| // -*- C++ -*- |
| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___BIT_REFERENCE |
| #define _LIBCPP___BIT_REFERENCE |
| |
| #include <__config> |
| #include <__bits> |
| #include <algorithm> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| #pragma GCC system_header |
| #endif |
| |
| _LIBCPP_PUSH_MACROS |
| #include <__undef_macros> |
| |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _Cp, bool _IsConst, typename _Cp::__storage_type = 0> class __bit_iterator; |
| template <class _Cp> class __bit_const_reference; |
| |
| template <class _Tp> |
| struct __has_storage_type |
| { |
| static const bool value = false; |
| }; |
| |
| template <class _Cp, bool = __has_storage_type<_Cp>::value> |
| class __bit_reference |
| { |
| typedef typename _Cp::__storage_type __storage_type; |
| typedef typename _Cp::__storage_pointer __storage_pointer; |
| |
| __storage_pointer __seg_; |
| __storage_type __mask_; |
| |
| friend typename _Cp::__self; |
| |
| friend class __bit_const_reference<_Cp>; |
| friend class __bit_iterator<_Cp, false>; |
| public: |
| _LIBCPP_INLINE_VISIBILITY |
| __bit_reference(const __bit_reference&) = default; |
| |
| _LIBCPP_INLINE_VISIBILITY operator bool() const _NOEXCEPT |
| {return static_cast<bool>(*__seg_ & __mask_);} |
| _LIBCPP_INLINE_VISIBILITY bool operator ~() const _NOEXCEPT |
| {return !static_cast<bool>(*this);} |
| |
| _LIBCPP_INLINE_VISIBILITY |
| __bit_reference& operator=(bool __x) _NOEXCEPT |
| { |
| if (__x) |
| *__seg_ |= __mask_; |
| else |
| *__seg_ &= ~__mask_; |
| return *this; |
| } |
| |
| _LIBCPP_INLINE_VISIBILITY |
| __bit_reference& operator=(const __bit_reference& __x) _NOEXCEPT |
| {return operator=(static_cast<bool>(__x));} |
| |
| _LIBCPP_INLINE_VISIBILITY void flip() _NOEXCEPT {*__seg_ ^= __mask_;} |
| _LIBCPP_INLINE_VISIBILITY __bit_iterator<_Cp, false> operator&() const _NOEXCEPT |
| {return __bit_iterator<_Cp, false>(__seg_, static_cast<unsigned>(__libcpp_ctz(__mask_)));} |
| private: |
| _LIBCPP_INLINE_VISIBILITY |
| __bit_reference(__storage_pointer __s, __storage_type __m) _NOEXCEPT |
| : __seg_(__s), __mask_(__m) {} |
| }; |
| |
| template <class _Cp> |
| class __bit_reference<_Cp, false> |
| { |
| }; |
| |
| template <class _Cp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| void |
| swap(__bit_reference<_Cp> __x, __bit_reference<_Cp> __y) _NOEXCEPT |
| { |
| bool __t = __x; |
| __x = __y; |
| __y = __t; |
| } |
| |
| template <class _Cp, class _Dp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| void |
| swap(__bit_reference<_Cp> __x, __bit_reference<_Dp> __y) _NOEXCEPT |
| { |
| bool __t = __x; |
| __x = __y; |
| __y = __t; |
| } |
| |
| template <class _Cp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| void |
| swap(__bit_reference<_Cp> __x, bool& __y) _NOEXCEPT |
| { |
| bool __t = __x; |
| __x = __y; |
| __y = __t; |
| } |
| |
| template <class _Cp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| void |
| swap(bool& __x, __bit_reference<_Cp> __y) _NOEXCEPT |
| { |
| bool __t = __x; |
| __x = __y; |
| __y = __t; |
| } |
| |
| template <class _Cp> |
| class __bit_const_reference |
| { |
| typedef typename _Cp::__storage_type __storage_type; |
| typedef typename _Cp::__const_storage_pointer __storage_pointer; |
| |
| __storage_pointer __seg_; |
| __storage_type __mask_; |
| |
| friend typename _Cp::__self; |
| friend class __bit_iterator<_Cp, true>; |
| public: |
| _LIBCPP_INLINE_VISIBILITY |
| __bit_const_reference(const __bit_const_reference&) = default; |
| |
| _LIBCPP_INLINE_VISIBILITY |
| __bit_const_reference(const __bit_reference<_Cp>& __x) _NOEXCEPT |
| : __seg_(__x.__seg_), __mask_(__x.__mask_) {} |
| |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR operator bool() const _NOEXCEPT |
| {return static_cast<bool>(*__seg_ & __mask_);} |
| |
| _LIBCPP_INLINE_VISIBILITY __bit_iterator<_Cp, true> operator&() const _NOEXCEPT |
| {return __bit_iterator<_Cp, true>(__seg_, static_cast<unsigned>(__libcpp_ctz(__mask_)));} |
| private: |
| _LIBCPP_INLINE_VISIBILITY |
| _LIBCPP_CONSTEXPR |
| __bit_const_reference(__storage_pointer __s, __storage_type __m) _NOEXCEPT |
| : __seg_(__s), __mask_(__m) {} |
| |
| __bit_const_reference& operator=(const __bit_const_reference&) = delete; |
| }; |
| |
| // find |
| |
| template <class _Cp, bool _IsConst> |
| __bit_iterator<_Cp, _IsConst> |
| __find_bool_true(__bit_iterator<_Cp, _IsConst> __first, typename _Cp::size_type __n) |
| { |
| typedef __bit_iterator<_Cp, _IsConst> _It; |
| typedef typename _It::__storage_type __storage_type; |
| static const int __bits_per_word = _It::__bits_per_word; |
| // do first partial word |
| if (__first.__ctz_ != 0) |
| { |
| __storage_type __clz_f = static_cast<__storage_type>(__bits_per_word - __first.__ctz_); |
| __storage_type __dn = _VSTD::min(__clz_f, __n); |
| __storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn)); |
| __storage_type __b = *__first.__seg_ & __m; |
| if (__b) |
| return _It(__first.__seg_, static_cast<unsigned>(_VSTD::__libcpp_ctz(__b))); |
| if (__n == __dn) |
| return __first + __n; |
| __n -= __dn; |
| ++__first.__seg_; |
| } |
| // do middle whole words |
| for (; __n >= __bits_per_word; ++__first.__seg_, __n -= __bits_per_word) |
| if (*__first.__seg_) |
| return _It(__first.__seg_, static_cast<unsigned>(_VSTD::__libcpp_ctz(*__first.__seg_))); |
| // do last partial word |
| if (__n > 0) |
| { |
| __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n); |
| __storage_type __b = *__first.__seg_ & __m; |
| if (__b) |
| return _It(__first.__seg_, static_cast<unsigned>(_VSTD::__libcpp_ctz(__b))); |
| } |
| return _It(__first.__seg_, static_cast<unsigned>(__n)); |
| } |
| |
| template <class _Cp, bool _IsConst> |
| __bit_iterator<_Cp, _IsConst> |
