hashes.hpp

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#ifndef __BOXES_HASHES_HPP__
#define __BOXES_HASHES_HPP__
 
#include <xxhash.h>
 
#include <memory>
 
namespace boxes::hash {
 
class XXHash64 {
public:
  explicit XXHash64(uint64_t seed = 0);
 
  void reset();
 
  void operator()(const uint8_t *key, std::size_t len);
 
  uint64_t final() const;
 
protected:
  uint64_t seed;
  std::unique_ptr<XXH64_state_t, decltype(&XXH64_freeState)> state;
};
 
class Murmur2A_X64_64 {
public:
  explicit Murmur2A_X64_64(uint64_t seed);
 
  void reset();
 
  void operator()(const uint8_t *key, std::size_t len);
 
  uint64_t final() const;
 
protected:
  uint64_t seed;
  uint64_t h;
};
 
class BJOneAtATime {
public:
  explicit BJOneAtATime(uint64_t seed);
 
  void reset();
 
  void operator()(const uint8_t *key, std::size_t length);
 
  uint64_t final() const;
 
protected:
  uint32_t hash;
  uint32_t seed;
};
 
} // namespace boxes::hash
 
#endif // __BOXES_HASHES_HPP__