/*

 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * A collection of useful global utilities commonly used.

 */

package sun.tools.pack.verify;

import java.io.*;

import java.util.*;

/*

 * @author ksrini

 */

class Globals {

    private static int errors = 0;

    private static PrintWriter _pw = null;

    private static String _logFileName = null;

    private static final String DEFAULT_LOG_FILE = "verifier.log";

    private static boolean _verbose = true;

    private static boolean _ignoreJarDirectories = false;

    private static boolean _checkJarClassOrdering = true;

    private static boolean _bitWiseClassCompare = false;

    // Ignore Deprecated, SourceFile and Synthetic

    private static boolean _ignoreCompileAttributes = false;

    // Ignore Debug Attributes LocalVariableTable, LocalVariableType,LineNumberTable

    private static boolean _ignoreDebugAttributes = false;

    private static boolean _ignoreUnknownAttributes = false;

    private static boolean _validateClass = true;

    private static Globals _instance = null;

    static Globals getInstance() {

        if (_instance == null) {

            _instance = new Globals();

            _verbose = (System.getProperty("sun.tools.pack.verify.verbose") == null)

                    ? false : true;

            _ignoreJarDirectories = (System.getProperty("ignoreJarDirectories") == null)

                    ? false : true;

        }

        return _instance;

    }

    static boolean ignoreCompileAttributes() {

        return _ignoreCompileAttributes;

    }

    static boolean ignoreDebugAttributes() {

        return _ignoreDebugAttributes;

    }

    static boolean ignoreUnknownAttributes() {

        return _ignoreUnknownAttributes;

    }

    static boolean ignoreJarDirectories() {

        return _ignoreJarDirectories;

    }

    static boolean validateClass() {

        return _validateClass;

    }

    static void setCheckJarClassOrdering(boolean flag) {

        _checkJarClassOrdering = flag;

    }

    static boolean checkJarClassOrdering() {

        return _checkJarClassOrdering;

    }

    static boolean bitWiseClassCompare() {

        return _bitWiseClassCompare;

    }

    static boolean setBitWiseClassCompare(boolean flag) {

        return _bitWiseClassCompare = flag;

    }

    public static boolean setIgnoreCompileAttributes(boolean flag) {

        return _ignoreCompileAttributes = flag;

    }

    static boolean setIgnoreDebugAttributes(boolean flag) {

        return _ignoreDebugAttributes = flag;

    }

    static boolean setIgnoreUnknownAttributes(boolean flag) {

        return _ignoreUnknownAttributes = flag;

    }

    static boolean setValidateClass(boolean flag) {

        return _validateClass = flag;

    }

    static int getErrors() {

        return errors;

    }

    static void trace(String s) {

        if (_verbose) {

            println(s);

        }

    }

    static void print(String s) {

        _pw.print(s);

    }

    static void println(String s) {

        _pw.println(s);

    }

    static void log(String s) {

        errors++;

        _pw.println("ERROR:" + s);

    }

    static void lognoln(String s) {

        errors++;

        _pw.print(s);

    }

    private static PrintWriter openFile(String fileName) {

        //Lets create the directory if it does not exist.

        File f = new File(fileName);

        File baseDir = f.getParentFile();

        if (baseDir != null && baseDir.exists() == false) {

            baseDir.mkdirs();

        }

        try {

            return new PrintWriter(new FileWriter(f), true);

        } catch (Exception e) {

            throw new RuntimeException(e);

        }

    }

    private static void closeFile() {

        _pw.flush();

        _pw.close();

    }

    static void printPropsToLog() {

        println("Log started " + new Date(System.currentTimeMillis()));

        print(System.getProperty("java.vm.version"));

        println("\t" + System.getProperty("java.vm.name"));

        println("System properties");

        println("\tjava.home=" + System.getProperty("java.home"));

        println("\tjava.class.version=" + System.getProperty("java.class.version"));

        println("\tjava.class.path=" + System.getProperty("java.class.path"));

        println("\tos.name=" + System.getProperty("os.name"));

        println("\tos.arch=" + System.getProperty("os.arch"));

        println("\tos.version=" + System.getProperty("os.version"));

        println("\tuser.name=" + System.getProperty("user.name"));

        println("\tuser.home=" + System.getProperty("user.home"));

        println("\tuser.dir=" + System.getProperty("user.dir"));

        println("\tLocale.getDefault=" + Locale.getDefault());

        println("System properties end");

