text: // Copyright (c) 2012-2017, The CryptoNote developers, The Marcoin developers
  //
  // This file is part of Marcoin.
  //
  // Bytecoin is free software: you can redistribute it and/or modify
  // it under the terms of the GNU Lesser General Public License as published by
  // the Free Software Foundation, either version 3 of the License, or
  // (at your option) any later version.
  //
  // Bytecoin is distributed in the hope that it will be useful,
  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  // GNU Lesser General Public License for more details.
  //
  // You should have received a copy of the GNU Lesser General Public License
  // along with Bytecoin.  If not, see <http://www.gnu.org/licenses/>.
  
  #include <stddef.h>
  #include <stdint.h>
  #include <string.h>
  
  #include "hash-ops.h"
  #include "keccak.h"
  
  void hash_permutation(union hash_state *state) {
    keccakf((uint64_t*)state, 24);
  }
  
  void hash_process(union hash_state *state, const uint8_t *buf, size_t count) {
    keccak1600(buf, (int)count, (uint8_t*)state);
  }
  
  void cn_fast_hash(const void *data, size_t length, char *hash) {
    union hash_state state;
    hash_process(&state, data, length);
    memcpy(hash, &state, HASH_SIZE);
  }
  