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Diffstat (limited to 'tests/libcxx/include/__bit_reference')
| -rw-r--r-- | tests/libcxx/include/__bit_reference | 1225 |
1 files changed, 1225 insertions, 0 deletions
diff --git a/tests/libcxx/include/__bit_reference b/tests/libcxx/include/__bit_reference new file mode 100644 index 00000000..bef27625 --- /dev/null +++ b/tests/libcxx/include/__bit_reference @@ -0,0 +1,1225 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___BIT_REFERENCE +#define _LIBCPP___BIT_REFERENCE + +#include <__config> +#include <algorithm> + +#pragma GCC system_header + +_LIBCPP_BEGIN_NAMESPACE_STD + +template <class _C, bool _IsConst> class __bit_iterator; +template <class _C> class __bit_const_reference; + +template <class _C> +class __bit_reference +{ + typedef typename _C::__storage_type __storage_type; + typedef typename _C::__storage_pointer __storage_pointer; + + __storage_pointer __seg_; + __storage_type __mask_; + +#if defined(__clang__) + friend typename _C::__self; +#else + friend class _C::__self; +#endif + friend class __bit_const_reference<_C>; + friend class __bit_iterator<_C, false>; +public: + _LIBCPP_INLINE_VISIBILITY operator bool() const {return static_cast<bool>(*__seg_ & __mask_);} + _LIBCPP_INLINE_VISIBILITY bool operator ~() const {return !static_cast<bool>(*this);} + + _LIBCPP_INLINE_VISIBILITY + __bit_reference& operator=(bool __x) + { + if (__x) + *__seg_ |= __mask_; + else + *__seg_ &= ~__mask_; + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + __bit_reference& operator=(const __bit_reference& __x) {return operator=(static_cast<bool>(__x));} + + _LIBCPP_INLINE_VISIBILITY void flip() {*__seg_ ^= __mask_;} + _LIBCPP_INLINE_VISIBILITY __bit_iterator<_C, false> operator&() const + {return __bit_iterator<_C, false>(__seg_, static_cast<unsigned>(__ctz(__mask_)));} +private: + _LIBCPP_INLINE_VISIBILITY + __bit_reference(__storage_pointer __s, __storage_type __m) : __seg_(__s), __mask_(__m) {} +}; + +template <class _C, class _D> +_LIBCPP_INLINE_VISIBILITY inline +void +swap(__bit_reference<_C> __x, __bit_reference<_D> __y) +{ + bool __t = __x; + __x = __y; + __y = __t; +} + +template <class _C> +_LIBCPP_INLINE_VISIBILITY inline +void +swap(__bit_reference<_C> __x, bool& __y) +{ + bool __t = __x; + __x = __y; + __y = __t; +} + +template <class _C> +_LIBCPP_INLINE_VISIBILITY inline +void +swap(bool& __x, __bit_reference<_C> __y) +{ + bool __t = __x; + __x = __y; + __y = __t; +} + +template <class _C> +class __bit_const_reference +{ + typedef typename _C::__storage_type __storage_type; + typedef typename _C::__const_storage_pointer __storage_pointer; + + __storage_pointer __seg_; + __storage_type __mask_; + +#if defined(__clang__) + friend typename _C::__self; +#else + friend class _C::__self; +#endif + friend class __bit_iterator<_C, true>; +public: + _LIBCPP_INLINE_VISIBILITY + __bit_const_reference(const __bit_reference<_C>& __x) + : __seg_(__x.__seg_), __mask_(__x.__mask_) {} + + _LIBCPP_INLINE_VISIBILITY operator bool() const {return static_cast<bool>(*__seg_ & __mask_);} + + _LIBCPP_INLINE_VISIBILITY __bit_iterator<_C, true> operator&() const + {return __bit_iterator<_C, true>(__seg_, static_cast<unsigned>(__ctz(__mask_)));} +private: + _LIBCPP_INLINE_VISIBILITY + __bit_const_reference(__storage_pointer __s, __storage_type __m) : __seg_(__s), __mask_(__m) {} + + __bit_const_reference& operator=(const __bit_const_reference& __x); +}; + +// find + +template <class _C> +__bit_iterator<_C, false> +__find_bool_true(__bit_iterator<_C, false> __first, typename _C::size_type __n) +{ + typedef __bit_iterator<_C, false> _It; + typedef typename _It::__storage_type __storage_type; + static const unsigned __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 = _STD::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>(_STD::__ctz(__b))); + __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>(_STD::__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>(_STD::__ctz(__b))); + } + return _It(__first.