crc32.h

// //////////////////////////////////////////////////////////
// crc32.h
// Copyright (c) 2014,2015 Stephan Brumme. All rights reserved.
// see http://create.stephan-brumme.com/disclaimer.html
//

#pragma once

//#include "hash.h"
#include <string>

// define fixed size integer types
#ifdef _MSC_VER
// Windows
typedef unsigned __int8  uint8_t;
typedef unsigned __int32 uint32_t;
#else
// GCC
#include <stdint.h>
#endif

namespace hash_lib
{


class CRC32 //: public Hash
{
public:
  enum { HashBytes = 4 };

  CRC32();

  std::string operator()(const void* data, size_t numBytes);
  std::string operator()(const std::string& text);

  void add(const void* data, size_t numBytes);

  std::string getHash();
  void        getHash(unsigned char buffer[CRC32::HashBytes]);

  void reset();

private:
  uint32_t m_hash;
};

}