Class: CBOR::Xbox

Inherits:
Box
  • Object
show all
Defined in:
lib/cbor-diag-support.rb

Constant Summary

Constants inherited from Box

Box::INTEGER_EI

Instance Attribute Summary

Attributes inherited from Box

#options, #value

Instance Method Summary collapse

Methods inherited from Box

#cbor_diagnostic, from_instance, #inspect, make_head, #to_s

Instance Method Details

#to_cbor ⇒ Object 



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# File 'lib/cbor-diag-support.rb', line 67

def to_cbor
  enc = CBOR.encode(value)
  if ei = options[:ei]
    maxval, plusbytes = INTEGER_EI[ei]
    if maxval
      ib = enc.getbyte(0) & 0xE0
      ai = enc.getbyte(0) & 0x1F
      d, replacement = case ai
                       when 0...24; [ai, 0]
                       when 24; [enc[1..1].ord, 1]
                       when 25; [enc[1..2].unpack1("n"), 2]
                       when 26; [enc[1..4].unpack1("N"), 4]
                       when 27; [enc[1..8].unpack1("Q>"), 8]
                       # when 31; XXX conflicting EI information
                       else raise "unknown additional information #{ai} in ib #{ib}"
                       end
      raise ArgumentError, "cbor-diagnostic: #{value} doesn't fit into encoding indicator _#{ei}':\n" unless d <= maxval
      ib = enc.getbyte(0) & 0xE0
      new_head = CBOR::Ibox.make_head(ib, plusbytes, d)
      enc[0..replacement] = new_head
    else
      if ei == "" && value == ""
        enc = CBOR.encode(value.cbor_stream!([]))
      else
        warn "*** cbor-diagnostic: ignoring unsupported encoding indicator _#{ei} for #{value.inspect}"
      end
    end
  end
  enc
end