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Add bloom filter as separate code, work in progress factoring out multicast algorithm from the bloated Switch class.

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This commit is contained in:
Adam Ierymenko
2013-07-09 22:24:50 -04:00
parent b14856da50
commit 47f611e7b8
2 changed files with 123 additions and 32 deletions
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32
node/Utils.hpp
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@@ -460,38 +460,6 @@ public:
return ((*aptr & mask) == (*aptr & mask));
}
/**
* Add a value to a bloom filter
*
* Note that bloom filter methods depend on n being evenly distributed, so
* it's the job of the caller to implement any hashing.
*
* @param bits Bloom filter data (must be filterSize / 8 bytes in length)
* @param filterSize Size of bloom filter in BITS
* @param n Number to add
*/
static inline void bloomAdd(void *bits,unsigned int filterSize,unsigned int n)
throw()
{
n %= filterSize;
((unsigned char *)bits)[n / 8] |= (0x80 >> (n % 8));
}
/**
* Test for a value in a bloom filter
*
* @param bits Bloom filter data (must be filterSize / 8 bytes in length)
* @param filterSize Size of bloom filter in BITS
* @param n Number to test
* @return True if number might be in filter
*/
static inline bool bloomContains(const void *bits,unsigned int filterSize,unsigned int n)
throw()
{
n %= filterSize;
return ((((const unsigned char *)bits)[n / 8] & (0x80 >> (n % 8))));
}
/**
* Compute CRC64
*