adler32.h

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// 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