mirror of
https://github.com/monero-project/monero.git
synced 2024-12-27 05:59:28 +00:00
72 lines
2.6 KiB
C
72 lines
2.6 KiB
C
|
/*
|
||
|
|
* 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 COPYRIGHT
|
||
|
|
* HOLDER 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 */
|