text: #ifndef HASH_H
  #define    HASH_H
  
  typedef uint32_t (*hash_func)(const void *key, size_t length);
  hash_func hash;
  hash_func keysign;
  
  enum hashfunc_type {
      JENKINS_HASH=0, MURMUR3_HASH
  };
  
  int hash_init(enum hashfunc_type type);
  
  #endif    /* HASH_H */
  
  