| /* -*- 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_ */ |