jtulach@144: /*
jtulach@144:  * Copyright (c) 2002, 2003, Oracle and/or its affiliates. All rights reserved.
jtulach@144:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jtulach@144:  *
jtulach@144:  * This code is free software; you can redistribute it and/or modify it
jtulach@144:  * under the terms of the GNU General Public License version 2 only, as
jtulach@144:  * published by the Free Software Foundation.  Oracle designates this
jtulach@144:  * particular file as subject to the "Classpath" exception as provided
jtulach@144:  * by Oracle in the LICENSE file that accompanied this code.
jtulach@144:  *
jtulach@144:  * This code is distributed in the hope that it will be useful, but WITHOUT
jtulach@144:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jtulach@144:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
jtulach@144:  * version 2 for more details (a copy is included in the LICENSE file that
jtulach@144:  * accompanied this code).
jtulach@144:  *
jtulach@144:  * You should have received a copy of the GNU General Public License version
jtulach@144:  * 2 along with this work; if not, write to the Free Software Foundation,
jtulach@144:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jtulach@144:  *
jtulach@144:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
jtulach@144:  * or visit www.oracle.com if you need additional information or have any
jtulach@144:  * questions.
jtulach@144:  */
jtulach@144: 
jtulach@144: 
jtulach@144: 
jtulach@144: package sun.tools.javap;
jtulach@144: 
jtulach@144: import java.util.*;
jtulach@144: import java.io.*;
jtulach@144: 
jtulach@144: /**
jtulach@144:  * Entry point for javap, class file disassembler.
jtulach@144:  *
jtulach@144:  * @author  Sucheta Dambalkar (Adopted code from old javap)
jtulach@144:  */
jtulach@144: public class Main{
jtulach@144: 
jtulach@144:     private Vector classList = new Vector();
jtulach@144:     private PrintWriter out;
jtulach@144:     JavapEnvironment env = new JavapEnvironment();
jtulach@144:     private static boolean errorOccurred = false;
jtulach@144:     private static final String progname = "javap";
jtulach@144: 
jtulach@144: 
jtulach@144:     public Main(PrintWriter out){
jtulach@144:         this.out = out;
jtulach@144:     }
jtulach@144: 
jtulach@144:     public static void main(String argv[]) {
jtulach@144:         entry(argv);
jtulach@144:         if (errorOccurred) {
jtulach@144:             System.exit(1);
jtulach@144:         }
jtulach@144:     }
jtulach@144: 
jtulach@144: 
jtulach@144:     /**
jtulach@144:      * Entry point for tool if you don't want System.exit() called.
jtulach@144:      */
jtulach@144:     public static void entry(String argv[]) {
jtulach@144:         PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
jtulach@144:         try {
jtulach@144: 
jtulach@144:             Main jpmain = new Main(out);
jtulach@144:             jpmain.perform(argv);
jtulach@144: 
jtulach@144:         } finally {
jtulach@144:             out.close();
jtulach@144:         }
jtulach@144:     }
jtulach@144: 
jtulach@144:     /**
jtulach@144:      * Process the arguments and perform the desired action
jtulach@144:      */
jtulach@144:     private void perform(String argv[]) {
jtulach@144:         if (parseArguments(argv)) {
jtulach@144:             displayResults();
jtulach@144: 
jtulach@144:         }
jtulach@144:     }
jtulach@144: 
jtulach@144:     private void error(String msg) {
jtulach@144:         errorOccurred = true;
jtulach@144:         System.err.println(msg);
jtulach@144:         System.err.flush();
jtulach@144:     }
jtulach@144: 
jtulach@144:     /**
jtulach@144:      * Print usage information
jtulach@144:      */
jtulach@144:     private void usage() {
jtulach@144:         java.io.PrintStream out = System.out;
jtulach@144:         out.println("Usage: " + progname + " <options> <classes>...");
jtulach@144:         out.println();
jtulach@144:         out.println("where options include:");
jtulach@144:         out.println("   -c                        Disassemble the code");
jtulach@144:         out.println("   -classpath <pathlist>     Specify where to find user class files");
jtulach@144:         out.println("   -extdirs <dirs>           Override location of installed extensions");
jtulach@144:         out.println("   -help                     Print this usage message");
jtulach@144:         out.println("   -J<flag>                  Pass <flag> directly to the runtime system");
jtulach@144:         out.println("   -l                        Print line number and local variable tables");
jtulach@144:         out.println("   -public                   Show only public classes and members");
jtulach@144:         out.println("   -protected                Show protected/public classes and members");
jtulach@144:         out.println("   -package                  Show package/protected/public classes");
jtulach@144:         out.println("                             and members (default)");
jtulach@144:         out.println("   -private                  Show all classes and members");
jtulach@144:         out.println("   -s                        Print internal type signatures");
jtulach@144:         out.println("   -bootclasspath <pathlist> Override location of class files loaded");
jtulach@144:         out.println("                             by the bootstrap class loader");
jtulach@144:         out.println("   -verbose                  Print stack size, number of locals and args for methods");
jtulach@144:         out.println("                             If verifying, print reasons for failure");
jtulach@144:         out.println();
jtulach@144:     }
jtulach@144: 
jtulach@144:     /**
jtulach@144:      * Parse the command line arguments.
