--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mingw-5.1.4/win32/include/c++/3.4.5/bitset Fri Apr 03 17:16:45 2009 +0100
@@ -0,0 +1,1229 @@
+// <bitset> -*- C++ -*-
+
+// Copyright (C) 2001, 2002, 2003, 2004 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 2, 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.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING. If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction. Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License. This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+/*
+ * Copyright (c) 1998
+ * Silicon Graphics Computer Systems, Inc.
+ *
+ * Permission to use, copy, modify, distribute and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and
+ * that both that copyright notice and this permission notice appear
+ * in supporting documentation. Silicon Graphics makes no
+ * representations about the suitability of this software for any
+ * purpose. It is provided "as is" without express or implied warranty.
+ */
+
+/** @file bitset
+ * This is a Standard C++ Library header. You should @c #include this header
+ * in your programs, rather than any of the "st[dl]_*.h" implementation files.
+ */
+
+#ifndef _GLIBCXX_BITSET
+#define _GLIBCXX_BITSET 1
+
+#pragma GCC system_header
+
+#include <cstddef> // For size_t
+#include <cstring> // For memset
+#include <limits> // For numeric_limits
+#include <string>
+#include <bits/functexcept.h> // For invalid_argument, out_of_range,
+ // overflow_error
+#include <ostream> // For ostream (operator<<)
+#include <istream> // For istream (operator>>)
+
+#define _GLIBCXX_BITSET_BITS_PER_WORD numeric_limits<unsigned long>::digits
+#define _GLIBCXX_BITSET_WORDS(__n) \
+ ((__n) < 1 ? 0 : ((__n) + _GLIBCXX_BITSET_BITS_PER_WORD - 1)/_GLIBCXX_BITSET_BITS_PER_WORD)
+
+namespace _GLIBCXX_STD
+{
+ /**
+ * @if maint
+ * Base class, general case. It is a class inveriant that _Nw will be
+ * nonnegative.
+ *
+ * See documentation for bitset.
+ * @endif
+ */
+ template<size_t _Nw>
+ struct _Base_bitset
+ {
+ typedef unsigned long _WordT;
+
+ /// 0 is the least significant word.
+ _WordT _M_w[_Nw];
+
+ _Base_bitset() { _M_do_reset(); }
+ _Base_bitset(unsigned long __val)
+ {
+ _M_do_reset();
+ _M_w[0] = __val;
+ }
+
+ static size_t
+ _S_whichword(size_t __pos )
+ { return __pos / _GLIBCXX_BITSET_BITS_PER_WORD; }
+
+ static size_t
+ _S_whichbyte(size_t __pos )
+ { return (__pos % _GLIBCXX_BITSET_BITS_PER_WORD) / __CHAR_BIT__; }
+
+ static size_t
+ _S_whichbit(size_t __pos )
+ { return __pos % _GLIBCXX_BITSET_BITS_PER_WORD; }
+
+ static _WordT
+ _S_maskbit(size_t __pos )
+ { return (static_cast<_WordT>(1)) << _S_whichbit(__pos); }
+
+ _WordT&
+ _M_getword(size_t __pos)
+ { return _M_w[_S_whichword(__pos)]; }
+
+ _WordT
+ _M_getword(size_t __pos) const
+ { return _M_w[_S_whichword(__pos)]; }
