70 lines
2.0 KiB
C++
70 lines
2.0 KiB
C++
/*
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Copyright 2008 Intel Corporation
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Use, modification and distribution are subject to the Boost Software License,
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Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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http://www.boost.org/LICENSE_1_0.txt).
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*/
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#ifndef BOOST_POLYGON_ITERATOR_COMPACT_TO_POINTS_HPP
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#define BOOST_POLYGON_ITERATOR_COMPACT_TO_POINTS_HPP
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namespace boost { namespace polygon{
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template <typename iterator_type, typename point_type>
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class iterator_compact_to_points {
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private:
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iterator_type iter_;
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iterator_type iter_end_;
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point_type pt_;
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typename point_traits<point_type>::coordinate_type firstX_;
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orientation_2d orient_;
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public:
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typedef std::forward_iterator_tag iterator_category;
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typedef point_type value_type;
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typedef std::ptrdiff_t difference_type;
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typedef const point_type* pointer; //immutable
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typedef const point_type& reference; //immutable
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inline iterator_compact_to_points() : iter_(), iter_end_(), pt_(), firstX_(), orient_() {}
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inline iterator_compact_to_points(iterator_type iter, iterator_type iter_end) :
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iter_(iter), iter_end_(iter_end), pt_(), firstX_(), orient_(HORIZONTAL) {
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if(iter_ != iter_end_) {
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firstX_ = *iter_;
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x(pt_, firstX_);
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++iter_;
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if(iter_ != iter_end_) {
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y(pt_, *iter_);
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}
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}
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}
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//use bitwise copy and assign provided by the compiler
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inline iterator_compact_to_points& operator++() {
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iterator_type prev_iter = iter_;
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++iter_;
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if(iter_ == iter_end_) {
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if(x(pt_) != firstX_) {
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iter_ = prev_iter;
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x(pt_, firstX_);
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}
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} else {
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set(pt_, orient_, *iter_);
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orient_.turn_90();
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}
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return *this;
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}
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inline const iterator_compact_to_points operator++(int) {
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iterator_compact_to_points tmp(*this);
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++(*this);
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return tmp;
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}
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inline bool operator==(const iterator_compact_to_points& that) const {
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return (iter_ == that.iter_);
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}
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inline bool operator!=(const iterator_compact_to_points& that) const {
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return (iter_ != that.iter_);
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}
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inline reference operator*() const { return pt_; }
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};
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}
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}
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#endif
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