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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* A bloom filter.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef __sslbloom_h_
#define __sslbloom_h_
#include "prtypes.h"
#include "seccomon.h"
typedef struct sslBloomFilterStr {
unsigned int k; /* The number of hashes. */
unsigned int bits; /* The number of bits in each hash: bits = log2(m) */
PRUint8 *filter; /* The filter itself. */
} sslBloomFilter;
SECStatus sslBloom_Init(sslBloomFilter *filter, unsigned int k, unsigned int bits);
void sslBloom_Zero(sslBloomFilter *filter);
void sslBloom_Fill(sslBloomFilter *filter);
/* Add the given hashes to the filter. It's the caller's responsibility to
* ensure that there is at least |ceil(k*bits/8)| bytes of data available in
* |hashes|. Returns PR_TRUE if the entry was already present or it was likely
* to be present. */
PRBool sslBloom_Add(sslBloomFilter *filter, const PRUint8 *hashes);
PRBool sslBloom_Check(sslBloomFilter *filter, const PRUint8 *hashes);
void sslBloom_Destroy(sslBloomFilter *filter);
#endif /* __sslbloom_h_ */