/*

 * 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.

 */

public class Util {

    private Util() { }

    // Returns -1 if equal, o.w. returns index of first difference

    //

    public static int cmp(byte[] ba, byte[] bb) {

        int n = Math.min(ba.length, bb.length);

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

            if ((i >= ba.length) || (i >= bb.length))

                return i;

            if (ba[i] != bb[i])

                return i;

        }

        if (ba.length != bb.length)

            return 0;

        return -1;

    }

    // Returns -1 if equal, o.w. returns index of first difference

    //

    public static int cmp(char[] ca, char[] cb) {

        int n = Math.min(ca.length, cb.length);

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

            if ((i >= ca.length) || (i >= cb.length))

                return i;

            if (ca[i] != cb[i])

                return i;

        }

        if (ca.length != cb.length)

            return 0;

        return -1;

    }

    public static String toString(byte[] ba, int off, int len) {

        StringBuffer sb = new StringBuffer();

        for (int i = off; i < off + len; i++) {

            int c = ba[i];

            if (c == '\\') {

                sb.append("\\\\");

                continue;

            }

            if ((c >= ' ') && (c < 0x7f)) {

                sb.append((char)c);

                continue;

            }

            sb.append("\\x");

            sb.append(Integer.toHexString(c & 0xff));

        }

        return sb.toString();

    }

    public static String toString(byte[] ba) {

        return toString(ba, 0, ba.length);

    }

    public static String toString(char[] ca, int off, int len) {

        StringBuffer sb = new StringBuffer();

        for (int i = off; i < off + len; i++) {

            char c = ca[i];

            if (c == '\\') {

                sb.append("\\\\");

                continue;

            }

            if ((c >= ' ') && (c < 0x7f)) {

                sb.append(c);

                continue;

            }

            sb.append("\\u");

            String s = Integer.toHexString(c);

            while (s.length() < 4)

                s = "0" + s;

            sb.append(s);

        }

        return sb.toString();

    }

    public static String toString(char[] ca) {

        return toString(ca, 0, ca.length);

    }

    public static String toString(String s) {

        return toString(s.toCharArray());

    }

    public static String toString(char c) {

        return toString(new char[]{ c });

    }

}