+
+ _WordT&
+ _M_hiword() { return _M_w[_Nw - 1]; }
+
+ _WordT
+ _M_hiword() const { return _M_w[_Nw - 1]; }
+
+ void
+ _M_do_and(const _Base_bitset<_Nw>& __x)
+ {
+ for (size_t __i = 0; __i < _Nw; __i++)
+ _M_w[__i] &= __x._M_w[__i];
+ }
+
+ void
+ _M_do_or(const _Base_bitset<_Nw>& __x)
+ {
+ for (size_t __i = 0; __i < _Nw; __i++)
+ _M_w[__i] |= __x._M_w[__i];
+ }
+
+ void
+ _M_do_xor(const _Base_bitset<_Nw>& __x)
+ {
+ for (size_t __i = 0; __i < _Nw; __i++)
+ _M_w[__i] ^= __x._M_w[__i];
+ }
+
+ void
+ _M_do_left_shift(size_t __shift);
+
+ void
+ _M_do_right_shift(size_t __shift);
+
+ void
+ _M_do_flip()
+ {
+ for (size_t __i = 0; __i < _Nw; __i++)
+ _M_w[__i] = ~_M_w[__i];
+ }
+
+ void
+ _M_do_set()
+ {
+ for (size_t __i = 0; __i < _Nw; __i++)
+ _M_w[__i] = ~static_cast<_WordT>(0);
+ }
+
+ void
+ _M_do_reset() { memset(_M_w, 0, _Nw * sizeof(_WordT)); }
+
+ bool
+ _M_is_equal(const _Base_bitset<_Nw>& __x) const
+ {
+ for (size_t __i = 0; __i < _Nw; ++__i)
+ {
+ if (_M_w[__i] != __x._M_w[__i])
+ return false;
+ }
+ return true;
+ }
+
+ bool
+ _M_is_any() const
+ {
+ for (size_t __i = 0; __i < _Nw; __i++)
+ {
+ if (_M_w[__i] != static_cast<_WordT>(0))
+ return true;
+ }
+ return false;
+ }
+
+ size_t
+ _M_do_count() const
+ {
+ size_t __result = 0;
+ for (size_t __i = 0; __i < _Nw; __i++)
+ __result += __builtin_popcountl(_M_w[__i]);
+ return __result;
+ }
+
+ unsigned long
+ _M_do_to_ulong() const;
+
+ // find first "on" bit
+ size_t
+ _M_do_find_first(size_t __not_found) const;
+
+ // find the next "on" bit that follows "prev"
+ size_t
+ _M_do_find_next(size_t __prev, size_t __not_found) const;
+ };
+
+ // Definitions of non-inline functions from _Base_bitset.
+ template<size_t _Nw>
+ void
+ _Base_bitset<_Nw>::_M_do_left_shift(size_t __shift)
+ {
+ if (__builtin_expect(__shift != 0, 1))
+ {
+ const size_t __wshift = __shift / _GLIBCXX_BITSET_BITS_PER_WORD;
+ const size_t __offset = __shift % _GLIBCXX_BITSET_BITS_PER_WORD;
+
+ if (__offset == 0)
+ for (size_t __n = _Nw - 1; __n >= __wshift; --__n)
+ _M_w[__n] = _M_w[__n - __wshift];
+ else
+ {
+ const size_t __sub_offset = _GLIBCXX_BITSET_BITS_PER_WORD - __offset;
+ for (size_t __n = _Nw - 1; __n > __wshift; --__n)
+ _M_w[__n] = (_M_w[__n - __wshift] << __offset) |
+ (_M_w[__n - __wshift - 1] >> __sub_offset);
+ _M_w[__wshift] = _M_w[0] << __offset;
+ }
+
+ std::fill(_M_w + 0, _M_w + __wshift, static_cast<_WordT>(0));
+ }
+ }
+
+ template<size_t _Nw>
+ void
+ _Base_bitset<_Nw>::_M_do_right_shift(size_t __shift)
+ {
+ if (__builtin_expect(__shift != 0, 1))
+ {
+ const size_t __wshift = __shift / _GLIBCXX_BITSET_BITS_PER_WORD;
+ const size_t __offset = __shift % _GLIBCXX_BITSET_BITS_PER_WORD;
+ const size_t __limit = _Nw - __wshift - 1;
+
+ if (__offset == 0)
+ for (size_t __n = 0; __n <= __limit; ++__n)
+ _M_w[__n] = _M_w[__n + __wshift];
