adler32.h

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/*
* Adler32
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
 
#ifndef BOTAN_ADLER32_H__
#define BOTAN_ADLER32_H__
 
#include <botan/hash.h>
 
namespace Botan {
 
/**
* The Adler32 checksum, used in zlib
*/
class BOTAN_DLL Adler32 : public HashFunction
   {
   public:
      std::string name() const { return "Adler32"; }
      size_t output_length() const { return 4; }
      HashFunction* clone() const { return new Adler32; }
 
      void clear() { S1 = 1; S2 = 0; }
 
      Adler32() { clear(); }
      ~Adler32() { clear(); }
   private:
      void add_data(const byte[], size_t);
      void final_result(byte[]);
      u16bit S1, S2;
   };
 
}
 
#endif