| __find_bool_false(__bit_iterator<_Cp, _IsConst> __first, typename _Cp::size_type __n) |
| { |
| typedef __bit_iterator<_Cp, _IsConst> _It; |
| typedef typename _It::__storage_type __storage_type; |
| const int __bits_per_word = _It::__bits_per_word; |
| // do first partial word |
| if (__first.__ctz_ != 0) |
| { |
| __storage_type __clz_f = static_cast<__storage_type>(__bits_per_word - __first.__ctz_); |
| __storage_type __dn = _VSTD::min(__clz_f, __n); |
| __storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn)); |
| __storage_type __b = ~*__first.__seg_ & __m; |
| if (__b) |
| return _It(__first.__seg_, static_cast<unsigned>(_VSTD::__libcpp_ctz(__b))); |
| if (__n == __dn) |
| return __first + __n; |
| __n -= __dn; |
| ++__first.__seg_; |
| } |
| // do middle whole words |
| for (; __n >= __bits_per_word; ++__first.__seg_, __n -= __bits_per_word) |
| { |
| __storage_type __b = ~*__first.__seg_; |
| if (__b) |
| return _It(__first.__seg_, static_cast<unsigned>(_VSTD::__libcpp_ctz(__b))); |
| } |
| // do last partial word |
| if (__n > 0) |
| { |
| __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n); |
| __storage_type __b = ~*__first.__seg_ & __m; |
| if (__b) |
| return _It(__first.__seg_, static_cast<unsigned>(_VSTD::__libcpp_ctz(__b))); |
| } |
| return _It(__first.__seg_, static_cast<unsigned>(__n)); |
| } |
| |
| template <class _Cp, bool _IsConst, class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| __bit_iterator<_Cp, _IsConst> |
| find(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, const _Tp& __value_) |
| { |
| if (static_cast<bool>(__value_)) |
| return _VSTD::__find_bool_true(__first, static_cast<typename _Cp::size_type>(__last - __first)); |
| return _VSTD::__find_bool_false(__first, static_cast<typename _Cp::size_type>(__last - __first)); |
| } |
| |
| // count |
| |
| template <class _Cp, bool _IsConst> |
| typename __bit_iterator<_Cp, _IsConst>::difference_type |
| __count_bool_true(__bit_iterator<_Cp, _IsConst> __first, typename _Cp::size_type __n) |
| { |
| typedef __bit_iterator<_Cp, _IsConst> _It; |
| typedef typename _It::__storage_type __storage_type; |
| typedef typename _It::difference_type difference_type; |
| const int __bits_per_word = _It::__bits_per_word; |
| difference_type __r = 0; |
| // do first partial word |
| if (__first.__ctz_ != 0) |
| { |
| __storage_type __clz_f = static_cast<__storage_type>(__bits_per_word - __first.__ctz_); |
| __storage_type __dn = _VSTD::min(__clz_f, __n); |
| __storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn)); |
| __r = _VSTD::__libcpp_popcount(*__first.__seg_ & __m); |
| __n -= __dn; |
| ++__first.__seg_; |
| } |
| // do middle whole words |
| for (; __n >= __bits_per_word; ++__first.__seg_, __n -= __bits_per_word) |
| __r += _VSTD::__libcpp_popcount(*__first.__seg_); |
| // do last partial word |
| if (__n > 0) |
| { |
| __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n); |
| __r += _VSTD::__libcpp_popcount(*__first.__seg_ & __m); |
| } |
| return __r; |
| } |
| |
| template <class _Cp, bool _IsConst> |
| typename __bit_iterator<_Cp, _IsConst>::difference_type |
| __count_bool_false(__bit_iterator<_Cp, _IsConst> __first, typename _Cp::size_type __n) |
| { |
| typedef __bit_iterator<_Cp, _IsConst> _It; |
| typedef typename _It::__storage_type __storage_type; |
| typedef typename _It::difference_type difference_type; |
| const int __bits_per_word = _It::__bits_per_word; |
| difference_type __r = 0; |
| // do first partial word |
| if (__first.__ctz_ != 0) |
| { |
| __storage_type __clz_f = static_cast<__storage_type>(__bits_per_word - __first.__ctz_); |
| __storage_type __dn = _VSTD::min(__clz_f, __n); |
| __storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn)); |
| __r = _VSTD::__libcpp_popcount(~*__first.__seg_ & __m); |
| __n -= __dn; |
| ++__first.__seg_; |
| } |
| // do middle whole words |
| for (; __n >= __bits_per_word; ++__first.__seg_, __n -= __bits_per_word) |
| __r += _VSTD::__libcpp_popcount(~*__first.__seg_); |
| // do last partial word |
| if (__n > 0) |
| { |
| __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n); |
| __r += _VSTD::__libcpp_popcount(~*__first.__seg_ & __m); |
| } |
| return __r; |
| } |
| |
| template <class _Cp, bool _IsConst, class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| typename __bit_iterator<_Cp, _IsConst>::difference_type |
| count(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, const _Tp& __value_) |
| { |
| if (static_cast<bool>(__value_)) |
| return _VSTD::__count_bool_true(__first, static_cast<typename _Cp::size_type>(__last - __first)); |
| return _VSTD::__count_bool_false(__first, static_cast<typename _Cp::size_type>(__last - __first)); |
| } |
| |
| // fill_n |
| |
| template <class _Cp> |
| void |
| __fill_n_false(__bit_iterator<_Cp, false> __first, typename _Cp::size_type __n) |
| { |
| typedef __bit_iterator<_Cp, false> _It; |
| typedef typename _It::__storage_type __storage_type; |
| const int __bits_per_word = _It::__bits_per_word; |
| // do first partial word |
| if (__first.__ctz_ != 0) |
| { |
| __storage_type __clz_f = static_cast<__storage_type>(__bits_per_word - __first.__ctz_); |
| __storage_type __dn = _VSTD::min(__clz_f, __n); |
| __storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn)); |
| *__first.__seg_ &= ~__m; |
| __n -= __dn; |
| ++__first.__seg_; |
| } |
| // do middle whole words |
| __storage_type __nw = __n / __bits_per_word; |
| _VSTD::memset(_VSTD::__to_address(__first.__seg_), 0, __nw * sizeof(__storage_type)); |
| __n -= __nw * __bits_per_word; |
| // do last partial word |
| if (__n > 0) |
| { |
| __first.__seg_ += __nw; |
| __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n); |
| *__first.__seg_ &= ~__m; |
| } |
| } |
| |
| template <class _Cp> |
| void |
