815 lines
22 KiB
C++
815 lines
22 KiB
C++
// <bitset> -*- C++ -*-
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// Copyright (C) 2001 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 2, 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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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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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 std_bitset.h
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* This is an internal header file, included by other library headers.
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* You should not attempt to use it directly.
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*/
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#ifndef __GLIBCPP_BITSET
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#define __GLIBCPP_BITSET
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#pragma GCC system_header
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// A bitset of size N has N % (sizeof(unsigned long) * CHAR_BIT) unused
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// bits. (They are the high- order bits in the highest word.) It is
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// a class invariant of class bitset<> that those unused bits are
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// always zero.
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// Most of the actual code isn't contained in bitset<> itself, but in the
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// base class _Base_bitset. The base class works with whole words, not with
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// individual bits. This allows us to specialize _Base_bitset for the
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// important special case where the bitset is only a single word.
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#include <cstddef> // for size_t
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#include <cstring> // for memset
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#include <string>
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#include <stdexcept>
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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 <ostream> // for ostream (operator<<)
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#include <istream> // for istream (operator>>)
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#define _GLIBCPP_BITSET_BITS_PER_WORD (CHAR_BIT*sizeof(unsigned long))
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#define __BITSET_WORDS(__n) \
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((__n) < 1 ? 1 : ((__n) + _GLIBCPP_BITSET_BITS_PER_WORD - 1)/_GLIBCPP_BITSET_BITS_PER_WORD)
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namespace std
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{
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// structure to aid in counting bits
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template<bool __dummy>
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struct _Bit_count {
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static unsigned char _S_bit_count[256];
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};
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// Mapping from 8 bit unsigned integers to the index of the first one
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// bit:
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template<bool __dummy>
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struct _First_one {
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static unsigned char _S_first_one[256];
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};
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//
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// Base class: general case.
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//
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template<size_t _Nw>
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struct _Base_bitset {
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typedef unsigned long _WordT;
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_WordT _M_w[_Nw]; // 0 is the least significant word.
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_Base_bitset( void ) { _M_do_reset(); }
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_Base_bitset(unsigned long __val) {
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_M_do_reset();
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_M_w[0] = __val;
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}
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static size_t _S_whichword( size_t __pos )
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{ return __pos / _GLIBCPP_BITSET_BITS_PER_WORD; }
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static size_t _S_whichbyte( size_t __pos )
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{ return (__pos % _GLIBCPP_BITSET_BITS_PER_WORD) / CHAR_BIT; }
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static size_t _S_whichbit( size_t __pos )
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{ return __pos % _GLIBCPP_BITSET_BITS_PER_WORD; }
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static _WordT _S_maskbit( size_t __pos )
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{ return (static_cast<_WordT>(1)) << _S_whichbit(__pos); }
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_WordT& _M_getword(size_t __pos) { return _M_w[_S_whichword(__pos)]; }
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_WordT _M_getword(size_t __pos) const { return _M_w[_S_whichword(__pos)]; }
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_WordT& _M_hiword() { return _M_w[_Nw - 1]; }
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_WordT _M_hiword() const { return _M_w[_Nw - 1]; }
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void _M_do_and(const _Base_bitset<_Nw>& __x) {
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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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}
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void _M_do_or(const _Base_bitset<_Nw>& __x) {
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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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}
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void _M_do_xor(const _Base_bitset<_Nw>& __x) {
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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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}
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void _M_do_left_shift(size_t __shift);
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void _M_do_right_shift(size_t __shift);
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void _M_do_flip() {
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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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}
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void _M_do_set() {
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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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}
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void _M_do_reset() { memset(_M_w, 0, _Nw * sizeof(_WordT)); }
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bool _M_is_equal(const _Base_bitset<_Nw>& __x) const {
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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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}
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return true;
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}
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bool _M_is_any() const {
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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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}
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return false;
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}
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size_t _M_do_count() const {
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size_t __result = 0;
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const unsigned char* __byte_ptr = (const unsigned char*)_M_w;
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const unsigned char* __end_ptr = (const unsigned char*)(_M_w+_Nw);
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while ( __byte_ptr < __end_ptr ) {
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__result += _Bit_count<true>::_S_bit_count[*__byte_ptr];
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__byte_ptr++;
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}
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return __result;
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}
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unsigned long _M_do_to_ulong() const;
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// find first "on" bit
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size_t _M_do_find_first(size_t __not_found) const;
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// find the next "on" bit that follows "prev"
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size_t _M_do_find_next(size_t __prev, size_t __not_found) const;
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};
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//
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// Definitions of non-inline functions from _Base_bitset.
