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/* HashKit
* Copyright (C) 2009 Brian Aker
* All rights reserved.
*
* Use and distribution licensed under the BSD license. See
* the COPYING file in the parent directory for full text.
*/
/*
This has is Jenkin's "One at A time Hash".
http://en.wikipedia.org/wiki/Jenkins_hash_function
*/
#include <libhashkit/common.h>
uint32_t hashkit_one_at_a_time(const char *key, size_t key_length, void *context)
{
const char *ptr= key;
uint32_t value= 0;
(void)context;
while (key_length--)
{
uint32_t val= (uint32_t) *ptr++;
value += val;
value += (value << 10);
value ^= (value >> 6);
}
value += (value << 3);
value ^= (value >> 11);
value += (value << 15);
return value;
}
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