1 // vector<bool> specialization -*- C++ -*-
3 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
4 // Free Software Foundation, Inc.
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 2, or (at your option)
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
17 // You should have received a copy of the GNU General Public License along
18 // with this library; see the file COPYING. If not, write to the Free
19 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
22 // As a special exception, you may use this file as part of a free software
23 // library without restriction. Specifically, if other files instantiate
24 // templates or use macros or inline functions from this file, or you compile
25 // this file and link it with other files to produce an executable, this
26 // file does not by itself cause the resulting executable to be covered by
27 // the GNU General Public License. This exception does not however
28 // invalidate any other reasons why the executable file might be covered by
29 // the GNU General Public License.
34 * Hewlett-Packard Company
36 * Permission to use, copy, modify, distribute and sell this software
37 * and its documentation for any purpose is hereby granted without fee,
38 * provided that the above copyright notice appear in all copies and
39 * that both that copyright notice and this permission notice appear
40 * in supporting documentation. Hewlett-Packard Company makes no
41 * representations about the suitability of this software for any
42 * purpose. It is provided "as is" without express or implied warranty.
45 * Copyright (c) 1996-1999
46 * Silicon Graphics Computer Systems, Inc.
48 * Permission to use, copy, modify, distribute and sell this software
49 * and its documentation for any purpose is hereby granted without fee,
50 * provided that the above copyright notice appear in all copies and
51 * that both that copyright notice and this permission notice appear
52 * in supporting documentation. Silicon Graphics makes no
53 * representations about the suitability of this software for any
54 * purpose. It is provided "as is" without express or implied warranty.
57 /** @file stl_bvector.h
58 * This is an internal header file, included by other library headers.
59 * You should not attempt to use it directly.
65 _GLIBCXX_BEGIN_NESTED_NAMESPACE(std
, _GLIBCXX_STD
)
67 typedef unsigned long _Bit_type
;
68 enum { _S_word_bit
= int(__CHAR_BIT__
* sizeof(_Bit_type
)) };
75 _Bit_reference(_Bit_type
* __x
, _Bit_type __y
)
76 : _M_p(__x
), _M_mask(__y
) { }
78 _Bit_reference() : _M_p(0), _M_mask(0) { }
81 { return !!(*_M_p
& _M_mask
); }
94 operator=(const _Bit_reference
& __x
)
95 { return *this = bool(__x
); }
98 operator==(const _Bit_reference
& __x
) const
99 { return bool(*this) == bool(__x
); }
102 operator<(const _Bit_reference
& __x
) const
103 { return !bool(*this) && bool(__x
); }
107 { *_M_p
^= _M_mask
; }
110 struct _Bit_iterator_base
111 : public std::iterator
<std::random_access_iterator_tag
, bool>
114 unsigned int _M_offset
;
116 _Bit_iterator_base(_Bit_type
* __x
, unsigned int __y
)
117 : _M_p(__x
), _M_offset(__y
) { }
122 if (_M_offset
++ == int(_S_word_bit
) - 1)
132 if (_M_offset
-- == 0)
134 _M_offset
= int(_S_word_bit
) - 1;
140 _M_incr(ptrdiff_t __i
)
142 difference_type __n
= __i
+ _M_offset
;
143 _M_p
+= __n
/ int(_S_word_bit
);
144 __n
= __n
% int(_S_word_bit
);
147 __n
+= int(_S_word_bit
);
150 _M_offset
= static_cast<unsigned int>(__n
);
154 operator==(const _Bit_iterator_base
& __i
) const
155 { return _M_p
== __i
._M_p
&& _M_offset
== __i
._M_offset
; }
158 operator<(const _Bit_iterator_base
& __i
) const
160 return _M_p
< __i
._M_p
161 || (_M_p
== __i
._M_p
&& _M_offset
< __i
._M_offset
);
165 operator!=(const _Bit_iterator_base
& __i
) const
166 { return !(*this == __i
); }
169 operator>(const _Bit_iterator_base
& __i