| __fill_n_true(__bit_iterator<_Cp, false> __first, typename _Cp::size_type __n) |
| { |
| typedef __bit_iterator<_Cp, false> _It; |
| typedef typename _It::__storage_type __storage_type; |
| const int __bits_per_word = _It::__bits_per_word; |
| // do first partial word |
| if (__first.__ctz_ != 0) |
| { |
| __storage_type __clz_f = static_cast<__storage_type>(__bits_per_word - __first.__ctz_); |
| __storage_type __dn = _VSTD::min(__clz_f, __n); |
| __storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn)); |
| *__first.__seg_ |= __m; |
| __n -= __dn; |
| ++__first.__seg_; |
| } |
| // do middle whole words |
| __storage_type __nw = __n / __bits_per_word; |
| _VSTD::memset(_VSTD::__to_address(__first.__seg_), -1, __nw * sizeof(__storage_type)); |
| __n -= __nw * __bits_per_word; |
| // do last partial word |
| if (__n > 0) |
| { |
| __first.__seg_ += __nw; |
| __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n); |
| *__first.__seg_ |= __m; |
| } |
| } |
| |
| template <class _Cp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| void |
| fill_n(__bit_iterator<_Cp, false> __first, typename _Cp::size_type __n, bool __value_) |
| { |
| if (__n > 0) |
| { |
| if (__value_) |
| _VSTD::__fill_n_true(__first, __n); |
| else |
| _VSTD::__fill_n_false(__first, __n); |
| } |
| } |
| |
| // fill |
| |
| template <class _Cp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| void |
| fill(__bit_iterator<_Cp, false> __first, __bit_iterator<_Cp, false> __last, bool __value_) |
| { |
| _VSTD::fill_n(__first, static_cast<typename _Cp::size_type>(__last - __first), __value_); |
| } |
| |
| // copy |
| |
| template <class _Cp, bool _IsConst> |
| __bit_iterator<_Cp, false> |
| __copy_aligned(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, |
| __bit_iterator<_Cp, false> __result) |
| { |
| typedef __bit_iterator<_Cp, _IsConst> _In; |
| typedef typename _In::difference_type difference_type; |
| typedef typename _In::__storage_type __storage_type; |
| const int __bits_per_word = _In::__bits_per_word; |
| difference_type __n = __last - __first; |
| if (__n > 0) |
| { |
| // do first word |
| if (__first.__ctz_ != 0) |
| { |
| unsigned __clz = __bits_per_word - __first.__ctz_; |
| difference_type __dn = _VSTD::min(static_cast<difference_type>(__clz), __n); |
| __n -= __dn; |
| __storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz - __dn)); |
| __storage_type __b = *__first.__seg_ & __m; |
| *__result.__seg_ &= ~__m; |
| *__result.__seg_ |= __b; |
| __result.__seg_ += (__dn + __result.__ctz_) / __bits_per_word; |
| __result.__ctz_ = static_cast<unsigned>((__dn + __result.__ctz_) % __bits_per_word); |
| ++__first.__seg_; |
| // __first.__ctz_ = 0; |
| } |
| // __first.__ctz_ == 0; |
| // do middle words |
| __storage_type __nw = __n / __bits_per_word; |
| _VSTD::memmove(_VSTD::__to_address(__result.__seg_), |
| _VSTD::__to_address(__first.__seg_), |
| __nw * sizeof(__storage_type)); |
| __n -= __nw * __bits_per_word; |
| __result.__seg_ += __nw; |
| // do last word |
| if (__n > 0) |
| { |
| __first.__seg_ += __nw; |
| __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n); |
| __storage_type __b = *__first.__seg_ & __m; |
| *__result.__seg_ &= ~__m; |
| *__result.__seg_ |= __b; |
| __result.__ctz_ = static_cast<unsigned>(__n); |
| } |
| } |
| return __result; |
| } |
| |
| template <class _Cp, bool _IsConst> |
| __bit_iterator<_Cp, false> |
| __copy_unaligned(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, |
| __bit_iterator<_Cp, false> __result) |
| { |
| typedef __bit_iterator<_Cp, _IsConst> _In; |
| typedef typename _In::difference_type difference_type; |
| typedef typename _In::__storage_type __storage_type; |
| static const int __bits_per_word = _In::__bits_per_word; |
| difference_type __n = __last - __first; |
| if (__n > 0) |
| { |
| // do first word |
| if (__first.__ctz_ != 0) |
| { |
| unsigned __clz_f = __bits_per_word - __first.__ctz_; |
| difference_type __dn = _VSTD::min(static_cast<difference_type>(__clz_f), __n); |
| __n -= __dn; |
| __storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn)); |
| __storage_type __b = *__first.__seg_ & __m; |
| unsigned __clz_r = __bits_per_word - __result.__ctz_; |
| __storage_type __ddn = _VSTD::min<__storage_type>(__dn, __clz_r); |
| __m = (~__storage_type(0) << __result.__ctz_) & (~__storage_type(0) >> (__clz_r - __ddn)); |
| *__result.__seg_ &= ~__m; |
| if (__result.__ctz_ > __first.__ctz_) |
| *__result.__seg_ |= __b << (__result.__ctz_ - __first.__ctz_); |
| else |
| *__result.__seg_ |= __b >> (__first.__ctz_ - __result.__ctz_); |
| __result.__seg_ += (__ddn + __result.__ctz_) / __bits_per_word; |
| __result.__ctz_ = static_cast<unsigned>((__ddn + __result.__ctz_) % __bits_per_word); |
| __dn -= __ddn; |
| if (__dn > 0) |
| { |
| __m = ~__storage_type(0) >> (__bits_per_word - __dn); |
| *__result.__seg_ &= ~__m; |
| *__result.__seg_ |= __b >> (__first.__ctz_ + __ddn); |
| __result.__ctz_ = static_cast<unsigned>(__dn); |
| } |
| ++__first.__seg_; |
| // __first.__ctz_ = 0; |
| } |
| // __first.__ctz_ == 0; |
| // do middle words |
| unsigned __clz_r = __bits_per_word - __result.__ctz_; |
| __storage_type __m = ~__storage_type(0) << __result.__ctz_; |
| for (; __n >= __bits_per_word; __n -= __bits_per_word, ++__first.__seg_) |
| { |
| __storage_type __b = *__first.__seg_; |
| *__result.__seg_ &= ~__m; |
| *__result.__seg_ |= __b << __result.__ctz_; |
| ++__result.__seg_; |
| *__result.__seg_ &= __m; |
| *__result.__seg_ |= __b >> __clz_r; |
| } |
| // do last word |
| if (__n > 0) |
| { |
| __m = ~__storage_type(0) >> (__bits_per_word - __n); |
| __storage_type __b = *__first.__seg_ & __m; |
| __storage_type __dn = _VSTD::min(__n, static_cast<difference_type>(__clz_r)); |
| __m = (~__storage_type(0) << __result.__ctz_) & (~__storage_type(0) >> (__clz_r - __dn)); |
