fm_index_cursor.hpp

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// -----------------------------------------------------------------------------------------------------
// Copyright (c) 2006-2022, Knut Reinert & Freie Universität Berlin
// Copyright (c) 2016-2022, Knut Reinert & MPI für molekulare Genetik
// This file may be used, modified and/or redistributed under the terms of the 3-clause BSD-License
// shipped with this file and also available at: https://github.com/seqan/seqan3/blob/master/LICENSE.md
// -----------------------------------------------------------------------------------------------------
 
#pragma once
 
#include <tuple>
#include <type_traits>
 
#include <seqan3/core/concept/cereal.hpp>
 
namespace seqan3::detail
{
 
template <typename index_t>
struct fm_index_cursor_node
{
    using size_type = typename index_t::size_type;
    using sdsl_char_type = typename index_t::sdsl_char_type;
 
    size_type lb;
    size_type rb;
    size_type depth;
    sdsl_char_type last_char;
 
    bool operator==(fm_index_cursor_node const & rhs) const
    {
        // NOTE: last_char is implementation specific for cycle_back().
        // lb, rb and depth already determine the node in the suffix tree.
        // Thus there is no need to compare last_char.
        return std::tie(lb, rb, depth) == std::tie(rhs.lb, rhs.rb, rhs.depth);
    }
 
    bool operator!=(fm_index_cursor_node const & rhs) const
    {
        return !(*this == rhs);
    }
 
    template <cereal_archive archive_t>
    void CEREAL_SERIALIZE_FUNCTION_NAME(archive_t & archive)
    {
        archive(lb);
        archive(rb);
        archive(depth);
        archive(last_char);
    }
};
 
} // namespace seqan3::detail