/*

 * reserved comment block

 * DO NOT REMOVE OR ALTER!

 */

/*

 * Copyright 1999-2010 The Apache Software Foundation.

 *

 *  Licensed under the Apache License, Version 2.0 (the "License");

 *  you may not use this file except in compliance with the License.

 *  You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 *  Unless required by applicable law or agreed to in writing, software

 *  distributed under the License is distributed on an "AS IS" BASIS,

 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 *  See the License for the specific language governing permissions and

 *  limitations under the License.

 *

 */

package com.sun.org.apache.xml.internal.security.utils;

import java.io.OutputStream;

/**

 * A simple Unsynced ByteArrayOutputStream

 * @author raul

 *

 */

public class UnsyncByteArrayOutputStream extends OutputStream  {

    private static final int INITIAL_SIZE = 8192;

            return new byte[INITIAL_SIZE];

        }

    };

    private byte[] buf;

    private int size = INITIAL_SIZE;

    private int pos = 0;

    public UnsyncByteArrayOutputStream() {

    }

    public void write(byte[] arg0) {

        int newPos = pos + arg0.length;

        if (newPos > size) {

            expandSize(newPos);

        }

        System.arraycopy(arg0, 0, buf, pos, arg0.length);

        pos = newPos;

    }

    public void write(byte[] arg0, int arg1, int arg2) {

        int newPos = pos + arg2;

        if (newPos > size) {

            expandSize(newPos);

        }

        System.arraycopy(arg0, arg1, buf, pos, arg2);

        pos = newPos;

    }

    public void write(int arg0) {

        int newPos = pos + 1;

        if (newPos > size) {

            expandSize(newPos);

        }

        buf[pos++] = (byte)arg0;

    }

    public byte[] toByteArray() {

        byte result[] = new byte[pos];

        System.arraycopy(buf, 0, result, 0, pos);

        return result;

    }

    public void reset() {

        pos = 0;

    }

    private void expandSize(int newPos) {

        int newSize = size;

        while (newPos > newSize) {

            newSize = newSize<<2;

        }

        byte newBuf[] = new byte[newSize];

        System.arraycopy(buf, 0, newBuf, 0, pos);

        buf = newBuf;

        size = newSize;

    }

}