Class: NiceFFI::Struct

Inherits:
FFI::Struct
  • Object
show all
Defined in:
lib/net-snmp2.rb

Overview

XXX

I just monkeypatched this to take a nil first argument.  Seems to work
Should probably submit this as a patch

Instance Method Summary collapse

Constructor Details

#initialize(val = nil, options = {}) ⇒ Struct

Returns a new instance of Struct.



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# File 'lib/net-snmp2.rb', line 47

def initialize( val = nil, options={} )
  # Stores certain kinds of member values so that we don't need
  # to create a new object every time they are read.
  @member_cache = {}

  options = {:autorelease => true}.merge!( options )

  case val

  when Hash
    super(FFI::Buffer.new(size))
    init_from_hash( val )         # Read the values from a Hash.

  # Note: plain "Array" would mean FFI::Struct::Array in this scope.
  when ::Array
    super(FFI::Buffer.new(size))
    init_from_array( val )        # Read the values from an Array.

  when String
    super(FFI::Buffer.new(size))
    init_from_bytes( val )        # Read the values from a bytestring.

  when self.class
    super(FFI::Buffer.new(size))
    init_from_bytes( val.to_bytes ) # Read the values from another instance.

  when FFI::Pointer, FFI::Buffer
    val = _make_autopointer( val, options[:autorelease] )

    # Normal FFI::Struct behavior to wrap the pointer.
    super( val )

  when nil
    super(val)
  else
    raise TypeError, "cannot create new #{self.class} from #{val.inspect}"
  end
end