# File lib/thinking_sphinx/search.rb, line 72
    def self.matching_fields(fields, bitmask)
      matches   = []
      bitstring = bitmask.to_s(2).rjust(32, '0').reverse
      
      fields.each_with_index do |field, index|
        matches << field if bitstring[index, 1] == '1'
      end
      matches
    end