| *__result.__seg_ &= ~__m; |
| *__result.__seg_ |= __b << __result.__ctz_; |
| __result.__seg_ += (__dn + __result.__ctz_) / __bits_per_word; |
| __result.__ctz_ = static_cast<unsigned>((__dn + __result.__ctz_) % __bits_per_word); |
| __n -= __dn; |
| if (__n > 0) |
| { |
| __m = ~__storage_type(0) >> (__bits_per_word - __n); |
| *__result.__seg_ &= ~__m; |
| *__result.__seg_ |= __b >> __dn; |
| __result.__ctz_ = static_cast<unsigned>(__n); |
| } |
| } |
| } |
| return __result; |
| } |
| |
| template <class _Cp, bool _IsConst> |
| inline _LIBCPP_INLINE_VISIBILITY |
| __bit_iterator<_Cp, false> |
| copy(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result) |
| { |
| if (__first.__ctz_ == __result.__ctz_) |
| return _VSTD::__copy_aligned(__first, __last, __result); |
| return _VSTD::__copy_unaligned(__first, __last, __result); |
| } |
| |
| // copy_backward |
| |
| template <class _Cp, bool _IsConst> |
| __bit_iterator<_Cp, false> |
| __copy_backward_aligned(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, |
| __bit_iterator<_Cp, false> __result) |
| { |
| typedef __bit_iterator<_Cp, _IsConst> _In; |
| typedef typename _In::difference_type difference_type; |
| typedef typename _In::__storage_type __storage_type; |
| const int __bits_per_word = _In::__bits_per_word; |
| difference_type __n = __last - __first; |
| if (__n > 0) |
| { |
| // do first word |
| if (__last.__ctz_ != 0) |
| { |
| difference_type __dn = _VSTD::min(static_cast<difference_type>(__last.__ctz_), __n); |
| __n -= __dn; |
| unsigned __clz = __bits_per_word - __last.__ctz_; |
| __storage_type __m = (~__storage_type(0) << (__last.__ctz_ - __dn)) & (~__storage_type(0) >> __clz); |
| __storage_type __b = *__last.__seg_ & __m; |
| *__result.__seg_ &= ~__m; |
| *__result.__seg_ |= __b; |
| __result.__ctz_ = static_cast<unsigned>(((-__dn & (__bits_per_word - 1)) + |
| __result.__ctz_) % __bits_per_word); |
| // __last.__ctz_ = 0 |
| } |
| // __last.__ctz_ == 0 || __n == 0 |
| // __result.__ctz_ == 0 || __n == 0 |
| // do middle words |
| __storage_type __nw = __n / __bits_per_word; |
| __result.__seg_ -= __nw; |
| __last.__seg_ -= __nw; |
| _VSTD::memmove(_VSTD::__to_address(__result.__seg_), |
| _VSTD::__to_address(__last.__seg_), |
| __nw * sizeof(__storage_type)); |
| __n -= __nw * __bits_per_word; |
| // do last word |
| if (__n > 0) |
| { |
| __storage_type __m = ~__storage_type(0) << (__bits_per_word - __n); |
| __storage_type __b = *--__last.__seg_ & __m; |
| *--__result.__seg_ &= ~__m; |
| *__result.__seg_ |= __b; |
| __result.__ctz_ = static_cast<unsigned>(-__n & (__bits_per_word - 1)); |
| } |
| } |
| return __result; |
| } |
| |
| template <class _Cp, bool _IsConst> |
| __bit_iterator<_Cp, false> |
| __copy_backward_unaligned(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, |
| __bit_iterator<_Cp, false> __result) |
| { |
| typedef __bit_iterator<_Cp, _IsConst> _In; |
| typedef typename _In::difference_type difference_type; |
| typedef typename _In::__storage_type __storage_type; |
| const int __bits_per_word = _In::__bits_per_word; |
| difference_type __n = __last - __first; |
| if (__n > 0) |
| { |
| // do first word |
| if (__last.__ctz_ != 0) |
| { |
| difference_type __dn = _VSTD::min(static_cast<difference_type>(__last.__ctz_), __n); |
| __n -= __dn; |
| unsigned __clz_l = __bits_per_word - __last.__ctz_; |
| __storage_type __m = (~__storage_type(0) << (__last.__ctz_ - __dn)) & (~__storage_type(0) >> __clz_l); |
| __storage_type __b = *__last.__seg_ & __m; |
| unsigned __clz_r = __bits_per_word - __result.__ctz_; |
| __storage_type __ddn = _VSTD::min(__dn, static_cast<difference_type>(__result.__ctz_)); |
| if (__ddn > 0) |
| { |
| __m = (~__storage_type(0) << (__result.__ctz_ - __ddn)) & (~__storage_type(0) >> __clz_r); |
| *__result.__seg_ &= ~__m; |
| if (__result.__ctz_ > __last.__ctz_) |
| *__result.__seg_ |= __b << (__result.__ctz_ - __last.__ctz_); |
| else |
| *__result.__seg_ |= __b >> (__last.__ctz_ - __result.__ctz_); |
| __result.__ctz_ = static_cast<unsigned>(((-__ddn & (__bits_per_word - 1)) + |
| __result.__ctz_) % __bits_per_word); |
| __dn -= __ddn; |
| } |
| if (__dn > 0) |
| { |
| // __result.__ctz_ == 0 |
| --__result.__seg_; |
| __result.__ctz_ = static_cast<unsigned>(-__dn & (__bits_per_word - 1)); |
| __m = ~__storage_type(0) << __result.__ctz_; |
| *__result.__seg_ &= ~__m; |
| __last.__ctz_ -= __dn + __ddn; |
| *__result.__seg_ |= __b << (__result.__ctz_ - __last.__ctz_); |
| } |
| // __last.__ctz_ = 0 |
| } |
| // __last.__ctz_ == 0 || __n == 0 |
| // __result.__ctz_ != 0 || __n == 0 |
| // do middle words |
| unsigned __clz_r = __bits_per_word - __result.__ctz_; |
| __storage_type __m = ~__storage_type(0) >> __clz_r; |
| for (; __n >= __bits_per_word; __n -= __bits_per_word) |
| { |
| __storage_type __b = *--__last.__seg_; |
| *__result.__seg_ &= ~__m; |
| *__result.__seg_ |= __b >> __clz_r; |
| *--__result.__seg_ &= __m; |
| *__result.__seg_ |= __b << __result.__ctz_; |
| } |
| // do last word |
| if (__n > 0) |
| { |
| __m = ~__storage_type(0) << (__bits_per_word - __n); |
| __storage_type __b = *--__last.__seg_ & __m; |
| __clz_r = __bits_per_word - __result.__ctz_; |
| __storage_type __dn = _VSTD::min(__n, static_cast<difference_type>(__result.__ctz_)); |
| __m = (~__storage_type(0) << (__result.__ctz_ - __dn)) & (~__storage_type(0) >> __clz_r); |
| *__result.__seg_ &= ~__m; |
| *__result.__seg_ |= __b >> (__bits_per_word - __result.__ctz_); |
| __result.__ctz_ = static_cast<unsigned>(((-__dn & (__bits_per_word - 1)) + |
| __result.__ctz_) % __bits_per_word); |
| __n -= __dn; |
| if (__n > 0) |
| { |
| // __result.__ctz_ == 0 |
| --__result.__seg_; |
| __result.__ctz_ = static_cast<unsigned>(-__n & (__bits_per_word - 1)); |
