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// vector<bool> specialization -*- C++ -*-

// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010

// 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/>.

/*

 *

 * Copyright (c) 1994

 * Hewlett-Packard Company

 *

 * 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.  Hewlett-Packard Company makes no

 * representations about the suitability of this software for any

 * purpose.  It is provided "as is" without express or implied warranty.

 *

 *

 * Copyright (c) 1996-1999

 * 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 stl_bvector.h

 *  This is an internal header file, included by other library headers.

 *  You should not attempt to use it directly.

 */

#ifndef _STL_BVECTOR_H

#define _STL_BVECTOR_H 1

#include <initializer_list>

_GLIBCXX_BEGIN_NESTED_NAMESPACE(std, _GLIBCXX_STD_D)

  typedef unsigned long _Bit_type;

  enum { _S_word_bit = int(__CHAR_BIT__ * sizeof(_Bit_type)) };

  struct _Bit_reference

  {

    _Bit_type * _M_p;

    _Bit_type _M_mask;

    _Bit_reference(_Bit_type * __x, _Bit_type __y)

    : _M_p(__x), _M_mask(__y) { }

    _Bit_reference() : _M_p(0), _M_mask(0) { }

    operator bool() const

    { return !!(*_M_p & _M_mask); }

    _Bit_reference&

    operator=(bool __x)

    {

      if (__x)

        *_M_p |= _M_mask;

      else

        *_M_p &= ~_M_mask;

      return *this;

    }

    _Bit_reference&

    operator=(const _Bit_reference& __x)

    { return *this = bool(__x); }

    bool

    operator==(const _Bit_reference& __x) const

    { return bool(*this) == bool(__x); }

    bool

    operator<(const _Bit_reference& __x) const

    { return !bool(*this) && bool(__x); }

    void

    flip()

    { *_M_p ^= _M_mask; }

  };

  struct _Bit_iterator_base

  : public std::iterator<std::random_access_iterator_tag, bool>

  {

    _Bit_type * _M_p;

    unsigned int _M_offset;

    _Bit_iterator_base(_Bit_type * __x, unsigned int __y)

    : _M_p(__x), _M_offset(__y) { }

    void

    _M_bump_up()

    {

      if (_M_offset++ == int(_S_word_bit) - 1)

        {

          _M_offset = 0;

          ++_M_p;

        }

    }

    void

    _M_bump_down()

    {

      if (_M_offset-- == 0)

        {

          _M_offset = int(_S_word_bit) - 1;

          --_M_p;

        }

    }

    void

    _M_incr(ptrdiff_t __i)

    {

      difference_type __n = __i + _M_offset;

      _M_p += __n / int(_S_word_bit);

      __n = __n % int(_S_word_bit);

      if (__n < 0)

        {

          __n += int(_S_word_bit);

          --_M_p;

        }

      _M_offset = static_cast<unsigned int>(__n);

    }

    bool

    operator==(const _Bit_iterator_base& __i) const

    { return _M_p == __i._M_p && _M_offset == __i._M_offset; }

    bool

    operator<(const _Bit_iterator_base& __i) const

    {

      return _M_p < __i._M_p

             || (_M_p == __i._M_p && _M_offset < __i._M_offset);

    }

    bool

    operator!=(const _Bit_iterator_base& __i) const

    { return !(*this == __i); }

    bool

    operator>(const _Bit_iterator_base& __i) const

    { return __i < *this; }

    bool

    operator<=(const _Bit_iterator_base& __i) const

    { return !(__i < *this); }

    bool

    operator>=(const _Bit_iterator_base& __i) const

    { return !(*this < __i); }

  };

  inline ptrdiff_t

  operator-(const _Bit_iterator_base& __x, const _Bit_iterator_base& __y)

  {

    return (int(_S_word_bit) * (__x._M_p - __y._M_p)

            + __x._M_offset - __y._M_offset);

  }

  struct _Bit_iterator : public _Bit_iterator_base

  {

    typedef _Bit_reference  reference;

    typedef _Bit_reference* pointer;

    typedef _Bit_iterator   iterator;

    _Bit_iterator() : _Bit_iterator_base(0, 0) { }

    _Bit_iterator(_Bit_type * __x, unsigned int __y)

    : _Bit_iterator_base(__x, __y) { }

    reference

    operator*() const

    { return reference(_M_p, 1UL << _M_offset); }

    iterator&

    operator++()

