bytevectorhash.h raw

   1  // Copyright (c) 2018-present The Bitcoin Core developers
   2  // Distributed under the MIT software license, see the accompanying
   3  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   4  
   5  #ifndef BITCOIN_UTIL_BYTEVECTORHASH_H
   6  #define BITCOIN_UTIL_BYTEVECTORHASH_H
   7  
   8  #include <cstdint>
   9  #include <cstddef>
  10  #include <vector>
  11  
  12  /**
  13   * Implementation of Hash named requirement for types that internally store a byte array. This may
  14   * be used as the hash function in std::unordered_set or std::unordered_map over such types.
  15   * Internally, this uses a random instance of SipHash-2-4.
  16   */
  17  class ByteVectorHash final
  18  {
  19  private:
  20      uint64_t m_k0, m_k1;
  21  
  22  public:
  23      ByteVectorHash();
  24      size_t operator()(const std::vector<unsigned char>& input) const;
  25  };
  26  
  27  #endif // BITCOIN_UTIL_BYTEVECTORHASH_H
  28