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author | vrouvrea <vrouvrea@636b058d-ea47-450e-bf9e-a15bfbe3eedb> | 2017-03-03 14:41:33 +0000 |
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committer | vrouvrea <vrouvrea@636b058d-ea47-450e-bf9e-a15bfbe3eedb> | 2017-03-03 14:41:33 +0000 |
commit | efe1965d052815f0534e1baefa5d15b65e67d82b (patch) | |
tree | e0ba28511109a3beadc1e95fa346a7ecea9dc0f2 /src/Witness_complex/include/gudhi/Active_witness/Active_witness_iterator.h | |
parent | d357b3bf12430d5d1ccd03fed58966155bd8826c (diff) | |
parent | effc4723dfa2604c8c505b0dfff48b4cab8012ca (diff) |
Merge last trunk modificatinos
make sphinx depends on cython target
git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/ST_cythonize@2155 636b058d-ea47-450e-bf9e-a15bfbe3eedb
Former-commit-id: ebb1709872963ffd30a6d31ab596f2715ca14436
Diffstat (limited to 'src/Witness_complex/include/gudhi/Active_witness/Active_witness_iterator.h')
-rw-r--r-- | src/Witness_complex/include/gudhi/Active_witness/Active_witness_iterator.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/src/Witness_complex/include/gudhi/Active_witness/Active_witness_iterator.h b/src/Witness_complex/include/gudhi/Active_witness/Active_witness_iterator.h new file mode 100644 index 00000000..0a05173a --- /dev/null +++ b/src/Witness_complex/include/gudhi/Active_witness/Active_witness_iterator.h @@ -0,0 +1,108 @@ +/* This file is part of the Gudhi Library. The Gudhi library + * (Geometric Understanding in Higher Dimensions) is a generic C++ + * library for computational topology. + * + * Author(s): Siargey Kachanovich + * + * Copyright (C) 2016 INRIA (France) + * + * This program 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 3 of the License, or + * (at your option) any later version. + * + * This program 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 program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef ACTIVE_WITNESS_ACTIVE_WITNESS_ITERATOR_H_ +#define ACTIVE_WITNESS_ACTIVE_WITNESS_ITERATOR_H_ + +#include <boost/iterator/iterator_facade.hpp> +#include <list> + +namespace Gudhi { + +namespace witness_complex { + +/* \brief Iterator in the nearest landmark list. + * \details After the iterator reaches the end of the list, + * the list is augmented by a (nearest landmark, distance) pair if possible. + * If all the landmarks are present in the list, iterator returns the specific end value + * of the corresponding 'Active_witness' object. + */ +template< typename Active_witness, + typename Id_distance_pair, + typename INS_iterator > +class Active_witness_iterator + : public boost::iterator_facade< Active_witness_iterator <Active_witness, Id_distance_pair, INS_iterator>, + Id_distance_pair const, + boost::forward_traversal_tag, + Id_distance_pair const> { + friend class boost::iterator_core_access; + + typedef typename std::list<Id_distance_pair>::iterator Pair_iterator; + typedef typename Gudhi::witness_complex::Active_witness_iterator<Active_witness, + Id_distance_pair, + INS_iterator> Iterator; + + Active_witness *aw_; + Pair_iterator lh_; // landmark handle + bool is_end_; // true only if the pointer is end and there are no more neighbors to add + + public: + Active_witness_iterator(Active_witness* aw) + : aw_(aw), lh_(aw_->nearest_landmark_table_.end()), is_end_(true) { + } + + Active_witness_iterator(Active_witness* aw, const Pair_iterator& lh) + : aw_(aw), lh_(lh) { + is_end_ = false; + if (lh_ == aw_->nearest_landmark_table_.end()) { + if (aw_->iterator_next_ == aw_->iterator_end_) { + is_end_ = true; + } else { + aw_->nearest_landmark_table_.push_back(*aw_->iterator_next_); + lh_ = --aw_->nearest_landmark_table_.end(); + ++(aw_->iterator_next_); + } + } + } + + private : + Id_distance_pair& dereference() const { + return *lh_; + } + + bool equal(const Iterator& other) const { + return (is_end_ == other.is_end_) || (lh_ == other.lh_); + } + + void increment() { + // the neighbor search can't be at the end iterator of a list + GUDHI_CHECK(!is_end_ && lh_ != aw_->nearest_landmark_table_.end(), + std::logic_error("Wrong active witness increment.")); + // if the id of the current landmark is the same as the last one + + lh_++; + if (lh_ == aw_->nearest_landmark_table_.end()) { + if (aw_->iterator_next_ == aw_->iterator_end_) { + is_end_ = true; + } else { + aw_->nearest_landmark_table_.push_back(*aw_->iterator_next_); + lh_ = std::prev(aw_->nearest_landmark_table_.end()); + ++(aw_->iterator_next_); + } + } + } +}; + +} // namespace witness_complex +} // namespace Gudhi + +#endif // ACTIVE_WITNESS_ACTIVE_WITNESS_ITERATOR_H_ |