    {

      _M_bump_up();

      return *this;

    }

    iterator

    operator++(int)

    {

      iterator __tmp = *this;

      _M_bump_up();

      return __tmp;

    }

    iterator&

    operator--()

    {

      _M_bump_down();

      return *this;

    }

    iterator

    operator--(int)

    {

      iterator __tmp = *this;

      _M_bump_down();

      return __tmp;

    }

    iterator&

    operator+=(difference_type __i)

    {

      _M_incr(__i);

      return *this;

    }

    iterator&

    operator-=(difference_type __i)

    {

      *this += -__i;

      return *this;

    }

    iterator

    operator+(difference_type __i) const

    {

      iterator __tmp = *this;

      return __tmp += __i;

    }

    iterator

    operator-(difference_type __i) const

    {

      iterator __tmp = *this;

      return __tmp -= __i;

    }

    reference

    operator[](difference_type __i) const

    { return *(*this + __i); }

  };

  inline _Bit_iterator

  operator+(ptrdiff_t __n, const _Bit_iterator& __x)

  { return __x + __n; }

  struct _Bit_const_iterator : public _Bit_iterator_base

  {

    typedef bool                 reference;

    typedef bool                 const_reference;

    typedef const bool*          pointer;

    typedef _Bit_const_iterator  const_iterator;

    _Bit_const_iterator() : _Bit_iterator_base(0, 0) { }

    _Bit_const_iterator(_Bit_type * __x, unsigned int __y)

    : _Bit_iterator_base(__x, __y) { }

    _Bit_const_iterator(const _Bit_iterator& __x)

    : _Bit_iterator_base(__x._M_p, __x._M_offset) { }

    const_reference

    operator*() const

    { return _Bit_reference(_M_p, 1UL << _M_offset); }

    const_iterator&

    operator++()

    {

      _M_bump_up();

      return *this;

    }

    const_iterator

    operator++(int)

    {

      const_iterator __tmp = *this;

      _M_bump_up();

      return __tmp;

    }

    const_iterator&

    operator--()

    {

      _M_bump_down();

      return *this;

    }

    const_iterator

    operator--(int)

    {

      const_iterator __tmp = *this;

      _M_bump_down();

      return __tmp;

    }

    const_iterator&

    operator+=(difference_type __i)

    {

      _M_incr(__i);

      return *this;

    }

    const_iterator&

    operator-=(difference_type __i)

    {

      *this += -__i;

      return *this;

    }

    const_iterator

    operator+(difference_type __i) const

    {

      const_iterator __tmp = *this;

      return __tmp += __i;

    }

    const_iterator

    operator-(difference_type __i) const

    {

      const_iterator __tmp = *this;

      return __tmp -= __i;

    }

    const_reference

    operator[](difference_type __i) const

    { return *(*this + __i); }

  };

  inline _Bit_const_iterator

  operator+(ptrdiff_t __n, const _Bit_const_iterator& __x)

  { return __x + __n; }

  inline void

  __fill_bvector(_Bit_iterator __first, _Bit_iterator __last, bool __x)

  {

    for (; __first != __last; ++__first)

      *__first = __x;

  }

  inline void

  fill(_Bit_iterator __first, _Bit_iterator __last, const bool& __x)

  {

    if (__first._M_p != __last._M_p)

      {

        std::fill(__first._M_p + 1, __last._M_p, __x ? ~0 : 0);

        __fill_bvector(__first, _Bit_iterator(__first._M_p + 1, 0), __x);

        __fill_bvector(_Bit_iterator(__last._M_p, 0), __last, __x);

      }

    else

      __fill_bvector(__first, __last, __x);

  }

  template<typename _Alloc>

    struct _Bvector_base

    {

      typedef typename _Alloc::template rebind<_Bit_type>::other

        _Bit_alloc_type;

      struct _Bvector_impl

      : public _Bit_alloc_type

      {

        _Bit_iterator   _M_start;

        _Bit_iterator   _M_finish;

        _Bit_type*      _M_end_of_storage;

        _Bvector_impl()

        : _Bit_alloc_type(), _M_start(), _M_finish(), _M_end_of_storage(0)

        { }

        _Bvector_impl(const _Bit_alloc_type& __a)

        : _Bit_alloc_type(__a), _M_start(), _M_finish(), _M_end_of_storage(0)

        { }

      };

    public:

      typedef _Alloc allocator_type;

      _Bit_alloc_type&

      _M_get_Bit_allocator()

