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38 lines
995 B
C
38 lines
995 B
C
#pragma once
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//
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// FILE: Fletcher.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.9
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// DATE: 2022-01-25
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// PURPOSE: Arduino Library for calculating Fletcher's checksum
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// URL: https://github.com/RobTillaart/Fletcher
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// https://en.wikipedia.org/wiki/Fletcher%27s_checksum
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#include "Arduino.h"
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#define FLETCHER_LIB_VERSION (F("0.1.9"))
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#define FLETCHER_16 255
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#define FLETCHER_32 65535UL
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#define FLETCHER_64 4294967295ULL
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//
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// straightforward implementation.
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// max length buffer 65534.
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// Wikipedia shows optimizations.
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//
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// Since 0.1.8: added parameters s1 and s2 to make functions more versatile.
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uint16_t fletcher16(uint8_t *data, uint16_t length, uint32_t s1 = 0, uint32_t s2 = 0);
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uint32_t fletcher32(uint16_t *data, uint16_t length, uint32_t s1 = 0, uint32_t s2 = 0);
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uint64_t fletcher64(uint32_t *data, uint16_t length, uint64_t s1 = 0, uint64_t s2 = 0);
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// -- END OF FILE --
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