    }

    static void openLog(String s) {

        _logFileName = (s != null) ? s : "." + File.separator + DEFAULT_LOG_FILE;

        _logFileName = (new File(_logFileName).isDirectory())

                ? _logFileName + File.separator + DEFAULT_LOG_FILE : _logFileName;

        _pw = openFile(_logFileName);

        printPropsToLog();

    }

    static void closeLog() {

        closeFile();

    }

    static String getLogFileName() {

        return _logFileName;

    }

    static void diffCharData(String s1, String s2) {

        boolean diff = false;

        char[] c1 = s1.toCharArray();

        char[] c2 = s2.toCharArray();

        if (c1.length != c2.length) {

            diff = true;

            Globals.log("Length differs: " + (c1.length - c2.length));

        }

        // Take the smaller of the two arrays to prevent Array...Exception

        int minlen = (c1.length < c2.length) ? c1.length : c2.length;

        for (int i = 0; i < c1.length; i++) {

            if (c1[i] != c2[i]) {

                diff = true;

                Globals.lognoln("\t idx[" + i + "] 0x" + Integer.toHexString(c1[i]) + "<>" + "0x" + Integer.toHexString(c2[i]));

                Globals.log(" -> " + c1[i] + "<>" + c2[i]);

            }

        }

    }

    static void diffByteData(String s1, String s2) {

        boolean diff = false;

        byte[] b1 = s1.getBytes();

        byte[] b2 = s2.getBytes();

        if (b1.length != b2.length) {

            diff = true;

            //(+) b1 is greater, (-) b2 is greater

            Globals.log("Length differs diff: " + (b1.length - b2.length));

        }

        // Take the smaller of the two array to prevent Array...Exception

        int minlen = (b1.length < b2.length) ? b1.length : b2.length;

        for (int i = 0; i < b1.length; i++) {

            if (b1[i] != b2[i]) {

                diff = true;

                Globals.log("\t" + "idx[" + i + "] 0x" + Integer.toHexString(b1[i]) + "<>" + "0x" + Integer.toHexString(b2[i]));

            }

        }

    }

    static void dumpToHex(String s) {

        try {

            dumpToHex(s.getBytes("UTF-8"));

        } catch (UnsupportedEncodingException uce) {

            throw new RuntimeException(uce);

        }

    }

    static void dumpToHex(byte[] buffer) {

        int linecount = 0;

        byte[] b = new byte[16];

        for (int i = 0; i < buffer.length; i += 16) {

            if (buffer.length - i > 16) {

                System.arraycopy(buffer, i, b, 0, 16);

                print16Bytes(b, linecount);

                linecount += 16;

            } else {

                System.arraycopy(buffer, i, b, 0, buffer.length - i);

                for (int n = buffer.length - (i + 1); n < 16; n++) {

                    b[n] = 0;

                }

                print16Bytes(b, linecount);

                linecount += 16;

            }

        }

        Globals.log("-----------------------------------------------------------------");

    }

    static void print16Bytes(byte[] buffer, int linecount) {

        final int MAX = 4;

        Globals.lognoln(paddedHexString(linecount, 4) + " ");

        for (int i = 0; i < buffer.length; i += 2) {

            int iOut = pack2Bytes2Int(buffer[i], buffer[i + 1]);

            Globals.lognoln(paddedHexString(iOut, 4) + " ");

        }

        Globals.lognoln("| ");

        StringBuilder sb = new StringBuilder(new String(buffer));

        for (int i = 0; i < buffer.length; i++) {

            if (Character.isISOControl(sb.charAt(i))) {

                sb.setCharAt(i, '.');

            }

        }

        Globals.log(sb.toString());

    }

    static int pack2Bytes2Int(byte b1, byte b2) {

        int out = 0x0;

        out += b1;

        out <<= 8;

        out &= 0x0000ffff;

        out |= 0x000000ff & b2;

        return out;

    }

    static String paddedHexString(int n, int max) {

        char[] c = Integer.toHexString(n).toCharArray();

        char[] out = new char[max];

        for (int i = 0; i < max; i++) {

            out[i] = '0';

        }

        int offset = (max - c.length < 0) ? 0 : max - c.length;

        for (int i = 0; i < c.length; i++) {

            out[offset + i] = c[i];

        }

        return new String(out);

    }

}