1 // vector<bool> specialization -*- C++ -*-
3 // Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
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7 // terms of the GNU General Public License as published by the
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12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
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18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
21 // As a special exception, you may use this file as part of a free software
22 // library without restriction. Specifically, if other files instantiate
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28 // the GNU General Public License.
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44 * Copyright (c) 1996-1999
45 * Silicon Graphics Computer Systems, Inc.
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48 * and its documentation for any purpose is hereby granted without fee,
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56 /** @file stl_bvector.h
57 * This is an internal header file, included by other library headers.
58 * You should not attempt to use it directly.
64 namespace _GLIBCXX_STD
66 typedef unsigned long _Bit_type
;
67 enum { _S_word_bit
= int(CHAR_BIT
* sizeof(_Bit_type
)) };
74 _Bit_reference(_Bit_type
* __x
, _Bit_type __y
)
75 : _M_p(__x
), _M_mask(__y
) { }
77 _Bit_reference() : _M_p(0), _M_mask(0) { }
79 operator bool() const { return !!(*_M_p
& _M_mask
); }
92 operator=(const _Bit_reference
& __x
)
93 { return *this = bool(__x
); }
96 operator==(const _Bit_reference
& __x
) const
97 { return bool(*this) == bool(__x
); }
100 operator<(const _Bit_reference
& __x
) const
101 { return !bool(*this) && bool(__x
); }
104 flip() { *_M_p
^= _M_mask
; }
107 struct _Bit_iterator_base
: public iterator
<random_access_iterator_tag
, bool>
110 unsigned int _M_offset
;
112 _Bit_iterator_base(_Bit_type
* __x
, unsigned int __y
)
113 : _M_p(__x
), _M_offset(__y
) { }
118 if (_M_offset
++ == _S_word_bit
- 1)
128 if (_M_offset
-- == 0)
130 _M_offset
= _S_word_bit
- 1;
136 _M_incr(ptrdiff_t __i
)
138 difference_type __n
= __i
+ _M_offset
;
139 _M_p
+= __n
/ _S_word_bit
;
140 __n
= __n
% _S_word_bit
;
143 _M_offset
= static_cast<unsigned int>(__n
+ _S_word_bit
);
147 _M_offset
= static_cast<unsigned int>(__n
);
151 operator==(const _Bit_iterator_base
& __i
) const
152 { return _M_p
== __i
._M_p
&& _M_offset
== __i
._M_offset
; }
155 operator<(const _Bit_iterator_base
& __i
) const
157 return _M_p
< __i
._M_p
158 || (_M_p
== __i
._M_p
&& _M_offset
< __i
._M_offset
);
162 operator!=(const _Bit_iterator_base
& __i
) const
163 { return !(*this == __i
); }
166 operator>(const _Bit_iterator_base
& __i
) const
167 { return __i
< *this; }
170 operator<=(const _Bit_iterator_base
& __i
) const
171 { return !(__i
< *this); }
174 operator>=(const _Bit_iterator_base
& __i
) const
175 { return !(*this < __i
); }
179 operator-(const _Bit_iterator_base
& __x
, const _Bit_iterator_base
& __y
)
181 return _S_word_bit
* (__x
._M_p
- __y
._M_p
) + __x
._M_offset
- __y
._M_offset
;
184 struct _Bit_iterator
: public _Bit_iterator_base
186 typedef _Bit_reference reference
;
187 typedef _Bit_reference
* pointer
;
188 typedef _Bit_iterator iterator
;
190 _Bit_iterator() : _Bit_iterator_base(0, 0) { }
191 _Bit_iterator(_Bit_type
* __x
, unsigned int __y
)
192 : _Bit_iterator_base(__x
, __y
) { }
195 operator*() const { return reference(_M_p
, 1UL << _M_offset
); }
207 iterator __tmp
= *this;
222 iterator __tmp
= *this;
228 operator+=(difference_type __i
)
235 operator-=(difference_type __i
)
242 operator+(difference_type __i
) const
244 iterator __tmp
= *this;
249 operator-(difference_type __i
) const
251 iterator __tmp
= *this;
256 operator[](difference_type __i
)
257 { return *(*this + __i
); }
261 operator+(ptrdiff_t __n
, const _Bit_iterator
& __x
) { return __x
+ __n
; }
264 struct _Bit_const_iterator
: public _Bit_iterator_base
266 typedef bool reference
;
267 typedef bool const_reference
;
268 typedef const bool* pointer
;
269 typedef _Bit_const_iterator const_iterator
;
