/* * gnu.classpath.tools.JavapMain Copyright (C) 2001 Free Software Foundation, * Inc. * * This file is part of GNU Classpath. * * GNU Classpath 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, or (at your option) any later version. * * GNU Classpath 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 * GNU Classpath; see the file COPYING. If not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ package gnu.classpath.tools.javap; public class JavapMain { public static void main(String argv[]) { Javap p = parseArguments(argv); System.exit(0); } /** * Parses the arguments to determine what this program should do. */ private static Javap parseArguments(String s[]) { Javap p = null; try { p = Javap.getInstance(); } catch (ClassNotFoundException e) { System.err.println(e.getMessage()); return null; } if (s.length == 0) usage(); boolean processArguments = true; int i = 0; while (processArguments) { if (s[i].equals("-c")) p.setDisassemble(true); else if (s[i].equals("-classpath")) p.setClasspath(s[++i]); else if (s[i].equals("-help")) usage(); else if (s[i].equals("-l")) { p.setPrintLineNumbers(true); p.setPrintLocalVariables(true); } else if (s[i].equals("-public")) p.setShowPublic(true); else if (s[i].equals("-protected")) p.setShowProtected(true); else if (s[i].equals("-private")) p.setShowPrivate(true); else if (s[i].equals("-s")) p.setPrintSignatures(true); else if (s[i].equals("-verbose")) { p.setPrintStackSize(true); p.setPrintNumberLocals(true); p.setPrintMethodArgs(true); } else if (s[i].startsWith("-")) { System.err.println("Invalid flag: " + s[i]); usage(); } else break; i++; } if (s.length - i == 0) usage(); for (int j = i; j < s.length; j++) p.printClassFile(s[j], System.out); return p; } /** * Prints generic usage message to System.out. */ private static void usage() { System.out.println("Usage: javap [OPTION]... [CLASS]..."); System.out.println("Provide information about the given classes."); System.out.println(""); System.out.println(" -c Disassemble the code"); System.out .println(" -classpath PATH Specify where to find user class files"); System.out.println(" -help Print this usage message"); System.out .println(" -l Print line number and local variable tables"); System.out .println(" -public Show only public classes and members"); System.out .println(" -protected Show public and protected classes and members"); System.out .println(" -private Show all classes and members"); System.out .println(" -s Print internal type signatures"); System.out .println(" -verbose Print stack size, number of locals and args for methods"); System.exit(0); } }