Class: CBOR::Ibox

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

Constant Summary collapse

INTEGER_EI = 
{
  "i" => [23, 0],
  "0" => [0xFF, 1],
  "1" => [0xFFFF, 2],
  "2" => [0xFFFFFFFF, 4],
  "3" => [0xFFFFFFFFFFFFFFFF, 8]
}

Instance Attribute Summary

Attributes inherited from Box

#options, #value

Instance Method Summary collapse

Methods inherited from Box

#cbor_diagnostic, from_number, #inspect, #to_s

Instance Method Details

#make_head(ib, plusbytes, d) ⇒ Object 



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# File 'lib/cbor-diag-support.rb', line 41

def make_head(ib, plusbytes, d)
  case plusbytes
  when 0
    [ib + d].pack("C")
  when 1
    [ib + 24, d].pack("CC")
  when 2
    [ib + 25, d].pack("Cn")
  when 4
    [ib + 26, d].pack("CN")
  when 8
    [ib + 27, d].pack("CQ>")
  else
    raise ArgumentError, "cbor-diagnostic: #{plusbytes} plusbytes when encoding head\n"
  end
end

#to_cbor ⇒ Object 



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# File 'lib/cbor-diag-support.rb', line 58

def to_cbor
  if ei = options[:ei]
    maxval, plusbytes = INTEGER_EI[ei]
    raise ArgumentError, "cbor-diagnostic: unknown encoding indicator _#{ei} for Integer\n" unless maxval
    d = value
    ib = if d < 0
           d = -1-d
           0x20
         else
           0x00
         end
    raise ArgumentError, "cbor-diagnostic: #{value} doesn't fit into encoding indicator _#{ei}':\n" unless d <= maxval

    make_head(ib, plusbytes, d)

    # s = bignum_to_bytes(d)
    # head(0xc0, TAG_BIGNUM_BASE + (ib >> 5))
    # head(0x40, s.bytesize)
  else
    CBOR.encode(value)
  end
end