| __m = ~__storage_type(0) << __result.__ctz_; |
| *__result.__seg_ &= ~__m; |
| *__result.__seg_ |= __b << (__result.__ctz_ - (__bits_per_word - __n - __dn)); |
| } |
| } |
| } |
| return __result; |
| } |
| |
| template <class _Cp, bool _IsConst> |
| inline _LIBCPP_INLINE_VISIBILITY |
| __bit_iterator<_Cp, false> |
| copy_backward(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result) |
| { |
| if (__last.__ctz_ == __result.__ctz_) |
| return _VSTD::__copy_backward_aligned(__first, __last, __result); |
| return _VSTD::__copy_backward_unaligned(__first, __last, __result); |
| } |
| |
| // move |
| |
| template <class _Cp, bool _IsConst> |
| inline _LIBCPP_INLINE_VISIBILITY |
| __bit_iterator<_Cp, false> |
| move(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result) |
| { |
| return _VSTD::copy(__first, __last, __result); |
| } |
| |
| // move_backward |
| |
| template <class _Cp, bool _IsConst> |
| inline _LIBCPP_INLINE_VISIBILITY |
| __bit_iterator<_Cp, false> |
| move_backward(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result) |
| { |
| return _VSTD::copy_backward(__first, __last, __result); |
| } |
| |
| // swap_ranges |
| |
| template <class __C1, class __C2> |
| __bit_iterator<__C2, false> |
| __swap_ranges_aligned(__bit_iterator<__C1, false> __first, __bit_iterator<__C1, false> __last, |
| __bit_iterator<__C2, false> __result) |
| { |
| typedef __bit_iterator<__C1, false> _I1; |
| typedef typename _I1::difference_type difference_type; |
| typedef typename _I1::__storage_type __storage_type; |
| const int __bits_per_word = _I1::__bits_per_word; |
| difference_type __n = __last - __first; |
| if (__n > 0) |
| { |
| // do first word |
| if (__first.__ctz_ != 0) |
| { |
| unsigned __clz = __bits_per_word - __first.__ctz_; |
| difference_type __dn = _VSTD::min(static_cast<difference_type>(__clz), __n); |
| __n -= __dn; |
| __storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz - __dn)); |
| __storage_type __b1 = *__first.__seg_ & __m; |
| *__first.__seg_ &= ~__m; |
| __storage_type __b2 = *__result.__seg_ & __m; |
| *__result.__seg_ &= ~__m; |
| *__result.__seg_ |= __b1; |
| *__first.__seg_ |= __b2; |
| __result.__seg_ += (__dn + __result.__ctz_) / __bits_per_word; |
| __result.__ctz_ = static_cast<unsigned>((__dn + __result.__ctz_) % __bits_per_word); |
| ++__first.__seg_; |
| // __first.__ctz_ = 0; |
| } |
| // __first.__ctz_ == 0; |
| // do middle words |
| for (; __n >= __bits_per_word; __n -= __bits_per_word, ++__first.__seg_, ++__result.__seg_) |
| swap(*__first.__seg_, *__result.__seg_); |
| // do last word |
| if (__n > 0) |
| { |
| __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n); |
| __storage_type __b1 = *__first.__seg_ & __m; |
| *__first.__seg_ &= ~__m; |
| __storage_type __b2 = *__result.__seg_ & __m; |
| *__result.__seg_ &= ~__m; |
| *__result.__seg_ |= __b1; |
| *__first.__seg_ |= __b2; |
| __result.__ctz_ = static_cast<unsigned>(__n); |
| } |
| } |
| return __result; |
| } |
| |
| template <class __C1, class __C2> |
| __bit_iterator<__C2, false> |
| __swap_ranges_unaligned(__bit_iterator<__C1, false> __first, __bit_iterator<__C1, false> __last, |
| __bit_iterator<__C2, false> __result) |
| { |
| typedef __bit_iterator<__C1, false> _I1; |
| typedef typename _I1::difference_type difference_type; |
| typedef typename _I1::__storage_type __storage_type; |
| const int __bits_per_word = _I1::__bits_per_word; |
| difference_type __n = __last - __first; |
| if (__n > 0) |
| { |
| // do first word |
| if (__first.__ctz_ != 0) |
| { |
| unsigned __clz_f = __bits_per_word - __first.__ctz_; |
| difference_type __dn = _VSTD::min(static_cast<difference_type>(__clz_f), __n); |
| __n -= __dn; |
| __storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn)); |
| __storage_type __b1 = *__first.__seg_ & __m; |
| *__first.__seg_ &= ~__m; |
| unsigned __clz_r = __bits_per_word - __result.__ctz_; |
| __storage_type __ddn = _VSTD::min<__storage_type>(__dn, __clz_r); |
| __m = (~__storage_type(0) << __result.__ctz_) & (~__storage_type(0) >> (__clz_r - __ddn)); |
| __storage_type __b2 = *__result.__seg_ & __m; |
| *__result.__seg_ &= ~__m; |
| if (__result.__ctz_ > __first.__ctz_) |
| { |
| unsigned __s = __result.__ctz_ - __first.__ctz_; |
| *__result.__seg_ |= __b1 << __s; |
| *__first.__seg_ |= __b2 >> __s; |
| } |
| else |
| { |
| unsigned __s = __first.__ctz_ - __result.__ctz_; |
| *__result.__seg_ |= __b1 >> __s; |
| *__first.__seg_ |= __b2 << __s; |
| } |
| __result.__seg_ += (__ddn + __result.__ctz_) / __bits_per_word; |
| __result.__ctz_ = static_cast<unsigned>((__ddn + __result.__ctz_) % __bits_per_word); |
| __dn -= __ddn; |
| if (__dn > 0) |
| { |
| __m = ~__storage_type(0) >> (__bits_per_word - __dn); |
| __b2 = *__result.__seg_ & __m; |
| *__result.__seg_ &= ~__m; |
| unsigned __s = __first.__ctz_ + __ddn; |
| *__result.__seg_ |= __b1 >> __s; |
| *__first.__seg_ |= __b2 << __s; |
| __result.__ctz_ = static_cast<unsigned>(__dn); |
| } |
| ++__first.__seg_; |
| // __first.__ctz_ = 0; |
| } |
| // __first.__ctz_ == 0; |
| // do middle words |
| __storage_type __m = ~__storage_type(0) << __result.__ctz_; |
| unsigned __clz_r = __bits_per_word - __result.__ctz_; |
| for (; __n >= __bits_per_word; __n -= __bits_per_word, ++__first.__seg_) |
| { |
| __storage_type __b1 = *__first.__seg_; |
| __storage_type __b2 = *__result.__seg_ & __m; |
| *__result.__seg_ &= ~__m; |
| *__result.__seg_ |= __b1 << __result.__ctz_; |
| *__first.__seg_ = __b2 >> __result.__ctz_; |
| ++__result.__seg_; |
| __b2 = *__result.__seg_ & ~__m; |
| *__result.__seg_ &= __m; |
| *__result.__seg_ |= __b1 >> __clz_r; |
| *__first.__seg_ |= __b2 << __clz_r; |
| } |
| // do last word |
| if (__n > 0) |
| { |
| __m = ~__storage_type(0) >> (__bits_per_word - __n); |
