Method: PureCDB::Reader#values

Defined in:
lib/purecdb/reader.rb

#values(key) ⇒ Object

Returns all values for key in an array



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# File 'lib/purecdb/reader.rb', line 107

def values(key)
  h = hash(key)

  hoff = @hashes[(h % 256)*2]
  hlen = @hashes[(h % 256)*2 + 1]

  return [] if hlen == 0
  off = (h / 256) % hlen

  vals = []

  # FIXME: Is this potentially an infinite loop (if full)?
  # Easy to avoid by exiting if off reaches the same value twice.

  while
      (slot = read(hoff + off * hashref_size .. hoff + off * hashref_size + hashref_size - 1)) &&
      (dslot = ary_unpack(slot,2)) && dslot[1] != 0

    if dslot[0] == h
      pos = dslot[1]

      rkey, value = read_entry(pos)
      if rkey == key
        vals << value
      end
    end
    off = (off + 1) % hlen
  end
  return vals
end