trace_directions.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 <seqan3/core/add_enum_bitwise_operators.hpp>
#include <seqan3/core/debug_stream/debug_stream_type.hpp>
 
namespace seqan3::detail
{
 
enum struct trace_directions : uint8_t
{
    none = 0b00000,
    diagonal = 0b00001,
    up_open = 0b00110,
    up = 0b00100,
    left_open = 0b11000,
    left = 0b10000,
    carry_up_open = 0b00010,
    carry_left_open = 0b01000
};
 
} // namespace seqan3::detail
 
namespace seqan3
{
template <>
constexpr bool add_enum_bitwise_operators<seqan3::detail::trace_directions> = true;
 
template <typename char_t>
inline debug_stream_type<char_t> & operator<<(debug_stream_type<char_t> & s, detail::trace_directions const trace)
{
    static char const * unicode[32]{"↺",   "↖",    "↑",   "↖↑",  "⇡",    "↖⇡",   "↑⇡",  "↖↑⇡",  "←",    "↖←",   "↑←",
                                    "↖↑←", "⇡←",   "↖⇡←", "↑⇡←", "↖↑⇡←", "⇠",    "↖⇠",  "↑⇠",   "↖↑⇠",  "⇡⇠",   "↖⇡⇠",
                                    "↑⇡⇠", "↖↑⇡⇠", "←⇠",  "↖←⇠", "↑←⇠",  "↖↑←⇠", "⇡←⇠", "↖⇡←⇠", "↑⇡←⇠", "↖↑⇡←⇠"};
 
    static char const * csv[32]{"N",   "D",    "U",   "DU",  "u",    "Du",   "Uu",  "DUu",  "L",    "DL",   "UL",
                                "DUL", "uL",   "DuL", "UuL", "DUuL", "l",    "Dl",  "Ul",   "DUl",  "ul",   "Dul",
                                "Uul", "DUul", "Ll",  "DLl", "ULl",  "DULl", "uLl", "DuLl", "UuLl", "DUuLl"};
 
    bool is_unicode = (s.flags2() & fmtflags2::utf8) == fmtflags2::utf8;
    auto const & trace_dir = is_unicode ? unicode : csv;
 
    s << trace_dir[static_cast<size_t>(trace)];
    return s;
}
 
} // namespace seqan3