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76 lines
1.9 KiB
C++
76 lines
1.9 KiB
C++
#pragma once
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//
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// FILE: float16ext.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.2.0
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// PURPOSE: Arduino library to implement float16ext data type.
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// half-precision floating point format,
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// used for efficient storage and transport.
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// URL: https://github.com/RobTillaart/float16ext
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#include "Arduino.h"
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#define FLOAT16EXT_LIB_VERSION (F("0.2.0"))
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class float16ext
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{
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public:
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// Constructors
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float16ext(void) { _value = 0x0000; };
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float16ext(double f);
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float16ext(const float16ext &f) { _value = f._value; };
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// Conversion and printing
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double toDouble(void) const;
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float toFloat() const;
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String toString(unsigned int decimals = 2) const; // keep esp32 happy.
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// access the 2 byte representation.
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uint16_t getBinary() { return _value; };
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void setBinary(uint16_t u) { _value = u; };
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// equalities
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bool operator == (const float16ext& f);
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bool operator != (const float16ext& f);
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bool operator > (const float16ext& f);
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bool operator >= (const float16ext& f);
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bool operator < (const float16ext& f);
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bool operator <= (const float16ext& f);
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// negation
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float16ext operator - ();
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// basic math
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float16ext operator + (const float16ext& f);
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float16ext operator - (const float16ext& f);
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float16ext operator * (const float16ext& f);
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float16ext operator / (const float16ext& f);
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float16ext& operator += (const float16ext& f);
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float16ext& operator -= (const float16ext& f);
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float16ext& operator *= (const float16ext& f);
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float16ext& operator /= (const float16ext& f);
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// math helper functions
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int sign(); // 1 = positive 0 = zero -1 = negative.
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bool isZero();
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// CORE CONVERSION
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// should be private, needed for testing.
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float f16tof32(uint16_t) const;
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uint16_t f32tof16(float) const;
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private:
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uint16_t _value;
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};
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// -- END OF FILE --
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