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#pragma once
#include <cmath>
#include <type_traits>
#include "macros.hpp"
namespace util_detail {
template<typename n>
inline auto clamp_float(n val, n min_, n max_)
{
return std::fmin(std::fmax(val, min_), max_);
}
template<typename t, typename n>
struct clamp final
{
static inline auto clamp_(const n& val, const n& min_, const n& max_)
{
if (unlikely(val > max_))
return max_;
if (unlikely(val < min_))
return min_;
return val;
}
};
template<typename t>
struct clamp<float, t>
{
static inline auto clamp_(float val, float min_, float max_)
{
return clamp_float(val, min_, max_);
}
};
template<typename t>
struct clamp<double, t>
{
static inline auto clamp_(double val, double min_, double max_)
{
return clamp_float(val, min_, max_);
}
};
} // ns util_detail
template<typename t, typename u, typename w>
inline auto clamp(const t& val, const u& min, const w& max)
{
using tp = decltype(val + min + max);
return ::util_detail::clamp<std::decay_t<tp>, tp>::clamp_(val, min, max);
}
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