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//
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template<size_t _Nw>
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void _Base_bitset<_Nw>::_M_do_left_shift(size_t __shift)
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{
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if (__shift != 0) {
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const size_t __wshift = __shift / _GLIBCPP_BITSET_BITS_PER_WORD;
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const size_t __offset = __shift % _GLIBCPP_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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const size_t __sub_offset = _GLIBCPP_BITSET_BITS_PER_WORD - __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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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 _Base_bitset<_Nw>::_M_do_right_shift(size_t __shift)
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{
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if (__shift != 0) {
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const size_t __wshift = __shift / _GLIBCPP_BITSET_BITS_PER_WORD;
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const size_t __offset = __shift % _GLIBCPP_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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const size_t __sub_offset = _GLIBCPP_BITSET_BITS_PER_WORD - __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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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 _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("bitset");
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return _M_w[0];
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}
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template<size_t _Nw>
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size_t _Base_bitset<_Nw>::_M_do_find_first(size_t __not_found) const
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{
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for ( size_t __i = 0; __i < _Nw; __i++ ) {
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_WordT __thisword = _M_w[__i];
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if ( __thisword != static_cast<_WordT>(0) ) {
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// find byte within word
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for ( size_t __j = 0; __j < sizeof(_WordT); __j++ ) {
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unsigned char __this_byte
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= static_cast<unsigned char>(__thisword & (~(unsigned char)0));
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if ( __this_byte )
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return __i*_GLIBCPP_BITSET_BITS_PER_WORD + __j*CHAR_BIT +
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_First_one<true>::_S_first_one[__this_byte];
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__thisword >>= CHAR_BIT;
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}
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}
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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>::_M_do_find_next(size_t __prev, size_t __not_found) const
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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 * _GLIBCPP_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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// find byte within word
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// get first byte into place
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__thisword >>= _S_whichbyte(__prev) * CHAR_BIT;
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for ( size_t __j = _S_whichbyte(__prev); __j < sizeof(_WordT); __j++ ) {
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unsigned char __this_byte
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= static_cast<unsigned char>(__thisword & (~(unsigned char)0));
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if ( __this_byte )
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return __i*_GLIBCPP_BITSET_BITS_PER_WORD + __j*CHAR_BIT +
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_First_one<true>::_S_first_one[__this_byte];
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__thisword >>= CHAR_BIT;
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}
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}
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// check subsequent words
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__i++;
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for ( ; __i < _Nw; __i++ ) {
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__thisword = _M_w[__i];
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if ( __thisword != static_cast<_WordT>(0) ) {
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// find byte within word
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for ( size_t __j = 0; __j < sizeof(_WordT); __j++ ) {
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unsigned char __this_byte
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= static_cast<unsigned char>(__thisword & (~(unsigned char)0));
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if ( __this_byte )
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return __i*_GLIBCPP_BITSET_BITS_PER_WORD + __j*CHAR_BIT +
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_First_one<true>::_S_first_one[__this_byte];
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__thisword >>= CHAR_BIT;
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}
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}
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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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//
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// Base class: specialization for a single word.