| __storage_type __b1 = *__first.__seg_ & __m; |
| *__first.__seg_ &= ~__m; |
| __storage_type __dn = _VSTD::min<__storage_type>(__n, __clz_r); |
| __m = (~__storage_type(0) << __result.__ctz_) & (~__storage_type(0) >> (__clz_r - __dn)); |
| __storage_type __b2 = *__result.__seg_ & __m; |
| *__result.__seg_ &= ~__m; |
| *__result.__seg_ |= __b1 << __result.__ctz_; |
| *__first.__seg_ |= __b2 >> __result.__ctz_; |
| __result.__seg_ += (__dn + __result.__ctz_) / __bits_per_word; |
| __result.__ctz_ = static_cast<unsigned>((__dn + __result.__ctz_) % __bits_per_word); |
| __n -= __dn; |
| if (__n > 0) |
| { |
| __m = ~__storage_type(0) >> (__bits_per_word - __n); |
| __b2 = *__result.__seg_ & __m; |
| *__result.__seg_ &= ~__m; |
| *__result.__seg_ |= __b1 >> __dn; |
| *__first.__seg_ |= __b2 << __dn; |
| __result.__ctz_ = static_cast<unsigned>(__n); |
| } |
| } |
| } |
| return __result; |
| } |
| |
| template <class __C1, class __C2> |
| inline _LIBCPP_INLINE_VISIBILITY |
| __bit_iterator<__C2, false> |
| swap_ranges(__bit_iterator<__C1, false> __first1, __bit_iterator<__C1, false> __last1, |
| __bit_iterator<__C2, false> __first2) |
| { |
| if (__first1.__ctz_ == __first2.__ctz_) |
| return _VSTD::__swap_ranges_aligned(__first1, __last1, __first2); |
| return _VSTD::__swap_ranges_unaligned(__first1, __last1, __first2); |
| } |
| |
| // rotate |
| |
| template <class _Cp> |
| struct __bit_array |
| { |
| typedef typename _Cp::difference_type difference_type; |
| typedef typename _Cp::__storage_type __storage_type; |
| typedef typename _Cp::__storage_pointer __storage_pointer; |
| typedef typename _Cp::iterator iterator; |
| static const unsigned __bits_per_word = _Cp::__bits_per_word; |
| static const unsigned _Np = 4; |
| |
| difference_type __size_; |
| __storage_type __word_[_Np]; |
| |
| _LIBCPP_INLINE_VISIBILITY static difference_type capacity() |
| {return static_cast<difference_type>(_Np * __bits_per_word);} |
| _LIBCPP_INLINE_VISIBILITY explicit __bit_array(difference_type __s) : __size_(__s) {} |
| _LIBCPP_INLINE_VISIBILITY iterator begin() |
| { |
| return iterator(pointer_traits<__storage_pointer>::pointer_to(__word_[0]), 0); |
| } |
| _LIBCPP_INLINE_VISIBILITY iterator end() |
| { |
| return iterator(pointer_traits<__storage_pointer>::pointer_to(__word_[0]) + __size_ / __bits_per_word, |
| static_cast<unsigned>(__size_ % __bits_per_word)); |
| } |
| }; |
| |
| template <class _Cp> |
| __bit_iterator<_Cp, false> |
| rotate(__bit_iterator<_Cp, false> __first, __bit_iterator<_Cp, false> __middle, __bit_iterator<_Cp, false> __last) |
| { |
| typedef __bit_iterator<_Cp, false> _I1; |
| typedef typename _I1::difference_type difference_type; |
| difference_type __d1 = __middle - __first; |
| difference_type __d2 = __last - __middle; |
| _I1 __r = __first + __d2; |
| while (__d1 != 0 && __d2 != 0) |
| { |
| if (__d1 <= __d2) |
| { |
| if (__d1 <= __bit_array<_Cp>::capacity()) |
| { |
| __bit_array<_Cp> __b(__d1); |
| _VSTD::copy(__first, __middle, __b.begin()); |
| _VSTD::copy(__b.begin(), __b.end(), _VSTD::copy(__middle, __last, __first)); |
| break; |
| } |
| else |
| { |
| __bit_iterator<_Cp, false> __mp = _VSTD::swap_ranges(__first, __middle, __middle); |
| __first = __middle; |
| __middle = __mp; |
| __d2 -= __d1; |
| } |
| } |
| else |
| { |
| if (__d2 <= __bit_array<_Cp>::capacity()) |
| { |
| __bit_array<_Cp> __b(__d2); |
| _VSTD::copy(__middle, __last, __b.begin()); |
| _VSTD::copy_backward(__b.begin(), __b.end(), _VSTD::copy_backward(__first, __middle, __last)); |
| break; |
| } |
| else |
| { |
| __bit_iterator<_Cp, false> __mp = __first + __d2; |
| _VSTD::swap_ranges(__first, __mp, __middle); |
| __first = __mp; |
| __d1 -= __d2; |
| } |
| } |
| } |
| return __r; |
| } |
| |
| // equal |
| |
| template <class _Cp, bool _IC1, bool _IC2> |
| bool |
| __equal_unaligned(__bit_iterator<_Cp, _IC1> __first1, __bit_iterator<_Cp, _IC1> __last1, |
| __bit_iterator<_Cp, _IC2> __first2) |
| { |
| typedef __bit_iterator<_Cp, _IC1> _It; |
| typedef typename _It::difference_type difference_type; |
| typedef typename _It::__storage_type __storage_type; |
| static const int __bits_per_word = _It::__bits_per_word; |
| difference_type __n = __last1 - __first1; |
| if (__n > 0) |
| { |
| // do first word |
| if (__first1.__ctz_ != 0) |
| { |
| unsigned __clz_f = __bits_per_word - __first1.__ctz_; |
| difference_type __dn = _VSTD::min(static_cast<difference_type>(__clz_f), __n); |
| __n -= __dn; |
| __storage_type __m = (~__storage_type(0) << __first1.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn)); |
| __storage_type __b = *__first1.__seg_ & __m; |
| unsigned __clz_r = __bits_per_word - __first2.__ctz_; |
| __storage_type __ddn = _VSTD::min<__storage_type>(__dn, __clz_r); |
| __m = (~__storage_type(0) << __first2.__ctz_) & (~__storage_type(0) >> (__clz_r - __ddn)); |
| if (__first2.__ctz_ > __first1.__ctz_) |
| { |
| if ((*__first2.__seg_ & __m) != (__b << (__first2.__ctz_ - __first1.__ctz_))) |
| return false; |
| } |
| else |
| { |
| if ((*__first2.__seg_ & __m) != (__b >> (__first1.__ctz_ - __first2.__ctz_))) |
| return false; |
| } |
| __first2.__seg_ += (__ddn + __first2.__ctz_) / __bits_per_word; |
| __first2.__ctz_ = static_cast<unsigned>((__ddn + __first2.__ctz_) % __bits_per_word); |
| __dn -= __ddn; |
| if (__dn > 0) |
| { |
| __m = ~__storage_type(0) >> (__bits_per_word - __dn); |
| if ((*__first2.__seg_ & __m) != (__b >> (__first1.__ctz_ + __ddn))) |
| return false; |
| __first2.__ctz_ = static_cast<unsigned>(__dn); |
| } |
| ++__first1.__seg_; |
| // __first1.__ctz_ = 0; |
| } |
| // __first1.__ctz_ == 0; |
| // do middle words |
| unsigned __clz_r = __bits_per_word - __first2.__ctz_; |
| __storage_type __m = ~__storage_type(0) << __first2.__ctz_; |
