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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
#pragma once
/***
This file is part of systemd.
Copyright 2013 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd 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 GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
/*
* Our default bloom filter has the following parameters:
*
* m=512 (bits in the filter)
* k=8 (hash functions)
*
* We use SipHash24 as hash function with a number of (originally
* randomized) but fixed hash keys.
*
*/
#define DEFAULT_BLOOM_SIZE (512/8) /* m: filter size */
#define DEFAULT_BLOOM_N_HASH 8 /* k: number of hash functions */
void bloom_add_pair(uint64_t filter[], size_t size, unsigned n_hash, const char *a, const char *b);
void bloom_add_prefixes(uint64_t filter[], size_t size, unsigned n_hash, const char *a, const char *b, char sep);
bool bloom_validate_parameters(size_t size, unsigned n_hash);
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