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dynamic_bitset.tcc
// TR2 <dynamic_bitset> -*- C++ -*- // Copyright (C) 2009-2019 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // <http://www.gnu.org/licenses/>. /** @file tr2/dynamic_bitset.tcc * This is an internal header file, included by other library headers. * Do not attempt to use it directly. @headername{tr2/dynamic_bitset} */ #ifndef _GLIBCXX_TR2_DYNAMIC_BITSET_TCC #define _GLIBCXX_TR2_DYNAMIC_BITSET_TCC 1 #pragma GCC system_header namespace std _GLIBCXX_VISIBILITY(default) { _GLIBCXX_BEGIN_NAMESPACE_VERSION namespace tr2 { // Definitions of non-inline functions from __dynamic_bitset_base. template<typename _WordT, typename _Alloc> void __dynamic_bitset_base<_WordT, _Alloc>::_M_do_left_shift(size_t __shift) { if (__builtin_expect(__shift != 0, 1)) { const size_t __wshift = __shift / _S_bits_per_block; const size_t __offset = __shift % _S_bits_per_block; if (__offset == 0) for (size_t __n = this->_M_w.size() - 1; __n >= __wshift; --__n) this->_M_w[__n] = this->_M_w[__n - __wshift]; else { const size_t __sub_offset = _S_bits_per_block - __offset; for (size_t __n = _M_w.size() - 1; __n > __wshift; --__n) this->_M_w[__n] = ((this->_M_w[__n - __wshift] << __offset) | (this->_M_w[__n - __wshift - 1] >> __sub_offset)); this->_M_w[__wshift] = this->_M_w[0] << __offset; } //// std::fill(this->_M_w.begin(), this->_M_w.begin() + __wshift, //// static_cast<_WordT>(0)); } } template<typename _WordT, typename _Alloc> void __dynamic_bitset_base<_WordT, _Alloc>::_M_do_right_shift(size_t __shift) { if (__builtin_expect(__shift != 0, 1)) { const size_t __wshift = __shift / _S_bits_per_block; const size_t __offset = __shift % _S_bits_per_block; const size_t __limit = this->_M_w.size() - __wshift - 1; if (__offset == 0) for (size_t __n = 0; __n <= __limit; ++__n) this->_M_w[__n] = this->_M_w[__n + __wshift]; else { const size_t __sub_offset = (_S_bits_per_block - __offset); for (size_t __n = 0; __n < __limit; ++__n) this->_M_w[__n] = ((this->_M_w[__n + __wshift] >> __offset) | (this->_M_w[__n + __wshift + 1] << __sub_offset)); this->_M_w[__limit] = this->_M_w[_M_w.size()-1] >> __offset; } ////std::fill(this->_M_w.begin() + __limit + 1, this->_M_w.end(), //// static_cast<_WordT>(0)); } } template<typename _WordT, typename _Alloc> unsigned long __dynamic_bitset_base<_WordT, _Alloc>::_M_do_to_ulong() const { size_t __n = sizeof(unsigned long) / sizeof(block_type); for (size_t __i = __n; __i < this->_M_w.size(); ++__i) if (this->_M_w[__i]) __throw_overflow_error(__N("__dynamic_bitset_base::_M_do_to_ulong")); unsigned long __res = 0UL; for (size_t __i = 0; __i < __n && __i < this->_M_w.size(); ++__i) __res += this->_M_w[__i] << (__i * _S_bits_per_block); return __res; } template<typename _WordT, typename _Alloc> unsigned long long __dynamic_bitset_base<_WordT, _Alloc>::_M_do_to_ullong() const { size_t __n = sizeof(unsigned long long) / sizeof(block_type); for (size_t __i = __n; __i < this->_M_w.size(); ++__i) if (this->_M_w[__i]) __throw_overflow_error(__N("__dynamic_bitset_base::_M_do_to_ullong")); unsigned long long __res = 0ULL; for (size_t __i = 0; __i < __n && __i < this->_M_w.size(); ++__i) __res += this->_M_w[__i] << (__i * _S_bits_per_block); return __res; } template<typename _WordT, typename _Alloc> size_t __dynamic_bitset_base<_WordT, _Alloc> ::_M_do_find_first(size_t __not_found) const { for (size_t __i = 0; __i < this->_M_w.size(); ++__i) { _WordT __thisword = this->_M_w[__i]; if (__thisword != static_cast<_WordT>(0)) return (__i * _S_bits_per_block + __builtin_ctzll(__thisword)); } // not found, so return an indication of failure. return __not_found; } template<typename _WordT, typename _Alloc> size_t __dynamic_bitset_base<_WordT, _Alloc> ::_M_do_find_next(size_t __prev, size_t __not_found) const { // make bound inclusive ++__prev; // check out of bounds if (__prev >= this->_M_w.size() * _S_bits_per_block) return __not_found; // search first word size_t __i = _S_whichword(__prev); _WordT __thisword = this->_M_w[__i]; // mask off bits below bound __thisword &= (~static_cast<_WordT>(0)) << _S_whichbit(__prev); if (__thisword != static_cast<_WordT>(0)) return (__i * _S_bits_per_block + __builtin_ctzll(__thisword)); // check subsequent words for (++__i; __i < this->_M_w.size(); ++__i) { __thisword = this->_M_w[__i]; if (__thisword != static_cast<_WordT>(0)) return (__i * _S_bits_per_block + __builtin_ctzll(__thisword)); } // not found, so return an indication of failure. return __not_found; } // end _M_do_find_next // Definitions of non-inline member functions. template<typename _WordT, typename _Alloc> template<typename _Traits, typename _CharT> void dynamic_bitset<_WordT, _Alloc>:: _M_copy_from_ptr(const _CharT* __str, size_t __len, size_t __pos, size_t __n, _CharT __zero, _CharT __one) { reset(); const size_t __nbits = std::min(_M_Nb, std::min(__n, __len - __pos)); for (size_t __i = __nbits; __i > 0; --__i) { const _CharT __c = __str[__pos + __nbits - __i]; if (_Traits::eq(__c, __zero)) ; else if (_Traits::eq(__c, __one)) _M_unchecked_set(__i - 1); else __throw_invalid_argument(__N("dynamic_bitset::_M_copy_from_ptr")); } } /** * @brief Stream input operator for dynamic_bitset. * @ingroup dynamic_bitset * * Input will skip whitespace and only accept '0' and '1' characters. * The %dynamic_bitset will grow as necessary to hold the string of bits. */ template<typename _CharT, typename _Traits, typename _WordT, typename _Alloc> std::basic_istream<_CharT, _Traits>& operator>>(std::basic_istream<_CharT, _Traits>& __is, dynamic_bitset<_WordT, _Alloc>& __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(__x.size()); 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 { while (1) { 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; } else break; } } } __catch(__cxxabiv1::__forced_unwind&) { __is._M_setstate(__ios_base::badbit); __throw_exception_again; } __catch(...) { __is._M_setstate(__ios_base::badbit); } } __x.resize(__tmp.size()); if (__tmp.empty() && __x.size()) __state |= __ios_base::failbit; else __x._M_copy_from_string(__tmp, static_cast<size_t>(0), __x.size(), __zero, __one); if (__state) __is.setstate(__state); return __is; } } // tr2 _GLIBCXX_END_NAMESPACE_VERSION } // std #endif /* _GLIBCXX_TR2_DYNAMIC_BITSET_TCC */