271 _Bit_const_iterator() : _Bit_iterator_base(0, 0) { }
272 _Bit_const_iterator(_Bit_type
* __x
, unsigned int __y
)
273 : _Bit_iterator_base(__x
, __y
) { }
274 _Bit_const_iterator(const _Bit_iterator
& __x
)
275 : _Bit_iterator_base(__x
._M_p
, __x
._M_offset
) { }
279 { return _Bit_reference(_M_p
, 1UL << _M_offset
); }
291 const_iterator __tmp
= *this;
306 const_iterator __tmp
= *this;
312 operator+=(difference_type __i
)
319 operator-=(difference_type __i
)
326 operator+(difference_type __i
) const
328 const_iterator __tmp
= *this;
333 operator-(difference_type __i
) const
335 const_iterator __tmp
= *this;
340 operator[](difference_type __i
)
341 { return *(*this + __i
); }
344 inline _Bit_const_iterator
345 operator+(ptrdiff_t __n
, const _Bit_const_iterator
& __x
)
346 { return __x
+ __n
; }
348 template<class _Alloc
>
351 typedef typename
_Alloc::template rebind
<_Bit_type
>::other
354 struct _Bvector_impl
: public _Bit_alloc_type
356 _Bit_iterator _M_start
;
357 _Bit_iterator _M_finish
;
358 _Bit_type
* _M_end_of_storage
;
359 _Bvector_impl(const _Bit_alloc_type
& __a
)
360 : _Bit_alloc_type(__a
), _M_start(), _M_finish(), _M_end_of_storage(0)
365 typedef _Alloc allocator_type
;
368 get_allocator() const
369 { return *static_cast<const _Bit_alloc_type
*>(&this->_M_impl
); }
371 _Bvector_base(const allocator_type
& __a
) : _M_impl(__a
) { }
373 ~_Bvector_base() { this->_M_deallocate(); }
376 _Bvector_impl _M_impl
;
379 _M_allocate(size_t __n
)
380 { return _M_impl
.allocate((__n
+ _S_word_bit
- 1) / _S_word_bit
); }
385 if (_M_impl
._M_start
._M_p
)
386 _M_impl
.deallocate(_M_impl
._M_start
._M_p
,
387 _M_impl
._M_end_of_storage
- _M_impl
._M_start
._M_p
);
392 // Declare a partial specialization of vector<T, Alloc>.
393 #include <bits/stl_vector.h>
395 namespace _GLIBCXX_STD
398 * @brief A specialization of vector for booleans which offers fixed time
399 * access to individual elements in any order.
401 * Note that vector<bool> does not actually meet the requirements for being
402 * a container. This is because the reference and pointer types are not
403 * really references and pointers to bool. See DR96 for details. @see
404 * vector for function documentation.
406 * @ingroup Containers
409 * In some terminology a %vector can be described as a dynamic
410 * C-style array, it offers fast and efficient access to individual
411 * elements in any order and saves the user from worrying about
412 * memory and size allocation. Subscripting ( @c [] ) access is
413 * also provided as with C-style arrays.
415 template<typename _Alloc
>
416 class vector
<bool, _Alloc
> : public _Bvector_base
<_Alloc
>
419 typedef bool value_type
;
420 typedef size_t size_type
;
421 typedef ptrdiff_t difference_type
;
422 typedef _Bit_reference reference
;
423 typedef bool const_reference
;
424 typedef _Bit_reference
* pointer
;
425 typedef const bool* const_pointer
;
427 typedef _Bit_iterator iterator
;
428 typedef _Bit_const_iterator const_iterator
;
430 typedef std::reverse_iterator
<const_iterator
> const_reverse_iterator
;
431 typedef std::reverse_iterator
<iterator
> reverse_iterator
;
433 typedef typename _Bvector_base
<_Alloc
>::allocator_type allocator_type
;
435 allocator_type
get_allocator() const
436 { return _Bvector_base
<_Alloc
>::get_allocator(); }
439 using _Bvector_base
<_Alloc
>::_M_allocate
;
440 using _Bvector_base
<_Alloc
>::_M_deallocate
;
443 void _M_initialize(size_type __n
)
445 _Bit_type
* __q
= this->_M_allocate(__n
);
446 this->_M_impl
._M_end_of_storage
= __q
447 + (__n
+ _S_word_bit
- 1) / _S_word_bit
;
448 this->_M_impl
._M_start
= iterator(__q
, 0);
449 this->_M_impl
._M_finish
= this->_M_impl
._M_start
+ difference_type(__n
);
452 void _M_insert_aux(iterator __position
, bool __x
)
454 if (this->_M_impl
._M_finish
._M_p
!= this->_M_impl
._M_end_of_storage
)
456 std::copy_backward(__position
, this->_M_impl
._M_finish
,
457 this->_M_impl
._M_finish
+ 1);
459 ++this->_M_impl
._M_finish
;
463 const size_type __len
= size() ? 2 * size()
464 : static_cast<size_type
>(_S_word_bit
);
465 _Bit_type
* __q
