hashtable.h

从FFMPEG转换而来的H264解码程序,VC下编译..

      ++_M_num_elements;
      return pair<iterator, bool>(iterator(__tmp, this), true);
    }

  template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
    typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::iterator
    hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::
    insert_equal_noresize(const value_type& __obj)
    {
      const size_type __n = _M_bkt_num(__obj);
      _Node* __first = _M_buckets[__n];

      for (_Node* __cur = __first; __cur; __cur = __cur->_M_next)
	if (_M_equals(_M_get_key(__cur->_M_val), _M_get_key(__obj)))
	  {
	    _Node* __tmp = _M_new_node(__obj);
	    __tmp->_M_next = __cur->_M_next;
	    __cur->_M_next = __tmp;
	    ++_M_num_elements;
	    return iterator(__tmp, this);
	  }

      _Node* __tmp = _M_new_node(__obj);
      __tmp->_M_next = __first;
      _M_buckets[__n] = __tmp;
      ++_M_num_elements;
      return iterator(__tmp, this);
    }

  template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
    typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::reference
    hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::
    find_or_insert(const value_type& __obj)
    {
      resize(_M_num_elements + 1);

      size_type __n = _M_bkt_num(__obj);
      _Node* __first = _M_buckets[__n];

      for (_Node* __cur = __first; __cur; __cur = __cur->_M_next)
	if (_M_equals(_M_get_key(__cur->_M_val), _M_get_key(__obj)))
	  return __cur->_M_val;

      _Node* __tmp = _M_new_node(__obj);
      __tmp->_M_next = __first;
      _M_buckets[__n] = __tmp;
      ++_M_num_elements;
      return __tmp->_M_val;
    }

  template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
    pair<typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::iterator,
	 typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::iterator>
    hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::
    equal_range(const key_type& __key)
    {
      typedef pair<iterator, iterator> _Pii;
      const size_type __n = _M_bkt_num_key(__key);

      for (_Node* __first = _M_buckets[__n]; __first;
	   __first = __first->_M_next)
	if (_M_equals(_M_get_key(__first->_M_val), __key))
	  {
	    for (_Node* __cur = __first->_M_next; __cur;
		 __cur = __cur->_M_next)
	      if (!_M_equals(_M_get_key(__cur->_M_val), __key))
		return _Pii(iterator(__first, this), iterator(__cur, this));
	    for (size_type __m = __n + 1; __m < _M_buckets.size(); ++__m)
	      if (_M_buckets[__m])
		return _Pii(iterator(__first, this),
			    iterator(_M_buckets[__m], this));
	    return _Pii(iterator(__first, this), end());
	  }
      return _Pii(end(), end());
    }

  template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
    pair<typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::const_iterator,
	 typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::const_iterator>
    hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::
    equal_range(const key_type& __key) const
    {
      typedef pair<const_iterator, const_iterator> _Pii;
      const size_type __n = _M_bkt_num_key(__key);

      for (const _Node* __first = _M_buckets[__n]; __first;
	   __first = __first->_M_next)
	{
	  if (_M_equals(_M_get_key(__first->_M_val), __key))
	    {
	      for (const _Node* __cur = __first->_M_next; __cur;
		   __cur = __cur->_M_next)
		if (!_M_equals(_M_get_key(__cur->_M_val), __key))
		  return _Pii(const_iterator(__first, this),
			      const_iterator(__cur, this));
	      for (size_type __m = __n + 1; __m < _M_buckets.size(); ++__m)
		if (_M_buckets[__m])
		  return _Pii(const_iterator(__first, this),
			      const_iterator(_M_buckets[__m], this));
	      return _Pii(const_iterator(__first, this), end());
	    }
	}
      return _Pii(end(), end());
    }

  template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
    typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::size_type
    hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::
    erase(const key_type& __key)
    {
      const size_type __n = _M_bkt_num_key(__key);
      _Node* __first = _M_buckets[__n];
      size_type __erased = 0;

      if (__first)
	{
	  _Node* __cur = __first;
	  _Node* __next = __cur->_M_next;
	  while (__next)
	    {
	      if (_M_equals(_M_get_key(__next->_M_val), __key))
		{
		  __cur->_M_next = __next->_M_next;
		  _M_delete_node(__next);
		  __next = __cur->_M_next;
		  ++__erased;
		  --_M_num_elements;
		}
	      else
		{
		  __cur = __next;
		  __next = __cur->_M_next;
		}
	    }
	  if (_M_equals(_M_get_key(__first->_M_val), __key))
	    {
	      _M_buckets[__n] = __first->_M_next;
	      _M_delete_node(__first);
	      ++__erased;
	      --_M_num_elements;
	    }
	}
      return __erased;
    }

  template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
    void hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::
    erase(const iterator& __it)
    {
      _Node* __p = __it._M_cur;
      if (__p)
	{
	  const size_type __n = _M_bkt_num(__p->_M_val);
	  _Node* __cur = _M_buckets[__n];

	  if (__cur == __p)
	    {
	      _M_buckets[__n] = __cur->_M_next;
	      _M_delete_node(__cur);
	      --_M_num_elements;
	    }
	  else
	    {
	      _Node* __next = __cur->_M_next;
	      while (__next)
		{
		  if (__next == __p)
		    {
		      __cur->_M_next = __next->_M_next;
		      _M_delete_node(__next);
		      --_M_num_elements;
		      break;
		    }
		  else
		    {
		      __cur = __next;
		      __next = __cur->_M_next;
		    }
		}
	    }
	}
    }

