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57 lines
1.2 KiB
C++
57 lines
1.2 KiB
C++
#pragma once
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//
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// FILE: Adler16.cpp
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// AUTHOR: Rob Tillaart
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// VERSION: 0.2.1
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// DATE: 2022-06-15
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// PURPOSE: Arduino Library for calculating Adler-16 checksum
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// URL: https://github.com/RobTillaart/Adler
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// https://en.wikipedia.org/wiki/Adler-32
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// (no Adler16 reference, implementation is experimental)
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#include "Arduino.h"
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#define ADLER16_LIB_VERSION (F("0.2.1"))
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// largest prime below 2^8
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const uint16_t ADLER16_MOD_PRIME = 251;
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class Adler16
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{
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public:
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Adler16();
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void begin(uint16_t s1 = 1, uint16_t s2 = 0);
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void add(uint8_t value);
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// returns current Adler value
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uint16_t add(uint8_t * array, uint16_t length);
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// trade PROGMEM for speed
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// returns current Adler value
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uint16_t addFast(uint8_t * array, uint16_t length);
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// wrappers for strings
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void add(char value);
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// returns current Adler value
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uint16_t add(char * array, uint16_t length);
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// returns current Adler value
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uint16_t addFast(char * array, uint16_t length);
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// returns current Adler value
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uint16_t getAdler();
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uint16_t count();
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private:
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uint16_t _s1;
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uint16_t _s2;
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uint32_t _count;
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};
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// -- END OF FILE --
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