GY-63_MS5611/libraries/float16/float16.h

#pragma once
//
//    FILE: float16.h
//  AUTHOR: Rob Tillaart
// VERSION: 0.1.8
// PURPOSE: Arduino library to implement float16 data type.
//          half-precision floating point format,
//          used for efficient storage and transport.
//     URL: https://github.com/RobTillaart/float16


#include "Arduino.h"

#define FLOAT16_LIB_VERSION                 (F("0.1.8"))


class float16: public Printable
{
public:
  //  Constructors
  float16(void)               { _value = 0x0000; };
  float16(double f);
  float16(const float16 &f)   { _value = f._value; };

  //  Conversion
  double   toDouble(void) const;
  //  access the 2 byte representation.
  uint16_t getBinary()           { return _value; };
  void     setBinary(uint16_t u) { _value = u; };

  //  Printable
  size_t   printTo(Print& p) const;
  void     setDecimals(uint8_t d) { _decimals = d; };
  uint8_t  getDecimals()          { return _decimals; };

  //  equalities
  bool operator == (const float16& f);
  bool operator != (const float16& f);

  bool operator >  (const float16& f);
  bool operator >= (const float16& f);
  bool operator <  (const float16& f);
  bool operator <= (const float16& f);

  //  negation
  float16 operator - ();

  //  basic math
  float16 operator + (const float16& f);
  float16 operator - (const float16& f);
  float16 operator * (const float16& f);
  float16 operator / (const float16& f);

  float16& operator += (const float16& f);
  float16& operator -= (const float16& f);
  float16& operator *= (const float16& f);
  float16& operator /= (const float16& f);

  //  math helper functions
  int   sign();       //  1 = positive   0 = zero   -1 = negative.
  bool  isZero();
  bool isNaN();
  bool isInf();


  //  CORE CONVERSION
  //  should be private but for testing...
  float    f16tof32(uint16_t) const;
  uint16_t f32tof16(float) const;


private:
  uint8_t  _decimals = 4;
  uint16_t _value;

};


//  -- END OF FILE --