) const
170 { return __i
< *this; }
173 operator<=(const _Bit_iterator_base
& __i
) const
174 { return !(__i
< *this); }
177 operator>=(const _Bit_iterator_base
& __i
) const
178 { return !(*this < __i
); }
182 operator-(const _Bit_iterator_base
& __x
, const _Bit_iterator_base
& __y
)
184 return (int(_S_word_bit
) * (__x
._M_p
- __y
._M_p
)
185 + __x
._M_offset
- __y
._M_offset
);
188 struct _Bit_iterator
: public _Bit_iterator_base
190 typedef _Bit_reference reference
;
191 typedef _Bit_reference
* pointer
;
192 typedef _Bit_iterator iterator
;
194 _Bit_iterator() : _Bit_iterator_base(0, 0) { }
196 _Bit_iterator(_Bit_type
* __x
, unsigned int __y
)
197 : _Bit_iterator_base(__x
, __y
) { }
201 { return reference(_M_p
, 1UL << _M_offset
); }
213 iterator __tmp
= *this;
228 iterator __tmp
= *this;
234 operator+=(difference_type __i
)
241 operator-=(difference_type __i
)
248 operator+(difference_type __i
) const
250 iterator __tmp
= *this;
255 operator-(difference_type __i
) const
257 iterator __tmp
= *this;
262 operator[](difference_type __i
) const
263 { return *(*this + __i
); }
267 operator+(ptrdiff_t __n
, const _Bit_iterator
& __x
)
268 { return __x
+ __n
; }
270 struct _Bit_const_iterator
: public _Bit_iterator_base
272 typedef bool reference
;
273 typedef bool const_reference
;
274 typedef const bool* pointer
;
275 typedef _Bit_const_iterator const_iterator
;
277 _Bit_const_iterator() : _Bit_iterator_base(0, 0) { }
279 _Bit_const_iterator(_Bit_type
* __x
, unsigned int __y
)
280 : _Bit_iterator_base(__x
, __y
) { }
282 _Bit_const_iterator(const _Bit_iterator
& __x
)
283 : _Bit_iterator_base(__x
._M_p
, __x
._M_offset
) { }
287 { return _Bit_reference(_M_p
, 1UL << _M_offset
); }
299 const_iterator __tmp
= *this;
314 const_iterator __tmp
= *this;
320 operator+=(difference_type __i
)
327 operator-=(difference_type __i
)
334 operator+(difference_type __i
) const
336 const_iterator __tmp
= *this;
341 operator-(difference_type __i
) const
343 const_iterator __tmp
= *this;
348 operator[](difference_type __i
) const
349 { return *(*this + __i
); }
352 inline _Bit_const_iterator
353 operator+(ptrdiff_t __n
, const _Bit_const_iterator
& __x
)
354 { return __x
+ __n
; }
357 __fill_bvector(_Bit_iterator __first
, _Bit_iterator __last
, bool __x
)
359 for (; __first
!= __last
; ++__first
)
364 fill(_Bit_iterator __first
, _Bit_iterator __last
, const bool& __x
)
366 if (__first
._M_p
!= __last
._M_p
)
368 std::fill(__first
._M_p
+ 1, __last
._M_p
, __x
? ~0 : 0);
369 __fill_bvector(__first
, _Bit_iterator(__first
._M_p
+ 1, 0), __x
);
370 __fill_bvector(_Bit_iterator(__last
._M_p
, 0), __last
, __x
);
373 __fill_bvector(__first
, __last
, __x
);
376 template<typename _Alloc
>
379 typedef typename
_Alloc::template rebind
<_Bit_type
>::other
383 : public _Bit_alloc_type
385 _Bit_iterator _M_start
;
386 _Bit_iterator _M_finish
;
387 _Bit_type
* _M_end_of_storage
;
388 _Bvector_impl(const _Bit_alloc_type
& __a
)
389 : _Bit_alloc_type(__a
), _M_start(), _M_finish(), _M_end_of_storage(0)
394 typedef _Alloc allocator_type
;
397 _M_get_Bit_allocator()
398 { return *static_cast<_Bit_alloc_type
*>(&this->_M_impl
); }
400 const _Bit_alloc_type
&
401 _M_get_Bit_allocator() const
402 { return *static_cast<const _Bit_alloc_type
*>(&this->_M_impl
); }
405 get_allocator() const
406 { return allocator_type(_M_get_Bit_allocator()); }
408 _Bvector_base(const allocator_type
& __a
) : _M_impl(__a
) { }
411 { this->_M_deallocate(); }
414 _Bvector_impl _M_impl
;
417 _M_allocate(size_t __n
)
418 { return _M_impl
.allocate((__n
+ int(_S_word_bit
) - 1)
419 / int(_S_word_bit
)); }
424 if (_M_impl
._M_start
._M_p
)
425 _M_impl
.deallocate(_M_impl
._M_start
._M_p
,
426 _M_impl
._M_end_of_storage
- _M_impl
._M_start
._M_p
);
430 _GLIBCXX_END_NESTED_NAMESPACE
432 // Declare a partial specialization of vector<T, Alloc>.
