw_out_of_range();
    const size_type __len = (min) (__n1, size() - __pos);
    const size_type __n2 = _Traits::length(__s);
    if (__n2 > max_size() || size() - __len >= max_size() - __n2)
      this->_M_throw_length_error();
    return replace(begin() + __pos, begin() + __pos + __len,
                   __s, __s + _Traits::length(__s));
  }

  _Self& replace(size_type __pos, size_type __n1,
                        size_type __n2, _CharT __c) {
    if (__pos > size())
      this->_M_throw_out_of_range();
    const size_type __len = (min) (__n1, size() - __pos);
    if (__n2 > max_size() || size() - __len >= max_size() - __n2)
      this->_M_throw_length_error();
    return replace(begin() + __pos, begin() + __pos + __len, __n2, __c);
  }

  _Self& replace(iterator __first, iterator __last, 
                        const _Self& __s) 
    { return replace(__first, __last, __s._M_start, __s._M_finish); }

  _Self& replace(iterator __first, iterator __last,
                        const _CharT* __s, size_type __n) 
    { _STLP_FIX_LITERAL_BUG(__s) return replace(__first, __last, __s, __s + __n); }

  _Self& replace(iterator __first, iterator __last,
                        const _CharT* __s) {
    _STLP_FIX_LITERAL_BUG(__s)
    return replace(__first, __last, __s, __s + _Traits::length(__s));
  }

  _Self& replace(iterator __first, iterator __last, 
                        size_type __n, _CharT __c);

  // Check to see if _InputIterator is an integer type.  If so, then
  // it can't be an iterator.
#ifdef _STLP_MEMBER_TEMPLATES
  template <class _InputIter> _Self& replace(iterator __first, iterator __last,
                        _InputIter __f, _InputIter __l) {
    typedef typename _Is_integer<_InputIter>::_Integral _Integral;
    return _M_replace_dispatch(__first, __last, __f, __l,  _Integral());
  }
#else /* _STLP_MEMBER_TEMPLATES */
  _Self& replace(iterator __first, iterator __last,
		 const _CharT* __f, const _CharT* __l);
#endif /* _STLP_MEMBER_TEMPLATES */

private:                        // Helper functions for replace.

#ifdef _STLP_MEMBER_TEMPLATES

  template <class _Integer> _Self& _M_replace_dispatch(iterator __first, iterator __last,
                                    _Integer __n, _Integer __x,
                                    const __true_type&) {
    return replace(__first, __last, (size_type) __n, (_CharT) __x);
  }

  template <class _InputIter> _Self& _M_replace_dispatch(iterator __first, iterator __last,
                                    _InputIter __f, _InputIter __l,
                                    const __false_type&) {
    return replace(__first, __last, __f, __l, _STLP_ITERATOR_CATEGORY(__f, _InputIter));
  }

  template <class _InputIter> _Self& replace(iterator __first, iterator __last,
                        _InputIter __f, _InputIter __l, const input_iterator_tag &)  {
	  for ( ; __first != __last && __f != __l; ++__first, ++__f)
	    _Traits::assign(*__first, *__f);

	  if (__f == __l)
	    erase(__first, __last);
	  else
	    insert(__last, __f, __l);
	  return *this;
	}

  template <class _InputIter>
  _Self& replace(iterator __first, iterator __last,
                 _InputIter __f, _InputIter __l, const random_access_iterator_tag &) {
    //might be overlapping
    if (_M_inside(__f)) {
      difference_type __n = __l - __f;
      const difference_type __len = __last - __first;
      if (__len >= __n) {
        _M_move(__f, __l, __first);
        erase(__first + __n, __last);
      }
      else {
        _InputIter __m = __f + __len;
        if ((__l <= __first) || (__f >= __last)) {
				  //no overlap:
          _M_copy(__f, __m, __first);
          insert(__last, __m, __l);
        }
        else {
				  //we have to take care of reallocation:
				  const difference_type __off_dest = __first - this->begin();
				  const difference_type __off_src = __f - this->begin();
				  insert(__last, __m, __l);
				  _Traits::move(begin() + __off_dest, begin() + __off_src, __n);
        }
      }
      return *this;
    }
	  else {
		  return replace(__first, __last, __f, __l, forward_iterator_tag());
	  }
  }


