Class: CheapByteCount

Inherits:
Object
  • Object
show all
Defined in:
lib/cheap_byte_count.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(fd_in) ⇒ CheapByteCount

Returns a new instance of CheapByteCount.



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# File 'lib/cheap_byte_count.rb', line 19

def initialize(fd_in)
  @byte_count_array = []
  256.times {@byte_count_array << 0}
  while s = self.class.readblock(fd_in) do
    s.each_byte do |b|
      @byte_count_array[b] += 1
    end
  end
end

Instance Attribute Details

#byte_count_array ⇒ Object (readonly)

Returns the value of attribute byte_count_array.



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# File 'lib/cheap_byte_count.rb', line 17

def byte_count_array
  @byte_count_array
end

Class Method Details

.byte_count_array_from_file(file_name) ⇒ Object 



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# File 'lib/cheap_byte_count.rb', line 9

def self.byte_count_array_from_file(file_name)
  bca = nil
  File.open(file_name, 'rb') do |fd_in|
    bca = new(fd_in).byte_count_array
  end
  bca
end

.readblock(fd_in) ⇒ Object 



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# File 'lib/cheap_byte_count.rb', line 3

def self.readblock(fd_in)
  fd_in.readpartial 4096
rescue EOFError
  nil
end