596676d66c
Some more C++20 changes from P1614R2, "The Mothership has Landed". This removes all redundant equality and inequality operators in the Utilities clause, as they can be synthesized from the remaining equality operators. It also removes the single redundant operator in the Localization clause, because it didn't seem worth doing in a separate commit. * include/bits/allocator.h (operator!=): Do not define for C++20. * include/bits/locale_classes.h (operator!=): Likewise. * include/bits/std_function.h (operator==(nullptr_t, const function&)) (operator!=(const function&, nullptr_t)) (operator!=(nullptr_t, const function&)): Likewise. * include/ext/bitmap_allocator.h (operator!=): Likewise. * include/ext/debug_allocator.h (operator!=): Likewise. * include/ext/extptr_allocator.h (operator!=): Likewise. * include/ext/malloc_allocator.h (operator!=): Likewise. * include/ext/mt_allocator.h (operator!=): Likewise. * include/ext/new_allocator.h (operator!=): Likewise. * include/ext/pool_allocator.h (operator!=): Likewise. * include/ext/throw_allocator.h (operator!=): Likewise. * include/std/bitset (bitset::operator!=): Likewise. * include/std/memory_resource (operator!=): Likewise. * include/std/scoped_allocator (operator!=): Likewise.
1599 lines
45 KiB
C++
1599 lines
45 KiB
C++
// <bitset> -*- C++ -*-
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// Copyright (C) 2001-2020 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/*
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* Copyright (c) 1998
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* Silicon Graphics Computer Systems, Inc.
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Silicon Graphics makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*/
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/** @file include/bitset
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* This is a Standard C++ Library header.
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*/
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#ifndef _GLIBCXX_BITSET
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#define _GLIBCXX_BITSET 1
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#pragma GCC system_header
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#include <string>
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#include <bits/functexcept.h> // For invalid_argument, out_of_range,
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// overflow_error
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#include <iosfwd>
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#include <bits/cxxabi_forced.h>
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#if __cplusplus >= 201103L
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# include <bits/functional_hash.h>
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#endif
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#define _GLIBCXX_BITSET_BITS_PER_WORD (__CHAR_BIT__ * __SIZEOF_LONG__)
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#define _GLIBCXX_BITSET_WORDS(__n) \
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((__n) / _GLIBCXX_BITSET_BITS_PER_WORD + \
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((__n) % _GLIBCXX_BITSET_BITS_PER_WORD == 0 ? 0 : 1))
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#define _GLIBCXX_BITSET_BITS_PER_ULL (__CHAR_BIT__ * __SIZEOF_LONG_LONG__)
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_CONTAINER
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/**
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* Base class, general case. It is a class invariant that _Nw will be
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* nonnegative.
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*
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* See documentation for bitset.
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*/
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template<size_t _Nw>
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struct _Base_bitset
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{
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typedef unsigned long _WordT;
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/// 0 is the least significant word.
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_WordT _M_w[_Nw];
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_GLIBCXX_CONSTEXPR _Base_bitset() _GLIBCXX_NOEXCEPT
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: _M_w() { }
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#if __cplusplus >= 201103L
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constexpr _Base_bitset(unsigned long long __val) noexcept
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: _M_w{ _WordT(__val)
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#if __SIZEOF_LONG_LONG__ > __SIZEOF_LONG__
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, _WordT(__val >> _GLIBCXX_BITSET_BITS_PER_WORD)
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#endif
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} { }
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#else
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_Base_bitset(unsigned long __val)
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: _M_w()
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{ _M_w[0] = __val; }
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#endif
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static _GLIBCXX_CONSTEXPR size_t
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_S_whichword(size_t __pos) _GLIBCXX_NOEXCEPT
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{ return __pos / _GLIBCXX_BITSET_BITS_PER_WORD; }
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static _GLIBCXX_CONSTEXPR size_t
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_S_whichbyte(size_t __pos) _GLIBCXX_NOEXCEPT
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{ return (__pos % _GLIBCXX_BITSET_BITS_PER_WORD) / __CHAR_BIT__; }
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static _GLIBCXX_CONSTEXPR size_t
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_S_whichbit(size_t __pos) _GLIBCXX_NOEXCEPT
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{ return __pos % _GLIBCXX_BITSET_BITS_PER_WORD; }
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static _GLIBCXX_CONSTEXPR _WordT
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_S_maskbit(size_t __pos) _GLIBCXX_NOEXCEPT
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{ return (static_cast<_WordT>(1)) << _S_whichbit(__pos); }
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_WordT&
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_M_getword(size_t __pos) _GLIBCXX_NOEXCEPT
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{ return _M_w[_S_whichword(__pos)]; }
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_GLIBCXX_CONSTEXPR _WordT
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_M_getword(size_t __pos) const _GLIBCXX_NOEXCEPT
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{ return _M_w[_S_whichword(__pos)]; }
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#if __cplusplus >= 201103L
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const _WordT*
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_M_getdata() const noexcept
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{ return _M_w; }
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#endif
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_WordT&
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_M_hiword() _GLIBCXX_NOEXCEPT
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{ return _M_w[_Nw - 1]; }
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_GLIBCXX_CONSTEXPR _WordT
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_M_hiword() const _GLIBCXX_NOEXCEPT
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{ return _M_w[_Nw - 1]; }
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void
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_M_do_and(const _Base_bitset<_Nw>& __x) _GLIBCXX_NOEXCEPT
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{
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for (size_t __i = 0; __i < _Nw; __i++)
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_M_w[__i] &= __x._M_w[__i];
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}
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void
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_M_do_or(const _Base_bitset<_Nw>& __x) _GLIBCXX_NOEXCEPT
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{
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for (size_t __i = 0; __i < _Nw; __i++)
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_M_w[__i] |= __x._M_w[__i];
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}
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void
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_M_do_xor(const _Base_bitset<_Nw>& __x) _GLIBCXX_NOEXCEPT
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{
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for (size_t __i = 0; __i < _Nw; __i++)
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_M_w[__i] ^= __x._M_w[__i];
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}
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void
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_M_do_left_shift(size_t __shift) _GLIBCXX_NOEXCEPT;
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void
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_M_do_right_shift(size_t __shift) _GLIBCXX_NOEXCEPT;
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void
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_M_do_flip() _GLIBCXX_NOEXCEPT
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{
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for (size_t __i = 0; __i < _Nw; __i++)
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_M_w[__i] = ~_M_w[__i];
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}
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void
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_M_do_set() _GLIBCXX_NOEXCEPT
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{
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for (size_t __i = 0; __i < _Nw; __i++)
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_M_w[__i] = ~static_cast<_WordT>(0);
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}
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void
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_M_do_reset() _GLIBCXX_NOEXCEPT
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{ __builtin_memset(_M_w, 0, _Nw * sizeof(_WordT)); }
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bool
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_M_is_equal(const _Base_bitset<_Nw>& __x) const _GLIBCXX_NOEXCEPT
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{
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for (size_t __i = 0; __i < _Nw; ++__i)
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if (_M_w[__i] != __x._M_w[__i])
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return false;
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return true;
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}
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template<size_t _Nb>
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bool
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_M_are_all() const _GLIBCXX_NOEXCEPT
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{
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for (size_t __i = 0; __i < _Nw - 1; __i++)
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if (_M_w[__i] != ~static_cast<_WordT>(0))
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return false;
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return _M_hiword() == (~static_cast<_WordT>(0)
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>> (_Nw * _GLIBCXX_BITSET_BITS_PER_WORD
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- _Nb));
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}
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bool
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_M_is_any() const _GLIBCXX_NOEXCEPT
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{
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for (size_t __i = 0; __i < _Nw; __i++)
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if (_M_w[__i] != static_cast<_WordT>(0))
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return true;
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return false;
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}
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size_t
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_M_do_count() const _GLIBCXX_NOEXCEPT
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{
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size_t __result = 0;
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for (size_t __i = 0; __i < _Nw; __i++)
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__result += __builtin_popcountl(_M_w[__i]);
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return __result;
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}
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unsigned long
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_M_do_to_ulong() const;
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#if __cplusplus >= 201103L
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unsigned long long
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_M_do_to_ullong() const;
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#endif
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// find first "on" bit
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size_t
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_M_do_find_first(size_t) const _GLIBCXX_NOEXCEPT;
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// find the next "on" bit that follows "prev"
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size_t
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_M_do_find_next(size_t, size_t) const _GLIBCXX_NOEXCEPT;
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};
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// Definitions of non-inline functions from _Base_bitset.