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//
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template<> struct _Base_bitset<1> {
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typedef unsigned long _WordT;
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_WordT _M_w;
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_Base_bitset( void ) : _M_w(0) {}
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_Base_bitset(unsigned long __val) : _M_w(__val) {}
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static size_t _S_whichword( size_t __pos )
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{ return __pos / _GLIBCPP_BITSET_BITS_PER_WORD; }
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static size_t _S_whichbyte( size_t __pos )
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{ return (__pos % _GLIBCPP_BITSET_BITS_PER_WORD) / CHAR_BIT; }
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static size_t _S_whichbit( size_t __pos )
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{ return __pos % _GLIBCPP_BITSET_BITS_PER_WORD; }
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static _WordT _S_maskbit( size_t __pos )
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{ return (static_cast<_WordT>(1)) << _S_whichbit(__pos); }
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_WordT& _M_getword(size_t) { return _M_w; }
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_WordT _M_getword(size_t) const { return _M_w; }
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_WordT& _M_hiword() { return _M_w; }
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_WordT _M_hiword() const { return _M_w; }
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void _M_do_and(const _Base_bitset<1>& __x) { _M_w &= __x._M_w; }
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void _M_do_or(const _Base_bitset<1>& __x) { _M_w |= __x._M_w; }
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void _M_do_xor(const _Base_bitset<1>& __x) { _M_w ^= __x._M_w; }
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void _M_do_left_shift(size_t __shift) { _M_w <<= __shift; }
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void _M_do_right_shift(size_t __shift) { _M_w >>= __shift; }
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void _M_do_flip() { _M_w = ~_M_w; }
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void _M_do_set() { _M_w = ~static_cast<_WordT>(0); }
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void _M_do_reset() { _M_w = 0; }
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bool _M_is_equal(const _Base_bitset<1>& __x) const
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{ return _M_w == __x._M_w; }
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bool _M_is_any() const
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{ return _M_w != 0; }
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size_t _M_do_count() const {
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size_t __result = 0;
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const unsigned char* __byte_ptr = (const unsigned char*)&_M_w;
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const unsigned char* __end_ptr
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= ((const unsigned char*)&_M_w)+sizeof(_M_w);
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while ( __byte_ptr < __end_ptr ) {
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__result += _Bit_count<true>::_S_bit_count[*__byte_ptr];
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__byte_ptr++;
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}
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return __result;
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}
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unsigned long _M_do_to_ulong() const { return _M_w; }
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size_t _M_do_find_first(size_t __not_found) const;
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// find the next "on" bit that follows "prev"
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size_t _M_do_find_next(size_t __prev, size_t __not_found) const;
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};
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// ------------------------------------------------------------
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// Helper class to zero out the unused high-order bits in the highest word.
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template <size_t _Extrabits> struct _Sanitize {
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static void _M_do_sanitize(unsigned long& __val)
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{ __val &= ~((~static_cast<unsigned long>(0)) << _Extrabits); }
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};
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template<> struct _Sanitize<0> {
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static void _M_do_sanitize(unsigned long) {}
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};
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// ------------------------------------------------------------
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// Class bitset.
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// _Nb may be any nonzero number of type size_t.
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template<size_t _Nb>
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class bitset : private _Base_bitset<__BITSET_WORDS(_Nb)>
