Class: BinData::Pointer

Inherits:
BasePrimitive show all
Includes:
ClassParametersPlugin
Defined in:
lib/binproxy/bd_util.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from ClassParametersPlugin

included

Methods inherited from BasePrimitive

#annotated_snapshot

Instance Attribute Details

#ptr ⇒ Object (readonly)

Returns the value of attribute ptr.



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# File 'lib/binproxy/bd_util.rb', line 231

def ptr
  @ptr
end

#val ⇒ Object (readonly)

Returns the value of attribute val.



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# File 'lib/binproxy/bd_util.rb', line 231

def val
  @val
end

Instance Method Details

#read_and_return_value(io) ⇒ Object 



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# File 'lib/binproxy/bd_util.rb', line 233

def read_and_return_value(io)
  ptr_obj = get_parameter(:ptr_type).instantiate(nil,self)
  val_obj = get_parameter(:val_type).instantiate(nil,self)
  ptr = ptr_obj.read(io)

  rio = io.raw_io
  pos = rio.pos

  base = case get_parameter(:seek_from)
      when :raw_start  then 0
      when :start      then io.initial_pos
      when :current    then pos + ptr
      else raise "Invalid seek_from parameter"
      end

  rio.seek base + get_parameter(:seek_offset) + ptr
  val_obj.read(rio)
  rio.seek pos

  #{p: ptr_obj, v: val_obj}
  val_obj
end

#sensible_default ⇒ Object 



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# File 'lib/binproxy/bd_util.rb', line 262

def sensible_default
  #{p: 0, v: nil}
  get_parameter(:val_type).instantiate(nil,self)
end

#value_to_binary_string(v) ⇒ Object

XXX hacky below, handles reading only



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# File 'lib/binproxy/bd_util.rb', line 258

def value_to_binary_string(v)
  v.to_binary_s
end