crc1.h

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/******************************************************************************
The MIT License(MIT)
 
Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com
 
Copyright(c) 2023 John Wellbelove
 
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#ifndef ETL_CRC1_INCLUDED
#define ETL_CRC1_INCLUDED
 
#include "platform.h"
#include "frame_check_sequence.h"
#include "binary.h"
 
namespace etl
{
  //***************************************************************************
  //***************************************************************************
  struct crc1_policy
  {
    typedef uint8_t value_type;
 
    enum
    {
      odd_parity  = 1,
      even_parity = 0
    };
 
    //*********************************
    ETL_CONSTEXPR14 value_type initial() const
    {
      return even_parity;
    }
 
    //*********************************
    ETL_CONSTEXPR14 uint8_t add(int parity, uint8_t value) const
    {
      return parity ^ etl::parity(value);
    }
 
    //*********************************
    ETL_CONSTEXPR14 uint8_t final(uint8_t parity) const
    {
      return parity;
    }
  };
 
  class crc1 : public etl::frame_check_sequence<crc1_policy>
  {
  public:
 
    enum
    {
      odd_parity  = crc1_policy::odd_parity,
      even_parity = crc1_policy::even_parity
    };
 
    //*************************************************************************
    //*************************************************************************
    ETL_CONSTEXPR14 crc1()
    {
      this->reset();
    }
 
    //*************************************************************************
    //*************************************************************************
    template<typename TIterator>
    ETL_CONSTEXPR14 crc1(TIterator begin, const TIterator end)
    {
      this->reset();
      this->add(begin, end);
    }
  };
}
 
#endif