433 #include <bits/stl_vector.h>
435 _GLIBCXX_BEGIN_NESTED_NAMESPACE(std
, _GLIBCXX_STD
)
438 * @brief A specialization of vector for booleans which offers fixed time
439 * access to individual elements in any order.
441 * Note that vector<bool> does not actually meet the requirements for being
442 * a container. This is because the reference and pointer types are not
443 * really references and pointers to bool. See DR96 for details. @see
444 * vector for function documentation.
446 * @ingroup Containers
449 * In some terminology a %vector can be described as a dynamic
450 * C-style array, it offers fast and efficient access to individual
451 * elements in any order and saves the user from worrying about
452 * memory and size allocation. Subscripting ( @c [] ) access is
453 * also provided as with C-style arrays.
455 template<typename _Alloc
>
456 class vector
<bool, _Alloc
> : protected _Bvector_base
<_Alloc
>
458 typedef _Bvector_base
<_Alloc
> _Base
;
461 typedef bool value_type
;
462 typedef size_t size_type
;
463 typedef ptrdiff_t difference_type
;
464 typedef _Bit_reference reference
;
465 typedef bool const_reference
;
466 typedef _Bit_reference
* pointer
;
467 typedef const bool* const_pointer
;
468 typedef _Bit_iterator iterator
;
469 typedef _Bit_const_iterator const_iterator
;
470 typedef std::reverse_iterator
<const_iterator
> const_reverse_iterator
;
471 typedef std::reverse_iterator
<iterator
> reverse_iterator
;
472 typedef _Alloc allocator_type
;
474 allocator_type
get_allocator() const
475 { return _Base::get_allocator(); }
478 using _Base::_M_allocate
;
479 using _Base::_M_deallocate
;
480 using _Base::_M_get_Bit_allocator
;
484 vector(const allocator_type
& __a
= allocator_type())
488 vector(size_type __n
, const bool& __value
= bool(),
489 const allocator_type
& __a
= allocator_type())
493 std::fill(this->_M_impl
._M_start
._M_p
, this->_M_impl
._M_end_of_storage
,
497 vector(const vector
& __x
)
498 : _Base(__x
._M_get_Bit_allocator())
500 _M_initialize(__x
.size());
501 _M_copy_aligned(__x
.begin(), __x
.end(), this->_M_impl
._M_start
);
504 template<typename _InputIterator
>
505 vector(_InputIterator __first
, _InputIterator __last
,
506 const allocator_type
& __a
= allocator_type())
509 typedef typename
std::__is_integer
<_InputIterator
>::__type _Integral
;
510 _M_initialize_dispatch(__first
, __last
, _Integral());
516 operator=(const vector
& __x
)
520 if (__x
.size() > capacity())
522 this->_M_deallocate();
523 _M_initialize(__x
.size());
525 this->_M_impl
._M_finish
= _M_copy_aligned(__x
.begin(), __x
.end(),
530 // assign(), a generalized assignment member function. Two
531 // versions: one that takes a count, and one that takes a range.
532 // The range version is a member template, so we dispatch on whether
533 // or not the type is an integer.
535 assign(size_type __n
, const bool& __x
)
536 { _M_fill_assign(__n
, __x
); }
538 template<typename _InputIterator
>
540 assign(_InputIterator __first
, _InputIterator __last
)
542 typedef typename
std::__is_integer
<_InputIterator
>::__type _Integral
;
543 _M_assign_dispatch(__first
, __last
, _Integral());
548 { return this->_M_impl
._M_start
; }
552 { return this->_M_impl
._M_start
; }
556 { return this->_M_impl
._M_finish
; }
560 { return this->_M_impl
._M_finish
; }
564 { return reverse_iterator(end()); }
566 const_reverse_iterator
568 { return const_reverse_iterator(end()); }
572 { return reverse_iterator(begin()); }
574 const_reverse_iterator
576 { return const_reverse_iterator(begin()); }
580 { return size_type(end() - begin()); }
585 const size_type __asize
= _M_get_Bit_allocator().max_size();
586 return (__asize
<= size_type(-1) / int(_S_word_bit
) ?
