diff options
Diffstat (limited to 'security/nss/lib/ssl/sslbloom.h')
| -rw-r--r-- | security/nss/lib/ssl/sslbloom.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/security/nss/lib/ssl/sslbloom.h b/security/nss/lib/ssl/sslbloom.h new file mode 100644 index 0000000000..032c94b0f0 --- /dev/null +++ b/security/nss/lib/ssl/sslbloom.h @@ -0,0 +1,32 @@ +/* -*- 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_ */ |