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template<size_t _Nw>
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void
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_Base_bitset<_Nw>::_M_do_left_shift(size_t __shift) _GLIBCXX_NOEXCEPT
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{
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if (__builtin_expect(__shift != 0, 1))
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{
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const size_t __wshift = __shift / _GLIBCXX_BITSET_BITS_PER_WORD;
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const size_t __offset = __shift % _GLIBCXX_BITSET_BITS_PER_WORD;
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if (__offset == 0)
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for (size_t __n = _Nw - 1; __n >= __wshift; --__n)
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_M_w[__n] = _M_w[__n - __wshift];
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else
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{
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const size_t __sub_offset = (_GLIBCXX_BITSET_BITS_PER_WORD
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- __offset);
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for (size_t __n = _Nw - 1; __n > __wshift; --__n)
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_M_w[__n] = ((_M_w[__n - __wshift] << __offset)
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| (_M_w[__n - __wshift - 1] >> __sub_offset));
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_M_w[__wshift] = _M_w[0] << __offset;
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}
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std::fill(_M_w + 0, _M_w + __wshift, static_cast<_WordT>(0));
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}
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}
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template<size_t _Nw>
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void
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_Base_bitset<_Nw>::_M_do_right_shift(size_t __shift) _GLIBCXX_NOEXCEPT
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{
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if (__builtin_expect(__shift != 0, 1))
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{
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const size_t __wshift = __shift / _GLIBCXX_BITSET_BITS_PER_WORD;
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const size_t __offset = __shift % _GLIBCXX_BITSET_BITS_PER_WORD;
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const size_t __limit = _Nw - __wshift - 1;
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if (__offset == 0)
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for (size_t __n = 0; __n <= __limit; ++__n)
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_M_w[__n] = _M_w[__n + __wshift];
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else
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{
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const size_t __sub_offset = (_GLIBCXX_BITSET_BITS_PER_WORD
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- __offset);
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for (size_t __n = 0; __n < __limit; ++__n)
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_M_w[__n] = ((_M_w[__n + __wshift] >> __offset)
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| (_M_w[__n + __wshift + 1] << __sub_offset));
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_M_w[__limit] = _M_w[_Nw-1] >> __offset;
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}
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std::fill(_M_w + __limit + 1, _M_w + _Nw, static_cast<_WordT>(0));
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}
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}
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template<size_t _Nw>
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unsigned long
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_Base_bitset<_Nw>::_M_do_to_ulong() const
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{
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for (size_t __i = 1; __i < _Nw; ++__i)
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if (_M_w[__i])
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__throw_overflow_error(__N("_Base_bitset::_M_do_to_ulong"));
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return _M_w[0];
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}
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#if __cplusplus >= 201103L
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template<size_t _Nw>
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unsigned long long
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_Base_bitset<_Nw>::_M_do_to_ullong() const
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{
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const bool __dw = sizeof(unsigned long long) > sizeof(unsigned long);
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for (size_t __i = 1 + __dw; __i < _Nw; ++__i)
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if (_M_w[__i])
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__throw_overflow_error(__N("_Base_bitset::_M_do_to_ullong"));
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if (__dw)
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return _M_w[0] + (static_cast<unsigned long long>(_M_w[1])
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<< _GLIBCXX_BITSET_BITS_PER_WORD);
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return _M_w[0];
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}
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#endif
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template<size_t _Nw>
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size_t
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_Base_bitset<_Nw>::
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_M_do_find_first(size_t __not_found) const _GLIBCXX_NOEXCEPT
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{
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for (size_t __i = 0; __i < _Nw; __i++)
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{
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_WordT __thisword = _M_w[__i];
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if (__thisword != static_cast<_WordT>(0))
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return (__i * _GLIBCXX_BITSET_BITS_PER_WORD
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+ __builtin_ctzl(__thisword));
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}
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// not found, so return an indication of failure.
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return __not_found;
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}
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template<size_t _Nw>
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size_t
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_Base_bitset<_Nw>::
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_M_do_find_next(size_t __prev, size_t __not_found) const _GLIBCXX_NOEXCEPT
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{
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// make bound inclusive
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++__prev;
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// check out of bounds
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if (__prev >= _Nw * _GLIBCXX_BITSET_BITS_PER_WORD)
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return __not_found;
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// search first word
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size_t __i = _S_whichword(__prev);
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_WordT __thisword = _M_w[__i];
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// mask off bits below bound
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__thisword &= (~static_cast<_WordT>(0)) << _S_whichbit(__prev);
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if (__thisword != static_cast<_WordT>(0))
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return (__i * _GLIBCXX_BITSET_BITS_PER_WORD
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+ __builtin_ctzl(__thisword));
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// check subsequent words
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__i++;
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for (; __i < _Nw; __i++)
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{
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__thisword = _M_w[__i];
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if (__thisword != static_cast<_WordT>(0))
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return (__i * _GLIBCXX_BITSET_BITS_PER_WORD
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+ __builtin_ctzl(__thisword));
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}
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// not found, so return an indication of failure.
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return __not_found;
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} // end _M_do_find_next
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/**
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* Base class, specialization for a single word.
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*
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* See documentation for bitset.
