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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2009 by Andrew Mahone
*
* jhash.c headers
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef _LIB_JHASH_H_
#define _LIB_JHASH_H_
#include <inttypes.h> /* defines uint32_t etc */
#include <string.h> /* size_t */
#include "plugin.h"
/*
hashw() -- hash an array of uint32_t into a 32-bit value
k: pointer to the key, an array of uint32_t
length: number of elements in the key
initval: an initialization value
returns the 32-bit hash
*/
uint32_t hashw(const uint32_t *k, size_t length, uint32_t initval);
/*
hashw() -- hash an array of uint32_t into two 32-bit values
(*pc) will be the same as the return value from hashword().
k: pointer to the key, an array of uint32_t
length: number of elements in the key
pc, pb: pointers to primary and secondary initial values, also used to store
the hash results.
*/
void hashw2 (const uint32_t *k, size_t length, uint32_t *pc, uint32_t *pb);
/*
hashs() -- hash an array of bytes into a 32-bit value
k: pointer to the key, an array of bytes
length: number of elements in the key
initval: an initialization value
returns the 32-bit hash
*/
uint32_t hashs( const void *key, size_t length, uint32_t initval);
/*
hashs2() -- hash an array of bytes into two 32-bit values
k: pointer to the key, an array of bytes
length: number of elements in the key
pc, pb: pointers to primary and secondary initial values, also used to store
the hash results.
*/
void hashs2(const void *key, size_t length, uint32_t *pc, uint32_t *pb);
#endif
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