jtulach@144:      * Set flags, construct the class list and create environment.
jtulach@144:      */
jtulach@144:     private boolean parseArguments(String argv[]) {
jtulach@144:         for (int i = 0 ; i < argv.length ; i++) {
jtulach@144:             String arg = argv[i];
jtulach@144:             if (arg.startsWith("-")) {
jtulach@144:                 if (arg.equals("-l")) {
jtulach@144:                     env.showLineAndLocal = true;
jtulach@144:                 } else if (arg.equals("-private") || arg.equals("-p")) {
jtulach@144:                     env.showAccess = env.PRIVATE;
jtulach@144:                 } else if (arg.equals("-package")) {
jtulach@144:                     env.showAccess = env.PACKAGE;
jtulach@144:                 } else if (arg.equals("-protected")) {
jtulach@144:                     env.showAccess = env.PROTECTED;
jtulach@144:                 } else if (arg.equals("-public")) {
jtulach@144:                     env.showAccess = env.PUBLIC;
jtulach@144:                 } else if (arg.equals("-c")) {
jtulach@144:                     env.showDisassembled = true;
jtulach@144:                 } else if (arg.equals("-s")) {
jtulach@144:                     env.showInternalSigs = true;
jtulach@144:                 } else if (arg.equals("-verbose"))  {
jtulach@144:                     env.showVerbose = true;
jtulach@144:                 } else if (arg.equals("-v")) {
jtulach@144:                     env.showVerbose = true;
jtulach@144:                 } else if (arg.equals("-h")) {
jtulach@144:                     error("-h is no longer available - use the 'javah' program");
jtulach@144:                     return false;
jtulach@144:                 } else if (arg.equals("-verify")) {
jtulach@144:                     error("-verify is no longer available - use 'java -verify'");
jtulach@144:                     return false;
jtulach@144:                 } else if (arg.equals("-verify-verbose")) {
jtulach@144:                     error("-verify is no longer available - use 'java -verify'");
jtulach@144:                     return false;
jtulach@144:                 } else if (arg.equals("-help")) {
jtulach@144:                     usage();
jtulach@144:                     return false;
jtulach@144:                 } else if (arg.equals("-classpath")) {
jtulach@144:                     if ((i + 1) < argv.length) {
jtulach@144:                         env.classPathString = argv[++i];
jtulach@144:                     } else {
jtulach@144:                         error("-classpath requires argument");
jtulach@144:                         usage();
jtulach@144:                         return false;
jtulach@144:                     }
jtulach@144:                 } else if (arg.equals("-bootclasspath")) {
jtulach@144:                     if ((i + 1) < argv.length) {
jtulach@144:                         env.bootClassPathString = argv[++i];
jtulach@144:                     } else {
jtulach@144:                         error("-bootclasspath requires argument");
jtulach@144:                         usage();
jtulach@144:                         return false;
jtulach@144:                     }
jtulach@144:                 } else if (arg.equals("-extdirs")) {
jtulach@144:                     if ((i + 1) < argv.length) {
jtulach@144:                         env.extDirsString = argv[++i];
jtulach@144:                     } else {
jtulach@144:                         error("-extdirs requires argument");
jtulach@144:                         usage();
jtulach@144:                         return false;
jtulach@144:                     }
jtulach@144:                 } else if (arg.equals("-all")) {
jtulach@144:                     env.showallAttr = true;
jtulach@144:                 } else {
jtulach@144:                     error("invalid flag: " + arg);
jtulach@144:                     usage();
jtulach@144:                     return false;
jtulach@144:                 }
jtulach@144:             } else {
jtulach@144:                 classList.addElement(arg);
jtulach@144:                 env.nothingToDo = false;
jtulach@144:             }
jtulach@144:         }
jtulach@144:         if (env.nothingToDo) {
jtulach@144:             System.out.println("No classes were specified on the command line.  Try -help.");
jtulach@144:             errorOccurred = true;
jtulach@144:             return false;
jtulach@144:         }
jtulach@144:         return true;
jtulach@144:     }
jtulach@144: 
jtulach@144:     /**
jtulach@144:      * Display results
jtulach@144:      */
jtulach@144:     private void displayResults() {
jtulach@144:         for (int i = 0; i < classList.size() ; i++ ) {
jtulach@144:             String Name = (String)classList.elementAt(i);
jtulach@144:             InputStream classin = env.getFileInputStream(Name);
jtulach@144: 
jtulach@144:             try {
jtulach@144:                 JavapPrinter printer = new JavapPrinter(classin, out, env);
jtulach@144:                 printer.print();                // actual do display
jtulach@144: 
jtulach@144:             } catch (IllegalArgumentException exc) {
jtulach@144:                 error(exc.getMessage());
jtulach@144:             }
jtulach@144:         }
jtulach@144:     }
jtulach@144: }