__seg_, static_cast<unsigned>(__n)); +} + +template <class _C> +__bit_iterator<_C, false> +__find_bool_false(__bit_iterator<_C, false> __first, typename _C::size_type __n) +{ + typedef __bit_iterator<_C, false> _It; + typedef typename _It::__storage_type __storage_type; + static const unsigned __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 = _STD::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>(_STD::__ctz(__b))); + __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>(_STD::__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>(_STD::__ctz(__b))); + } + return _It(__first.__seg_, static_cast<unsigned>(__n)); +} + +template <class _C, class _Tp> +inline _LIBCPP_INLINE_VISIBILITY +__bit_iterator<_C, false> +find(__bit_iterator<_C, false> __first, __bit_iterator<_C, false> __last, const _Tp& __value) +{ + if (static_cast<bool>(__value)) + return __find_bool_true(__first, static_cast<typename _C::size_type>(__last - __first)); + return __find_bool_false(__first, static_cast<typename _C::size_type>(__last - __first)); +} + +// count + +template <class _C> +typename __bit_iterator<_C, false>::difference_type +__count_bool_true(__bit_iterator<_C, false> __first, typename _C::size_type __n) +{ + typedef __bit_iterator<_C, false> _It; + typedef typename _It::__storage_type __storage_type; + typedef typename _It::difference_type difference_type; + static const unsigned __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 = _STD::min(__clz_f, __n); + __storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn)); + __r = _STD::__pop_count(*__first.__seg_ & __m); + __n -= __dn; + ++__first.__seg_; + } + // do middle whole words + for (; __n >= __bits_per_word; ++__first.__seg_, __n -= __bits_per_word) + __r += _STD::__pop_count(*__first.__seg_); + // do last partial word + if (__n > 0) + { + __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n); + __r += _STD::__pop_count(*__first.__seg_ & __m); + } + return __r; +} + +template <class _C> +typename __bit_iterator<_C, false>::difference_type +__count_bool_false(__bit_iterator<_C, false> __first, typename _C::size_type __n) +{ + typedef __bit_iterator<_C, false> _It; + typedef typename _It::__storage_type __storage_type; + typedef typename _It::difference_type difference_type; + static const unsigned __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 = _STD::min(__clz_f, __n); + __storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn)); + __r = _STD::__pop_count(~(*__first.__seg_ & __m)); + __n -= __dn; + ++__first.__seg_; + } + // do middle whole words + for (; __n >= __bits_per_word; ++__first.__seg_, __n -= __bits_per_word) + __r += _STD::__pop_count(~*__first.__seg_); + // do last partial word + if (__n > 0) + { + __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n); + __r += _STD::__pop_count(~(*__first.__seg_ & __m)); + } + return __r; +} + +template <class _C, class _Tp> +inline _LIBCPP_INLINE_VISIBILITY +typename __bit_iterator<_C, false>::difference_type +count(__bit_iterator<_C, false> __first, __bit_iterator<_C, false> __last, const _Tp& __value) +{ + if (static_cast<bool>(__value)) + return __count_bool_true(__first, static_cast<typename _C::size_type>(__last - __first)); + return __count_bool_false(__first, static_cast<typename _C::size_type>(__last - __first)); +} + +// fill_n + +template <class _C> +void +__fill_n_false(__bit_iterator<_C, false> __first, typename _C::size_type __n) +{ + typedef __bit_iterator<_C, false> _It; + typedef typename _It::__storage_type __storage_type; + static const unsigned __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 = _STD::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; + _STD::memset(__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 _C> +void +__fill_n_true(__bit_iterator<_C, false> __first, typename _C::size_type __n) +{ + typedef __bit_iterator<_C, false> _It; + typedef typename _It::__storage_type __storage_type; + static const unsigned __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 = _STD::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; + _STD::memset(__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 _C> +_LIBCPP_INLINE_VISIBILITY inline +void +fill_n(__bit_iterator<_C, false> __first, typename _C::size_type __n, bool __value) +{ + if (__n > 0) + { + if (__value) + __fill_n_true(__first, __n); + else + __fill_n_false(__first, __n); + } +} + +// fill + +template <class _C> +inline _LIBCPP_INLINE_VISIBILITY +void +fill(__bit_iterator<_C, false> __first, __bit_iterator<_C, false> __last, bool __value) +{ + _STD::fill_n(__first, static_cast<typename _C::size_type>(__last - __first), __value); +} + +// copy + +template <class _C, bool _IsConst> +__bit_iterator<_C, false> +__copy_aligned(__bit_iterator<_C, _IsConst> __first, __bit_iterator<_C, _IsConst> __last, + __bit_iterator<_C, false> __result) +{ + typedef __bit_iterator<_C, _IsConst> _In; + typedef typename _In::difference_type difference_type; + typedef typename _In::__storage_type __storage_type; + static const unsigned __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 = _STD::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; + _STD::memmove(__result.__seg_, __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 _C, bool _IsConst> +__bit_iterator<_C, false> +__copy_unaligned(__bit_iterator<_C, _IsConst> __first, __bit_iterator<_C, _IsConst> __last, + __bit_iterator<_C, false> __result) +{ + typedef __bit_iterator<_C, _IsConst> _In; + typedef typename _In::difference_type difference_type; + typedef typename _In::__storage_type __storage_type; + static const unsigned __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 = _STD::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 = _STD::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 = _STD::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 _C, bool _IsConst> +inline _LIBCPP_INLINE_VISIBILITY +__bit_iterator<_C, false> +copy(__bit_iterator<_C, _IsConst> __first, __bit_iterator<_C, _IsConst> __last, __bit_iterator<_C, false> __result) +{ + if (__first.__ctz_ == __result.__ctz_) + return __copy_aligned(__first, __last, __result); + return __copy_unaligned(__first, __last, __result); +} + +// copy_backward + +template <class _C, bool _IsConst> +__bit_iterator<_C, false> +__copy_backward_aligned(__bit_iterator<_C, _IsConst> __first, __bit_iterator<_C, _IsConst> __last, + __bit_iterator<_C, false> __result) +{ + typedef __bit_iterator<_C, _IsConst> _In; + typedef typename _In::difference_type difference_type; + typedef typename _In::__storage_type __storage_type; + static const unsigned __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 = _STD::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; + _STD::memmove(__result.__seg_, __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 _C, bool _IsConst> +__bit_iterator<_C, false> +__copy_backward_unaligned(__bit_iterator<_C, _IsConst> __first, __bit_iterator<_C, _IsConst> __last, + __bit_iterator<_C, false> __result) +{ + typedef __bit_iterator<_C, _IsConst> _In; + typedef typename _In::difference_type difference_type; + typedef typename _In::__storage_type __storage_type; + static const unsigned __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 = _STD::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 = _STD::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; + unsigned __clz_r = __bits_per_word - __result.__ctz_; + __storage_type __dn = _STD::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 _C, bool _IsConst> +inline _LIBCPP_INLINE_VISIBILITY +__bit_iterator<_C, false> +copy_backward(__bit_iterator<_C, _IsConst> __first, __bit_iterator<_C, _IsConst> __last, __bit_iterator<_C, false> __result) +{ + if (__last.