Module: BitsCount::File

Defined in:
lib/bits_count/file.rb

Class Method Summary collapse

Class Method Details

.bits_count(path) ⇒ Object 



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# File 'lib/bits_count/file.rb', line 21

def bits_count(path)
  f_size = ::File.size(path)
  bit1_count = population_count(path)
  {
    bit0_count: f_size*8 - bit1_count,
    bit1_count: bit1_count
  }
end

.population_count(path, alg = :str) ⇒ Object 



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# File 'lib/bits_count/file.rb', line 6

def population_count(path, alg = :str)
  ::File.open(path, "rb") do |f|
    case alg
    when :int32
      IO.population_count_int32(f) 
    when :str
      IO.population_count_str(f) 
    when :map
      IO.population_count_map(f) 
    else
      raise NotImplementedError, "#{alg} algorithm is not implemented"
    end
  end
end