require 'bit_struct/field'

module BitStruct

  class TextField < Field

    def initialize( name, length, description = nil )
      raise "Length must be multiple of 8" unless ( length % 8 ) == 0
      super name, length, description
      @length_in_bytes = length / 8
    end

    def read( slicer )
      res = ''
      slicer.get_bytes.reverse.each { |b| res << b }
      res
    end

    def write( slicer, new_value )
      bytes = []
      new_value.each_byte { |b| bytes << b }
      slicer.set_bytes bytes.reverse
    end

  end

end