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*/
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template<>
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struct _Base_bitset<1>
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{
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typedef unsigned long _WordT;
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_WordT _M_w;
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_GLIBCXX_CONSTEXPR _Base_bitset() _GLIBCXX_NOEXCEPT
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: _M_w(0)
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{ }
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#if __cplusplus >= 201103L
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constexpr _Base_bitset(unsigned long long __val) noexcept
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#else
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_Base_bitset(unsigned long __val)
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#endif
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: _M_w(__val)
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{ }
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static _GLIBCXX_CONSTEXPR size_t
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_S_whichword(size_t __pos) _GLIBCXX_NOEXCEPT
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{ return __pos / _GLIBCXX_BITSET_BITS_PER_WORD; }
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static _GLIBCXX_CONSTEXPR size_t
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_S_whichbyte(size_t __pos) _GLIBCXX_NOEXCEPT
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{ return (__pos % _GLIBCXX_BITSET_BITS_PER_WORD) / __CHAR_BIT__; }
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static _GLIBCXX_CONSTEXPR size_t
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_S_whichbit(size_t __pos) _GLIBCXX_NOEXCEPT
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{ return __pos % _GLIBCXX_BITSET_BITS_PER_WORD; }
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static _GLIBCXX_CONSTEXPR _WordT
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_S_maskbit(size_t __pos) _GLIBCXX_NOEXCEPT
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{ return (static_cast<_WordT>(1)) << _S_whichbit(__pos); }
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_WordT&
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_M_getword(size_t) _GLIBCXX_NOEXCEPT
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{ return _M_w; }
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_GLIBCXX_CONSTEXPR _WordT
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_M_getword(size_t) const _GLIBCXX_NOEXCEPT
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{ return _M_w; }
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#if __cplusplus >= 201103L
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const _WordT*
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_M_getdata() const noexcept
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{ return &_M_w; }
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#endif
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_WordT&
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_M_hiword() _GLIBCXX_NOEXCEPT
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{ return _M_w; }
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_GLIBCXX_CONSTEXPR _WordT
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_M_hiword() const _GLIBCXX_NOEXCEPT
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{ return _M_w; }
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void
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_M_do_and(const _Base_bitset<1>& __x) _GLIBCXX_NOEXCEPT
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{ _M_w &= __x._M_w; }
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void
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_M_do_or(const _Base_bitset<1>& __x) _GLIBCXX_NOEXCEPT
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{ _M_w |= __x._M_w; }
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void
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_M_do_xor(const _Base_bitset<1>& __x) _GLIBCXX_NOEXCEPT
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{ _M_w ^= __x._M_w; }
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void
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_M_do_left_shift(size_t __shift) _GLIBCXX_NOEXCEPT
|
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{ _M_w <<= __shift; }
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void
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_M_do_right_shift(size_t __shift) _GLIBCXX_NOEXCEPT
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{ _M_w >>= __shift; }
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void
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_M_do_flip() _GLIBCXX_NOEXCEPT
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{ _M_w = ~_M_w; }
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void
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_M_do_set() _GLIBCXX_NOEXCEPT
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{ _M_w = ~static_cast<_WordT>(0); }
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void
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_M_do_reset() _GLIBCXX_NOEXCEPT
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{ _M_w = 0; }
|
|
|
|
bool
|
|
_M_is_equal(const _Base_bitset<1>& __x) const _GLIBCXX_NOEXCEPT
|
|
{ return _M_w == __x._M_w; }
|
|
|
|
template<size_t _Nb>
|
|
bool
|
|
_M_are_all() const _GLIBCXX_NOEXCEPT
|
|
{ return _M_w == (~static_cast<_WordT>(0)
|
|
>> (_GLIBCXX_BITSET_BITS_PER_WORD - _Nb)); }
|
|
|
|
bool
|
|
_M_is_any() const _GLIBCXX_NOEXCEPT
|
|
{ return _M_w != 0; }
|
|
|
|
size_t
|
|
_M_do_count() const _GLIBCXX_NOEXCEPT
|
|
{ return __builtin_popcountl(_M_w); }
|
|
|
|
unsigned long
|
|
_M_do_to_ulong() const _GLIBCXX_NOEXCEPT
|
|
{ return _M_w; }
|
|
|
|
#if __cplusplus >= 201103L
|
|
unsigned long long
|
|
_M_do_to_ullong() const noexcept
|
|
{ return _M_w; }
|
|
#endif
|
|
|
|
size_t
|
|
_M_do_find_first(size_t __not_found) const _GLIBCXX_NOEXCEPT
|
|
{
|
|
if (_M_w != 0)
|
|
return __builtin_ctzl(_M_w);
|
|
else
|
|
return __not_found;
|
|
}
|
|
|
|
// find the next "on" bit that follows "prev"
|
|
size_t
|
|
_M_do_find_next(size_t __prev, size_t __not_found) const
|
|
_GLIBCXX_NOEXCEPT
|
|
{
|
|
++__prev;
|
|
if (__prev >= ((size_t) _GLIBCXX_BITSET_BITS_PER_WORD))
|
|
return __not_found;
|
|
|
|
_WordT __x = _M_w >> __prev;
|
|
if (__x != 0)
|
|
return __builtin_ctzl(__x) + __prev;
|
|
else
|
|
return __not_found;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Base class, specialization for no storage (zero-length %bitset).
|
|
*
|
|
* See documentation for bitset.
|
|
*/
|
|
template<>
|
|
struct _Base_bitset<0>
|
|
{
|
|
typedef unsigned long _WordT;
|
|
|
|
_GLIBCXX_CONSTEXPR _Base_bitset() _GLIBCXX_NOEXCEPT
|
|
{ }
|
|
|
|
#if __cplusplus >= 201103L
|
|
constexpr _Base_bitset(unsigned long long) noexcept
|
|
#else
|
|
_Base_bitset(unsigned long)
|
|
#endif
|
|
{ }
|
|
|
|
static _GLIBCXX_CONSTEXPR size_t
|
|
_S_whichword(size_t __pos) _GLIBCXX_NOEXCEPT
|
|
{ return __pos / _GLIBCXX_BITSET_BITS_PER_WORD; }
|
|
|
|
static _GLIBCXX_CONSTEXPR size_t
|
|
_S_whichbyte(size_t __pos) _GLIBCXX_NOEXCEPT
|
|
{ return (__pos % _GLIBCXX_BITSET_BITS_PER_WORD) / __CHAR_BIT__; }
|
|
|
|
static _GLIBCXX_CONSTEXPR size_t
|
|
_S_whichbit(size_t __pos) _GLIBCXX_NOEXCEPT
|
|
{ return __pos % _GLIBCXX_BITSET_BITS_PER_WORD; }
|
|
|
|
static _GLIBCXX_CONSTEXPR _WordT
|
|
_S_maskbit(size_t __pos) _GLIBCXX_NOEXCEPT
|
|
{ return (static_cast<_WordT>(1)) << _S_whichbit(__pos); }
|
|
|
|
// This would normally give access to the data. The bounds-checking
|
|
// in the bitset class will prevent the user from getting this far,
|
|
// but (1) it must still return an lvalue to compile, and (2) the
|
|
// user might call _Unchecked_set directly, in which case this /needs/
|
|
// to fail. Let's not penalize zero-length users unless they actually
|
|
// make an unchecked call; all the memory ugliness is therefore
|
|
// localized to this single should-never-get-this-far function.
|
|
_WordT&
|
|
_M_getword(size_t) _GLIBCXX_NOEXCEPT
|
|
{
|
|
__throw_out_of_range(__N("_Base_bitset::_M_getword"));
|
|
return *new _WordT;
|
|
}
|
|
|
|
_GLIBCXX_CONSTEXPR _WordT
|
|
_M_getword(size_t) const _GLIBCXX_NOEXCEPT
|
|
{ return 0; }
|
|
|
|
_GLIBCXX_CONSTEXPR _WordT
|
|
_M_hiword() const _GLIBCXX_NOEXCEPT
|
|
{ return 0; }
|
|
|
|
void
|
|
_M_do_and(const _Base_bitset<0>&) _GLIBCXX_NOEXCEPT
|
|
{ }
|
|
|
|
void
|
|
_M_do_or(const _Base_bitset<0>&) _GLIBCXX_NOEXCEPT
|
|
{ }
|
|
|
|
void
|
|
_M_do_xor(const _Base_bitset<0>&) _GLIBCXX_NOEXCEPT
|
|
{ }
|
|
|
|
void
|
|
_M_do_left_shift(size_t) _GLIBCXX_NOEXCEPT
|
|
{ }
|
|
|
|
void
|
|
_M_do_right_shift(size_t) _GLIBCXX_NOEXCEPT
|
|
{ }
|
|
|
|
void
|
|
_M_do_flip() _GLIBCXX_NOEXCEPT
|
|
{ }
|
|
|
|
void
|
|
_M_do_set() _GLIBCXX_NOEXCEPT
|
|
{ }
|
|
|
|
void
|
|
_M_do_reset() _GLIBCXX_NOEXCEPT
|
|
{ }
|
|
|
|
// Are all empty bitsets equal to each other? Are they equal to
|
|
// themselves? How to compare a thing which has no state? What is
|
|
// the sound of one zero-length bitset clapping?