  template <class _ForwardIter> _Self& replace(iterator __first, iterator __last,
                        _ForwardIter __f, _ForwardIter __l, 
                        const forward_iterator_tag &)  {
	  difference_type __n = distance(__f, __l);
	  const difference_type __len = __last - __first;
	  if (__len >= __n) {
	    _M_copy(__f, __l, __first);
	    erase(__first + __n, __last);
	  }
	  else {
	    _ForwardIter __m = __f;
	    advance(__m, __len);
	    _M_copy(__f, __m, __first);
	    insert(__last, __m, __l);
	  }
	  return *this;
	}

#endif /* _STLP_MEMBER_TEMPLATES */

public:                         // Other modifier member functions.

  size_type copy(_CharT* __s, size_type __n, size_type __pos = 0) const {
    _STLP_FIX_LITERAL_BUG(__s)
    if (__pos > size())
      this->_M_throw_out_of_range();
    const size_type __len = (min) (__n, size() - __pos);
    _Traits::copy(__s, this->_M_start + __pos, __len);
    return __len;
  }

  void swap(_Self& __s) {
    _STLP_STD::swap(this->_M_start, __s._M_start);
    _STLP_STD::swap(this->_M_finish, __s._M_finish);
    _STLP_STD::swap(this->_M_end_of_storage, __s._M_end_of_storage);
  }

public:                         // Conversion to C string.

  const _CharT* c_str() const { return this->_M_start; }
  const _CharT* data()  const { return this->_M_start; }

public:                         // find.

  size_type find(const _Self& __s, size_type __pos = 0) const 
    { return find(__s._M_start, __pos, __s.size()); }

  size_type find(const _CharT* __s, size_type __pos = 0) const 
    { _STLP_FIX_LITERAL_BUG(__s) return find(__s, __pos, _Traits::length(__s)); }

  size_type find(const _CharT* __s, size_type __pos, size_type __n) const;

  // WIE: Versant schema compiler 5.2.2 ICE workaround
  size_type find(_CharT __c) const
    { return find(__c, 0) ; }
  size_type find(_CharT __c, size_type __pos /* = 0 */) const;

public:                         // rfind.

  size_type rfind(const _Self& __s, size_type __pos = npos) const 
    { return rfind(__s._M_start, __pos, __s.size()); }

  size_type rfind(const _CharT* __s, size_type __pos = npos) const 
    { _STLP_FIX_LITERAL_BUG(__s) return rfind(__s, __pos, _Traits::length(__s)); }

  size_type rfind(const _CharT* __s, size_type __pos, size_type __n) const;
  size_type rfind(_CharT __c, size_type __pos = npos) const;

public:                         // find_first_of
  
  size_type find_first_of(const _Self& __s, size_type __pos = 0) const 
    { return find_first_of(__s._M_start, __pos, __s.size()); }

  size_type find_first_of(const _CharT* __s, size_type __pos = 0) const 
    { _STLP_FIX_LITERAL_BUG(__s) return find_first_of(__s, __pos, _Traits::length(__s)); }

  size_type find_first_of(const _CharT* __s, size_type __pos, 
                          size_type __n) const;

  size_type find_first_of(_CharT __c, size_type __pos = 0) const 
    { return find(__c, __pos); }

public:                         // find_last_of

  size_type find_last_of(const _Self& __s,
                         size_type __pos = npos) const
    { return find_last_of(__s._M_start, __pos, __s.size()); }

  size_type find_last_of(const _CharT* __s, size_type __pos = npos) const 
    { _STLP_FIX_LITERAL_BUG(__s) return find_last_of(__s, __pos, _Traits::length(__s)); }

  size_type find_last_of(const _CharT* __s, size_type __pos, 
                         size_type __n) const;

  size_type find_last_of(_CharT __c, size_type __pos = npos) const {
    return rfind(__c, __pos);
  }

public:                         // find_first_not_of

  size_type find_first_not_of(const _Self& __s, 
                              size_type __pos = 0) const 
    { return find_first_not_of(__s._M_start, __pos, __s.size()); }