text: /*
   * util/storage/lookup3.h - header file for hashing functions.
   *
   * Copyright (c) 2007, NLnet Labs. All rights reserved.
   *
   * This software is open source.
   * 
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 
   * Redistributions of source code must retain the above copyright notice,
   * this list of conditions and the following disclaimer.
   * 
   * Redistributions in binary form must reproduce the above copyright notice,
   * this list of conditions and the following disclaimer in the documentation
   * and/or other materials provided with the distribution.
   * 
   * Neither the name of the NLNET LABS nor the names of its contributors may
   * be used to endorse or promote products derived from this software without
   * specific prior written permission.
   * 
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  /**
   * \file
   *
   * This file contains header definitions for the hash functions we use.
   * The hash functions are public domain (see lookup3.c).
   */
  
  #ifndef UTIL_STORAGE_LOOKUP3_H
  #define UTIL_STORAGE_LOOKUP3_H
  
  /**
   * Hash key made of 4byte chunks.
   * @param k: the key, an array of uint32_t values
   * @param length: the length of the key, in uint32_ts
   * @param initval: the previous hash, or an arbitrary value
   * @return: hash value.
   */
  uint32_t hashword(const uint32_t *k, size_t length, uint32_t initval);
  
  /**
   * Hash key data.
   * @param k: the key, array of uint8_t
   * @param length: the length of the key, in uint8_ts
   * @param initval: the previous hash, or an arbitrary value
   * @return: hash value.
   */
  uint32_t hashlittle(const void *k, size_t length, uint32_t initval);
  
  /**
   * Set the randomisation initial value, set this before threads start,
   * and before hashing stuff (because it changes subsequent results).
   * @param v: value
   */
  void hash_set_raninit(uint32_t v);
  
  #endif /* UTIL_STORAGE_LOOKUP3_H */
  