Class: XDR::VarOpaque

Inherits:
Object
  • Object
show all
Includes:
Concerns::ConvertsToXDR, Concerns::StringConverter
Defined in:
lib/xdr/var_opaque.rb

Instance Method Summary collapse

Methods included from Concerns::StringConverter

#valid?

Methods included from Concerns::ConvertsToXDR

#from_xdr, #to_xdr, #valid?

Constructor Details

#initialize(length = XDR::MAX_SIZE) ⇒ VarOpaque

Returns a new instance of VarOpaque.



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# File 'lib/xdr/var_opaque.rb', line 7

def initialize(length = XDR::MAX_SIZE)
  @length = length
end

Instance Method Details

#read(io) ⇒ Object 



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# File 'lib/xdr/var_opaque.rb', line 23

def read(io)
  length = XDR::Int.read(io)

  if length > @length
    raise XDR::ReadError, "VarOpaque length #{length}"
  end

  padding = padding_for length

  # read and return length bytes
  # throw away padding bytes
  read_bytes(io, length).tap { read_zeros(io, padding) }
end

#write(val, io) ⇒ Object 



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# File 'lib/xdr/var_opaque.rb', line 11

def write(val, io)
  length = val.bytesize

  if length > @length
    raise XDR::WriteError, "Value length #{length} exceeds max #{@length}"
  end

  XDR::Int.write(length, io)
  io.write val
  io.write "\x00" * padding_for(length)
end