|
|
bool
|
|
_M_is_equal(const _Base_bitset<0>&) const _GLIBCXX_NOEXCEPT
|
|
{ return true; }
|
|
|
|
template<size_t _Nb>
|
|
bool
|
|
_M_are_all() const _GLIBCXX_NOEXCEPT
|
|
{ return true; }
|
|
|
|
bool
|
|
_M_is_any() const _GLIBCXX_NOEXCEPT
|
|
{ return false; }
|
|
|
|
size_t
|
|
_M_do_count() const _GLIBCXX_NOEXCEPT
|
|
{ return 0; }
|
|
|
|
unsigned long
|
|
_M_do_to_ulong() const _GLIBCXX_NOEXCEPT
|
|
{ return 0; }
|
|
|
|
#if __cplusplus >= 201103L
|
|
unsigned long long
|
|
_M_do_to_ullong() const noexcept
|
|
{ return 0; }
|
|
#endif
|
|
|
|
// Normally "not found" is the size, but that could also be
|
|
// misinterpreted as an index in this corner case. Oh well.
|
|
size_t
|
|
_M_do_find_first(size_t) const _GLIBCXX_NOEXCEPT
|
|
{ return 0; }
|
|
|
|
size_t
|
|
_M_do_find_next(size_t, size_t) const _GLIBCXX_NOEXCEPT
|
|
{ return 0; }
|
|
};
|
|
|
|
|
|
// Helper class to zero out the unused high-order bits in the highest word.
|
|
template<size_t _Extrabits>
|
|
struct _Sanitize
|
|
{
|
|
typedef unsigned long _WordT;
|
|
|
|
static void
|
|
_S_do_sanitize(_WordT& __val) _GLIBCXX_NOEXCEPT
|
|
{ __val &= ~((~static_cast<_WordT>(0)) << _Extrabits); }
|
|
};
|
|
|
|
template<>
|
|
struct _Sanitize<0>
|
|
{
|
|
typedef unsigned long _WordT;
|
|
|
|
static void
|
|
_S_do_sanitize(_WordT) _GLIBCXX_NOEXCEPT { }
|
|
};
|
|
|
|
#if __cplusplus >= 201103L
|
|
template<size_t _Nb, bool = (_Nb < _GLIBCXX_BITSET_BITS_PER_ULL)>
|
|
struct _Sanitize_val
|
|
{
|
|
static constexpr unsigned long long
|
|
_S_do_sanitize_val(unsigned long long __val)
|
|
{ return __val; }
|
|
};
|
|
|
|
template<size_t _Nb>
|
|
struct _Sanitize_val<_Nb, true>
|
|
{
|
|
static constexpr unsigned long long
|
|
_S_do_sanitize_val(unsigned long long __val)
|
|
{ return __val & ~((~static_cast<unsigned long long>(0)) << _Nb); }
|
|
};
|
|
#endif
|
|
|
|
/**
|
|
* @brief The %bitset class represents a @e fixed-size sequence of bits.
|
|
* @ingroup utilities
|
|
*
|
|
* (Note that %bitset does @e not meet the formal requirements of a
|
|
* <a href="tables.html#65">container</a>. Mainly, it lacks iterators.)
|
|
*
|
|
* The template argument, @a Nb, may be any non-negative number,
|
|
* specifying the number of bits (e.g., "0", "12", "1024*1024").
|
|
*
|
|
* In the general unoptimized case, storage is allocated in word-sized
|
|
* blocks. Let B be the number of bits in a word, then (Nb+(B-1))/B
|
|
* words will be used for storage. B - Nb%B bits are unused. (They are
|
|
* the high-order bits in the highest word.) It is a class invariant
|
|
* that those unused bits are always zero.
|
|
*
|
|
* If you think of %bitset as <em>a simple array of bits</em>, be
|
|
* aware that your mental picture is reversed: a %bitset behaves
|
|
* the same way as bits in integers do, with the bit at index 0 in
|
|
* the <em>least significant / right-hand</em> position, and the bit at
|
|
* index Nb-1 in the <em>most significant / left-hand</em> position.
|
|
* Thus, unlike other containers, a %bitset's index <em>counts from
|
|
* right to left</em>, to put it very loosely.
|
|
*
|
|
* This behavior is preserved when translating to and from strings. For
|
|
* example, the first line of the following program probably prints
|
|
* <em>b('a') is 0001100001</em> on a modern ASCII system.
|
|
*
|
|
* @code
|
|
* #include <bitset>
|
|
* #include <iostream>
|
|
* #include <sstream>
|
|
*
|
|
* using namespace std;
|
|
*
|
|
* int main()
|
|
* {
|
|
* long a = 'a';
|
|
* bitset<10> b(a);
|
|
*
|
|
* cout << "b('a') is " << b << endl;
|
|
*
|
|
* ostringstream s;
|
|
* s << b;
|
|
* string str = s.str();
|
|
* cout << "index 3 in the string is " << str[3] << " but\n"
|
|
* << "index 3 in the bitset is " << b[3] << endl;
|
|
* }
|
|
* @endcode
|
|
*
|
|
* Also see:
|
|
* https://gcc.gnu.org/onlinedocs/libstdc++/manual/ext_containers.html
|
|
* for a description of extensions.
|
|
*
|
|
* Most of the actual code isn't contained in %bitset<> itself, but in the
|
|
* base class _Base_bitset. The base class works with whole words, not with
|
|
* individual bits. This allows us to specialize _Base_bitset for the
|
|
* important special case where the %bitset is only a single word.
|
|
*
|
|
* Extra confusion can result due to the fact that the storage for
|
|
* _Base_bitset @e is a regular array, and is indexed as such. This is
|
|
* carefully encapsulated.
|
|
*/
|
|
template<size_t _Nb>
|
|
class bitset
|
|
: private _Base_bitset<_GLIBCXX_BITSET_WORDS(_Nb)>
|
|
{
|
|
private:
|
|
typedef _Base_bitset<_GLIBCXX_BITSET_WORDS(_Nb)> _Base;
|
|
typedef unsigned long _WordT;
|
|
|
|
template<class _CharT, class _Traits, class _Alloc>
|
|
void
|
|
_M_check_initial_position(const std::basic_string<_CharT, _Traits, _Alloc>& __s,
|
|
size_t __position) const
|
|
{
|
|
if (__position > __s.size())
|
|
__throw_out_of_range_fmt(__N("bitset::bitset: __position "
|
|
"(which is %zu) > __s.size() "
|
|
"(which is %zu)"),
|
|
__position, __s.size());
|
|
}
|
|
|
|
void _M_check(size_t __position, const char *__s) const
|
|
{
|
|
if (__position >= _Nb)
|
|
__throw_out_of_range_fmt(__N("%s: __position (which is %zu) "
|
|
">= _Nb (which is %zu)"),
|
|
__s, __position, _Nb);
|
|
}
|
|
|
|
void
|
|
_M_do_sanitize() _GLIBCXX_NOEXCEPT
|
|
{
|
|
typedef _Sanitize<_Nb % _GLIBCXX_BITSET_BITS_PER_WORD> __sanitize_type;
|
|
__sanitize_type::_S_do_sanitize(this->_M_hiword());
|
|
}
|
|
|
|
#if __cplusplus >= 201103L
|
|
friend struct std::hash<bitset>;
|
|
#endif
|
|
|
|
public:
|
|
/**
|
|
* This encapsulates the concept of a single bit. An instance of this
|
|
* class is a proxy for an actual bit; this way the individual bit
|
|
* operations are done as faster word-size bitwise instructions.
|
|
*
|
|
* Most users will never need to use this class directly; conversions
|
|
* to and from bool are automatic and should be transparent. Overloaded
|
|
* operators help to preserve the illusion.
|
|
*
|
|
* (On a typical system, this <em>bit %reference</em> is 64
|
|
* times the size of an actual bit. Ha.)
