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48 lines
957 B
C++
48 lines
957 B
C++
#pragma once
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//
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// FILE: LUHN.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.1
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// DATE: 2022-12-24
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// PURPOSE: Arduino Library for calculating LUHN checksum.
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// URL: https://github.com/RobTillaart/LUHN
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#include "Arduino.h"
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#define LUHN_LIB_VERSION (F("0.1.1"))
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class LUHN
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{
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public:
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LUHN();
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// CHECK
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// buffer == \0 terminated
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bool isValid(const char * buffer);
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bool isValid(char * buffer);
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char generateChecksum(char * buffer);
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// GENERATE A PRODUCT ID WITH LUHN CHECKSUM
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void randomize(uint32_t a, uint32_t b);
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bool generate(char * buffer, uint8_t length, char * prefix);
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// STREAM INTERFACE
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char add(char c);
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char reset();
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protected:
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uint32_t m_w = 1; // random generator parameter
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uint32_t m_z = 2; // random generator parameter
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uint8_t Marsaglia_mod10();
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uint8_t _luhn = 0;
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uint16_t _count = 0;
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};
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// -- END OF FILE --
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