Detect fbx format (Binary one or ASCII one) with ruby

detect_fbx_format.rb

FILE_PATH = File.expand_path './file.fbx'
CORRECT = %w"K a y d a r a \  F B X \  B i n a r y \  \ "

def binary_fbx? file_path
  File.open( file_path, 'rb' ) do |file|
    CORRECT.each do |char|
      num = file.read( 1 )
      false if num != char
    end

    false if file.read( 1 ) != "\x00"
    false if file.read( 2 ) != "\x1A\x00" # Byte 21-22

    # version = file.read( 4 ) # Byte 23-26
    # int_version = version.unpack("L") # 32 bit integer

    true
  end
end