require 'formula'

class Nasm < Formula
  homepage 'http://www.nasm.us/'
  url 'http://www.nasm.us/pub/nasm/releasebuilds/2.11.04/nasm-2.11.04.tar.xz'
  sha256 '4f07059a080883cd99f58da837a6504f1e0aa2757cbb0bb3064aca24a58da0f7'

  option :universal

  def install
    ENV.universal_binary if build.universal?
    system "./configure", "--prefix=#{prefix}"
    system "make install install_rdf"
  end

  test do
    (testpath/"foo.s").write <<-EOS
      mov eax, 0
      mov ebx, 0
      int 0x80
    EOS

    system "#{bin}/nasm", "foo.s"
    code = File.open("foo", "rb") { |f| f.read.unpack("C*") }
    expected = [0x66, 0xb8, 0x00, 0x00, 0x00, 0x00, 0x66, 0xbb,
                0x00, 0x00, 0x00, 0x00, 0xcd, 0x80]
    assert_equal expected, code
  end
end