= this->_M_allocate(__len
);
466 iterator __i
= std::copy(begin(), __position
, iterator(__q
, 0));
468 this->_M_impl
._M_finish
= std::copy(__position
, end(), __i
);
469 this->_M_deallocate();
470 this->_M_impl
._M_end_of_storage
= __q
+ (__len
+ _S_word_bit
- 1)
472 this->_M_impl
._M_start
= iterator(__q
, 0);
476 template<class _InputIterator
>
477 void _M_initialize_range(_InputIterator __first
, _InputIterator __last
,
480 this->_M_impl
._M_start
= iterator();
481 this->_M_impl
._M_finish
= iterator();
482 this->_M_impl
._M_end_of_storage
= 0;
483 for ( ; __first
!= __last
; ++__first
)
487 template<class _ForwardIterator
>
488 void _M_initialize_range(_ForwardIterator __first
, _ForwardIterator __last
,
489 forward_iterator_tag
)
491 const size_type __n
= std::distance(__first
, __last
);
493 std::copy(__first
, __last
, this->_M_impl
._M_start
);
496 template<class _InputIterator
>
497 void _M_insert_range(iterator __pos
, _InputIterator __first
,
498 _InputIterator __last
, input_iterator_tag
)
500 for ( ; __first
!= __last
; ++__first
)
502 __pos
= insert(__pos
, *__first
);
507 template<class _ForwardIterator
>
508 void _M_insert_range(iterator __position
, _ForwardIterator __first
,
509 _ForwardIterator __last
, forward_iterator_tag
)
511 if (__first
!= __last
)
513 size_type __n
= std::distance(__first
, __last
);
514 if (capacity() - size() >= __n
)
516 std::copy_backward(__position
, end(),
517 this->_M_impl
._M_finish
+ difference_type(__n
));
518 std::copy(__first
, __last
, __position
);
519 this->_M_impl
._M_finish
+= difference_type(__n
);
523 const size_type __len
= size() + std::max(size(), __n
);
524 _Bit_type
* __q
= this->_M_allocate(__len
);
525 iterator __i
= std::copy(begin(), __position
, iterator(__q
, 0));
526 __i
= std::copy(__first
, __last
, __i
);
527 this->_M_impl
._M_finish
= std::copy(__position
, end(), __i
);
528 this->_M_deallocate();
529 this->_M_impl
._M_end_of_storage
= __q
+ (__len
+ _S_word_bit
- 1)
531 this->_M_impl
._M_start
= iterator(__q
, 0);
538 { return this->_M_impl
._M_start
; }
540 const_iterator
begin() const
541 { return this->_M_impl
._M_start
; }
544 { return this->_M_impl
._M_finish
; }
546 const_iterator
end() const
547 { return this->_M_impl
._M_finish
; }
549 reverse_iterator
rbegin()
550 { return reverse_iterator(end()); }
552 const_reverse_iterator
rbegin() const
553 { return const_reverse_iterator(end()); }
555 reverse_iterator
rend()
556 { return reverse_iterator(begin()); }
558 const_reverse_iterator
rend() const
559 { return const_reverse_iterator(begin()); }
561 size_type
size() const
562 { return size_type(end() - begin()); }
564 size_type
max_size() const
565 { return size_type(-1); }
567 size_type
capacity() const
568 { return size_type(const_iterator(this->_M_impl
._M_end_of_storage
, 0)
571 { return begin() == end(); }
573 reference
operator[](size_type __n
)
574 { return *(begin() + difference_type(__n
)); }
576 const_reference
operator[](size_type __n
) const
577 { return *(begin() + difference_type(__n
)); }
579 void _M_range_check(size_type __n
) const
581 if (__n
>= this->size())
582 __throw_out_of_range(__N("vector<bool>::_M_range_check"));
585 reference
at(size_type __n
)
586 { _M_range_check(__n
); return (*this)[__n
]; }
588 const_reference
at(size_type __n
) const
589 { _M_range_check(__n
); return (*this)[__n
]; }
591 explicit vector(const allocator_type
& __a
= allocator_type())
592 : _Bvector_base
<_Alloc
>(__a
) { }
594 vector(size_type __n
, bool __value
,
595 const allocator_type
& __a
= allocator_type())
596 : _Bvector_base
<_Alloc
>(__a
)
599 std::fill(this->_M_impl
._M_start
._M_p
, this->_M_impl
._M_end_of_storage
,
603 explicit vector(size_type __n
)
604 : _Bvector_base
<_Alloc
>(allocator_type())
607 std::fill(this->_M_impl
._M_start
._M_p
,
608 this->_M_impl
._M_end_of_storage
, 0);
611 vector(const vector
& __x
) : _Bvector_base
<_Alloc
>(__x
.get_allocator())
613 _M_initialize(__x
.size());
614 std::copy(__x
.begin(), __x
.end(), this->_M_impl
._M_start
);
617 // Check whether it's an integral type. If so, it's not an iterator.
