isfinite.hpp

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// SPDX-License-Identifier: BSL-1.0
// SPDX-FileCopyrightText: Copyright (C) 2019 Tobias Hienzsch
 
#ifndef TETL_CMATH_ISFINITE_HPP
#define TETL_CMATH_ISFINITE_HPP
 
#include <etl/_cmath/isinf.hpp>
#include <etl/_cmath/isnan.hpp>
 
namespace etl {
 
/// Determines if the given floating point number arg has finite value
/// i.e. it is normal, subnormal or zero, but not infinite or NaN.
/// \details https://en.cppreference.com/w/cpp/numeric/math/isfinite
/// \ingroup cmath
[[nodiscard]] constexpr auto isfinite(float arg) -> bool
{
    return not etl::isnan(arg) and not etl::isinf(arg);
}
 
/// \ingroup cmath
[[nodiscard]] constexpr auto isfinite(double arg) -> bool
{
    return not etl::isnan(arg) and not etl::isinf(arg);
}
 
/// \ingroup cmath
[[nodiscard]] constexpr auto isfinite(long double arg) -> bool
{
    return not etl::isnan(arg) and not etl::isinf(arg);
}
 
} // namespace etl
 
#endif // TETL_CMATH_ISFINITE_HPP