Equals.hpp

Go to the documentation of this file.

// Copyright (c) 2023 Sapphire development team. All Rights Reserved.
 
#pragma once
 
#ifndef SAPPHIRE_MATHS_EQUALS_GUARD
#define SAPPHIRE_MATHS_EQUALS_GUARD
 
#include <limits>
 
namespace SA
{
    namespace Maths
    {
        template <typename T, typename EpsT = T>
        constexpr bool Equals(const T& _lhs, const T& _rhs, EpsT _epsilon = std::numeric_limits<EpsT>::epsilon())
        {
            // Don't use std::abs for unsigned compatibility.
 
            return (_lhs < _rhs ? _rhs - _lhs : _lhs - _rhs) <= _epsilon;
        }
 
 
        template <typename T, typename EpsT = T>
        constexpr bool Equals0(T _in, EpsT _epsilon = std::numeric_limits<EpsT>::epsilon()) noexcept
        {
            return Equals(_in, T{ 0 }, _epsilon);
        }
 
 
        template <typename T, typename EpsT = T>
        constexpr bool Equals1(T _in, EpsT _epsilon = std::numeric_limits<EpsT>::epsilon()) noexcept
        {
            return Equals(_in, T{ 1 }, _epsilon);
        }
    }
}
 
#endif // GUARD