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#ifndef theplu_yat_utility_cigar_iterator |
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#define theplu_yat_utility_cigar_iterator |
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// $Id$ |
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/* |
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Copyright (C) 2014, 2015, 2016, 2018 Peter Johansson |
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This file is part of the yat library, http://dev.thep.lu.se/yat |
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|
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The yat library is free software; you can redistribute it and/or |
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modify it under the terms of the GNU General Public License as |
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published by the Free Software Foundation; either version 3 of the |
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License, or (at your option) any later version. |
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The yat library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with yat. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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#include "Cigar.h" |
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|
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#include <boost/concept_check.hpp> |
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#include <boost/cstdint.hpp> |
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#include <boost/iterator/iterator_facade.hpp> |
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#include <boost/iterator/iterator_categories.hpp> |
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#include <boost/iterator/iterator_concepts.hpp> |
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|
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#include <cstddef> // for size_t |
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|
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namespace theplu { |
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namespace yat { |
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namespace utility { |
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|
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/** |
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\brief Iterator over a CIGAR |
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|
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A CIGAR string is typically represented as a compact array, i.e., |
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an array \c MMMMMMDDMMMM is represented as \c 6M2D4M. This class |
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is a proxy that allows iterating over a CIGAR as though the array |
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was \c MMMMMMDDMMMM. |
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CigarIterator is a \readable_iterator (not mutable) and |
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models a \bidirectional_traversal_iterator. Its value_type is \c |
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uint8_t. Since no \c uint8_t is stored in CIGAR, the dereference |
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operator calculates the CIGAR element to return and returns by |
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value. CigarIterator is therefore an \input_iterator. |
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Type Requirement: |
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- \c BASE is a \readable_iterator |
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- \c BASE is a \bidirectional_traversal_iterator |
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|
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\since New in yat 0.13 |
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*/ |
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template<typename BASE> |
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class CigarIterator |
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: public boost::iterator_facade< |
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CigarIterator<BASE>, uint8_t |
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, boost::bidirectional_traversal_tag, const uint8_t> |
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{ |
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public: |
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/** |
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\brief Default constructor |
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*/ |
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CigarIterator(void); |
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|
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/** |
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Construct an iterator that points to element offset in \a p. If |
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\a p corresponds to \c 5M and offset is 2, the iterator points to |
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the third \c M. |
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*/ |
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explicit CigarIterator(BASE p, size_t offset=0); |
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/** |
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\return underlying iterator |
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*/ |
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BASE base(void) const; |
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private: |
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friend class boost::iterator_core_access; |
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|
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BASE base_; |
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size_t index_; |
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|
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void decrement(void); |
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uint8_t dereference(void) const; |
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bool equal(const CigarIterator& other) const; |
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void increment(void); |
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|
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// using compiler generated copy |
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//CigarIterator(const CigarIterator& other); |
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//CigarIterator& operator=(const CigarIterator&); |
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}; |
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|
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//// implementation ///////////// |
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template<typename BASE> |
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CigarIterator<BASE>::CigarIterator(void) |
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{ |
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BOOST_CONCEPT_ASSERT((boost_concepts::ReadableIterator<BASE>)); |
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BOOST_CONCEPT_ASSERT((boost_concepts::BidirectionalTraversal<BASE>)); |
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} |
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template<typename BASE> |
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CigarIterator<BASE>::CigarIterator(BASE b, size_t x) |
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: base_(b), index_(x) |
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{ |
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BOOST_CONCEPT_ASSERT((boost_concepts::ReadableIterator<BASE>)); |
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BOOST_CONCEPT_ASSERT((boost_concepts::BidirectionalTraversal<BASE>)); |
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} |
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template<typename BASE> |
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BASE CigarIterator<BASE>::base(void) const |
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{ |
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return base_; |
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} |
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|
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template<typename BASE> |
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void CigarIterator<BASE>::decrement(void) |
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{ |
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if (index_) |
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--index_; |
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else { |
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--base_; |
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index_ = bam_cigar_oplen(*base_)-1; |
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} |
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} |
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template<typename BASE> |
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uint8_t CigarIterator<BASE>::dereference(void) const |
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{ |
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return bam_cigar_op(*base_); |
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} |
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template<typename BASE> |
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bool CigarIterator<BASE>::equal(const CigarIterator& other) const |
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{ |
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return base_==other.base_ && index_==other.index_; |
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} |
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template<typename BASE> |
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void CigarIterator<BASE>::increment(void) |
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{ |
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if (++index_ == bam_cigar_oplen(*base_)) { |
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index_=0; |
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++base_; |
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} |
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} |
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}}} |
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#endif |