public const String version = "1.4"; //$NON-NLS-1$
/**
* Generates a scanner for the specified input file.
*
* @param inputFile a file containing a lexical specification
* to generate a scanner for.
*/
public static void generate(File inputFile)
{
Out.resetCounters();
Timer totalTime = new Timer();
Timer time = new Timer();
LexScan scanner = null;
LexParse parser = null;
TextReader inputReader = null;
totalTime.start();
try {
Out.println(ErrorMessages.READING, inputFile.ToString());
inputReader = new StreamReader(inputFile);
scanner = new LexScan(inputReader);
scanner.setFile(inputFile);
parser = new LexParse(scanner);
}
catch (FileNotFoundException) {
Out.error(ErrorMessages.CANNOT_OPEN, inputFile.ToString());
throw new GeneratorException();
}
try {
NFA nfa = (NFA)parser.parse().value;
Out.checkErrors();
if (Options.dump)
{
Out.dump(ErrorMessages.get(ErrorMessages.NFA_IS) +
Out.NL + nfa + Out.NL);
}
if (Options.dot)
{
nfa.writeDot(Emitter.normalize("nfa.dot", null)); //$NON-NLS-1$
}
Out.println(ErrorMessages.NFA_STATES, nfa.numStates);
time.start();
DFA dfa = nfa.getDFA();
time.stop();
Out.time(ErrorMessages.DFA_TOOK, time);
dfa.checkActions(scanner, parser);
nfa = null;
if (Options.dump)
{
Out.dump(ErrorMessages.get(ErrorMessages.DFA_IS) +
Out.NL + dfa + Out.NL);
}
if (Options.dot)
{
dfa.writeDot(Emitter.normalize("dfa-big.dot", null)); //$NON-NLS-1$
}
time.start();
dfa.minimize();
time.stop();
Out.time(ErrorMessages.MIN_TOOK, time);
if (Options.dump)
{
Out.dump(ErrorMessages.get(ErrorMessages.MIN_DFA_IS) +
Out.NL + dfa);
}
if (Options.dot)
{
dfa.writeDot(Emitter.normalize("dfa-min.dot", null)); //$NON-NLS-1$
}
time.start();
Emitter e = new Emitter(inputFile, parser, dfa);
e.emit();
time.stop();
Out.time(ErrorMessages.WRITE_TOOK, time);
totalTime.stop();
Out.time(ErrorMessages.TOTAL_TIME, totalTime);
}
catch (ScannerException e) {
Out.error(e.file, e.message, e.line, e.column);
throw new GeneratorException();
}
catch (MacroException e) {
Out.error(e.Message);
throw new GeneratorException();
}
catch (IOException e) {
Out.error(ErrorMessages.IO_ERROR, e.ToString());
throw new GeneratorException();
}
catch (OutOfMemoryException) {
Out.error(ErrorMessages.OUT_OF_MEMORY);
throw new GeneratorException();
}
catch (GeneratorException) {
throw new GeneratorException();
}
catch (Exception e) {
Out.error(e.ToString());
throw new GeneratorException();
}
}