to_lower.hpp

// -----------------------------------------------------------------------------------------------------
// Copyright (c) 2022 deCODE Genetics
// Copyright (c) 2006-2020, Knut Reinert & Freie Universität Berlin
// Copyright (c) 2016-2020, 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/biocpp/biocpp-core/blob/main/LICENSE.md
// -----------------------------------------------------------------------------------------------------
 
#pragma once
 
#include <bio/core.hpp>
 
namespace bio::alphabet::detail
{
 
constexpr bool is_lower(char const c)
{
    return (c >= 'a' && c <= 'z');
}
 
constexpr bool is_upper(char const c)
{
    return (c >= 'A' && c <= 'Z');
}
 
constexpr char to_lower(char const c)
{
    return static_cast<char>(static_cast<unsigned char>(c) | 0b0010'0000);
}
 
constexpr char to_upper(char const c)
{
    return static_cast<char>(static_cast<unsigned char>(c) & 0b0101'1111);
}
 
} // namespace bio::alphabet::detail