stl_algobase.h

mingw32.rar

    inline _Tp*
    __copy_aux2(const _Tp* __first, const _Tp* __last, _Tp* __result,
		__true_type)
    { return std::__copy_trivial(__first, __last, __result); }

  template<typename _InputIterator, typename _OutputIterator>
    inline _OutputIterator
    __copy_ni2(_InputIterator __first, _InputIterator __last,
	       _OutputIterator __result, __true_type)
    {
      typedef typename iterator_traits<_InputIterator>::value_type
	_ValueType;
      typedef typename __type_traits<
	_ValueType>::has_trivial_assignment_operator _Trivial;
      return _OutputIterator(std::__copy_aux2(__first, __last, __result.base(),
					      _Trivial()));
    }

  template<typename _InputIterator, typename _OutputIterator>
    inline _OutputIterator
    __copy_ni2(_InputIterator __first, _InputIterator __last,
	       _OutputIterator __result, __false_type)
    {
      typedef typename iterator_traits<_InputIterator>::value_type _ValueType;
      typedef typename __type_traits<
	_ValueType>::has_trivial_assignment_operator _Trivial;
      return std::__copy_aux2(__first, __last, __result, _Trivial());
    }

  template<typename _InputIterator, typename _OutputIterator>
    inline _OutputIterator
    __copy_ni1(_InputIterator __first, _InputIterator __last,
	       _OutputIterator __result, __true_type)
    {
      typedef typename _Is_normal_iterator<_OutputIterator>::_Normal __Normal;
      return std::__copy_ni2(__first.base(), __last.base(),
			     __result, __Normal());
    }

  template<typename _InputIterator, typename _OutputIterator>
    inline _OutputIterator
    __copy_ni1(_InputIterator __first, _InputIterator __last,
	       _OutputIterator __result, __false_type)
    {
      typedef typename _Is_normal_iterator<_OutputIterator>::_Normal __Normal;
      return std::__copy_ni2(__first, __last, __result, __Normal());
    }

  /**
   *  @brief Copies the range [first,last) into result.
   *  @param  first  An input iterator.
   *  @param  last   An input iterator.
   *  @param  result An output iterator.
   *  @return   result + (first - last)
   *
   *  This inline function will boil down to a call to @c memmove whenever
   *  possible.  Failing that, if random access iterators are passed, then the
   *  loop count will be known (and therefore a candidate for compiler
   *  optimizations such as unrolling).  Result may not be contained within
   *  [first,last); the copy_backward function should be used instead.
   *
   *  Note that the end of the output range is permitted to be contained
   *  within [first,last).
  */
  template<typename _InputIterator, typename _OutputIterator>
    inline _OutputIterator
    copy(_InputIterator __first, _InputIterator __last,
	 _OutputIterator __result)
    {
      // concept requirements
      __glibcxx_function_requires(_InputIteratorConcept<_InputIterator>)
      __glibcxx_function_requires(_OutputIteratorConcept<_OutputIterator,
	    typename iterator_traits<_InputIterator>::value_type>)
      __glibcxx_requires_valid_range(__first, __last);

       typedef typename _Is_normal_iterator<_InputIterator>::_Normal __Normal;
       return std::__copy_ni1(__first, __last, __result, __Normal());
    }

  template<typename _BidirectionalIterator1, typename _BidirectionalIterator2>
    inline _BidirectionalIterator2
    __copy_backward(_BidirectionalIterator1 __first,
		    _BidirectionalIterator1 __last,
		    _BidirectionalIterator2 __result,
		    bidirectional_iterator_tag)
    {
      while (__first != __last)
        *--__result = *--__last;
      return __result;
    }

  template<typename _RandomAccessIterator, typename _BidirectionalIterator>
    inline _BidirectionalIterator
    __copy_backward(_RandomAccessIterator __first, _RandomAccessIterator __last,
		    _BidirectionalIterator __result, random_access_iterator_tag)
    {
      typename iterator_traits<_RandomAccessIterator>::difference_type __n;
      for (__n = __last - __first; __n > 0; --__n)
        *--__result = *--__last;
      return __result;
    }


  // This dispatch class is a workaround for compilers that do not
  // have partial ordering of function templates.  All we're doing is
  // creating a specialization so that we can turn a call to copy_backward
  // into a memmove whenever possible.
  template<typename _BidirectionalIterator1, typename _BidirectionalIterator2,
           typename _BoolType>
    struct __copy_backward_dispatch
    {
      static _BidirectionalIterator2
      copy(_BidirectionalIterator1 __first, _BidirectionalIterator1 __last,
	   _BidirectionalIterator2 __result)
      { return std::__copy_backward(__first, __last, __result,
				    std::__iterator_category(__first)); }
    };

  template<typename _Tp>
    struct __copy_backward_dispatch<_Tp*, _Tp*, __true_type>
    {
      static _Tp*
      copy(const _Tp* __first, const _Tp* __last, _Tp* __result)
      {
	const ptrdiff_t _Num = __last - __first;
	std::memmove(__result - _Num, __first, sizeof(_Tp) * _Num);
	return __result - _Num;
      }
    };

  template<typename _Tp>
    struct __copy_backward_dispatch<const _Tp*, _Tp*, __true_type>
    {
      static _Tp*
      copy(const _Tp* __first, const _Tp* __last, _Tp* __result)
      {
	return  std::__copy_backward_dispatch<_Tp*, _Tp*, __true_type>
	  ::copy(__first, __last, __result);
      }
    };

