delta.hpp

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// SPDX-License-Identifier: BSD-2-Clause
 
#ifndef pRC_CORE_VALUE_FUNCTIONS_DELTA_H
#define pRC_CORE_VALUE_FUNCTIONS_DELTA_H
 
#include <prc/core/value/functions/abs.hpp>
#include <prc/core/value/functions/greater_equal.hpp>
#include <prc/core/value/functions/sub.hpp>
#include <prc/core/value/value.hpp>
 
namespace pRC
{
    template<IsValue TA, IsValue TB>
    static inline constexpr auto delta(TA const &a, TB const &b)
    {
        return abs(a - b);
    }
 
    template<IsValue TA, IsValue TB>
        requires IsUnsignedInteger<TA> || IsUnsignedInteger<TB>
    static inline constexpr auto delta(TA const &a, TB const &b)
    {
        return a >= b ? (a - b) : (b - a);
    }
}
#endif // pRC_CORE_VALUE_FUNCTIONS_DELTA_H