Altitude.hpp

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#pragma once
 
#include <concepts>
#include <cstdint>
#include <span>
#include <type_traits>
#include <vector>
 
namespace mmcfilters {
 
namespace detail {
 
template <class T>
inline constexpr bool SupportedIntegralAltitude = std::is_integral_v<std::remove_cv_t<T>> && sizeof(std::remove_cv_t<T>) < sizeof(std::int64_t);
 
template <class T> inline constexpr bool SupportedFloatingAltitude = std::is_floating_point_v<std::remove_cv_t<T>>;
 
} // namespace detail
 
template <class T>
concept AltitudeValue =
    std::totally_ordered<T> && !std::is_same_v<std::remove_cv_t<T>, bool> && (detail::SupportedFloatingAltitude<T> || detail::SupportedIntegralAltitude<T>);
 
template <AltitudeValue T> using NodeAltitudeSpan = std::span<const T>;
 
namespace detail {
 
template <AltitudeValue T> struct AltitudeDifferenceSelector {
    using type = std::conditional_t<std::is_integral_v<T>, std::int64_t, T>;
};
 
} // namespace detail
 
template <AltitudeValue T> using AltitudeDifference = typename detail::AltitudeDifferenceSelector<T>::type;
 
template <AltitudeValue T> using NodeAltitudeBuffer = std::vector<T>;
 
} // namespace mmcfilters