require "formula"

class Nasm < Formula
  desc "Netwide Assembler (NASM) is an 80x86 assembler"
  homepage "http://www.nasm.us/"
  url "http://www.nasm.us/pub/nasm/releasebuilds/2.11.08/nasm-2.11.08.tar.xz"
  sha256 "c99467c7072211c550d147640d8a1a0aa4d636d4d8cf849f3bf4317d900a1f7f"

  bottle do
    cellar :any
    sha256 "4b7434920425f190c807863d79f653d1f3a8668916f5780a5f2c529056d714b9" => :yosemite
    sha256 "dbcbfe3dd3f67dce50f6baf2a0aea7021f4c893863b4ed552542685488519b38" => :mavericks
    sha256 "0191f8c219a08f1a3207d63e07b736b627f90d80373d400bded4cada29afc184" => :mountain_lion
  end

  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