|
|
*/
|
|
class reference
|
|
{
|
|
friend class bitset;
|
|
|
|
_WordT* _M_wp;
|
|
size_t _M_bpos;
|
|
|
|
// left undefined
|
|
reference();
|
|
|
|
public:
|
|
reference(bitset& __b, size_t __pos) _GLIBCXX_NOEXCEPT
|
|
{
|
|
_M_wp = &__b._M_getword(__pos);
|
|
_M_bpos = _Base::_S_whichbit(__pos);
|
|
}
|
|
|
|
#if __cplusplus >= 201103L
|
|
reference(const reference&) = default;
|
|
#endif
|
|
|
|
~reference() _GLIBCXX_NOEXCEPT
|
|
{ }
|
|
|
|
// For b[i] = __x;
|
|
reference&
|
|
operator=(bool __x) _GLIBCXX_NOEXCEPT
|
|
{
|
|
if (__x)
|
|
*_M_wp |= _Base::_S_maskbit(_M_bpos);
|
|
else
|
|
*_M_wp &= ~_Base::_S_maskbit(_M_bpos);
|
|
return *this;
|
|
}
|
|
|
|
// For b[i] = b[__j];
|
|
reference&
|
|
operator=(const reference& __j) _GLIBCXX_NOEXCEPT
|
|
{
|
|
if ((*(__j._M_wp) & _Base::_S_maskbit(__j._M_bpos)))
|
|
*_M_wp |= _Base::_S_maskbit(_M_bpos);
|
|
else
|
|
*_M_wp &= ~_Base::_S_maskbit(_M_bpos);
|
|
return *this;
|
|
}
|
|
|
|
// Flips the bit
|
|
bool
|
|
operator~() const _GLIBCXX_NOEXCEPT
|
|
{ return (*(_M_wp) & _Base::_S_maskbit(_M_bpos)) == 0; }
|
|
|
|
// For __x = b[i];
|
|
operator bool() const _GLIBCXX_NOEXCEPT
|
|
{ return (*(_M_wp) & _Base::_S_maskbit(_M_bpos)) != 0; }
|
|
|
|
// For b[i].flip();
|
|
reference&
|
|
flip() _GLIBCXX_NOEXCEPT
|
|
{
|
|
*_M_wp ^= _Base::_S_maskbit(_M_bpos);
|
|
return *this;
|
|
}
|
|
};
|
|
friend class reference;
|
|
|
|
// 23.3.5.1 constructors:
|
|
/// All bits set to zero.
|
|
_GLIBCXX_CONSTEXPR bitset() _GLIBCXX_NOEXCEPT
|
|
{ }
|
|
|
|
/// Initial bits bitwise-copied from a single word (others set to zero).
|
|
#if __cplusplus >= 201103L
|
|
constexpr bitset(unsigned long long __val) noexcept
|
|
: _Base(_Sanitize_val<_Nb>::_S_do_sanitize_val(__val)) { }
|
|
#else
|
|
bitset(unsigned long __val)
|
|
: _Base(__val)
|
|
{ _M_do_sanitize(); }
|
|
#endif
|
|
|
|
/**
|
|
* Use a subset of a string.
|
|
* @param __s A string of @a 0 and @a 1 characters.
|
|
* @param __position Index of the first character in @a __s to use;
|
|
* defaults to zero.
|
|
* @throw std::out_of_range If @a pos is bigger the size of @a __s.
|
|
* @throw std::invalid_argument If a character appears in the string
|
|
* which is neither @a 0 nor @a 1.
|
|
*/
|
|
template<class _CharT, class _Traits, class _Alloc>
|
|
explicit
|
|
bitset(const std::basic_string<_CharT, _Traits, _Alloc>& __s,
|
|
size_t __position = 0)
|
|
: _Base()
|
|
{
|
|
_M_check_initial_position(__s, __position);
|
|
_M_copy_from_string(__s, __position,
|
|
std::basic_string<_CharT, _Traits, _Alloc>::npos,
|
|
_CharT('0'), _CharT('1'));
|
|
}
|
|
|
|
/**
|
|
* Use a subset of a string.
|
|
* @param __s A string of @a 0 and @a 1 characters.
|
|
* @param __position Index of the first character in @a __s to use.
|
|
* @param __n The number of characters to copy.
|
|
* @throw std::out_of_range If @a __position is bigger the size
|
|
* of @a __s.
|
|
* @throw std::invalid_argument If a character appears in the string
|
|
* which is neither @a 0 nor @a 1.
|
|
*/
|
|
template<class _CharT, class _Traits, class _Alloc>
|
|
bitset(const std::basic_string<_CharT, _Traits, _Alloc>& __s,
|
|
size_t __position, size_t __n)
|
|
: _Base()
|
|
{
|
|
_M_check_initial_position(__s, __position);
|
|
_M_copy_from_string(__s, __position, __n, _CharT('0'), _CharT('1'));
|
|
}
|
|
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 396. what are characters zero and one.
|
|
template<class _CharT, class _Traits, class _Alloc>
|
|
bitset(const std::basic_string<_CharT, _Traits, _Alloc>& __s,
|
|
size_t __position, size_t __n,
|
|
_CharT __zero, _CharT __one = _CharT('1'))
|
|
: _Base()
|
|
{
|
|
_M_check_initial_position(__s, __position);
|
|
_M_copy_from_string(__s, __position, __n, __zero, __one);
|
|
}
|
|
|
|
#if __cplusplus >= 201103L
|
|
/**
|
|
* Construct from a character %array.
|
|
* @param __str An %array of characters @a zero and @a one.
|
|
* @param __n The number of characters to use.
|
|
* @param __zero The character corresponding to the value 0.
|
|
* @param __one The character corresponding to the value 1.
|
|
* @throw std::invalid_argument If a character appears in the string
|
|
* which is neither @a __zero nor @a __one.
|
|
*/
|
|
template<typename _CharT>
|
|
explicit
|
|
bitset(const _CharT* __str,
|
|
typename std::basic_string<_CharT>::size_type __n
|
|
= std::basic_string<_CharT>::npos,
|
|
_CharT __zero = _CharT('0'), _CharT __one = _CharT('1'))
|
|
: _Base()
|
|
{
|
|
if (!__str)
|
|
__throw_logic_error(__N("bitset::bitset(const _CharT*, ...)"));
|
|
|
|
if (__n == std::basic_string<_CharT>::npos)
|
|
__n = std::char_traits<_CharT>::length(__str);
|
|
_M_copy_from_ptr<_CharT, std::char_traits<_CharT>>(__str, __n, 0,
|
|
__n, __zero,
|
|
__one);
|
|
}
|
|
#endif
|
|
|
|
// 23.3.5.2 bitset operations:
|
|
//@{
|
|
/**
|
|
* Operations on bitsets.
|
|
* @param __rhs A same-sized bitset.
|
|
*
|
|
* These should be self-explanatory.
|
|
*/
|
|
bitset<_Nb>&
|
|
operator&=(const bitset<_Nb>& __rhs) _GLIBCXX_NOEXCEPT
|
|
{
|
|
this->_M_do_and(__rhs);
|
|
return *this;
|
|
}
|
|
|
|
bitset<_Nb>&
|
|
operator|=(const bitset<_Nb>& __rhs) _GLIBCXX_NOEXCEPT
|
|
{
|
|
this->_M_do_or(__rhs);
|
|
return *this;
|
|
}
|
|
|
|
bitset<_Nb>&
|
|
operator^=(const bitset<_Nb>& __rhs) _GLIBCXX_NOEXCEPT
|
|
{
|
|
this->_M_do_xor(__rhs);
|
|
return *this;
|
|
}
|
|
//@}
|
|
|
|
//@{
|
|
/**
|
|
* Operations on bitsets.
|
|
* @param __position The number of places to shift.
|
|
*
|
|
* These should be self-explanatory.
