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// Profiling unordered_set/unordered_multiset implementation -*- C++ -*-

// Copyright (C) 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 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.

/** @file profile/unordered_set
 *  This file is a GNU profile extension to the Standard C++ Library.
 */

#ifndef _GLIBCXX_PROFILE_UNORDERED_SET
#define _GLIBCXX_PROFILE_UNORDERED_SET 1

#ifndef __GXX_EXPERIMENTAL_CXX0X__
# include <bits/c++0x_warning.h>
#else
# include <unordered_set>

#include <profile/base.h>

#define _GLIBCXX_BASE unordered_set<_Key, _Hash, _Pred, _Alloc>
#define _GLIBCXX_STD_BASE _GLIBCXX_STD_PR::_GLIBCXX_BASE

namespace std
{
namespace __profile
{
  /** @brief Unordered_set wrapper with performance instrumentation.  */
  template<typename _Key, 
           typename _Hash  = std::hash<_Key>,
           typename _Pred = std::equal_to<_Key>,
           typename _Alloc =  std::allocator<_Key> >
    class unordered_set
    : public _GLIBCXX_STD_BASE
    {
      typedef typename _GLIBCXX_STD_BASE _Base;

    public:
      typedef typename _Base::size_type       size_type;
      typedef typename _Base::hasher          hasher;
      typedef typename _Base::key_equal       key_equal;
      typedef typename _Base::allocator_type  allocator_type;
      typedef typename _Base::key_type        key_type;
      typedef typename _Base::value_type      value_type;
      typedef typename _Base::difference_type difference_type;
      typedef typename _Base::reference       reference;
      typedef typename _Base::const_reference const_reference;

      typedef typename _Base::iterator iterator;
      typedef typename _Base::const_iterator const_iterator;

      explicit
      unordered_set(size_type __n = 10,
                    const hasher& __hf = hasher(),
                    const key_equal& __eql = key_equal(),
                    const allocator_type& __a = allocator_type())
      : _Base(__n, __hf, __eql, __a)
      {
        __profcxx_hashtable_construct(this, _Base::bucket_count());
        __profcxx_hashtable_construct2(this);
      }

      template<typename _InputIterator>
        unordered_set(_InputIterator __f, _InputIterator __l,
              size_type __n = 10,
              const hasher& __hf = hasher(),
              const key_equal& __eql = key_equal(),
              const allocator_type& __a = allocator_type())
      : _Base(__f, __l, __n, __hf, __eql, __a)
      {
        __profcxx_hashtable_construct(this, _Base::bucket_count());
        __profcxx_hashtable_construct2(this);
      }

      unordered_set(const _Base& __x)
      : _Base(__x) 
      { 
        __profcxx_hashtable_construct(this, _Base::bucket_count());
        __profcxx_hashtable_construct2(this);
      }

      unordered_set(unordered_set&& __x)
      : _Base(std::forward<_Base>(__x)) 
      { 
        __profcxx_hashtable_construct(this, _Base::bucket_count());
        __profcxx_hashtable_construct2(this);
      }

      unordered_set(initializer_list<value_type> __l,
                    size_type __n = 10,
                    const hasher& __hf = hasher(),
                    const key_equal& __eql = key_equal(),
                    const allocator_type& __a = allocator_type())
      : _Base(__l, __n, __hf, __eql, __a) { }

      unordered_set&
      operator=(const unordered_set& __x)
      {
        *static_cast<_Base*>(this) = __x;
        return *this;
      }

      unordered_set&
      operator=(unordered_set&& __x)
      {
        // NB: DR 1204.
        // NB: DR 675.
        this->clear();
        this->swap(__x);
        return *this;
      }

      unordered_set&
      operator=(initializer_list<value_type> __l)
      {
        this->clear();
        this->insert(__l);
        return *this;
      }

      ~unordered_set()
      {
        __profcxx_hashtable_destruct(this, _Base::bucket_count(), 
                                     _Base::size());
        _M_profile_destruct();
      }

      void
      swap(unordered_set& __x)
      {
        _Base::swap(__x);
      }

      void
      clear()
      {
        __profcxx_hashtable_destruct(this, _Base::bucket_count(), 
                                     _Base::size());
        _M_profile_destruct();
        _Base::clear();
      }

      void
      insert(std::initializer_list<value_type> __l)
      { 
        size_type __old_size =  _Base::bucket_count();
        _Base::insert(__l); 
        _M_profile_resize(__old_size,  _Base::bucket_count()); 
      }

      std::pair<iterator, bool>
      insert(const value_type& __obj)
      {
        size_type __old_size =  _Base::bucket_count();
        std::pair<iterator, bool> __res = _Base::insert(__obj);
        _M_profile_resize(__old_size,  _Base::bucket_count()); 
        return __res;
      }

