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// Debugging deque implementation -*- C++ -*-

// Copyright (C) 2003, 2004, 2005
// 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// 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.

#ifndef _GLIBCXX_DEBUG_DEQUE
#define _GLIBCXX_DEBUG_DEQUE 1

#include <deque>
#include <debug/safe_sequence.h>
#include <debug/safe_iterator.h>

namespace __gnu_debug_def
{
  template<typename _Tp, typename _Allocator = std::allocator<_Tp> >
    class deque
    : public _GLIBCXX_STD::deque<_Tp, _Allocator>,
      public __gnu_debug::_Safe_sequence<deque<_Tp, _Allocator> >
    {
      typedef  _GLIBCXX_STD::deque<_Tp, _Allocator> _Base;
      typedef __gnu_debug::_Safe_sequence<deque> _Safe_base;

    public:
      typedef typename _Base::reference             reference;
      typedef typename _Base::const_reference       const_reference;

      typedef __gnu_debug::_Safe_iterator<typename _Base::iterator,deque>
                                                    iterator;
      typedef __gnu_debug::_Safe_iterator<typename _Base::const_iterator,deque>
                                                     const_iterator;

      typedef typename _Base::size_type             size_type;
      typedef typename _Base::difference_type       difference_type;

      typedef _Tp                                   value_type;
      typedef _Allocator                            allocator_type;
      typedef typename _Base::pointer               pointer;
      typedef typename _Base::const_pointer         const_pointer;
      typedef std::reverse_iterator<iterator>       reverse_iterator;
      typedef std::reverse_iterator<const_iterator> const_reverse_iterator;

      // 23.2.1.1 construct/copy/destroy:
      explicit deque(const _Allocator& __a = _Allocator())
      : _Base(__a) { }

      explicit deque(size_type __n, const _Tp& __value = _Tp(),
                     const _Allocator& __a = _Allocator())
      : _Base(__n, __value, __a) { }

      template<class _InputIterator>
        deque(_InputIterator __first, _InputIterator __last,
              const _Allocator& __a = _Allocator())
        : _Base(__gnu_debug::__check_valid_range(__first, __last), __last, __a)
        { }

      deque(const deque<_Tp,_Allocator>& __x) : _Base(__x), _Safe_base() { }

      deque(const _Base& __x) : _Base(__x), _Safe_base() { }

      ~deque() { }

      deque<_Tp,_Allocator>&
      operator=(const deque<_Tp,_Allocator>& __x)
      {
        *static_cast<_Base*>(this) = __x;
        this->_M_invalidate_all();
        return *this;
      }

      template<class _InputIterator>
        void
        assign(_InputIterator __first, _InputIterator __last)
        {
          __glibcxx_check_valid_range(__first, __last);
          _Base::assign(__first, __last);
          this->_M_invalidate_all();
        }

      void
      assign(size_type __n, const _Tp& __t)
      {
        _Base::assign(__n, __t);
        this->_M_invalidate_all();
      }

      using _Base::get_allocator;

      // iterators:
      iterator
      begin()
      { return iterator(_Base::begin(), this); }

      const_iterator
      begin() const
      { return const_iterator(_Base::begin(), this); }

      iterator
      end()
      { return iterator(_Base::end(), this); }

      const_iterator
      end() const
      { return const_iterator(_Base::end(), this); }

      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()); }

      // 23.2.1.2 capacity:
      using _Base::size;
      using _Base::max_size;

      void
      resize(size_type __sz, _Tp __c = _Tp())
      {
        typedef typename _Base::const_iterator _Base_const_iterator;
        typedef __gnu_debug::_After_nth_from<_Base_const_iterator> _After_nth;

        bool __invalidate_all = __sz > this->size();
        if (__sz < this->size())
          this->_M_invalidate_if(_After_nth(__sz, _M_base().begin()));

        _Base::resize(__sz, __c);

        if (__invalidate_all)
          this->_M_invalidate_all();
      }

      using _Base::empty;

      // element access:
      reference
      operator[](size_type __n)
      {
        __glibcxx_check_subscript(__n);
        return _M_base()[__n];
      }

      const_reference
      operator[](size_type __n) const
      {
        __glibcxx_check_subscript(__n);
        return _M_base()[__n];
      }

      using _Base::at;

      reference
      front()
      {
        __glibcxx_check_nonempty();
        return _Base::front();
      }

      const_reference
      front() const
      {
        __glibcxx_check_nonempty();
        return _Base::front();
      }

      reference
      back()
      {
        __glibcxx_check_nonempty();
        return _Base::back();
      }

      const_reference
      back() const
      {
        __glibcxx_check_nonempty();
        return _Base::back();
      }