      { return *static_cast<_Bit_alloc_type*>(&this->_M_impl); }

      const _Bit_alloc_type&

      _M_get_Bit_allocator() const

      { return *static_cast<const _Bit_alloc_type*>(&this->_M_impl); }

      allocator_type

      get_allocator() const

      { return allocator_type(_M_get_Bit_allocator()); }

      _Bvector_base()

      : _M_impl() { }

      _Bvector_base(const allocator_type& __a)

      : _M_impl(__a) { }

#ifdef __GXX_EXPERIMENTAL_CXX0X__

      _Bvector_base(_Bvector_base&& __x)

      : _M_impl(__x._M_get_Bit_allocator())

      {

        this->_M_impl._M_start = __x._M_impl._M_start;

        this->_M_impl._M_finish = __x._M_impl._M_finish;

        this->_M_impl._M_end_of_storage = __x._M_impl._M_end_of_storage;

        __x._M_impl._M_start = _Bit_iterator();

        __x._M_impl._M_finish = _Bit_iterator();

        __x._M_impl._M_end_of_storage = 0;

      }

#endif

      ~_Bvector_base()

      { this->_M_deallocate(); }

    protected:

      _Bvector_impl _M_impl;

      _Bit_type*

      _M_allocate(size_t __n)

      { return _M_impl.allocate((__n + int(_S_word_bit) - 1)

                                / int(_S_word_bit)); }

      void

      _M_deallocate()

      {

        if (_M_impl._M_start._M_p)

          _M_impl.deallocate(_M_impl._M_start._M_p,

                             _M_impl._M_end_of_storage - _M_impl._M_start._M_p);

      }

    };

_GLIBCXX_END_NESTED_NAMESPACE

// Declare a partial specialization of vector<T, Alloc>.

#include <bits/stl_vector.h>

_GLIBCXX_BEGIN_NESTED_NAMESPACE(std, _GLIBCXX_STD_D)

  /**

   *  @brief  A specialization of vector for booleans which offers fixed time

   *  access to individual elements in any order.

   *

   *  Note that vector<bool> does not actually meet the requirements for being

   *  a container.  This is because the reference and pointer types are not

   *  really references and pointers to bool.  See DR96 for details.  @see

   *  vector for function documentation.

   *

   *  @ingroup sequences

   *

   *  In some terminology a %vector can be described as a dynamic

   *  C-style array, it offers fast and efficient access to individual

   *  elements in any order and saves the user from worrying about

   *  memory and size allocation.  Subscripting ( @c [] ) access is

   *  also provided as with C-style arrays.

  */

template<typename _Alloc>

  class vector<bool, _Alloc> : protected _Bvector_base<_Alloc>

  {

    typedef _Bvector_base<_Alloc>                        _Base;

#ifdef __GXX_EXPERIMENTAL_CXX0X__

    template<typename> friend class hash;

#endif

  public:

    typedef bool                                         value_type;

    typedef size_t                                       size_type;

    typedef ptrdiff_t                                    difference_type;

    typedef _Bit_reference                               reference;

    typedef bool                                         const_reference;

    typedef _Bit_reference*                              pointer;

    typedef const bool*                                  const_pointer;

    typedef _Bit_iterator                                iterator;

    typedef _Bit_const_iterator                          const_iterator;

    typedef std::reverse_iterator<const_iterator>        const_reverse_iterator;

    typedef std::reverse_iterator<iterator>              reverse_iterator;

    typedef _Alloc                                       allocator_type;

    allocator_type get_allocator() const

    { return _Base::get_allocator(); }

  protected:

    using _Base::_M_allocate;

    using _Base::_M_deallocate;

    using _Base::_M_get_Bit_allocator;

  public:

    vector()

    : _Base() { }

    explicit

    vector(const allocator_type& __a)

    : _Base(__a) { }

    explicit

    vector(size_type __n, const bool& __value = bool(),

           const allocator_type& __a = allocator_type())

    : _Base(__a)

    {

      _M_initialize(__n);

      std::fill(this->_M_impl._M_start._M_p, this->_M_impl._M_end_of_storage,

                __value ? ~0 : 0);

    }

    vector(const vector& __x)

    : _Base(__x._M_get_Bit_allocator())

    {

      _M_initialize(__x.size());

      _M_copy_aligned(__x.begin(), __x.end(), this->_M_impl._M_start);

