~zooko/cryptopp/trunk

#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;}

    static 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