      iterator
      insert(const_iterator __iter, const value_type& __v)
      { 
        size_type __old_size = _Base::bucket_count(); 
        iterator __res = _Base::insert(__iter, __v);
        _M_profile_resize(__old_size, _Base::bucket_count()); 
        return __res;
      }

      template<typename _InputIter>
        void
        insert(_InputIter __first, _InputIter __last)
        {
          size_type __old_size = _Base::bucket_count(); 
          _Base::insert(__first, __last);
          _M_profile_resize(__old_size,  _Base::bucket_count()); 
        }

      void
      insert(const value_type* __first, const value_type* __last)
      {
        size_type __old_size = _Base::bucket_count(); 
        _Base::insert(__first, __last);
        _M_profile_resize(__old_size,  _Base::bucket_count()); 
      }
     
      void rehash(size_type __n)
      {
        size_type __old_size =  _Base::bucket_count();
        _Base::rehash(__n);
        _M_profile_resize(__old_size,  _Base::bucket_count()); 
      }

    private:
      _Base&
      _M_base()       { return *this; }

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

      void
      _M_profile_resize(size_type __old_size, size_type __new_size)
      {
        if (__old_size != __new_size)
          __profcxx_hashtable_resize(this, __old_size, __new_size);
      }

      void
      _M_profile_destruct()
      {
        size_type __hops = 0, __lc = 0, __chain = 0;
        for (iterator __it = _M_base().begin(); __it != _M_base().end();
             ++__it)
        {
          while (__it._M_cur_node->_M_next)
            {
              ++__chain;
              ++__it;
            }

          if (__chain)
            {
              ++__chain;
              __lc = __lc > __chain ? __lc : __chain;
              __hops += __chain * (__chain - 1) / 2;
              __chain = 0;
            }
        }
        __profcxx_hashtable_destruct2(this, __lc,  _Base::size(), __hops);
      }

   };

  template<typename _Value, typename _Hash, typename _Pred, typename _Alloc>
    inline void
    swap(unordered_set<_Value, _Hash, _Pred, _Alloc>& __x,
         unordered_set<_Value, _Hash, _Pred, _Alloc>& __y)
    { __x.swap(__y); }

  template<typename _Value, typename _Hash, typename _Pred, typename _Alloc>
    inline bool
    operator==(const unordered_set<_Value, _Hash, _Pred, _Alloc>& __x,
               const unordered_set<_Value, _Hash, _Pred, _Alloc>& __y)
    { return __x._M_equal(__y); }

  template<typename _Value, typename _Hash, typename _Pred, typename _Alloc>
    inline bool
    operator!=(const unordered_set<_Value, _Hash, _Pred, _Alloc>& __x,
               const unordered_set<_Value, _Hash, _Pred, _Alloc>& __y)
    { return !(__x == __y); }

#undef _GLIBCXX_BASE
#undef _GLIBCXX_STD_BASE
#define _GLIBCXX_STD_BASE _GLIBCXX_STD_PR::_GLIBCXX_BASE
#define _GLIBCXX_BASE unordered_multiset<_Value, _Hash, _Pred, _Alloc>

  /** @brief Unordered_multiset wrapper with performance instrumentation.  */
  template<typename _Value,
       typename _Hash  = std::hash<_Value>,
       typename _Pred = std::equal_to<_Value>,
       typename _Alloc =  std::allocator<_Value> >
    class unordered_multiset
    : public _GLIBCXX_STD_BASE
    {
      typedef typename _GLIBCXX_STD_BASE _Base;

    public:
      typedef typename _Base::size_type       size_type;
      typedef typename _Base::hasher          hasher;
      typedef typename _Base::key_equal       key_equal;
      typedef typename _Base::allocator_type  allocator_type;
      typedef typename _Base::key_type        key_type;
      typedef typename _Base::value_type      value_type;
      typedef typename _Base::difference_type difference_type;
      typedef typename _Base::reference       reference;
      typedef typename _Base::const_reference const_reference;

      typedef typename _Base::iterator iterator;
      typedef typename _Base::const_iterator const_iterator;

      explicit
      unordered_multiset(size_type __n = 10,
                    const hasher& __hf = hasher(),
                    const key_equal& __eql = key_equal(),
                    const allocator_type& __a = allocator_type())
      : _Base(__n, __hf, __eql, __a)
      {
        __profcxx_hashtable_construct(this, _Base::bucket_count());
      }

      template<typename _InputIterator>
        unordered_multiset(_InputIterator __f, _InputIterator __l,
              size_type __n = 10,
              const hasher& __hf = hasher(),
              const key_equal& __eql = key_equal(),
              const allocator_type& __a = allocator_type())
      : _Base(__f, __l, __n, __hf, __eql, __a)
      {
        __profcxx_hashtable_construct(this, _Base::bucket_count());
      }

      unordered_multiset(const _Base& __x)
      : _Base(__x)
      {
        __profcxx_hashtable_construct(this, _Base::bucket_count());
      }

