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59 lines
1.1 KiB
C++
59 lines
1.1 KiB
C++
#pragma once
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//
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// FILE: Adler32.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.2.5
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// DATE: 2022-01-27
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// PURPOSE: Arduino Library for calculating Adler-32 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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#include "Arduino.h"
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#define ADLER32_LIB_VERSION (F("0.2.5"))
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// largest prime below 2^16
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const uint32_t ADLER32_MOD_PRIME = 65521;
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class Adler32
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{
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public:
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Adler32();
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void begin(uint32_t s1 = 1, uint32_t s2 = 0);
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void add(uint8_t value);
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// returns current Adler value
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uint32_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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uint32_t addFast(uint8_t * array, uint16_t length);
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// wrappers for char array's / strings
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void add(char value);
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// returns current Adler value
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uint32_t add(char * array, uint16_t length);
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// returns current Adler value
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uint32_t addFast(char * array, uint16_t length);
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uint32_t getAdler();
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uint32_t count();
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private:
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uint32_t _s1;
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uint32_t _s2;
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uint32_t _count;
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};
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// -- END OF FILE --
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