protected static void parse_args()

in util/src/main/java/java_cup/Main.java [286:379]

• 73 lines of code
• 37 McCabe index (conditional complexity)

  protected static void parse_args(String argv[])
    {
      int len = argv.length;
      int i;

      /* parse the options */
      for (i=0; i<len; i++)
	{
	  /* try to get the various options */
	  if (argv[i].equals("-package"))
	    {
	      /* must have an arg */
	      if (++i >= len || argv[i].startsWith("-") || 
				argv[i].endsWith(".cup")) 
		usage("-package must have a name argument");

	      /* record the name */
	      emit.package_name = argv[i];
	    }
	  else if (argv[i].equals("-parser"))
	    {
	      /* must have an arg */
	      if (++i >= len || argv[i].startsWith("-") || 
				argv[i].endsWith(".cup")) 
		usage("-parser must have a name argument");

	      /* record the name */
	      emit.parser_class_name = argv[i];
	    }
	  else if (argv[i].equals("-symbols"))
	    {
	      /* must have an arg */
	      if (++i >= len || argv[i].startsWith("-") || 
				argv[i].endsWith(".cup")) 
		usage("-symbols must have a name argument");

	      /* record the name */
	      emit.symbol_const_class_name = argv[i];
	    }
	  else if (argv[i].equals("-nonterms"))
	    {
	      include_non_terms = true;
	    }
	  else if (argv[i].equals("-expect"))
	    {
	      /* must have an arg */
	      if (++i >= len || argv[i].startsWith("-") || 
				argv[i].endsWith(".cup")) 
		usage("-expect must have a name argument");

	      /* record the number */
	      try {
	        expect_conflicts = Integer.parseInt(argv[i]);
	      } catch (NumberFormatException e) {
		usage("-expect must be followed by a decimal integer");
	      }
	    }
	  else if (argv[i].equals("-compact_red"))  opt_compact_red = true;
	  else if (argv[i].equals("-nosummary"))    no_summary = true;
	  else if (argv[i].equals("-nowarn"))       emit.nowarn = true;
	  else if (argv[i].equals("-dump_states"))  opt_dump_states = true;
	  else if (argv[i].equals("-dump_tables"))  opt_dump_tables = true; 
	  else if (argv[i].equals("-progress"))     print_progress = true;
	  else if (argv[i].equals("-dump_grammar")) opt_dump_grammar = true;
	  else if (argv[i].equals("-dump")) 
	        opt_dump_states = opt_dump_tables = opt_dump_grammar = true; 
	  else if (argv[i].equals("-time"))         opt_show_timing = true; 
	  else if (argv[i].equals("-debug"))        opt_do_debug = true;
	  /* frankf 6/18/96 */
	  else if (argv[i].equals("-nopositions"))  lr_values = false;
	  /* CSA 12/21/97 */
	  else if (argv[i].equals("-interface"))    sym_interface = true;
	  /* CSA 23-Jul-1999 */
	  else if (argv[i].equals("-noscanner"))    suppress_scanner = true;
	  /* CSA 23-Jul-1999 */
	  else if (argv[i].equals("-version")) {
	      System.out.println(version.title_str);
	      System.exit(1);
	  }
	  /* CSA 24-Jul-1999; suggestion by Jean Vaucher */
	  else if (!argv[i].startsWith("-") && i==len-1) {
	      /* use input from file. */
	      try {
		  System.setIn(new FileInputStream(argv[i]));
	      } catch (java.io.FileNotFoundException e) {
		  usage("Unable to open \"" + argv[i] +"\" for input");
	      }
	  }
	  else
	    {
	      usage("Unrecognized option \"" + argv[i] + "\"");
	    }
	}
    }