| for (; __n >= __bits_per_word; __n -= __bits_per_word, ++__first1.__seg_) |
| { |
| __storage_type __b = *__first1.__seg_; |
| if ((*__first2.__seg_ & __m) != (__b << __first2.__ctz_)) |
| return false; |
| ++__first2.__seg_; |
| if ((*__first2.__seg_ & ~__m) != (__b >> __clz_r)) |
| return false; |
| } |
| // do last word |
| if (__n > 0) |
| { |
| __m = ~__storage_type(0) >> (__bits_per_word - __n); |
| __storage_type __b = *__first1.__seg_ & __m; |
| __storage_type __dn = _VSTD::min(__n, static_cast<difference_type>(__clz_r)); |
| __m = (~__storage_type(0) << __first2.__ctz_) & (~__storage_type(0) >> (__clz_r - __dn)); |
| if ((*__first2.__seg_ & __m) != (__b << __first2.__ctz_)) |
| return false; |
| __first2.__seg_ += (__dn + __first2.__ctz_) / __bits_per_word; |
| __first2.__ctz_ = static_cast<unsigned>((__dn + __first2.__ctz_) % __bits_per_word); |
| __n -= __dn; |
| if (__n > 0) |
| { |
| __m = ~__storage_type(0) >> (__bits_per_word - __n); |
| if ((*__first2.__seg_ & __m) != (__b >> __dn)) |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| |
| template <class _Cp, bool _IC1, bool _IC2> |
| bool |
| __equal_aligned(__bit_iterator<_Cp, _IC1> __first1, __bit_iterator<_Cp, _IC1> __last1, |
| __bit_iterator<_Cp, _IC2> __first2) |
| { |
| typedef __bit_iterator<_Cp, _IC1> _It; |
| typedef typename _It::difference_type difference_type; |
| typedef typename _It::__storage_type __storage_type; |
| static const int __bits_per_word = _It::__bits_per_word; |
| difference_type __n = __last1 - __first1; |
| if (__n > 0) |
| { |
| // do first word |
| if (__first1.__ctz_ != 0) |
| { |
| unsigned __clz = __bits_per_word - __first1.__ctz_; |
| difference_type __dn = _VSTD::min(static_cast<difference_type>(__clz), __n); |
| __n -= __dn; |
| __storage_type __m = (~__storage_type(0) << __first1.__ctz_) & (~__storage_type(0) >> (__clz - __dn)); |
| if ((*__first2.__seg_ & __m) != (*__first1.__seg_ & __m)) |
| return false; |
| ++__first2.__seg_; |
| ++__first1.__seg_; |
| // __first1.__ctz_ = 0; |
| // __first2.__ctz_ = 0; |
| } |
| // __first1.__ctz_ == 0; |
| // __first2.__ctz_ == 0; |
| // do middle words |
| for (; __n >= __bits_per_word; __n -= __bits_per_word, ++__first1.__seg_, ++__first2.__seg_) |
| if (*__first2.__seg_ != *__first1.__seg_) |
| return false; |
| // do last word |
| if (__n > 0) |
| { |
| __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n); |
| if ((*__first2.__seg_ & __m) != (*__first1.__seg_ & __m)) |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| template <class _Cp, bool _IC1, bool _IC2> |
| inline _LIBCPP_INLINE_VISIBILITY |
| bool |
| equal(__bit_iterator<_Cp, _IC1> __first1, __bit_iterator<_Cp, _IC1> __last1, __bit_iterator<_Cp, _IC2> __first2) |
| { |
| if (__first1.__ctz_ == __first2.__ctz_) |
| return _VSTD::__equal_aligned(__first1, __last1, __first2); |
| return _VSTD::__equal_unaligned(__first1, __last1, __first2); |
| } |
| |
| template <class _Cp, bool _IsConst, |
| typename _Cp::__storage_type> |
| class __bit_iterator |
| { |
| public: |
| typedef typename _Cp::difference_type difference_type; |
| typedef bool value_type; |
| typedef __bit_iterator pointer; |
| typedef typename conditional<_IsConst, __bit_const_reference<_Cp>, __bit_reference<_Cp> >::type reference; |
| typedef random_access_iterator_tag iterator_category; |
| |
| private: |
| typedef typename _Cp::__storage_type __storage_type; |
| typedef typename conditional<_IsConst, typename _Cp::__const_storage_pointer, |
| typename _Cp::__storage_pointer>::type __storage_pointer; |
| static const unsigned __bits_per_word = _Cp::__bits_per_word; |
| |
| __storage_pointer __seg_; |
| unsigned __ctz_; |
| |
| public: |
| _LIBCPP_INLINE_VISIBILITY __bit_iterator() _NOEXCEPT |
| #if _LIBCPP_STD_VER > 11 |
| : __seg_(nullptr), __ctz_(0) |
| #endif |
| {} |
| |
| // When _IsConst=false, this is the copy constructor. |
| // It is non-trivial. Making it trivial would break ABI. |
| // When _IsConst=true, this is a converting constructor; |
| // the copy and move constructors are implicitly generated |
| // and trivial. |
| _LIBCPP_INLINE_VISIBILITY |
| __bit_iterator(const __bit_iterator<_Cp, false>& __it) _NOEXCEPT |
| : __seg_(__it.__seg_), __ctz_(__it.__ctz_) {} |
| |
| // When _IsConst=false, we have a user-provided copy constructor, |
| // so we must also provide a copy assignment operator because |
| // the implicit generation of a defaulted one is deprecated. |
| // When _IsConst=true, the assignment operators are |
| // implicitly generated and trivial. |
| _LIBCPP_INLINE_VISIBILITY |
| __bit_iterator& operator=(const _If<_IsConst, struct __private_nat, __bit_iterator>& __it) { |
| __seg_ = __it.__seg_; |
| __ctz_ = __it.__ctz_; |
| return *this; |
| } |
| |
| _LIBCPP_INLINE_VISIBILITY reference operator*() const _NOEXCEPT |
| {return reference(__seg_, __storage_type(1) << __ctz_);} |
| |
| _LIBCPP_INLINE_VISIBILITY __bit_iterator& operator++() |
| { |
| if (__ctz_ != __bits_per_word-1) |
| ++__ctz_; |
| else |
| { |
| __ctz_ = 0; |
| ++__seg_; |
| } |
| return *this; |
| } |
| |
| _LIBCPP_INLINE_VISIBILITY __bit_iterator operator++(int) |
| { |
| __bit_iterator __tmp = *this; |
| ++(*this); |
| return __tmp; |
| } |
| |
| _LIBCPP_INLINE_VISIBILITY __bit_iterator& operator--() |
| { |
| if (__ctz_ != 0) |
| --__ctz_; |
| else |
| { |
| __ctz_ = __bits_per_word - 1; |
| --__seg_; |
| } |
| return *this; |
| } |
| |
| _LIBCPP_INLINE_VISIBILITY __bit_iterator operator--(int) |
| { |
| __bit_iterator __tmp = *this; |
| --(*this); |
| return __tmp; |
| } |
| |
| _LIBCPP_INLINE_VISIBILITY __bit_iterator& operator+=(difference_type __n) |
| { |
| if (__n >= 0) |
| __seg_ += (__n + __ctz_) / __bits_per_word; |
| else |
| __seg_ += static_cast<difference_type>(__n - __bits_per_word + __ctz_ + 1) |
