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/*
* Copyright (c) 2018-2019 Hanspeter Portner (dev@open-music-kontrollers.ch)
*
* This is free software: you can redistribute it and/or modify
* it under the terms of the Artistic License 2.0 as published by
* The Perl Foundation.
*
* This source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Artistic License 2.0 for more details.
*
* You should have received a copy of the Artistic License 2.0
* along the source as a COPYING file. If not, obtain it from
* http://www.perlfoundation.org/artistic_license_2_0.
*/
#include <stdarg.h>
#include <stdio.h>
#include <d2tk/hash.h>
#include "mum.h"
#define SEED 12345
__attribute__((always_inline))
static inline uint64_t
_d2tk_hash(uint64_t hash, const void *key, size_t len)
{
return _mum_hash_aligned(hash + len, key, len);
}
D2TK_API uint64_t
d2tk_hash(const void *key, ssize_t len)
{
return mum_hash(key, len, SEED);
}
D2TK_API uint64_t
d2tk_hash_foreach(const void *key, ssize_t len, ...)
{
va_list args;
uint64_t hash = mum_hash_init(SEED);
hash = _d2tk_hash(hash, key, len);
va_start(args, len);
while( (key = va_arg(args, const void *)) )
{
hash = _d2tk_hash(hash, key, va_arg(args, size_t));
}
va_end(args);
return mum_hash_finish(hash);
}
D2TK_API uint64_t
d2tk_hash_dict(const d2tk_hash_dict_t *dict)
{
uint64_t hash = mum_hash_init(SEED);
for( ; dict->key; dict++)
{
hash = _d2tk_hash(hash, dict->key, dict->len);
}
return mum_hash_finish(hash);
}
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