fast_mod.hpp

#ifndef LIBSBX_UTILITY_FAST_MOD_HPP_
#define LIBSBX_UTILITY_FAST_MOD_HPP_
 
#include <concepts>
#include <cmath>
 
namespace sbx::utility {
 
template<std::unsigned_integral Type>
constexpr auto fast_mod(const Type value, const Type modulus) noexcept -> Type {
  // return value - (value / modulus) * modulus;
  return value < modulus ? value : value % modulus;
}
 
template<std::floating_point Type>
constexpr auto fast_mod(const Type value, const Type modulus) noexcept -> Type {
  // return value - (value / modulus) * modulus;
  return value < modulus ? value : std::fmod(value, modulus);
}
 
} // namespace sbx::utility
 
#endif // LIBSBX_UTILITY_FAST_MOD_HPP_