class Fiddle::StructArray

Wrapper for arrays within a struct

Public Class Methods

new(ptr, type, initial_values) click to toggle source

Calls superclass method Array::new

# File ext/fiddle/lib/fiddle/struct.rb, line 140
def initialize(ptr, type, initial_values)
  @ptr = ptr
  @type = type
  @is_struct = @type.respond_to?(:entity_class)
  if @is_struct
    super(initial_values)
  else
    @size = Fiddle::PackInfo::SIZE_MAP[type]
    @pack_format = Fiddle::PackInfo::PACK_MAP[type]
    super(initial_values.collect { |v| unsigned_value(v, type) })
  end
end

Public Instance Methods

[]=(index, value) click to toggle source

Calls superclass method Array#[]=

# File ext/fiddle/lib/fiddle/struct.rb, line 157
def []=(index, value)
  if index < 0 || index >= size
    raise IndexError, 'index %d outside of array bounds 0...%d' % [index, size]
  end

  if @is_struct
    self[index].replace(value)
  else
    to_ptr[index * @size, @size] = [value].pack(@pack_format)
    super(index, value)
  end
end

to_ptr() click to toggle source

# File ext/fiddle/lib/fiddle/struct.rb, line 153
def to_ptr
  @ptr
end