Module: PulsarSdk::Producer::Murmur3

Extended by:
Murmur3
Included in:
Murmur3
Defined in:
lib/pulsar_sdk/producer/router.rb

Overview

cpoy from github.com/funny-falcon/murmurhash3-ruby

Constant Summary collapse

MASK32 = 
0xffffffff

Instance Method Summary collapse

Instance Method Details

#hash(str, seed = 0) ⇒ Object 



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# File 'lib/pulsar_sdk/producer/router.rb', line 56

def hash(str, seed=0)
  h1 = seed
  numbers = str.unpack('V*C*')
  tailn = str.bytesize % 4
  tail = numbers.slice!(numbers.size - tailn, tailn)
  for k1 in numbers
    h1 ^= mmix(k1)
    h1 = rotl(h1, 13)
    h1 = (h1*5 + 0xe6546b64) & MASK32
  end

  unless tail.empty?
    k1 = 0
    tail.reverse_each do |c1|
      k1 = (k1 << 8) | c1
    end
    h1 ^= mmix(k1)
  end

  h1 ^= str.bytesize
  fmix(h1)
end

#int32_hash(i, seed = 0) ⇒ Object 



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# File 'lib/pulsar_sdk/producer/router.rb', line 52

def int32_hash(i, seed=0)
  hash([i].pack("V"), seed)
end