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Diffstat (limited to 'libstdc++-v3/include/bits/stl_bvector.h')
| -rw-r--r-- | libstdc++-v3/include/bits/stl_bvector.h | 727 |
1 files changed, 727 insertions, 0 deletions
diff --git a/libstdc++-v3/include/bits/stl_bvector.h b/libstdc++-v3/include/bits/stl_bvector.h new file mode 100644 index 00000000000..9a46cf56589 --- /dev/null +++ b/libstdc++-v3/include/bits/stl_bvector.h @@ -0,0 +1,727 @@ +// bit_vector and vector<bool> specialization -*- C++ -*- + +// Copyright (C) 2001 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License along +// with this library; see the file COPYING. If not, write to the Free +// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, +// USA. + +// As a special exception, you may use this file as part of a free software +// library without restriction. Specifically, if other files instantiate +// templates or use macros or inline functions from this file, or you compile +// this file and link it with other files to produce an executable, this +// file does not by itself cause the resulting executable to be covered by +// the GNU General Public License. This exception does not however +// invalidate any other reasons why the executable file might be covered by +// the GNU General Public License. + +/* + * + * Copyright (c) 1994 + * Hewlett-Packard Company + * + * Permission to use, copy, modify, distribute and sell this software + * and its documentation for any purpose is hereby granted without fee, + * provided that the above copyright notice appear in all copies and + * that both that copyright notice and this permission notice appear + * in supporting documentation. Hewlett-Packard Company makes no + * representations about the suitability of this software for any + * purpose. It is provided "as is" without express or implied warranty. + * + * + * Copyright (c) 1996-1999 + * Silicon Graphics Computer Systems, Inc. + * + * Permission to use, copy, modify, distribute and sell this software + * and its documentation for any purpose is hereby granted without fee, + * provided that the above copyright notice appear in all copies and + * that both that copyright notice and this permission notice appear + * in supporting documentation. Silicon Graphics makes no + * representations about the suitability of this software for any + * purpose. It is provided "as is" without express or implied warranty. + */ + +/* NOTE: This is an internal header file, included by other STL headers. + * You should not attempt to use it directly. + */ + +#ifndef __SGI_STL_INTERNAL_BVECTOR_H +#define __SGI_STL_INTERNAL_BVECTOR_H + +namespace std +{ + +static const int __WORD_BIT = int(CHAR_BIT*sizeof(unsigned int)); + +struct _Bit_reference { + unsigned int* _M_p; + unsigned int _M_mask; + _Bit_reference(unsigned int* __x, unsigned int __y) + : _M_p(__x), _M_mask(__y) {} + +public: + _Bit_reference() : _M_p(0), _M_mask(0) {} + operator bool() const { return !(!(*_M_p & _M_mask)); } + _Bit_reference& operator=(bool __x) + { + if (__x) *_M_p |= _M_mask; + else *_M_p &= ~_M_mask; + return *this; + } + _Bit_reference& operator=(const _Bit_reference& __x) + { return *this = bool(__x); } + bool operator==(const _Bit_reference& __x) const + { return bool(*this) == bool(__x); } + bool operator<(const _Bit_reference& __x) const { + return !bool(*this) && bool(__x); + } + void flip() { *_M_p ^= _M_mask; } +}; + +inline void swap(_Bit_reference __x, _Bit_reference __y) +{ + bool __tmp = __x; + __x = __y; + __y = __tmp; +} + +struct _Bit_iterator_base : public random_access_iterator<bool, ptrdiff_t> +{ + unsigned int* _M_p; + unsigned int _M_offset; + + _Bit_iterator_base(unsigned int* __x, unsigned int __y) + : _M_p(__x), _M_offset(__y) {} + + void _M_bump_up() { + if (_M_offset++ == __WORD_BIT - 1) { + _M_offset = 0; + ++_M_p; + } + } + void _M_bump_down() { + if (_M_offset-- == 0) { + _M_offset = __WORD_BIT - 1; + --_M_p; + } + } + + void _M_incr(ptrdiff_t __i) { + difference_type __n = __i + _M_offset; + _M_p += __n / __WORD_BIT; + __n = __n % __WORD_BIT; + if (__n < 0) { + _M_offset = (unsigned int) __n + __WORD_BIT; + --_M_p; + } else + _M_offset = (unsigned int) __n; + } + + bool operator==(const _Bit_iterator_base& __i) const { + return _M_p == __i._M_p && _M_offset == __i._M_offset; + } + bool operator<(const _Bit_iterator_base& __i) const { + return _M_p < __i._M_p || (_M_p == __i._M_p && _M_offset < __i._M_offset); + } + bool operator!=(const _Bit_iterator_base& __i) const { + return !(*this == __i); + } + bool operator>(const _Bit_iterator_base& __i) const { + return __i < *this; + } + bool operator<=(const _Bit_iterator_base& __i) const { + return !