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{
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private:
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typedef _Base_bitset<__BITSET_WORDS(_Nb)> _Base;
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typedef unsigned long _WordT;
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private:
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void _M_do_sanitize() {
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_Sanitize<_Nb%_GLIBCPP_BITSET_BITS_PER_WORD>::_M_do_sanitize(this->_M_hiword());
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}
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public:
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// bit reference:
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class reference;
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friend class reference;
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class reference {
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friend class bitset;
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_WordT *_M_wp;
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size_t _M_bpos;
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// left undefined
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reference();
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public:
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reference( bitset& __b, size_t __pos ) {
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_M_wp = &__b._M_getword(__pos);
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_M_bpos = _Base::_S_whichbit(__pos);
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}
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~reference() {}
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// for b[i] = __x;
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reference& operator=(bool __x) {
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if ( __x )
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*_M_wp |= _Base::_S_maskbit(_M_bpos);
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else
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*_M_wp &= ~_Base::_S_maskbit(_M_bpos);
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return *this;
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}
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// for b[i] = b[__j];
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reference& operator=(const reference& __j) {
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if ( (*(__j._M_wp) & _Base::_S_maskbit(__j._M_bpos)) )
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*_M_wp |= _Base::_S_maskbit(_M_bpos);
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else
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*_M_wp &= ~_Base::_S_maskbit(_M_bpos);
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|
|
return *this;
|
|
}
|
|
|
|
// flips the bit
|
|
bool operator~() const
|
|
{ return (*(_M_wp) & _Base::_S_maskbit(_M_bpos)) == 0; }
|
|
|
|
// for __x = b[i];
|
|
operator bool() const
|
|
{ return (*(_M_wp) & _Base::_S_maskbit(_M_bpos)) != 0; }
|
|
|
|
// for b[i].flip();
|
|
reference& flip() {
|
|
*_M_wp ^= _Base::_S_maskbit(_M_bpos);
|
|
return *this;
|
|
}
|
|
};
|
|
|
|
// 23.3.5.1 constructors:
|
|
bitset() {}
|
|
bitset(unsigned long __val) : _Base_bitset<__BITSET_WORDS(_Nb)>(__val)
|
|
{ _M_do_sanitize(); }
|
|
|
|
template<class _CharT, class _Traits, class _Alloc>
|
|
explicit bitset(const basic_string<_CharT, _Traits, _Alloc>& __s,
|
|
size_t __pos = 0)
|
|
: _Base()
|
|
{
|
|
if (__pos > __s.size())
|
|
__throw_out_of_range("bitset");
|
|
_M_copy_from_string(__s, __pos,
|
|
basic_string<_CharT, _Traits, _Alloc>::npos);
|
|
}
|
|
template<class _CharT, class _Traits, class _Alloc>
|
|
bitset(const basic_string<_CharT, _Traits, _Alloc>& __s,
|
|
size_t __pos,
|
|
size_t __n)
|
|
: _Base()
|
|
{
|
|
if (__pos > __s.size())
|
|
__throw_out_of_range("bitset");
|
|
_M_copy_from_string(__s, __pos, __n);
|
|
}
|
|
|
|
// 23.3.5.2 bitset operations:
|
|
bitset<_Nb>& operator&=(const bitset<_Nb>& __rhs) {
|
|
this->_M_do_and(__rhs);
|
|
return *this;
|
|
}
|
|
|
|
bitset<_Nb>& operator|=(const bitset<_Nb>& __rhs) {
|
|
this->_M_do_or(__rhs);
|
|
return *this;
|
|
}
|
|
|
|
bitset<_Nb>& operator^=(const bitset<_Nb>& __rhs) {
|
|
this->_M_do_xor(__rhs);
|
|
return *this;
|
|
}
|
|
|
|
bitset<_Nb>& operator<<=(size_t __pos) {
|
|
this->_M_do_left_shift(__pos);
|
|
this->_M_do_sanitize();
|
|
return *this;
|
|
}
|
|
|
|
bitset<_Nb>& operator>>=(size_t __pos) {
|
|
this->_M_do_right_shift(__pos);
|
|
this->_M_do_sanitize();
|
|
return *this;
|
|
}
|
|
|
|
//
|
|
// Extension:
|
|
// Versions of single-bit set, reset, flip, test with no range checking.
|
|
//
|
|
|
|
bitset<_Nb>& _Unchecked_set(size_t __pos) {
|
|
this->_M_getword(__pos) |= _Base::_S_maskbit(__pos);
|
|
return *this;
|
|
}
|
|
|
|
bitset<_Nb>& _Unchecked_set(size_t __pos, int __val) {
|
|
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) {
|
|
this->_M_getword(__pos) &= ~_Base::_S_maskbit(__pos);
|
|
return *this;
|
|
}
|
|
|
|
bitset<_Nb>& _Unchecked_flip(size_t __pos) {
|
|
this->_M_getword(__pos) ^= _Base::_S_maskbit(__pos);
|
|
return *this;
|
|
}
|
|
|
|
bool _Unchecked_test(size_t __pos) const {
|
|
return (this->_M_getword(__pos) & _Base::_S_maskbit(__pos))
|
|
!= static_cast<_WordT>(0);
|
|
}
|
|
|
|
// Set, reset, and flip.