| / static_cast<difference_type>(__bits_per_word); |
| __n &= (__bits_per_word - 1); |
| __ctz_ = static_cast<unsigned>((__n + __ctz_) % __bits_per_word); |
| return *this; |
| } |
| |
| _LIBCPP_INLINE_VISIBILITY __bit_iterator& operator-=(difference_type __n) |
| { |
| return *this += -__n; |
| } |
| |
| _LIBCPP_INLINE_VISIBILITY __bit_iterator operator+(difference_type __n) const |
| { |
| __bit_iterator __t(*this); |
| __t += __n; |
| return __t; |
| } |
| |
| _LIBCPP_INLINE_VISIBILITY __bit_iterator operator-(difference_type __n) const |
| { |
| __bit_iterator __t(*this); |
| __t -= __n; |
| return __t; |
| } |
| |
| _LIBCPP_INLINE_VISIBILITY |
| friend __bit_iterator operator+(difference_type __n, const __bit_iterator& __it) {return __it + __n;} |
| |
| _LIBCPP_INLINE_VISIBILITY |
| friend difference_type operator-(const __bit_iterator& __x, const __bit_iterator& __y) |
| {return (__x.__seg_ - __y.__seg_) * __bits_per_word + __x.__ctz_ - __y.__ctz_;} |
| |
| _LIBCPP_INLINE_VISIBILITY reference operator[](difference_type __n) const {return *(*this + __n);} |
| |
| _LIBCPP_INLINE_VISIBILITY friend bool operator==(const __bit_iterator& __x, const __bit_iterator& __y) |
| {return __x.__seg_ == __y.__seg_ && __x.__ctz_ == __y.__ctz_;} |
| |
| _LIBCPP_INLINE_VISIBILITY friend bool operator!=(const __bit_iterator& __x, const __bit_iterator& __y) |
| {return !(__x == __y);} |
| |
| _LIBCPP_INLINE_VISIBILITY friend bool operator<(const __bit_iterator& __x, const __bit_iterator& __y) |
| {return __x.__seg_ < __y.__seg_ || (__x.__seg_ == __y.__seg_ && __x.__ctz_ < __y.__ctz_);} |
| |
| _LIBCPP_INLINE_VISIBILITY friend bool operator>(const __bit_iterator& __x, const __bit_iterator& __y) |
| {return __y < __x;} |
| |
| _LIBCPP_INLINE_VISIBILITY friend bool operator<=(const __bit_iterator& __x, const __bit_iterator& __y) |
| {return !(__y < __x);} |
| |
| _LIBCPP_INLINE_VISIBILITY friend bool operator>=(const __bit_iterator& __x, const __bit_iterator& __y) |
| {return !(__x < __y);} |
| |
| private: |
| _LIBCPP_INLINE_VISIBILITY |
| __bit_iterator(__storage_pointer __s, unsigned __ctz) _NOEXCEPT |
| : __seg_(__s), __ctz_(__ctz) {} |
| |
| friend typename _Cp::__self; |
| |
| friend class __bit_reference<_Cp>; |
| friend class __bit_const_reference<_Cp>; |
| friend class __bit_iterator<_Cp, true>; |
| template <class _Dp> friend struct __bit_array; |
| template <class _Dp> friend void __fill_n_false(__bit_iterator<_Dp, false> __first, typename _Dp::size_type __n); |
| template <class _Dp> friend void __fill_n_true(__bit_iterator<_Dp, false> __first, typename _Dp::size_type __n); |
| template <class _Dp, bool _IC> friend __bit_iterator<_Dp, false> __copy_aligned(__bit_iterator<_Dp, _IC> __first, |
| __bit_iterator<_Dp, _IC> __last, |
| __bit_iterator<_Dp, false> __result); |
| template <class _Dp, bool _IC> friend __bit_iterator<_Dp, false> __copy_unaligned(__bit_iterator<_Dp, _IC> __first, |
| __bit_iterator<_Dp, _IC> __last, |
| __bit_iterator<_Dp, false> __result); |
| template <class _Dp, bool _IC> friend __bit_iterator<_Dp, false> copy(__bit_iterator<_Dp, _IC> __first, |
| __bit_iterator<_Dp, _IC> __last, |
| __bit_iterator<_Dp, false> __result); |
| template <class _Dp, bool _IC> friend __bit_iterator<_Dp, false> __copy_backward_aligned(__bit_iterator<_Dp, _IC> __first, |
| __bit_iterator<_Dp, _IC> __last, |
| __bit_iterator<_Dp, false> __result); |
| template <class _Dp, bool _IC> friend __bit_iterator<_Dp, false> __copy_backward_unaligned(__bit_iterator<_Dp, _IC> __first, |
| __bit_iterator<_Dp, _IC> __last, |
| __bit_iterator<_Dp, false> __result); |
| template <class _Dp, bool _IC> friend __bit_iterator<_Dp, false> copy_backward(__bit_iterator<_Dp, _IC> __first, |
| __bit_iterator<_Dp, _IC> __last, |
| __bit_iterator<_Dp, false> __result); |
| template <class __C1, class __C2>friend __bit_iterator<__C2, false> __swap_ranges_aligned(__bit_iterator<__C1, false>, |
| __bit_iterator<__C1, false>, |
| __bit_iterator<__C2, false>); |
| template <class __C1, class __C2>friend __bit_iterator<__C2, false> __swap_ranges_unaligned(__bit_iterator<__C1, false>, |
| __bit_iterator<__C1, false>, |
| __bit_iterator<__C2, false>); |
| template <class __C1, class __C2>friend __bit_iterator<__C2, false> swap_ranges(__bit_iterator<__C1, false>, |
| __bit_iterator<__C1, false>, |
| __bit_iterator<__C2, false>); |
| template <class _Dp> friend __bit_iterator<_Dp, false> rotate(__bit_iterator<_Dp, false>, |
| __bit_iterator<_Dp, false>, |
| __bit_iterator<_Dp, false>); |
| template <class _Dp, bool _IC1, bool _IC2> friend bool __equal_aligned(__bit_iterator<_Dp, _IC1>, |
| __bit_iterator<_Dp, _IC1>, |
| __bit_iterator<_Dp, _IC2>); |
| template <class _Dp, bool _IC1, bool _IC2> friend bool __equal_unaligned(__bit_iterator<_Dp, _IC1>, |
| __bit_iterator<_Dp, _IC1>, |
| __bit_iterator<_Dp, _IC2>); |
| template <class _Dp, bool _IC1, bool _IC2> friend bool equal(__bit_iterator<_Dp, _IC1>, |
| __bit_iterator<_Dp, _IC1>, |
| __bit_iterator<_Dp, _IC2>); |
| template <class _Dp, bool _IC> friend __bit_iterator<_Dp, _IC> __find_bool_true(__bit_iterator<_Dp, _IC>, |
| typename _Dp::size_type); |
| template <class _Dp, bool _IC> friend __bit_iterator<_Dp, _IC> __find_bool_false(__bit_iterator<_Dp, _IC>, |
| typename _Dp::size_type); |
| template <class _Dp, bool _IC> friend typename __bit_iterator<_Dp, _IC>::difference_type |
| __count_bool_true(__bit_iterator<_Dp, _IC>, typename _Dp::size_type); |
| template <class _Dp, bool _IC> friend typename __bit_iterator<_Dp, _IC>::difference_type |
| __count_bool_false(__bit_iterator<_Dp, _IC>, typename _Dp::size_type); |
| }; |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| _LIBCPP_POP_MACROS |
| |
| #endif // _LIBCPP___BIT_REFERENCE |
