public void Load(string filename)
{
if (!File.Exists(filename))
{
throw new FileNotFoundException();
}
using (Stream stream = new FileStream(filename, FileMode.Open))
using (BinaryReader br = new BinaryReader(stream))
{
Capacity = br.ReadInt64();
ErrorRate = br.ReadSingle();
BitCount = (ulong)br.ReadInt64();
NumHashFuncs = (uint)br.ReadInt32();
Algorithm = br.ReadInt32();
hashBits = new BitStorage(BitCount, false);
hashBits.Load(br);
}
}
public BloomFilter(long capacity, float errorRate, ulong bitCount, uint numHashFuncs)
{
if (capacity <= 0)
{
throw new ArgumentOutOfRangeException("capacity", capacity, "capacity must be positive");
}
if (errorRate >= 1 || errorRate <= 0)
{
throw new ArgumentOutOfRangeException("errorRate", errorRate, "errorRate must be between 0 and 1");
}
Capacity = capacity;
ErrorRate = errorRate;
BitCount = bitCount;
NumHashFuncs = numHashFuncs;
// different algorithms could be added in the future
Algorithm = 0;
hashBits = new BitStorage(bitCount);
}