|
|
*/
|
|
bitset<_Nb>&
|
|
operator<<=(size_t __position) _GLIBCXX_NOEXCEPT
|
|
{
|
|
if (__builtin_expect(__position < _Nb, 1))
|
|
{
|
|
this->_M_do_left_shift(__position);
|
|
this->_M_do_sanitize();
|
|
}
|
|
else
|
|
this->_M_do_reset();
|
|
return *this;
|
|
}
|
|
|
|
bitset<_Nb>&
|
|
operator>>=(size_t __position) _GLIBCXX_NOEXCEPT
|
|
{
|
|
if (__builtin_expect(__position < _Nb, 1))
|
|
{
|
|
this->_M_do_right_shift(__position);
|
|
this->_M_do_sanitize();
|
|
}
|
|
else
|
|
this->_M_do_reset();
|
|
return *this;
|
|
}
|
|
//@}
|
|
|
|
//@{
|
|
/**
|
|
* These versions of single-bit set, reset, flip, and test are
|
|
* extensions from the SGI version. They do no range checking.
|
|
* @ingroup SGIextensions
|
|
*/
|
|
bitset<_Nb>&
|
|
_Unchecked_set(size_t __pos) _GLIBCXX_NOEXCEPT
|
|
{
|
|
this->_M_getword(__pos) |= _Base::_S_maskbit(__pos);
|
|
return *this;
|
|
}
|
|
|
|
bitset<_Nb>&
|
|
_Unchecked_set(size_t __pos, int __val) _GLIBCXX_NOEXCEPT
|
|
{
|
|
if (__val)
|
|
this->_M_getword(__pos) |= _Base::_S_maskbit(__pos);
|
|
else
|
|
this->_M_getword(__pos) &= ~_Base::_S_maskbit(__pos);
|
|
return *this;
|
|
}
|
|
|
|
bitset<_Nb>&
|
|
_Unchecked_reset(size_t __pos) _GLIBCXX_NOEXCEPT
|
|
{
|
|
this->_M_getword(__pos) &= ~_Base::_S_maskbit(__pos);
|
|
return *this;
|
|
}
|
|
|
|
bitset<_Nb>&
|
|
_Unchecked_flip(size_t __pos) _GLIBCXX_NOEXCEPT
|
|
{
|
|
this->_M_getword(__pos) ^= _Base::_S_maskbit(__pos);
|
|
return *this;
|
|
}
|
|
|
|
_GLIBCXX_CONSTEXPR bool
|
|
_Unchecked_test(size_t __pos) const _GLIBCXX_NOEXCEPT
|
|
{ return ((this->_M_getword(__pos) & _Base::_S_maskbit(__pos))
|
|
!= static_cast<_WordT>(0)); }
|
|
//@}
|
|
|
|
// Set, reset, and flip.
|
|
/**
|
|
* @brief Sets every bit to true.
|
|
*/
|
|
bitset<_Nb>&
|
|
set() _GLIBCXX_NOEXCEPT
|
|
{
|
|
this->_M_do_set();
|
|
this->_M_do_sanitize();
|
|
return *this;
|
|
}
|
|
|
|
/**
|
|
* @brief Sets a given bit to a particular value.
|
|
* @param __position The index of the bit.
|
|
* @param __val Either true or false, defaults to true.
|
|
* @throw std::out_of_range If @a pos is bigger the size of the %set.
|
|
*/
|
|
bitset<_Nb>&
|
|
set(size_t __position, bool __val = true)
|
|
{
|
|
this->_M_check(__position, __N("bitset::set"));
|
|
return _Unchecked_set(__position, __val);
|
|
}
|
|
|
|
/**
|
|
* @brief Sets every bit to false.
|
|
*/
|
|
bitset<_Nb>&
|
|
reset() _GLIBCXX_NOEXCEPT
|
|
{
|
|
this->_M_do_reset();
|
|
return *this;
|
|
}
|
|
|
|
/**
|
|
* @brief Sets a given bit to false.
|
|
* @param __position The index of the bit.
|
|
* @throw std::out_of_range If @a pos is bigger the size of the %set.
|
|
*
|
|
* Same as writing @c set(pos,false).
|
|
*/
|
|
bitset<_Nb>&
|
|
reset(size_t __position)
|
|
{
|
|
this->_M_check(__position, __N("bitset::reset"));
|
|
return _Unchecked_reset(__position);
|
|
}
|
|
|
|
/**
|
|
* @brief Toggles every bit to its opposite value.
|
|
*/
|
|
bitset<_Nb>&
|
|
flip() _GLIBCXX_NOEXCEPT
|
|
{
|
|
this->_M_do_flip();
|
|
this->_M_do_sanitize();
|
|
return *this;
|
|
}
|
|
|
|
/**
|
|
* @brief Toggles a given bit to its opposite value.
|
|
* @param __position The index of the bit.
|
|
* @throw std::out_of_range If @a pos is bigger the size of the %set.
|
|
*/
|
|
bitset<_Nb>&
|
|
flip(size_t __position)
|
|
{
|
|
this->_M_check(__position, __N("bitset::flip"));
|
|
return _Unchecked_flip(__position);
|
|
}
|
|
|
|
/// See the no-argument flip().
|
|
bitset<_Nb>
|
|
operator~() const _GLIBCXX_NOEXCEPT
|
|
{ return bitset<_Nb>(*this).flip(); }
|
|
|
|
//@{
|
|
/**
|
|
* @brief Array-indexing support.
|
|
* @param __position Index into the %bitset.
|
|
* @return A bool for a <em>const %bitset</em>. For non-const
|
|
* bitsets, an instance of the reference proxy class.
|
|
* @note These operators do no range checking and throw no exceptions,
|
|
* as required by DR 11 to the standard.
|
|
*
|
|
* _GLIBCXX_RESOLVE_LIB_DEFECTS Note that this implementation already
|
|
* resolves DR 11 (items 1 and 2), but does not do the range-checking
|
|
* required by that DR's resolution. -pme
|
|
* The DR has since been changed: range-checking is a precondition
|
|
* (users' responsibility), and these functions must not throw. -pme
|
|
*/
|
|
reference
|
|
operator[](size_t __position)
|
|
{ return reference(*this, __position); }
|
|
|
|
_GLIBCXX_CONSTEXPR bool
|
|
operator[](size_t __position) const
|
|
{ return _Unchecked_test(__position); }
|
|
//@}
|
|
|
|
/**
|
|
* @brief Returns a numerical interpretation of the %bitset.
|
|
* @return The integral equivalent of the bits.
|
|
* @throw std::overflow_error If there are too many bits to be
|
|
* represented in an @c unsigned @c long.
|
|
*/
|
|
unsigned long
|
|
to_ulong() const
|
|
{ return this->_M_do_to_ulong(); }
|
|
|
|
#if __cplusplus >= 201103L
|
|
unsigned long long
|
|
to_ullong() const
|
|
{ return this->_M_do_to_ullong(); }
|
|
#endif
|
|
|
|
/**
|
|
* @brief Returns a character interpretation of the %bitset.
|
|
* @return The string equivalent of the bits.
|
|
*
|
|
* Note the ordering of the bits: decreasing character positions
|
|
* correspond to increasing bit positions (see the main class notes for
|
|
* an example).
|
|
*/
|
|
template<class _CharT, class _Traits, class _Alloc>
|
|
std::basic_string<_CharT, _Traits, _Alloc>
|
|
to_string() const
|
|
{
|
|
std::basic_string<_CharT, _Traits, _Alloc> __result;
|
|
_M_copy_to_string(__result, _CharT('0'), _CharT('1'));
|
|
return __result;
|
|
}
|
|
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 396. what are characters zero and one.
|
|
template<class _CharT, class _Traits, class _Alloc>
|
|
std::basic_string<_CharT, _Traits, _Alloc>
|
|
to_string(_CharT __zero, _CharT __one = _CharT('1')) const
|
|
{
|
|
std::basic_string<_CharT, _Traits, _Alloc> __result;
|
|
_M_copy_to_string(__result, __zero, __one);
|
|
return __result;
|
|
}
|
|
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 434. bitset::to_string() hard to use.