(__i < *this); + } + bool operator>=(const _Bit_iterator_base& __i) const { + return !(*this < __i); + } +}; + +inline ptrdiff_t +operator-(const _Bit_iterator_base& __x, const _Bit_iterator_base& __y) { + return __WORD_BIT * (__x._M_p - __y._M_p) + __x._M_offset - __y._M_offset; +} + + +struct _Bit_iterator : public _Bit_iterator_base +{ + typedef _Bit_reference reference; + typedef _Bit_reference* pointer; + typedef _Bit_iterator iterator; + + _Bit_iterator() : _Bit_iterator_base(0, 0) {} + _Bit_iterator(unsigned int* __x, unsigned int __y) + : _Bit_iterator_base(__x, __y) {} + + reference operator*() const { return reference(_M_p, 1U << _M_offset); } + iterator& operator++() { + _M_bump_up(); + return *this; + } + iterator operator++(int) { + iterator __tmp = *this; + _M_bump_up(); + return __tmp; + } + iterator& operator--() { + _M_bump_down(); + return *this; + } + iterator operator--(int) { + iterator __tmp = *this; + _M_bump_down(); + return __tmp; + } + iterator& operator+=(difference_type __i) { + _M_incr(__i); + return *this; + } + iterator& operator-=(difference_type __i) { + *this += -__i; + return *this; + } + iterator operator+(difference_type __i) const { + iterator __tmp = *this; + return __tmp += __i; + } + iterator operator-(difference_type __i) const { + iterator __tmp = *this; + return __tmp -= __i; + } + + reference operator[](difference_type __i) { return *(*this + __i); } +}; + +inline _Bit_iterator +operator+(ptrdiff_t __n, const _Bit_iterator& __x) { return __x + __n; } + + +struct _Bit_const_iterator : public _Bit_iterator_base +{ + typedef bool reference; + typedef bool const_reference; + typedef const bool* pointer; + typedef _Bit_const_iterator const_iterator; + + _Bit_const_iterator() : _Bit_iterator_base(0, 0) {} + _Bit_const_iterator(unsigned int* __x, unsigned int __y) + : _Bit_iterator_base(__x, __y) {} + _Bit_const_iterator(const _Bit_iterator& __x) + : _Bit_iterator_base(__x._M_p, __x._M_offset) {} + + const_reference operator*() const { + return _Bit_reference(_M_p, 1U << _M_offset); + } + const_iterator& operator++() { + _M_bump_up(); + return *this; + } + const_iterator operator++(int) { + const_iterator __tmp = *this; + _M_bump_up(); + return __tmp; + } + const_iterator& operator--() { + _M_bump_down(); + return *this; + } + const_iterator operator--(int) { + const_iterator __tmp = *this; + _M_bump_down(); + return __tmp; + } + const_iterator& operator+=(difference_type __i) { + _M_incr(__i); + return *this; + } + const_iterator& operator-=(difference_type __i) { + *this += -__i; + return *this; + } + const_iterator operator+(difference_type __i) const { + const_iterator __tmp = *this; + return __tmp += __i; + } + const_iterator operator-(difference_type __i) const { + const_iterator __tmp = *this; + return __tmp -= __i; + } + const_reference operator[](difference_type __i) { + return *(*this + __i); + } +}; + +inline _Bit_const_iterator +operator+(ptrdiff_t __n, const _Bit_const_iterator& __x) { return __x + __n; } + + +// Bit-vector base class, which encapsulates the difference between +// old SGI-style allocators and standard-conforming allocators. + +// Base class for ordinary allocators. +template <class _Allocator, bool __is_static> +class _Bvector_alloc_base { +public: + typedef typename _Alloc_traits<bool, _Allocator>::allocator_type + allocator_type; + allocator_type get_allocator() const { return _M_data_allocator; } + + _Bvector_alloc_base(const allocator_type& __a) + : _M_data_allocator(__a), _M_start(), _M_finish(), _M_end_of_storage(0) {} + +protected: + unsigned int* _M_bit_alloc(size_t __n) + { return _M_data_allocator.allocate((__n + __WORD_BIT - 1)/__WORD_BIT); } + void _M_deallocate() { + if (_M_start._M_p) + _M_data_allocator.deallocate(_M_start._M_p, + _M_end_of_storage - _M_start._M_p); + } + + typename _Alloc_traits<unsigned int, _Allocator>::allocator_type + _M_data_allocator; + _Bit_iterator _M_start; + _Bit_iterator _M_finish; + unsigned int* _M_end_of_storage; +}; + +// Specialization for instanceless allocators. +template <class _Allocator> +class _Bvector_alloc_base<_Allocator, true> { +public: + typedef typename _Alloc_traits<bool, _Allocator>::allocator_type + allocator_type; + allocator_type get_allocator() const { return allocator_type(); } + + _Bvector_alloc_base(const allocator_type&) + : _M_start(), _M_finish(), _M_end_of_storage(0) {} + +protected: + typedef typename _Alloc_traits<unsigned int, _Allocator>::_Alloc_type + _Alloc_type; + + unsigned int* _M_bit_alloc(size_t __n) + { return _Alloc_type::allocate((__n + __WORD_BIT - 1)/__WORD_BIT); } + void _M_deallocate() { + if (_M_start._M_p) + _Alloc_type::deallocate(_M_start._M_p, + _M_end_of_storage - _M_start._M_p); + } + + _Bit_iterator _M_start; + _Bit_iterator _M_finish; + unsigned int* _M_end_of_storage; +}; + +template <class _Alloc> +class _Bvector_base + : public _Bvector_alloc_base<_Alloc, + _Alloc_traits<bool, _Alloc>::_S_instanceless> +{ + typedef _Bvector_alloc_base<_Alloc, + _Alloc_traits<bool, _Alloc>::_S_instanceless> + _Base; +public: + typedef typename _Base::allocator_type allocator_type; + + _Bvector_base(const allocator_type& __a) : _Base(__a) {} + ~_Bvector_base() { _Base::_M_deallocate(); } +}; + +} // namespace std + +// Declare a partial specialization of vector<T, Alloc>. +#include <bits/stl_vector.h> +namespace std +{ + +template <typename _Alloc> + class vector<bool, _Alloc> : public _Bvector_base<_Alloc> + { + public: + typedef bool value_type; + typedef size_t size_type; + typedef ptrdiff_t difference_type; + typedef _Bit_reference reference; + typedef bool const_reference; + typedef _Bit_reference* pointer; + typedef const bool* const_pointer; + + typedef _Bit_iterator iterator; + typedef _Bit_const_iterator const_iterator; + + typedef reverse_iterator<const_iterator> const_reverse_iterator; + typedef reverse_iterator<iterator> reverse_iterator; + + typedef typename _Bvector_base<_Alloc>::allocator_type allocator_type; + allocator_type get_allocator() const { + return _Bvector_base<_Alloc>::get_allocator(); + } + + protected: + using _Bvector_base<_Alloc>::_M_bit_alloc; + using _Bvector_base<_Alloc>::_M_deallocate; + using _Bvector_base<_Alloc>::_M_start; + using _Bvector_base<_Alloc>::_M_finish; + using _Bvector_base<_Alloc>::_M_end_of_storage; + + protected: + void _M_initialize(size_type __n) { + unsigned int* __q = _M_bit_alloc(__n); + _M_end_of_storage = __q + (__n + __WORD_BIT - 1)/__WORD_BIT; + _M_start = iterator(__q, 0); + _M_finish = _M_start + difference_type(__n); + } + void _M_insert_aux(iterator __position, bool __x) { + if (_M_finish._M_p != _M_end_of_storage) { + copy_backward(__position, _M_finish, _M_finish + 1); + *__position = __x; + ++_M_finish; + } + else { + size_type __len = size() ? 2 * size() : __WORD_BIT; + unsigned int* __q = _M_bit_alloc(__len); + iterator __i = copy(begin(), __position, iterator(__q, 0)); + *__i++ = __x; + _M_finish = copy(__position, end(), __i); + _M_deallocate(); + _M_end_of_storage = __q + (__len + __WORD_BIT - 1)/__WORD_BIT; + _M_start = iterator(__q, 0); + } + } + + template <class _InputIterator> + void _M_initialize_range(_InputIterator __first, _InputIterator __last, + input_iterator_tag) { + _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); + } + } + } + + 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)); } + + void _M_range_check(size_type __n) const { + if (__n >= this->size()) + __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]; } + + explicit vector(const allocator_type& __a = allocator_type()) + : _Bvector_base<_Alloc>(__a) {} + + vector(size_type __n, bool __value, + const allocator_type& __a = allocator_type()) + : _Bvector_base<_Alloc>(__a) + { + _M_initialize(__n); + fill(_M_start._M_p, _M_end_of_storage, __value ? ~0 : 0); + } + + explicit vector(size_type __n) + : _Bvector_base<_Alloc>(allocator_type()) + { + _M_initialize(__n); + fill(_M_start._M_p, _M_end_of_storage, 0); + } + + vector(const vector& __x) : _Bvector_base<_Alloc>(__x.get_allocator()) { + _M_initialize(__x.size()); + copy(__x.begin(), __x.end(), _M_start); + } + + // Check whether it's an integral type. If so, it's not an iterator. + + 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)); + } + + template <class _InputIterator> + vector(_InputIterator __first, _InputIterator __last, + const allocator_type& __a = allocator_type()) + : _Bvector_base<_Alloc>(__a) + { + typedef typename _Is_integer<_InputIterator>::_Integral _Integral; + _M_initialize_dispatch(__first, __last, _Integral()); + } + + ~vector() { } + + vector& operator=(const vector& __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); } + + 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); + } + } + + 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(vector<bool, _Alloc>& __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; + } + + // Check whether it's an integral type. If so, it's not an iterator. + + 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)); + } + + 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()); + } + + 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()); } + }; + +// This typedef is non-standard. It is provided for backward compatibility. +typedef vector<bool, alloc> bit_vector; + +} // namespace std + +#endif /* __SGI_STL_INTERNAL_BVECTOR_H */ + +// Local Variables: +// mode:C++ +// End: |