Method: FileData::ExifStream#read_header

Defined in:
lib/file_data/formats/exif/exif_stream.rb

#read_header ⇒ Object 



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# File 'lib/file_data/formats/exif/exif_stream.rb', line 33

def read_header
  @is_little_endian =
    case @stream.each_byte.take(2)
    when INTEL_BYTES then true
    when MOTOROLLA_BYTES then false
    else raise 'the byte order bytes did not match any expected value'
    end

  raise 'the tiff constant 42 is missing' unless read_value(2) == 42
end