/**
* Parse command line options and arguments to set various user-option flags and variables.
*
* @param argv the command line arguments to be parsed.
*/
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("-input")) {
/* must have an arg */
if (++i >= len || argv[i].startsWith("-") || argv[i].endsWith(".cup"))
usage("-input must have a name argument");
/* record the name */
emit.input_file_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("-out")) {
/* must have an arg */
if (++i >= len || argv[i].startsWith("-")) usage("-out must have a path argument");
/* validate path */
if (argv[i].length() != 0) {
out_path = argv[i] + File.separator;
File f = new File(out_path);
if (!f.exists() || !f.isDirectory()) out_path = null;
}
if (out_path == null) usage("-out argument must be a valid existing path");
} 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;
else {
usage("Unrecognized option \"" + argv[i] + "\"");
}
}
}