|
|
template<class _CharT, class _Traits>
|
|
std::basic_string<_CharT, _Traits, std::allocator<_CharT> >
|
|
to_string() const
|
|
{ return to_string<_CharT, _Traits, std::allocator<_CharT> >(); }
|
|
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 853. to_string needs updating with zero and one.
|
|
template<class _CharT, class _Traits>
|
|
std::basic_string<_CharT, _Traits, std::allocator<_CharT> >
|
|
to_string(_CharT __zero, _CharT __one = _CharT('1')) const
|
|
{ return to_string<_CharT, _Traits,
|
|
std::allocator<_CharT> >(__zero, __one); }
|
|
|
|
template<class _CharT>
|
|
std::basic_string<_CharT, std::char_traits<_CharT>,
|
|
std::allocator<_CharT> >
|
|
to_string() const
|
|
{
|
|
return to_string<_CharT, std::char_traits<_CharT>,
|
|
std::allocator<_CharT> >();
|
|
}
|
|
|
|
template<class _CharT>
|
|
std::basic_string<_CharT, std::char_traits<_CharT>,
|
|
std::allocator<_CharT> >
|
|
to_string(_CharT __zero, _CharT __one = _CharT('1')) const
|
|
{
|
|
return to_string<_CharT, std::char_traits<_CharT>,
|
|
std::allocator<_CharT> >(__zero, __one);
|
|
}
|
|
|
|
std::basic_string<char, std::char_traits<char>, std::allocator<char> >
|
|
to_string() const
|
|
{
|
|
return to_string<char, std::char_traits<char>,
|
|
std::allocator<char> >();
|
|
}
|
|
|
|
std::basic_string<char, std::char_traits<char>, std::allocator<char> >
|
|
to_string(char __zero, char __one = '1') const
|
|
{
|
|
return to_string<char, std::char_traits<char>,
|
|
std::allocator<char> >(__zero, __one);
|
|
}
|
|
|
|
// Helper functions for string operations.
|
|
template<class _CharT, class _Traits>
|
|
void
|
|
_M_copy_from_ptr(const _CharT*, size_t, size_t, size_t,
|
|
_CharT, _CharT);
|
|
|
|
template<class _CharT, class _Traits, class _Alloc>
|
|
void
|
|
_M_copy_from_string(const std::basic_string<_CharT,
|
|
_Traits, _Alloc>& __s, size_t __pos, size_t __n,
|
|
_CharT __zero, _CharT __one)
|
|
{ _M_copy_from_ptr<_CharT, _Traits>(__s.data(), __s.size(), __pos, __n,
|
|
__zero, __one); }
|
|
|
|
template<class _CharT, class _Traits, class _Alloc>
|
|
void
|
|
_M_copy_to_string(std::basic_string<_CharT, _Traits, _Alloc>&,
|
|
_CharT, _CharT) const;
|
|
|
|
// NB: Backward compat.
|
|
template<class _CharT, class _Traits, class _Alloc>
|
|
void
|
|
_M_copy_from_string(const std::basic_string<_CharT,
|
|
_Traits, _Alloc>& __s, size_t __pos, size_t __n)
|
|
{ _M_copy_from_string(__s, __pos, __n, _CharT('0'), _CharT('1')); }
|
|
|
|
template<class _CharT, class _Traits, class _Alloc>
|
|
void
|
|
_M_copy_to_string(std::basic_string<_CharT, _Traits,_Alloc>& __s) const
|
|
{ _M_copy_to_string(__s, _CharT('0'), _CharT('1')); }
|
|
|
|
/// Returns the number of bits which are set.
|
|
size_t
|
|
count() const _GLIBCXX_NOEXCEPT
|
|
{ return this->_M_do_count(); }
|
|
|
|
/// Returns the total number of bits.
|
|
_GLIBCXX_CONSTEXPR size_t
|
|
size() const _GLIBCXX_NOEXCEPT
|
|
{ return _Nb; }
|
|
|
|
//@{
|
|
/// These comparisons for equality/inequality are, well, @e bitwise.
|
|
bool
|
|
operator==(const bitset<_Nb>& __rhs) const _GLIBCXX_NOEXCEPT
|
|
{ return this->_M_is_equal(__rhs); }
|
|
|
|
#if __cpp_impl_three_way_comparison < 201907L
|
|
bool
|
|
operator!=(const bitset<_Nb>& __rhs) const _GLIBCXX_NOEXCEPT
|
|
{ return !this->_M_is_equal(__rhs); }
|
|
#endif
|
|
//@}
|
|
|
|
/**
|
|
* @brief Tests the value of a bit.
|
|
* @param __position The index of a bit.
|
|
* @return The value at @a pos.
|
|
* @throw std::out_of_range If @a pos is bigger the size of the %set.
|
|
*/
|
|
bool
|
|
test(size_t __position) const
|
|
{
|
|
this->_M_check(__position, __N("bitset::test"));
|
|
return _Unchecked_test(__position);
|
|
}
|
|
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// DR 693. std::bitset::all() missing.
|
|
/**
|
|
* @brief Tests whether all the bits are on.
|
|
* @return True if all the bits are set.
|
|
*/
|
|
bool
|
|
all() const _GLIBCXX_NOEXCEPT
|
|
{ return this->template _M_are_all<_Nb>(); }
|
|
|
|
/**
|
|
* @brief Tests whether any of the bits are on.
|
|
* @return True if at least one bit is set.
|
|
*/
|
|
bool
|
|
any() const _GLIBCXX_NOEXCEPT
|
|
{ return this->_M_is_any(); }
|
|
|
|
/**
|
|
* @brief Tests whether any of the bits are on.
|
|
* @return True if none of the bits are set.
|
|
*/
|
|
bool
|
|
none() const _GLIBCXX_NOEXCEPT
|
|
{ return !this->_M_is_any(); }
|
|
|
|
//@{
|
|
/// Self-explanatory.
|
|
bitset<_Nb>
|
|
operator<<(size_t __position) const _GLIBCXX_NOEXCEPT
|
|
{ return bitset<_Nb>(*this) <<= __position; }
|
|
|
|
bitset<_Nb>
|
|
operator>>(size_t __position) const _GLIBCXX_NOEXCEPT
|
|
{ return bitset<_Nb>(*this) >>= __position; }
|
|
//@}
|
|
|
|
/**
|
|
* @brief Finds the index of the first "on" bit.
|
|
* @return The index of the first bit set, or size() if not found.
|
|
* @ingroup SGIextensions
|
|
* @sa _Find_next
|
|
*/
|
|
size_t
|
|
_Find_first() const _GLIBCXX_NOEXCEPT
|
|
{ return this->_M_do_find_first(_Nb); }
|
|
|
|
/**
|
|
* @brief Finds the index of the next "on" bit after prev.
|
|
* @return The index of the next bit set, or size() if not found.
|
|
* @param __prev Where to start searching.
|
|
* @ingroup SGIextensions
|
|
* @sa _Find_first
|
|
*/
|
|
size_t
|
|
_Find_next(size_t __prev) const _GLIBCXX_NOEXCEPT
|
|
{ return this->_M_do_find_next(__prev, _Nb); }
|
|
};
|
|
|
|
// Definitions of non-inline member functions.
