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adler32.h

00001 #ifndef CRYPTOPP_ADLER32_H
00002 #define CRYPTOPP_ADLER32_H
00003 
00004 #include "cryptlib.h"
00005 
00006 NAMESPACE_BEGIN(CryptoPP)
00007 
00008 //! ADLER-32 checksum calculations 
00009 class Adler32 : public HashTransformation
00010 {
00011 public:
00012         enum {DIGESTSIZE = 4};
00013         Adler32() {Reset();}
00014         void Update(const byte *input, unsigned int length);
00015         void TruncatedFinal(byte *hash, unsigned int size);
00016         unsigned int DigestSize() const {return DIGESTSIZE;}
00017 
00018 private:
00019         void Reset() {m_s1 = 1; m_s2 = 0;}
00020 
00021         word16 m_s1, m_s2;
00022 };
00023 
00024 NAMESPACE_END
00025 
00026 #endif

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