587 __asize
* int(_S_word_bit
) : size_type(-1));
592 { return size_type(const_iterator(this->_M_impl
._M_end_of_storage
, 0)
597 { return begin() == end(); }
600 operator[](size_type __n
)
602 return *iterator(this->_M_impl
._M_start
._M_p
603 + __n
/ int(_S_word_bit
), __n
% int(_S_word_bit
));
607 operator[](size_type __n
) const
609 return *const_iterator(this->_M_impl
._M_start
._M_p
610 + __n
/ int(_S_word_bit
), __n
% int(_S_word_bit
));
615 _M_range_check(size_type __n
) const
617 if (__n
>= this->size())
618 __throw_out_of_range(__N("vector<bool>::_M_range_check"));
624 { _M_range_check(__n
); return (*this)[__n
]; }
627 at(size_type __n
) const
628 { _M_range_check(__n
); return (*this)[__n
]; }
631 reserve(size_type __n
)
633 if (__n
> this->max_size())
634 __throw_length_error(__N("vector::reserve"));
635 if (this->capacity() < __n
)
637 _Bit_type
* __q
= this->_M_allocate(__n
);
638 this->_M_impl
._M_finish
= _M_copy_aligned(begin(), end(),
640 this->_M_deallocate();
641 this->_M_impl
._M_start
= iterator(__q
, 0);
642 this->_M_impl
._M_end_of_storage
= (__q
+ (__n
+ int(_S_word_bit
) - 1)
657 { return *(end() - 1); }
661 { return *(end() - 1); }
663 // _GLIBCXX_RESOLVE_LIB_DEFECTS
664 // DR 464. Suggestion for new member functions in standard containers.
665 // N.B. DR 464 says nothing about vector<bool> but we need something
666 // here due to the way we are implementing DR 464 in the debug-mode
674 if (this->_M_impl
._M_finish
._M_p
!= this->_M_impl
._M_end_of_storage
)
675 *this->_M_impl
._M_finish
++ = __x
;
677 _M_insert_aux(end(), __x
);
681 swap(vector
<bool, _Alloc
>& __x
)
683 std::swap(this->_M_impl
._M_start
, __x
._M_impl
._M_start
);
684 std::swap(this->_M_impl
._M_finish
, __x
._M_impl
._M_finish
);
685 std::swap(this->_M_impl
._M_end_of_storage
,
686 __x
._M_impl
._M_end_of_storage
);
688 // _GLIBCXX_RESOLVE_LIB_DEFECTS
689 // 431. Swapping containers with unequal allocators.
690 std::__alloc_swap
<typename
_Base::_Bit_alloc_type
>::
691 _S_do_it(_M_get_Bit_allocator(), __x
._M_get_Bit_allocator());
694 // [23.2.5]/1, third-to-last entry in synopsis listing
696 swap(reference __x
, reference __y
)
704 insert(iterator __position
, const bool& __x
= bool())
706 const difference_type __n
= __position
- begin();
707 if (this->_M_impl
._M_finish
._M_p
!= this->_M_impl
._M_end_of_storage
708 && __position
== end())
709 *this->_M_impl
._M_finish
++ = __x
;
711 _M_insert_aux(__position
, __x
);
712 return begin() + __n
;
715 template<typename _InputIterator
>
717 insert(iterator __position
,
718 _InputIterator __first
, _InputIterator __last
)
720 typedef typename
std::__is_integer
<_InputIterator
>::__type _Integral
;
721 _M_insert_dispatch(__position
, __first
, __last
, _Integral());
725 insert(iterator __position
, size_type __n
, const bool& __x
)
726 { _M_fill_insert(__position
, __n
, __x
); }
730 { --this->_M_impl
._M_finish
; }
733 erase(iterator __position
)
735 if (__position
+ 1 != end())
736 std::copy(__position
+ 1, end(), __position
);
737 --this->_M_impl
._M_finish
;
742 erase(iterator __first
, iterator __last
)
744 _M_erase_at_end(std::copy(__last
, end(), __first
));
749 resize(size_type __new_size
, bool __x
= bool())
751 if (__new_size
< size())
752 _M_erase_at_end(begin() + difference_type(__new_size
));
754 insert(end(), __new_size
- size(), __x
);
760 for (_Bit_type
* __p
= this->_M_impl
._M_start
._M_p
;
761 __p
!= this->_M_impl
._M_end_of_storage
; ++__p
)
767 { _M_erase_at_end(begin()); }
771 // Precondition: __first._M_offset == 0 && __result._M_offset == 0.