      // 23.2.1.3 modifiers:
      void
      push_front(const _Tp& __x)
      {
        _Base::push_front(__x);
        this->_M_invalidate_all();
      }

      void
      push_back(const _Tp& __x)
      {
        _Base::push_back(__x);
        this->_M_invalidate_all();
      }

      iterator
      insert(iterator __position, const _Tp& __x)
      {
        __glibcxx_check_insert(__position);
        typename _Base::iterator __res = _Base::insert(__position.base(), __x);
        this->_M_invalidate_all();
        return iterator(__res, this);
      }

      void
      insert(iterator __position, size_type __n, const _Tp& __x)
      {
        __glibcxx_check_insert(__position);
        _Base::insert(__position.base(), __n, __x);
        this->_M_invalidate_all();
      }

      template<class _InputIterator>
        void
        insert(iterator __position,
               _InputIterator __first, _InputIterator __last)
        {
          __glibcxx_check_insert_range(__position, __first, __last);
          _Base::insert(__position.base(), __first, __last);
          this->_M_invalidate_all();
        }

      void
      pop_front()
      {
        __glibcxx_check_nonempty();
        iterator __victim = begin();
        __victim._M_invalidate();
        _Base::pop_front();
      }

      void
      pop_back()
      {
        __glibcxx_check_nonempty();
        iterator __victim = end();
        --__victim;
        __victim._M_invalidate();
        _Base::pop_back();
      }

      iterator
      erase(iterator __position)
      {
        __glibcxx_check_erase(__position);
        if (__position == begin() || __position == end()-1)
          {
            __position._M_invalidate();
            return iterator(_Base::erase(__position.base()), this);
          }
        else
          {
            typename _Base::iterator __res = _Base::erase(__position.base());
            this->_M_invalidate_all();
            return iterator(__res, this);
          }
      }

      iterator
      erase(iterator __first, iterator __last)
      {
        // _GLIBCXX_RESOLVE_LIB_DEFECTS
        // 151. can't currently clear() empty container
        __glibcxx_check_erase_range(__first, __last);
        if (__first == begin() || __last == end())
          {
            this->_M_detach_singular();
            for (iterator __position = __first; __position != __last; )
              {
                iterator __victim = __position++;
                __victim._M_invalidate();
              }
            try
              {
                return iterator(_Base::erase(__first.base(), __last.base()),
                                this);
              }
            catch (...)
              {
                this->_M_revalidate_singular();
                __throw_exception_again;
              }
          }
        else
          {
            typename _Base::iterator __res = _Base::erase(__first.base(),
                                                          __last.base());
            this->_M_invalidate_all();
            return iterator(__res, this);
          }
      }

      void
      swap(deque<_Tp,_Allocator>& __x)
      {
        _Base::swap(__x);
        this->_M_swap(__x);
      }

      void
      clear()
      {
        _Base::clear();
        this->_M_invalidate_all();
      }

      _Base&
      _M_base()       { return *this; }

      const _Base&
      _M_base() const { return *this; }
    };

  template<typename _Tp, typename _Alloc>
    inline bool
    operator==(const deque<_Tp, _Alloc>& __lhs,
               const deque<_Tp, _Alloc>& __rhs)
    { return __lhs._M_base() == __rhs._M_base(); }

  template<typename _Tp, typename _Alloc>
    inline bool
    operator!=(const deque<_Tp, _Alloc>& __lhs,
               const deque<_Tp, _Alloc>& __rhs)
    { return __lhs._M_base() != __rhs._M_base(); }

  template<typename _Tp, typename _Alloc>
    inline bool
    operator<(const deque<_Tp, _Alloc>& __lhs, const deque<_Tp, _Alloc>& __rhs)
    { return __lhs._M_base() < __rhs._M_base(); }

  template<typename _Tp, typename _Alloc>
    inline bool
    operator<=(const deque<_Tp, _Alloc>& __lhs,
               const deque<_Tp, _Alloc>& __rhs)
    { return __lhs._M_base() <= __rhs._M_base(); }

  template<typename _Tp, typename _Alloc>
    inline bool
    operator>=(const deque<_Tp, _Alloc>& __lhs,
               const deque<_Tp, _Alloc>& __rhs)
    { return __lhs._M_base() >= __rhs._M_base(); }

  template<typename _Tp, typename _Alloc>
    inline bool
    operator>(const deque<_Tp, _Alloc>& __lhs, const deque<_Tp, _Alloc>& __rhs)
    { return __lhs._M_base() > __rhs._M_base(); }

  template<typename _Tp, typename _Alloc>
    inline void
    swap(deque<_Tp, _Alloc>& __lhs, deque<_Tp, _Alloc>& __rhs)
    { __lhs.swap(__rhs); }
} // namespace __gnu_debug_def

#endif