618 template<class _Integer
>
619 void _M_initialize_dispatch(_Integer __n
, _Integer __x
, __true_type
)
622 std::fill(this->_M_impl
._M_start
._M_p
,
623 this->_M_impl
._M_end_of_storage
, __x
? ~0 : 0);
626 template<class _InputIterator
>
628 _M_initialize_dispatch(_InputIterator __first
, _InputIterator __last
,
630 { _M_initialize_range(__first
, __last
,
631 std::__iterator_category(__first
)); }
633 template<class _InputIterator
>
634 vector(_InputIterator __first
, _InputIterator __last
,
635 const allocator_type
& __a
= allocator_type())
636 : _Bvector_base
<_Alloc
>(__a
)
638 typedef typename _Is_integer
<_InputIterator
>::_Integral _Integral
;
639 _M_initialize_dispatch(__first
, __last
, _Integral());
644 vector
& operator=(const vector
& __x
)
648 if (__x
.size() > capacity())
650 this->_M_deallocate();
651 _M_initialize(__x
.size());
653 std::copy(__x
.begin(), __x
.end(), begin());
654 this->_M_impl
._M_finish
= begin() + difference_type(__x
.size());
658 // assign(), a generalized assignment member function. Two
659 // versions: one that takes a count, and one that takes a range.
660 // The range version is a member template, so we dispatch on whether
661 // or not the type is an integer.
663 void _M_fill_assign(size_t __n
, bool __x
)
667 std::fill(this->_M_impl
._M_start
._M_p
,
668 this->_M_impl
._M_end_of_storage
, __x
? ~0 : 0);
669 insert(end(), __n
- size(), __x
);
673 erase(begin() + __n
, end());
674 std::fill(this->_M_impl
._M_start
._M_p
,
675 this->_M_impl
._M_end_of_storage
, __x
? ~0 : 0);
679 void assign(size_t __n
, bool __x
)
680 { _M_fill_assign(__n
, __x
); }
682 template<class _InputIterator
>
683 void assign(_InputIterator __first
, _InputIterator __last
)
685 typedef typename _Is_integer
<_InputIterator
>::_Integral _Integral
;
686 _M_assign_dispatch(__first
, __last
, _Integral());
689 template<class _Integer
>
690 void _M_assign_dispatch(_Integer __n
, _Integer __val
, __true_type
)
691 { _M_fill_assign((size_t) __n
, (bool) __val
); }
693 template<class _InputIterator
>
694 void _M_assign_dispatch(_InputIterator __first
, _InputIterator __last
,
696 { _M_assign_aux(__first
, __last
, std::__iterator_category(__first
)); }
698 template<class _InputIterator
>
699 void _M_assign_aux(_InputIterator __first
, _InputIterator __last
,
702 iterator __cur
= begin();
703 for ( ; __first
!= __last
&& __cur
!= end(); ++__cur
, ++__first
)
705 if (__first
== __last
)
708 insert(end(), __first
, __last
);
711 template<class _ForwardIterator
>
712 void _M_assign_aux(_ForwardIterator __first
, _ForwardIterator __last
,
713 forward_iterator_tag
)
715 const size_type __len
= std::distance(__first
, __last
);
717 erase(std::copy(__first
, __last
, begin()), end());
720 _ForwardIterator __mid
= __first
;
721 std::advance(__mid
, size());
722 std::copy(__first
, __mid
, begin());
723 insert(end(), __mid
, __last
);
727 void reserve(size_type __n
)
729 if (__n
> this->max_size())
730 __throw_length_error(__N("vector::reserve"));
731 if (this->capacity() < __n
)
733 _Bit_type
* __q
= this->_M_allocate(__n
);
734 this->_M_impl
._M_finish
= std::copy(begin(), end(),
736 this->_M_deallocate();
737 this->_M_impl
._M_start
= iterator(__q
, 0);
738 this->_M_impl
._M_end_of_storage
= __q
+ (__n
+ _S_word_bit
- 1) / _S_word_bit
