82 lines
2.1 KiB
C++
82 lines
2.1 KiB
C++
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/// @file dpf/subinterval_iterable.hpp
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/// @author Ryan Henry <ryan.henry@ucalgary.ca>
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/// @brief defines `dpf::subinterval_iterable` and associated helpers
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/// @copyright Copyright (c) 2019-2024 Ryan Henry and [others](@ref authors)
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/// @license Released under a GNU General Public v2.0 (GPLv2) license;
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/// see [LICENSE.md](@ref license) for details.
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#ifndef LIBDPF_INCLUDE_DPF_SUBINTERVAL_ITERABLE_HPP__
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#define LIBDPF_INCLUDE_DPF_SUBINTERVAL_ITERABLE_HPP__
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#include <cstddef>
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#include "hedley/hedley.h"
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namespace dpf
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{
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template <typename ChildT,
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typename WordT>
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class setbit_index_iterable; // forward declaration
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template <typename IteratorT>
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class subinterval_iterable
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{
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public:
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using iterator = IteratorT;
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using size_type = std::size_t;
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HEDLEY_NO_THROW
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HEDLEY_ALWAYS_INLINE
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explicit subinterval_iterable(iterator it, size_type buf_size, size_type from, size_type to, size_type preclip, size_type outputs_per_leaf, bool nonempty = true) noexcept
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: it_{it}, buf_size_{buf_size}, from_{from}, to_{to},
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length_{nonempty ? to_ - from_ : 0}, preclip_{preclip},
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outputs_{outputs_per_leaf}, nonempty_{nonempty}
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{ }
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HEDLEY_NO_THROW
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HEDLEY_ALWAYS_INLINE
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iterator begin() const noexcept
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{
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return it_ + preclip_;
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}
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HEDLEY_NO_THROW
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HEDLEY_ALWAYS_INLINE
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iterator cbegin() const noexcept
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{
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return it_ + preclip_;
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}
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HEDLEY_NO_THROW
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HEDLEY_ALWAYS_INLINE
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iterator end() const noexcept
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{
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if (!nonempty_)
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return it_ + preclip_;
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return it_ + preclip_ + length_ + 1;
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}
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HEDLEY_NO_THROW
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HEDLEY_ALWAYS_INLINE
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iterator cend() const noexcept
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{
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return end();
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}
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private:
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iterator it_;
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size_type buf_size_;
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size_type from_;
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size_type to_;
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size_type length_;
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size_type preclip_;
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size_type outputs_;
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bool nonempty_;
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template <typename ChildT,
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typename WordT>
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friend class setbit_index_iterable;
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}; // class dpf::subinterval_iterable
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} // namespace dpf
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#endif // LIBDPF_INCLUDE_DPF_SUBINTERVAL_ITERABLE_HPP__
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