|
|
template<size_t _Nb>
|
|
template<class _CharT, class _Traits>
|
|
void
|
|
bitset<_Nb>::
|
|
_M_copy_from_ptr(const _CharT* __s, size_t __len,
|
|
size_t __pos, size_t __n, _CharT __zero, _CharT __one)
|
|
{
|
|
reset();
|
|
const size_t __nbits = std::min(_Nb, std::min(__n, size_t(__len - __pos)));
|
|
for (size_t __i = __nbits; __i > 0; --__i)
|
|
{
|
|
const _CharT __c = __s[__pos + __nbits - __i];
|
|
if (_Traits::eq(__c, __zero))
|
|
;
|
|
else if (_Traits::eq(__c, __one))
|
|
_Unchecked_set(__i - 1);
|
|
else
|
|
__throw_invalid_argument(__N("bitset::_M_copy_from_ptr"));
|
|
}
|
|
}
|
|
|
|
template<size_t _Nb>
|
|
template<class _CharT, class _Traits, class _Alloc>
|
|
void
|
|
bitset<_Nb>::
|
|
_M_copy_to_string(std::basic_string<_CharT, _Traits, _Alloc>& __s,
|
|
_CharT __zero, _CharT __one) const
|
|
{
|
|
__s.assign(_Nb, __zero);
|
|
for (size_t __i = _Nb; __i > 0; --__i)
|
|
if (_Unchecked_test(__i - 1))
|
|
_Traits::assign(__s[_Nb - __i], __one);
|
|
}
|
|
|
|
// 23.3.5.3 bitset operations:
|
|
//@{
|
|
/**
|
|
* @brief Global bitwise operations on bitsets.
|
|
* @param __x A bitset.
|
|
* @param __y A bitset of the same size as @a __x.
|
|
* @return A new bitset.
|
|
*
|
|
* These should be self-explanatory.
|
|
*/
|
|
template<size_t _Nb>
|
|
inline bitset<_Nb>
|
|
operator&(const bitset<_Nb>& __x, const bitset<_Nb>& __y) _GLIBCXX_NOEXCEPT
|
|
{
|
|
bitset<_Nb> __result(__x);
|
|
__result &= __y;
|
|
return __result;
|
|
}
|
|
|
|
template<size_t _Nb>
|
|
inline bitset<_Nb>
|
|
operator|(const bitset<_Nb>& __x, const bitset<_Nb>& __y) _GLIBCXX_NOEXCEPT
|
|
{
|
|
bitset<_Nb> __result(__x);
|
|
__result |= __y;
|
|
return __result;
|
|
}
|
|
|
|
template <size_t _Nb>
|
|
inline bitset<_Nb>
|
|
operator^(const bitset<_Nb>& __x, const bitset<_Nb>& __y) _GLIBCXX_NOEXCEPT
|
|
{
|
|
bitset<_Nb> __result(__x);
|
|
__result ^= __y;
|
|
return __result;
|
|
}
|
|
//@}
|
|
|
|
//@{
|
|
/**
|
|
* @brief Global I/O operators for bitsets.
|
|
*
|
|
* Direct I/O between streams and bitsets is supported. Output is
|
|
* straightforward. Input will skip whitespace, only accept @a 0 and @a 1
|
|
* characters, and will only extract as many digits as the %bitset will
|
|
* hold.
|
|
*/
|
|
template<class _CharT, class _Traits, size_t _Nb>
|
|
std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>& __is, bitset<_Nb>& __x)
|
|
{
|
|
typedef typename _Traits::char_type char_type;
|
|
typedef std::basic_istream<_CharT, _Traits> __istream_type;
|
|
typedef typename __istream_type::ios_base __ios_base;
|
|
|
|
std::basic_string<_CharT, _Traits> __tmp;
|
|
__tmp.reserve(_Nb);
|
|
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 303. Bitset input operator underspecified
|
|
const char_type __zero = __is.widen('0');
|
|
const char_type __one = __is.widen('1');
|
|
|
|
typename __ios_base::iostate __state = __ios_base::goodbit;
|
|
typename __istream_type::sentry __sentry(__is);
|
|
if (__sentry)
|
|
{
|
|
__try
|
|
{
|
|
for (size_t __i = _Nb; __i > 0; --__i)
|
|
{
|
|
static typename _Traits::int_type __eof = _Traits::eof();
|
|
|
|
typename _Traits::int_type __c1 = __is.rdbuf()->sbumpc();
|
|
if (_Traits::eq_int_type(__c1, __eof))
|
|
{
|
|
__state |= __ios_base::eofbit;
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
const char_type __c2 = _Traits::to_char_type(__c1);
|
|
if (_Traits::eq(__c2, __zero))
|
|
__tmp.push_back(__zero);
|
|
else if (_Traits::eq(__c2, __one))
|
|
__tmp.push_back(__one);
|
|
else if (_Traits::
|
|
eq_int_type(__is.rdbuf()->sputbackc(__c2),
|
|
__eof))
|
|
{
|
|
__state |= __ios_base::failbit;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
__catch(__cxxabiv1::__forced_unwind&)
|
|
{
|
|
__is._M_setstate(__ios_base::badbit);
|
|
__throw_exception_again;
|
|
}
|
|
__catch(...)
|
|
{ __is._M_setstate(__ios_base::badbit); }
|
|
}
|
|
|
|
if (__tmp.empty() && _Nb)
|
|
__state |= __ios_base::failbit;
|
|
else
|
|
__x._M_copy_from_string(__tmp, static_cast<size_t>(0), _Nb,
|
|
__zero, __one);
|
|
if (__state)
|
|
__is.setstate(__state);
|
|
return __is;
|
|
}
|
|
|
|
template <class _CharT, class _Traits, size_t _Nb>
|
|
std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>& __os,
|
|
const bitset<_Nb>& __x)
|
|
{
|
|
std::basic_string<_CharT, _Traits> __tmp;
|
|
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 396. what are characters zero and one.
|
|
const ctype<_CharT>& __ct = use_facet<ctype<_CharT> >(__os.getloc());
|
|
__x._M_copy_to_string(__tmp, __ct.widen('0'), __ct.widen('1'));
|
|
return __os << __tmp;
|
|
}
|
|
//@}
|
|
|
|
_GLIBCXX_END_NAMESPACE_CONTAINER
|
|
} // namespace std
|
|
|
|
#undef _GLIBCXX_BITSET_WORDS
|
|
#undef _GLIBCXX_BITSET_BITS_PER_WORD
|
|
#undef _GLIBCXX_BITSET_BITS_PER_ULL
|
|
|
|
#if __cplusplus >= 201103L
|
|
|
|
namespace std _GLIBCXX_VISIBILITY(default)
|
|
{
|
|
_GLIBCXX_BEGIN_NAMESPACE_VERSION
|
|
|
|
// DR 1182.
|
|
/// std::hash specialization for bitset.
|
|
template<size_t _Nb>
|
|
struct hash<_GLIBCXX_STD_C::bitset<_Nb>>
|
|
: public __hash_base<size_t, _GLIBCXX_STD_C::bitset<_Nb>>
|
|
{
|
|
size_t
|
|
operator()(const _GLIBCXX_STD_C::bitset<_Nb>& __b) const noexcept
|
|
{
|
|
const size_t __clength = (_Nb + __CHAR_BIT__ - 1) / __CHAR_BIT__;
|
|
return std::_Hash_impl::hash(__b._M_getdata(), __clength);
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct hash<_GLIBCXX_STD_C::bitset<0>>
|
|
: public __hash_base<size_t, _GLIBCXX_STD_C::bitset<0>>
|
|
{
|
|
size_t
|
|
operator()(const _GLIBCXX_STD_C::bitset<0>&) const noexcept
|
|
{ return 0; }
|
|
};
|
|
|
|
_GLIBCXX_END_NAMESPACE_VERSION
|
|
} // namespace
|
|
|
|
#endif // C++11
|
|
|
|
#ifdef _GLIBCXX_DEBUG
|
|
# include <debug/bitset>
|
|
#endif
|
|
|
|
#endif /* _GLIBCXX_BITSET */
|