    }

#ifdef __GXX_EXPERIMENTAL_CXX0X__

    vector(vector&& __x)

    : _Base(std::forward<_Base>(__x)) { }

    vector(initializer_list<bool> __l,

           const allocator_type& __a = allocator_type())

    : _Base(__a)

    {

      _M_initialize_range(__l.begin(), __l.end(),

                          random_access_iterator_tag());

    }

#endif

    template<typename _InputIterator>

      vector(_InputIterator __first, _InputIterator __last,

             const allocator_type& __a = allocator_type())

      : _Base(__a)

      {

        typedef typename std::__is_integer<_InputIterator>::__type _Integral;

        _M_initialize_dispatch(__first, __last, _Integral());

      }

    ~vector() { }

    vector&

    operator=(const vector& __x)

    {

      if (&__x == this)

        return *this;

      if (__x.size() > capacity())

        {

          this->_M_deallocate();

          _M_initialize(__x.size());

        }

      this->_M_impl._M_finish = _M_copy_aligned(__x.begin(), __x.end(),

                                                begin());

      return *this;

    }

#ifdef __GXX_EXPERIMENTAL_CXX0X__

    vector&

    operator=(vector&& __x)

    {

      // NB: DR 1204.

      // NB: DR 675.

      this->clear();

      this->swap(__x);

      return *this;

    }

    vector&

    operator=(initializer_list<bool> __l)

    {

      this->assign (__l.begin(), __l.end());

      return *this;

    }

#endif

    // assign(), a generalized assignment member function.  Two

    // versions: one that takes a count, and one that takes a range.

    // The range version is a member template, so we dispatch on whether

    // or not the type is an integer.

    void

    assign(size_type __n, const bool& __x)

    { _M_fill_assign(__n, __x); }

    template<typename _InputIterator>

      void

      assign(_InputIterator __first, _InputIterator __last)

      {

        typedef typename std::__is_integer<_InputIterator>::__type _Integral;

        _M_assign_dispatch(__first, __last, _Integral());

      }

#ifdef __GXX_EXPERIMENTAL_CXX0X__

    void

    assign(initializer_list<bool> __l)

    { this->assign(__l.begin(), __l.end()); }

#endif

    iterator

    begin()

    { return this->_M_impl._M_start; }

    const_iterator

    begin() const

    { return this->_M_impl._M_start; }

    iterator

    end()

    { return this->_M_impl._M_finish; }

    const_iterator

    end() const

    { return this->_M_impl._M_finish; }

    reverse_iterator

    rbegin()

    { return reverse_iterator(end()); }

    const_reverse_iterator

    rbegin() const

    { return const_reverse_iterator(end()); }

    reverse_iterator

    rend()

    { return reverse_iterator(begin()); }

    const_reverse_iterator

    rend() const

    { return const_reverse_iterator(begin()); }

#ifdef __GXX_EXPERIMENTAL_CXX0X__

    const_iterator

    cbegin() const

    { return this->_M_impl._M_start; }

    const_iterator

    cend() const

    { return this->_M_impl._M_finish; }

    const_reverse_iterator

    crbegin() const

    { return const_reverse_iterator(end()); }

    const_reverse_iterator

    crend() const

    { return const_reverse_iterator(begin()); }

#endif

    size_type

    size() const

    { return size_type(end() - begin()); }

    size_type

    max_size() const

    {

      const size_type __isize =

        __gnu_cxx::__numeric_traits<difference_type>::__max

        - int(_S_word_bit) + 1;

      const size_type __asize = _M_get_Bit_allocator().max_size();

      return (__asize <= __isize / int(_S_word_bit)

              ? __asize * int(_S_word_bit) : __isize);

    }

    size_type

    capacity() const

    { return size_type(const_iterator(this->_M_impl._M_end_of_storage, 0)

                       - begin()); }

    bool

    empty() const

    { return begin() == end(); }

    reference

    operator[](size_type __n)

    {

      return *iterator(this->_M_impl._M_start._M_p

                       + __n / int(_S_word_bit), __n % int(_S_word_bit));

    }

    const_reference

    operator[](size_type __n) const

    {

      return *const_iterator(this->_M_impl._M_start._M_p

                             + __n / int(_S_word_bit), __n % int(_S_word_bit));

    }

  protected:

    void

    _M_range_check(size_type __n) const

    {

      if (__n >= this->size())

        __throw_out_of_range(__N("vector<bool>::_M_range_check"));