  template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
    void
    hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::
    erase(iterator __first, iterator __last)
    {
      size_type __f_bucket = __first._M_cur ? _M_bkt_num(__first._M_cur->_M_val)
	                                    : _M_buckets.size();

      size_type __l_bucket = __last._M_cur ? _M_bkt_num(__last._M_cur->_M_val)
	                                   : _M_buckets.size();

      if (__first._M_cur == __last._M_cur)
	return;
      else if (__f_bucket == __l_bucket)
	_M_erase_bucket(__f_bucket, __first._M_cur, __last._M_cur);
      else
	{
	  _M_erase_bucket(__f_bucket, __first._M_cur, 0);
	  for (size_type __n = __f_bucket + 1; __n < __l_bucket; ++__n)
	    _M_erase_bucket(__n, 0);
	  if (__l_bucket != _M_buckets.size())
	    _M_erase_bucket(__l_bucket, __last._M_cur);
	}
    }

  template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
    inline void
    hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::
    erase(const_iterator __first, const_iterator __last)
    {
      erase(iterator(const_cast<_Node*>(__first._M_cur),
		     const_cast<hashtable*>(__first._M_ht)),
	    iterator(const_cast<_Node*>(__last._M_cur),
		     const_cast<hashtable*>(__last._M_ht)));
    }

  template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
    inline void
    hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::
    erase(const const_iterator& __it)
    { erase(iterator(const_cast<_Node*>(__it._M_cur),
		     const_cast<hashtable*>(__it._M_ht))); }

  template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
    void
    hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::
    resize(size_type __num_elements_hint)
    {
      const size_type __old_n = _M_buckets.size();
      if (__num_elements_hint > __old_n)
	{
	  const size_type __n = _M_next_size(__num_elements_hint);
	  if (__n > __old_n)
	    {
	      _Vector_type __tmp(__n, (_Node*)(0), _M_buckets.get_allocator());
	      try
		{
		  for (size_type __bucket = 0; __bucket < __old_n; ++__bucket)
		    {
		      _Node* __first = _M_buckets[__bucket];
		      while (__first)
			{
			  size_type __new_bucket = _M_bkt_num(__first->_M_val,
							      __n);
			  _M_buckets[__bucket] = __first->_M_next;
			  __first->_M_next = __tmp[__new_bucket];
			  __tmp[__new_bucket] = __first;
			  __first = _M_buckets[__bucket];
			}
		    }
		  _M_buckets.swap(__tmp);
		}
	      catch(...)
		{
		  for (size_type __bucket = 0; __bucket < __tmp.size();
		       ++__bucket)
		    {
		      while (__tmp[__bucket])
			{
			  _Node* __next = __tmp[__bucket]->_M_next;
			  _M_delete_node(__tmp[__bucket]);
			  __tmp[__bucket] = __next;
			}
		    }
		  __throw_exception_again;
		}
	    }
	}
    }

  template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
    void
    hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::
    _M_erase_bucket(const size_type __n, _Node* __first, _Node* __last)
    {
      _Node* __cur = _M_buckets[__n];
      if (__cur == __first)
	_M_erase_bucket(__n, __last);
      else
	{
	  _Node* __next;
	  for (__next = __cur->_M_next;
	       __next != __first;
	       __cur = __next, __next = __cur->_M_next)
	    ;
	  while (__next != __last)
	    {
	      __cur->_M_next = __next->_M_next;
	      _M_delete_node(__next);
	      __next = __cur->_M_next;
	      --_M_num_elements;
	    }
	}
    }

  template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
    void
    hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::
    _M_erase_bucket(const size_type __n, _Node* __last)
    {
      _Node* __cur = _M_buckets[__n];
      while (__cur != __last)
	{
	  _Node* __next = __cur->_M_next;
	  _M_delete_node(__cur);
	  __cur = __next;
	  _M_buckets[__n] = __cur;
	  --_M_num_elements;
	}
    }

  template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
    void
    hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::
    clear()
    {
      for (size_type __i = 0; __i < _M_buckets.size(); ++__i)
	{
	  _Node* __cur = _M_buckets[__i];
	  while (__cur != 0)
	    {
	      _Node* __next = __cur->_M_next;
	      _M_delete_node(__cur);
	      __cur = __next;
	    }
	  _M_buckets[__i] = 0;
	}
      _M_num_elements = 0;
    }

  template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
    void
    hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::
    _M_copy_from(const hashtable& __ht)
    {
      _M_buckets.clear();
      _M_buckets.reserve(__ht._M_buckets.size());
      _M_buckets.insert(_M_buckets.end(), __ht._M_buckets.size(), (_Node*) 0);
      try
	{
	  for (size_type __i = 0; __i < __ht._M_buckets.size(); ++__i) {
	    const _Node* __cur = __ht._M_buckets[__i];
	    if (__cur)
	      {
		_Node* __local_copy = _M_new_node(__cur->_M_val);
		_M_buckets[__i] = __local_copy;

		for (_Node* __next = __cur->_M_next;
		     __next;
		     __cur = __next, __next = __cur->_M_next)
		  {
		    __local_copy->_M_next = _M_new_node(__next->_M_val);
		    __local_copy = __local_copy->_M_next;
		  }
	      }
	  }
	  _M_num_elements = __ht._M_num_elements;
	}
      catch(...)
	{
	  clear();
	  __throw_exception_again;
	}
    }
} // namespace __gnu_cxx

#undef try
#undef catch
#undef __throw_exception_again

#pragma warning(pop)

#endif