+ else
+ {
+ const size_t __sub_offset = _GLIBCXX_BITSET_BITS_PER_WORD - __offset;
+ for (size_t __n = 0; __n < __limit; ++__n)
+ _M_w[__n] = (_M_w[__n + __wshift] >> __offset) |
+ (_M_w[__n + __wshift + 1] << __sub_offset);
+ _M_w[__limit] = _M_w[_Nw-1] >> __offset;
+ }
+
+ std::fill(_M_w + __limit + 1, _M_w + _Nw, static_cast<_WordT>(0));
+ }
+ }
+
+ template<size_t _Nw>
+ unsigned long
+ _Base_bitset<_Nw>::_M_do_to_ulong() const
+ {
+ for (size_t __i = 1; __i < _Nw; ++__i)
+ if (_M_w[__i])
+ __throw_overflow_error(__N("_Base_bitset::_M_do_to_ulong"));
+ return _M_w[0];
+ }
+
+ template<size_t _Nw>
+ size_t
+ _Base_bitset<_Nw>::_M_do_find_first(size_t __not_found) const
+ {
+ for (size_t __i = 0; __i < _Nw; __i++)
+ {
+ _WordT __thisword = _M_w[__i];
+ if (__thisword != static_cast<_WordT>(0))
+ return __i * _GLIBCXX_BITSET_BITS_PER_WORD
+ + __builtin_ctzl(__thisword);
+ }
+ // not found, so return an indication of failure.
+ return __not_found;
+ }
+
+ template<size_t _Nw>
+ size_t
+ _Base_bitset<_Nw>::_M_do_find_next(size_t __prev, size_t __not_found) const
+ {
+ // make bound inclusive
+ ++__prev;
+
+ // check out of bounds
+ if (__prev >= _Nw * _GLIBCXX_BITSET_BITS_PER_WORD)
+ return __not_found;
+
+ // search first word
+ size_t __i = _S_whichword(__prev);
+ _WordT __thisword = _M_w[__i];
+
+ // mask off bits below bound
+ __thisword &= (~static_cast<_WordT>(0)) << _S_whichbit(__prev);
+
+ if (__thisword != static_cast<_WordT>(0))
+ return __i * _GLIBCXX_BITSET_BITS_PER_WORD
+ + __builtin_ctzl(__thisword);
+
+ // check subsequent words
+ __i++;
+ for ( ; __i < _Nw; __i++ )
+ {
+ __thisword = _M_w[__i];
+ if (__thisword != static_cast<_WordT>(0))
+ return __i * _GLIBCXX_BITSET_BITS_PER_WORD
+ + __builtin_ctzl(__thisword);
+ }
+ // not found, so return an indication of failure.
+ return __not_found;
+ } // end _M_do_find_next
+
+
+ /**
+ * @if maint
+ * Base class, specialization for a single word.
+ *
+ * See documentation for bitset.
+ * @endif
+ */
+ template<>
+ struct _Base_bitset<1>
+ {
+ typedef unsigned long _WordT;
+ _WordT _M_w;
+
+ _Base_bitset( void ) : _M_w(0) {}
+ _Base_bitset(unsigned long __val) : _M_w(__val) {}
+
+ static size_t
+ _S_whichword(size_t __pos )
+ { return __pos / _GLIBCXX_BITSET_BITS_PER_WORD; }
+
+ static size_t
+ _S_whichbyte(size_t __pos )
+ { return (__pos % _GLIBCXX_BITSET_BITS_PER_WORD) / __CHAR_BIT__; }
+
+ static size_t
+ _S_whichbit(size_t __pos )
+ { return __pos % _GLIBCXX_BITSET_BITS_PER_WORD; }
+
+ static _WordT
+ _S_maskbit(size_t __pos )
+ { return (static_cast<_WordT>(1)) << _S_whichbit(__pos); }
+
+ _WordT&
+ _M_getword(size_t) { return _M_w; }
+
+ _WordT
+ _M_getword(size_t) const { return _M_w; }
+
+ _WordT&
+ _M_hiword() { return _M_w; }
+
+ _WordT
+ _M_hiword() const { return _M_w; }
+
+ void
+ _M_do_and(const _Base_bitset<1>& __x) { _M_w &= __x._M_w; }
