br.edu.ifrn.potigol.Principal.java Source code

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Here is the source code for br.edu.ifrn.potigol.Principal.java

Source

/*
 *  Copyright (C) 2015  Leonardo Lucena
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

/**
 *   _____      _   _             _
 *  |  __ \    | | (_)           | |
 *  | |__) |__ | |_ _  __ _  ___ | |
 *  |  ___/ _ \| __| |/ _` |/ _ \| |
 *  | |  | (_) | |_| | (_| | (_) | |
 *  |_|   \___/ \__|_|\__, |\___/|_|
 *                     __/ |
 *                    |___/
 *
 * @author Leonardo Lucena (leonardo.lucena@escolar.ifrn.edu.br)
 */

package br.edu.ifrn.potigol;

import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

import org.antlr.v4.runtime.ANTLRInputStream;
import org.antlr.v4.runtime.CommonTokenStream;
import org.antlr.v4.runtime.tree.ParseTree;
import org.antlr.v4.runtime.tree.ParseTreeWalker;

import br.edu.ifrn.potigol.parser.potigolLexer;
import br.edu.ifrn.potigol.parser.potigolParser;

public class Principal {

    public static void main(String[] args) {
        if (args.length == 0) {
            System.out.println(
                    "Potigol verso 0.9.5 Copyright (C) 2015 Leonardo Lucena\n\nUso: potigol [arquivo.poti]\n");
            return;
        }
        System.out.print("Aguarde...");
        try {
            String arq = args[0];
            boolean debug = false;
            if (arq.equals("-d")) {
                arq = args[1];
                debug = true;
            }
            final Listener listener = getListner(arq);
            final String saida = listener.getSaida();
            if (saida.trim().length() > 40) {
                Compilador c = new Compilador(debug);
                c.executar(saida, lerArquivo(arq));
            }
        } catch (IOException e) {
            System.out.println("Erro: Arquivo " + args[0] + " no encontrado.");
        }
    }

    private static Listener getListner(final String arq) throws IOException {
        String r = lerArquivo(arq);
        final ANTLRInputStream input = new ANTLRInputStream(r);
        final potigolLexer lexer = new potigolLexer(input);
        final CommonTokenStream tokens = new CommonTokenStream(lexer);
        final potigolParser parser = new potigolParser(tokens);
        final ParseTree tree = parser.prog();
        final ParseTreeWalker walker = new ParseTreeWalker();
        final Listener listener = new Listener();

        try {
            // if (tree.toString() != "[]")
            walker.walk(listener, tree);
        } catch (Exception e) {
        }
        return listener;
    }

    private static String lerArquivo(String arq) throws IOException {
        Path path = Paths.get(arq);
        java.util.List<String> linhas = Files.readAllLines(path, StandardCharsets.UTF_8);
        StringBuffer s = new StringBuffer();
        for (String linha : linhas) {
            s.append(linha + "\n");
        }
        return s.toString();
    }

}