__ctz_ == __result.__ctz_) + return __copy_backward_aligned(__first, __last, __result); + return __copy_backward_unaligned(__first, __last, __result); +} + +// move + +template <class _C, bool _IsConst> +inline _LIBCPP_INLINE_VISIBILITY +__bit_iterator<_C, false> +move(__bit_iterator<_C, _IsConst> __first, __bit_iterator<_C, _IsConst> __last, __bit_iterator<_C, false> __result) +{ + return _STD::copy(__first, __last, __result); +} + +// move_backward + +template <class _C, bool _IsConst> +inline _LIBCPP_INLINE_VISIBILITY +__bit_iterator<_C, false> +move_backward(__bit_iterator<_C, _IsConst> __first, __bit_iterator<_C, _IsConst> __last, __bit_iterator<_C, false> __result) +{ + return _STD::copy(__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; + static const unsigned __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 = _STD::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; + static const unsigned __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 = _STD::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 = _STD::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 = _STD::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 __swap_ranges_aligned(__first1, __last1, __first2); + return __swap_ranges_unaligned(__first1, __last1, __first2); +} + +// rotate + +template <class _C> +struct __bit_array +{ + typedef typename _C::difference_type difference_type; + typedef typename _C::__storage_type __storage_type; + typedef typename _C::iterator iterator; + static const unsigned __bits_per_word = _C::__bits_per_word; + static const unsigned _N = 4; + + difference_type __size_; + __storage_type __word_[_N]; + + _LIBCPP_INLINE_VISIBILITY static difference_type capacity() + {return static_cast<difference_type>(_N * __bits_per_word);} + _LIBCPP_INLINE_VISIBILITY explicit __bit_array(difference_type __s) : __size_(__s) {} + _LIBCPP_INLINE_VISIBILITY iterator begin() {return iterator(__word_, 0);} + _LIBCPP_INLINE_VISIBILITY iterator end() {return iterator(__word_ + __size_ / __bits_per_word, + static_cast<unsigned>(__size_ % __bits_per_word));} +}; + +template <class _C> +__bit_iterator<_C, false> +rotate(__bit_iterator<_C, false> __first, __bit_iterator<_C, false> __middle, __bit_iterator<_C, false> __last) +{ + typedef __bit_iterator<_C, false> _I1; + typedef typename _I1::difference_type difference_type; + typedef typename _I1::__storage_type __storage_type; + static const unsigned __bits_per_word = _I1::__bits_per_word; + 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<_C>::capacity()) + { + __bit_array<_C> __b(__d1); + _STD::copy(__first, __middle, __b.begin()); + _STD::copy(__b.begin(), __b.end(), _STD::copy(__middle, __last, __first)); + break; + } + else + { + __bit_iterator<_C, false> __mp = _STD::swap_ranges(__first, __middle, __middle); + __first = __middle; + __middle = __mp; + __d2 -= __d1; + } + } + else + { + if (__d2 <= __bit_array<_C>::capacity()) + { + __bit_array<_C> __b(__d2); + _STD::copy(__middle, __last, __b.begin()); + _STD::copy_backward(__b.begin(), __b.end(), _STD::copy_backward(__first, __middle, __last)); + break; + } + else + { + __bit_iterator<_C, false> __mp = __first + __d2; + _STD::swap_ranges(__first, __mp, __middle); + __first = __mp; + __d1 -= __d2; + } + } + } + return __r; +} + +// equal + +template <class _C> +bool +__equal_unaligned(__bit_iterator<_C, true> __first1, __bit_iterator<_C, true> __last1, + __bit_iterator<_C, true> __first2) +{ + typedef __bit_iterator<_C, true> _It; + typedef typename _It::difference_type difference_type; + typedef typename _It::__storage_type __storage_type; + static const unsigned __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 = _STD::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 _ |