// adler32.h - originally written and placed in the public domain by Wei Dai

/// \file adler32.h

/// \brief Class file for ADLER-32 checksum calculations

#ifndef CRYPTOPP_ADLER32_H

#define CRYPTOPP_ADLER32_H

#include "cryptlib.h"

NAMESPACE_BEGIN(CryptoPP)

/// ADLER-32 checksum calculations

class Adler32 : public HashTransformation

{

public:

  CRYPTOPP_CONSTANT(DIGESTSIZE = 4);

  Adler32() {Reset();}

  void Update(const byte *input, size_t length);

  void TruncatedFinal(byte *hash, size_t size);

  unsigned int DigestSize() const {return DIGESTSIZE;}

    CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "Adler32";}

    std::string AlgorithmName() const {return StaticAlgorithmName();}

private:

  void Reset() {m_s1 = 1; m_s2 = 0;}

  word16 m_s1, m_s2;

};

NAMESPACE_END

#endif