773 _M_copy_aligned(const_iterator __first
, const_iterator __last
,
776 _Bit_type
* __q
= std::copy(__first
._M_p
, __last
._M_p
, __result
._M_p
);
777 return std::copy(const_iterator(__last
._M_p
, 0), __last
,
782 _M_initialize(size_type __n
)
784 _Bit_type
* __q
= this->_M_allocate(__n
);
785 this->_M_impl
._M_end_of_storage
= (__q
786 + ((__n
+ int(_S_word_bit
) - 1)
787 / int(_S_word_bit
)));
788 this->_M_impl
._M_start
= iterator(__q
, 0);
789 this->_M_impl
._M_finish
= this->_M_impl
._M_start
+ difference_type(__n
);
792 // Check whether it's an integral type. If so, it's not an iterator.
793 template<typename _Integer
>
795 _M_initialize_dispatch(_Integer __n
, _Integer __x
, __true_type
)
798 std::fill(this->_M_impl
._M_start
._M_p
,
799 this->_M_impl
._M_end_of_storage
, __x
? ~0 : 0);
802 template<typename _InputIterator
>
804 _M_initialize_dispatch(_InputIterator __first
, _InputIterator __last
,
806 { _M_initialize_range(__first
, __last
,
807 std::__iterator_category(__first
)); }
809 template<typename _InputIterator
>
811 _M_initialize_range(_InputIterator __first
, _InputIterator __last
,
812 std::input_iterator_tag
)
814 for (; __first
!= __last
; ++__first
)
818 template<typename _ForwardIterator
>
820 _M_initialize_range(_ForwardIterator __first
, _ForwardIterator __last
,
821 std::forward_iterator_tag
)
823 const size_type __n
= std::distance(__first
, __last
);
825 std::copy(__first
, __last
, this->_M_impl
._M_start
);
828 template<typename _Integer
>
830 _M_assign_dispatch(_Integer __n
, _Integer __val
, __true_type
)
831 { _M_fill_assign((size_t) __n
, (bool) __val
); }
833 template<class _InputIterator
>
835 _M_assign_dispatch(_InputIterator __first
, _InputIterator __last
,
837 { _M_assign_aux(__first
, __last
, std::__iterator_category(__first
)); }
840 _M_fill_assign(size_t __n
, bool __x
)
844 std::fill(this->_M_impl
._M_start
._M_p
,
845 this->_M_impl
._M_end_of_storage
, __x
? ~0 : 0);
846 insert(end(), __n
- size(), __x
);
850 _M_erase_at_end(begin() + __n
);
851 std::fill(this->_M_impl
._M_start
._M_p
,
852 this->_M_impl
._M_end_of_storage
, __x
? ~0 : 0);
856 template<typename _InputIterator
>
858 _M_assign_aux(_InputIterator __first
, _InputIterator __last
,
859 std::input_iterator_tag
)
861 iterator __cur
= begin();
862 for (; __first
!= __last
&& __cur
!= end(); ++__cur
, ++__first
)
864 if (__first
== __last
)
865 _M_erase_at_end(__cur
);
867 insert(end(), __first
, __last
);
870 template<typename _ForwardIterator
>
872 _M_assign_aux(_ForwardIterator __first
, _ForwardIterator __last
,
873 std::forward_iterator_tag
)
875 const size_type __len
= std::distance(__first
, __last
);
877 _M_erase_at_end(std::copy(__first
, __last
, begin()));
880 _ForwardIterator __mid
= __first
;
881 std::advance(__mid
, size());
882 std::copy(__first
, __mid
, begin());
883 insert(end(), __mid
, __last
);
887 // Check whether it's an integral type. If so, it's not an iterator.
888 template<typename _Integer
>
890 _M_insert_dispatch(iterator __pos
, _Integer __n
, _Integer __x
,
892 { _M_fill_insert(__pos
, __n
, __x
); }
894 template<typename _InputIterator
>
896 _M_insert_dispatch(iterator __pos
,
897 _InputIterator __first
, _InputIterator __last
,
899 { _M_insert_range(__pos
, __first
, __last
,
900 std::__iterator_category(__first
)); }
903 _M_fill_insert(iterator __position
, size_type __n
, bool __x
);
905 template<typename _InputIterator
>
907 _M_insert_range(iterator __pos
, _InputIterator __first
,
908 _InputIterator __last
, std::input_iterator_tag
)
910 for (; __first
!= __last
; ++__first
)
912 __pos
= insert(__pos
, *__first
);
917 template<typename _ForwardIterator
>
919 _M_insert_range(iterator __position
, _ForwardIterator __first
,
920 _ForwardIterator __last
, std::forward_iterator_tag
);
923 _M_insert_aux(iterator __position
, bool __x
);
926 _M_erase_at_end(iterator __pos
)
927 { this->_M_impl
._M_finish
= __pos
; }
930 _GLIBCXX_END_NESTED_NAMESPACE