      unordered_multiset(unordered_multiset&& __x)
      : _Base(std::forward<_Base>(__x))
      {
        __profcxx_hashtable_construct(this, _Base::bucket_count());
      }

      unordered_multiset(initializer_list<value_type> __l,
                         size_type __n = 10,
                         const hasher& __hf = hasher(),
                         const key_equal& __eql = key_equal(),
                         const allocator_type& __a = allocator_type())
      : _Base(__l, __n, __hf, __eql, __a) { }

      unordered_multiset&
      operator=(const unordered_multiset& __x)
      {
        *static_cast<_Base*>(this) = __x;
        return *this;
      }

      unordered_multiset&
      operator=(unordered_multiset&& __x)
      {
        // NB: DR 1204.
        // NB: DR 675.
        this->clear();
        this->swap(__x);
        return *this;
      }

      unordered_multiset&
      operator=(initializer_list<value_type> __l)
      {
        this->clear();
        this->insert(__l);
        return *this;
      }

      ~unordered_multiset()
      {
        __profcxx_hashtable_destruct(this, _Base::bucket_count(), 
                                     _Base::size());
        _M_profile_destruct();
      }

      void
      swap(unordered_multiset& __x)
      {
        _Base::swap(__x);
      }

      void
      clear()
      {
        __profcxx_hashtable_destruct(this, _Base::bucket_count(), 
                                     _Base::size());
        _M_profile_destruct();
        _Base::clear();
      }

      void
      insert(std::initializer_list<value_type> __l)
      { 
        size_type __old_size =  _Base::bucket_count();
        _Base::insert(__l); 
        _M_profile_resize(__old_size,  _Base::bucket_count()); 
      }

      iterator
      insert(const value_type& __obj)
      {
        size_type __old_size =  _Base::bucket_count();
        iterator __res = _Base::insert(__obj);
        _M_profile_resize(__old_size,  _Base::bucket_count()); 
        return __res;
      }

      iterator
      insert(const_iterator __iter, const value_type& __v)
      { 
        size_type __old_size = _Base::bucket_count(); 
        iterator __res = _Base::insert(__iter, __v);
        _M_profile_resize(__old_size, _Base::bucket_count()); 
        return __res;
      }

      template<typename _InputIter>
        void
        insert(_InputIter __first, _InputIter __last)
        {
          size_type __old_size = _Base::bucket_count(); 
          _Base::insert(__first, __last);
          _M_profile_resize(__old_size,  _Base::bucket_count()); 
        }

      void
      insert(const value_type* __first, const value_type* __last)
      {
        size_type __old_size = _Base::bucket_count(); 
        _Base::insert(__first, __last);
        _M_profile_resize(__old_size,  _Base::bucket_count()); 
      }
     
      void rehash(size_type __n)
      {
        size_type __old_size =  _Base::bucket_count();
        _Base::rehash(__n);
        _M_profile_resize(__old_size,  _Base::bucket_count()); 
      }

    private:
      _Base&
      _M_base()       { return *this; }

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

      void
      _M_profile_resize(size_type __old_size, size_type __new_size)
      {
        if (__old_size != __new_size)
          __profcxx_hashtable_resize(this, __old_size, __new_size);
      }

      void
      _M_profile_destruct()
      {
        size_type __hops = 0, __lc = 0, __chain = 0;
        for (iterator __it = _M_base().begin(); __it != _M_base().end();
             ++__it)
        {
          while (__it._M_cur_node->_M_next)
            {
             ++__chain;
             ++__it;
            }

          if (__chain)
            {
              ++__chain;
              __lc = __lc > __chain ? __lc : __chain;
              __hops += __chain * (__chain - 1) / 2;
              __chain = 0;
            }
        }
        __profcxx_hashtable_destruct2(this, __lc,  _Base::size(), __hops);
      }

   };

  template<typename _Value, typename _Hash, typename _Pred, typename _Alloc>
    inline void
    swap(unordered_multiset<_Value, _Hash, _Pred, _Alloc>& __x,
         unordered_multiset<_Value, _Hash, _Pred, _Alloc>& __y)
    { __x.swap(__y); }

  template<typename _Value, typename _Hash, typename _Pred, typename _Alloc>
    inline bool
    operator==(const unordered_multiset<_Value, _Hash, _Pred, _Alloc>& __x,
               const unordered_multiset<_Value, _Hash, _Pred, _Alloc>& __y)
    { return __x._M_equal(__y); }

  template<typename _Value, typename _Hash, typename _Pred, typename _Alloc>
    inline bool
    operator!=(const unordered_multiset<_Value, _Hash, _Pred, _Alloc>& __x,
               const unordered_multiset<_Value, _Hash, _Pred, _Alloc>& __y)
    { return !(__x == __y); }

} // namespace __profile
} // namespace std

#undef _GLIBCXX_BASE
#undef _GLIBCXX_STD_BASE

#endif // __GXX_EXPERIMENTAL_CXX0X__

#endif