+
+ void
+ _M_do_or(const _Base_bitset<1>& __x) { _M_w |= __x._M_w; }
+
+ void
+ _M_do_xor(const _Base_bitset<1>& __x) { _M_w ^= __x._M_w; }
+
+ void
+ _M_do_left_shift(size_t __shift) { _M_w <<= __shift; }
+
+ void
+ _M_do_right_shift(size_t __shift) { _M_w >>= __shift; }
+
+ void
+ _M_do_flip() { _M_w = ~_M_w; }
+
+ void
+ _M_do_set() { _M_w = ~static_cast<_WordT>(0); }
+
+ void
+ _M_do_reset() { _M_w = 0; }
+
+ bool
+ _M_is_equal(const _Base_bitset<1>& __x) const
+ { return _M_w == __x._M_w; }
+
+ bool
+ _M_is_any() const { return _M_w != 0; }
+
+ size_t
+ _M_do_count() const { return __builtin_popcountl(_M_w); }
+
+ unsigned long
+ _M_do_to_ulong() const { return _M_w; }
+
+ size_t
+ _M_do_find_first(size_t __not_found) const
+ {
+ 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
+ {
+ ++__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;
+ }
+ };
+
+
+ /**
+ * @if maint
+ * Base class, specialization for no storage (zero-length %bitset).
+ *
+ * See documentation for bitset.
+ * @endif
+ */
+ template<>
+ struct _Base_bitset<0>
+ {
+ typedef unsigned long _WordT;
+
+ _Base_bitset() {}
+ _Base_bitset(unsigned long) {}
+
+ static size_t
+ _S_whichword(size_t __pos )
+ { return __pos / _GLIBCXX_BITSET_BITS_PER_WORD; }
+
+ static size_t
+ _S_whichbyte(size_t __pos )
+ { return (__pos % _GLIBCXX_BITSET_BITS_PER_WORD) / __CHAR_BIT__; }
+
+ static size_t
+ _S_whichbit(size_t __pos )
+ { return __pos % _GLIBCXX_BITSET_BITS_PER_WORD; }
+
+ static _WordT
+ _S_maskbit(size_t __pos )
+ { 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) const
+ {
+ __throw_out_of_range(__N("_Base_bitset::_M_getword"));
+ return *new _WordT;
+ }
+
+ _WordT
+ _M_hiword() const { return 0; }
+
+ void
+ _M_do_and(const _Base_bitset<0>&) { }
+
+ void
+ _M_do_or(const _Base_bitset<0>&) { }
+
+ void
+ _M_do_xor(const _Base_bitset<0>&) { }
+
+ void
+ _M_do_left_shift(size_t) { }
+
+ void
+ _M_do_right_shift(size_t) { }
+
+ void
+ _M_do_flip() { }
+
+ void
+ _M_do_set() { }
+
+ void
+ _M_do_reset() { }
+
+ // 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 { return true; }
+
+ bool
+ _M_is_any() const { return false; }
+
+ size_t
+ _M_do_count() const { return 0; }
+
+ unsigned long
+ _M_do_to_ulong() const { return 0; }
+
+ // 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 { return 0; }
+
+ size_t
+ _M_do_find_next(size_t, size_t) const { return 0; }
+ };
+
+
+ // Helper class to zero out the unused high-order bits in the highest word.
+ template<size_t _Extrabits>
+ struct _Sanitize
+ {
+ static void _S_do_sanitize(unsigned long& __val)
+ { __val &= ~((~static_cast<unsigned long>(0)) << _Extrabits); }
+ };
+
+ template<>
+ struct _Sanitize<0>
+ { static void _S_do_sanitize(unsigned long) { } };
+
+
+ /**
+ * @brief The %bitset class represents a @e fixed-size sequence of bits.