  template<typename _BI1, typename _BI2>
    inline _BI2
    __copy_backward_aux(_BI1 __first, _BI1 __last, _BI2 __result)
    {
      typedef typename __type_traits<typename iterator_traits<_BI2>::value_type>
			    ::has_trivial_assignment_operator _Trivial;
      return
	std::__copy_backward_dispatch<_BI1, _BI2, _Trivial>::copy(__first,
								  __last,
								  __result);
    }

  template <typename _BI1, typename _BI2>
    inline _BI2
    __copy_backward_output_normal_iterator(_BI1 __first, _BI1 __last,
					   _BI2 __result, __true_type)
    { return _BI2(std::__copy_backward_aux(__first, __last, __result.base())); }

  template <typename _BI1, typename _BI2>
    inline _BI2
    __copy_backward_output_normal_iterator(_BI1 __first, _BI1 __last,
					   _BI2 __result, __false_type)
    { return std::__copy_backward_aux(__first, __last, __result); }

  template <typename _BI1, typename _BI2>
    inline _BI2
    __copy_backward_input_normal_iterator(_BI1 __first, _BI1 __last,
					  _BI2 __result, __true_type)
    {
      typedef typename _Is_normal_iterator<_BI2>::_Normal __Normal;
      return std::__copy_backward_output_normal_iterator(__first.base(),
							 __last.base(),
							 __result, __Normal());
    }

  template <typename _BI1, typename _BI2>
    inline _BI2
    __copy_backward_input_normal_iterator(_BI1 __first, _BI1 __last,
					  _BI2 __result, __false_type)
    {
      typedef typename _Is_normal_iterator<_BI2>::_Normal __Normal;
      return std::__copy_backward_output_normal_iterator(__first, __last,
							 __result, __Normal());
    }

  /**
   *  @brief Copies the range [first,last) into result.
   *  @param  first  A bidirectional iterator.
   *  @param  last   A bidirectional iterator.
   *  @param  result A bidirectional iterator.
   *  @return   result - (first - last)
   *
   *  The function has the same effect as copy, but starts at the end of the
   *  range and works its way to the start, returning the start of the result.
   *  This inline function will boil down to a call to @c memmove whenever
   *  possible.  Failing that, if random access iterators are passed, then the
   *  loop count will be known (and therefore a candidate for compiler
   *  optimizations such as unrolling).
   *
   *  Result may not be in the range [first,last).  Use copy instead.  Note
   *  that the start of the output range may overlap [first,last).
  */
  template <typename _BI1, typename _BI2>
    inline _BI2
    copy_backward(_BI1 __first, _BI1 __last, _BI2 __result)
    {
      // concept requirements
      __glibcxx_function_requires(_BidirectionalIteratorConcept<_BI1>)
      __glibcxx_function_requires(_Mutable_BidirectionalIteratorConcept<_BI2>)
      __glibcxx_function_requires(_ConvertibleConcept<
	    typename iterator_traits<_BI1>::value_type,
	    typename iterator_traits<_BI2>::value_type>)
      __glibcxx_requires_valid_range(__first, __last);

      typedef typename _Is_normal_iterator<_BI1>::_Normal __Normal;
      return std::__copy_backward_input_normal_iterator(__first, __last,
							__result, __Normal());
    }


  /**
   *  @brief Fills the range [first,last) with copies of value.
   *  @param  first  A forward iterator.
   *  @param  last   A forward iterator.
   *  @param  value  A reference-to-const of arbitrary type.
   *  @return   Nothing.
   *
   *  This function fills a range with copies of the same value.  For one-byte
   *  types filling contiguous areas of memory, this becomes an inline call to
   *  @c memset.
  */
  template<typename _ForwardIterator, typename _Tp>
    void
    fill(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value)
    {
      // concept requirements
      __glibcxx_function_requires(_Mutable_ForwardIteratorConcept<
				  _ForwardIterator>)
      __glibcxx_requires_valid_range(__first, __last);

      for ( ; __first != __last; ++__first)
	*__first = __value;
    }

  /**
   *  @brief Fills the range [first,first+n) with copies of value.
   *  @param  first  An output iterator.
   *  @param  n      The count of copies to perform.
   *  @param  value  A reference-to-const of arbitrary type.
   *  @return   The iterator at first+n.
   *
   *  This function fills a range with copies of the same value.  For one-byte
   *  types filling contiguous areas of memory, this becomes an inline call to
   *  @c memset.
  */
  template<typename _OutputIterator, typename _Size, typename _Tp>
    _OutputIterator
    fill_n(_OutputIterator __first, _Size __n, const _Tp& __value)
    {
      // concept requirements
      __glibcxx_function_requires(_OutputIteratorConcept<_OutputIterator,_Tp>)

      for ( ; __n > 0; --__n, ++__first)
	*__first = __value;
      return __first;
    }

  // Specialization: for one-byte types we can use memset.
  inline void
  fill(unsigned char* __first, unsigned char* __last, const unsigned char& __c)
  {
    __glibcxx_requires_valid_range(__first, __last);
    const unsigned char __tmp = __c;
    std::memset(__first, __tmp, __last - __first);
  }

  inline void
  fill(signed char* __first, signed char* __last, const signed char& __c)
  {
    __glibcxx_requires_valid_range(__first, __last);