|
|
|
|
bitset<_Nb>& set() {
|
|
this->_M_do_set();
|
|
this->_M_do_sanitize();
|
|
return *this;
|
|
}
|
|
|
|
bitset<_Nb>& set(size_t __pos, bool __val = true) {
|
|
if (__pos >= _Nb)
|
|
__throw_out_of_range("bitset");
|
|
|
|
return _Unchecked_set(__pos, __val);
|
|
}
|
|
|
|
bitset<_Nb>& reset() {
|
|
this->_M_do_reset();
|
|
return *this;
|
|
}
|
|
|
|
bitset<_Nb>& reset(size_t __pos) {
|
|
if (__pos >= _Nb)
|
|
__throw_out_of_range("bitset");
|
|
|
|
return _Unchecked_reset(__pos);
|
|
}
|
|
|
|
bitset<_Nb>& flip() {
|
|
this->_M_do_flip();
|
|
this->_M_do_sanitize();
|
|
return *this;
|
|
}
|
|
|
|
bitset<_Nb>& flip(size_t __pos) {
|
|
if (__pos >= _Nb)
|
|
__throw_out_of_range("bitset");
|
|
|
|
return _Unchecked_flip(__pos);
|
|
}
|
|
|
|
bitset<_Nb> operator~() const {
|
|
return bitset<_Nb>(*this).flip();
|
|
}
|
|
|
|
// element access:
|
|
//for b[i];
|
|
// _GLIBCPP_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
|
|
reference operator[](size_t __pos) { return reference(*this,__pos); }
|
|
bool operator[](size_t __pos) const { return _Unchecked_test(__pos); }
|
|
|
|
unsigned long to_ulong() const { return this->_M_do_to_ulong(); }
|
|
|
|
template <class _CharT, class _Traits, class _Alloc>
|
|
basic_string<_CharT, _Traits, _Alloc> to_string() const {
|
|
basic_string<_CharT, _Traits, _Alloc> __result;
|
|
_M_copy_to_string(__result);
|
|
return __result;
|
|
}
|
|
|
|
// Helper functions for string operations.
|
|
template<class _CharT, class _Traits, class _Alloc>
|
|
void _M_copy_from_string(const basic_string<_CharT,_Traits,_Alloc>& __s,
|
|
size_t,
|
|
size_t);
|
|
|
|
template<class _CharT, class _Traits, class _Alloc>
|
|
void _M_copy_to_string(basic_string<_CharT,_Traits,_Alloc>&) const;
|
|
|
|
size_t count() const { return this->_M_do_count(); }
|
|
|
|
size_t size() const { return _Nb; }
|
|
|
|
bool operator==(const bitset<_Nb>& __rhs) const {
|
|
return this->_M_is_equal(__rhs);
|
|
}
|
|
bool operator!=(const bitset<_Nb>& __rhs) const {
|
|
return !this->_M_is_equal(__rhs);
|
|
}
|
|
|
|
bool test(size_t __pos) const {
|
|
if (__pos >= _Nb)
|
|
__throw_out_of_range("bitset");
|
|
|
|
return _Unchecked_test(__pos);
|
|
}
|
|
|
|
bool any() const { return this->_M_is_any(); }
|
|
bool none() const { return !this->_M_is_any(); }
|
|
|
|
bitset<_Nb> operator<<(size_t __pos) const
|
|
{ return bitset<_Nb>(*this) <<= __pos; }
|
|
bitset<_Nb> operator>>(size_t __pos) const
|
|
{ return bitset<_Nb>(*this) >>= __pos; }
|
|
|
|
//
|
|
// EXTENSIONS: bit-find operations. These operations are
|
|
// experimental, and are subject to change or removal in future
|
|
// versions.
|
|
//
|
|
|
|
// find the index of the first "on" bit
|
|
size_t _Find_first() const
|
|
{ return this->_M_do_find_first(_Nb); }
|
|
|
|
// find the index of the next "on" bit after prev
|
|
size_t _Find_next( size_t __prev ) const
|
|
{ return this->_M_do_find_next(__prev, _Nb); }
|
|
|
|
};
|
|
|
|
//
|
|
// Definitions of non-inline member functions.