;
745 const_reference
front() const
749 { return *(end() - 1); }
751 const_reference
back() const
752 { return *(end() - 1); }
754 void push_back(bool __x
)
756 if (this->_M_impl
._M_finish
._M_p
!= this->_M_impl
._M_end_of_storage
)
757 *this->_M_impl
._M_finish
++ = __x
;
759 _M_insert_aux(end(), __x
);
762 void swap(vector
<bool, _Alloc
>& __x
)
764 std::swap(this->_M_impl
._M_start
, __x
._M_impl
._M_start
);
765 std::swap(this->_M_impl
._M_finish
, __x
._M_impl
._M_finish
);
766 std::swap(this->_M_impl
._M_end_of_storage
,
767 __x
._M_impl
._M_end_of_storage
);
770 // [23.2.5]/1, third-to-last entry in synopsis listing
771 static void swap(reference __x
, reference __y
)
778 iterator
insert(iterator __position
, bool __x
= bool())
780 const difference_type __n
= __position
- begin();
781 if (this->_M_impl
._M_finish
._M_p
!= this->_M_impl
._M_end_of_storage
782 && __position
== end())
783 *this->_M_impl
._M_finish
++ = __x
;
785 _M_insert_aux(__position
, __x
);
786 return begin() + __n
;
789 // Check whether it's an integral type. If so, it's not an iterator.
791 template<class _Integer
>
792 void _M_insert_dispatch(iterator __pos
, _Integer __n
, _Integer __x
,
794 { _M_fill_insert(__pos
, __n
, __x
); }
796 template<class _InputIterator
>
797 void _M_insert_dispatch(iterator __pos
,
798 _InputIterator __first
, _InputIterator __last
,
800 { _M_insert_range(__pos
, __first
, __last
,
801 std::__iterator_category(__first
)); }
803 template<class _InputIterator
>
804 void insert(iterator __position
,
805 _InputIterator __first
, _InputIterator __last
)
807 typedef typename _Is_integer
<_InputIterator
>::_Integral _Integral
;
808 _M_insert_dispatch(__position
, __first
, __last
, _Integral());
811 void _M_fill_insert(iterator __position
, size_type __n
, bool __x
)
815 if (capacity() - size() >= __n
)
817 std::copy_backward(__position
, end(),
818 this->_M_impl
._M_finish
+ difference_type(__n
));
819 std::fill(__position
, __position
+ difference_type(__n
), __x
);
820 this->_M_impl
._M_finish
+= difference_type(__n
);
824 const size_type __len
= size() + std::max(size(), __n
);
825 _Bit_type
* __q
= this->_M_allocate(__len
);
826 iterator __i
= std::copy(begin(), __position
, iterator(__q
, 0));
827 std::fill_n(__i
, __n
, __x
);
828 this->_M_impl
._M_finish
= std::copy(__position
, end(),
829 __i
+ difference_type(__n
));
830 this->_M_deallocate();
831 this->_M_impl
._M_end_of_storage
= __q
+ (__len
+ _S_word_bit
- 1)
833 this->_M_impl
._M_start
= iterator(__q
, 0);
837 void insert(iterator __position
, size_type __n
, bool __x
)
838 { _M_fill_insert(__position
, __n
, __x
); }
841 { --this->_M_impl
._M_finish
; }
843 iterator
erase(iterator __position
)
845 if (__position
+ 1 != end())
846 std::copy(__position
+ 1, end(), __position
);
847 --this->_M_impl
._M_finish
;
851 iterator
erase(iterator __first
, iterator __last
)
853 this->_M_impl
._M_finish
= std::copy(__last
, end(), __first
);
857 void resize(size_type __new_size
, bool __x
= bool())
859 if (__new_size
< size())
860 erase(begin() + difference_type(__new_size
), end());
862 insert(end(), __new_size
- size(), __x
);
867 for (_Bit_type
* __p
= this->_M_impl
._M_start
._M_p
;
868 __p
!= this->_M_impl
._M_end_of_storage
; ++__p
)
873 { erase(begin(), end()); }