isspace.hpp

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// SPDX-License-Identifier: BSL-1.0
// SPDX-FileCopyrightText: Copyright (C) 2020 Tobias Hienzsch
 
#ifndef TETL_CCTYPE_ISSPACE_HPP
#define TETL_CCTYPE_ISSPACE_HPP
 
namespace etl {
 
/// \brief Checks if the given character is whitespace character as classified
/// by the default C locale.
///
/// \param ch Character to classify.
///
/// \returns Non-zero value if the character is a whitespace character, zero
/// otherwise.
///
/// https://en.cppreference.com/w/cpp/string/byte/isspace
///
/// \ingroup cctype
[[nodiscard]] constexpr auto isspace(int ch) noexcept -> int
{
    auto const sp       = ch == ' ';
    auto const form     = ch == '\f';
    auto const line     = ch == '\n';
    auto const carriage = ch == '\r';
    auto const hTab     = ch == '\t';
    auto const vTab     = ch == '\v';
    return static_cast<int>(sp || form || line || carriage || hTab || vTab);
}
} // namespace etl
 
#endif // TETL_CCTYPE_ISSPACE_HPP