struct SPStyle {
	float value;
	float computed;
};
template < typename _Iterator, typename _Container > class __normal_iterator {
	_Iterator _M_current;
      public:explicit __normal_iterator(const _Iterator & __i):_M_current(__i)
	{
	}
	const _Iterator & base() const {
		return _M_current;
}};
template < typename _IteratorL, typename _IteratorR,
    typename _Container > inline int operator-(const __normal_iterator <
					       _IteratorL, _Container > &__lhs,
					       const __normal_iterator <
					       _IteratorR, _Container > &__rhs)
{
	return __lhs.base() - __rhs.base();
}

template < typename _Tp > class allocator {
};
template < typename _Tp, typename _Alloc > struct _Vector_base {
	struct _Vector_impl {
		_Tp *_M_start;
		_Tp *_M_finish;
	};
      public: _Vector_impl _M_impl;
};
template < typename _Tp, typename _Alloc = allocator < _Tp > >class vector:protected _Vector_base < _Tp,
    _Alloc >
{
      public:typedef __normal_iterator < const _Tp *,
	    void >const_iterator;
	unsigned int size() const {
		return const_iterator(this->_M_impl._M_finish) -
		    const_iterator(this->_M_impl._M_start);
	} const _Tp & operator[] (unsigned int __n)const {
}};
class Layout {
      public:class iterator;
	iterator end() const;
	unsigned lineIndex(iterator const &) const;
	struct Chunk;
	struct Character {
		Chunk const &chunk(Layout const *l) const {
	}};
	struct Chunk {
		unsigned in_line;
	};
	 vector < Character > _characters;
};
class Layout::iterator {
      public:unsigned _char_index;
	iterator(Layout const *p, unsigned c, int g):_char_index(c) {
}};
inline Layout::iterator Layout::end() const
{
	return iterator(this, _characters.size(), _characters.size());
}
inline unsigned Layout::lineIndex(iterator const &it) const
{
	return it._char_index ==
	    _characters.size()? 1 : _characters[0].chunk(this).in_line;
};
void sp_te_adjust_linespacing_screen(double by)
{
	Layout *layout;
	SPStyle *style;
	unsigned line_count = layout->lineIndex(layout->end());
	double all_lines_height;
	double average_line_height = all_lines_height / line_count;
	if (style->computed)
		style->computed = by;
	else
		style->computed = (average_line_height) / average_line_height;
	if (style->value)
		style->value = by;
	else
		style->value = (average_line_height) / average_line_height;
}