public static void main(String[] args) {
if (args.length == 0) System.err.println("No file arguments given");
else {
// parse each file argument given
for (int i = 0; i < args.length; i++) {
FileReader file;
// attempt to open file
try {
file = new FileReader("programs/" + args[i]);
} catch (FileNotFoundException e) {
System.err.println(args[i] + " was not found in MiniJava/programs");
continue; // try next file
}
// create lexer
Lexer lexer = new Lexer(file);
// start tokenizing file
System.out.println("Tokenizing " + args[i] + "...");
long startTime = System.currentTimeMillis();
int numTokens = 0;
Token token;
do {
token = lexer.getToken();
numTokens++;
// print token type and location
System.out.print(token.getType());
System.out.print(" (" + token.getLineNum() + "," + token.getColNum() + ")");
// print out semantic values for ID and INT_CONST tokens
if (token.getType() == TokenType.ID) System.out.println(": " + lexer.getIdVal());
else if (token.getType() == TokenType.INT_CONST)
System.out.println(": " + lexer.getIntVal());
else System.out.println();
} while (token.getType() != TokenType.EOF);
long endTime = System.currentTimeMillis();
// print out statistics
System.out.println("---");
System.out.println("Number of tokens: " + numTokens);
System.out.println("Execution time: " + (endTime - startTime) + "ms");
System.out.println();
}
}
}
