Class: GVariantOffsetType

Inherits:
GVariantBasicType show all
Defined in:
lib/gvariant.rb

Instance Attribute Summary

Attributes inherited from GVariantBasicType

#alignment, #default_value, #fixed_size, #id

Instance Method Summary collapse

Methods inherited from GVariantBasicType

#align, #pad, #read, #write

Constructor Details

#initialize(id, alignment, default_value) ⇒ GVariantOffsetType

Returns a new instance of GVariantOffsetType.



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# File 'lib/gvariant.rb', line 155

def initialize(id, alignment, default_value)
  @offset_size = nil
  super(id, nil, alignment, nil, default_value)
end

Instance Method Details

#read_offset(buf, n) ⇒ Object 



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# File 'lib/gvariant.rb', line 160

def read_offset(buf, n)
  l = buf.length
  determine_offset_type(l)
  buf.unpack("@#{l + @offset_size * n}#{@offset_pack_format}")[0]
end

#write_offsets(buf, offsets) ⇒ Object 



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# File 'lib/gvariant.rb', line 166

def write_offsets(buf, offsets)
  return buf if offsets.empty?
  offset_size_prev = nil
  packed_size = 0
  packed = ""

  loop do
    determine_offset_type(buf.length + packed_size, false)
    break if @offset_size == offset_size_prev
    offset_size_prev = @offset_size

    packed_size = offsets.count * @offset_size
    packed = offsets.pack("#{@offset_pack_format}*")
  end

  buf << packed
end