Class: String

Inherits:
Object show all
Defined in:
lib/gems/memcache-client-1.5.0/lib/memcache.rb

Instance Method Summary collapse

Instance Method Details

#crc32_ITU_T ⇒ Object

Uses the ITU-T polynomial in the CRC32 algorithm.



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# File 'lib/gems/memcache-client-1.5.0/lib/memcache.rb', line 13

def crc32_ITU_T
  n = length
  r = 0xFFFFFFFF

  n.times do |i|
    r ^= self[i]
    8.times do
      if (r & 1) != 0 then
        r = (r>>1) ^ 0xEDB88320
      else
        r >>= 1
      end
    end
  end

  r ^ 0xFFFFFFFF
end