trace_directions.hpp

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// -----------------------------------------------------------------------------------------------------
// Copyright (c) 2006-2021, Knut Reinert & Freie Universität Berlin
// Copyright (c) 2016-2021, 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   = 0b00010,
    up        = 0b00100,
    left_open = 0b01000,
    left      = 0b10000
};
 
} // 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