|
|
//
|
|
|
|
template <size_t _Nb>
|
|
template<class _CharT, class _Traits, class _Alloc>
|
|
void bitset<_Nb>
|
|
::_M_copy_from_string(const basic_string<_CharT,_Traits,_Alloc>& __s,
|
|
size_t __pos,
|
|
size_t __n)
|
|
{
|
|
reset();
|
|
const size_t __nbits = min(_Nb, min(__n, __s.size() - __pos));
|
|
for (size_t __i = 0; __i < __nbits; ++__i) {
|
|
switch(__s[__pos + __nbits - __i - 1]) {
|
|
case '0':
|
|
break;
|
|
case '1':
|
|
set(__i);
|
|
break;
|
|
default:
|
|
__throw_invalid_argument("bitset");
|
|
}
|
|
}
|
|
}
|
|
|
|
template <size_t _Nb>
|
|
template <class _CharT, class _Traits, class _Alloc>
|
|
void bitset<_Nb>
|
|
::_M_copy_to_string(basic_string<_CharT, _Traits, _Alloc>& __s) const
|
|
{
|
|
__s.assign(_Nb, '0');
|
|
|
|
for (size_t __i = 0; __i < _Nb; ++__i)
|
|
if (_Unchecked_test(__i))
|
|
__s[_Nb - 1 - __i] = '1';
|
|
}
|
|
|
|
// ------------------------------------------------------------
|
|
|
|
//
|
|
// 23.3.5.3 bitset operations:
|
|
//
|
|
|
|
template <size_t _Nb>
|
|
inline bitset<_Nb> operator&(const bitset<_Nb>& __x, const bitset<_Nb>& __y) {
|
|
bitset<_Nb> __result(__x);
|
|
__result &= __y;
|
|
return __result;
|
|
}
|
|
|
|
|
|
template <size_t _Nb>
|
|
inline bitset<_Nb> operator|(const bitset<_Nb>& __x, const bitset<_Nb>& __y) {
|
|
bitset<_Nb> __result(__x);
|
|
__result |= __y;
|
|
return __result;
|
|
}
|
|
|
|
template <size_t _Nb>
|
|
inline bitset<_Nb> operator^(const bitset<_Nb>& __x, const bitset<_Nb>& __y) {
|
|
bitset<_Nb> __result(__x);
|
|
__result ^= __y;
|
|
return __result;
|
|
}
|
|
|
|
template <class _CharT, class _Traits, size_t _Nb>
|
|
basic_istream<_CharT, _Traits>&
|
|
operator>>(basic_istream<_CharT, _Traits>& __is, bitset<_Nb>& __x)
|
|
{
|
|
typedef typename _Traits::char_type char_type;
|
|
basic_string<_CharT, _Traits> __tmp;
|
|
__tmp.reserve(_Nb);
|
|
|
|
// Skip whitespace
|
|
typename basic_istream<_CharT, _Traits>::sentry __sentry(__is);
|
|
if (__sentry) {
|
|
basic_streambuf<_CharT, _Traits>* __buf = __is.rdbuf();
|
|
for (size_t __i = 0; __i < _Nb; ++__i) {
|
|
static typename _Traits::int_type __eof = _Traits::eof();
|
|
|
|
typename _Traits::int_type __c1 = __buf->sbumpc();
|
|
if (_Traits::eq_int_type(__c1, __eof)) {
|
|
__is.setstate(ios_base::eofbit);
|
|
break;
|
|
}
|
|
else {
|
|
char_type __c2 = _Traits::to_char_type(__c1);
|
|
char_type __c = __is.narrow(__c2, '*');
|
|
|
|
if (__c == '0' || __c == '1')
|
|
__tmp.push_back(__c);
|
|
else if (_Traits::eq_int_type(__buf->sputbackc(__c2), __eof)) {
|
|
__is.setstate(ios_base::failbit);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (__tmp.empty())
|
|
__is.setstate(ios_base::failbit);
|
|
else
|
|
__x._M_copy_from_string(__tmp, static_cast<size_t>(0), _Nb);
|
|
}
|
|
|
|
return __is;
|
|
}
|
|
|
|
template <class _CharT, class _Traits, size_t _Nb>
|
|
basic_ostream<_CharT, _Traits>&
|
|
operator<<(basic_ostream<_CharT, _Traits>& __os, const bitset<_Nb>& __x)
|
|
{
|
|
basic_string<_CharT, _Traits> __tmp;
|
|
__x._M_copy_to_string(__tmp);
|
|
return __os << __tmp;
|
|
}
|
|
|
|
} // namespace std
|
|
|
|
#undef __BITSET_WORDS
|
|
|
|
#endif /* __GLIBCPP_BITSET */
|
|
|
|
|
|
// Local Variables:
|
|
// mode:C++
|
|
// End:
|
|
|