// Copyright (C)2018-2023, Philip Munts dba Munts Technologies.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
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//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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namespace Interfaces::Temperature
{
  extern const double AbsoluteZero  = -273.15;
  extern const double FreezingPoint = 0.0;
  extern const double BoilingPoint  = 100.0;

  // Temperature conversion routines

  double C_to_F(double T)  // Celsius to Fahrenheit
  {
    return T*9.0/5.0 + 32.0;
  }

  double C_to_K(double T)  // Celsius to Kelvins
  {
    return T - AbsoluteZero;
  }

  double F_to_C(double T)  // Fahrenheit to Celsius
  {
    return (T - 32.0)*5.0/9.0;
  }

  double F_to_K(double T)  // Fahrenheit to Kelvins
  {
    return (T + 459.67)*5.0/9.0;
  }

  double K_to_C(double T)  // Kelvins to Celsius
  {
    return T + AbsoluteZero;
  }

  double K_to_F(double T)  // Kelvins to Fahrenheit
  {
    return T*9.0/5.0 - 459.67;
  }
}