/*
 * $Id$
 *
 * Copyright (C) 2003-2015 JNode.org
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library 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 Lesser General Public 
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; If not, write to the Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
package org.jnode.build.x86;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * @author Ewout Prangsma (epr@users.sourceforge.net)
 */
public class Disasm {

    private static final String NDISASM = System.getProperty("os.name").toLowerCase().contains("win")
        ? "ndisasmw" : "ndisasm";

    private static final String UDIS86 = "udis86";

    public static void main(String[] args) throws IllegalArgumentException,
        SecurityException, IOException, InterruptedException {
        final File f = File.createTempFile("disasm", "jnode");
        int firstByteArg = 0;
        final String disasm;
        if ((args.length > 0) && (args[0].equals("x86_64"))) {
            firstByteArg++;
            disasm = UDIS86 + " --code64 --offset ";
        } else {
            disasm = NDISASM + " -u ";
        }
        FileOutputStream os = new FileOutputStream(f);
        try {
            for (int i = firstByteArg; i < args.length; i++) {
                os.write(Integer.parseInt(args[i], 16));
            }
        } finally {
            os.close();
        }

        final String cmdLine = disasm + f.getAbsolutePath();
        exec(cmdLine);

    }

    private static void exec(String cmdLine) throws IOException,
        InterruptedException {
        Process proc = Runtime.getRuntime().exec(cmdLine);
        CopyThread stderr = new CopyThread(proc.getErrorStream(), System.out);
        CopyThread stdout = new CopyThread(proc.getInputStream(), System.out);
        stderr.start();
        stdout.start();
        proc.waitFor();
    }

    static class CopyThread extends Thread {

        private final InputStream is;

        private final OutputStream out;

        public CopyThread(InputStream is, OutputStream out) {
            this.is = is;
            this.out = out;
        }

        public void run() {
            int ch;
            try {
                while ((ch = is.read()) >= 0) {
                    out.write(ch);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}