Class: RbSDL2::RWOperator::WriteCallback

Inherits:
FFI::Function
  • Object
show all
Defined in:
lib/rb_sdl2/rw_ops/rw_operator.rb

Instance Method Summary collapse

Constructor Details

#initialize(obj) ⇒ WriteCallback

Returns a new instance of WriteCallback.



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# File 'lib/rb_sdl2/rw_ops/rw_operator.rb', line 57

def initialize(obj)
  # size_t (* write) (struct SDL_RWops * context, const void *ptr, size_t size, size_t num);
  super(:size_t, [:pointer, :pointer, :size_t, :size_t]) do |_context, ptr, size, max_num|
    return 0 if ptr.null?
    obj.write(ptr.read_bytes(size * max_num)) / size rescue 0
  end
end