+ *
+ * @ingroup Containers
+ *
+ * (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 "a simple array of bits," 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 "least significant
+ * / right-hand" position, and the bit at index Nb-1 in the "most
+ * significant / left-hand" position. Thus, unlike other containers, a
+ * %bitset's index "counts from right to left," 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
+ * "b('a') is 0001100001" 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 http://gcc.gnu.org/onlinedocs/libstdc++/ext/sgiexts.html#ch23
+ * for a description of extensions.
+ *
+ * @if maint
+ * 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.
+ * @endif
+ */
+ 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;
+
+ void
+ _M_do_sanitize()
+ {
+ _Sanitize<_Nb%_GLIBCXX_BITSET_BITS_PER_WORD>::
+ _S_do_sanitize(this->_M_hiword());
+ }
+
+ 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 "bit %reference" 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)
+ {
+ _M_wp = &__b._M_getword(__pos);
+ _M_bpos = _Base::_S_whichbit(__pos);
+ }
+
+ ~reference() { }
+
+ // For b[i] = __x;
+ reference&
+ operator=(bool __x)
+ {
+ 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)
+ {
+ 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
+ { 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;
+ }
+ };
+ friend class reference;
+
+ // 23.3.5.1 constructors:
+ /// All bits set to zero.
+ bitset() { }
+
+ /// Initial bits bitwise-copied from a single word (others set to zero).
+ bitset(unsigned long __val) : _Base(__val)
+ { _M_do_sanitize(); }
+
+ /**
+ * @brief Use a subset of a string.
+ * @param s A string of '0' and '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 '0' nor '1'.
+ */
+ template<class _CharT, class _Traits, class _Alloc>
+ explicit bitset(const basic_string<_CharT, _Traits, _Alloc>& __s,
+ size_t __position = 0) : _Base()
+ {
+ if (__position > __s.size())
+ __throw_out_of_range(__N("bitset::bitset initial position "
+ "not valid"));
+ _M_copy_from_string(__s, __position,
+ basic_string<_CharT, _Traits, _Alloc>::npos);
+ }
+
+ /**
+ * @brief Use a subset of a string.
+ * @param s A string of '0' and '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 pos is bigger the size of @a s.
+ * @throw std::invalid_argument If a character appears in the string
+ * which is neither '0' nor '1'.
+ */
+ template<class _CharT, class _Traits, class _Alloc>
+ bitset(const basic_string<_CharT, _Traits, _Alloc>& __s,
+ size_t __position, size_t __n) : _Base()
+ {
+ if (__position > __s.size())
+ __throw_out_of_range(__N("bitset::bitset initial position "
+ "not valid"));
+ _M_copy_from_string(__s, __position, __n);
+ }
+
+ // 23.3.5.2 bitset operations:
+ //@{
+ /**
+ * @brief Operations on bitsets.
+ * @param rhs A same-sized bitset.
+ *
+ * These should be self-explanatory.
+ */
+ 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;
+ }
+ //@}
+
+ //@{
+ /**
+ * @brief Operations on bitsets.
+ * @param position The number of places to shift.
+ *
+ * These should be self-explanatory.
+ */
+ bitset<_Nb>&
+ operator<<=(size_t __position)
+ {
+ 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)
+ {
+ 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)
+ {
+ 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.
+ /**
+ * @brief Sets every bit to true.
+ */
+ bitset<_Nb>&
+ set()
+ {
+ 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)
+ {
+ if (__position >= _Nb)
+ __throw_out_of_range(__N("bitset::set"));
+ return _Unchecked_set(__position, __val);
+ }
+
+ /**
+ * @brief Sets every bit to false.
+ */
+ bitset<_Nb>&
+ reset()
+ {
+ 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)
+ {
+ if (__position >= _Nb)
+ __throw_out_of_range(__N("bitset::reset"));
+ return _Unchecked_reset(__position);
+ }
+
+ /**
+ * @brief Toggles every bit to its opposite value.
+ */
+ bitset<_Nb>&
+ flip()
+ {
+ 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)
+ {
+ if (__position >= _Nb)
+ __throw_out_of_range(__N("bitset::flip"));
+ return _Unchecked_flip(__position);
+ }
+
+ /// See the no-argument flip().
+ bitset<_Nb>
+ operator~() const { return bitset<_Nb>(*this).flip(); }
+
+ //@{
+ /**
+ * @brief Array-indexing support.
+ * @param position Index into the %bitset.
+ * @return A bool for a 'const %bitset'. 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.
+ *
+ * @if maint
+ * _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
+ * @endif
+ */
+ reference
+ operator[](size_t __position) { return reference(*this,__position); }
+
+ bool
+ operator[](size_t __position) const { return _Unchecked_test(__position); }
+ //@}
+
+ /**
+ * @brief Retuns 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(); }
+
+ /**
+ * @brief Retuns 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).
+ *
+ * Also note that you must specify the string's template parameters
+ * explicitly. Given a bitset @c bs and a string @s:
+ * @code
+ * s = bs.to_string<char,char_traits<char>,allocator<char> >();
+ * @endcode
+ */
+ 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;
+
+ /// Returns the number of bits which are set.
+ size_t
+ count() const { return this->_M_do_count(); }
+
+ /// Returns the total number of bits.
+ size_t
+ size() const { return _Nb; }
+
+ //@{
+ /// These comparisons for equality/inequality are, well, @e bitwise.
+ 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); }
+ //@}
+
+ /**
+ * @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
+ {
+ if (__position >= _Nb)
+ __throw_out_of_range(__N("bitset::test"));
+ return _Unchecked_test(__position);
+ }
+
+ /**
+ * @brief Tests whether any of the bits are on.
+ * @return True if at least one bit is set.
+ */
+ bool
+ any() const { 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 { return !this->_M_is_any(); }
+
+ //@{
+ /// Self-explanatory.
+ bitset<_Nb>
+ operator<<(size_t __position) const
+ { return bitset<_Nb>(*this) <<= __position; }
+
+ bitset<_Nb>
+ operator>>(size_t __position) const
+ { 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
+ { 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
+ { 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 = std::min(_Nb, std::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(__N("bitset::_M_copy_from_string"));
+ }
+ }
+ }
+
+ 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:
+ //@{
+ /**
+ * @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)
+ {
+ 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;
+ }
+ //@}
+
+ //@{
+ /**
+ * @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 '0' and '1'
+ * characters, and will only extract as many digits as the %bitset will
+ * hold.
+ */
+ 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);
+
+ ios_base::iostate __state = ios_base::goodbit;
+ typename basic_istream<_CharT, _Traits>::sentry __sentry(__is);
+ if (__sentry)
+ {
+ try
+ {
+ basic_streambuf<_CharT, _Traits>* __buf = __is.rdbuf();
+ // _GLIBCXX_RESOLVE_LIB_DEFECTS
+ // 303. Bitset input operator underspecified
+ const char_type __zero = __is.widen('0');
+ const char_type __one = __is.widen('1');
+ 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))
+ {
+ __state |= ios_base::eofbit;
+ break;
+ }
+ else
+ {
+ char_type __c2 = _Traits::to_char_type(__c1);
+ if (__c2 == __zero)
+ __tmp.push_back('0');
+ else if (__c2 == __one)
+ __tmp.push_back('1');
+ else if (_Traits::eq_int_type(__buf->sputbackc(__c2),
+ __eof))
+ {
+ __state |= ios_base::failbit;
+ break;
+ }
+ }
+ }
+ }
+ 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);
+ if (__state)
+ __is.setstate(__state);
+ 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 _GLIBCXX_BITSET_WORDS
+#undef _GLIBCXX_BITSET_BITS_PER_WORD
+
+#ifdef _GLIBCXX_DEBUG
+# include <debug/bitset>
+#endif
+
+#endif /* _GLIBCXX_BITSET */